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Reddy A, Miley EN, Parvataneni HK, Prieto HA, Gray CF. Reversal of the Halo Effect: Prolonged Participation in Comprehensive Care for Joint Replacement Negatively Impacts Revision Metrics. Arthroplast Today 2024; 28:101466. [PMID: 39100415 PMCID: PMC11295625 DOI: 10.1016/j.artd.2024.101466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 05/07/2024] [Accepted: 06/10/2024] [Indexed: 08/06/2024] Open
Abstract
Background The downstream regional effect of the Comprehensive Care for Joint Replacement (CJR) program on care pathway-adjacent patients, including revision arthroplasty patients, is poorly understood. Prior studies have demonstrated that care pathways targeting primary total joint arthroplasty may produce a halo effect, impacting more complex patients with parallel care pathways. However, neither the effect of regional referral changes from CJR nor the durability of these positive changes with prolonged bundle participation has been assessed. Methods Blinded data were pulled from electronic medical records. Primary analyses focused on the effect of CJR participation from 2015 (baseline) to 2020 (final participation year) at a tertiary care safety-net hospital. Patient demographics were evaluated using multivariate analysis of variance and chi-square calculations between procedure types over time. Results Patients who underwent revision total knee arthroplasty (N = 376) and revision total hip arthroplasty (N = 482) were included. More patients moved through the revision-care pathway over the participation period, with volume increasing by 42% over time. Patients became more medically complex: the Charlson comorbidity index increased from 3.91 to 4.65 (P = .01). The mean length of stay decreased from 5.14 days to 4.50 days (P = .03), but the all-cause complication (8.3%-15.2%; P = .02) and readmission rates (13.6%-16.6%; P = .19) increased over time. Conclusions Despite care pathway improvements over 5 years of CJR participation, revision patients did not display clear benefits in quality metrics but demonstrated a considerable increase in volume and medical complexity over time. The care of these patients may supersede even thoughtfully implemented care pathways, especially when referral burden increases, as may be prone to happen in regional, financial risk-conferring value-based programs. Understanding the impact of mandatory bundled payment programs like CJR on the care of arthroplasty patients regionally will be essential as value-based programs evolve.
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Affiliation(s)
- Akshay Reddy
- College of Medicine, University of Florida, Gainesville, FL, USA
| | - Emilie N. Miley
- Department of Orthopaedic Surgery, College of Medicine, University of Florida, Gainesville, FL
| | | | - Hernan A. Prieto
- Department of Orthopaedic Surgery, College of Medicine, University of Florida, Gainesville, FL
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Nourie BO, Cozzarelli NF, Krueger CA, Donnelly PC, Fillingham YA. Antibiotic Laden Bone Cement Does Not Reduce Acute Periprosthetic Joint Infection Risk in Primary Total Knee Arthroplasty. J Arthroplasty 2024:S0883-5403(24)00416-9. [PMID: 38703925 DOI: 10.1016/j.arth.2024.04.068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 04/22/2024] [Accepted: 04/23/2024] [Indexed: 05/06/2024] Open
Abstract
BACKGROUND Periprosthetic joint infection (PJI) can be a serious complication of total knee arthroplasty (TKA). A method believed to decrease the incidence of PJI is antibiotic-laden bone cement (ALBC). Current clinical practice guidelines do not recommend ALBC in primary TKA. The purpose of this study was to compare ALBC to plain cement (PC) in preventing PJI in primary TKA. METHODS This retrospective analysis included 109,242 Medicare patients in the American Joint Replacement Registry who underwent a cemented primary TKA from January 2017 to March 2021, and had at least 1 year of follow-up. Patients who received ALBC were compared to patients who received PC. Demographic and case-specific variables such as age, sex, race, body mass index, Charlson Comorbidity Index, anesthesia type, and operative time were used to create propensity scores. A logistic regression was run to predict the probability of receiving ALBC. Also, a multivariate model was run on the full unstratified population, using the same covariates as were used to create the propensity model. The primary outcome was differences in PJI rates. RESULTS Logistic regression analysis showed that a higher preoperative diagnosis of osteoarthritis, higher Charlson Comorbidity Index, higher body mass index, women, race, and anesthesia requirements increased a patient's probability of receiving ALBC. In the full unstratified multivariate model, ALBC did not show a statistically significant difference in risk of revision for infection compared to PC. CONCLUSIONS The use of ALBC in primary TKA has not been shown to be more efficacious in preventing PJI within the population of Medicare patients in the United States. However, this study is limited given it is a retrospective database study that may inherently have biases and the large dataset has a potential for overpowering the findings.
