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Malhotra AK, Evaniew N, Dea N, Fisher CG, Street JT, Cadotte DW, Jacobs WB, Thomas KC, Attabib N, Manson N, Hall H, Bailey CS, Nataraj A, Phan P, Rampersaud YR, Paquet J, Weber MH, Christie SD, McIntosh G, Wilson JR. The Effects of Peri-Operative Adverse Events on Clinical and Patient-Reported Outcomes After Surgery for Degenerative Cervical Myelopathy: An Observational Cohort Study from the Canadian Spine Outcomes and Research Network. Neurosurgery 2024:00006123-990000000-01080. [PMID: 38465953 DOI: 10.1227/neu.0000000000002896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 01/08/2024] [Indexed: 03/12/2024] Open
Abstract
BACKGROUND AND OBJECTIVES There is a lack of data examining the effects of perioperative adverse events (AEs) on long-term outcomes for patients undergoing surgery for degenerative cervical myelopathy. We aimed to investigate associations between the occurrence of perioperative AEs and coprimary outcomes: (1) modified Japanese Orthopaedic Association (mJOA) score and (2) Neck Disability Index (NDI) score. METHODS We analyzed data from 800 patients prospectively enrolled in the Canadian Spine Outcomes and Research Network multicenter observational study. The Spine AEs Severity system was used to collect intraoperative and postoperative AEs. Patients were assessed at up to 2 years after surgery using the NDI and the mJOA scale. We used a linear mixed-effect regression to assess the influence of AEs on longitudinal outcome measures as well as multivariable logistic regression to assess factors associated with meeting minimal clinically important difference (MCID) thresholds at 1 year. RESULTS There were 167 (20.9%) patients with minor AEs and 36 (4.5%) patients with major AEs. The occurrence of major AEs was associated with an average increase in NDI of 6.8 points (95% CI: 1.1-12.4, P = .019) and reduction of 1.5 points for mJOA scores (95% CI: -2.3 to -0.8, P < .001) up to 2 years after surgery. Occurrence of major AEs reduced the odds of patients achieving MCID targets at 1 year after surgery for mJOA (odds ratio 0.23, 95% CI: 0.086-0.53, P = .001) and for NDI (odds ratio 0.34, 95% CI: 0.11-0.84, P = .032). CONCLUSION Major AEs were associated with reduced functional gains and worse recovery trajectories for patients undergoing surgery for degenerative cervical myelopathy. Occurrence of major AEs reduced the probability of achieving mJOA and NDI MCID thresholds at 1 year. Both minor and major AEs significantly increased health resource utilization by reducing the proportion of discharges home and increasing length of stay.
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Affiliation(s)
- Armaan K Malhotra
- Division of Neurosurgery, Unity Health, University of Toronto, Toronto, Ontario, Canada
- Institute of Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
| | - Nathan Evaniew
- University of Calgary Spine Program, University of Calgary, Alberta, Canada
| | - Nicolas Dea
- Department of Orthopaedic Surgery, Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Vancouver, British Columbia, Canada
| | - Charles G Fisher
- Department of Orthopaedic Surgery, Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Vancouver, British Columbia, Canada
| | - John T Street
- Department of Orthopaedic Surgery, Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Vancouver, British Columbia, Canada
| | - David W Cadotte
- University of Calgary Spine Program, University of Calgary, Alberta, Canada
| | - W Bradley Jacobs
- University of Calgary Spine Program, University of Calgary, Alberta, Canada
| | - Kenneth C Thomas
- University of Calgary Spine Program, University of Calgary, Alberta, Canada
| | - Najmedden Attabib
- Division of Neurosurgery, Zone 2, Horizon Health Network, Canada East Spine Centre, Saint John, New Brunswick, Canada
| | - Neil Manson
- Division of Orthopaedics, Canada East Spine Centre and Horizon Health Network, Saint John, New Brunswick, Canada
| | - Hamilton Hall
- Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Christopher S Bailey
- Department of Surgery, London Health Science Centre Combined Neurosurgical and Orthopaedic Spine Program, Schulich School of Medicine, Western University, London, Ontario, Canada
| | - Andrew Nataraj
- Division of Neurosurgery, University of Alberta, Edmonton, Alberta, Canada
| | - Philippe Phan
- Division of Orthopaedic Surgery, The Ottawa Hospital, Civic Campus, University of Ottawa, Ottawa, Ontario, Canada
| | - Y Raja Rampersaud
- Department of Surgery, Schroeder Arthritis Institute, Krembil Research Institute, Orthopaedics, University of Toronto, Toronto, Ontario, Canada
| | - Jerome Paquet
- Centre de Recherche CHU de Quebec, CHU de Quebec-Université Laval, Quebec City, Quebec, Canada
| | - Michael H Weber
- Division of Orthopaedics, Department of Surgery, Montreal General Hospital, McGill University, Montreal, Quebec, Canada
| | - Sean D Christie
- Department of Surgery, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Greg McIntosh
- Canadian Spine Outcomes and Research Network, Markdale, Ontario, Canada
| | - Jefferson R Wilson
- Division of Neurosurgery, Unity Health, University of Toronto, Toronto, Ontario, Canada
- Institute of Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
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2
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Fallah N, Noonan VK, Waheed Z, Charest-Morin R, Dandurand C, Cheng C, Ailon T, Dea N, Paquette S, Street JT, Fisher C, Dvorak MF, Kwon BK. Pattern of neurological recovery in persons with an acute cervical spinal cord injury over the first 14 days post injury. Front Neurol 2023; 14:1278826. [PMID: 38169683 PMCID: PMC10758406 DOI: 10.3389/fneur.2023.1278826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Accepted: 10/31/2023] [Indexed: 01/05/2024] Open
Abstract
Introduction Following a traumatic spinal cord injury (SCI) it is critical to document the level and severity of injury. Neurological recovery occurs dynamically after injury and a baseline neurological exam offers a snapshot of the patient's impairment at that time. Understanding when this exam occurs in the recovery process is crucial for discussing prognosis and acute clinical trial enrollment. The objectives of this study were to: (1) describe the trajectory of motor recovery in persons with acute cervical SCI in the first 14 days post-injury; and (2) evaluate if the timing of the baseline neurological assessment in the first 14 days impacts the amount of motor recovery observed. Methods Data were obtained from the Rick Hansen Spinal Cord Injury Registry (RHSCIR) site in Vancouver and additional neurological data was extracted from medical charts. Participants with a cervical injury (C1-T1) who had a minimum of three exams (including a baseline and discharge exam) were included. Data on the upper-extremity motor score (UEMS), total motor score (TMS) and American Spinal Injury Association (ASIA) Impairment Scale (AIS) were included. A linear mixed-effect model with additional variables (AIS, level of injury, UEMS, time, time2, and TMS) was used to explore the pattern and amount of motor recovery over time. Results Trajectories of motor recovery in the first 14 days post-injury showed significant improvements in both TMS and UEMS for participants with AIS B, C, and D injuries, but was not different for high (C1-4) vs. low (C5-T1) cervical injuries or AIS A injuries. The timing of the baseline neurological examination significantly impacted the amount of motor recovery in participants with AIS B, C, and D injuries. Discussion Timing of baseline neurological exams was significantly associated with the amount of motor recovery in cervical AIS B, C, and D injuries. Studies examining changes in neurological recovery should consider stratifying by severity and timing of the baseline exam to reduce bias amongst study cohorts. Future studies should validate these estimates for cervical AIS B, C, and D injuries to see if they can serve as an "adjustment factor" to control for differences in the timing of the baseline neurological exam.
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Affiliation(s)
- Nader Fallah
- Praxis Spinal Cord Institute, Vancouver, BC, Canada
- Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | | | - Zeina Waheed
- Praxis Spinal Cord Institute, Vancouver, BC, Canada
| | - Raphaele Charest-Morin
- Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia, Vancouver, BC, Canada
| | - Charlotte Dandurand
- Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia, Vancouver, BC, Canada
| | | | - Tamir Ailon
- Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia, Vancouver, BC, Canada
| | - Nicolas Dea
- Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia, Vancouver, BC, Canada
| | - Scott Paquette
- Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia, Vancouver, BC, Canada
| | - John T. Street
- Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia, Vancouver, BC, Canada
| | - Charles Fisher
- Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia, Vancouver, BC, Canada
| | - Marcel F. Dvorak
- Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia, Vancouver, BC, Canada
- International Collaboration on Repair Discoveries (ICORD), University of British Columbia, Vancouver, BC, Canada
| | - Brian K. Kwon
- Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia, Vancouver, BC, Canada
- International Collaboration on Repair Discoveries (ICORD), University of British Columbia, Vancouver, BC, Canada
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Moskven E, Banaszek D, Sayre EC, Gara A, Bryce E, Wong T, Ailon T, Charest-Morin R, Dea N, Dvorak MF, Fisher CG, Kwon BK, Paquette S, Street JT. Effectiveness of prophylactic intranasal photodynamic disinfection therapy and chlorhexidine gluconate body wipes for surgical site infection prophylaxis in adult spine surgery. Can J Surg 2023; 66:E550-E560. [PMID: 37967971 PMCID: PMC10664804 DOI: 10.1503/cjs.016922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/07/2023] [Indexed: 11/17/2023] Open
Abstract
BACKGROUND Current measures to prevent spinal surgical site infection (SSI) lack compliance and lead to antimicrobial resistance. We aimed to examine the effectiveness of bundled preoperative intranasal photodynamic disinfection therapy (nPDT) and chlorhexidine gluconate (CHG) body wipes in the prophylaxis of spine SSIs in adults, as well as determine our institutional savings attributable to the use of this strategy and identify adverse events reported with nPDT-CHG. METHODS We performed a 14-year prospective observational interrupted time-series study in adult (age > 18 yr) patients undergoing emergent or elective spine surgery with 3 time-specific cohorts: before rollout of our institution's nPDT-CHG program (2006-2010), during rollout (2011-2014) and after rollout (2015-2019). We used unadjusted bivariate analysis to test for temporal changes across patient and surgical variables, and segmented regression to estimate the effect of nPDT-CHG on the annual SSI incidence rates per period. We used 2 models to estimate the cost of nPDT-CHG to prevent 1 additional SSI per year and the annual cumulative cost savings through SSI prevention. RESULTS Over the study period, 13 493 patients (mean 964 per year) underwent elective or emergent spine surgery. From 2006 to 2019, the mean age, mean Charlson Comorbidity Index (CCI) score and mean Spine Surgical Invasiveness Index (SSII) score increased from 48.4 to 58.1 years, from 1.7 to 2.6, and from 15.4 to 20.5, respectively (p < 0.001). Unadjusted analysis confirmed a significant decrease in the annual number (74.6 to 26.8) and incidence (7.98% to 2.67%) of SSIs with nPDT-CHG (p < 0.001). After adjustment for mean age, mean CCI score and mean SSII score, segmented regression showed an absolute reduction in the annual SSI incidence rate of 3.36% per year (p < 0.001). The estimated annual cost to prevent 1 additional SSI per year was about $1350-$1650, and the estimated annual cumulative cost savings were $2 484 856-$2 495 016. No adverse events were reported with nPDT-CHG. CONCLUSION Preoperative nPDT-CHG administration is an effective prophylactic strategy for spinal SSIs, with significant cost savings. Given its rapid action, minimal risk of antimicrobial resistance, broad-spectrum activity and high compliance rate, preoperative nPDT-CHG decolonization should be the standard of care for all patients undergoing emergent or elective spine surgery.
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Affiliation(s)
- Eryck Moskven
- From the Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, BC (Moskven, Banaszek, Ailon, Charest-Morin, Dea, Dvorak, Fisher, Kwon, Paquette, Street); Arthritis Research Canada, Richmond, BC (Sayre); the Department of Infection Control, Quality and Patient Safety, Vancouver General Hospital, Vancouver, BC (Gara); and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC (Bryce, Wong)
| | - Daniel Banaszek
- From the Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, BC (Moskven, Banaszek, Ailon, Charest-Morin, Dea, Dvorak, Fisher, Kwon, Paquette, Street); Arthritis Research Canada, Richmond, BC (Sayre); the Department of Infection Control, Quality and Patient Safety, Vancouver General Hospital, Vancouver, BC (Gara); and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC (Bryce, Wong)
| | - Eric C Sayre
- From the Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, BC (Moskven, Banaszek, Ailon, Charest-Morin, Dea, Dvorak, Fisher, Kwon, Paquette, Street); Arthritis Research Canada, Richmond, BC (Sayre); the Department of Infection Control, Quality and Patient Safety, Vancouver General Hospital, Vancouver, BC (Gara); and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC (Bryce, Wong)
| | - Aleksandra Gara
- From the Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, BC (Moskven, Banaszek, Ailon, Charest-Morin, Dea, Dvorak, Fisher, Kwon, Paquette, Street); Arthritis Research Canada, Richmond, BC (Sayre); the Department of Infection Control, Quality and Patient Safety, Vancouver General Hospital, Vancouver, BC (Gara); and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC (Bryce, Wong)
| | - Elizabeth Bryce
- From the Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, BC (Moskven, Banaszek, Ailon, Charest-Morin, Dea, Dvorak, Fisher, Kwon, Paquette, Street); Arthritis Research Canada, Richmond, BC (Sayre); the Department of Infection Control, Quality and Patient Safety, Vancouver General Hospital, Vancouver, BC (Gara); and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC (Bryce, Wong)
| | - Titus Wong
- From the Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, BC (Moskven, Banaszek, Ailon, Charest-Morin, Dea, Dvorak, Fisher, Kwon, Paquette, Street); Arthritis Research Canada, Richmond, BC (Sayre); the Department of Infection Control, Quality and Patient Safety, Vancouver General Hospital, Vancouver, BC (Gara); and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC (Bryce, Wong)
| | - Tamir Ailon
- From the Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, BC (Moskven, Banaszek, Ailon, Charest-Morin, Dea, Dvorak, Fisher, Kwon, Paquette, Street); Arthritis Research Canada, Richmond, BC (Sayre); the Department of Infection Control, Quality and Patient Safety, Vancouver General Hospital, Vancouver, BC (Gara); and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC (Bryce, Wong)
| | - Raphaële Charest-Morin
- From the Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, BC (Moskven, Banaszek, Ailon, Charest-Morin, Dea, Dvorak, Fisher, Kwon, Paquette, Street); Arthritis Research Canada, Richmond, BC (Sayre); the Department of Infection Control, Quality and Patient Safety, Vancouver General Hospital, Vancouver, BC (Gara); and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC (Bryce, Wong)
| | - Nicolas Dea
- From the Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, BC (Moskven, Banaszek, Ailon, Charest-Morin, Dea, Dvorak, Fisher, Kwon, Paquette, Street); Arthritis Research Canada, Richmond, BC (Sayre); the Department of Infection Control, Quality and Patient Safety, Vancouver General Hospital, Vancouver, BC (Gara); and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC (Bryce, Wong)
| | - Marcel F Dvorak
- From the Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, BC (Moskven, Banaszek, Ailon, Charest-Morin, Dea, Dvorak, Fisher, Kwon, Paquette, Street); Arthritis Research Canada, Richmond, BC (Sayre); the Department of Infection Control, Quality and Patient Safety, Vancouver General Hospital, Vancouver, BC (Gara); and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC (Bryce, Wong)
| | - Charles G Fisher
- From the Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, BC (Moskven, Banaszek, Ailon, Charest-Morin, Dea, Dvorak, Fisher, Kwon, Paquette, Street); Arthritis Research Canada, Richmond, BC (Sayre); the Department of Infection Control, Quality and Patient Safety, Vancouver General Hospital, Vancouver, BC (Gara); and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC (Bryce, Wong)
| | - Brian K Kwon
- From the Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, BC (Moskven, Banaszek, Ailon, Charest-Morin, Dea, Dvorak, Fisher, Kwon, Paquette, Street); Arthritis Research Canada, Richmond, BC (Sayre); the Department of Infection Control, Quality and Patient Safety, Vancouver General Hospital, Vancouver, BC (Gara); and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC (Bryce, Wong)
| | - Scott Paquette
- From the Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, BC (Moskven, Banaszek, Ailon, Charest-Morin, Dea, Dvorak, Fisher, Kwon, Paquette, Street); Arthritis Research Canada, Richmond, BC (Sayre); the Department of Infection Control, Quality and Patient Safety, Vancouver General Hospital, Vancouver, BC (Gara); and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC (Bryce, Wong)
| | - John T Street
- From the Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, BC (Moskven, Banaszek, Ailon, Charest-Morin, Dea, Dvorak, Fisher, Kwon, Paquette, Street); Arthritis Research Canada, Richmond, BC (Sayre); the Department of Infection Control, Quality and Patient Safety, Vancouver General Hospital, Vancouver, BC (Gara); and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC (Bryce, Wong)
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Moskven E, Lasry O, Singh S, Flexman AM, Street JT, Dea N, Fisher CG, Ailon T, Dvorak MF, Kwon BK, Paquette SJ, Charest-Morin R. The Role of Frailty and Sarcopenia in Predicting Major Adverse Events, Length of Stay and Reoperation Following En Bloc Resection of Primary Tumours of the Spine. Global Spine J 2023:21925682231173360. [PMID: 37118871 DOI: 10.1177/21925682231173360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/30/2023] Open
Abstract
STUDY DESIGN Retrospective observational cohort study. OBJECTIVE En bloc resection for primary tumours of the spine is associated with a high rate of adverse events (AEs). The objective was to explore the relationship between frailty/sarcopenia and major perioperative AEs, length of stay (LOS), and unplanned reoperation following en bloc resection of primary spinal tumours. METHODS This is a unicentre study consisting of adult patients undergoing en bloc resection for a primary spine tumor. Frailty was calculated with the modified frailty index (mFI) and spine tumour frailty index (STFI). Sarcopenia was quantified with the total psoas area/vertebral body area ratio (TPA/VB) at L3 and L4. Univariable regression analysis was used to quantify the association between frailty/sarcopenia and major perioperative AEs, LOS and unplanned reoperation. RESULTS 95 patients met the inclusion criteria. The mFI and STFI identified a frailty prevalence of 3% and 18%. Mean CT TPA/VB ratios were 1.47 (SD ± .05) and 1.83 (SD ± .06) at L3 and L4. Inter-observer reliability was .93 and .99 for CT and MRI L3 and L4 TPA/VB ratios. Unadjusted analysis demonstrated sarcopenia and mFI did not predict perioperative AEs, LOS or unplanned reoperation. Frailty defined by an STFI score ≥2 predicted unplanned reoperation for surgical site infection (SSI) (P < .05). CONCLUSIONS The STFI was only associated with unplanned reoperation for SSI on unadjusted analysis, while the mFI and sarcopenia were not predictive of any outcome. Further studies are needed to investigate the relationship between frailty, sarcopenia and perioperative outcomes following en bloc resection of primary spinal tumors.
