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Kanna RM, Shafeeq GM, Shetty AP, Rajasekaran S. The incidence and risk factors for unplanned readmission within 90 days after surgical treatment of spinal fractures. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2024:10.1007/s00586-024-08420-5. [PMID: 39048842 DOI: 10.1007/s00586-024-08420-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 07/15/2024] [Accepted: 07/17/2024] [Indexed: 07/27/2024]
Abstract
INTRODUCTION Unplanned readmissions after spine surgery are undesired, and cause significant functional, and financial distress to the patients and healthcare system. Though critical, knowledge about readmissions after surgery for traumatic spinal injuries (TSI) is scarce and under-evaluated. METHODS Consecutive patients surgically treated for TSI and who had unplanned readmission within 90 days post-discharge were studied. Peri-operative demographic and surgical variables, surgical treatment, level of injury, delay in surgery, ASIA score, other organ injuries, peri-operative complications, smoking, ICU stay, co-morbidity, and the length of hospital stay were studied and correlated with the causes for readmission. RESULTS Among 884 patients, 4.98% (n = 44) had unplanned readmissions within 90 days of discharge. Notably, 50% (n = 22) patients were readmitted within the first 30 days. The common causes of readmissions were urinary tract related problems (27%, n = 12), pressure ulcers (20.4%, n = 9), respiratory problems (13.6%, n = 6), surgical wound related problems (14%, n = 7,) limb injuries (11.4%, n = 5), and others (11%, n = 5). The total beds lost secondary to readmissions was 314 days, and the mean bed-days lost per patient was 7.2 ± 5.1. Thirteen peri-operative risk factors were associated with unplanned readmissions, among which, smoking (OR 2.2), diabetes (OR 2.4), and pressure sore during index admission (OR 16.7) were strong independent predictors. CONCLUSION The incidence of unplanned readmissions after TSI was 5%, which was similar to elective spine surgeries but the causes and risk factors are different. Non-surgical complications related to urinary tract, respiratory care and pressure sores were the most common causes. Pre-operative smoking status, diabetes mellitus and pressure sores noted in the index admission were important independent risk factors.
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Affiliation(s)
- Rishi M Kanna
- Department of Orthopaedics and Spine Surgery, Ganga Hospital, Coimbatore, Tamil Nadu, India.
| | - Gulam Muhammed Shafeeq
- Department of Orthopaedics and Spine Surgery, Ganga Hospital, Coimbatore, Tamil Nadu, India
| | - Ajoy P Shetty
- Department of Orthopaedics and Spine Surgery, Ganga Hospital, Coimbatore, Tamil Nadu, India
| | - S Rajasekaran
- Department of Orthopaedics and Spine Surgery, Ganga Hospital, Coimbatore, Tamil Nadu, India
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Leyendecker J, Prasse T, Park C, Köster M, Rumswinkel L, Shenker T, Bieler E, Eysel P, Bredow J, Zaki MM, Kathawate V, Harake E, Joshi RS, Konakondla S, Kashlan ON, Derman P, Telfeian A, Hofstetter CP. 90-Day Emergency Department Utilization and Readmission Rate After Full-Endoscopic Spine Surgery: A Multicenter, Retrospective Analysis of 821 Patients. Neurosurgery 2024:00006123-990000000-01291. [PMID: 39023273 DOI: 10.1227/neu.0000000000003095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Accepted: 05/22/2024] [Indexed: 07/20/2024] Open
Abstract
BACKGROUND AND OBJECTIVES Emergency department (ED) utilization and readmission rates after spine surgery are common quality of care measures. Limited data exist on the evaluation of quality indicators after full-endoscopic spine surgery (FESS). The objective of this study was to detect rates, causes, and risk factors for unplanned postoperative clinic utilization after FESS. METHODS This retrospective multicenter analysis assessed ED utilization and clinic readmission rates after FESS performed between 01/2014 and 04/2023 for degenerative spinal pathologies. Outcome measures were ED utilizations, hospital readmissions, and revision surgeries within 90 days postsurgery. RESULTS Our cohort includes 821 patients averaging 59 years of age, who underwent FESS. Most procedures targeted the lumbar or sacral spine (85.75%) while a small fraction involved the cervical spine (10.11%). The most common procedures were lumbar unilateral laminotomies for bilateral decompression (40.56%) and lumbar transforaminal discectomies (25.58%). Within 90 days postsurgery, 8.0% of patients revisited the ED for surgical complications. A total of 2.2% of patients were readmitted to a hospital of which 1.9% required revision surgery. Primary reasons for ED visits and clinic readmissions were postoperative pain exacerbation, transient neurogenic bladder dysfunction, and recurrent disk herniations. Our multivariate regression analysis revealed that female patients had a significantly higher likelihood of using the ED (P = .046; odds ratio: 1.77, 95% CI 1.01-3.1 5.69% vs 10.33%). Factors such as age, American Society of Anesthesiologists class, body mass index, comorbidities, and spanned spinal levels did not significantly predict postoperative ED utilization. CONCLUSION This analysis demonstrates the safety of FESS, as evidenced by acceptable rates of ED utilization, clinic readmission, and revision surgery. Future studies are needed to further elucidate the safety profile of FESS in comparison with traditional spinal procedures.
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Affiliation(s)
- Jannik Leyendecker
- Department of Neurological Surgery, University of Washington, Seattle, Washington, USA
- Department of Orthopedics and Trauma Surgery, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Tobias Prasse
- Department of Orthopedics and Trauma Surgery, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Christine Park
- Department of Neurological Surgery, University of Washington, Seattle, Washington, USA
| | - Malin Köster
- Department of Orthopedics and Trauma Surgery, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Lena Rumswinkel
- Department of Orthopedics and Trauma Surgery, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Tara Shenker
- College of Osteopathic Medicine, Nova Southeastern University, Fort Lauderdale-Davie, Florida, USA
| | - Eliana Bieler
- Department of Neurological Surgery, University of Washington, Seattle, Washington, USA
| | - Peer Eysel
- Department of Orthopedics and Trauma Surgery, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Jan Bredow
- Department of Orthopedics and Trauma Surgery, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
- Department of Orthopedics and Trauma Surgery, Krankenhaus Porz am Rhein, University of Cologne, Cologne, Germany
| | - Mark M Zaki
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Varun Kathawate
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Edward Harake
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Rushikesh S Joshi
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Sanjay Konakondla
- Department of Neurosurgery, Geisinger Neuroscience Institute, Danville, Pennsylvania, USA
| | - Osama N Kashlan
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA
| | | | - Albert Telfeian
- Department of Neurosurgery, Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA
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Cabrera A, Bouterse A, Nelson M, Thomas L, Ramos O, Cheng W, Danisa O. Application of machine learning algorithms to predict 30-day hospital readmission following cement augmentation for osteoporotic vertebral compression fractures. World Neurosurg X 2024; 23:100338. [PMID: 38497061 PMCID: PMC10943990 DOI: 10.1016/j.wnsx.2024.100338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 11/13/2023] [Accepted: 02/21/2024] [Indexed: 03/19/2024] Open
Abstract
Objective Osteoporosis is a common skeletal disease that greatly increases the risk of pathologic fractures and accounts for approximately 700,000 vertebral compression fractures (VCFs) annually in the United States. Cement augmentation procedures such as balloon kyphoplasty (KP) and percutaneous vertebroplasty (VP) have demonstrated efficacy in the treatment of VCFs, however, some studies report rates of readmission as high as 10.8% following such procedures. The purpose of this study was to employ Machine Learning (ML) algorithms to predict 30-day hospital readmission following cement augmentation procedures for the treatment of VCFs using the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) database. Methods ACS-NSQIP was queried to identify patients undergoing either KP or VP from 2011 to 2014. Three ML algorithms were constructed and tasked with predicting post-operative readmissions within this cohort of patients. Results: Postoperative pneumonia, ASA Class 2 designation, age, partially-dependent functional status, and a history of smoking were independently identified as highly predictive of readmission by all ML algorithms. Among these variables postoperative pneumonia (p < 0.01), ASA Class 2 designation (p < 0.01), age (p = 0.002), and partially-dependent functional status (p < 0.01) were found to be statistically significant. Predictions were generated with an average AUC value of 0.757 and an average accuracy of 80.5%. Conclusions Postoperative pneumonia, ASA Class 2 designation, partially-dependent functional status, and age are perioperative variables associated with 30-day readmission following cement augmentation procedures. The use of ML allows for quantification of the relative contributions of these variables toward producing readmission.
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Affiliation(s)
- Andrew Cabrera
- School of Medicine, Loma Linda University, Loma Linda, CA, 92354, USA
| | | | - Michael Nelson
- School of Medicine, Loma Linda University, Loma Linda, CA, 92354, USA
| | - Luke Thomas
- School of Medicine, Loma Linda University, Loma Linda, CA, 92354, USA
| | - Omar Ramos
- Twin Cities Spine Center, Minneapolis, MN 55404, USA
| | - Wayne Cheng
- Jerry L Pettis Memorial Veterans Hospital, Loma Linda, CA, 92354, USA
| | - Olumide Danisa
- Department of Orthopedics, Loma Linda University, Loma Linda, CA, 92354, USA
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Zhang H, Zhao Y, Du Y, Yang Y, Zhang J, Wang S. Optimal time window for initiating cefuroxime surgical antimicrobial prophylaxis in spinal fusion surgery: a nested case-control study. Spine J 2024; 24:961-968. [PMID: 38301900 DOI: 10.1016/j.spinee.2024.01.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 01/22/2024] [Indexed: 02/03/2024]
Abstract
BACKGROUND CONTEXT Surgical site infections (SSI) are one of the common complications following spinal fusion surgery. Unfortunately, several studies had shown conflicting results regarding optimal timing of surgical antimicrobial prophylaxis (SAP) administration. Due to limitations in population homogeneity and sample size, these studies have not provided significant statistical correlations or clear practical recommendations. PURPOSE The purpose of the study was to investigate the impact of timing of cefuroxime SAP on the risk of SSI in patients undergoing spinal fusion surgery, and to determine the optimal timing of administration. DESIGN Retrospective nested case-control study. PATIENT SAMPLE We retrospectively analyzed consecutive patients who underwent spinal fusion surgery at our institution between October 2011 and October 2021. OUTCOME MEASURE In the current study, the primary outcome measure was SSI. METHODS This was a retrospective nested case-control study. All consecutive patients who underwent spinal fusion surgery at our institution between October 2011 and October 2021 formed a retrospective cohort. For each SSI case, 2 controls free of SSI at the time of the index date of their corresponding case were selected, matched by age, sex, and calendar year. Electronic record and radiographic data were reviewed retrospectively in electronic database. SAP related data included timing of administration, preoperative dose, intraoperative second dose, and postoperative use. To examine the effects of mismatched variables, we further adjusted for possible confounding factors using conditional logistic regression models. Subsequently, subgroup analyses were conducted to assess the robustness of the statistical associations. RESULTS According to the preplanned statistical scheme and matching factors, we matched 236 controls for these SSI cases, and the subsequent statistical analysis was performed on these 354 patients. After adjusting for confounding factors, the results indicated that the risk of SSI was 70% higher in the group receiving SAP 31 to 60 minutes before incision compared to the group receiving SAP 0 to 30 minutes before incision (OR=1.732, 95%CI 1.031-2.910, p=.038). Additionally, the risk of SSI was 150% higher in the group receiving SAP 61 to 120 minutes before incision compared to the group receiving SAP 0 to 30 minutes before incision (OR=2.532, 95%CI 1.250-5.128, p=.010). In subgroup analysis, this statistical trend persisted for both deformity surgeries and different SSI classifications. CONCLUSION Administering cefuroxime SAP within 30 minutes before skin incision significantly reduces the risk of SSI, whether they are deep or superficial, in spinal fusion surgery. This pattern remains consistent among spinal deformity patients.
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Affiliation(s)
- Haoran Zhang
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, 1st Shuai Fu Yuan, Dongcheng District, Beijing, China
| | - Yiwei Zhao
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, 1st Shuai Fu Yuan, Dongcheng District, Beijing, China
| | - You Du
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, 1st Shuai Fu Yuan, Dongcheng District, Beijing, China
| | - Yang Yang
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, 1st Shuai Fu Yuan, Dongcheng District, Beijing, China
| | - Jianguo Zhang
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, 1st Shuai Fu Yuan, Dongcheng District, Beijing, China
| | - Shengru Wang
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, 1st Shuai Fu Yuan, Dongcheng District, Beijing, China.
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Elsamadicy AA, Koo AB, Reeves BC, Cross JL, Hersh A, Hengartner AC, Karhade AV, Pennington Z, Akinduro OO, Larry Lo SF, Gokaslan ZL, Shin JH, Mendel E, Sciubba DM. Utilization of Machine Learning to Model Important Features of 30-day Readmissions following Surgery for Metastatic Spinal Column Tumors: The Influence of Frailty. Global Spine J 2024; 14:1227-1237. [PMID: 36318478 PMCID: PMC11289550 DOI: 10.1177/21925682221138053] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
STUDY DESIGN Retrospective cohort study. OBJECTIVE The aim of this study was to determine the relative importance and predicative power of the Hospital Frailty Risk Score (HFRS) on unplanned 30-day readmission after surgical intervention for metastatic spinal column tumors. METHODS All adult patients undergoing surgery for metastatic spinal column tumor were identified in the Nationwide Readmission Database from the years 2016 to 2018. Patients were categorized into 3 cohorts based on the criteria of the HFRS: Low(<5), Intermediate(5-14.9), and High(≥ 15). Random Forest (RF) classification was used to construct predictive models for 30-day patient readmission. Model performance was examined using the area under the receiver operating curve (AUC), and the Mean Decrease Gini (MDG) metric was used to quantify and rank features by relative importance. RESULTS There were 4346 patients included. The proportion of patients who required any readmission were higher among the Intermediate and High frailty cohorts when compared to the Low frailty cohort (Low:33.9% vs. Intermediate:39.3% vs. High:39.2%, P < .001). An RF classifier was trained to predict 30-day readmission on all features (AUC = .60) and architecturally equivalent model trained using only ten features with highest MDG (AUC = .59). Both models found frailty to have the highest importance in predicting risk of readmission. On multivariate regression analysis, Intermediate frailty [OR:1.32, CI(1.06,1.64), P = .012] was found to be an independent predictor of unplanned 30-day readmission. CONCLUSION Our study utilizes machine learning approaches and predictive modeling to identify frailty as a significant risk-factor that contributes to unplanned 30-day readmission after spine surgery for metastatic spinal column metastases.
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Affiliation(s)
| | - Andrew B. Koo
- Department of Neurosurgery, Yale University School of Medicine, New Haven, CT, USA
| | - Benjamin C. Reeves
- Department of Neurosurgery, Yale University School of Medicine, New Haven, CT, USA
| | - James L. Cross
- Department of Neurosurgery, Yale University School of Medicine, New Haven, CT, USA
| | - Andrew Hersh
- Department of Neurosurgery, John Hopkins School of Medicine, Baltimore, MD, USA
| | - Astrid C. Hengartner
- Department of Neurosurgery, Yale University School of Medicine, New Haven, CT, USA
| | - Aditya V. Karhade
- Department of Orthopedics, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | | | | | - Sheng-Fu Larry Lo
- Department of Neurosurgery, Zucker School of Medicine at Hofstra, Long Island Jewish Medical Center and North Shore University Hospital, Northwell Health, Manhasset, NY, USA
| | - Ziya L. Gokaslan
- Department of Neurosurgery, The Warren Alpert Medical School of Brown University, Providence, RI, USA
| | - John H. Shin
- Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Ehud Mendel
- Department of Neurosurgery, Yale University School of Medicine, New Haven, CT, USA
| | - Daniel M. Sciubba
- Department of Neurosurgery, John Hopkins School of Medicine, Baltimore, MD, USA
- Department of Neurosurgery, Zucker School of Medicine at Hofstra, Long Island Jewish Medical Center and North Shore University Hospital, Northwell Health, Manhasset, NY, USA
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Kumar N, Hui SJ, Lee R, Athia S, Rothenfluh DA, Tan JH. Implant and construct decision-making in metastatic spine tumour surgery: a review of current concepts with a decision-making algorithm. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2024; 33:1899-1910. [PMID: 38289374 DOI: 10.1007/s00586-023-07987-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 08/15/2023] [Accepted: 10/02/2023] [Indexed: 06/18/2024]
Abstract
STUDY DESIGN Narrative Review. OBJECTIVE Metastatic spine tumour surgery (MSTS) is an important treatment modality of metastatic spinal disease (MSD). Increase in MSTS has been due to improvements in our oncological treatment, as patients have increased longevity and even those with poorer comorbidities are now being considered for surgery. However, there is currently no guideline on how MSTS surgeons should select the appropriate levels to instrument, and which type of implants should be utilised. METHODS The current literature on MSTS was reviewed to study implant and construct decision making factors, with a view to write this narrative review. All studies that were related to instrumentation in MSTS were included. RESULTS A total of 58 studies were included in this review. We discuss novel decision-making models that should be taken into account when planning for surgery in patients undergoing MSTS. These factors include the quality of bone for instrumentation, the extent of the construct required for MSTS patients, the use of cement augmentation and the choice of implant. Various studies have advocated for the use of these modalities and demonstrated better outcomes in MSTS patients when used appropriately. CONCLUSION We have established a new instrumentation algorithm that should be taken into consideration for patients undergoing MSTS. It serves as an important guide for surgeons treating MSTS, with the continuous evolvement of our treatment capacity in MSD. LEVEL OF EVIDENCE IV
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Affiliation(s)
- Naresh Kumar
- Department of Orthopaedic Surgery, University Spine Centre, National University Health System, Level 11, 1E Lower Kent Ridge Road, Singapore, 119228, Singapore.