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Affiliation(s)
- Blake O Nourie
- Department of Orthopedic Surgery, Albany Medical Center, Albany, New York
| | - Nicholas F Cozzarelli
- Department of Orthopedic Surgery, Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Chad A Krueger
- Department of Orthopedic Surgery, Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania
| | | | - Yale A Fillingham
- Department of Orthopedic Surgery, Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania
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Pradhan TN, Viswanathan VK, Badge R, Pradhan N. Single-stage revision in the management of prosthetic joint infections after total knee arthroplasty - A review of current concepts. J Clin Orthop Trauma 2024; 52:102431. [PMID: 38854773 PMCID: PMC11153906 DOI: 10.1016/j.jcot.2024.102431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 05/08/2024] [Accepted: 05/24/2024] [Indexed: 06/11/2024] Open
Abstract
Introduction Prosthetic joint infection (PJI) is a devastating complication following total knee arthroplasty (TKA); and the gold standard surgical approach involves a two-staged, revision TKA (TSR). Owing to the newer, emerging evidence on this subject, there has been gradual shift towards a single-stage revision approach (SSR), with the purported benefits of mitigated patient morbidity, decreased complications and reduced costs. However, there is still substantial lacuna in the evidence regarding the safety and outcome of the two approaches in chronic PJI. This study aimed to comprehensively review of the literature on SSR; and evaluate its role within Revision TKA post PJI. Methods The narrative review involved a comprehensive search of the databases (Embase, Medline and Pubmed), conducted on 20th of January 2024 using specific key words. All the manuscripts discussing the use of SSR for the management of PJI after TKA were considered for the review. Among the screened manuscripts, opinion articles, letters to the editor and non-English manuscripts were excluded. Results The literature search yielded a total 232 studies. Following a detailed scrutiny of these manuscripts, 26 articles were finally selected. The overall success rate following SSR is reported to range from 73 % to 100 % (and is comparable to TSR). SSR is performed in PJI patients with bacteriologically-proven infection, adequate soft tissue cover, immuno-competent host and excellent tolerance to antibiotics. The main difference between SSR and TSR is that the interval between the 2 stages is only a few minutes instead of 6 weeks. Appropriate topical, intraoperative antibiotic therapy, followed by adequate postoperative systemic antibiotic cover are necessary to ascertain good outcome. Some of the major benefits of SSR over TSR include reduced morbidity, decreased complications (such as arthrofibrosis or anesthesia-associated adverse events), meliorated extremity function, earlier return to activities, mitigated mechanical (prosthesis-associated) complications and enhanced patient satisfaction. Conclusion SSR is a reliable approach for the management of chronic PJI. Based on our comprehensive review of the literature, it may be concluded that the right selection of patients, extensive debridement, sophisticated reconstruction strategy, identification of the pathogenic organism, initiation of appropriate antibiotic therapy and ensuring adequate follow-up are the key determinants of successful outcome. To achieve this will undoubtedly require an MDT approach to be taken on a case-by-case basis.
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Affiliation(s)
- Tej Nikhil Pradhan
- University College London, London, UK
- Imperial College London, London, UK
| | | | - Ravi Badge
- Warrington and Halton Hospitals NHS Foundation Trust, Warrington, UK
- Edge Hill University, Ormskirk, UK
- Liverpool University, Liverpool, UK
- Diploma in Sports Medicine (International Olympic Committee), UK
| | - Nikhil Pradhan
- Warrington and Halton Hospitals NHS Foundation Trust, Warrington, UK
- Edge Hill University, Ormskirk, UK
- University of Chester, Chester, UK
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Murphy MP, Boubekri AM, Eikani CK, Brown NM. Inpatient Hospital Costs, Emergency Department Visits, and Readmissions for Revision Hip and Knee Arthroplasty. J Arthroplasty 2024:S0883-5403(24)00355-3. [PMID: 38640968 DOI: 10.1016/j.arth.2024.04.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 04/07/2024] [Accepted: 04/10/2024] [Indexed: 04/21/2024] Open
Abstract