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Affiliation(s)
- Eryck Moskven
- Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, University of British Columbia, Vancouver, BC, Canada
| | - Oliver Lasry
- Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, University of British Columbia, Vancouver, BC, Canada
- Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada
- Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, QC, Canada
| | - Supriya Singh
- Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, University of British Columbia, Vancouver, BC, Canada
| | - Alana M Flexman
- Department of Anaesthesiology, Pharmacology and Therapeutics, University of British Columbia, Vancouver, BC, Canada
- Department of Anaesthesiology and Perioperative Care, St Paul's Hospital, Vancouver, BC, Canada
| | - John T Street
- Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, University of British Columbia, Vancouver, BC, Canada
| | - Nicolas Dea
- Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, University of British Columbia, Vancouver, BC, Canada
| | - Charles G Fisher
- Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, University of British Columbia, Vancouver, BC, Canada
| | - Tamir Ailon
- Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, University of British Columbia, Vancouver, BC, Canada
| | - Marcel F Dvorak
- Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, University of British Columbia, Vancouver, BC, Canada
| | - Brian K Kwon
- Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, University of British Columbia, Vancouver, BC, Canada
| | - Scott J Paquette
- Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, University of British Columbia, Vancouver, BC, Canada
| | - Raphaële Charest-Morin
- Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, University of British Columbia, Vancouver, BC, Canada
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5
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Moskven E, Daly CD, Nevin J, Bourassa-Moreau É, Ailon T, Charest-Morin R, Dea N, Dvorak MF, Fisher CG, Kwon BK, Paquette S, Street JT. Generic versus disease-specific adverse event reporting: a comparison of the NSQIP and SAVES databases for the identification of acute care adverse events in adult spine surgery. J Neurosurg Spine 2023:1-8. [PMID: 37119107 DOI: 10.3171/2023.3.spine221437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 03/14/2023] [Indexed: 04/30/2023]
Abstract
OBJECTIVE The accurate identification and reporting of adverse events (AEs) is crucial for quality improvement. A myriad of AE systems are utilized. There is a lack of understanding of the differences between prospective versus retrospective, disease-specific versus generic, and point-of-care versus chart-abstracted systems. The objective of this study was to compare the benefits and limitations between the prospective, disease-specific, point-of-care Spine Adverse Events Severity System (SAVES) and the retrospective, generic, and chart-abstracted National Surgical Quality Improvement Program (NSQIP) for the identification and reporting of AEs in adult patients undergoing spinal surgery. METHODS The authors conducted an observational ambidirectional cohort study of adult patients undergoing spine surgery other than for trauma between 2011 and 2019 in a quaternary spine center. Patients were identified using Current Procedural Terminology codes in the NSQIP database and matched using unique medical record numbers to their corresponding record in SAVES. The incidence of AEs and per-patient AEs as recorded in NSQIP and SAVES was the primary outcome of interest. Comparable AEs were identified by matching NSQIP AEs to equivalent ones in SAVES. Chi-square tests were used to test for significant differences in the incidence of overall and comparable AEs between the databases. RESULTS There were 2198 patients identified in NSQIP, of whom 2033 also had complete records in SAVES. SAVES identified 5342 individual AEs in 1484 patients (73%) compared with 1291 individual AEs in 807 patients (39.7%) with the NSQIP database (p < 0.001). SAVES identified 250 intraoperative and 422 postoperative spine-specific AEs that NSQIP did not record. NSQIP captured a greater number of AEs beyond 30 days, including prolonged length of stay > 30 days, unplanned readmission, unplanned reoperation, and death later than 30 days after surgery compared with SAVES. CONCLUSIONS SAVES captures a greater incidence of peri- and intraoperative spine-specific AEs than NSQIP, while NSQIP identifies a greater number of AEs beyond 30 days. While a prospective, disease-specific, point-of-care AE system such as SAVES is specific for guiding quality improvement in spine surgery, it incurs greater time and financial costs. Conversely, a retrospective, generic, and chart-abstracted system such as NSQIP provides equivocal cross-institutional comparability with reduced time and financial costs. Specific contextual and aim-specific needs should guide the choice and implementation of an AE system.
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Affiliation(s)
- Eryck Moskven
- 1Department of Orthopedic Surgery, Combined Neurosurgical and Orthopedic Spine Program, University of British Columbia; and
| | - Christopher D Daly
- 1Department of Orthopedic Surgery, Combined Neurosurgical and Orthopedic Spine Program, University of British Columbia; and
| | - Jennifer Nevin
- 2Department of Orthopedic Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Étienne Bourassa-Moreau
- 1Department of Orthopedic Surgery, Combined Neurosurgical and Orthopedic Spine Program, University of British Columbia; and
| | - Tamir Ailon
- 1Department of Orthopedic Surgery, Combined Neurosurgical and Orthopedic Spine Program, University of British Columbia; and
| | - Raphaële Charest-Morin
- 1Department of Orthopedic Surgery, Combined Neurosurgical and Orthopedic Spine Program, University of British Columbia; and
| | - Nicolas Dea
- 1Department of Orthopedic Surgery, Combined Neurosurgical and Orthopedic Spine Program, University of British Columbia; and
| | - Marcel F Dvorak
- 1Department of Orthopedic Surgery, Combined Neurosurgical and Orthopedic Spine Program, University of British Columbia; and
| | - Charles G Fisher
- 1Department of Orthopedic Surgery, Combined Neurosurgical and Orthopedic Spine Program, University of British Columbia; and
| | - Brian K Kwon
- 1Department of Orthopedic Surgery, Combined Neurosurgical and Orthopedic Spine Program, University of British Columbia; and
| | - Scott Paquette
- 1Department of Orthopedic Surgery, Combined Neurosurgical and Orthopedic Spine Program, University of British Columbia; and
| | - John T Street
- 1Department of Orthopedic Surgery, Combined Neurosurgical and Orthopedic Spine Program, University of British Columbia; and
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6
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Dandurand C, Mashayekhi MS, McIntosh G, Street JT, Fisher CG, Finkelstein J, Abraham E, Paquet J, Hall H, Wai E, Fourney DR, Bailey CS, Christie SD, Soroceanu A, Johnson M, Kelly A, Marion TE, Nataraj A, Santaguida C, Warren D, Hogan TG, Manson N, Phan P, Ahn H, Rampersaud YR, Blanchard J, Thomas K, Dea N, Charest-Morin R. Patient, clinical, surgical, and institutional factors associated with length of stay in scheduled degenerative thoracolumbar spine surgery: National Multicenter Cohort Analysis from the Canadian Spine Outcomes and Research Network. J Neurosurg Spine 2022; 38:446-456. [PMID: 36681949 DOI: 10.3171/2022.11.spine22662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 11/15/2022] [Indexed: 01/23/2023]
Abstract
OBJECTIVE Length of stay (LOS) is a contributor to costs and resource utilization. The primary goal of this study was to identify patient, clinical, surgical, and institutional variables that influence LOS after elective surgery for thoracolumbar degenerative pathology. The secondary objective was to examine variability in LOS and institutional strategies used to decrease LOS. METHODS This is a retrospective study of prospectively collected data from a multicentric cohort enrolled in the Canadian Spine Outcomes and Research Network (CSORN) between January 2015 and October 2020 who underwent elective thoracolumbar surgery (discectomy [1 or 2 levels], laminectomy [1 or 2 levels], and posterior instrumented fusion [up to 5 levels]). Prolonged LOS was defined as LOS greater than the median. Logistic regression models were used to determine factors associated with prolonged LOS for each procedure. A survey was sent to the principal investigators of the participating healthcare institutions to understand institutional practices that are used to decrease LOS. RESULTS A total of 3700 patients were included (967 discectomies, 1094 laminectomies, and 1639 fusions). The median LOSs for discectomy, laminectomy, and fusion were 0.0 (IQR 1.0), 1.0 (IQR 2.0), and 4.0 (IQR 2.0) days, respectively. On multivariable analysis, predictors of prolonged LOS for discectomy were having more leg pain, higher Oswestry Disability Index (ODI) scores, symptom duration more than 2 years, having undergone an open procedure, occurrence of an adverse event (AE), and treatment at an institution without protocols to reduce LOS (p < 0.05). Predictors of prolonged LOS for laminectomy were increased age, living alone, higher ODI scores, higher BMI, open procedures, longer operative time, AEs, and treatment at an institution without protocols to reduce LOS (p < 0.05). For posterior instrumented fusion, predictors of prolonged LOS were older age, living alone, more comorbidities, higher ODI scores, longer operative time, AEs, and treatment at an institution without protocols to reduce LOS (p < 0.05). The laminectomy group had the largest variability in LOS (SD 4.4 days, range 0-133 days). Three hundred fifty-four patients (22%) had an LOS above the 75th percentile. Ten institutions (53%) had either Enhanced Recovery After Surgery or standardized protocols in place. CONCLUSIONS Among the factors identified in this study, worse baseline ODI scores, experiencing AEs, and treatment at an institution without protocols aimed at reducing LOS were predictive of prolonged LOS in all surgical groups. The laminectomy group had the largest variability in LOS.
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Affiliation(s)
- Charlotte Dandurand
- 1Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Vancouver, British Columbia
| | - Mohammad S Mashayekhi
- 1Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Vancouver, British Columbia
| | - Greg McIntosh
- 12Canadian Spine Outcomes and Research Network, Canadian Spine Society, Markdale, Ontario
| | - John T Street
- 1Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Vancouver, British Columbia
| | - Charles G Fisher
- 1Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Vancouver, British Columbia
| | - Joel Finkelstein
- 13Department of Surgery, Sunnybrook Health Sciences Centre, Toronto, Ontario
| | - Edward Abraham
- 8Department of Surgery, Dalhousie University, Halifax, Nova Scotia
| | - Jérôme Paquet
- 2Centre Hospitalier Universitaire de Québec, Hôpital Enfant-Jésus, Québec City, Québec
| | - Hamilton Hall
- 9Department of Surgery, University of Toronto, Ontario
| | - Eugene Wai
- 5Department of Surgery, Ottawa Hospital, Ottawa, Ontario
| | - Daryl R Fourney
- 17Department of Surgery, University of Saskatchewan, Saskatoon, Saskatchewan
| | - Christopher S Bailey
- 3London Health Sciences Centre, Combined Neurosurgical and Orthopaedic Spine Program, Western University, London, Ontario
| | - Sean D Christie
- 8Department of Surgery, Dalhousie University, Halifax, Nova Scotia
| | | | - Michael Johnson
- 6Winnipeg Health Sciences Centre, University of Manitoba, Winnipeg, Manitoba
| | - Adrienne Kelly
- 16Department of Surgery, Northern Ontario School of Medicine, Sault Ste. Marie, Ontario
| | - Travis E Marion
- 15Department of Surgery, Thunder Bay Regional Health Science Centre, Thunder Bay, Ontario
| | - Andrew Nataraj
- 4Department of Surgery, University of Alberta Hospital, Edmonton, Alberta
| | | | - Daniel Warren
- 19Department of Neurosurgery, Vancouver Island Health Authority, Victoria, British Columbia; and
| | - Thomas Guy Hogan
- 20Department of Orthopaedic Surgery, Health Sciences Centre, St. John's, Newfoundland and Labrador, Canada
| | - Neil Manson
- 10Department of Surgery, Canada East Spine Centre, Saint John, New Brunswick
| | - Philippe Phan
- 5Department of Surgery, Ottawa Hospital, Ottawa, Ontario
| | - Henry Ahn
- 9Department of Surgery, University of Toronto, Ontario
| | - Y Raja Rampersaud
- 11University Health Network, Toronto Western Hospital, Toronto, Ontario
| | - Jocelyn Blanchard
- 14Department of Surgery, Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Québec
| | | | - Nicolas Dea
- 1Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Vancouver, British Columbia
| | - Raphaële Charest-Morin
- 1Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Vancouver, British Columbia
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7
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Moskven E, Charest-Morin R, Flexman AM, Street JT. The measurements of frailty and their possible application to spinal conditions: a systematic review. Spine J 2022; 22:1451-1471. [PMID: 35385787 DOI: 10.1016/j.spinee.2022.03.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 02/19/2022] [Accepted: 03/28/2022] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Frailty is associated with an increased risk of postoperative adverse events (AEs) within the surgical spine population. Multiple frailty tools have been reported in the surgical spine literature. However, the applicability of these tools remains unclear. PURPOSE Primary objective is to appraise the construct, feasibility, objectivity, and clinimetric properties of frailty tools reported in the surgical spine literature. Secondary objectives included determining the applicability and the most sensitive surgical spine population for each tool. STUDY DESIGN Systematic Review. PATIENT SAMPLE Studies reporting the use of a clinical frailty tool with a defined methodology in the adult surgical population (age ≥18 years). OUTCOME MEASURES Postoperative adverse events (AEs) including mortality, major and minor morbidity, length of stay (LOS), unplanned readmission and reoperation, admission to the Intensive Care Unit (ICU), and adverse discharge disposition; postoperative patient-reported outcomes (health-related quality of life (HRQoL), functional, cognitive, and symptomatic); radiographic outcomes; and postoperative frailty trajectory. METHODS This systematic review was registered with PROSPERO: CRD42019109045. Publications from January 1950 to December 2020 were identified by a comprehensive search of PubMed, Ovid, and Embase, supplemented by manual screening. Studies reporting and validating a frailty tool in the surgical spine population with a measurable outcome were included. Each tool and its clinimetric properties were evaluated using validated criteria and definitions. The applicability of each tool and its most sensitive surgical spine population was determined by panel consensus. Bias was assessed using the Newcastle-Ottawa Scale. RESULTS 47 studies were included in the final qualitative analysis. A total of 14 separate frailty tools were identified, in which 9 tools assessed frailty according to the cumulative deficit definition, while 4 instruments utilized phenotypic or weighted frailty models. One instrument assessed frailty according to the comprehensive geriatric assessment (CGA) model. Twelve measures were validated as risk stratification tools for predicting postoperative AEs, while 1 tool investigated the effect of spine surgery on postoperative frailty trajectory. The modified frailty index (mFI), 5-item mFI, adult spinal deformity frailty index (ASD-FI), FRAIL Scale, and CGA had the most positive ratings for clinimetric properties assessed. CONCLUSIONS The assessment of frailty is important in the surgical decision-making process. Cumulative deficit and weighted frailty instruments are appropriate risk stratification tools. Phenotypic tools are sensitive for capturing the relationship between spinal pathology, spine surgery, and prehabilitation on frailty trajectory. CGA instruments are appropriate screening tools for identifying health deficits susceptible to improvement and guiding optimization strategies. Studies are needed to determine whether spine surgery and prehabilitation are effective interventions to reverse frailty.