| | - Si Jian Hui
- Department of Orthopaedic Surgery, University Spine Centre, National University Health System, Level 11, 1E Lower Kent Ridge Road, Singapore, 119228, Singapore
| | - Renick Lee
- Department of Orthopaedic Surgery, University Spine Centre, National University Health System, Level 11, 1E Lower Kent Ridge Road, Singapore, 119228, Singapore
| | - Sahil Athia
- Department of Orthopaedic Surgery, University Spine Centre, National University Health System, Level 11, 1E Lower Kent Ridge Road, Singapore, 119228, Singapore
| | - Dominique A Rothenfluh
- Centre for Spinal Surgery, CHUV University Hospital Lausanne, Rue du Bugnon 46, 1005, Lausanne, Switzerland
| | - Jiong Hao Tan
- Department of Orthopaedic Surgery, University Spine Centre, National University Health System, Level 11, 1E Lower Kent Ridge Road, Singapore, 119228, Singapore
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Shetty KD, Chen PG, Brara HS, Anand N, Skaggs DL, Calsavara VF, Qureshi NS, Weir R, McKelvey K, Nuckols TK. Variations in surgical practice and short-term outcomes for degenerative lumbar scoliosis and spondylolisthesis: do surgeon training and experience matter? Int J Qual Health Care 2024; 36:mzad109. [PMID: 38156345 PMCID: PMC10849168 DOI: 10.1093/intqhc/mzad109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 11/30/2023] [Accepted: 12/28/2023] [Indexed: 12/30/2023] Open
Abstract
For diverse procedures, sizable geographic variation exists in rates and outcomes of surgery, including for degenerative lumbar spine conditions. Little is known about how surgeon training and experience are associated with surgeon-level variations in spine surgery practice and short-term outcomes. This retrospective observational analysis characterized variations in surgical operations for degenerative lumbar scoliosis or spondylolisthesis, two common age-related conditions. The study setting was two large spine surgery centers in one region during 2017-19. Using data (International Classification of Diseases-10th edition and current procedural terminology codes) extracted from electronic health record systems, we characterized surgeon-level variations in practice (use of instrumented fusion - a more extensive procedure that involves device-related risks) and short-term postoperative outcomes (major in-hospital complications and readmissions). Next, we tested for associations between surgeon training (specialty and spine fellowship) and experience (career stage and operative volume) and use of instrumented fusion as well as outcomes. Eighty-nine surgeons performed 2481 eligible operations. For the study diagnoses, spine surgeons exhibited substantial variation in operative volume, use of instrumented fusion, and postoperative outcomes. Among surgeons above the median operative volume, use of instrumented fusion ranged from 0% to >90% for scoliosis and 9% to 100% for spondylolisthesis, while rates of major in-hospital complications ranged from 0% to 25% for scoliosis and from 0% to 14% for spondylolisthesis. For scoliosis, orthopedic surgeons were more likely than neurosurgeons to perform instrumented fusion for scoliosis [49% vs. 33%, odds ratio (OR) = 2.3, 95% confidence interval (95% CI) 1.3-4.2, P-value = .006] as were fellowship-trained surgeons (49% vs. 25%, OR = 3.0, 95% CI 1.6-5.8; P = .001). Fellowship-trained surgeons had lower readmission rates. Surgeons with higher operative volumes used instrumented fusion more often (OR = 1.1, 95% CI 1.0-1.2, P < .05 for both diagnoses) and had lower rates of major in-hospital complications (OR = 0.91, 95% CI 0.85-0.97; P = .006). Surgical practice can vary greatly for degenerative spine conditions, even within the same region and among colleagues at the same institution. Surgical specialty and subspecialty, in addition to recent operative volume, can be linked to variations in spine surgeons' practice patterns and outcomes. These findings reinforce the notion that residency and fellowship training may contribute to variation and present important opportunities to optimize surgical practice over the course of surgeons' careers. Future efforts to reduce unexplained variation in surgical practice could test interventions focused on graduate medical education. Graphical Abstract.
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Affiliation(s)
- Kanaka D Shetty
- RAND Health Care, RAND Corporation, 1776 Main Street, Santa Monica, CA 90401, USA
| | - Peggy G Chen
- RAND Health Care, RAND Corporation, 1776 Main Street, Santa Monica, CA 90401, USA
| | - Harsimran S Brara
- Kaiser Permanente, Los Angeles Medical Center, 4867 W Sunset Blvd, Los Angeles, CA 90027, USA
| | - Neel Anand
- Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Los Angeles, CA 90048, USA
| | - David L Skaggs
- Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Los Angeles, CA 90048, USA
| | | | - Nabeel S Qureshi
- Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Los Angeles, CA 90048, USA
| | - Rebecca Weir
- RAND Health Care, RAND Corporation, 1776 Main Street, Santa Monica, CA 90401, USA
| | - Karma McKelvey
- Rocky Vista University, Montana College of Osteopathic Medicine, 4130 Rocky Vista Way, Billings, Montana 59106, USA
| | - Teryl K Nuckols
- RAND Health Care, RAND Corporation, 1776 Main Street, Santa Monica, CA 90401, USA
- Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Los Angeles, CA 90048, USA
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Mullen AN, Wieser E. Improvement of operating room air quality and sustained reduction of surgical site infections in an orthopedic specialty hospital. Am J Infect Control 2024; 52:183-190. [PMID: 37276956 DOI: 10.1016/j.ajic.2023.05.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 05/29/2023] [Accepted: 05/31/2023] [Indexed: 06/07/2023]
Abstract
INTRODUCTION Surgical site infection (SSI) rates can be impacted by air quality, and a high-efficiency particulate air and ultraviolet air recirculation system (HUAIRS) has been shown to improve operating room air quality. This study examined the impact of HUAIRS devices on SSI rates when used at an orthopedic specialty hospital. METHODS HUAIRS devices were used intraoperatively at the facility. Total particle counts before and after HUAIRS implementation were compared. SSI rates for nervous system procedures or for all procedures at the facility were also compared for the 2.5-year periods before and after implementing HUAIRS devices. RESULTS Over 30,000 consecutive procedures were performed from 2017 to 2022. The overall SSI rate at the facility was 0.45% before implementing HUAIRS devices compared to 0.22% (P < 0.001) after. The SSI rate following nervous system procedures was 2.06% before implementing HUAIRS devices versus 0.29% (P < .001) after. Total particle counts were also significantly lower after implementing HUAIRS devices. DISCUSSION AND CONCLUSIONS Implementation of HUAIRS devices at an orthopedic specialty hospital is associated with significant reductions in SSI rates and intraoperative air contamination levels. These data support the need to further investigate intraoperative air quality interventions for the reduction in SSI rates.
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Affiliation(s)
- Anildaliz N Mullen
- Baylor Scott & White Health, Baylor Scott & White Orthopedic and Spine Hospital, Arlington, TX.
| | - Eric Wieser
- Baylor Scott & White Health, Baylor Scott & White Orthopedic and Spine Hospital, Arlington, TX
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Cheung ATM, Kurland DB, Neifert S, Mandelberg N, Nasir-Moin M, Laufer I, Pacione D, Lau D, Frempong-Boadu AK, Kondziolka D, Golfinos JG, Oermann EK. Developing an Automated Registry (Autoregistry) of Spine Surgery Using Natural Language Processing and Health System Scale Databases. Neurosurgery 2023; 93:1228-1234. [PMID: 37345933 DOI: 10.1227/neu.0000000000002568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 04/25/2023] [Indexed: 06/23/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Clinical registries are critical for modern surgery and underpin outcomes research, device monitoring, and trial development. However, existing approaches to registry construction are labor-intensive, costly, and prone to manual error. Natural language processing techniques combined with electronic health record (EHR) data sets can theoretically automate the construction and maintenance of registries. Our aim was to automate the generation of a spine surgery registry at an academic medical center using regular expression (regex) classifiers developed by neurosurgeons to combine domain expertise with interpretable algorithms. METHODS We used a Hadoop data lake consisting of all the information generated by an academic medical center. Using this database and structured query language queries, we retrieved every operative note written in the department of neurosurgery since our transition to EHR. Notes were parsed using regex classifiers and compared with a random subset of 100 manually reviewed notes. RESULTS A total of 31 502 operative cases were downloaded and processed using regex classifiers. The codebase required 5 days of development, 3 weeks of validation, and less than 1 hour for the software to generate the autoregistry. Regex classifiers had an average accuracy of 98.86% at identifying both spinal procedures and the relevant vertebral levels, and it correctly identified the entire list of defined surgical procedures in 89% of patients. We were able to identify patients who required additional operations within 30 days to monitor outcomes and quality metrics. CONCLUSION This study demonstrates the feasibility of automatically generating a spine registry using the EHR and an interpretable, customizable natural language processing algorithm which may reduce pitfalls associated with manual registry development and facilitate rapid clinical research.
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Affiliation(s)
| | - David B Kurland
- Department of Neurosurgery, NYU Langone Health, New York , New York , USA
| | - Sean Neifert
- Department of Neurosurgery, NYU Langone Health, New York , New York , USA
| | | | - Mustafa Nasir-Moin
- Department of Neurosurgery, NYU Langone Health, New York , New York , USA
| | - Ilya Laufer
- Department of Neurosurgery, NYU Langone Health, New York , New York , USA
| | - Donato Pacione
- Department of Neurosurgery, NYU Langone Health, New York , New York , USA
| | - Darryl Lau
- Department of Neurosurgery, NYU Langone Health, New York , New York , USA
| | | | - Douglas Kondziolka
- Department of Neurosurgery, NYU Langone Health, New York , New York , USA
| | - John G Golfinos
- Department of Neurosurgery, NYU Langone Health, New York , New York , USA
| | - Eric Karl Oermann
- Department of Neurosurgery, NYU Langone Health, New York , New York , USA
- Department of Radiology, NYU Langone Health, New York , New York , USA
- Center for Data Science, New York University, New York , New York , USA
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Amen TB, Song J, Mai E, Rudisill SS, Bovonratwet P, Subramanian T, Kaidi AK, Maayan O, Qureshi SA, Iyer S. Unplanned readmissions following ambulatory spine surgery: assessing common reasons and risk factors. Spine J 2023; 23:1848-1857. [PMID: 37716549 DOI: 10.1016/j.spinee.2023.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 08/29/2023] [Accepted: 09/06/2023] [Indexed: 09/18/2023]
Abstract
BACKGROUND CONTEXT Although outpatient spine surgery is becoming increasingly popular in the United States, unplanned readmission following outpatient surgery remains a significant postoperative concern. PURPOSE This study aimed to (1) describe the incidence and timing of 30-day unplanned readmission after ambulatory lumbar and cervical spine surgery (2) evaluate the common reasons for readmission, and (3) identify factors associated with readmission in this population. STUDY DESIGN/SETTING Retrospective cohort study. PATIENT SAMPLE Patients who underwent ambulatory cervical or lumbar spine surgery between 2015 and 2020 were identified in the National Surgical Quality Improvement Program (NSQIP) database. OUTCOME MEASURES Hospital readmission within 30 postoperative days. METHODS Patients who underwent ambulatory cervical or lumbar spine surgery between 2015 and 2020 were identified using the National Surgical Quality Improvement Program (NSQIP) database. Reasons for and timing of unplanned readmissions were recorded. Multivariable poisson regressions were employed to determine any independent predictors of readmission. RESULTS A total of 33,092 ambulatory cervical and 68,115 ambulatory lumbar spine surgery patients were identified. Incidences of 30-day readmission were 3.37% and 3.07% among cervical and lumbar patients, respectively. The most common surgical site-related reasons for readmission included uncontrolled pain, recurrence of disc herniation or major symptom, and postoperative hematoma/seroma. Common nonsurgical site-related reasons included gastrointestinal, neurological, and cardiovascular complications. Factors associated with readmission among cervical patients included age ≥55, BMI ≥35, functional dependence, diabetes, smoking, COPD, and steroid use, whereas factors associated with readmission following lumbar spine surgery included age ≥65, female sex, BMI ≥35, functional dependence, ASA ≥3, diabetes, smoking, COPD, and hypertension (p<.05 for all). CONCLUSION This study highlights the common reasons and factors associated with unplanned readmission following ambulatory spine surgery. Consideration of these factors may be critical to ensuring appropriate patient selection for ambulatory spine surgery.
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Affiliation(s)
- Troy B Amen
- Department of Orthopaedic Surgery, Hospital for Special Surgery, 535 East 70th St, New York, NY, USA.
| | - Junho Song
- Department of Orthopaedic Surgery, Hospital for Special Surgery, 535 East 70th St, New York, NY, USA
| | - Eric Mai
- Department of Orthopaedic Surgery, Hospital for Special Surgery, 535 East 70th St, New York, NY, USA
| | - Samuel S Rudisill
- Rush Medical College, Rush University Medical Center, Chicago, IL, USA
| | - Patawut Bovonratwet
- Department of Orthopaedic Surgery, Hospital for Special Surgery, 535 East 70th St, New York, NY, USA
| | - Tejas Subramanian
- Department of Orthopaedic Surgery, Hospital for Special Surgery, 535 East 70th St, New York, NY, USA
| | - Austin K Kaidi
- Department of Orthopaedic Surgery, Hospital for Special Surgery, 535 East 70th St, New York, NY, USA
| | - Omri Maayan
- Department of Orthopaedic Surgery, Hospital for Special Surgery, 535 East 70th St, New York, NY, USA
| | - Sheeraz A Qureshi
- Department of Orthopaedic Surgery, Hospital for Special Surgery, 535 East 70th St, New York, NY, USA
| | - Sravisht Iyer
- Department of Orthopaedic Surgery, Hospital for Special Surgery, 535 East 70th St, New York, NY, USA
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11
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Duc A, Solumsmoen S, Bari TJ, Bech-Azeddine R. 30-and 90-day readmissions in lumbar spine surgery. Differences in prevalence and causes. Clin Neurol Neurosurg 2023; 234:107991. [PMID: 37774526 DOI: 10.1016/j.clineuro.2023.107991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 09/16/2023] [Accepted: 09/24/2023] [Indexed: 10/01/2023]
Abstract
BACKGROUND The morbidity associated with surgical treatment of lumbar degenerative conditions has attracted increasing interest due to the economic impact on society, especially postoperative readmission. Limited studies have assessed this risk in a prospective, single-center consecutive fashion. OBJECTIVE To assess the incidence and causes of 30- and 90-day unplanned readmission and revision surgery following surgical treatment for lumbar degenerative spine conditions at a tertiary treatment center. STUDY DESIGN Prospective, single-center cohort study. METHODS All patients undergoing degenerative lumbar spine surgery in a 1-year period from February 1st, 2016, were prospectively included. Patient characteristics, surgical information and information regarding postoperative complications, including readmission (30- and 90-days) and revision surgery were recorded. Readmissions were classified according to whether they were due to the surgical intervention specifically, or a medical complication. RESULTS A total of 1399 patients underwent surgery for various lumbar degenerative pathologies in the study period and all were included. Of these, 9.4% (n = 132) were readmitted within 30 days of surgery and in some cases, multiple readmissions occurred (up to 3). The total 90-day readmission rate was 17.6%. Of these, 15% were related to the surgical procedure. The predominant medical related causes were systemic infection (30-day: 14.4%, 90-day: 10.7%), neurological symptoms (30-day: 6.3%, 90-day: 5.0%) and cardiovascular events (30-day: 8.1%, 90-day: 12.9%). The surgical related causes for readmission were pain (30-day: 13.1%, 90-day: 2.9%), wound complications (30-day: 11.3%, 90-day: 5.0% and re-herniation (30-day: 13.1%, 90-day: 2.9%). Age was the only factor with significant influence on readmission. CONCLUSION The incidence of medical conditions causing unplanned 30-day readmissions following surgery for lumbar degenerative conditions, is significantly higher compared to readmissions related specifically to the surgical procedure. Examples of medical treatment included antibiotics, analgesics, laxatives, anticoagulants and beta blockers. The difference is even more pronounced for the 90-day readmissions. The predominant medical causes were systemic infections, neurological and cardiovascular events. Predominant causes related to the surgery were pain, wound complications and re-herniations. Readmissions may be reduced by optimizing the medical treatment and the pain management before discharge of the patient.
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Affiliation(s)
- Anna Duc
- Copenhagen Spine Research Unit (CSRU), Section of Spine Surgery, Center for Rheumatology and Spine Diseases, Rigshospitalet, Valdemar Hansens vej 17, 2600 Glostrup, Denmark.
| | - Stian Solumsmoen
- Copenhagen Spine Research Unit (CSRU), Section of Spine Surgery, Center for Rheumatology and Spine Diseases, Rigshospitalet, Valdemar Hansens vej 17, 2600 Glostrup, Denmark
| | - Tanvir Johanning Bari
- Spine Unit, Department of Orthopedic Surgery, Rigshospitalet, Copenhagen University Hospital, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Rachid Bech-Azeddine
- Copenhagen Spine Research Unit (CSRU), Section of Spine Surgery, Center for Rheumatology and Spine Diseases, Rigshospitalet, Valdemar Hansens vej 17, 2600 Glostrup, Denmark; Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
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12
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Hu Y, Wang L, Liu H, Yang K, Wang S, Zhang X, Qu B, Yang H. Association of preoperative hypoprotein malnutrition with spinal postoperative complications and other conditions: A systematic review and meta-analysis. Clin Nutr ESPEN 2023; 57:448-458. [PMID: 37739691 DOI: 10.1016/j.clnesp.2023.07.083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 07/14/2023] [Accepted: 07/17/2023] [Indexed: 09/24/2023]
Abstract
BACKGROUND Postoperative complications of spinal surgery are a common clinical problem, which impose significant economic and clinical burdens on patients and medical staff. Previous studies have suggested a close relationship between low-protein malnutrition and postoperative complications of surgery. However, the relationship between preoperative malnutrition and various orthopedic postoperative complications remains unclear. PURPOSE To investigate the association between protein malnutrition and postoperative complications and outcomes. METHODS We conducted a systematic search of the PubMed, Embase, Cochrane Library, and Web of Science databases for published research articles between the database inception and February 28th, 2023, that evaluated the association between malnutrition and the risk of postoperative complications and death in spinal surgery patients. Malnutrition was defined as low pre-albumin and albumin levels before surgery. Two evaluators independently extracted study data and assessed the risk of bias in each study. Fixed- or random-effect models were used to calculate the pooled effect estimates. Funnel plots and Egger's tests were used to detect publication bias, and the Trim-and -Fill method was conducted to evaluate the impact of publication bias on the results. RESULTS A total of 26 studies were included in this meta-analysis, comprising 17 retrospective cohort studies and 9 case-control studies. The study included more than 86,000 participants. Analysis of postoperative complications revealed that the overall incidence of malnutrition-related complications after surgery was 3.17 times higher (OR = 3.17, 95% CI 2.69-3.75, z = 13.57, P < 0.05). The incidence of surgical site infections was 2.08 times higher (OR = 2.08, 95% CI 1.66-2.62, z = 6.307, P < 0.05), and the incidence of postoperative urinary tract infections was 2.55 times higher (OR = 2.55, 95% CI 1.80-3.60, z = 5.30, P < 0.05). The incidence of postoperative sepsis was 3.31 times higher (OR = 3.31, 95% CI 2.31-4.75, z = 6.51, P < 0.05), and the incidence of postoperative pneumonia was 3.02 times higher (OR = 3.02, 95% CI 1.331-6.857, z = 2.64, P = 0.008 < 0.05). The incidence of postoperative cardiac complications was 4.24 times higher (OR = 4.24, 95% CI 2.45-7.35, z = 5.15, P < 0.05), and the incidence of postoperative renal complications was 4.04 times higher (OR = 4.04, 95% CI 2.06-7.93, z = 4.05, P < 0.05). The incidence of postoperative pulmonary complications was 2.38 times higher (OR = 2.38, 95% CI 1.46-3.87, z = 6.98, P < 0.05), while the incidence of postoperative thrombotic complications was 2.76 times higher (OR = 2.76, 95% CI 1.756-4.345, z = 4.40, P < 0.05). Furthermore, the incidence of transfusion during and after surgery was 1.33 times higher (OR = 1.33, 95% CI 1.13-1.56, z = 3.40, P = 0.001 < 0.05), the incidence of postoperative readmission was 1.67 times higher (OR = 1.67, 95% CI 1.24-2.27, z = 3.33, P = 0.001 < 0.05), and the risk of postoperative death was 6.01 times higher (OR = 6.01, 95% CI 4.51-8.01, z = 12.27, P < 0.05). After conducting a publication bias test and Trim-and -Fill method analysis, we found no evidence of publication bias, and the results remained stable. CONCLUSION Preoperative low protein malnutrition is closely related to the incidence of postoperative complications and postoperative status. More prospective multicenter studies should be conducted to validate this conclusion. Furthermore, more effective assessment and intervention of preoperative nutritional status should be carried out to prevent the occurrence of postoperative complications and mortality risk.