BACKGROUND Revision total hip arthroplasty (THA) and total knee arthroplasty (TKA) tremendously burden hospital resources. This study evaluated factors influencing perioperative costs, including emergency department (ED) visits, readmissions, and total costs-of-care within 90 days following revision surgery. METHODS A retrospective analysis of 772 revision TKAs and THAs performed on 630 subjects at a single center between January 2007 and December 2019 was conducted. Cost data were available from January 2015 to December 2019 for 277 patients. Factors examined included comorbidities, demographic information, preoperative Anesthesia Society of Anesthesiologists score, implant selection, and operative indication using mixed-effects linear regression models. RESULTS Among 772 revisions (425 THAs and 347 TKAs), 213 patients required an ED visit, and 90 required hospital readmission within 90 days. There were 22.6% of patients who underwent a second procedure after their initial revision. Liver disease was a significant predictor of ED readmission for THA patients (multivariable odds ratio [OR]: 3.473, P = .001), while aseptic loosening, osteolysis, or instability significantly reduced the odds of readmission for TKA patients (OR: 0.368, P = .014). In terms of ED visits, liver disease increased the odds for THA patients (OR: 1.845, P = .100), and aseptic loosening, osteolysis, or instability decreased the odds for TKA patients (OR: 0.223, P < .001). Increased age was associated with increased costs in both THA and TKA patients, with significant cost factors including congestive heart failure for TKA patients (OR: $7,308.17, P = .004) and kidney disease for THA patients. Revision surgeries took longer than primary ones, with TKA averaging 3.0 hours (1.6 times longer) and THA 2.8 hours (1.5 times longer). CONCLUSIONS Liver disease increases ED readmission risk in revision THA, while aseptic loosening, osteolysis, or instability decreases it in revision TKA. Increased age and congestive heart failure are associated with increased costs. These findings inform postoperative care and resource allocation in revision arthroplasty. LEVEL OF EVIDENCE Economic and Decision Analysis, Level IV.
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Affiliation(s)
- Michael P Murphy
- Department of Orthopaedic Surgery and Rehabilitation, Loyola University Medical Center, Maywood, Illinois
| | - Amir M Boubekri
- Department of Orthopaedic Surgery and Rehabilitation, Loyola University Medical Center, Maywood, Illinois
| | - Carlo K Eikani
- Department of Orthopaedic Surgery and Rehabilitation, Loyola University Medical Center, Maywood, Illinois
| | - Nicholas M Brown
- Department of Orthopaedic Surgery and Rehabilitation, Loyola University Medical Center, Maywood, Illinois
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Harris AB, Lantieri MA, Agarwal AR, Golladay GJ, Thakkar SC. Osteoporosis and Total Knee Arthroplasty: Higher 5-Year Implant-Related Complications. J Arthroplasty 2024; 39:948-953.e1. [PMID: 37914037 DOI: 10.1016/j.arth.2023.10.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 10/18/2023] [Accepted: 10/20/2023] [Indexed: 11/03/2023] Open
Abstract
BACKGROUND The risk of revision surgery in patients who have osteoporosis after total knee arthroplasty (TKA) is understudied. Our aim was to compare the 5-year cumulative risk of revision surgery after TKA in patients who have preoperative osteoporosis. METHODS A national administrative claims database was queried for patients undergoing primary TKA from 2010 to 2021. There were 418,054 patients included, and 41,760 (10%) had osteoporosis. The 5-year incidence of revision surgery was examined for all-causes, periprosthetic fracture (PPF), aseptic loosening, and periprosthetic joint infection (PJI). A multivariable analysis was conducted using Cox proportional hazards models. Hazards ratios (HRs) were reported with 95% confidence intervals (CIs). RESULTS The 5-year rate of all-cause revision surgery was higher for patients who had osteoporosis (HR 1.1, 95% CI: 1.0 to 1.2), however, the highest risk of revision surgery was seen for PPF (HR 1.8, 95% CI: 1.6 to 2.1). Patients who had osteoporosis also had elevated risk of revision surgery for PJI (HR 1.2, 95% CI: 1.1 to 1.3) and aseptic loosening (HR 1.2, 95% CI: 1.1 to 1.3). Osteoporosis was independently associated with PJI and aseptic loosening at a higher rate in obese patients. CONCLUSIONS In unadjusted survival analysis, those who had osteoporosis have a marginally lower risk of all-cause revision surgery. However, after controlling for age, sex and comorbidities, patients who had osteoporosis have a nearly 2-fold increased risk of 5-year revision for PPF after TKA, and mildly increased risk of revision for all causes, aseptic loosening, and PJI. Obesity may also modulate this association. Future studies should determine the extent to which treatment of osteoporosis modifies these postoperative outcomes.