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Affiliation(s)
- Eryck Moskven
- Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada.
| | - Raphaële Charest-Morin
- Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Alana M Flexman
- Department of Anaesthesiology, Pharmacology and Therapeutics, University of British Columbia, Vancouver, British Columbia, Canada; Department of Anaesthesiology and Perioperative Care, St. Paul's Hospital/Providence Health Care, Vancouver, British Columbia, Canada
| | - John T Street
- Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
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8
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Fallah N, Noonan VK, Waheed Z, Rivers CS, Plashkes T, Bedi M, Etminan M, Thorogood NP, Ailon T, Chan E, Dea N, Fisher C, Charest-Morin R, Paquette S, Park S, Street JT, Kwon BK, Dvorak MF. Development of a machine learning algorithm for predicting in-hospital and 1-year mortality after traumatic spinal cord injury. Spine J 2022; 22:329-336. [PMID: 34419627 DOI: 10.1016/j.spinee.2021.08.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/15/2021] [Accepted: 08/12/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Current prognostic tools such as the Injury Severity Score (ISS) that predict mortality following trauma do not adequately consider the unique characteristics of traumatic spinal cord injury (tSCI). PURPOSE Our aim was to develop and validate a prognostic tool that can predict mortality following tSCI. STUDY DESIGN Retrospective review of a prospective cohort study. PATIENT SAMPLE Data was collected from 1245 persons with acute tSCI who were enrolled in the Rick Hansen Spinal Cord Injury Registry between 2004 and 2016. OUTCOME MEASURES In-hospital and 1-year mortality following tSCI. METHODS Machine learning techniques were used on patient-level data (n=849) to develop the Spinal Cord Injury Risk Score (SCIRS) that can predict mortality based on age, neurological level and completeness of injury, AOSpine classification of spinal column injury morphology, and Abbreviated Injury Scale scores. Validation of the SCIRS was performed by testing its accuracy in an independent validation cohort (n=396) and comparing its performance to the ISS, a measure which is used to predict mortality following general trauma. RESULTS For 1-year mortality prediction, the values for the Area Under the Receiver Operating Characteristic Curve (AUC) for the development cohort were 0.84 (standard deviation=0.029) for the SCIRS and 0.55 (0.041) for the ISS. For the validation cohort, AUC values were 0.86 (0.051) for the SCIRS and 0.71 (0.074) for the ISS. For in-hospital mortality, AUC values for the development cohort were 0.87 (0.028) and 0.60 (0.050) for the SCIRS and ISS, respectively. For the validation cohort, AUC values were 0.85 (0.054) for the SCIRS and 0.70 (0.079) for the ISS. CONCLUSIONS The SCIRS can predict in-hospital and 1-year mortality following tSCI more accurately than the ISS. The SCIRS can be used in research to reduce bias in estimating parameters and can help adjust for coefficients during model development. Further validation using larger sample sizes and independent datasets is needed to assess its reliability and to evaluate using it as an assessment tool to guide clinical decision-making and discussions with patients and families.
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Affiliation(s)
- Nader Fallah
- Praxis Spinal Cord Institute, 6400-818 West 10th Ave, Vancouver, British Columbia, V5Z 1M9, Canada; Division of Neurology, Department of Medicine, University of British Columbia, Koerner Pavilion, UBC Hospital, S192 - 2211 Wesbrook Mall, V6T 2B5, Vancouver, British Columbia, Canada
| | - Vanessa K Noonan
- Praxis Spinal Cord Institute, 6400-818 West 10th Ave, Vancouver, British Columbia, V5Z 1M9, Canada.
| | - Zeina Waheed
- Praxis Spinal Cord Institute, 6400-818 West 10th Ave, Vancouver, British Columbia, V5Z 1M9, Canada
| | - Carly S Rivers
- Praxis Spinal Cord Institute, 6400-818 West 10th Ave, Vancouver, British Columbia, V5Z 1M9, Canada
| | - Tova Plashkes
- Praxis Spinal Cord Institute, 6400-818 West 10th Ave, Vancouver, British Columbia, V5Z 1M9, Canada
| | - Manekta Bedi
- Praxis Spinal Cord Institute, 6400-818 West 10th Ave, Vancouver, British Columbia, V5Z 1M9, Canada
| | - Mahyar Etminan
- Department of Ophthalmology and Visual Sciences, University of British Columbia, 2329 West Mall, Vancouver, British Columbia, V6T 1Z4, Canada
| | - Nancy P Thorogood
- Praxis Spinal Cord Institute, 6400-818 West 10th Ave, Vancouver, British Columbia, V5Z 1M9, Canada
| | - Tamir Ailon
- Department of Orthopaedics, University of British Columbia, Gordon and Leslie Diamond Health Care Centre, 11th Floor - 2775 Laurel Street, Vancouver, British Columbia, Canada, V5Z 1M9
| | - Elaine Chan
- Praxis Spinal Cord Institute, 6400-818 West 10th Ave, Vancouver, British Columbia, V5Z 1M9, Canada
| | - Nicolas Dea
- Department of Orthopaedics, University of British Columbia, Gordon and Leslie Diamond Health Care Centre, 11th Floor - 2775 Laurel Street, Vancouver, British Columbia, Canada, V5Z 1M9
| | - Charles Fisher
- Department of Orthopaedics, University of British Columbia, Gordon and Leslie Diamond Health Care Centre, 11th Floor - 2775 Laurel Street, Vancouver, British Columbia, Canada, V5Z 1M9
| | - Raphaele Charest-Morin
- Department of Orthopaedics, University of British Columbia, Gordon and Leslie Diamond Health Care Centre, 11th Floor - 2775 Laurel Street, Vancouver, British Columbia, Canada, V5Z 1M9
| | - Scott Paquette
- Department of Orthopaedics, University of British Columbia, Gordon and Leslie Diamond Health Care Centre, 11th Floor - 2775 Laurel Street, Vancouver, British Columbia, Canada, V5Z 1M9
| | - SoEyun Park
- Praxis Spinal Cord Institute, 6400-818 West 10th Ave, Vancouver, British Columbia, V5Z 1M9, Canada
| | - John T Street
- Department of Orthopaedics, University of British Columbia, Gordon and Leslie Diamond Health Care Centre, 11th Floor - 2775 Laurel Street, Vancouver, British Columbia, Canada, V5Z 1M9
| | - Brian K Kwon
- Department of Orthopaedics, University of British Columbia, Gordon and Leslie Diamond Health Care Centre, 11th Floor - 2775 Laurel Street, Vancouver, British Columbia, Canada, V5Z 1M9
| | - Marcel F Dvorak
- Department of Orthopaedics, University of British Columbia, Gordon and Leslie Diamond Health Care Centre, 11th Floor - 2775 Laurel Street, Vancouver, British Columbia, Canada, V5Z 1M9
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9
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Ayling OGS, Ailon T, Street JT, Dea N, McIntosh G, Abraham E, Jacobs WB, Soroceanu A, Johnson MG, Paquet J, Rasoulinejad P, Phan P, Yee A, Christie S, Nataraj A, Glennie RA, Hall H, Manson N, Rampersaud YR, Thomas K, Fisher CG. The Effect of Perioperative Adverse Events on Long-Term Patient-Reported Outcomes After Lumbar Spine Surgery. Neurosurgery 2021. [DOI: 10.1093/neuros/nyaa427_s095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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10
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Ayling OGS, Charest-Morin R, Eagles ME, Ailon T, Street JT, Dea N, McIntosh G, Christie SD, Abraham E, Jacobs WB, Bailey CS, Johnson MG, Attabib N, Jarzem P, Weber M, Paquet J, Finkelstein J, Stratton A, Hall H, Manson N, Rampersaud YR, Thomas K, Fisher CG. National adverse event profile after lumbar spine surgery for lumbar degenerative disorders and comparison of complication rates between hospitals: a CSORN registry study. J Neurosurg Spine 2021; 35:698-703. [PMID: 34416721 DOI: 10.3171/2021.2.spine202150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 02/04/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Previous works investigating rates of adverse events (AEs) in spine surgery have been retrospective, with data collection from administrative databases, and often from single centers. To date, there have been no prospective reports capturing AEs in spine surgery on a national level, with comparison among centers. METHODS The Spine Adverse Events Severity system was used to define the incidence and severity of AEs after spine surgery by using data from the Canadian Spine Outcomes and Research Network (CSORN) prospective registry. Patient data were collected prospectively and during hospital admission for those undergoing elective spine surgery for degenerative conditions. The Spine Adverse Events Severity system defined minor and major AEs as grades 1-2 and 3-6, respectively. RESULTS There were 3533 patients enrolled in this cohort. There were 85 (2.4%) individual patients with at least one major AE and 680 (19.2%) individual patients with at least one minor AE. There were 25 individual patients with 28 major intraoperative AEs and 260 patients with 275 minor intraoperative AEs. Postoperatively there were 61 patients with a total of 80 major AEs. Of the 487 patients with minor AEs postoperatively there were 698 total AEs. The average enrollment was 321 patients (range 47-1237 patients) per site. The rate of major AEs was consistent among sites (mean 2.9% ± 2.4%, range 0%-9.1%). However, the rate of minor AEs varied widely among sites-from 7.9% to 42.5%, with a mean of 18.8% ± 9.7%. The rate of minor AEs varied depending on how they were reported, with surgeon reporting associated with the lowest rates (p < 0.01). CONCLUSIONS The rate of major AEs after lumbar spine surgery is consistent among different sites but the rate of minor AEs appears to vary substantially. The method by which AEs are reported impacts the rate of minor AEs. These data have implications for the detection and reporting of AEs and the design of strategies aimed at mitigating complications.
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Affiliation(s)
- Oliver G S Ayling
- 1Department of Surgery, Vancouver General Hospital/University of British Columbia, Vancouver, British Columbia
| | - Raphaele Charest-Morin
- 1Department of Surgery, Vancouver General Hospital/University of British Columbia, Vancouver, British Columbia
| | | | - Tamir Ailon
- 1Department of Surgery, Vancouver General Hospital/University of British Columbia, Vancouver, British Columbia
| | - John T Street
- 1Department of Surgery, Vancouver General Hospital/University of British Columbia, Vancouver, British Columbia
| | - Nicolas Dea
- 1Department of Surgery, Vancouver General Hospital/University of British Columbia, Vancouver, British Columbia
| | | | - Sean D Christie
- 10Department of Surgery, Dalhousie University, Halifax, Nova Scotia; and
| | - Edward Abraham
- 3Department of Surgery, Canada East Spine Centre, Saint John, New Brunswick
| | | | | | - Michael G Johnson
- 5Departments of Orthopedics and Neurosurgery, University of Manitoba, Winnipeg, Manitoba
| | - Najmedden Attabib
- 10Department of Surgery, Dalhousie University, Halifax, Nova Scotia; and
| | - Peter Jarzem
- 11Department of Surgery, McGill University, Montreal, Quebec, Canada
| | - Michael Weber
- 11Department of Surgery, McGill University, Montreal, Quebec, Canada
| | - Jerome Paquet
- 6Department of Surgery, Laval University, Quebec City, Quebec
| | | | | | - Hamilton Hall
- 9Department of Surgery, University of Toronto, Ontario
| | - Neil Manson
- 3Department of Surgery, Canada East Spine Centre, Saint John, New Brunswick
| | | | | | - Charles G Fisher
- 1Department of Surgery, Vancouver General Hospital/University of British Columbia, Vancouver, British Columbia
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11
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Beauchamp-Chalifour P, Flexman AM, Street JT, Fisher CG, Ailon T, Dvorak MF, Kwon BK, Paquette SJ, Dea N, Charest-Morin R. The impact of frailty on patient-reported outcomes after elective thoracolumbar degenerative spine surgery. J Neurosurg Spine 2021:1-9. [PMID: 34359047 DOI: 10.3171/2021.2.spine201879] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 02/02/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Frailty has been shown to be a risk factor of perioperative adverse events (AEs) in patients undergoing various types of spine surgery. However, the relationship between frailty and patient-reported outcomes (PROs) remains unclear. The primary objective of this study was to determine the impact of frailty on PROs of patients who underwent surgery for thoracolumbar degenerative conditions. The secondary objective was to determine the associations among frailty, baseline PROs, and perioperative AEs. METHODS This was a retrospective study of a prospective cohort of patients older than 55 years who underwent surgery between 2012 and 2018. Data and PROs (collected with EQ-5D, Physical Component Summary [PCS] and Mental Component Summary [MCS] of SF-12, Oswestry Disability Index [ODI], and numeric rating scales [NRS] for back pain and leg pain) of patients treated at a single academic center were extracted from the Canadian Spine Outcomes and Research Network registry. Frailty was calculated using the modified frailty index (mFI), and patients were classified as frail, prefrail, and nonfrail. A generalized estimating equation (GEE) regression model was used to assess the association between baseline frailty status and PRO measures at 3 and 12 months. RESULTS In total, 293 patients with a mean ± SD age of 67 ± 7 years were included. Of these, 22% (n = 65) were frail, 59% (n = 172) were prefrail, and 19% (n = 56) were nonfrail. At baseline, the three frailty groups had similar PROs, except PCS (p = 0.003) and ODI (p = 0.02) were worse in the frail group. A greater proportion of frail patients experienced major AEs than nonfrail patients (p < 0.0001). However, despite the increased incidence of AEs, there was no association between frailty and postoperative PROs (scores on EQ-5D, PCS and MCS, ODI, and back-pain and leg-pain NRS) at 3 and 12 months (p ≥ 0.05). In general, PROs improved at 3 and 12 months (with most patients reaching the minimum clinically important difference for all PROs). CONCLUSIONS Although frailty predicted postoperative AEs, mFI did not predict PROs of patients older than 55 years with degenerative thoracolumbar spine after spine surgery.
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Affiliation(s)
| | - Alana M Flexman
- 2Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia, Vancouver, British Columbia; and
| | - John T Street
- 3Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Charles G Fisher
- 3Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Tamir Ailon
- 3Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Marcel F Dvorak
- 3Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Brian K Kwon
- 3Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Scott J Paquette
- 3Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Nicolas Dea
- 3Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Raphaële Charest-Morin
- 3Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver, British Columbia, Canada
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12
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Ayling OGS, Ailon T, Street JT, Dea N, McIntosh G, Abraham E, Jacobs WB, Soroceanu A, Johnson MG, Paquet J, Rasoulinejad P, Phan P, Yee A, Christie S, Nataraj A, Glennie RA, Hall H, Manson N, Rampersaud YR, Thomas K, Fisher CG. The Effect of Perioperative Adverse Events on Long-Term Patient-Reported Outcomes After Lumbar Spine Surgery. Neurosurgery 2021; 88:420-427. [PMID: 33009559 DOI: 10.1093/neuros/nyaa427] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Accepted: 06/28/2020] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Perioperative adverse events (AEs) lead to patient disappointment and greater costs. There is a paucity of data on how AEs affect long-term outcomes. OBJECTIVE To examine perioperative AEs and their impact on outcome after lumbar spine surgery. METHODS A total of 3556 consecutive patients undergoing surgery for lumbar degenerative disorders enrolled in the Canadian Spine Outcomes and Research Network were analyzed. AEs were defined using the validated Spine AdVerse Events Severity system. Outcomes at 3, 12, and 24 mo postoperatively included the Owestry Disability Index (ODI), 12-Item Short-Form Health Survey (SF-12) Physical (PCS) and Mental (MCS) Component Summary scales, visual analog scale (VAS) leg and back, EuroQol-5D (EQ5D), and satisfaction. RESULTS AEs occurred in 767 (21.6%) patients, and 85 (2.4%) patients suffered major AEs. Patients with major AEs had worse ODI scores and did not reach minimum clinically important differences at 2 yr (no AE: 25.7 ± 19.2, major: 36.4 ± 19.1, P < .001). Major AEs were associated with worse ODI scores on multivariable linear regression (P = .011). PCS scores were lower after major AEs (43.8 ± 9.5, vs 37.7 ± 20.3, P = .002). On VAS leg and back and EQ5D, the 2-yr outcomes were significantly different between the major and no AE groups (<0.01), but these differences were small (VAS leg: 3.4 ± 3.0 vs 4.0 ± 3.3; VAS back: 3.5 ± 2.7 vs 4.5 ± 2.6; EQ5D: 0.75 ± 0.2 vs 0.64 ± 0.2). SF12 MCS scores were not different. Rates of satisfaction were lower after major AEs (no AE: 84.6%, major: 72.3%, P < .05). CONCLUSION Major AEs after lumbar spine surgery lead to worse functional outcomes and lower satisfaction. This highlights the need to implement strategies aimed at reducing AEs.