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Affiliation(s)
- Yongrong Hu
- Department of Orthopedics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, 610000, China
| | - Liping Wang
- Department of Orthopedics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, 610000, China
| | - Hao Liu
- Department of Orthopedics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, 610000, China
| | - Kunhai Yang
- Department of Orthopedics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, 610000, China
| | - Song Wang
- Department of Orthopedics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, 610000, China
| | - Xiang Zhang
- Department of Orthopedics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, 610000, China
| | - Bo Qu
- Department of Orthopedics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, 610000, China.
| | - Hongsheng Yang
- Department of Orthopedics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, 610000, China.
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13
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Muzyka L, Pugazenthi S, Lavadi RS, Shah D, Patel A, Rangwalla T, Javeed S, Elsayed G, Greenberg JK, Pennicooke B, Agarwal N. Geographic Distribution in Training and Practice of Academic Neurological and Orthopedic Spine Surgeons in the United States. World Neurosurg 2023; 176:e281-e288. [PMID: 37209918 DOI: 10.1016/j.wneu.2023.05.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 05/10/2023] [Accepted: 05/11/2023] [Indexed: 05/22/2023]
Abstract
STUDY DESIGN Cross-sectional study. OBJECTIVE This study aimed to stratify the geographic distribution of academic spine surgeons in the United States, analyzing how this distribution highlights differences in academic, demographic, professional metrics, and gaps in access to spine care. METHODS Spine surgeons were identified using American Association of Neurological Surgeons and American Academy of Orthopedic Surgeons databases, categorizing into geographic regions of training and practice. Departmental websites, National Institutes of Health (NIH) RePort Expenditures and Results, Google Patent, and NIH icite databases were queried for demographic and professional metrics. RESULTS Academic spine surgeons (347 neurological; 314 orthopedic) are predominantly male (95%) and few have patents (23%) or NIH funding (4%). Regionally, the Northeast has the highest proportion per capita (3.28 surgeons per million), but California is the state with the highest proportion (13%). The Northeast has the greatest regional retention post-residency at 74%, followed by the Midwest (59%). The West and South are more associated with additional degrees. Neurosurgery-trained surgeons hold more additional degrees (17%) than orthopedic surgeons (8%), whereas more orthopedic surgeons hold leadership positions (34%) than neurosurgeons (20%). CONCLUSIONS Academic spine surgeons are found at the highest proportion in the Northeast and California; the Northeast has the greatest regional retention. Spine neurosurgeons have more additional degrees, whereas spine orthopedic surgeons have more leadership positions. These results are relevant to training programs looking to correct geographic disparities, surgeons in search of training programs, or students in pursuit of spine surgery.
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Affiliation(s)
- Logan Muzyka
- Department of Neurosurgery, Dell Medical School at The University of Texas at Austin, Austin, Texas, USA
| | - Sangami Pugazenthi
- Department of Neurosurgery, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Raj Swaroop Lavadi
- Department of Neurosurgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Darsh Shah
- Department of Neurosurgery, Dell Medical School at The University of Texas at Austin, Austin, Texas, USA
| | - Arpan Patel
- Department of Neurosurgery, Dell Medical School at The University of Texas at Austin, Austin, Texas, USA
| | - Taiyeb Rangwalla
- Department of Neurosurgery, Dell Medical School at The University of Texas at Austin, Austin, Texas, USA
| | - Saad Javeed
- Department of Neurosurgery, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Galal Elsayed
- Department of Neurosurgery, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Jacob K Greenberg
- Department of Neurosurgery, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Brenton Pennicooke
- Department of Neurosurgery, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Nitin Agarwal
- Department of Neurosurgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA; Department of Neurosurgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA.
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14
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Camacho JE, Kung JE, Thomson AE, Ye IB, Gonzalez N, Usmani MF, Sokolow MJ, Bruckner JJ, Cavanaugh DL, Buraimoh K, Koh EY, Gelb DE, Ludwig SC. Retrospective Analysis of Causes and Risk Factors of 30-Day Readmission After Spine Surgery for Thoracolumbar Trauma. Global Spine J 2023; 13:1558-1565. [PMID: 34569346 PMCID: PMC10448097 DOI: 10.1177/21925682211041045] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
STUDY DESIGN Retrospective Case Series. OBJECTIVE This study aims to evaluate readmission rates, risk factors, and reason for unplanned 30-day readmissions after thoracolumbar spine trauma surgery. METHODS A retrospective chart review was conducted for patients undergoing operative treatment for thoracic or lumbar trauma with open or minimally invasive surgical approach at a Level 1 urban trauma center. Patients were divided into two groups based on 30-day readmission status. Reason for readmission, reoperation rates, injury type, trauma severity, and incidence of polytrauma were compared between the two groups. RESULTS A total of 312 patients, 69.9% male with an average age of 47 ± 19 years were included. The readmitted group included 16 patients (5.1%) of which 9 (56%) were readmitted for medical complications and 7 for surgical complications. Wound complications (31.3% of readmissions) were the most common cause of readmission, followed by non-wound related sepsis (18.9% of readmissions). A total of 6 patients (37.5%) required reoperation; 2 instrumentation failures underwent revision surgery, and 4 wound complications underwent irrigation and debridement. Patients with higher Injury Severity Scale (ISS) were more likely to be readmitted (27.8% vs 22.1%, P = .045). Concomitant lower limb surgery increased odds of readmission (OR, 4.40; 95% CI, 1.10-17.83; P = .037). CONCLUSION Spine trauma 30-day readmission rate was 5.1%, comparable to those reported in the elective spine surgery literature. Readmitted patients were more likely to sustain concomitant operative lower limb trauma. Wound complications were the most common cause of readmission, and almost half of the patients were readmitted due to surgery-related complications.
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Affiliation(s)
- Jael E. Camacho
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Justin E. Kung
- University of Maryland School of Medicine, Baltimore, MD, USA
| | - Alexandra E. Thomson
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Ivan B. Ye
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Nicolas Gonzalez
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - M F. Usmani
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Michael J Sokolow
- Business Intelligence and Regulatory Policy, University of Maryland Medical System, Baltimore, MD, USA
| | - Jacob J Bruckner
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Daniel L. Cavanaugh
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Kendall Buraimoh
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Eugene Y Koh
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Daniel E Gelb
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Steven C Ludwig
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
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15
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Shah V, Rodrigues AJ, Malhotra S, Johnstone T, Varshneya K, Haider G, Stienen MN, Veeravagu A. Clinical Outcomes and Cost Differences Between Patients Undergoing Primary Anterior Cervical Discectomy and Fusion Procedures with Private or Medicare Insurance: A Propensity Score-Matched Study. World Neurosurg 2023; 173:e669-e676. [PMID: 36871653 DOI: 10.1016/j.wneu.2023.02.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 02/24/2023] [Accepted: 02/25/2023] [Indexed: 03/07/2023]
Abstract
OBJECTIVE We assessed whether the insurance type reflects a patient's quality of care after an anterior discectomy and fusion (ACDF) procedure by comparing differences in the postoperative complications, readmission rates, reoperation rates, lengths of hospital stay, and cost of treatment between patients with Medicare versus private insurance. METHODS Propensity score matching was used to match patient cohorts insured by Medicare and private insurance in the MarketScan Commercial Claims and Encounters Database (2007-2016). Age, sex, year of operation, geographic region, comorbidities, and operative factors were used to match cohorts of patients who had undergone an ACDF procedure. RESULTS A total of 110,911 patients met the inclusion criteria. Of these patients, 97,543 patients (87.9%) were privately insured and 13,368 patients (12.1%) were insured by Medicare. The propensity score matching algorithm matched 7026 privately insured patients to 7026 Medicare patients. After matching, no significant differences were found in the 90-day postoperative complication rates, lengths of stay, or reoperation rates between the Medicare and privately insured cohorts. The Medicare group had had lower postoperative readmission rates for all time points: 30 days (1.8% vs. 4.6%; P < 0.001), 60 days (2.5% vs. 6.3%; P < 0.001), and 90 days (4.2% vs. 7.7%; P < 0.001). The median payment to physicians was significantly lower for the Medicare group ($3885 vs. $5601; P < 0.001). CONCLUSIONS In the present study, propensity score matched patients covered by Medicare and private insurance who had undergone an ACDF procedure had had similar treatment outcomes.
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Affiliation(s)
- Vaibhavi Shah
- Neurosurgical Artificial Intelligence and Machine Learning Laboratory, Department of Neurosurgery, Stanford University School of Medicine, Stanford, California, USA
| | - Adrian J Rodrigues
- Neurosurgical Artificial Intelligence and Machine Learning Laboratory, Department of Neurosurgery, Stanford University School of Medicine, Stanford, California, USA
| | - Shreya Malhotra
- Neurosurgical Artificial Intelligence and Machine Learning Laboratory, Department of Neurosurgery, Stanford University School of Medicine, Stanford, California, USA
| | - Thomas Johnstone
- Neurosurgical Artificial Intelligence and Machine Learning Laboratory, Department of Neurosurgery, Stanford University School of Medicine, Stanford, California, USA
| | - Kunal Varshneya
- Neurosurgical Artificial Intelligence and Machine Learning Laboratory, Department of Neurosurgery, Stanford University School of Medicine, Stanford, California, USA
| | - Ghani Haider
- Neurosurgical Artificial Intelligence and Machine Learning Laboratory, Department of Neurosurgery, Stanford University School of Medicine, Stanford, California, USA
| | - Martin N Stienen
- Department of Neurosurgery, Spine Center of Eastern Switzerland, St. Gallen, Switzerland
| | - Anand Veeravagu
- Neurosurgical Artificial Intelligence and Machine Learning Laboratory, Department of Neurosurgery, Stanford University School of Medicine, Stanford, California, USA.
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16
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Wang DP, Hu HS, Zheng XZ, Lei XL, Guo HH, Liao WQ, Wang J. Risk Factors for Thirty-Day Readmission Following Lumbar Surgery: A Meta-Analysis. World Neurosurg 2023; 172:e467-e475. [PMID: 36682531 DOI: 10.1016/j.wneu.2023.01.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 01/13/2023] [Accepted: 01/14/2023] [Indexed: 01/21/2023]
Abstract
OBJECTIVE Thirty-day readmission is one of the common complications after lumbar surgery. More 30-day readmission increases the total hospitalization, economic burden, and physical pain of patients, delays the progress of postoperative rehabilitation, and even lead to die. Therefore, it is necessary to analyze the risk factors of 30-day readmission following lumbar surgery. METHODS We searched for all the clinical trials published from the establishment of the database to May 1, 2022 through the Cochrane Library, Web of Science, Embase, and PubMed. Data including age, American Society of Anesthesiology physical status class, preoperative hematocrit (Hct), diabetes mellitus (DM), current smoker, chronic obstructive pulmonary disease (COPD), length of hospital stay (LHS), operation time, and surgical site infection (SSI) were extracted. We used Review Manager 5.4 for data analysis. RESULTS Six studies with 30,989 participants were eligible for this meta-analysis. The analysis revealed that there were statistically significant differences in the age (95% confidence interval [CI]: -3.35-2.90, P < 0.001), preoperative Hct (95% CI: 0.75-1.33, P < 0.001), DM (95% CI: 0.56-0.74, P < 0.001), COPD (95% CI: 0.38-0.58, P < 0.001), operation time (95% CI: -35.54-16.18, P < 0.001), LHS (95% CI: -0.54-0.50, P < 0.001), and SSI (95% CI: 0.02-0.03, P < 0.001) between no readmission and readmission groups. In terms of the American Society of Anesthesiology physical status class and current smoker, there was no significant effect on the 30-day readmission (P = 0.16 and P = 0.35 respectively). CONCLUSIONS Age, preoperative Hct, DM, COPD, operation time, LHS, and SSI are the danger factors of 30-day readmission following lumbar surgery.
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Affiliation(s)
- Dong Ping Wang
- Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Hao Shi Hu
- Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Xin Ze Zheng
- Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Xiao Ling Lei
- Department of Physical Medicine and Rehabilitation, Hubei Provincial Hospital of Integrated Chinese and Western Medicine, Wuhan, Hubei, China
| | - Hao Hua Guo
- Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Wen Qing Liao
- Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Jian Wang
- Department of Orthopedics, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, Guangdong, China.
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17
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Chen LY, Chang Y, Wong CE, Chi KY, Lee JS, Huang CC, Lee PH. Risk Factors for 30-day Unplanned Readmission following Surgery for Lumbar Degenerative Diseases: A Systematic Review. Global Spine J 2023; 13:563-574. [PMID: 36040160 PMCID: PMC9972270 DOI: 10.1177/21925682221116823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
STUDY DESIGN Systematic review. OBJECTIVES Surgical procedures for lumbar degenerative diseases (LDD), which have emerged in the 21-century, are commonly practiced worldwide. Regarding financial burdens and health costs, readmissions within 30days following surgery are inconvenient. We performed a systematic review to integrate real-world evidence and report the current risk factors associated with 30-day readmission following surgery for LDD. METHODS The Cochrane Library, Embase, and Medline electronic databases were searched from inception to April 2022 to identify relevant studies reporting risk factors for 30-day readmission following surgery for LDD. RESULTS Thirty-six studies were included in the review. Potential risk factors were identified in the included studies that reported multivariate analysis results, including age, race, obesity, higher American Society of Anesthesiologists score, anemia, bleeding disorder, chronic pulmonary disease, heart failure, dependent status, depression, diabetes, frailty, malnutrition, chronic steroid use, surgeries with anterior approach, multilevel spinal surgeries, perioperative transfusion, presence of postoperative complications, prolonged operative time, and prolonged length of stay. CONCLUSIONS There are several potential perioperative risk factors associated with unplanned readmission following surgery for LDD. Preoperatively identifying patients that are at increased risk of readmission is critical for achieving the best possible outcomes.
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Affiliation(s)
- Liang-Yi Chen
- Section of Neurosurgery, Department
of Surgery, College of Medicine, National Cheng Kung University, National Cheng Kung University
Hospital, Tainan, Taiwan
| | - Yu Chang
- Section of Neurosurgery, Department
of Surgery, College of Medicine, National Cheng Kung University, National Cheng Kung University
Hospital, Tainan, Taiwan
| | - Chia-En Wong
- Section of Neurosurgery, Department
of Surgery, College of Medicine, National Cheng Kung University, National Cheng Kung University
Hospital, Tainan, Taiwan
| | - Kuan-Yu Chi
- Department of Education, Center for
Evidence-Based Medicine, Taipei Medical University
Hospital, Taipei, Taiwan
| | - Jung-Shun Lee
- Institute of Basic Medical
Sciences, College of Medicine, National Cheng Kung
University, Tainan, Taiwan,Department of Cell Biology and
Anatomy, College of Medicine, National Cheng Kung
University, Tainan, Taiwan
| | - Chi-Chen Huang
- Section of Neurosurgery, Department
of Surgery, College of Medicine, National Cheng Kung University, National Cheng Kung University
Hospital, Tainan, Taiwan,Chi-Chen Huang, Attending Doctor, Section
of Neurosurgery, Department of Surgery, National Cheng Kung University Hospital,
College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan.
| | - Po-Hsuan Lee
- Section of Neurosurgery, Department
of Surgery, College of Medicine, National Cheng Kung University, National Cheng Kung University
Hospital, Tainan, Taiwan,Po-Hsuan Lee, Attending Doctor, Section of
Neurosurgery, Department of Surgery, National Cheng Kung University Hospital,
College of Medicine, National Cheng Kung University, No. 138, Shengli Rd, North
District, Tainan 704, Taiwan.