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Affiliation(s)
- Andrew B Harris
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, Maryland
| | - Mark A Lantieri
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, Maryland
| | - Amil R Agarwal
- Department of Orthopaedic Surgery, The George Washington University School of Medicine and Health Sciences, Washington, District of Columbia; Department of Orthopaedic Surgery, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Gregory J Golladay
- Department of Orthopaedic Surgery, Virginia Commonwealth University School of Medicine, Richmond, Virginia
| | - Savyasachi C Thakkar
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, Maryland
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Heo K, Karzon A, Shah J, Ayeni A, Rodoni B, Erens GA, Guild GN, Premkumar A. Trends in Costs and Professional Reimbursements for Revision Total Hip and Knee Arthroplasty. J Arthroplasty 2024; 39:612-618.e1. [PMID: 37611680 DOI: 10.1016/j.arth.2023.08.062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 08/14/2023] [Accepted: 08/16/2023] [Indexed: 08/25/2023] Open
Abstract
BACKGROUND With increasing numbers of revision total hip and total knee arthroplasties (rTHAs and rTKAs), understanding trends in related out-of-pocket (OOP) costs, overall costs, and provider reimbursements is critical to improve patient access to care. METHODS A large database was used to identify 92,116 patients who underwent rTHA or rTKA between 2009 and 2018. The OOP costs associated with the surgery and related inpatient care were calculated as the sum of copayment, coinsurance, and deductible payments. Professional reimbursement was calculated as total payments to the principal physician. All monetary data were adjusted to 2018 dollars. Multivariate regressions evaluated the associations between costs and procedure type, insurance type, and region of service. RESULTS From 2009 to 2018, overall costs for rTHA significantly increased by 35.0% and overall costs for rTKA significantly increased by 32.3%. The OOP costs for rTHA had no significant changes, while OOP costs for rTKA increased by 20.1%, with patients on Medicare plans having the lowest OOP costs. Professional reimbursements, when measured as a percentage of overall costs, decreased significantly by 4.4% for rTHA and 4.0% for rTKA, with the lowest reimbursements from Medicare plans. CONCLUSION From 2009 to 2018, total costs related to rTHA and rTKA significantly increased. The OOP costs significantly increased for rTKA, and professional reimbursements for both rTHA and rTKA decreased relative to total costs. Overall, these trends may combine to create greater financial burden to patients and the healthcare system, as well as further limit patients' access to revision arthroplasty care.
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Affiliation(s)
- Kevin Heo
- Department of Orthopaedic Surgery, Emory University School of Medicine, Atlanta, Georgia
| | - Anthony Karzon
- Department of Orthopaedic Surgery, Emory University School of Medicine, Atlanta, Georgia
| | - Jason Shah
- Department of Orthopaedic Surgery, Emory University School of Medicine, Atlanta, Georgia
| | - Ayomide Ayeni
- Department of Orthopaedic Surgery, Emory University School of Medicine, Atlanta, Georgia
| | - Bridger Rodoni
- Department of Orthopaedic Surgery, Emory University School of Medicine, Atlanta, Georgia
| | - Greg A Erens
- Department of Orthopaedic Surgery, Emory University School of Medicine, Atlanta, Georgia
| | - George N Guild
- Department of Orthopaedic Surgery, Emory University School of Medicine, Atlanta, Georgia
| | - Ajay Premkumar
- Department of Orthopaedic Surgery, Emory University School of Medicine, Atlanta, Georgia
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Hörlesberger N, Smolle MA, Leitner L, Hauer G, Leithner A, Sadoghi P. Long-term clinical and radiological outcome of a cementless titanium-coated total knee arthroplasty system. Arch Orthop Trauma Surg 2024; 144:847-853. [PMID: 37831197 PMCID: PMC10822817 DOI: 10.1007/s00402-023-05091-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 09/25/2023] [Indexed: 10/14/2023]
Abstract