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Affiliation(s)
- Oliver G S Ayling
- Department of Surgery, Vancouver General Hospital/University of British Columbia, Vancouver, Canada
| | - Tamir Ailon
- Department of Surgery, Vancouver General Hospital/University of British Columbia, Vancouver, Canada
| | - John T Street
- Department of Surgery, Vancouver General Hospital/University of British Columbia, Vancouver, Canada
| | - Nicolas Dea
- Department of Surgery, Vancouver General Hospital/University of British Columbia, Vancouver, Canada
| | | | - Edward Abraham
- Department of Surgery, Canada East Spine Centre, Saint John, Canada
| | - W Bradly Jacobs
- Department of Surgery, University of Calgary, Calgary, Canada
| | - Alex Soroceanu
- Department of Surgery, University of Calgary, Calgary, Canada
| | - Michael G Johnson
- Departments of Orthopedics and Neurosurgery, University of Manitoba, Winnipeg, Canada
| | - Jerome Paquet
- Department of Surgery, Laval University, Quebec City, Canada
| | | | - Phillipe Phan
- Department of Surgery, University of Ottawa, Ottawa, Canada
| | - Albert Yee
- Department of Surgery, University of Toronto, Toronto, Canada
| | - Sean Christie
- Department of Surgery, Dalhousie University, Halifax, Canada
| | - Andrew Nataraj
- Department of Surgery, University of Alberta, Edmonton, Canada
| | | | - Hamilton Hall
- Department of Surgery, University of Toronto, Toronto, Canada
| | - Neil Manson
- Department of Surgery, Canada East Spine Centre, Saint John, Canada
| | | | - Kenneth Thomas
- Department of Surgery, University of Calgary, Calgary, Canada
| | - Charles G Fisher
- Department of Surgery, Vancouver General Hospital/University of British Columbia, Vancouver, Canada
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Banaszek D, Inglis T, Ritchie L, Belanger L, Ailon T, Charest-Morin R, Dea N, Kwon BK, Paquette S, Fisher CG, Dvorak MF, Street JT. Effectiveness of silver alloy-coated silicone urinary catheters in patients with acute traumatic cervical spinal cord injury: Results of a quality improvement initiative. J Clin Neurosci 2020; 78:135-138. [PMID: 32536507 DOI: 10.1016/j.jocn.2020.05.036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Accepted: 05/04/2020] [Indexed: 10/24/2022]
Abstract
Patients with acute traumatic cervical spinal cord injury (ATCSCI) have an increased risk of catheter-associated urinary tract infection (CAUTI). The effectiveness of silver alloy-coated silicone urinary catheters (SACC) in preventing CAUTI in ATCSCI is unknown and was the objective of this study. We performed a quality improvement initiative in an attempt to reduce CAUTI in patients undergoing spine surgery at a single quaternary center. Prior to July 2015, all patients received a latex indwelling catheter (LIC). All patients with ATCSCI with limited hand function (AIS A,B, or C) received a SACC. Incidence of CAUTI, microbiology, duration of infection, antibiotic susceptibility, and catheter-associated adverse events were recorded prospectively. We studied 3081 consecutive patients over the three years, of whom 302 (9.8%) had ATCSCI; 63% of ATCSCI patients were ASIA Impairment Scale (AIS) A or B. The overall rate of CAUTI was 19% (585/3081), and was 38% (116/302) in patients with ATCSCI. Of 178 ATCSCI patients with LIC, 100 (56%) developed a CAUTI compared with 28 of 124 (23%) patients with SACC (p < 0.05). Poly-microbial and gram-positive infection was more common in LIC than in SACC (p < 0.05). Median duration of infection was 9 days in SACC group and 12 days in LIC group (p = 0.08). Resistance to trimethoprim (p < 0.001) and ciprofloxacin (p < 0.05) were more common in LIC group. There was no difference in catheter-associated adverse events or length of stay between the groups. This quality improvement initiative illustrates the effectiveness of antiseptic silver alloy-coated silicone urinary catheters in patients with ATCSCI. In our population, the use of SACC reduces the incidence and the complexity of CAUTI.
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Affiliation(s)
- Dan Banaszek
- Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, 818 West 10th Avenue, Vancouver, BC V5Z 1M9, Canada.
| | - Tom Inglis
- Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, 818 West 10th Avenue, Vancouver, BC V5Z 1M9, Canada
| | - Leanna Ritchie
- Vancouver Spine Program, University of British Columbia, 818 West 10th Avenue, Vancouver, BC V5Z 1M9, Canada.
| | - Lise Belanger
- Vancouver Spine Program, University of British Columbia, 818 West 10th Avenue, Vancouver, BC V5Z 1M9, Canada.
| | - Tamir Ailon
- Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, 818 West 10th Avenue, Vancouver, BC V5Z 1M9, Canada.
| | - Raphaële Charest-Morin
- Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, 818 West 10th Avenue, Vancouver, BC V5Z 1M9, Canada.
| | - Nicolas Dea
- Department of Orthopaedics, University of British Columbia, 818 West 10th Avenue, Vancouver, BC V5Z 1M9, Canada.
| | - Brian K Kwon
- Department of Orthopaedics, University of British Columbia, 818 West 10th Avenue, Vancouver, BC V5Z 1M9, Canada.
| | - Scott Paquette
- Department of Orthopaedics, University of British Columbia, 818 West 10th Avenue, Vancouver, BC V5Z 1M9, Canada.
| | - Charles G Fisher
- Division of Spine Surgery, Department of Orthopaedics, University of British Columbia, Vancouver Spine Surgery Institute, Blusson Spinal Cord Centre, 818 West 10th Avenue, Vancouver, BC V5Z 1M9, Canada.
| | - Marcel F Dvorak
- Department of Orthopaedics, University of British Columbia, 818 West 10th Avenue, Vancouver, BC V5Z 1M9, Canada.
| | - John T Street
- Combined Neurosurgical and Orthopaedic Spine Program, Department of Orthopaedic Surgery, University of British Columbia, Vancouver Spine Surgery Institute, Blusson Spinal Cord Centre, 818 West 10th Avenue, Vancouver, BC V5Z 1M9, Canada.
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Banaszek D, Inglis T, Marion TE, Charest-Morin R, Moskven E, Rivers CS, Kurban D, Flexman AM, Ailon T, Dea N, Kwon BK, Paquette S, Fisher CG, Dvorak MF, Street JT. Effect of Frailty on Outcome after Traumatic Spinal Cord Injury. J Neurotrauma 2020; 37:839-845. [DOI: 10.1089/neu.2019.6581] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- Dan Banaszek
- Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Tom Inglis
- Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Travis E. Marion
- Division of Orthopaedic Surgery, Northern Ontario School of Medicine, Thunder Bay, Ontario, Canada
| | - Raphaële Charest-Morin
- Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Eryck Moskven
- Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Dilnur Kurban
- Rick Hansen Institute, Vancouver, British Columbia, Canada
| | - Alana M. Flexman
- Department of Anesthesiology, Pharmacology, and Therapeutics, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Anesthesiology and Perioperative Care, Vancouver General Hospital, Vancouver, British Columbia, Canada
| | - Tamir Ailon
- Vancouver Spine Surgery Institute, Division of Neurosurgery, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Nicolas Dea
- Vancouver Spine Surgery Institute, Division of Neurosurgery, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Brian K. Kwon
- Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
- International Collaboration on Repair Discoveries (ICORD), Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Scott Paquette
- Vancouver Spine Surgery Institute, Division of Neurosurgery, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Charles G. Fisher
- Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Marcel F. Dvorak
- Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
- International Collaboration on Repair Discoveries (ICORD), Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - John T. Street
- Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
- International Collaboration on Repair Discoveries (ICORD), Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
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Charest-Morin R, Flexman AM, Srinivas S, Fisher CG, Street JT, Boyd MC, Ailon T, Dvorak MF, Kwon BK, Paquette SJ, Dea N. Perioperative adverse events following surgery for primary bone tumors of the spine and en bloc resection for metastases. J Neurosurg Spine 2019; 32:1-8. [PMID: 31561231 DOI: 10.3171/2019.6.spine19587] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 06/28/2019] [Indexed: 01/01/2023]
Abstract
OBJECTIVE Surgical treatment of primary bone tumors of the spine and en bloc resection for isolated metastases are complex and challenging. Operative care is fraught with complications, though the true incidence and predictors of adverse events (AEs), length of stay (LOS), and mortality in this population remain poorly understood. The primary objective of this study was to describe the incidence and predictors of perioperative AEs in these patients. Secondary objectives included the determination of the incidence and predictors of admission to the intensive care unit (ICU), unanticipated reoperation during the same admission, hospital LOS, and mortality. METHODS In this retrospective analysis of prospectively collected data, the authors included consecutive patients at a single quaternary care referral center (January 1, 2009, to September 30, 2018) who underwent either surgery for a primary bone tumor of the spine or an en bloc resection for an isolated spinal metastasis. Information on perioperative AEs, demographic data, primary tumor histology, neurological status, surgical variables, pathological margins, Enneking appropriateness, LOS, ICU stay, reoperation during the same admission period, and in-hospital mortality was collected prospectively in the institutional database. The modified frailty score was extracted retrospectively. RESULTS One hundred thirteen patients met the inclusion criteria: 98 with primary bone tumors and 15 with isolated metastases. The cohort was 59% male, and the mean age was 49 years (SD 19 years). Overall, 79% of the patients experienced at least 1 AE. The median number of AEs per patient was 2 (IQR 0-4 AEs), and the median LOS was 16 days (IQR 9-32 days). No in-hospital deaths occurred in the cohort. Thirty-two patients (28%) required an ICU stay and 19% underwent an unanticipated second surgery during their admission. A longer surgical duration was associated with a higher likelihood of AEs (OR 1.21/hour, 95% CI 1.06-1.37, p = 0.005), longer ICU stay (OR 1.35/hour, 95% CI 1 1.20-1.52, p < 0.001), and reoperation (OR 1.001/hour, 95% CI 1.0003-1.003, p = 0.012). Longer hospital LOS was independently predicted by older age, female sex, upper cervical and sacral location of the tumor, surgical duration, preoperative neurological deficit, presence of AEs, and higher modified frailty index score. CONCLUSIONS Surgeries for primary bone tumors and en bloc resection for metastatic tumors are associated with a high incidence of perioperative AEs. Surgical duration predicts complications, reoperation, LOS, and ICU stay.
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Affiliation(s)
- Raphaële Charest-Morin
- 1Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, and
| | - Alana M Flexman
- 2Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia, Vancouver, British Columbia, Canada; and
| | - Shreya Srinivas
- 3Department of Orthopaedics, Alder Hey Children's Hospital, NHS Foundation Trust, Liverpool, United Kingdom
| | - Charles G Fisher
- 1Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, and
| | - John T Street
- 1Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, and
| | - Michael C Boyd
- 1Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, and
| | - Tamir Ailon
- 1Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, and
| | - Marcel F Dvorak
- 1Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, and
| | - Brian K Kwon
- 1Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, and
| | - Scott J Paquette
- 1Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, and
| | - Nicolas Dea
- 1Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedic Surgery, and
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Tee JW, Rivers CS, Fallah N, Noonan VK, Kwon BK, Fisher CG, Street JT, Ailon T, Dea N, Paquette S, Dvorak MF. Decision tree analysis to better control treatment effects in spinal cord injury clinical research. J Neurosurg Spine 2019; 31:1-9. [PMID: 31200369 DOI: 10.3171/2019.3.spine18993] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 03/20/2019] [Indexed: 12/20/2022]
Abstract
OBJECTIVE The aim of this study was to use decision tree modeling to identify optimal stratification groups considering both the neurological impairment and spinal column injury and to investigate the change in motor score as an example of a practical application. Inherent heterogeneity in spinal cord injury (SCI) introduces variation in natural recovery, compromising the ability to identify true treatment effects in clinical research. Optimized stratification factors to create homogeneous groups of participants would improve accurate identification of true treatment effects. METHODS The analysis cohort consisted of patients with acute traumatic SCI registered in the Vancouver Rick Hansen Spinal Cord Injury Registry (RHSCIR) between 2004 and 2014. Severity of neurological injury (American Spinal Injury Association Impairment Scale [AIS grades A-D]), level of injury (cervical, thoracic), and total motor score (TMS) were assessed using the International Standards for Neurological Classification of Spinal Cord Injury examination; morphological injury to the spinal column assessed using the AOSpine classification (AOSC types A-C, C most severe) and age were also included. Decision trees were used to determine the most homogeneous groupings of participants based on TMS at admission and discharge from in-hospital care. RESULTS The analysis cohort included 806 participants; 79.3% were male, and the mean age was 46.7 ± 19.9 years. Distribution of severity of neurological injury at admission was AIS grade A in 40.0% of patients, grade B in 11.3%, grade C in 18.9%, and grade D in 29.9%. The level of injury was cervical in 68.7% of patients and thoracolumbar in 31.3%. An AOSC type A injury was found in 33.1% of patients, type B in 25.6%, and type C in 37.8%. Decision tree analysis identified 6 optimal stratification groups for assessing TMS: 1) AOSC type A or B, cervical injury, and age ≤ 32 years; 2) AOSC type A or B, cervical injury, and age > 32-53 years; 3) AOSC type A or B, cervical injury, and age > 53 years; 4) AOSC type A or B and thoracic injury; 5) AOSC type C and cervical injury; and 6) AOSC type C and thoracic injury. CONCLUSIONS Appropriate stratification factors are fundamental to accurately identify treatment effects. Inclusion of AOSC type improves stratification, and use of the 6 stratification groups could minimize confounding effects of variable neurological recovery so that effective treatments can be identified.
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Affiliation(s)
- Jin W Tee
- 1The Alfred Hospital, Department of Neurosurgery, National Trauma Research Institute (NTRI), Melbourne, Victoria, Australia
| | | | - Nader Fallah
- 2Rick Hansen Institute, Vancouver
- 3University of British Columbia, Vancouver
| | - Vanessa K Noonan
- 2Rick Hansen Institute, Vancouver
- 3University of British Columbia, Vancouver
| | - Brian K Kwon
- 4International Collaboration on Repair Discoveries (ICORD), University of British Columbia, Vancouver; and
- 5Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Charles G Fisher
- 4International Collaboration on Repair Discoveries (ICORD), University of British Columbia, Vancouver; and
| | - John T Street
- 4International Collaboration on Repair Discoveries (ICORD), University of British Columbia, Vancouver; and
- 5Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Tamir Ailon
- 4International Collaboration on Repair Discoveries (ICORD), University of British Columbia, Vancouver; and
| | - Nicolas Dea
- 5Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Scott Paquette
- 4International Collaboration on Repair Discoveries (ICORD), University of British Columbia, Vancouver; and
| | - Marcel F Dvorak
- 4International Collaboration on Repair Discoveries (ICORD), University of British Columbia, Vancouver; and
- 5Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
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17
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White BA, Dea N, Street JT, Cheng CL, Rivers CS, Attabib N, Kwon BK, Fisher CG, Dvorak MF. The Economic Burden of Urinary Tract Infection and Pressure Ulceration in Acute Traumatic Spinal Cord Injury Admissions: Evidence for Comparative Economics and Decision Analytics from a Matched Case-Control Study. J Neurotrauma 2017; 34:2892-2900. [DOI: 10.1089/neu.2016.4934] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Affiliation(s)
| | - Nicolas Dea
- Service de Neurochirurgie, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - John T. Street
- Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
| | | | | | - Najmedden Attabib
- Dalhousie University, Halifax, Nova Scotia; Horizon Health Network, Division of Neurosurgery, Saint John Regional Hospital, Saint John, New Brunswick, Canada
| | - Brian K. Kwon
- Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Charles G. Fisher
- Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Marcel F. Dvorak
- Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
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Marion TE, Rivers CS, Kurban D, Cheng CL, Fallah N, Batke J, Dvorak MF, Fisher CG, Kwon BK, Noonan VK, Street JT. Previously Identified Common Post-Injury Adverse Events in Traumatic Spinal Cord Injury-Validation of Existing Literature and Relation to Selected Potentially Modifiable Comorbidities: A Prospective Canadian Cohort Study. J Neurotrauma 2017; 34:2883-2891. [PMID: 28562167 PMCID: PMC5653096 DOI: 10.1089/neu.2016.4933] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Adverse events (AEs) are common during care in patients with traumatic spinal cord injury (tSCI). Increased risk of AEs is linked to patient factors including pre-existing comorbidities. Our aim was to examine the relationships between patient factors and common post-injury AEs, and identify potentially modifiable comorbidities. Adults with tSCI admitted to a Level I acute specialized spine center between 2006 and 2014 who were enrolled in the Rick Hansen SCI Registry (RHSCIR) and had AE data collected using the Spine Adverse Events Severity system were included. Patient demographic, neurological injury, and comorbidities data were obtained from RHSCIR. Potentially modifiable comorbidities were grouped into health-related conditions, substance use/withdrawal, and psychiatric conditions. Negative binomial regression and multiple logistic regression were used to model the impact of patient factors on the number of AEs experienced and the occurrence of the five previously identified common AEs, respectively. Of the 444 patients included in the study, 24.8% reported a health-related condition, 15.3% had a substance use/withdrawal condition, 8% reported having a psychiatric condition; and 79.3% experienced one or more AEs. Older age (p = 0.004) and more severe injuries (p < 0.001) were nonmodifiable independent variables significantly associated with increased AEs. The AEs experienced by patients were urinary tract infections (42.8%), pneumonia (39.2%), neuropathic pain (31.5%), delirium (18.2%), and pressure ulcers (11.0%). Risk of delirium increased in those with substance use/withdrawal; and pneumonia risk increased with psychiatric comorbidities. Opportunity exists to develop clinical algorithms that include these types of risk factors to reduce the incidence and impact of AEs.