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18
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Ham CH, Kwon WK, Moon HJ, Kim JH, Park YK, Hofstetter CP. Use of prophylactic perioperative antibiotics for lumbar spinal fusions: A nationwide population-based cohort study. J Infect Public Health 2023; 16:354-360. [PMID: 36682101 DOI: 10.1016/j.jiph.2023.01.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/28/2022] [Accepted: 01/08/2023] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Perioperative prophylactic antibiotic (PPA) use in spine surgery is known to reduce the rate of surgical site infections. In the past decade, several evidence-based guidelines have been published and surveillance systems to monitor the proper use of antimicrobials had been adapted by many institutes. OBJECTIVE To report the trends of PPA prescription in lumbar fusion surgeries nationwide in the Republic of Korea. METHODS This is a nationwide registry study. Using the population-based data from the Republic of Korea provided by the Korean Health Insurance Review and Assessment Service, data of all lumbar spinal fusion surgeries performed between 2010 and 2018 in adult patients (age ≥19 years) were reviewed. RESULTS The most frequently used antibiotics were first-generation cephalosporins, which accounted for 38.2 % of total PPA prescriptions and were prescribed in 58.96 % of lumbar fusion surgeries. A gradual increase in prescription trends was observed. The second most frequently used PPAs were second-generation cephalosporins, which showed decrease in use from 2016. The frequency of vancomycin prescriptions gradually increased over the observation period and showed an almost four-fold increase in 2018 compared to 2010. First- and second-generation cephalosporins were prescribed less frequently to patients with renal disease. CONCLUSION The pattern of PPA use has changed remarkably over the observation period. Furthermore, specific differences in PPA prescriptions were observed among patients with certain co-morbidities.
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Affiliation(s)
- Chang Hwa Ham
- Department of Neurosurgery, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Woo-Keun Kwon
- Department of Neurosurgery, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Republic of Korea.
| | - Hong Joo Moon
- Department of Neurosurgery, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Republic of Korea; Department of Orthopaedic Surgery, Washington University in St.Louise, MO, USA
| | - Joo Han Kim
- Department of Neurosurgery, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Youn-Kwan Park
- Department of Neurosurgery, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Republic of Korea
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19
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Mostofi K, Peyravi M. Surgical site infection after implantation of floating lumbar interlaminar device. J Hosp Infect 2023; 132:143-144. [PMID: 36435308 DOI: 10.1016/j.jhin.2022.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 11/15/2022] [Accepted: 11/19/2022] [Indexed: 11/25/2022]
Affiliation(s)
- K Mostofi
- Centre Clinical, Department of Neurosurgery, Centre Clinical, Chirurgie de Rachis, Soyaux, France.
| | - M Peyravi
- Department of Neurosurgery, Carl-Thiem-Klinikum, Academic Teaching Hospital of Charity Medical University of Berlin, Berlin, Germany
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20
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Surgical site infection in thoracic and lumbar fractures: incidence and risk factors in 11,401 patients from a nationwide administrative database. Spine J 2023; 23:281-286. [PMID: 36283652 DOI: 10.1016/j.spinee.2022.10.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 10/09/2022] [Accepted: 10/17/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND CONTEXT The rate of surgical site infection (SSI) following elective spine surgery ranges from 0.5%‒10%. Published reports suggest a higher SSI rate in non-elective spine surgery such as spine trauma; however, there is a paucity of large database studies examining this issue. PURPOSE The objective of this study was to investigate the incidence and risk factors of SSI in patients undergoing spine surgery for thoracic and lumbar fractures in a large population database. STUDY DESIGN/SETTING This is a retrospective study utilizing the PearlDiver Patient Claims Database. PATIENT SAMPLE Patients undergoing spine surgery for thoracic and lumbar fractures between 2015-2020 were identified in the PearlDiver Patient Claims Database using ICD-10 codes. Patients were excluded who had another surgery either 14 days before or 21 days after the index spine surgery, or pathologic fracture. OUTCOME MEASURES Rate of surgical site infection. METHODS Clinical data collected from the PearlDiver database based on ICD-10 codes included gender, age, diabetes, smoking status, obesity, Elixhauser Comorbidity Index (ECI), Charlson Comorbidity Index (CCI), and SSI. Univariate analysis was used to assess the association of potential risk factors and SSI. Multivariable analysis was used to identify independent risk factors of SSI. The authors have no conflicts of interest or funding sources to declare. RESULTS A total of 11,401 patients undergoing spine surgery for thoracic and lumbar fractures met inclusion criteria, and 1,065 patients were excluded. 860 patients developed SSI (7.5%). Risk factors significantly associated with SSI in univariate analysis included diabetes (OR 1.50; 95% CI, 1.30‒1.73; p<.001), obesity (OR 1.66; 95% CI, 1.44‒1.92; p<.001), increased age (p<.001), ECI (p<.001), and CCI (p<.001). On multivariable analysis, obesity and ECI were independently associated with SSI (p<.001 and p<.001, respectively). CONCLUSIONS Non-elective surgery for thoracic and lumbar fractures is associated with a 7.5% risk of SSI. Obesity and ECI are independent predictors of SSI in this population. Limitations include the reliance on accurate insurance coding which may not fully capture all SSI, and in particular superficial SSI. These findings provide a broad overview of the risk of SSI in this population at a national level and may also help counsel patients regarding risk.
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21
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Tong C, Shen Y, Zhu H, Zheng J, Xu Y, Wu J. Continuous Relationship of Operative Duration with Risk of Adverse Perioperative Outcomes and Early Discharge Undergoing Thoracoscopic Lung Cancer Surgery. Cancers (Basel) 2023; 15:cancers15020371. [PMID: 36672321 PMCID: PMC9856387 DOI: 10.3390/cancers15020371] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/20/2022] [Accepted: 12/28/2022] [Indexed: 01/08/2023] Open
Abstract
Background: For thoracoscopic lung cancer surgery, the continuous relationship and the trigger point of operative duration with a risk of adverse perioperative outcomes (APOs) and early discharge remain unknown. Methods: This study enrolled 12,392 patients who underwent this surgical treatment. Five groups were stratified by operative duration: <60 min, 60−120 min, 120−180 min, 180−240 min, and ≥240 min. APOs included intraoperative hypoxemia, delayed extubation, postoperative pulmonary complications (PPCs), prolonged air leakage (PAL), postoperative atrial fibrillation (POAF), and transfusion. A restricted cubic spline (RCS) plot was used to characterize the continuous relationship of operative duration with the risk of APOs and early discharge. Results: The risks of the aforementioned APOs increased with each additional hour after the first hour. A J-shaped association with APOs was observed, with a higher risk in those with prolonged operative duration compared with those with shorter values. However, the probability of early discharge decreased from 0.465 to 0.350, 0.217, and 0.227 for each additional hour of operative duration compared with counterparts (<60 min), showing an inverse J-shaped association. The 90 min procedure appears to be a tipping point for a sharp increase in APOs and a significant reduction in early discharge. Conclusions: Our findings have important and meaningful implications for risk predictions and clinical interventions, and early rehabilitation, for APOs.
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Affiliation(s)
- Chaoyang Tong
- Department of Anesthesiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200052, China
- Department of Anesthesiology, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Yaofeng Shen
- Department of Anesthesiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200052, China
| | - Hongwei Zhu
- Department of Anesthesiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200052, China
| | - Jijian Zheng
- Department of Anesthesiology, Shanghai Children’s Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
- Correspondence: (J.Z.); (J.W.)
| | - Yuanyuan Xu
- Department of Lung Cancer Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Jingxiang Wu
- Department of Anesthesiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200052, China
- Correspondence: (J.Z.); (J.W.)
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22
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Patel V, Metz A, Schultz L, Nerenz D, Park P, Chang V, Schwalb J, Khalil J, Perez-Cruet M, Aleem I. Rates and reasons for reoperation within 30 and 90 days following cervical spine surgery: a retrospective cohort analysis of the Michigan Spine Surgery Improvement Collaborative (MSSIC) registry. Spine J 2023; 23:116-123. [PMID: 36152774 DOI: 10.1016/j.spinee.2022.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 07/16/2022] [Accepted: 09/13/2022] [Indexed: 02/08/2023]
Abstract
BACKGROUND CONTEXT Reoperation following cervical spinal surgery negatively impacts patient outcomes and increases health care system burden. To date, most studies have evaluated reoperations within 30 days after spine surgery and have been limited in scope and focus. Evaluation within the 90-day period, however, allows a more comprehensive assessment of factors associated with reoperation. PURPOSE The purpose of this study is to assess the rates and reasons for reoperations after cervical spine surgery within 30 and 90 days. DESIGN We performed a retrospective analysis of a state-wide prospective, multi-center, spine-specific database of patients surgically treated for degenerative disease. PATIENT SAMPLE Patients 18 years of age or older who underwent cervical spine surgery for degenerative pathologies from February 2014 to May 2019. Operative criteria included all degenerative cervical spine procedures, including those with cervical fusions with contiguous extension down to T3. OUTCOME MEASURES We determined causes for reoperation and independent surgical and demographic risk factors impacting reoperation. METHODS Patient-specific and surgery-specific data was extracted from the registry using ICD-10-DM codes. Reoperations data was obtained through abstraction of medical records through 90 days. Univariate analysis was done using chi-square tests for categorical variables, t-tests for normally distributed variables, and Wilcoxon rank-sum tests for variables with skewed distributions. Odds ratios for return to the operating room (OR) were evaluated in multivariate analysis. RESULTS A total of 13,435 and 13,440 patients underwent cervical spine surgery and were included in the 30 and 90-day analysis, respectively. The overall reoperation rate was 1.24% and 3.30% within 30 and 90 days, respectively. Multivariate analysis showed within 30 days, procedures involving four or more levels, posterior only approach, and longer length of stay had increased odds of returning to the OR (p<.05), whereas private insurance had a decreased odds of return to OR (p<.05). Within 90 days, male sex, coronary artery disease (CAD), previous spine surgery, procedures with 4 or more levels, and longer length of stay had significantly increased odds of returning to the OR (p<.05). Non-white race, independent ambulatory status pre-operatively, and having private insurance had decreased odds of return to the OR (p<.05). The most common specified reasons for return to the OR within 30 days was hematoma (19%), infection (17%), and wound dehiscence (11%). Within 90 days, reoperation reasons were pain (10%), infection (9%), and hematoma (8%). CONCLUSION Reoperation rates after elective cervical spine surgery are 1.24% and 3.30% within 30 and 90 days, respectively. Within 30 days, four or more levels, posterior approach, and longer length of stay were risk factors for reoperation. Within 90 days, male sex, CAD, four or more levels, and longer length of hospital stay were risk factors for reoperation. Non-white demographic and independent preoperative ambulatory status were associated with decreased reoperation rates.
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Affiliation(s)
- Vandan Patel
- University of Michigan Department of Orthopedic Surgery
| | - Allan Metz
- University of Michigan Department of Orthopedic Surgery
| | | | | | - Paul Park
- University of Michigan Department of Neurosurgery
| | | | | | | | | | - Ilyas Aleem
- University of Michigan Department of Orthopedic Surgery.
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23
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Dexter E, Attwood K, Demmy T, Yendamuri S. Does Operative Duration of Lobectomy for Early Lung Cancer Increase Perioperative Morbidity? Ann Thorac Surg 2022; 114:941-947. [PMID: 35183506 PMCID: PMC9381650 DOI: 10.1016/j.athoracsur.2022.01.040] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 12/22/2021] [Accepted: 01/25/2022] [Indexed: 11/01/2022]
Abstract
BACKGROUND Longer bariatric, colorectal, plastic, spine, and urologic operations increase complications and lengths of stay. We aimed to determine whether this is a risk factor for lung lobectomy morbidity. METHODS The Society of Thoracic Surgeons General Thoracic Surgery Database was queried for early-stage non-small cell lung cancer lobectomy with surgical duration treated as a continuous variable. Univariate and multivariate analyses compared patient and clinical characteristics with perioperative outcomes and procedure durations. Robotic cases were combined with thoracoscopic cases for duration analyses into a minimally invasive group. All analyses were conducted in SAS v9.4 (SAS Institute, Cary, NC) at a significance level of .05. RESULTS In 17,852 patients mean duration of thoracotomy, thoracoscopy, and robotic lobectomies were 178 ± 84, 185 ± 73, and 214 ± 82 minutes, respectively (P < .001). The most common complications were prolonged air leak (12.3%), atrial fibrillation (12%), pneumonia (4.4%), and atelectasis requiring bronchoscopy (4.1%). Procedure duration was associated with increased odds of intraoperative packed red blood cell transfusion (P < .001) and length of stay > 5 days (P < .001) for both thoracotomy and minimally invasive lobectomy. Increased odds of pneumonia (P < .001), atelectasis (P < .001), and unexpected intensive care unit admission (P = .006) for thoracotomy lobectomy were associated with longer procedure duration. Increased lobectomy duration was not associated with readmission (P = .549) or 30-day mortality (P = .208). CONCLUSIONS Longer early-stage lung cancer lobectomy durations are associated with postoperative morbidity and increased length of stay. Although the effects of protracted operation times on long-term survival are unknown, short-term mortality differences were not detected. Measures that decrease operative durations without sacrificing safety and oncologic outcome should be undertaken by surgeons and hospital systems.
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Affiliation(s)
- Elisabeth Dexter
- Department of Thoracic Surgery, Roswell Park Comprehensive Cancer Center, Buffalo, New York; Department of Surgery, SUNY University at Buffalo, Buffalo, New York.
| | - Kristopher Attwood
- Department of Biostatistics and Bioinformatics, Roswell Park Comprehensive Cancer Center, Buffalo, New York; Department of Biostatistics, SUNY University at Buffalo, Buffalo, New York
| | - Todd Demmy
- Department of Thoracic Surgery, Roswell Park Comprehensive Cancer Center, Buffalo, New York; Department of Surgery, SUNY University at Buffalo, Buffalo, New York
| | - Sai Yendamuri
- Department of Thoracic Surgery, Roswell Park Comprehensive Cancer Center, Buffalo, New York; Department of Surgery, SUNY University at Buffalo, Buffalo, New York
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24
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Crutchfield CR, Zhong JR, Lee NJ, Fortney TA, Ahmad CS, Lynch TS. Operative Time Less Than 1.5 Hours, Male Sex, Dependent Functional Status, Presence of Dyspnea, and Reoperations Within 30 days Are Independent Risk Factors for Readmission After ACLR. Arthrosc Sports Med Rehabil 2022; 4:e1305-e1313. [PMID: 36033184 PMCID: PMC9402418 DOI: 10.1016/j.asmr.2022.04.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 03/10/2022] [Accepted: 04/12/2022] [Indexed: 12/03/2022] Open
Abstract
Purpose The purposes of this study are to use a large, patient-centered database to describe the 30-day readmission rate and to identify predictive risk factors for readmission after elective isolated ACLR. Methods The National Surgical Quality Improvement Program Database was retrospectively queried for isolated ACLR procedures between 2011 and 2017. Current Procedural Terminology (CPT) codes were used to identify isolated ACLR patients. Those undergoing additional procedures such as meniscectomy or multi-ligamentous reconstruction were excluded. Readmissions were analyzed against demographic variables with bivariate analysis. Multivariate logistic regression was used to find independent risk factors for 30-day readmissions after ACLR. Results A total of 11,060 patients (37.2% female) were included with an average age of 32.2 ± 10.6 years and mean body mass index (BMI) of 27.9 ± 6.5 kg/m2 (29.2% were >30). The overall readmission rate was 0.59%. The most reported reason for readmission was infection 0.22 (24 out of 11,060). The following variables were associated with significantly higher readmission rates: male sex (P = .001), history of severe chronic obstructive pulmonary disease (COPD) (P = .025), cardiac comorbidity (P = .034), operative time >1.5 hours (P <.001), partially dependent functional health status (P = .002), high preoperative creatinine (P = .009), normal preoperative albumin (P = .020), hypertension (P = .034), and reoperations (P < .001). Operative time >1.5 hours, male sex, dependent functional status, the presence of dyspnea, and undergoing a reoperation were identified as independent risk factors for 30-day readmissions (P < .05 for all). Conclusions Isolated ACLR is associated with low 30-day readmission rates. Operative time >1.5 hours, male sex, dependent functional status, the presence of dyspnea, and 30-day reoperations are independent risk factors for readmission that should be considered in patient selection and addressed with preoperative counseling. Level of Evidence Level III, retrospective cohort study.
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25
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Karamian BA, Mao J, Toci GR, Lambrechts MJ, Canseco JA, Qureshi MA, Silveri O, Minetos PD, Jallo JI, Prasad S, Heller JE, Sharan AD, Harrop JS, Woods BI, Kaye ID, Hilibrand A, Kepler CK, Vaccaro AR, Schroeder GD. Clinical Outcomes at One-year Follow-up for Patients With Surgical Site Infection After Spinal Fusion. Spine (Phila Pa 1976) 2022; 47:1055-1061. [PMID: 35797595 DOI: 10.1097/brs.0000000000004394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 01/04/2022] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Retrospective case-control study. OBJECTIVE To compare health-related quality of life outcomes at one-year follow-up between patients who did and did not develop surgical site infection (SSI) after thoracolumbar spinal fusion. SUMMARY OF BACKGROUND DATA SSI is among the most common healthcare-associated complications. As healthcare systems increasingly emphasize the value of delivered care, there is an increased need to understand the clinical impact of SSIs. MATERIALS AND METHODS A retrospective 3:1 (control:SSI) propensity-matched case-control study was conducted for adult patients who underwent thoracolumbar fusion from March 2014 to January 2020 at a single academic institution. Exclusion criteria included less than 18 years of age, incomplete preoperative and one-year postoperative patient-reported outcome measures, and revision surgery. Continuous and categorical data were compared via independent t tests and χ 2 tests, respectively. Intragroup analysis was performed using paired t tests. Regression analysis for ∆ patient-reported outcome measures (postoperative minus preoperative scores) controlled for demographics. The α was set at 0.05. RESULTS A total of 140 patients (105 control, 35 SSI) were included in final analysis. The infections group had a higher rate of readmission (100% vs. 0.95%, P <0.001) and revision surgery (28.6% vs. 12.4%, P =0.048). Both groups improved significantly in Physical Component Score (control: P =0.013, SSI: P =0.039), Oswestry Disability Index (control: P <0.001, SSI: P =0.001), Visual Analog Scale (VAS) Back (both, P <0.001), and VAS Leg (control: P <0.001, SSI: P =0.030). Only the control group improved in Mental Component Score ( P <0.001 vs. SSI: P =0.228), but history of a SSI did not affect one-year improvement in ∆MCS-12 ( P =0.455) on regression analysis. VAS Leg improved significantly less in the infection group (-1.87 vs. -3.59, P =0.039), which was not significant after regression analysis (β=1.75, P =0.050). CONCLUSION Development of SSI after thoracolumbar fusion resulted in increased revision rates but did not influence patient improvement in one-year pain, functional disability, or physical and mental health status.