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Affiliation(s)
- Travis E Marion
- 1 Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia , Vancouver, British Columbia, Canada
| | - Carly S Rivers
- 2 Rick Hansen Institute , Vancouver, British Columbia, Canada
| | - Dilnur Kurban
- 2 Rick Hansen Institute , Vancouver, British Columbia, Canada
| | | | - Nader Fallah
- 2 Rick Hansen Institute , Vancouver, British Columbia, Canada
| | - Juliet Batke
- 1 Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia , Vancouver, British Columbia, Canada
| | - Marcel F Dvorak
- 1 Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia , Vancouver, British Columbia, Canada
| | - Charles G Fisher
- 1 Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia , Vancouver, British Columbia, Canada
| | - Brian K Kwon
- 1 Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia , Vancouver, British Columbia, Canada
| | | | - John T Street
- 1 Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia , Vancouver, British Columbia, Canada
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Glennie RA, Batke J, Fallah N, Cheng CL, Rivers CS, Noonan VK, Dvorak MF, Fisher CG, Kwon BK, Street JT. Rural and Urban Living in Persons with Spinal Cord Injury and Comparing Environmental Barriers, Their Health, and Quality-of-Life Outcomes. J Neurotrauma 2017; 34:2877-2882. [PMID: 28462633 PMCID: PMC5653139 DOI: 10.1089/neu.2016.4931] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
There is worldwide geographic variation in the epidemiology of traumatic spinal cord injury (tSCI). The aim of this study was to determine whether environmental barriers, health status, and quality-of-life outcomes differ between patients with tSCI living in rural or urban settings, and whether patients move from rural to urban settings after tSCI. A cohort review of the Rick Hansen SCI Registry (RHSCIR) was undertaken from 2004 to 2012 for one province in Canada. Rural/urban setting was determined using postal codes. Outcomes data at 1 year in the community included the Short Form-36 Version 2 (SF36v2™), Life Satisfaction Questionnaire, Craig Hospital Inventory of Environmental Factors-Short Form (CHIEF-SF), Functional Independent Measure® Instrument, and SCI Health Questionnaire. Statistical methodologies used were t test, Mann-Whitney U test, and Fisher's exact or χ2 test. In the analysis, 338 RHSCIR participants were included; 65 lived in a rural setting and 273 in an urban setting. Of the original patients residing in a rural area at discharge,10 moved to an urban area by 1 year. Those who moved from a rural to urban area reported a lower SF-36v2™ Mental Component Score (MCS; p = 0.04) and a higher incidence of depression at 1 year (p = 0.04). Urban patients also reported a higher incidence of depression (p = 0.02) and a lower CHIEF-SF total score (p = 0.01) indicating fewer environmental barriers. No significant differences were found in other outcomes. Results suggest that although the patient outcomes are similar, some patients move from rural to urban settings after tSCI. Future efforts should target screening mental health problems early, especially in urban settings.
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Affiliation(s)
- R Andrew Glennie
- 1 Department of Surgery, Dalhousie University , Halifax, Nova Scotia, Canada
| | - Juliet Batke
- 2 Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia , Vancouver, British Columbia, Canada
| | - Nader Fallah
- 3 Rick Hansen Institute , Vancouver, British Columbia, Canada
| | | | - Carly S Rivers
- 3 Rick Hansen Institute , Vancouver, British Columbia, Canada
| | | | - Marcel F Dvorak
- 2 Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia , Vancouver, British Columbia, Canada
| | - Charles G Fisher
- 2 Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia , Vancouver, British Columbia, Canada
| | - Brian K Kwon
- 2 Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia , Vancouver, British Columbia, Canada
| | - John T Street
- 2 Vancouver Spine Surgery Institute, Department of Orthopaedics, University of British Columbia , Vancouver, British Columbia, Canada
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Street JT, Andrew Glennie R, Dea N, DiPaola C, Wang Z, Boyd M, Paquette SJ, Kwon BK, Dvorak MF, Fisher CG. A comparison of the Wiltse versus midline approaches in degenerative conditions of the lumbar spine. J Neurosurg Spine 2016; 25:332-8. [PMID: 27104286 DOI: 10.3171/2016.2.spine151018] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The objective of this study was to determine if there is a significant difference in surgical site infection (SSI) when comparing the Wiltse and midline approaches for posterior instrumented interbody fusions of the lumbar spine and, secondarily, to evaluate if the reoperation rates and specific causes for reoperation were similar for both approaches. METHODS A total of 358 patients who underwent 1- or 2-level posterior instrumented interbody fusions for degenerative lumbar spinal pathology through either a midline or Wiltse approach were prospectively followed between March 2005 and January 2011 at a single tertiary care facility. A retrospective analysis was performed primarily to evaluate the incidence of SSI and the incidence and causes for reoperation. Secondary outcome measures included intraoperative complications, blood loss, and length of stay. A matched analysis was performed using the Fisher's exact test and a logistic regression model. The matched analysis controlled for age, sex, comorbidities, number of index levels addressed surgically, number of levels fused, and the use of bone grafting. RESULTS All patients returned for follow-up at 1 year, and adverse events were followed for 2 years. The rate of SSI was greater in the midline group (8 of 103 patients; 7.8%) versus the Wiltse group (1 of 103 patients; 1.0%) (p = 0.018). Fewer additional surgical procedures were performed in the Wiltse group (p = 0.025; OR 0.47; 95% CI 0.23-0.95). Proximal adjacent segment failure requiring reoperation occurred more frequently in the midline group (15 of 103 patients; 14.6%) versus the Wiltse group (6 of 103 patients; 5.8%) (p = 0.048). Blood loss was significantly lower in the Wiltse group (436 ml) versus the midline group (703 ml); however, there was no significant difference between the 2 groups in intraoperative complications or length of stay. CONCLUSIONS The patients who underwent the Wiltse approach had a decreased risk of wound breakdown and infection, less blood loss, and fewer reoperations than the midline patients. The risk of adjacent segment failure in short posterior constructs is lower with a Wiltse approach.
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Affiliation(s)
- John T Street
- Vancouver Spine Surgery Institute and Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia
| | - R Andrew Glennie
- Division of Orthopedics, Dalhousie University, Halifax, Nova Scotia
| | - Nicolas Dea
- Vancouver Spine Surgery Institute and Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia
| | - Christian DiPaola
- Department of Orthopedics, University of Massachusetts Medical Center, Worcester, Massachusetts
| | - Zhi Wang
- Department of Surgery, University of Montreal, Montreal, Canada; and
| | - Michael Boyd
- Vancouver Spine Surgery Institute and Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia
| | - Scott J Paquette
- Vancouver Spine Surgery Institute and Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia
| | - Brian K Kwon
- Vancouver Spine Surgery Institute and Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia
| | - Marcel F Dvorak
- Vancouver Spine Surgery Institute and Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia;,Department of Surgery, University of Montreal, Montreal, Canada; and
| | - Charles G Fisher
- Vancouver Spine Surgery Institute and Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia
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21
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Dea N, Fisher CG, Batke J, Strelzow J, Mendelsohn D, Paquette SJ, Kwon BK, Boyd MD, Dvorak MFS, Street JT. Economic evaluation comparing intraoperative cone beam CT-based navigation and conventional fluoroscopy for the placement of spinal pedicle screws: a patient-level data cost-effectiveness analysis. Spine J 2016; 16:23-31. [PMID: 26456854 DOI: 10.1016/j.spinee.2015.09.062] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Revised: 08/28/2015] [Accepted: 09/29/2015] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Pedicle screws are routinely used in contemporary spinal surgery. Screw misplacement may be asymptomatic but is also correlated with potential adverse events. Computer-assisted surgery (CAS) has been associated with improved screw placement accuracy rates. However, this technology has substantial acquisition and maintenance costs. Despite its increasing usage, no rigorous full economic evaluation comparing this technology to current standard of care has been reported. PURPOSE Medical costs are exploding in an unsustainable way. Health economic theory requires that medical equipment costs be compared with expected benefits. To answer this question for computer-assisted spinal surgery, we present an economic evaluation looking specifically at symptomatic misplaced screws leading to reoperation secondary to neurologic deficits or biomechanical concerns. STUDY DESIGN/SETTING The study design was an observational case-control study from prospectively collected data of consecutive patients treated with the aid of CAS (treatment group) compared with a matched historical cohort of patients treated with conventional fluoroscopy (control group). PATIENT SAMPLE The patient sample consisted of consecutive patients treated surgically at a quaternary academic center. OUTCOME MEASURES The primary effectiveness measure studied was the number of reoperations for misplaced screws within 1 year of the index surgery. Secondary outcome measures included were total adverse event rate and postoperative computed tomography usage for pedicle screw examination. METHODS A patient-level data cost-effectiveness analysis from the hospital perspective was conducted to determine the value of a navigation system coupled with intraoperative 3-D imaging (O-arm Imaging and the StealthStation S7 Navigation Systems, Medtronic, Louisville, CO, USA) in adult spinal surgery. The capital costs for both alternatives were reported as equivalent annual costs based on the annuitization of capital expenditures method using a 3% discount rate and a 7-year amortization period. Annual maintenance costs were also added. Finally, reoperation costs using a micro-costing approach were calculated for both groups. An incremental cost-effectiveness ratio was calculated and reported as cost per reoperation avoided. Based on reoperation costs in Canada and in the United States, a minimal caseload was calculated for the more expensive alternative to be cost saving. Sensitivity analyses were also conducted. RESULTS A total of 5,132 pedicle screws were inserted in 502 patients during the study period: 2,682 screws in 253 patients in the treatment group and 2,450 screws in 249 patients in the control group. Overall accuracy rates were 95.2% for the treatment group and 86.9% for the control group. Within 1 year post treatment, two patients (0.8%) required a revision surgery in the treatment group compared with 15 patients (6%) in the control group. An incremental cost-effectiveness ratio of $15,961 per reoperation avoided was calculated for the CAS group. Based on a reoperation cost of $12,618, this new technology becomes cost saving for centers performing more than 254 instrumented spinal procedures per year. CONCLUSIONS Computer-assisted spinal surgery has the potential to reduce reoperation rates and thus to have serious cost-effectiveness and policy implications. High acquisition and maintenance costs of this technology can be offset by equally high reoperation costs. Our cost-effectiveness analysis showed that for high-volume centers with a similar case complexity to the studied population, this technology is economically justified.
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Affiliation(s)
- Nicolas Dea
- Department of Surgery, Division of Neurosurgery, Université de Sherbrooke, 3001, 12th Ave Nord, Sherbrooke, Quebec, Canada J1H 5N4.
| | - Charles G Fisher
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
| | - Juliet Batke
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
| | - Jason Strelzow
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
| | - Daniel Mendelsohn
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
| | - Scott J Paquette
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
| | - Brian K Kwon
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
| | - Michael D Boyd
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
| | - Marcel F S Dvorak
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
| | - John T Street
- Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 6th Floor, 818 West 10th Ave, Vancouver, British-Columbia, Canada V5Z 1M9
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Holtz KA, Charest R, Fisher C, Street JT. Poster 232 Severe Sciatic Nerve Palsy from a Gluteal Hematoma after Scoliosis Surgery: A Case Report. PM R 2015. [DOI: 10.1016/j.pmrj.2015.06.270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Andrew Glennie R, Dea N, Kwon BK, Street JT. Early clinical results with cortically based pedicle screw trajectory for fusion of the degenerative lumbar spine. J Clin Neurosci 2015; 22:972-5. [DOI: 10.1016/j.jocn.2015.01.010] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Accepted: 01/24/2015] [Indexed: 01/16/2023]
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Street JT, Noonan VK, Cheung A, Fisher CG, Dvorak MF. Incidence of acute care adverse events and long-term health-related quality of life in patients with TSCI. Spine J 2015; 15:923-32. [PMID: 23981816 DOI: 10.1016/j.spinee.2013.06.051] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2012] [Revised: 04/04/2013] [Accepted: 06/14/2013] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Adverse events (AEs) with significant resultant morbidity are common during the acute hospital care of patients with traumatic spinal cord injury (TSCI). The Rick Hansen SCI Registry (RHSCIR) collects Canada-wide data on patients with TSCI, such as sociodemographic, injury, diagnosis, intervention, and health outcome details. These data contribute to an evidence base for informing best practice and improving SCI care. As the RHSCIR captures data on patients from prehospital to community phases of care, it is an invaluable resource for providing information on health outcomes resulting from TSCI, including outcomes related to AEs. PURPOSE To determine the incidence and types of AEs occurring in patients with TSCI during acute care and the impact on length of stay (LOS) and health-related quality of life (HRQOL). STUDY DESIGN/SETTING Prospective cohort study at an academic quaternary referral center. PATIENT SAMPLE Patients with TSCI discharged from our institution between 2008 and 2010 were identified using the RHSCIR. The RHSCIR includes patients admitted to one of the participating centers across Canada, who have been clinically diagnosed with an acute TSCI or classified as AIS A, B, C, D, or cauda equina. OUTCOME MEASURES Acute-phase LOS and HRQOL were assessed for impact resulting from the number and type of AEs experienced. Health-related quality of life was determined using the short-form 36 (SF-36) physical and mental component summary scores and functional independence measure. METHODS Data related to patients' injury, diagnoses, hospital admission, and SF-36 scores were obtained from the local RHSCIR. Data on intra-, pre-, and postoperative AEs were collected prospectively using the Spine Adverse Events Severity System data collection system, documenting all AEs experienced by each patient. Multivariate analyses were performed to determine whether patient and injury characteristics were associated with the number and type of AEs experienced and whether these were associated with LOS and HRQOL determined on follow-up. RESULTS One hundred seventy-one patients with TSCI were included, 81.3% were men and mean age at injury was 47.2±20.3 years. Adverse events occurred in 77.2% of patients, 14.6% experienced an intraoperative and 73.7% experienced a pre/postoperative event. The most frequent pre/postoperative AEs were urinary tract infections (UTIs) (32.2%), pneumonias (32.8%), neuropathic pain (15.2%), decubitus ulcers (14.6%), and delirium (18.7%). Length of stay was significantly affected by decubitus ulcers, delirium, pneumonias, and UTIs (p<.01), increasing 1.7 (UTIs) to 2.2 (decubitus ulcers) times compared with patients without the specific AEs. Health-related quality of life was not affected by acute care AEs but rather those identified at 1-year follow-up. CONCLUSIONS This prospective study found that more than 77% of patients with TSCI sustain an AE during acute hospital care, significantly higher than previously reported. We demonstrate the utility of a dedicated AE collection system and the effect of these events on health status.
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Affiliation(s)
- John T Street
- Division of Spine, Department of Orthopedics, University of British Columbia, #6100, 818 W. 10th Ave., Vancouver, British Columbia, Canada V5Z 1M9.
| | - Vanessa K Noonan
- Division of Spine, Department of Orthopedics, University of British Columbia, #6100, 818 W. 10th Ave., Vancouver, British Columbia, Canada V5Z 1M9; Rick Hansen Institute, Vancouver, Blusson Spinal Cord Center, 818 W. 10th Ave., British Columbia, Canada V5Z 1M9
| | - Antoinette Cheung
- Rick Hansen Institute, Vancouver, Blusson Spinal Cord Center, 818 W. 10th Ave., British Columbia, Canada V5Z 1M9
| | - Charles G Fisher
- Division of Spine, Department of Orthopedics, University of British Columbia, #6100, 818 W. 10th Ave., Vancouver, British Columbia, Canada V5Z 1M9
| | - Marcel F Dvorak
- Division of Spine, Department of Orthopedics, University of British Columbia, #6100, 818 W. 10th Ave., Vancouver, British Columbia, Canada V5Z 1M9; Rick Hansen Institute, Vancouver, Blusson Spinal Cord Center, 818 W. 10th Ave., British Columbia, Canada V5Z 1M9
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Glennie RA, Ailon T, Yang K, Batke J, Fisher CG, Dvorak MF, Vaccaro AR, Fehlings MG, Arnold P, Harrop JS, Street JT. Incidence, impact, and risk factors of adverse events in thoracic and lumbar spine fractures: an ambispective cohort analysis of 390 patients. Spine J 2015; 15:629-37. [PMID: 25450658 DOI: 10.1016/j.spinee.2014.11.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Revised: 10/15/2014] [Accepted: 11/21/2014] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Adverse events (AEs) in thoracic and lumbar spine fractures are common, but little is known about the type of AEs that are specific to this population. Furthermore, very little is known about the incidence and clinical impact of these AEs on patients in the presence of traumatic spinal cord injury and whether they are treated operatively or nonoperatively. PURPOSE The purpose of this study was to determine primarily the incidence of AEs in patients with thoracic or lumbar spine fractures treated both operatively and nonoperatively and their impact on length of stay (LOS) and secondarily the difference in the incidence of AEs in both neurologically intact and compromised patients. STUDY DESIGN/SETTING This is an ambispective cohort study at a quaternary referral center. PATIENT SAMPLE Patients admitted at our institution with thoracic or lumbar fractures from January 2009 to December 2013 were identified. Patients with full Spine Adverse Events Severity System (SAVES) data were included. OUTCOME MEASURES Number and type of AEs collected from SAVES were assessed. Impact of AE on acute LOS was also determined. METHODS Data on intraoperative, preoperative, and postoperative AEs were prospectively collected using the SAVES data collection. Logistic regression was used to model the likelihood of experiencing at least one AE based on the patient characteristics. The impact of the total number of AEs experienced by a patient and that of each of the most common AEs on LOS was determined using Poisson regression. RESULTS Three hundred and ninety patients were included in the final analysis. Two hundred and seventy-six patients (70.8%) were treated operatively. One hundred and forty patients (36%) experienced neurologic deficit as a result of their initial injury. Adverse events occurred 56% of the time in the operatively treated patients and only 13% of the time in the nonoperative group. The presence of neurologic deficit increased the risk of AEs especially in high thoracic (T1-T6) trauma increasing the odds of having an AE by 12.1 (p<.0001). The most common AEs were urinary tract infections (19.7%), neuropathic pain (12.3%), pneumonias (11.8%), delirium (10.5%), and ileus (6.2%). Length of hospital stay increased significantly with pneumonia (p<.0001) and delirium (p=.0001). CONCLUSIONS The presence of neurologic injury and the need for operative fixation of thoracic or lumbar injuries lead to a greater risk of AEs. Only pneumonia and delirium consistently increase LOS.
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Affiliation(s)
- R Andrew Glennie
- Combined Neurosurgical and Orthopedic Spine Program, Blusson Spinal Cord Center, University of British Columbia, 818 West 10th Ave., Vancouver, British Columbia, Canada V5Z1M9
| | - Tamir Ailon
- Combined Neurosurgical and Orthopedic Spine Program, Blusson Spinal Cord Center, University of British Columbia, 818 West 10th Ave., Vancouver, British Columbia, Canada V5Z1M9
| | - Kyun Yang
- Combined Neurosurgical and Orthopedic Spine Program, Blusson Spinal Cord Center, University of British Columbia, 818 West 10th Ave., Vancouver, British Columbia, Canada V5Z1M9
| | - Juliet Batke
- Combined Neurosurgical and Orthopedic Spine Program, Blusson Spinal Cord Center, University of British Columbia, 818 West 10th Ave., Vancouver, British Columbia, Canada V5Z1M9
| | - Charles G Fisher
- Combined Neurosurgical and Orthopedic Spine Program, Blusson Spinal Cord Center, University of British Columbia, 818 West 10th Ave., Vancouver, British Columbia, Canada V5Z1M9
| | - Marcel F Dvorak
- Department of Orthopedic Surgery, Thomas Jefferson University, 925 Chestnut Street, Philadelphia, PA 19107, USA
| | - Alexander R Vaccaro
- Department of Orthopedic Surgery, Thomas Jefferson University, 925 Chestnut Street, Philadelphia, PA 19107, USA; Department of Neurological Surgery, Thomas Jefferson University, 925 Chestnut Street, Philadelphia, PA 19107, USA
| | - Michael G Fehlings
- Department of Surgery and Spinal Program, University of Toronto and University Health Network, 585 University Ave. Toronto, Ontario M5G2C4, Canada
| | - Paul Arnold
- Department of Neurosurgery, University of Kansas Medical Center, 3901 Rainbow Blvd., Kansas City, KS 66160, USA
| | - James S Harrop
- Department of Orthopedic Surgery, Thomas Jefferson University, 925 Chestnut Street, Philadelphia, PA 19107, USA; Department of Neurological Surgery, Thomas Jefferson University, 925 Chestnut Street, Philadelphia, PA 19107, USA
| | - John T Street
- Combined Neurosurgical and Orthopedic Spine Program, Blusson Spinal Cord Center, University of British Columbia, 818 West 10th Ave., Vancouver, British Columbia, Canada V5Z1M9.
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Andrew Glennie R, Dea N, Street JT. Dressings and drains in posterior spine surgery and their effect on wound complications. J Clin Neurosci 2015; 22:1081-7. [PMID: 25818940 DOI: 10.1016/j.jocn.2015.01.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Accepted: 01/24/2015] [Indexed: 10/23/2022]
Abstract
The purpose of this study was to systematically search, critically appraise and summarize published randomized control trials (RCT) and non-RCT examining the effect of drains and dressings on wound healing rates and complications in posterior spine surgery. The use of post-operative drains and the type of post-operative dressing is at the discretion of the treating surgeon with no available clinical guidelines. Drains will theoretically decrease incidence of post-operative hematoma and therefore, potentially decrease the risk of neurologic compromise when the neural elements have been exposed. Occlusive dressings have more recently been advocated, potentially maintaining a sterile barrier for longer time periods post-operatively. A systematic review of databases from 1969-2013 was undertaken. All papers examining drains in spine surgery and dressings in primary healing of surgical wounds were included. Revman (version 5.2; The Nordic Cochrane Centre, The Cochrane Collaboration, Oxford, UK) was used to test for overall treatment effect, clinical heterogeneity and risk of bias. Of the papers identified, 1348 examined post-operative drains in spine surgery and 979 wound dressings for primary wound healing of all surgical wounds. Seven studies were included for analysis for post-operative drains and 10 studies were analyzed for primary wound healing. The use of a post-operative drain did not influence healing rates and had no effect secondarily on infection (odds ratio [OR] 1.33; 95% confidence interval [CI] 0.76-2.30). We were not able to establish whether surgical drains prevent hematomas causing neurologic compromise. There was a slight advantage to using occlusive dressings versus non-occlusive dressings in wound healing (OR 2.09; 95% CI 1.44-3.02). Incisional vacuum dressings as both an occlusive barrier and superficial drainage system have shown promise for wounds at risk of dehiscence. There is a relatively high risk of bias in the methodology of many of the studies reviewed. We recommend favoring of occlusive dressings based on heterogeneous and potentially biased evidence. Drain use does not affect wound healing based on similar evidence. Incisional vacuum dressings have shown promise in managing potentially vulnerable wounds.
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Affiliation(s)
- R Andrew Glennie
- Dalhousie University, 1798 Summer Street, Halifax, Nova Scotia B3H 3A7, Canada; Combined Neurosurgical and Orthopedic Spine Program, University of British Columbia, Vancouver, BC, Canada.
| | - Nicolas Dea
- Combined Neurosurgical and Orthopedic Spine Program, University of British Columbia, Vancouver, BC, Canada
| | - John T Street
- Combined Neurosurgical and Orthopedic Spine Program, University of British Columbia, Vancouver, BC, Canada
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Kelly AM, Batke JNN, Dea N, Hartig DPP, Fisher CG, Street JT. Prospective analysis of adverse events in surgical treatment of degenerative spondylolisthesis. Spine J 2014; 14:2905-10. [PMID: 24769400 DOI: 10.1016/j.spinee.2014.04.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 04/01/2014] [Accepted: 04/16/2014] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Surgical adverse event (AE) monitoring is imprecise, of uncertain validity, and tends toward underreporting. Reports focus on specific procedures rather than outcomes in the context of presenting diagnosis. Specific intraoperative (intraop) or postoperative (postop) AEs that may be independently associated with degenerative spondylolisthesis (DS) have never been reported. PURPOSE The primary purpose was to assess the AE profile of surgically treated patients with L4-L5 DS. The secondary goal was to identify potential risk factors that correlate with those AEs. STUDY DESIGN/SETTING Prospective cohort and academic quaternary spine center. PATIENT SAMPLE Ninety-two patients with L4-L5 DS were treated surgically, discharged from Vancouver General Hospital between January 1, 2009 and December 31, 2010. OUTCOME MEASURES Incidence rates and odds ratios. METHODS Prospective AE data were analyzed using univariate analyses, forward selection regression models, and Spearman correlation coefficients. Results were compared with outcomes reported in the Spine Patient Outcomes Research Trial. RESULTS No AEs were seen in 57.6% of patients, one AE in 17.4%, and two or more AEs in 17.4%. Dural tears (6.5%) and intraop bone-implant interface failure requiring revision (3.3%) were the most common intraop AEs. Postoperatively, the most frequent AEs were urinary tract infection (10.9%), delirium (5.4%), neuropathic pain (4.4%), deep wound infection (3.3%), and superficial wound infection (3.3%). The odds of an intraop AE increased by 9% (95% confidence interval [CI] 1-18) per year of age at admission. Adjusted Charlson comorbidity index (CCI) did not correlate with number of AEs experienced. The odds of postop delirium correlated with CCI (odds ratio [OR] 3.39, 95% CI 1.12-10.24) and dural tear (OR 35.84, 95% CI 1.72-747.45). Length of stay was statistically significant and was influenced by two or more AEs, CCI, postop loss of correction, cerebrospinal fluid leak, deep wound infection, noninfected wound drainage, and gender. CONCLUSIONS Risk of intraop AEs, but not postop AEs, increased with increasing age. Having multiple comorbidities does not predispose to more AEs. Infections predominate among the postop AEs. Patients at increased risk of delirium or of having an increased length of hospital stay may more easily be predicted. Studies specifically designed to prospectively assess AEs have the potential to more accurately identify postop AE rates.
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Affiliation(s)
- Adrienne M Kelly
- Department of Orthopedics, Otsego Memorial Hospital, 2147 Professional Dr, Gaylord, MI 49735, USA.
| | - Juliet N N Batke
- Division of Spine, Department of Orthopaedics, University of British Columbia, 818 West 10th Ave, Vancouver, British Columbia V5Z 1M9, Canada
| | - Nicolas Dea
- Division of Spine, Department of Orthopaedics, University of British Columbia, 818 West 10th Ave, Vancouver, British Columbia V5Z 1M9, Canada; Combined Neurosurgical and Orthopaedic Spine Program, Vancouver General Hospital, 818 West 10th Ave, Vancouver, British Columbia V5Z 1M9, Canada
| | - Dennis P P Hartig
- Department of Orthopaedics, Royal Brisbane Hospital, Butterfield St, Herston Queensland 4006, Australia
| | - Charles G Fisher
- Division of Spine, Department of Orthopaedics, University of British Columbia, 818 West 10th Ave, Vancouver, British Columbia V5Z 1M9, Canada; Combined Neurosurgical and Orthopaedic Spine Program, Vancouver General Hospital, 818 West 10th Ave, Vancouver, British Columbia V5Z 1M9, Canada
| | - John T Street
- Division of Spine, Department of Orthopaedics, University of British Columbia, 818 West 10th Ave, Vancouver, British Columbia V5Z 1M9, Canada; Combined Neurosurgical and Orthopaedic Spine Program, Vancouver General Hospital, 818 West 10th Ave, Vancouver, British Columbia V5Z 1M9, Canada
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Gillis CC, Street JT, Boyd MC, Fisher CG. Pelvic reconstruction after subtotal sacrectomy for sacral chondrosarcoma using cadaveric and vascularized fibula autograft: Technical note. J Neurosurg Spine 2014; 21:623-7. [PMID: 25084027 DOI: 10.3171/2014.6.spine13657] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A novel method of spinopelvic ring reconstruction after partial sacrectomy for a chondrosarcoma is described. Chondrosarcoma is one of the most common primary malignant bone tumors, and en bloc resection is the mainstay of treatment. Involvement of the pelvis as well as the sacrum and lumbar spine can result in a technically difficult challenge for en bloc resection and for achievement of appropriate load-bearing reconstruction. After en bloc resection in their patient, the authors achieved reconstruction with a rod and screw construct including vascularized fibula graft as the main strut from the lumbar spine to the pelvis. Additionally, a cadaveric allograft strut was used as an adjunct for the pelvic ring. This is similar to a modified Galveston technique with vascularized fibula in place of the Galveston rods. The vascularized fibula provided appropriate biomechanical support, allowing the patient to return to independent ambulation. There was no tumor recurrence; neurological status remained stable; and the allograft construct integrated well and even increased in size on CT scans and radiographs in the course of a follow-up longer than 7 years.
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Schouten R, Keynan O, Lee RS, Street JT, Boyd MC, Paquette SJ, Kwon BK, Dvorak MF, Fisher CG. Health-related quality-of-life outcomes after thoracic (T1-T10) fractures. Spine J 2014; 14:1635-42. [PMID: 24373680 DOI: 10.1016/j.spinee.2013.09.049] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2012] [Revised: 09/13/2013] [Accepted: 09/27/2013] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT The thoracic spine exhibits a unique response to trauma as the result of recognized anatomical and biomechanical differences. Despite this response, clinical studies often group thoracic fractures (T1-T10) with more caudal thoracolumbar injuries. Subsequently, there is a paucity of literature on the functional outcomes of this distinct group of injuries. PURPOSE To describe and identify predictors of health-related quality-of-life outcomes and re-employment status in patients with thoracic fractures who present to a spine injury tertiary referral center. STUDY DESIGN An ambispective cohort study with cross-sectional outcome assessment. PATIENT SAMPLE A prospectively collected fully relational spine database was searched to identify all adult (>16 years) patients treated with traumatic thoracic (T1-T10) fractures with and without neurologic deficits, treated between 1995 and 2008. OUTCOME MEASURES The Short-Form-36, Oswestry Disability Index, and Prolo Economic Scale outcome instruments were completed at a minimum follow-up of 12 months. Preoperative and minimum 1-year postinjury X-rays were evaluated. METHOD Univariate and multivariate regression analysis was used to identify predictors of outcomes from a range of demographic, injury, treatment, and radiographic variables. RESULTS One hundred twenty-six patients, age 36±15 years (mean±SD), with 135 fractures were assessed at a mean follow-up of 6 years (range 1-15.5 years). Traffic accidents (45%) and translational injuries (54%) were the most common mechanism and dominant fracture pattern, respectively. Neurologic deficits were frequent-53% had complete (American Spinal Injury Association impairment scale [AIS] A) spinal cord deficits on admission. Operative management was performed in 78%. Patients who sustain thoracic fractures, but escaped significant neurologic injury (AIS D or E on admission) had SF-36 scores that did not differ significantly from population norms at a mean follow-up of 6 years. Eighty-eight percent of this cohort was re-employed. Interestingly, Oswestry Disability Index scores remained inferior to healthy subjects. In contrast, SF-36 scores in those with more profound neurologic deficits at presentation (AIS A, B, or C) remained inferior to normative data. Fifty-seven percent were re-employed, 25% in their previous job type. Using multiple regression analysis, we found that comorbidity status (measured by the Charlson Comorbidity index) was the only independent predictor of SF-36 scores. Neurologic impairment (AIS) and adverse events were independent predictors of the SF-36 physical functioning subscale. Sagittal alignment and number of fused levels were not independent predictors. CONCLUSIONS At a mean follow-up of 6 years, patients who presented with thoracic fractures and AIS D or E neurologic status recovered a general health status not significantly inferior to population norms. Compared with other neurologic intact spinal injuries, patients with thoracic injuries have a favorable generic health-related quality-of-life prognosis. Inferior outcomes and re-employment prospects were noted in those with more significant neurologic deficits.
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Affiliation(s)
- Rowan Schouten
- Orthopaedic Department, Christchurch Hospital, Riccarton Ave., PO Box 4710, Christchurch 8140, New Zealand
| | - Ory Keynan
- Department of Orthopaedics, Tel Aviv Sourasky Medical Center, Weizmann 10, Tel Aviv, Israel
| | - Robert S Lee
- Department of Orthopaedics, Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 818 West 10th Ave., Room 6196, Vancouver, British Columbia V5Z 1M9, Canada
| | - John T Street
- Department of Orthopaedics, Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 818 West 10th Ave., Room 6196, Vancouver, British Columbia V5Z 1M9, Canada
| | - Michael C Boyd
- Department of Orthopaedics, Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 818 West 10th Ave., Room 6196, Vancouver, British Columbia V5Z 1M9, Canada
| | - Scott J Paquette
- Department of Orthopaedics, Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 818 West 10th Ave., Room 6196, Vancouver, British Columbia V5Z 1M9, Canada
| | - Brian K Kwon
- Department of Orthopaedics, Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 818 West 10th Ave., Room 6196, Vancouver, British Columbia V5Z 1M9, Canada
| | - Marcel F Dvorak
- Department of Orthopaedics, Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 818 West 10th Ave., Room 6196, Vancouver, British Columbia V5Z 1M9, Canada
| | - Charles G Fisher
- Department of Orthopaedics, Combined Neurosurgical and Orthopaedic Spine Program, University of British Columbia, Blusson Spinal Cord Center, 818 West 10th Ave., Room 6196, Vancouver, British Columbia V5Z 1M9, Canada.