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Affiliation(s)
- Brian A Karamian
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA
| | - Jennifer Mao
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA
| | - Gregory R Toci
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA
| | - Mark J Lambrechts
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA
| | - Jose A Canseco
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA
| | - Mahir A Qureshi
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA
| | - Olivia Silveri
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA
| | - Paul D Minetos
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA
| | - Jack I Jallo
- Department of Neurological Surgery, Thomas Jefferson University, Philadelphia, PA
| | - Srinivas Prasad
- Department of Neurological Surgery, Thomas Jefferson University, Philadelphia, PA
| | - Joshua E Heller
- Department of Neurological Surgery, Thomas Jefferson University, Philadelphia, PA
| | - Ashwini D Sharan
- Department of Neurological Surgery, Thomas Jefferson University, Philadelphia, PA
| | - James S Harrop
- Department of Neurological Surgery, Thomas Jefferson University, Philadelphia, PA
| | - Barrett I Woods
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA
| | - Ian David Kaye
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA
| | - Alan Hilibrand
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA
| | - Christopher K Kepler
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA
| | - Alexander R Vaccaro
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA
| | - Gregory D Schroeder
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA
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26
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Shah NV, Lavian JD, Moattari CR, Eldib H, Beyer GA, Mai DH, Challier V, Passias PG, Lafage R, Lafage V, Schwab FJ, Paulino CB, Diebo BG. The Impact of Isolated Baseline Cannabis Use on Outcomes Following Thoracolumbar Spinal Fusion: A Propensity Score-Matched Analysis. THE IOWA ORTHOPAEDIC JOURNAL 2022; 42:57-62. [PMID: 35821925 PMCID: PMC9210439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
BACKGROUND There is limited literature evaluating the impact of isolated cannabis use on outcomes for patients following spinal surgery. This study sought to compare 90-day complication, 90-day readmission, as well as 2-year revision rates between baseline cannabis users and non-users following thoracolumbar spinal fusion (TLF) for adult spinal deformity (ASD). METHODS The New York Statewide Planning and Research Cooperative System (SPARCS) database was queried between January 2009 and September 2013 to identify all patients who underwent TLF for ASD. Inclusion criteria were age ≥18 years and either minimum 90-day (for complications and readmissions) or 2-year (for revisions) follow-up surveillance. Cohorts were created and propensity score-matched based on presence or absence of isolated baseline cannabis use. Baseline demographics, hospital-related parameters, 90-day complications and readmissions, and two-year revisions were retrieved. Multivariate binary stepwise logistic regression identified independent outcome predictors. RESULTS 704 patients were identified (n=352 each), with comparable age, sex, race, primary insurance, Charlson/Deyo scores, surgical approach, and levels fused between cohorts (all, p>0.05). Cannabis users (versus non-users) incurred lower 90-day overall and medical complication rates (2.4% vs. 4.8%, p=0.013; 2.0% vs. 4.1%, p=0.018). Cohorts had otherwise comparable complication, revision, and readmission rates (p>0.05). Baseline cannabis use was associated with a lower risk of 90-day medical complications (OR=0.47, p=0.005). Isolated baseline cannabis use was not associated with 90-day surgical complications and readmissions, or two-year revisions. CONCLUSION Isolated baseline cannabis use, in the absence of any other diagnosed substance abuse disorders, was not associated with increased odds of 90-day surgical complications or readmissions or two-year revisions, though its use was associated with reduced odds of 90-day medical complications when compared to non-users undergoing TLF for ASD. Further investigations are warranted to identify the physiologic mechanisms underlying these findings. Level of Evidence: III.
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Affiliation(s)
- Neil V. Shah
- Department of Orthopaedic Surgery and Rehabilitation Medicine, The State University of New York Downstate Health Sciences University, Brooklyn, New York, USA
| | - Joshua D. Lavian
- Department of Orthopaedic Surgery and Rehabilitation Medicine, The State University of New York Downstate Health Sciences University, Brooklyn, New York, USA
| | - Cameron R. Moattari
- Department of Orthopaedic Surgery and Rehabilitation Medicine, The State University of New York Downstate Health Sciences University, Brooklyn, New York, USA
| | - Hassan Eldib
- Department of Orthopaedic Surgery and Rehabilitation Medicine, The State University of New York Downstate Health Sciences University, Brooklyn, New York, USA
| | - George A. Beyer
- Department of Orthopaedic Surgery and Rehabilitation Medicine, The State University of New York Downstate Health Sciences University, Brooklyn, New York, USA
| | - David H. Mai
- Department of Orthopaedic Surgery and Rehabilitation Medicine, The State University of New York Downstate Health Sciences University, Brooklyn, New York, USA
| | - Vincent Challier
- Spine Unit 1, Orthopedic Surgery Department, Bordeaux University Hospital, Bordeaux, France
| | - Peter G. Passias
- Department of Orthopedic Surgery, NYU Langone Orthopedic Hospital, New York, New York, USA
| | - Renaud Lafage
- Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York, USA
| | - Virginie Lafage
- Department of Orthopaedic Surgery, Lenox Hill Hospital, Northwell Health, New York, New York, USA
| | - Frank J. Schwab
- Department of Orthopaedic Surgery, Lenox Hill Hospital, Northwell Health, New York, New York, USA
| | - Carl B. Paulino
- Department of Orthopaedic Surgery and Rehabilitation Medicine, The State University of New York Downstate Health Sciences University, Brooklyn, New York, USA
- Department of Orthopaedic Surgery, New York-Presbyterian Brooklyn Methodist Hospital, Brooklyn, New York, USA
| | - Bassel G. Diebo
- Department of Orthopaedic Surgery and Rehabilitation Medicine, The State University of New York Downstate Health Sciences University, Brooklyn, New York, USA
- Department of Orthopaedic Surgery, Warren Alpert School of Medicine, Brown University, Providence, Rhode Island, USA
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Taliaferro K, Rao A, Theologis AA, Cummins D, Callahan M, Berven SH. Rates and risk factors associated with 30- and 90-day readmissions and reoperations after spinal fusions for adult lumbar degenerative pathology and spinal deformity. Spine Deform 2022; 10:625-637. [PMID: 34846718 DOI: 10.1007/s43390-021-00446-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 11/13/2021] [Indexed: 12/14/2022]
Abstract
PURPOSE Analyze state databases to determine variables associated with of short-term readmissions and reoperations following thoracolumbar spine fusions for degenerative pathology and spinal deformity. METHODS Retrospective study of State Inpatient Database (2005-13, CA, NE, NY, FL, NC, UT). INCLUSION CRITERIA age > 45 years, diagnosis of degenerative spinal deformity, ≥ 3 level posterolateral lumbar spine fusion. EXCLUSION CRITERIA revision surgery, cervical fusions, trauma, and cancer. Univariate and step-wise multivariate logistic regression analyses were performed to identify independent variables associated with of 30- and 90-day readmissions and reoperations. RESULTS 12,641 patients were included. All-cause 30- and 90-day readmission rates were 14.6% and 21.1%, respectively. 90-day readmissions were associated with: age > 80 (OR: 1.42), 8 + level fusions (OR: 1.19), hospital length of stay (LOS) > 7 days (OR: 1.43), obesity (OR: 1.29), morbid obesity (OR: 1.66), academic hospital (OR: 1.13), cancer history (OR:1.21), drug abuse (OR: 1.31), increased Charlson Comorbidity index (OR: 1.12), and depression (OR: 1.20). Private insurance (OR: 0.64) and lumbar-only fusions (OR: 0.87) were not associated with 90-day readmissions. All-cause 30- and 90-day reoperation rates were 1.8% and 4.2%, respectively. Variables associated with 90-day reoperations were 8 + level fusions (OR: 1.28), LOS > 7 days (OR: 1.43), drug abuse (OR: 1.68), osteoporosis (OR: 1.26), and depression (OR: 1.23). Circumferential fusion (OR: 0.58) and lumbar-only fusions (OR: 0.68) were not associated with 90-day reoperations. CONCLUSIONS 30- and 90-day readmission and reoperation rates in thoracolumbar fusions for adult degenerative pathology and spinal deformity may have been underreported in previously published smaller studies. Identification of modifiable risk factors is important for improving quality of care through preoperative optimization.
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Affiliation(s)
- Kevin Taliaferro
- Department of Orthopaedic Surgery, University of California-San Francisco (UCSF), 500 Parnassus Avenue, MU West 3rd Floor Rm 321, San Francisco, CA, USA
- Department of Orthopaedic Surgery, Henry Ford Hospital, Detroit, MI, USA
| | - Aditya Rao
- Department of Orthopaedic Surgery, University of California-San Francisco (UCSF), 500 Parnassus Avenue, MU West 3rd Floor Rm 321, San Francisco, CA, USA
| | - Alekos A Theologis
- Department of Orthopaedic Surgery, University of California-San Francisco (UCSF), 500 Parnassus Avenue, MU West 3rd Floor Rm 321, San Francisco, CA, USA
| | - Daniel Cummins
- Department of Orthopaedic Surgery, University of California-San Francisco (UCSF), 500 Parnassus Avenue, MU West 3rd Floor Rm 321, San Francisco, CA, USA
| | - Matthew Callahan
- Department of Orthopaedic Surgery, University of California-San Francisco (UCSF), 500 Parnassus Avenue, MU West 3rd Floor Rm 321, San Francisco, CA, USA
| | - Sigurd H Berven
- Department of Orthopaedic Surgery, University of California-San Francisco (UCSF), 500 Parnassus Avenue, MU West 3rd Floor Rm 321, San Francisco, CA, USA.
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Sander C, Oppermann H, Nestler U, Sander K, Fehrenbach MK, Wende T, von Dercks N, Meixensberger J. The Relation of Surgical Procedures and Diagnosis Groups to Unplanned Readmission in Spinal Neurosurgery: A Retrospective Single Center Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19084795. [PMID: 35457662 PMCID: PMC9028768 DOI: 10.3390/ijerph19084795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 04/09/2022] [Accepted: 04/12/2022] [Indexed: 02/01/2023]
Abstract
Background: Unplanned readmission has gained increasing interest as a quality marker for inpatient care, as it is associated with patient mortality and higher economic costs. Spinal neurosurgery is characterized by a lack of epidemiologic readmission data. The aim of this study was to identify causes and predictors for unplanned readmissions related to index diagnoses and surgical procedures. Methods: In this study, from 2015 to 2017, spinal neurosurgical procedures were recorded for surgical and non-surgical treated patients. The main reasons for an unplanned readmission within 30 days following discharge were identified. Multivariate logarithmic regression revealed predictors of unplanned readmission. Results: A total of 1172 patient records were examined, of which 4.27% disclosed unplanned readmissions. Among the surgical patients, the readmission rate was 4.06%, mainly attributable to surgical site infections, while it was 5.06% for the non-surgical patients, attributable to uncontrolled pain. A night-time surgery presented as the independent predictive factor. Conclusion: In the heterogeneous group of spinal neurosurgical patients, stratification into diagnostic groups is necessary for statistical analysis. Degenerative lumbar spinal stenosis and spinal abscesses are mainly affected by unplanned readmission. The surgical procedure dorsal root ganglion stimulation is an independent predictor of unplanned re-hospitalizations, as is the timing of surgery.
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Affiliation(s)
- Caroline Sander
- Department of Neurosurgery, University Hospital Leipzig, 04103 Leipzig, Germany; (H.O.); (U.N.); (M.K.F.); (T.W.); (J.M.)
- Correspondence: ; Tel.: +49-341-97-17500
| | - Henry Oppermann
- Department of Neurosurgery, University Hospital Leipzig, 04103 Leipzig, Germany; (H.O.); (U.N.); (M.K.F.); (T.W.); (J.M.)
- Institute of Human Genetics, University Hospital Leipzig, 04103 Leipzig, Germany
| | - Ulf Nestler
- Department of Neurosurgery, University Hospital Leipzig, 04103 Leipzig, Germany; (H.O.); (U.N.); (M.K.F.); (T.W.); (J.M.)
| | | | - Michael Karl Fehrenbach
- Department of Neurosurgery, University Hospital Leipzig, 04103 Leipzig, Germany; (H.O.); (U.N.); (M.K.F.); (T.W.); (J.M.)
| | - Tim Wende
- Department of Neurosurgery, University Hospital Leipzig, 04103 Leipzig, Germany; (H.O.); (U.N.); (M.K.F.); (T.W.); (J.M.)
| | - Nikolaus von Dercks
- Department for Medical Controlling, University Hospital Leipzig, 04103 Leipzig, Germany;
| | - Jürgen Meixensberger
- Department of Neurosurgery, University Hospital Leipzig, 04103 Leipzig, Germany; (H.O.); (U.N.); (M.K.F.); (T.W.); (J.M.)
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Do In-Hospital Rothman Index Scores Predict Postdischarge Adverse Events and Discharge Location After Total Knee Arthroplasty? J Arthroplasty 2022; 37:668-673. [PMID: 34954019 PMCID: PMC8934277 DOI: 10.1016/j.arth.2021.12.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 09/22/2021] [Accepted: 12/15/2021] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND There have been efforts to reduce adverse events and unplanned readmissions after total joint arthroplasty. The Rothman Index (RI) is a real-time, composite measure of medical acuity for hospitalized patients. We aimed to examine the association among in-hospital RI scores and complications, readmissions, and discharge location after total knee arthroplasty (TKA). We hypothesized that RI scores could be used to predict the outcomes of interest. METHODS This is a retrospective study of an institutional database of elective, primary TKA from July 2018 until December 2019. Complications and readmissions were defined per Centers for Medicare and Medicaid Services. Analysis included multivariate regression, computation of the area under the curve (AUC), and the Youden Index to set RI thresholds. RESULTS The study cohort's (n = 957) complications (2.4%), readmissions (3.6%), and nonhome discharge (13.7%) were reported. All RI metrics (minimum, maximum, last, mean, range, 25th%, and 75th%) were significantly associated with increased odds of readmission and home discharge (all P < .05). RI scores were not significantly associated with complications. The optimal RI thresholds for increased risk of readmission were last ≤ 71 (AUC = 0.65), mean ≤ 67 (AUC = 0.66), or maximum ≤ 80 (AUC = 0.63). The optimal RI thresholds for increased risk of home discharge were minimum ≥ 53 (AUC = 0.65), mean ≥ 69 (AUC = 0.65), or maximum ≥ 81 (AUC = 0.60). CONCLUSION RI values may be used to predict readmission or home discharge after TKA.
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Donnally CJ, Henstenburg JM, Pezzulo JD, Farronato D, Patel PD, Sherman M, Canseco JA, Kepler CK, Vaccaro AR. Increased Surgical Site Subcutaneous Fat Thickness Is Associated with Infection after Posterior Cervical Fusion. Surg Infect (Larchmt) 2022; 23:364-371. [PMID: 35262398 DOI: 10.1089/sur.2021.271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background: Previous literature has associated increased body mass index (BMI) with risk of surgical site infection (SSI) after posterior cervical fusion (PCF) surgery. However, few studies have examined the association between local adiposity and risk of SSI, re-admission, and re-operation after PCF. Local adiposity is easily measured on pre-operative magnetic resonance imaging (MRI) and may act as a more accurate predictor compared with BMI. Patients and Methods: Subjects undergoing PCF from 2013-2018 at a single institution were identified retrospectively. Posterior cervical subcutaneous fat thickness, paraspinal muscle thickness, and lamina-to-skin distance measurements were obtained from computed tomography (CT) or MRI scans. Subjects with active infection, malignancy, or revision procedures were excluded. Results: Two hundred five patients were included with 20 developing SSIs. Subjects with SSIs had a longer fusion construct (4.90 vs. 3.71 levels; p = 0.001), higher Elixhauser comorbidity index (ECI; 2.05 vs. 1.34; p = 0.045), had a history of diabetes mellitus (30% vs. 10.8%; p = 0.026), higher subcutaneous fat thickness (30.5 vs. 23.6 mm; p = 0.013), and higher lamina-to-skin distance (66.4 vs. 57.9 mm; p = 0.027). Subcutaneous fat thickness (odds ratio [OR], 1.05; 95% confidence interval [CI], 1.01-1.10]; p = 0.026) and lamina-to-skin distance (OR, 1.05; 95% CI, 1.01-1.09]; p = 0.014) were associated with SSI in multivariable analysis. A subcutaneous fat thickness cutoff value of 23.2 mm had 90% sensitivity and 54.1% specificity for prediction of SSI. There was no association need for re-admission or re-operation. Conclusions: Increased posterior cervical fat may increase the risk of SSI after PCF. Pre-operative advanced imaging may be a valuable tool for assisting with patient counseling, optimization, and risk stratification.
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Affiliation(s)
- Chester J Donnally
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Jeffery M Henstenburg
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Joshua D Pezzulo
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Dominic Farronato
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Parthik D Patel
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Matthew Sherman
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Jose A Canseco
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Christopher K Kepler
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Alexander R Vaccaro
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
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Karhade AV, Lavoie-Gagne O, Agaronnik N, Ghaednia H, Collins AK, Shin D, Schwab JH. Natural language processing for prediction of readmission in posterior lumbar fusion patients: which free-text notes have the most utility? Spine J 2022; 22:272-277. [PMID: 34407468 DOI: 10.1016/j.spinee.2021.08.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/19/2021] [Accepted: 08/09/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT The increasing volume of free-text notes available in electronic health records has created an opportunity for natural language processing (NLP) algorithms to mine this unstructured data in order to detect and predict adverse outcomes. Given the volume and diversity of documentation available in spine surgery, it remains unclear which types of documentation offer the greatest value for prediction of adverse outcomes. STUDY DESIGN/SETTING Retrospective review of medical records at two academic and three community hospitals. PURPOSE The purpose of this study was to conduct an exploratory analysis in order to examine the utility of free-text notes generated during the index hospitalization for lumbar spine fusion for prediction of 90-day unplanned readmission. PATIENT SAMPLE Adult patients 18 years or older undergoing lumbar spine fusion for lumbar spondylolisthesis or lumbar spinal stenosis between January 1, 2016 and December 31, 2020. OUTCOME MEASURES The primary outcome was inpatient admission within 90-days of discharge from the index hospitalization. METHODS The predictive performance of NLP algorithms developed by using discharge summary notes, operative notes, nursing notes, physical therapy notes, case management notes, medical doctor (MD) (resident or attending), and allied practice professional (APP) (nurse practitioner or physician assistant) notes were assessed by discrimination, calibration, overall performance. RESULTS Overall, 708 patients were included in the study and 83 (11.7%) had 90-day inpatient readmission. In the independent testing set of patients (n=141) not used for model development, the area under the receiver operating curve of NLP algorithms for prediction of 90-day readmission using discharge summary notes, operative notes, nursing notes, physical therapy notes, case management notes, MD/APP notes was 0.70, 0.57, 0.57, 0.60, 0.60, and 0.49 respectively. CONCLUSION In this exploratory analysis, discharge summary, physical therapy, and case management notes had the most utility and daily MD/APP progress notes had the least utility for prediction of 90-day inpatient readmission in lumbar fusion patients among the free-text documentation generated during the index hospitalization.
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Affiliation(s)
- Aditya V Karhade
- Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Harvard Combined Orthopaedic Residency Program, Boston, MA, USA
| | - Ophelie Lavoie-Gagne
- Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Nicole Agaronnik
- Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Hamid Ghaednia
- Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Austin K Collins
- Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - David Shin
- Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Joseph H Schwab
- Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Harvard Combined Orthopaedic Residency Program, Boston, MA, USA.
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Maielli LF, Tebet MA, Rosa AF, Lima MC, Mistro Neto S, Cavali PTM, Pasqualini W, Risso Neto MÍ. IDENTIFICATION OF RISK FACTORS ASSOCIATED WITH 30-DAY READMISSION OF PATIENTS SUBMITTED TO ANTERIOR OR POSTERIOR ACCESS CERVICAL SPINE SURGERY. COLUNA/COLUMNA 2022. [DOI: 10.1590/s1808-185120222103262527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Aim: To conduct a systematic review of the literature to identify risk factors associated with 30-day readmission of patients submitted to anterior or posterior access cervical spine surgery. Methods: The databases used to select the papers were PubMed, Web of Science, and Cochrane, using the following search strategy: patient AND readmission AND (30 day OR “thirty day” OR 30-day OR thirty-day) AND (spine AND cervical). Results: Initially, 179 papers that satisfied the established search stringwere selected. After reading the titles and abstracts, 46 were excluded from the sample for not effectively discussing the theme proposed for this review. Of the 133 remaining papers, 109 were also excluded after a detailed reading of their content, leaving 24 that were included in the sample for the meta-analysis. Conclusions: The average readmission rate in the studies evaluated was 4.85%. Only the occurrence of infections, as well as the presence of patients classified by the American Society of Anesthesiology (ASA) assessment system with scores greater than III, were causal factors that influenced the readmission of patients. No significant differences were noted when comparing the anterior and posterior surgical access routes. Level of evidence II; Systematic Review of Level II or Level I Studies with discrepant results.
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Rohrer F, Haddenbruch D, Noetzli H, Gahl B, Limacher A, Hermann T, Bruegger J. Readmissions after elective orthopedic surgery in a comprehensive co-management care system-a retrospective analysis. Perioper Med (Lond) 2021; 10:47. [PMID: 34906233 PMCID: PMC8672479 DOI: 10.1186/s13741-021-00218-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Accepted: 09/06/2021] [Indexed: 11/21/2022] Open
Abstract
Background No surgical intervention is without risk. Readmissions and reoperations after elective orthopedic surgery are common and are also stressful for the patient. It has been shown that a comprehensive ortho-medical co-management model decreases readmission rates in older patients suffering from hip fracture; but it is still unclear if this also applies to elective orthopedic surgery. The aim of the current study was to determine the proportion of unplanned readmissions or returns to operating room (for any reason) across a broad elective orthopedic population within 90 days after elective surgery. All cases took place in a tertiary care center using co-management care and were also assessed for risk factors leading to readmission or unplanned return to operating room (UROR). Methods In this observational study, 1295 patients undergoing elective orthopedic surgery between 2015 and 2017 at a tertiary care center in Switzerland were investigated. The proportion of reoperations and readmissions within 90 days was measured, and possible risk factors for reoperation or readmission were identified using logistic regression. Results In our cohort, 3.2% (42 of 1295 patients) had an UROR or readmission. Sixteen patients were readmitted without requiring further surgery—nine of which due to medical and seven to surgical reasons. Patient-related factors associated with UROR and readmission were older age (67 vs. 60 years; p = 0.014), and American Society of Anesthesiologists physical status (ASA PS) score ≥ 3 (43% vs. 18%; p < 0.001). Surgery-related factors were: implantation of foreign material (62% vs. 33%; p < 0.001), duration of operation (76 min. vs. 60 min; p < 0.001), and spine surgery (57% vs. 17%; p < 0.001). Notably, only spine surgery was also found to be independent risk factor. Conclusion Rates of UROR during initial hospitalization and readmission were lower in the current study than described in the literature. However, several comorbidities and surgery-related risk factors were found to be associated with these events. Although no surgery is without risk, known threats should be reduced and every effort undertaken to minimize complications in high-risk populations. Further prospective controlled research is needed to investigate the potential benefits of a co-management model in elective orthopedic surgery.
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Affiliation(s)
- Felix Rohrer
- Department of Internal Medicine, Sonnenhofspital, 3006, Bern, Switzerland. .,Centre Hospitalier Universitaire Vaudois, CHUV, 1011, Lausanne, Switzerland.
| | | | - Hubert Noetzli
- University of Bern, 3012, Bern, Switzerland.,Orthopaedie Sonnenhof, 3006, Bern, Switzerland
| | - Brigitta Gahl
- Clinical Trials Unit (CTU) Bern, University of Bern, 3012, Bern, Switzerland
| | - Andreas Limacher
- Clinical Trials Unit (CTU) Bern, University of Bern, 3012, Bern, Switzerland
| | - Tanja Hermann
- Stiftung Lindenhof, Campus SLB, Swiss Institute for Translational and Entrepreneurial Medicine, 3010, Bern, Switzerland
| | - Jan Bruegger
- Department of Internal Medicine, Sonnenhofspital, 3006, Bern, Switzerland.,University of Zurich, 8006, Zurich, Switzerland
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Neurosurgical Care during the COVID-19 Pandemic in Central Germany: A Retrospective Single Center Study of the Second Wave. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182212034. [PMID: 34831787 PMCID: PMC8618904 DOI: 10.3390/ijerph182212034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/09/2021] [Accepted: 11/12/2021] [Indexed: 12/13/2022]
Abstract
The healthcare system has been placed under an enormous burden by the SARS-CoV-2 (COVID-19) pandemic. In addition to the challenge of providing sufficient care for COVID-19 patients, there is also a need to ensure adequate care for non-COVID-19 patients. We investigated neurosurgical care in a university hospital during the pandemic. We examined the second wave of the pandemic from 1 October 2020 to 15 March 2021 in this retrospective single-center study and compared it to a pre-pandemic period from 1 October 2019 to 15 March 2020. Any neurosurgical intervention, along with patient- and treatment-dependent factors, were recorded. We also examined perioperative complications and unplanned readmissions. A statistical comparison of the study groups was performed. We treated 535 patients with a total of 602 neurosurgical surgeries during the pandemic. This compares to 602 patients with 717 surgeries during the pre-pandemic period. There were 67 fewer patients (reduction to 88.87%) admitted and 115 fewer surgeries (reduction to 83.96%) performed, which were essentially highly elective procedures, such as cervical spinal stenosis, intracranial neurinomas, and peripheral nerve lesions. Regarding complication rates and unplanned readmissions, there was no significant difference between the COVID-19 pandemic and the non-pandemic patient group. Operative capacities were slightly reduced to 88% due to the pandemic. Nevertheless, comprehensive emergency and elective care was guaranteed in our university hospital. This speaks for the sufficient resources and high-quality processes that existed even before the pandemic.
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Hussain MM, Bibi F, Shah S, Mitha R, Shamim MS, Ziauddin A, Zafar H. First American College of Surgeons National Surgical Quality Improvement Program Report from a Low-Middle-Income Country: A 1-Year Outcome Analysis of Neurosurgical Cases. World Neurosurg 2021; 155:e156-e167. [PMID: 34403795 DOI: 10.1016/j.wneu.2021.08.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 08/05/2021] [Accepted: 08/06/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Low-middle-income countries (LMICs) share a substantial proportion of global surgical complications. This is compounded by the seemingly deficient documentation of postsurgical complications and the lack of a national average for comparison. In this context, the implementation of the American College of Surgeons (ACS) National Surgical Quality Improvement Program (NSQIP) that compares hospital performance based on postsurgical complication data provided by a wide array of centers, could be a major initiative in a resource-challenged setting. Implementation of the NSQIP has provenly mitigated postoperative morbidity and mortality across many centers all over the world. To our knowledge, this report is the first from an LMIC to report its postoperative neurosurgical complications in comparison with international benchmarks. METHODS Our hospital joined the NSQIP in 2019. Through a standardized ACS protocol, ACS-trained surgical clinical reviewers (SCRs) reviewed and extracted data from randomly assigned neurosurgical patients' medical records from preoperative to postoperative (30-day) data using validated, standardized data definitions. SCRs entered deidentified data in an online Health Insurance Portability and Accountability Act web-based secure platform. The validated data were then consigned to the ACS NSQIP head office in the United States where the data were analyzed and compared with similar data from other centers registered with the NSQIP. In this way, our hospital was rated for each of the variables related to postsurgical complications after both spinal and cranial procedures, and the results were sent back to us in the form of text, tables, and graphs. RESULTS Our initial report suggested a relatively higher odds ratio for sepsis and readmissions after spinal procedures at our hospital, and a similarly higher odds ratio for morbidity, sepsis, urinary tract infection, and surgical site infection for cranial procedures. For these variables, our hospital fell in the needs improvement category of the NSQIP. For the rest of the variables studied for both spinal and cranial procedures, the hospital fell in the as expected category of the NSQIP. CONCLUSIONS Implementation of the NSQIP is an important first step in creating a culture of transparency, safety, and quality. This is the first report of NSQIP implementation in an LMIC, and we have shown comparable results to developed countries.
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Affiliation(s)
- Mustafa Mushtaq Hussain
- Section of Neurosurgery, Department of Surgery, Aga Khan University Hospital, Karachi, Pakistan
| | - Farida Bibi
- Neurology and Neurosurgery Nursing, Aga Khan University Hospital, Karachi, Pakistan
| | - Shafqat Shah
- Neurology and Neurosurgery Nursing, Aga Khan University Hospital, Karachi, Pakistan
| | - Rida Mitha
- Post-Graduate Medical Education, Aga Khan University Hospital, Karachi, Pakistan
| | - Muhammad Shahzad Shamim
- Section of Neurosurgery, Department of Surgery, Aga Khan University Hospital, Karachi, Pakistan.
| | - Afsheen Ziauddin
- Quality and Patient Safety Office, Aga Khan University Hospital, Karachi, Pakistan
| | - Hasnain Zafar
- Quality and Patient Safety Office, Aga Khan University Hospital, Karachi, Pakistan
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Risk Factors Associated with 90-day Readmissions Following Odontoid Fractures: A Nationwide Readmissions Database Study. Spine (Phila Pa 1976) 2021; 46:1039-1047. [PMID: 33625117 DOI: 10.1097/brs.0000000000004010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Nationwide Readmissions Database Study. OBJECTIVE The aim of this study was to investigate readmission rates and factors related to readmission after surgical and nonsurgical management of odontoid fractures. SUMMARY OF BACKGROUND DATA Management of odontoid fractures, which are the most common isolated spine fracture in the elderly, continues to be debated. The choice between surgical or nonsurgical treatment has been reported to impact mortality and might influence readmission rates. Hospital readmissions represent a large financial burden upon our healthcare system. Factors surrounding hospital readmissions would benefit from a better understanding of their associated causes to lower health care costs. METHODS A retrospective study was performed using the 2016 Healthcare Utilization Project (HCUP) Nationwide Readmission Database (NRD). Demographic information and factors associated with readmission were collected. Readmission rates, complications, length of hospital stay were collected. Patients treated operatively, nonoperatively, and patients who were readmitted or not readmitted were compared. Statistical analysis was performed using open source software SciPy (Python v1.3.0) for all analyses. RESULTS We identified 2921 patients who presented with Type II dens fractures from January 1, 2016 to September 30, 2016, 555 of which underwent surgical intervention. The readmission rate in patients who underwent surgery was 16.4% (91/555) and 29.4% (696/2366) in the nonoperative group. Hospital costs for readmitted and nonreadmitted patients were $353,704 and $174,922, and $197,099 and $80,715 for nonoperatively managed patients, respectively. Medicaid and Medicare patients had the highest readmission rate in both groups. Charlson and Elixhauser comorbidity indices were significantly higher in patients who were readmitted (P < 0.0001). CONCLUSION We report an overall 90-day readmission rate of 16.4% and 29.4%, in operative and nonoperative management of type II odontoid fractures, respectively. In the face of a rising incidence of this fracture in the elderly population, an understanding of the comorbidities and age-related demographics associated with 90-day readmissions following both surgical and nonsurgical treatment are critical.Level of Evidence: 3.
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Padmanaban V, Gigliotti M, Majid S, Jareczek FJ, Fritch C, Hazard SW, Zacko JC, Simon SD, Kalapos P, Church EW, Wilkinson DA, Cockroft KM. Risk Factors Associated with ICU-Specific Care in Patients Undergoing Endovascular Treatment of Unruptured Intracranial Aneurysms. Neurocrit Care 2021; 36:39-45. [PMID: 34309785 DOI: 10.1007/s12028-021-01306-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Accepted: 06/16/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Multiple studies suggest routine postoperative intensive care unit (ICUs) stays in presumed high-risk neurosurgical procedures may be unnecessary. Our objective was to evaluate the risk factors associated with ICU-specific needs in patients undergoing elective endovascular treatment of unruptured intracranial aneurysms. METHODS A retrospective review of consecutive patients undergoing elective endovascular treatment of unruptured aneurysms was performed between January 2010 and January 2020 in a single academic medical center. Patient demographic information, aneurysm and treatment characteristics, intraoperative and postoperative complications, as well as ICU-specific needs, were abstracted. The primary outcome was ICU-specific needs. RESULTS A total of 382 patient encounters in 344 unique patients were abstracted. 13.6% (52 of 382) of patient encounters had an ICU-specific need. Multivariate analysis revealed that age [adjusted odds ratio (OR) 1.04, 95% confidence interval (CI) 1.01-1.07, p = 0.03], procedure duration greater 200 min (adjusted OR 2.75, 95% CI 1.34-5.88, p = 0.007), and any intraoperative complication (adjusted OR 20.41, CI 7.97-56.57, p < 0.001) were independent predictors of postoperative ICU-specific needs. The majority of ICU-specific needs (94%, 49 of 52) occurred within 6 h of surgery. CONCLUSIONS Our results show that age, procedure duration greater than or equal to 200 min, and intraoperative complication were independent predictors of postoperative ICU-specific needs in patients presenting for elective endovascular treatment of unruptured intracranial aneurysms. The majority of ICU-specific needs and associated complications occurred in the immediate postoperative period. This data can be used to help decide the appropriate postoperative level of care in this patient population.
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Affiliation(s)
- Varun Padmanaban
- Department of Neurosurgery - EC110, 30 Hope Drive, Pennsylvania State University College of Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA, 17033, USA
| | - Michael Gigliotti
- Department of Neurosurgery - EC110, 30 Hope Drive, Pennsylvania State University College of Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA, 17033, USA
| | - Sonia Majid
- Department of Neurosurgery - EC110, 30 Hope Drive, Pennsylvania State University College of Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA, 17033, USA
| | - Francis J Jareczek
- Department of Neurosurgery - EC110, 30 Hope Drive, Pennsylvania State University College of Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA, 17033, USA
| | - Chanju Fritch
- Department of Neurosurgery - EC110, 30 Hope Drive, Pennsylvania State University College of Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA, 17033, USA
| | - Sprague W Hazard
- Department of Neurosurgery - EC110, 30 Hope Drive, Pennsylvania State University College of Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA, 17033, USA.,Department of Anesthesia and Perioperative Services, Pennsylvania State University College of Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA, USA
| | - J Christopher Zacko
- Department of Neurosurgery - EC110, 30 Hope Drive, Pennsylvania State University College of Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA, 17033, USA
| | - Scott D Simon
- Department of Neurosurgery - EC110, 30 Hope Drive, Pennsylvania State University College of Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA, 17033, USA
| | - Paul Kalapos
- Department of Radiology, Pennsylvania State University College of Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Ephraim W Church
- Department of Neurosurgery - EC110, 30 Hope Drive, Pennsylvania State University College of Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA, 17033, USA
| | - D Andrew Wilkinson
- Department of Neurosurgery - EC110, 30 Hope Drive, Pennsylvania State University College of Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA, 17033, USA
| | - Kevin M Cockroft
- Department of Neurosurgery - EC110, 30 Hope Drive, Pennsylvania State University College of Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA, 17033, USA. .,Department of Radiology, Pennsylvania State University College of Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA, USA. .,Department of Public Health Services, Pennsylvania State University College of Medicine, Penn State Milton S. Hershey Medical Center, Hershey, PA, USA.