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Santos A, Gurling J, Dvorak MF, Noonan VK, Fehlings MG, Burns AS, Lewis R, Soril L, Fallah N, Street JT, Bélanger L, Townson A, Liang L, Atkins D. Modeling the patient journey from injury to community reintegration for persons with acute traumatic spinal cord injury in a Canadian centre. PLoS One 2013; 8:e72552. [PMID: 24023623 PMCID: PMC3758357 DOI: 10.1371/journal.pone.0072552] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Accepted: 07/09/2013] [Indexed: 11/23/2022] Open
Abstract
Background A patient’s journey through the health care system is influenced by clinical and system processes across the continuum of care. Methods To inform optimized access to care and patient flow for individuals with traumatic spinal cord injury (tSCI), we developed a simulation model that can examine the full impact of therapeutic or systems interventions across the care continuum for patients with traumatic spinal cord injuries. The objective of this paper is to describe the detailed development of this simulation model for a major trauma and a rehabilitation centre in British Columbia (BC), Canada, as part of the Access to Care and Timing (ACT) project and is referred to as the BC ACT Model V1.0. Findings To demonstrate the utility of the simulation model in clinical and administrative decision-making we present three typical scenarios that illustrate how an investigator can track the indirect impact(s) of medical and administrative interventions, both upstream and downstream along the continuum of care. For example, the model was used to estimate the theoretical impact of a practice that reduced the incidence of pressure ulcers by 70%. This led to a decrease in acute and rehabilitation length of stay of 4 and 2 days, respectively and a decrease in bed utilization of 9% and 3% in acute and rehabilitation. Conclusion The scenario analysis using the BC ACT Model V1.0 demonstrates the flexibility and value of the simulation model as a decision-making tool by providing estimates of the effects of different interventions and allowing them to be objectively compared. Future work will involve developing a generalizable national Canadian ACT Model to examine differences in care delivery and identify the ideal attributes of SCI care delivery.
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Affiliation(s)
- Argelio Santos
- Rick Hansen Institute, Vancouver, Canada
- Division of Spine, Department of Orthopaedics, University of British Columbia, Vancouver, Canada
- * E-mail:
| | | | - Marcel F. Dvorak
- Division of Spine, Department of Orthopaedics, University of British Columbia, Vancouver, Canada
| | - Vanessa K. Noonan
- Rick Hansen Institute, Vancouver, Canada
- Division of Spine, Department of Orthopaedics, University of British Columbia, Vancouver, Canada
| | - Michael G. Fehlings
- Department of Surgery and Spinal Program, University of Toronto, Toronto, Canada
| | | | - Rachel Lewis
- Centre for Operations Excellence, Sauder School of Business, University of British Columbia, Vancouver, Canada
| | | | - Nader Fallah
- Rick Hansen Institute, Vancouver, Canada
- Division of Spine, Department of Orthopaedics, University of British Columbia, Vancouver, Canada
| | - John T. Street
- Division of Spine, Department of Orthopaedics, University of British Columbia, Vancouver, Canada
| | | | - Andrea Townson
- Division of Physical Medicine and Rehabilitation, University of British Columbia, Vancouver, Canada
| | - Liping Liang
- Faculty of Business, Lingnan University, Tuen Mun, New Territories, Hong Kong
| | - Derek Atkins
- Centre for Operations Excellence, Sauder School of Business, University of British Columbia, Vancouver, Canada
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Dipaola CP, Saravanja DD, Boriani L, Zhang H, Boyd MC, Kwon BK, Paquette SJ, Dvorak MFS, Fisher CG, Street JT. Postoperative infection treatment score for the spine (PITSS): construction and validation of a predictive model to define need for single versus multiple irrigation and debridement for spinal surgical site infection. Spine J 2012; 12:218-30. [PMID: 22386957 DOI: 10.1016/j.spinee.2012.02.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Revised: 09/22/2011] [Accepted: 02/07/2012] [Indexed: 02/08/2023]
Abstract
BACKGROUND CONTEXT There is very little evidence to guide treatment of patients with spinal surgical site infection (SSI) who require irrigation and debridement (I&D) in deciding need for single or multiple I&Ds or more complex wound management such as vacuum-assisted closure dressing or soft-tissue flaps. PURPOSE The purpose of this study was to build a predictive model that stratifies patients with spinal SSI, allowing us to determine which patients will need single versus multiple I&D. The model will be validated and will serve as evidence to support a scoring system to guide treatment. STUDY DESIGN A consecutive series of 128 patients from a tertiary spine center (collected from 1999 to 2005) who required I&D for spinal SSI were studied based on data from a prospectively collected outcomes database. METHODS More than 30 variables were identified by extensive literature review as possible risk factors for SSI and tested as possible predictors of risk for multiple I&D. Logistic regression was conducted to assess each variable's predictability by a "bootstrap" statistical method. A prediction model was built in which single or multiple I&D was treated as the "response" and risk factors as "predictors." Next, a second series of 34 different patients meeting the same criteria as the first population were studied. External validation of the predictive model was performed by applying the model to the second data set, and predicted probabilities were generated for each patient. Receiver operating characteristic curves were constructed, and the area under the curve (AUC) was calculated. RESULTS Twenty-four of one hundred twenty-eight patients with spinal SSI required multiple I&D. Six predictors: anatomical location, medical comorbidities, specific microbiology of the SSI, the presence of distant site infection (ie, urinary tract infection or bacteremia), the presence of instrumentation, and the bone graft type proved to be the most reliable predictors of need for multiple I&D. Internal validation of the predictive model yielded an AUC of 0.84. External validation analysis yielded AUC of 0.70 and 95% confidence interval of 0.51 to 0.89. By setting a probability cutoff of .24, the negative predictive value (NPV) for multiple I&D was 0.77 and positive predictive value (PPV) was 0.57. A probability cutoff of .53 yielded a PPV of 0.85 and NPV of 0.46. CONCLUSIONS Patients with positive methicillin-resistant Staphylococcus aureus culture or those with distant site infection such as bacteremia were strong predictors of need for multiple I&D. Presence of instrumentation, location of surgery in the posterior lumbar spine, and use of nonautograft bone graft material predicted multiple I&D. Diabetes also proved to be the most significant medical comorbidity for multiple I&D. The validation of this predictive model revealed excellent PPV and good NPV with appropriately chosen probability cutoff points. This study forms the basis for an evidence-based classification system, the Postoperative Infection Treatment Score for the Spine that stratifies patients who require surgery for SSI, based on specific spine, patient, infection, and surgical factors to assess a low, indeterminate, and high risk for the need for multiple I&D.
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Affiliation(s)
- Christian P Dipaola
- Department of Orthopaedics, University of Massachusetts Medical Center, Worcester, MA 01605, USA.
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Street JT, Lenehan BJ, DiPaola CP, Boyd MD, Kwon BK, Paquette SJ, Dvorak MFS, Rampersaud YR, Fisher CG. Morbidity and mortality of major adult spinal surgery. A prospective cohort analysis of 942 consecutive patients. Spine J 2012; 12:22-34. [PMID: 22209243 DOI: 10.1016/j.spinee.2011.12.003] [Citation(s) in RCA: 141] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Revised: 11/17/2011] [Accepted: 12/01/2011] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT To date, most reports on the incidence of adverse events (AEs) in spine surgery have been retrospective and dependent on data abstraction from hospital-based administrative databases. To our knowledge, there have been no previous rigorously performed prospective analysis of all AEs occurring in the entire population of patients presenting to an academic quaternary referral center. PURPOSE To determine the mortality and true incidence and severity of morbidity (major and minor, medical and surgical) in adults undergoing complex spinal surgery, both trauma and elective, in a quaternary referral center. To examine the influence of the introduction of a dedicated weekly multidisciplinary rounds, and a formal abstraction tool, on the recording of this prospective perioperative morbidity data. To examine the validity and inter- and intraobserver reliability of a dedicated Spine AdVerse Events Severity system, version 2 (SAVES V2) AE abstraction tool. STUDY DESIGN Ours is an academic quaternary referral center serving a population of 4.5 million people. Beginning in April 2008, a spine-specific AE-recording instrument, entitled SAVES V2, was introduced at our center for reporting, categorization, and classification of AEs. The use of this system remains an ongoing prospective study. PATIENT SAMPLE All adult patients admitted to the spine service of a quaternary referral center for a 12-month period. OUTCOME MEASURES A validity and an inter- and intraobserver reliability examination of the SAVES V2 system, as used at our institution. Morbidity and inhospital deaths, unplanned second surgeries during index admission, wound infections requiring reoperation, and readmissions during the same calendar year. We also examined in detail all intraoperative and nonsurgical postoperative AEs, as well as hospital length of stay (LOS). METHODS Data on all patients undergoing surgery over a 12-month period were prospectively collected using a perioperative morbidity abstraction tool at weekly dedicated mortality and morbidity rounds. This tool allows identification of each specific AE and grades the severity. Before the introduction of this system, and using the hospital inpatient database, our documented perioperative morbidity rate (major and minor, medical and surgical) was 23%. Diagnosis, operative data, hospital data, major and minor complications both medical and surgical, and deaths were recorded. RESULTS One hundred percent of all patients discharged from the unit had complete data available for analysis. Nine hundred forty-two patients with an age range of 16 to 90 years (mean, 54 years; mode, 38 years) were identified. There were 552 males and 390 females. Around 58.5% of patients had undergone elective surgery. Thirty percent of patients were American Spinal Injury Association class D or worse on admission. The average LOS was 13.5 days (range, 1-221 days). Eight hundred twenty-two (87%) patients had at least one documented complication. Thirty-nine percent of these adversely affected hospital LOS. There were 14 mortalities during the study period. The rate of intraoperative surgical complication was 10.5% (4.5% incidental durotomy and 1.9% hardware malposition requiring revision and 2.2% blood loss >2 L). The incidence of postoperative complication was 73.5% (wound complications, 13.5%; delerium, 8%; pneumonia, 7%; neuropathic pain, 5%; dysphagia, 4.5%; and neurological deterioration, 3%). CONCLUSIONS Major spinal surgery in the adult is associated with a high incidence of intra- and postoperative complications. We identified a very high rate of previously unrecognized postoperative complications, which adversely affect LOS. Without strict adherence to a prospective data collection system, the true complexity of this surgery may be greatly underestimated.
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Affiliation(s)
- John T Street
- Combined Neurosurgical and Orthopedic Spine Program, Vancouver General Hospital, University of British Columbia, Floor 6, Blusson Spinal Cord Center, 818 West 10th Ave., Vancouver, British Columbia, Canada.
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Yeo JM, Vertinsky AT, Chew JB, Heran MKS, Shewchuk J, Malfair D, Graeb DA, Street JT. Imaging in adult scoliosis: preoperative assessment and postoperative complications. Semin Musculoskelet Radiol 2011; 15:143-50. [PMID: 21500134 DOI: 10.1055/s-0031-1275597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Adult scoliosis rates range from 2 to 32%. Surgery for scoliosis is common. Accurate and surgically relevant information should be provided to the referring surgeon from pre- and postoperative imaging. There are various methods to correct scoliosis surgically with the end points correction of the curve and relief of symptoms. This is achieved through the placement of spinal instrumentation with a goal of osseous fusion across the instrumented levels. There are many potential postoperative complications. The initial and postoperative imaging, types of surgery, and hardware are reviewed along with the common early and late complications with relevant illustrations.
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Affiliation(s)
- Jason M Yeo
- Division of Neuroradiology, Vancouver General Hospital, Vancouver, British Columbia, Canada
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Delaney RA, Lenehan B, O'sullivan L, McGuinness AJ, Street JT. The limping child: an algorithm to outrule musculoskeletal sepsis. Ir J Med Sci 2007; 176:181-7. [PMID: 17624502 DOI: 10.1007/s11845-007-0061-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2006] [Accepted: 06/20/2007] [Indexed: 11/26/2022]
Abstract
BACKGROUND The acutely limping child presents a significant diagnostic challenge. AIM The purpose of this study was to create a clinically useful algorithm to allow exclusion of 'musculoskeletal sepsis' as a differential diagnosis in the child presenting with limp. METHODS Data were collected on all 286 limping children admitted to our centre over a 3-year-period. Using logistic regression analysis, the predictive model was constructed, to exclude infection. RESULTS Duration of symptoms, constitutional symptoms, temperature, white cell count and ESR were significantly different in children with musculoskeletal infection (P < 0.05). Multivariate analysis demonstrated that when all three variables of duration of symptoms >1, <5 days; temperature >37.0 degrees C; and ESR >35 mm/h were present, the predicted probability of infection was 0.66, falling to 0.01 when none were present. CONCLUSION This multivariate model enables us to rule out musculoskeletal infection with 99% certainty in limping children with none of these three presenting variables.
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Affiliation(s)
- R A Delaney
- Department of Trauma and Orthopaedics, Cork University Hospital, Cork, Ireland.
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Laing AJ, Dillon JP, Condon ET, Coffey JC, Street JT, Wang JH, McGuinness AJ, Redmond HP. A systemic provascular response in bone marrow to musculoskeletal trauma in mice. ACTA ACUST UNITED AC 2007; 89:116-20. [PMID: 17259429 DOI: 10.1302/0301-620x.89b1.18222] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Post-natal vasculogenesis, the process by which vascular committed bone marrow stem cells or endothelial precursor cells migrate, differentiate and incorporate into the nacent endothelium and thereby contribute to physiological and pathological neurovascularisation, has stimulated much interest. Its contribution to neovascularisation of tumours, wound healing and revascularisation associated with ischaemia of skeletal and cardiac muscles is well established. We evaluated the responses of endothelial precursor cells in bone marrow to musculoskeletal trauma in mice. Bone marrow from six C57 Black 6 mice subjected to a standardised, closed fracture of the femur, was analysed for the combined expression of cell-surface markers stem cell antigen 1 (sca-1+) and stem cell factor receptor, CD117 (c-kit+) in order to identify the endothelial precursor cell population. Immunomagnetically-enriched sca-1+ mononuclear cell (MNCsca-1+) populations were then cultured and examined for functional vascular endothelial differentiation. Bone marrow MNCsca-1+,c-kit+ counts increased almost twofold within 48 hours of the event, compared with baseline levels, before decreasing by 72 hours. Sca-1+ mononuclear cell populations in culture from samples of bone marrow at 48 hours bound together Ulex Europus-1, and incorporated fluorescent 1,1′-dioctadecyl- 3,3,3,’3′-tetramethylindocarbocyanine perchlorate-labelled acetylated low-density lipoprotein intracellularily, both characteristics of mature endothelium. Our findings suggest that a systemic provascular response of bone marrow is initiated by musculoskeletal trauma. Its therapeutic manipulation may have implications for the potential enhancement of neovascularisation and the healing of fractures.
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Affiliation(s)
- A J Laing
- Department of Surgical, Research and Orthopaedic Surgery, Cork University Hospital, Wilton, Cork, Republic of Ireland.
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Laing AJ, Dillon JP, Condon ET, Street JT, Wang JH, McGuinness AJ, Redmond HP. Mobilization of endothelial precursor cells: systemic vascular response to musculoskeletal trauma. J Orthop Res 2007; 25:44-50. [PMID: 17001704 DOI: 10.1002/jor.20228] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Postnatal vasculogenesis, the process by which vascular committed bone marrow stem cells or endothelial precursor cells (EPC) migrate, differentiate, and incorporate into the nacent endothelium contributing to physiological and pathological neovascularization, has stimulated much interest. Its contribution to tumor nonvascularization, wound healing, and revascularization associated with skeletal and cardiac muscles ischaemia is established. We evaluated the mobilization of EPCs in response to musculoskeletal trauma. Blood from patients (n = 15) following AO type 42a1 closed diaphyseal tibial fractures was analyzed for CD34 and AC133 cell surface marker expression. Immunomagnetically enriched CD34+ mononuclear cell (MNC(CD34+)) populations were cultured and examined for phenotypic and functional vascular endothelial differentiation. Circulating MNC(CD34+) levels increased sevenfold by day 3 postinjury. Circulating MNC(AC133+) increased 2.5-fold. Enriched MNC(CD34+) populations from day 3 samples in culture exhibited cell cluster formation with sprouting spindles. These cells bound UEA-1 and incorporated fluorescent DiI-Ac-LDL intracellularily. Our findings suggest a systemic provascular response is initiated in response to musculoskeletal trauma. Its therapeutic manipulation may have implications for the potential enhancement of fracture healing.
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Affiliation(s)
- A J Laing
- Departments of Surgical Research and Orthopaedic Surgery, Cork University Hospital, Cork, Ireland.
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Abstract
The use of lateral mass screws for posterior cervical fixation has become widespread. It allows for stable fixation in the absence of the posterior elements and confers immediate stability. Lateral mass fixation has been shown to impart equal or greater biomechanical stability when compared to posterior interosseous wiring or anterior plating. The utilization of intraoperative fluoroscopy to guide screw placement has been recommended previously and is considered routine practice in many centers. This prospective study shows that lateral mass screws can be safely positioned without intraoperative fluoroscopy. The procedure is both safe and effective, provided that the operator has a thorough understanding of lateral mass anatomy coupled with careful adherence to the established guidelines for screw positioning. Exposure to radiation is reduced and time taken for operation can be shortened.
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Affiliation(s)
- Simon Roche
- Department of Orthopaedic and Trauma Surgery, Merlin Park Regional Hospital, Galway, Ireland.