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DeVries Z, Locke E, Hoda M, Moravek D, Phan K, Stratton A, Kingwell S, Wai EK, Phan P. Using a national surgical database to predict complications following posterior lumbar surgery and comparing the area under the curve and F1-score for the assessment of prognostic capability. Spine J 2021; 21:1135-1142. [PMID: 33601012 DOI: 10.1016/j.spinee.2021.02.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 01/11/2021] [Accepted: 02/11/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND With spinal surgery rates increasing in North America, models that are able to accurately predict which patients are at greater risk of developing complications are highly warranted. However, the previously published methods which have used large, multi-centre databases to develop their prediction models have relied on the receiver operator characteristics curve with the associated area under the curve (AUC) to assess their model's performance. Recently, it has been found that a precision-recall curve with the associated F1-score could provide a more realistic analysis for these models. PURPOSE To develop a logistic regression (LR) model for the prediction of complications following posterior lumbar spine surgery and to then assess for any difference in performance of the model when using the AUC versus the F1-score. STUDY DESIGN Retrospective review of a prospective cohort. PATIENT SAMPLE The American College of Surgeons National Surgical Quality Improvement Program (NSQIP) registry was used. All patients that underwent posterior lumbar spine surgery between 2005 to 2016 with appropriate data were included. OUTCOME MEASURES Both the AUC and F1-score were utilized to assess the prognostic performance of the prediction model. METHODS In order to develop the LR model used to predict a complication during or following spine surgery, 19 variables were selected by three orthopedic spine surgeons from the NSQIP registry. Two datasets were developed for this analysis: (1) an imbalanced dataset, which was taken directly from the NSQIP registry, and (2) a down-sampled set. The purpose of the down-sampled set was to balance the data in order to evaluate whether balancing the data had an effect on model performance. The AUC and F1-score were applied to both of these datasets. RESULTS Within the NSQIP database, 52,787 spine surgery cases were identified of which only 10% of these cases had complications during surgery. Applying the LR model showed a large difference between the AUC (0.69) and the F1 score (0.075) on the imbalanced dataset. However, no major differences existed between the AUC and F1-score when the data was balanced and the LR model was reapplied (0.69 and 0.62, AUC and F1-score, respectively). CONCLUSIONS The F1-score detected a drastically lower performance for the prediction of complications when using the imbalanced data, but detected a performance similar to the AUC level when balancing techniques were utilized for the dataset. This difference is due to a low precision score when many false positive classifications are present, which is not identified when using the AUC value. This lowers the utility of the AUC score, as many of the datasets used in medicine are imbalanced. Therefore, we recommend using the F1-score on large, prospective databases when the data is imbalanced with a large amount of true negative classifications.
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Affiliation(s)
- Zachary DeVries
- Ottawa Spine Collaborative Analytics Network, The Ottawa Hospital, Ottawa, ON, Canada K1Y 4E9
| | - Eric Locke
- Ottawa Spine Collaborative Analytics Network, The Ottawa Hospital, Ottawa, ON, Canada K1Y 4E9
| | - Mohamad Hoda
- Ottawa Spine Collaborative Analytics Network, The Ottawa Hospital, Ottawa, ON, Canada K1Y 4E9
| | - Dita Moravek
- Ottawa Spine Collaborative Analytics Network, The Ottawa Hospital, Ottawa, ON, Canada K1Y 4E9; Ottawa Hospital Research Institute, Ottawa, ON, Canada K1Y 4E9
| | - Kim Phan
- Ottawa Spine Collaborative Analytics Network, The Ottawa Hospital, Ottawa, ON, Canada K1Y 4E9
| | - Alexandra Stratton
- Ottawa Spine Collaborative Analytics Network, The Ottawa Hospital, Ottawa, ON, Canada K1Y 4E9; Division of Orthopaedic Surgery, Department of Surgery, Faculty of Medicine, University of Ottawa, The Ottawa Hospital, 1053 Carling Avenue, Ottawa, ON, Canada K1Y 4E9
| | - Stephen Kingwell
- Ottawa Spine Collaborative Analytics Network, The Ottawa Hospital, Ottawa, ON, Canada K1Y 4E9; Division of Orthopaedic Surgery, Department of Surgery, Faculty of Medicine, University of Ottawa, The Ottawa Hospital, 1053 Carling Avenue, Ottawa, ON, Canada K1Y 4E9
| | - Eugene K Wai
- Ottawa Spine Collaborative Analytics Network, The Ottawa Hospital, Ottawa, ON, Canada K1Y 4E9; Division of Orthopaedic Surgery, Department of Surgery, Faculty of Medicine, University of Ottawa, The Ottawa Hospital, 1053 Carling Avenue, Ottawa, ON, Canada K1Y 4E9; Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada K1Y 4E9
| | - Philippe Phan
- Ottawa Spine Collaborative Analytics Network, The Ottawa Hospital, Ottawa, ON, Canada K1Y 4E9; Ottawa Hospital Research Institute, Ottawa, ON, Canada K1Y 4E9; Division of Orthopaedic Surgery, Department of Surgery, Faculty of Medicine, University of Ottawa, The Ottawa Hospital, 1053 Carling Avenue, Ottawa, ON, Canada K1Y 4E9.
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White AJ, Fiani B, Jarrah R, Momin AA, Rasouli J. Surgical Site Infection Prophylaxis and Wound Management in Spine Surgery. Asian Spine J 2021; 16:451-461. [PMID: 34167274 PMCID: PMC9260408 DOI: 10.31616/asj.2020.0674] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 03/11/2021] [Indexed: 11/30/2022] Open
Abstract
Surgical site infection (SSI) is a potentially devastating complication of spinal surgery that increases patient morbidity and healthcare costs. SSIs have complex and multifactorial etiologies; therefore, there are numerous opportunities for prevention and risk mitigation. The aim of this narrative review was to describe the incidence, risk factors, and outcomes of SSIs in spine surgery with an emphasis on postoperative wound care. We list and describe the preoperative, intraoperative, and postoperative evidence-based interventions that can be applied to potentially prevent SSI after spinal surgery.
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Affiliation(s)
- Alexandra J White
- Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH, USA
| | - Brian Fiani
- Department of Neurosurgery, Desert Regional Medical Center, Palm Springs, CA, USA
| | - Ryan Jarrah
- Department of Neurosurgery, Mayo Clinic, Rochester, MN, USA
| | - Arbaz A Momin
- Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH, USA
| | - Jonathan Rasouli
- Department of Neurological Surgery, Cleveland Clinic, Cleveland, OH, USA
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Lenski M, Tonn JC, Siller S. Interleukin-6 as inflammatory marker of surgical site infection following spinal surgery. Acta Neurochir (Wien) 2021; 163:1583-1592. [PMID: 33118112 DOI: 10.1007/s00701-020-04628-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 10/22/2020] [Indexed: 12/19/2022]
Abstract
BACKGROUND In order to elucidate whether serum inflammatory markers identify patients with local surgical site infection(SSI) as underlying disease for recurrent or new symptomatology following spine surgery, we evaluated the diagnostic potential of interleukin-6(IL-6) as a marker of SSI. The diagnostic significance of IL-6 was compared to the standard serum inflammatory markers C-reactive protein(CRP) and white blood cell count (WBCC). METHOD Ninety-eight consecutive patients with readmission due to recurrent or new symptomology after spinal surgery of degenerative spine disorders entered the study. Baseline patients' characteristics and the abovementioned inflammatory markers were collected, and arithmetical means with standard deviation, area under the curve (AUC), thresholds, sensitivity, specificity, positive(+)likelihood ratio (LR), and negative(-)LR with corresponding 95% confidence interval(95%CI) were calculated and correlated with presence or absence of SSI. RESULTS Nine patients suffered from a SSI, whereas the remaining 89 patients had a recurrent/adjacent-segment degenerative disorder without evidence of infection. The most significant parameter for diagnosing a SSI was serum IL-6 (cut-off value > 15.3 pg/ml, AUC = 0.954, SE = 85.7%, SP = 97.3%), followed by CRP (cut-off value = 0.8 mg/dl, AUC = 0.916, SE = 88.9%, SP = 84.5%) CONCLUSIONS: In the case of recurrent or new symptomatology following spinal surgery, serum IL-6 has the highest diagnostic potential for diagnosing spinal SSI.
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Connolly J, Borja AJ, Kvint S, Detchou DKE, Glauser G, Strouz K, McClintock SD, Marcotte PJ, Malhotra NR. Outcomes Following Discectomy for Far Lateral Disc Herniation Are Not Predicted by Obstructive Sleep Apnea. Cureus 2021; 13:e14921. [PMID: 34123620 PMCID: PMC8189272 DOI: 10.7759/cureus.14921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Introduction Previous studies have demonstrated that obstructive sleep apnea (OSA) is associated with adverse postoperative outcomes, but few studies have examined OSA in a purely spine surgery population. This study investigates the association of the STOP-Bang questionnaire, a screening tool for undiagnosed OSA, with adverse events following discectomy for far lateral disc herniation (FLDH). Methods All adult patients (n = 144) who underwent FLDH surgery at a single, multihospital, academic medical center (2013-2020) were retrospectively enrolled. Univariate logistic regression was performed to evaluate the relationship between risk of OSA (low- or high-risk) according to STOP-Bang score and postsurgical outcomes, including unplanned hospital readmissions, ED visits, and reoperations. Results Ninety-two patients underwent open FLDH surgery, while 52 underwent endoscopic procedures. High risk of OSA according to STOP-Bang score did not predict risk of readmission, ED visit, outpatient office visit, or reoperation of any kind within either 30 days or 30-90 days of surgery. High risk of OSA also did not predict risk of reoperation of any kind or repeat neurosurgical intervention within 30 days or 90 days of the index admission (either during the same admission or after discharge). Conclusion The STOP-Bang questionnaire is not a reliable tool for predicting post-operative morbidity and mortality for FLDH patients undergoing discectomy. Additional studies are needed to assess the impact of OSA on morbidity and mortality in other spine surgery populations.
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Affiliation(s)
- John Connolly
- Department of Neurosurgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, USA
| | - Austin J Borja
- Department of Neurosurgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, USA
| | - Svetlana Kvint
- Department of Neurosurgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, USA
| | - Donald K E Detchou
- Department of Neurosurgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, USA
| | - Gregory Glauser
- Department of Neurosurgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, USA
| | - Krista Strouz
- McKenna EpiLog Fellowship in Population Health, University of Pennsylvania, Philadelphia, USA.,Department of Mathematics, West Chester University, West Chester, USA
| | | | - Paul J Marcotte
- Department of Neurosurgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, USA
| | - Neil R Malhotra
- Department of Neurosurgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, USA
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Kuris EO, Veeramani A, McDonald CL, DiSilvestro KJ, Zhang AS, Cohen EM, Daniels AH. Predicting Readmission After Anterior, Posterior, and Posterior Interbody Lumbar Spinal Fusion: A Neural Network Machine Learning Approach. World Neurosurg 2021; 151:e19-e27. [PMID: 33744425 DOI: 10.1016/j.wneu.2021.02.114] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 02/22/2021] [Accepted: 02/26/2021] [Indexed: 12/15/2022]
Abstract
BACKGROUND Readmission after spine surgery is costly and a relatively common occurrence. Previous research identified several risk factors for readmission; however, the conclusions remain equivocal. Machine learning algorithms offer a unique perspective in analysis of risk factors for readmission and can help predict the likelihood of this occurrence. This study evaluated a neural network (NN), a supervised machine learning technique, to determine whether it could predict readmission after 3 lumbar fusion procedures. METHODS The American College of Surgeons National Surgical Quality Improvement Program database was queried between 2009 and 2018. Patients who had undergone anterior, lateral, and/or posterior lumbar fusion were included in the study. The Python scikit Learn package was used to run the NN algorithm. A multivariate regression was performed to determine risk factors for readmission. RESULTS There were 63,533 patients analyzed (12,915 anterior lumbar interbody fusion, 27,212 posterior lumbar interbody fusion, and 23,406 posterior spinal fusion cases). The NN algorithm was able to successfully predict 30-day readmission for 94.6% of anterior lumbar interbody fusion, 94.0% of posterior lumbar interbody fusion, and 92.6% of posterior spinal fusion cases with area under the curve values of 0.64-0.65. Multivariate regression indicated that age >65 years and American Society of Anesthesiologists class >II were linked to increased risk for readmission for all 3 procedures. CONCLUSIONS The accurate metrics presented indicate the capability for NN algorithms to predict readmission after lumbar arthrodesis. Moreover, the results of this study serve as a catalyst for further research into the utility of machine learning in spine surgery.
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Affiliation(s)
- Eren O Kuris
- Department of Orthopedic Surgery, Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence, Rhode Island, USA
| | - Ashwin Veeramani
- Division of Applied Mathematics, Brown University, Providence, Rhode Island, USA
| | - Christopher L McDonald
- Department of Orthopedic Surgery, Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence, Rhode Island, USA
| | - Kevin J DiSilvestro
- Department of Orthopedic Surgery, Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence, Rhode Island, USA
| | - Andrew S Zhang
- Department of Orthopedic Surgery, Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence, Rhode Island, USA
| | - Eric M Cohen
- Department of Orthopedic Surgery, Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence, Rhode Island, USA
| | - Alan H Daniels
- Department of Orthopedic Surgery, Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence, Rhode Island, USA.
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Influence of Osteoporosis Following Spine Surgery on Reoperation, Readmission, and Economic Costs: An 8-Year Nationwide Population-Based Study in Korea. World Neurosurg 2021; 149:e360-e368. [PMID: 33601076 DOI: 10.1016/j.wneu.2021.02.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 02/04/2021] [Accepted: 02/05/2021] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To evaluate the relationship between prevalence of osteoporosis and risk factors, medical costs, reoperation, and readmission in patients after spine surgery. METHODS Patients >50 years old with thoracic or lumbar spine diseases who underwent spine surgery between 2005 and 2008 were selected from the Korean National Health Insurance Service databases for analysis. There were 147,676 patients selected, who were divided into 2 groups (osteoporosis and non-osteoporosis) and followed for 8 years. Multiple logistic regressions were performed to examine the effect of osteoporosis following spine surgery. RESULTS Patients with osteoporosis showed significant increases in readmission rates (odds ratio = 1.26, P < 0.001). Osteoporosis was found to be significantly associated with longer hospital stays and increased medical costs regardless of the cause of spine disease. For readmission, there was a 62-day difference in hospitalization time and U.S. dollars $2040 difference in medical costs between the osteoporosis group and non-osteoporosis group. Total medical costs of the osteoporosis group were about U.S. dollars $310 million more than total medical costs of the non-osteoporosis group. Osteoporosis increased the risk of reoperation in fusion surgery, particularly in the first 3 months postoperatively (odds ratio = 1.34, P < 0.001). CONCLUSIONS Osteoporosis was significantly associated with higher readmission rates, longer hospitalization, and greater medical costs during the 8-year follow-up. It also increased the risk of reoperation in fusion surgery. Proper management of osteoporosis is essential before spine surgery, particularly fusion surgery, to help reduce patients' socioeconomic burden and produce more satisfactory surgical outcomes.
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Segura-Trepichio M, Pérez-Maciá MV, Candela-Zaplana D, Nolasco A. Lumbar disc herniation surgery: Is it worth adding interspinous spacer or instrumented fusion with regard to disc excision alone? J Clin Neurosci 2021; 86:193-201. [PMID: 33775327 DOI: 10.1016/j.jocn.2021.01.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Accepted: 01/21/2021] [Indexed: 11/17/2022]
Abstract
BACKGROUND Discectomy is sometimes associated with recurrence of disc herniation and pain after surgery. The evidence to use an interspinous dynamic stabilization system or instrumented fusion in association with disc excision to prevent pain and re-operation remains controversial. In this study, we analyzed if adding interspinous spacer or fusion, offers advantages in relation to microdiscetomy alone. METHODS Patients with lumbar disc herniation were divided in 3 groups; microdiscectomy alone (MD), microdiscectomy plus interspinous spacer (IS) and open discectomy plus posterior lumbar interbody fusion (PLIF). The clinical efficacy was measured using the Owestry Disability Index (ODI). Other outcome parameters including visual analogue scale for pain (VAS) back and legs, length of stay, direct in-hospital cost, 90-day complication rate, and 1-year re-operation rate were also evaluated. RESULTS A total of 103 patients whose mean age was 39.1 (±8.5) years were included. A significant improvement of the ODI and VAS back and legs pain baseline score was detected in the 3 groups. After 1 year, no significant differences in ODI, VAS back and legs pain were found between the 3 groups. There was an increase of 169% of the total direct in- hospital cost in IS group and 287% in PLIF group, in relation to MD (p < 0.001). Length of stay was 86% higher in the IS group and 384% longer in the PLIF group compared to MD (p < 0.001). The 1 year re-operation rates were 5.6%, 10% and 16.2% (p = 0.33). Discectomy seems to be the main responsible for the clinical improvement, without the interspinous spacer or fusion adding any benefit. The addition of interspinous spacer or fusion increased direct in-hospital cost, length of stay, and did not protect against re-operation.
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Affiliation(s)
| | | | - David Candela-Zaplana
- Departamento de Medicina Familiar y Comunitaria, Hospital del Vinalopó, Alicante, Spain
| | - Andreu Nolasco
- Unidad de investigacion para el análisis de las desigualdades en salud y la mortalidad FISABIO-UA, Universidad de Alicante, Alicante, Spain
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Dalton MK, Mjåset C, Manful A, Helgeson MD, Wynn-Jones W, Cooper Z, Koehlmoos TP, Weissman JS. Strategies for spinal surgery reimbursement: bundling in the working-age population. BMC Health Serv Res 2021; 21:112. [PMID: 33530994 PMCID: PMC7852105 DOI: 10.1186/s12913-021-06112-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 01/24/2021] [Indexed: 12/04/2022] Open
Abstract
Introduction Bundled payments for spine surgery, which is known for having high overall cost with wide variation, have been previously studied in older adults. However, there has been limited work examining bundled payments in working-age patients. We sought to identify the variation in the cost of spine surgery among working age adults in a large, national insurance claims database. Methods We queried the TRICARE claims database for all patients, aged 18–64, undergoing cervical and non-cervical spinal fusion surgery between 2012 and 2014. We calculated the case mix adjusted, price standardized payments for all aspects of care during the 60-, 90-, and 180-day periods post operation. Variation was assessed by stratifying Hospital Referral Regions into quintiles. Results After adjusting for case mix, there was significant variation in the cost of both cervical ($10,538.23, 60% of first quintile) and non-cervical ($20,155.59, 74%). Relative variation in total cost decreased from 60- to 180-days (63 to 55% and 76 to 69%). Index hospitalization was the primary driver of costs and variation for both cervical (1st-to-5th quintile range: $11,033–$19,960) and non-cervical ($18,565–$36,844) followed by readmissions for cervical ($0–$11,521) and non-cervical ($0–$13,932). Even at the highest quintile, post-acute care remained the lowest contribution to overall cost ($2070 & $2984). Conclusions There is wide variation in the cost of spine surgery across the United States for working age adults, driven largely by index procedure and readmissions costs. Our findings suggest that implementing episodes longer than the current 90-day standard would do little to better control cost variation. Supplementary Information The online version contains supplementary material available at 10.1186/s12913-021-06112-0.