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Dillon JP, Laing AJ, Cahill RA, O'Brien GC, Street JT, Wang JH, Mc Guinness A, Redmond HP. Activated protein C attenuates acute ischaemia reperfusion injury in skeletal muscle. J Orthop Res 2005; 23:1454-9. [PMID: 15994053 DOI: 10.1016/j.orthres.2005.04.009.1100230631] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2005] [Accepted: 04/26/2005] [Indexed: 02/04/2023]
Abstract
Activated protein C (APC) is an endogenous anti-coagulant with anti-inflammatory properties. The purpose of the present study was to evaluate the effects of activated protein C in the setting of skeletal muscle ischaemia reperfusion injury (IRI). IRI was induced in rats by applying rubber bands above the levels of the greater trochanters bilaterally for a period of 2h followed by 12h reperfusion. Treatment groups received either equal volumes of normal saline or activated protein C prior to tourniquet release. Following 12h reperfusion, muscle function was assessed electrophysiologically by electrical field stimulation. The animals were then sacrificed and skeletal muscle harvested for evaluation. Activated protein C significantly attenuated skeletal muscle reperfusion injury as shown by reduced myeloperoxidase content, wet to dry ratio and electrical properties of skeletal muscle. Further in vitro work was carried out on neutrophils isolated from healthy volunteers to determine the direct effect of APC on neutrophil function. The effects of APC on TNF-alpha stimulated neutrophils were examined by measuring CD18 expression as well as reactive oxygen species generation. The in vitro work demonstrated a reduction in CD18 expression and reactive oxygen species generation. We conclude that activated protein C may have a protective role in the setting of skeletal muscle ischaemia reperfusion injury and that this is in part mediated by a direct inhibitory effect on neutrophil activation.
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Affiliation(s)
- J P Dillon
- Department of Academic Surgery and Orthopaedics, Cork University Hospital and National University of Ireland, Cork, Ireland.
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Power C, Wang JH, Sookhai S, Street JT, Redmond HP. Bacterial wall products induce downregulation of vascular endothelial growth factor receptors on endothelial cells via a CD14-dependent mechanism: implications for surgical wound healing. J Surg Res 2001; 101:138-45. [PMID: 11735268 DOI: 10.1006/jsre.2001.6270] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
INTRODUCTION Vascular endothelial growth factor (VEGF) is a potent mitogenic cytokine which has been identified as the principal polypeptide growth factor influencing endothelial cell (EC) migration and proliferation. Ordered progression of these two processes is an absolute prerequisite for initiating and maintaining the proliferative phase of wound healing. The response of ECs to circulating VEGF is determined by, and directly proportional to, the functional expression of VEGF receptors (KDR/Flt-1) on the EC surface membrane. Systemic sepsis and wound contamination due to bacterial infection are associated with significant retardation of the proliferative phase of wound repair. The effects of the Gram-negative bacterial wall components lipopolysaccharide (LPS) and bacterial lipoprotein (BLP) on VEGF receptor function and expression are unknown and may represent an important biological mechanism predisposing to delayed wound healing in the presence of localized or systemic sepsis. MATERIALS AND METHODS We designed a series of in vitro experiments investigating this phenomenon and its potential implications for infective wound repair. VEGF receptor density on ECs in the presence of LPS and BLP was assessed using flow cytometry. These parameters were assessed in hypoxic conditions as well as in normoxia. The contribution of CD14 was evaluated using recombinant human (rh) CD14. EC proliferation in response to VEGF was quantified in the presence and absence of LPS and BLP. RESULTS Flow cytometric analysis revealed that LPS and BLP have profoundly repressive effects on VEGF receptor density in normoxic and, more pertinently, hypoxic conditions. The observed downregulation of constitutive and inducible VEGF receptor expression on ECs was not due to any directly cytotoxic effect of LPS and BLP on ECs, as measured by cell viability and apoptosis assays. We identified a pivotal role for soluble/serum CD14, a highly specific bacterial wall product receptor, in mediating these effects. The decreased VEGF receptor density on ECs accruing from the presence of bacterial wall products resulted in EC hyporesponsiveness to rhVEGF and significant abolition of VEGF-directed EC proliferation. CONCLUSION These findings suggest that the well-recognized relationship between bacterial sepsis and attenuated wound healing may be due, in part, to the directly suppressive effects of bacterial wall components on EC VEGF receptor expression and, consequently, EC proliferation.
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Affiliation(s)
- C Power
- Department of Academic Surgery, Cork University Hospital, Wilton, Cork, Ireland.
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Abstract
BACKGROUND Tourniquet-induced reperfusion injury in animals produces significant systemic inflammatory effects. This study investigated whether a biologic response occurs in a clinically relevant model of tourniquet-induced reperfusion injury. METHODS Patients undergoing elective knee arthroscopy were prospectively randomized into controls (no tourniquet) and subjects (tourniquet-controlled). The effects of tourniquet-induced reperfusion on monocyte activation state, neutrophil activation state, and transendothelial migration (TEM) were studied. Changes in the cytokines implicated in reperfusion injury, tumor necrosis factor-alpha, interleukin (IL)-1beta, and IL-10 were also determined. RESULTS After 15 minutes of reperfusion, neutrophil and monocyte activation were significantly increased. Pretreatment of neutrophils with pooled subject (ischemia-primed) plasma significantly increased TEM. In contrast, TEM was not significantly altered by ischemia-primed plasma pretreatment of the endothelial monolayer. Significant elevation of tumor necrosis factor-alpha and IL-1beta were observed in subjects compared with controls after 15 minutes of reperfusion. There was no significant difference in serum IL-10 levels between the groups at all the time points studied. CONCLUSION These results indicate a transient neutrophil and monocyte activation after tourniquet-ischemia that translates into enhanced neutrophil transendothelial migration with potential for tissue injury.
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Affiliation(s)
- A Wakai
- Department of Academic Surgery, Cork University Hospital, Cork, Ireland
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Abstract
Angiogenesis is essential for normal bone formation and repair. Avascularity characterizes aberrant fracture union in the elderly, while angiogenic mechanisms during cutaneous wound repair are attenuated in aged humans. We hypothesized that skeletal injury results in local (circulating) and systemic (fracture site) 'angiogenic' responses and that these reparative mechanisms are attenuated with advanced patient age. This prospective study examined peripheral blood and fracture hematoma from 32 patients, 16 under 40 years and 16 over the age of 75, undergoing emergent surgery for isolated fracture. The angiogenic cytokines vascular endothelial growth factor (VEGF) and platelet-derived growth factor (PDGF) were assayed. Endothelial cell cultures were supplemented with patient plasma and fracture hematoma and angiogenesis determined in vitro by measuring cell proliferation and blood vessel tube formation. Angiogenesis was determined in vivo using a murine dorsal wound pocket model and quantification of new blood vessel formation after 7 days. We found that all injured patients, irrespective of age, have elevated plasma and fracture hematoma levels of VEGF and PDGF. These elevated cytokine concentrations translate into biologically significant angiogenic effects, in vitro and in vivo. These effects are primarily VEGF mediated and are not dependent on patient age. The biological activity of these growth factors does not diminish with advanced age. Thus skeletal injury does result in local and systemic angiogenic responses whereby angiogenic cytokine availability and activity is preserved in the aged suggesting alternative mechanisms for the development of avascularity in delayed and fracture non-union in the elderly.
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Affiliation(s)
- J T Street
- Department of Academic Surgery, National Univesity of Ireland, Cork.
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Abstract
Pneumatic tourniquets maintain a relatively bloodless field during extremity surgery, minimize blood loss, aid identification of vital structures, and expedite the procedure. However, they may induce an ischemia-reperfusion injury with potentially harmful local and systemic consequences. Modern pneumatic tourniquets are designed with mechanisms to regulate and maintain pressure. Routine maintenance helps ensure that these systems are working properly. The complications of tourniquet use include postoperative swelling, delay of recovery of muscle power, compression neurapraxia, wound hematoma with the potential for infection, vascular injury, tissue necrosis, and compartment syndrome. Systemic complications can also occur. The incidence of complications can be minimized by use of wider tourniquets, careful preoperative patient evaluation, and adherence to accepted principles of tourniquet use.
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Affiliation(s)
- A Wakai
- Department of Academic Surgery, Cork University Hospital, Cork, Ireland
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Abstract
BACKGROUND Adenosine attenuates skeletal muscle reperfusion injury, but its short half-life in vivo limits potential therapeutic benefits. The aim of this study was to ascertain whether inosine, a stable adenosine metabolite, modulates skeletal muscle reperfusion injury. MATERIALS AND METHODS C57BL/6 mice were randomized (8-10 per group) to six groups: time controls; inosine (100 mg/kg) before anesthesia; 2 h of bilateral tourniquet hindlimb ischemia; I/R (2 h of bilateral tourniquet hindlimb ischemia, 3 h of reperfusion); inosine (100 mg/kg) before I/R; drug vehicle before I/R. Serum tumor necrosis factor (TNF)-alpha and macrophage inflammatory protein (MIP)-2 were measured before ischemia and at the end of reperfusion. Tissue edema was determined by wet/dry weight ratios. Tissue leucosequestration was assessed by the myeloperoxidase (MPO) content. RESULTS At the end of reperfusion, inosine pretreatment resulted in lower MPO levels in muscle (P = 0.02) and lung (P = 0.0002) than saline pretreatment. Similarly, muscle (P = 0.04) and lung (P = 0.02) wet/dry ratios were significantly reduced with inosine but not with saline pretreatment. At the end of reperfusion, serum proinflammatory cytokine levels (TNF-alpha and MIP-2) were significantly reduced (P < 0.05) compared to preischemia levels following inosine pretreatment but not saline pretreatment. Ischemia alone did not alter any of the parameters assessed. CONCLUSIONS These findings demonstrate that pretreatment with inosine attenuates the local and systemic proinflammatory responses associated with skeletal muscle reperfusion injury.
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Affiliation(s)
- A Wakai
- Department of Academic Surgery, Cork University Hospital, Cork, Republic of Ireland
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Wakai A, Wang JH, Winter DC, Street JT, O'Sullivan RG, Redmond HP. Adenosine inhibits neutrophil vascular endothelial growth factor release and transendothelial migration via A2B receptor activation. Shock 2001; 15:297-301. [PMID: 11303729 DOI: 10.1097/00024382-200115040-00008] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The effects of adenosine on neutrophil (polymorphonuclear neutrophils; PMN)-directed changes in vascular permeability are poorly characterized. This study investigated whether adenosine modulates activated PMN vascular endothelial growth factor (vascular permeability factor; VEGF) release and transendothelial migration. PMN activated with tumour necrosis factor-alpha (TNF-alpha, 10 ng/mL) were incubated with adenosine and its receptor-specific analogues. Culture supernatants were assayed for VEGF. PMN transendothelial migration across human umbilical vein endothelial cell (HUVEC) monolayers was assessed in vitro. Adhesion molecule receptor expression was assessed flow cytometrically. Adenosine and some of its receptor-specific analogues dose-dependently inhibited activated PMN VEGF release. The rank order of potency was consistent with the affinity profile of human A2B receptors. The inhibitory effect of adenosine was reversed by 3,7-dimethyl-1-propargylxanthine, an A2 receptor antagonist. Adenosine (100 microM) or the A2B receptor agonist 5'-N-ethylcarboxamidoadenosine (NECA, 100 microM) significantly reduced PMN transendothelial migration. However, expression of activated PMN beta2 integrins and HUVEC ICAM-1 were not significantly altered by adenosine or NECA. Adenosine attenuates human PMN VEGF release and transendothelial migration via the A2B receptor. This provides a novel target for the modulation of PMN-directed vascular hyperpermeability in conditions such as the capillary leak syndrome.
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Affiliation(s)
- A Wakai
- Department of Academic Surgery, Cork University Hospital, Cork, Republic of Ireland
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45
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Abstract
Low molecular weight heparins are significantly superior to unfractionated heparin or warfarin in the prevention of thromboembolic episodes associated with orthopaedic surgery. Therapeutic doses of heparin and warfarin have been shown to delay bone repair in a rabbit model. The current study investigated the effect of prophylactic administration of a low molecular weight heparin, enoxaparin, on the healing of a closed rabbit rib fracture. Fracture healing was assessed using histomorphometric, histologic, and immunohistochemical methods at 3, 7, and 14 days, and biomechanical testing with torsional loading was assessed after 21 days. Bone repair was significantly attenuated at all times in animals receiving subcutaneous enoxaparin compared with that of the control animals. Numerous putative mechanisms for this phenomenon are discussed, and additional studies are proposed to elucidate the effects of this pharmacologically diverse group of compounds on all aspects of bone physiology and repair.
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Affiliation(s)
- J T Street
- Department of Academic Surgery, Cork University Hospital/University College Cork, Ireland
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46
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47
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Abstract
Road accident trauma is a leading cause of death and serious morbidity among healthy young adults in the developed world. The Irish Republic has the third worst road safety record in the EU. In studying the unique demographics of rural road accidents, our aim was to provide information essential to the future development of trauma care in Ireland. Our figures highlight the inadequacies of data received by the National Roads Authority, illustrate the resource impact of road trauma on a peripheral hospital, and demonstrate the need for similar studies in the rationalisation of trauma care as we approach the next millennium.
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Affiliation(s)
- J T Street
- Department of Orthopaedic Surgery, Cork University Hospital, Wilton, Ireland
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48
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O'Leary JJ, Browne G, Johnson MI, Landers RJ, Crowley M, Healy I, Street JT, Pollock AM, Lewis FA, Andrew A. PCR in situ hybridisation detection of HPV 16 in fixed CaSki and fixed SiHa cell lines. J Clin Pathol 1994; 47:933-8. [PMID: 7962608 PMCID: PMC502179 DOI: 10.1136/jcp.47.10.933] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
AIMS To investigate the feasibility of using fixed cells with the polymerase chain reaction (PCR) in situ hybridisation and to investigate possible reasons for reaction failure. METHODS Fixed SiHa and CaSki cells were used in an experimental model of PCR in situ hybridisation for the detection of low and intermediate copy number viral infection in fixed cells. RESULTS PCR in situ hybridisation was able to detect one to two copies of human papillomavirus (HPV) 16 in SiHa cells, using small fragment amplicons (120 base pairs), confirming the high detection sensitivity and flexibility of the technique. Problems were encountered with localisation of PCR amplified product in CaSki cells (200-300 copies of HPV 16 per cell) owing to diffusion of product post amplification. Overall, 40% of reactions were successful, which confirms the current unreliability of the technique. Within cell preparations, about 50% of cells contained amplified product. CONCLUSION PCR in situ hybridisation represents the marriage of two revolutionary molecular pathological techniques. However, it is currently unreliable, with reaction failure common. Standardised, dedicated equipment is urgently required if the technique is to achieve universal acceptance. In the future, the technique may be used to detect chromosomal translocations in human tumours and to study cellular gene expression.
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Affiliation(s)
- J J O'Leary
- Nuffield Department of Pathology and Bacteriology, University of Oxford
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49
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O'Leary JJ, Browne G, Landers RJ, Crowley M, Healy IB, Street JT, Pollock AM, Murphy J, Johnson MI, Lewis FA. The importance of fixation procedures on DNA template and its suitability for solution-phase polymerase chain reaction and PCR in situ hybridization. Histochem J 1994; 26:337-46. [PMID: 8040006 DOI: 10.1007/bf00157767] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Conventional solution-phase polymerase chain reaction (PCR) and in situ PCR/PCR in situ hybridization are powerful tools for retrospective analysis of fixed paraffin wax-embedded material. Amplification failure using these techniques is now encountered in some centres using archival fixed tissues. Such 'failures' may not only be due to absent target DNA sequences in the tissues, but may be a direct effect of the type of fixative, fixation time and/or fixation temperature used. The type of nucleic acid extraction procedure applied will also influence amplification results. This is particularly true with in situ PCR/PCR in situ hybridization. To examine these effects in solution-phase PCR, beta-globin gene was amplified in 100 mg pieces of tonsillar tissue fixed in Formal saline, 10% formalin, neutral buffered formaldehyde, Carnoy's Bouin's, buffered formaldehyde sublimate, Zenker's, Helly's and glutaraldehyde at 0 to 4 degrees C, room temperature and 37 degrees C fixation temperatures and for fixation periods of 6, 24, 48 and 72 hours and 1 week. DNA extraction procedures used were simple boiling and 5 days' proteinase K digestion at 37 degrees C. Amplified product was visible primarily yet variably from tissue fixed in neutral buffered formaldehyde and Carnoy's, whereas fixation in mercuric chloride-based fixatives produced consistently negative results. Room temperature and 37 degrees C fixation temperature appeared most conducive to yielding amplifiable DNA template. Fixation times of 24 and 48 hours in neutral buffered formaldehyde and Carnoy's again favoured amplification.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- J J O'Leary
- Department of Pathology, University of Leeds, UK
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