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Affiliation(s)
- Michael K Dalton
- Center for Surgery and Public Health, Harvard Medical School, Harvard T. H. Chan School of Public Health, Department of Surgery, Brigham and Women's Hospital, 1620 Tremont Street, 1 Brigham Circle, Boston, MA, 02120, USA.
| | - Christer Mjåset
- Department of Health Policy and Management, Harvard T. H. Chan School of Public Health, 677 Huntington Ave, Boston, MA, 02115, USA.,Research and Communication Unit for Musculoskeletal Health (FORMI), Oslo University Hospital, PO Box 4950, Nydalen, 0424, Oslo, Norway.,Commonwealth Fund Harkness Fellowship, 1 East 75th Street, New York, NY, 10021, USA
| | - Adoma Manful
- Center for Surgery and Public Health, Harvard Medical School, Harvard T. H. Chan School of Public Health, Department of Surgery, Brigham and Women's Hospital, 1620 Tremont Street, 1 Brigham Circle, Boston, MA, 02120, USA
| | - Melvin D Helgeson
- Department of Orthopaedics, Walter Reed National Military Medical Center, 8901 Wisconsin Ave, Bethesda, MD, 20814, USA
| | - William Wynn-Jones
- Center for Surgery and Public Health, Harvard Medical School, Harvard T. H. Chan School of Public Health, Department of Surgery, Brigham and Women's Hospital, 1620 Tremont Street, 1 Brigham Circle, Boston, MA, 02120, USA.,Commonwealth Fund Harkness Fellowship, 1 East 75th Street, New York, NY, 10021, USA
| | - Zara Cooper
- Center for Surgery and Public Health, Harvard Medical School, Harvard T. H. Chan School of Public Health, Department of Surgery, Brigham and Women's Hospital, 1620 Tremont Street, 1 Brigham Circle, Boston, MA, 02120, USA
| | - Tracey P Koehlmoos
- F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD, 20184, USA
| | - Joel S Weissman
- Center for Surgery and Public Health, Harvard Medical School, Harvard T. H. Chan School of Public Health, Department of Surgery, Brigham and Women's Hospital, 1620 Tremont Street, 1 Brigham Circle, Boston, MA, 02120, USA
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Elsharydah A, Duncan KL, Rosero EB, Minhajuddin A, Somasundaram A, Joshi GP. Readmission Rate After 2-level Lumbar Decompression: A Propensity-matched Cohort Study Comparing Inpatient and Outpatient Settings. Clin Spine Surg 2021; 34:E1-E6. [PMID: 32341325 DOI: 10.1097/bsd.0000000000000990] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 03/25/2020] [Indexed: 11/25/2022]
Abstract
STUDY DESIGN Retrospective review of the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) database years 2012-2015. OBJECTIVE Compare the 30-day readmission and postoperative major complications rates of 2-level lumbar decompression performed in the ambulatory and the inpatient settings. SUMMARY OF BACKGROUND DATA In recent years, there is an increasing trend toward ambulatory spine surgery. However, there remains a concern regarding risks of readmission and postoperative morbidity after discharge. METHODS The ACS-NSQIP database from 2012 to 2015 was queried for adult patients who underwent elective 2-level lumbar decompression (CPT code 63047 accompanied with code 63048). A cohort of ambulatory lumbar decompression cases was matched 1:1 with an inpatient cohort after controlling for patient demographics, comorbidities, and complexity of the procedure. The primary outcome was the 30-day readmission rate. Secondary outcomes included a composite of 30-day postoperative major complications and hospital length of stay for hospitalized patients. RESULTS A total of 7505 patients met our study criteria. The ambulatory 2-level lumbar decompression surgery rate increased significantly over the study period from 28% in 2012 to 49% in 2015 (P<0.001). In the matched sample, there was no statistically significant difference in the 30-day readmission rate (odds ratio, 0.82; 95% confidence interval, 0.64-1.04; P=0.097) between the two cohorts; however, the ambulatory cohort had a lower 30-day postoperative major complication rate (odds ratio, 0.55; 95% confidence interval, 0.38-0.79; P=0.002). CONCLUSIONS After 2-level lumbar decompression performed on inpatient versus outpatient basis, the 30-day readmission rate is similar. However, the 30-day postoperative complication rate is significantly lower in the ambulatory setting. The reasons for these differences need further exploration. LEVEL OF EVIDENCE Level III.
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Affiliation(s)
| | | | | | - Abu Minhajuddin
- Clinical Sciences, University of Texas Southwestern Medical Center
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47
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Nguyen MH, Patel K, West J, Scharschmidt T, Chetta M, Schulz S, Mendel E, Valerio IL. A multidisciplinary approach to complex oncological spine coverage in high-risk patients. J Neurosurg Spine 2021; 34:277-282. [PMID: 33096531 DOI: 10.3171/2020.6.spine2024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 06/11/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The consequences of failed spinal hardware secondary to wound complications can increase the burden on the patient while also significantly escalating the cost of care. The objective of this study was to demonstrate the effectiveness of a protocol-based multidisciplinary approach in optimizing wound outcome in complex oncological spine care patients. METHODS A retrospective consecutive case series was performed from 2015 to 2019 of all patients who underwent oncological spine surgery. A protocol was established to identify oncological patients at high risk for potential wound complications. Preoperative and postoperative treatment plans were developed by the multidisciplinary tumor board team members. Wound healing risk factors such as diabetes, obesity, prior spine surgery, pre- or postoperative chemotherapy or radiation exposure, perioperative steroid use, and poor nutritional status were recorded. Operative details, including the regions of spinal involvement, presence of instrumentation, and number of vertebral levels operated on, were reviewed. Primary outcomes were the length of hospitalization and major (requiring reoperation) and minor wound complications in the setting of the aforementioned identified risk factors. RESULTS A total of 102 oncological cases were recorded during the 5-year study period. Of these patients, 99 had local muscle flap reconstruction with layered closure over their surgical hardware. The prevalence of smoking, diabetes, and previous spine surgery for the cohort was 21.6%, 20.6%, and 27.5%, respectively. Radiation exposure was seen in 72.5% of patients (37.3% preoperative vs 48% postoperative exposure). Chemotherapy was given to 66.7% of the patients (49% preoperatively and 30.4% postoperatively). The rate of perioperative steroid exposure was 60.8%. Prealbumin and albumin levels were 15.00 ± 7.47 mg/dL and 3.23 ± 0.43 mg/dL, respectively. Overall, an albumin level of < 3.5 mg/dL and BMI < 18.5 were seen in 64.7% and 13.7% of the patients, respectively. The mean number of vertebral levels involved was 6.76 ± 2.37 levels. Instrumentation of 7 levels or more was seen in 52.9% of patients. The average spinal wound defect size was 22.06 ± 7.79 cm. The rate of minor wound complications, including superficial skin breakdown (epidermolysis) and nonoperative seromas, was 6.9%, whereas that for major complications requiring reoperation within 90 days of surgery was 2.9%. CONCLUSIONS A multidisciplinary team approach utilized in complex multilevel oncological spine reconstruction surgery optimizes surgical outcomes, reduces morbidities, and improves care and satisfaction in patients with known risk factors.
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Affiliation(s)
| | | | - Julie West
- Departments of1Plastic and Reconstructive Surgery
| | - Thomas Scharschmidt
- 3Orthopedic Surgery, The Ohio State Wexner Medical Center, Columbus, Ohio; and
| | | | | | | | - Ian L Valerio
- 4Division of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
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Wang TY, Price M, Mehta VA, Bergin SM, Sankey EW, Foster N, Erickson M, Gupta DK, Gottfried ON, Karikari IO, Than KD, Goodwin CR, Shaffrey CI, Abd-El-Barr MM. Preoperative optimization for patients undergoing elective spine surgery. Clin Neurol Neurosurg 2021; 202:106445. [PMID: 33454498 DOI: 10.1016/j.clineuro.2020.106445] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 09/21/2020] [Accepted: 12/17/2020] [Indexed: 01/16/2023]
Affiliation(s)
- Timothy Y Wang
- Department of Neurosurgery, Division of Spine, Duke University Medical Center, Durham, NC, USA
| | - Meghan Price
- Department of Neurosurgery, Division of Spine, Duke University Medical Center, Durham, NC, USA
| | - Vikram A Mehta
- Department of Neurosurgery, Division of Spine, Duke University Medical Center, Durham, NC, USA
| | - Stephen M Bergin
- Department of Neurosurgery, Division of Spine, Duke University Medical Center, Durham, NC, USA
| | - Eric W Sankey
- Department of Neurosurgery, Division of Spine, Duke University Medical Center, Durham, NC, USA
| | - Norah Foster
- Department of Orthopedic Surgery, Division of Spine, Duke University Medical Center, Durham, NC, USA
| | - Melissa Erickson
- Department of Orthopedic Surgery, Division of Spine, Duke University Medical Center, Durham, NC, USA
| | - Dhanesh K Gupta
- Department of Anesthesiology, Division of Neuroanesthesiology, Duke University Medical Center, Durham, NC, USA
| | - Oren N Gottfried
- Department of Neurosurgery, Division of Spine, Duke University Medical Center, Durham, NC, USA
| | - Isaac O Karikari
- Department of Neurosurgery, Division of Spine, Duke University Medical Center, Durham, NC, USA
| | - Khoi D Than
- Department of Neurosurgery, Division of Spine, Duke University Medical Center, Durham, NC, USA
| | - C Rory Goodwin
- Department of Neurosurgery, Division of Spine, Duke University Medical Center, Durham, NC, USA
| | - Christopher I Shaffrey
- Department of Neurosurgery, Division of Spine, Duke University Medical Center, Durham, NC, USA
| | - Muhammad M Abd-El-Barr
- Department of Neurosurgery, Division of Spine, Duke University Medical Center, Durham, NC, USA.
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Benton JA, Mowrey WB, Ramos RDLG, Weiss BT, Gelfand Y, Castro-Rivas E, Williams L, Headlam M, Udemba A, Gitkind AI, Krystal JD, Cho W, Kinon MD, Yassari R, Yanamadala V. A Multidisciplinary Spine Surgical Indications Conference Leads to Alterations in Surgical Plans in a Significant Number of Cases: A Case Series. Spine (Phila Pa 1976) 2021; 46:E48-E55. [PMID: 32991516 DOI: 10.1097/brs.0000000000003715] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Case series. OBJECTIVE To evaluate the impact of a multidisciplinary spine surgery indications conference (MSSIC) on surgical planning for elective spine surgeries. SUMMARY OF BACKGROUND DATA Identifying methods for pairing the proper patient with the optimal intervention is of the utmost importance for improving spine care and patient outcomes. Prior studies have evaluated the utility of multidisciplinary spine conferences for patient management, but none have evaluated the impact of a MSSIC on surgical planning and decision making. METHODS We implemented a mandatory weekly MSSIC with all spine surgeons at our institution. Each elective spine surgery in the upcoming week is presented. Subsequently, a group consensus decision is achieved regarding the best treatment option based on the expertise and opinions of the participating surgeons. We reviewed cases presented at the MSSIC from September 2019 to December 2019. We compared the surgeon's initial proposed surgery for a patient with the conference attendees' consensus decision on the best treatment and measured compliance rates with the group's recommended treatment. RESULTS The conference reviewed 100 patients scheduled for elective spine surgery at our indications conference during the study period. Surgical plans were recommended for alteration in 19 cases (19%) with the proportion statistically significant from zero indicated by a binomial test (P < 0.001). The median absolute change in the invasiveness index of the altered procedures was 3 (interquartile range [IQR] 1-4). Participating surgeons complied with the group's recommendation in 96.5% of cases. CONCLUSION In conjunction with other multidisciplinary methods, MSSICs can lead to surgical planning alterations in a significant number of cases. This could potentially result in better selection of surgical candidates and procedures for particular patients. Although long-term patient outcomes remain to be evaluated, this care model will likely play an integral role in optimizing the care spine surgeons provide patients. LEVEL OF EVIDENCE 4.
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Affiliation(s)
- Joshua A Benton
- Center for Surgical Optimization, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Spinal Disorders Study Group, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Department of Neurological Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
| | - Wenzhu B Mowrey
- Department of Epidemiology and Public Health, Albert Einstein College of Medicine, Bronx, New York, NY
| | - Rafael De La Garza Ramos
- Center for Surgical Optimization, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Spinal Disorders Study Group, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Department of Neurological Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
| | - Brandon T Weiss
- Center for Surgical Optimization, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Spinal Disorders Study Group, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Department of Neurological Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
| | - Yaroslav Gelfand
- Center for Surgical Optimization, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Spinal Disorders Study Group, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Department of Neurological Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
| | - Erida Castro-Rivas
- Center for Surgical Optimization, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Spinal Disorders Study Group, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Department of Neurological Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
| | - Lavinia Williams
- Center for Surgical Optimization, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Spinal Disorders Study Group, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Department of Neurological Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
| | - Mark Headlam
- Center for Surgical Optimization, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Spinal Disorders Study Group, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Department of Neurological Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
| | - Adaobi Udemba
- Center for Surgical Optimization, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Spinal Disorders Study Group, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Department of Neurological Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
| | - Andrew I Gitkind
- Department of Rehabilitation Medicine, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
| | - Jonathan D Krystal
- Department of Orthopaedic Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
| | - Woojin Cho
- Department of Orthopaedic Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
| | - Merritt D Kinon
- Center for Surgical Optimization, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Spinal Disorders Study Group, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Department of Neurological Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
| | - Reza Yassari
- Center for Surgical Optimization, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Spinal Disorders Study Group, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Department of Neurological Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
| | - Vijay Yanamadala
- Center for Surgical Optimization, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Spinal Disorders Study Group, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
- Department of Neurological Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, NY
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Elia C, Takayanagi A, Arvind V, Goodmanson R, von Glinski A, Pierre C, Sung J, Qutteineh B, Jung E, Chapman J, Oskouian R. Risk Factors Associated with 90-Day Readmissions Following Occipitocervical Fusion-A Nationwide Readmissions Database Study. World Neurosurg 2020; 147:e247-e254. [PMID: 33321249 DOI: 10.1016/j.wneu.2020.12.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 12/04/2020] [Accepted: 12/05/2020] [Indexed: 11/16/2022]
Abstract
BACKGROUND Occipitocervical fusion (OCF) procedures are increasing due to an aging population and the prevalence of trauma, rheumatoid arthritis, and tumors. Reoperation rates and readmission risk factors for cervical fusions have been established, but in relation to OCF they have not been explored. This study investigates the patterns of readmissions and complications following OCF using a national database. METHODS The 2016 U.S. Nationwide Readmissions Database was used for sample collection. Adults (>18 years) who underwent OCF were identified using the 2016 ICD-10 coding system, and we examined the readmission rates (30-day and 90-day) and reoperation rates. RESULTS Between January and September 2016, a total of 477 patients underwent OCF; the 30-day and 90-day readmission rates were 10.4% and 22.4%, respectively. The 90-day reoperation rate related to the index surgery was 5.7%. Mean age (68.58 years) was significantly greater in the readmitted group versus nonreadmitted group (61.76 years) (P < 0.001). The readmitted group had a significantly higher Charlson Comorbidity Index and Elixhauser Comorbidity Index (5.00 and 2.41, respectively) than the nonreadmitted group (3.25 and 1.15, respectively; P < 0.001). Nonelective OCF showed a higher readmission rate (29.18%) versus elective OCF (12.23%) (P < 0.001). Medicare and Medicaid patients showed the highest rates of readmission (27.27% and 20.41%, respectively). Readmitted patients had higher total health care costs. CONCLUSIONS Nonelective OCF was found to have a readmission rate of almost 2½× that of elective OCF. Understanding risk factors associated with OCF will help with operative planning and patient optimization.
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Affiliation(s)
- Christopher Elia
- Division of Neurosurgery, Riverside University Health Systems, Moreno Valley, California, USA; Swedish Neuroscience Institute, Swedish Medical Center, Seattle, Washington, USA; Seattle Science Foundation, Seattle, Washington, USA
| | - Ariel Takayanagi
- Division of Neurosurgery, Riverside University Health Systems, Moreno Valley, California, USA
| | - Varun Arvind
- Department of Orthopaedic Surgery, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Ryan Goodmanson
- Swedish Neuroscience Institute, Swedish Medical Center, Seattle, Washington, USA; Seattle Science Foundation, Seattle, Washington, USA
| | - Alexander von Glinski
- Swedish Neuroscience Institute, Swedish Medical Center, Seattle, Washington, USA; Hansjörg Wyss Hip and Pelvic Center, Swedish Medical Center, Seattle, Washington, USA; Seattle Science Foundation, Seattle, Washington, USA; Department of Trauma Surgery, BG University Hospital Bergmannsheil, Bochum, Germany
| | - Clifford Pierre
- Swedish Neuroscience Institute, Swedish Medical Center, Seattle, Washington, USA; Seattle Science Foundation, Seattle, Washington, USA.
| | - Jeanju Sung
- Swedish Neuroscience Institute, Swedish Medical Center, Seattle, Washington, USA
| | - Bilal Qutteineh
- Swedish Neuroscience Institute, Swedish Medical Center, Seattle, Washington, USA; Seattle Science Foundation, Seattle, Washington, USA
| | - Edward Jung
- Swedish Neuroscience Institute, Swedish Medical Center, Seattle, Washington, USA; Seattle Science Foundation, Seattle, Washington, USA
| | - Jens Chapman
- Swedish Neuroscience Institute, Swedish Medical Center, Seattle, Washington, USA
| | - Rod Oskouian
- Swedish Neuroscience Institute, Swedish Medical Center, Seattle, Washington, USA; Seattle Science Foundation, Seattle, Washington, USA
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