INTRODUCTION To ensure a high-quality standard, it is important to frequently evaluate different prostheses models to avoid prostheses with high failure rates. Thus, the aim of the study was to evaluate the long-term outcome of the uncemented titanium-coated total knee arthroplasty (TKA) system (Advanced Coated System (ACS) III, Implantcast, GERMANY). We hypothesized that the ACS III would have a similar performance as other cemented TKA systems. MATERIALS AND METHODS A total of 540 ACS III mobile-bearing knee joint prostheses were implanted in 495 patients. The visual analogue scale (VAS) score, Tegner activity score (TAS), knee society score (KSS), Western Ontario and McMaster (WOMAC) score, and the Short Form 12 (SF-12) score for the evaluation of quality of life (QoL) were taken after at least 9 years of follow-up. In addition, we measured range of motion (ROM) and assessed potential sex differences. In addition, the survival analysis was calculated at a median follow-up of 16.7 years. RESULTS At the final follow-up, 142 patients had died, and 38 had been lost to follow-up. The rate of revision-free implant survival at 16.7 years was 90.0% (95% CI 87.1-92.2%) and the rate of infection-free survival was 97.0% (IQR 95.2-98.2%). The reasons for revision surgery were aseptic loosening (32.9%), followed by infection (27.1%), inlay exchange (15.9%), and periprosthetic fractures (5.7%). At the clinical follow-up visit, the mean VAS score was 1.9 ± 1.9, the median TAS was 3 (IQR 2-4), and the mean KSS for pain and function were 83.5 ± 15.3 and 67.5 ± 25.2, respectively. The mean WOMAC score was 81.1 ± 14.9, and the median SF-12 scores for physical and mental health were 36.9 (IQR 29.8-45.1) and 55.8 (IQR 46.2-61.0), respectively. The mean knee flexion was 102.0° ± 15.4°. Male patients had better clinical outcome scores than female patients [SF-12 mental health score, p = 0.037; SF-12 physical health score, p = 0.032; KSS pain score (p < 0.001), and KSS functional score (p < 0.001)]. CONCLUSION The ACS III TKA system is a suitable option for the treatment of end-stage osteoarthritis of the knee joint because of its adequate long-term survival. Our findings are in line with published data on similar TKA systems that have shown favourable clinical scores in males. LEVEL OF EVIDENCE Level III-Retrospective cohort study.
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Affiliation(s)
- Nina Hörlesberger
- Department of Orthopaedics and Trauma, Medical University of Graz, Auenbruggerplatz 5, 8036, Graz, Austria
| | - Maria Anna Smolle
- Department of Orthopaedics and Trauma, Medical University of Graz, Auenbruggerplatz 5, 8036, Graz, Austria.
| | - Lukas Leitner
- Department of Orthopaedics and Trauma, Medical University of Graz, Auenbruggerplatz 5, 8036, Graz, Austria
| | - Georg Hauer
- Department of Orthopaedics and Trauma, Medical University of Graz, Auenbruggerplatz 5, 8036, Graz, Austria
| | - Andreas Leithner
- Department of Orthopaedics and Trauma, Medical University of Graz, Auenbruggerplatz 5, 8036, Graz, Austria
| | - Patrick Sadoghi
- Department of Orthopaedics and Trauma, Medical University of Graz, Auenbruggerplatz 5, 8036, Graz, Austria
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Jella TK, Manyak GA, Cwalina TB, Roth AL, Mesko NW, Kamath AF. Declining Geographic Access to High-Volume Revision Total Hip Arthroplasty Surgeons: A National Medicare Analysis. J Arthroplasty 2023; 38:S103-S110. [PMID: 36634884 DOI: 10.1016/j.arth.2023.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 12/22/2022] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND While trends in the economics of revision THA (revTHA) procedures have been well-described from the standpoint of both hospitals and surgeons, their population-level effects of these trends on patient access are not well-understood. METHODS The Medicare fee-for-service provider utilization and payment public use files were used to extract data for primary and revTHA for beneficiaries between 2013 and 2019. Primary and revTHA procedures were identified using the Healthcare Common Procedure Coding System code; 27130 for primaries and 27132, 27134, 27137, or 27138 for revisions. Geospatial analyses were performed by aggregating surgeon practice locations at the level of individual counties, hospital service areas, and hospital referral regions. RESULTS The number of high-volume primary THA surgeons within the Medicare population increased by 17.6% over the study period (3,838 in 2013 to 4,515 in 2019). Conversely, the number of high-volume revTHA surgeons decreased by 36.1% (178 in 2013 to 129 in 2019). Linear regression revealed a significant increase and decrease in high-volume primary (β = 109.07, P ≤ .001) and revision (β = -13.04, P = .011) THA surgeons, respectively. Over the study period, the number of counties with at least 1 high-volume primary THA surgeon increased by 6.1% (1,194 to 1,267), while the number of counties with at least 1 high-volume revTHA surgeon decreased by 30.2% (159 to 111). CONCLUSION The present findings of declining geographic access may represent a consequence of shifting economic incentives and declining reimbursements for the care of complicated revTHA patients.
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Affiliation(s)
- Tarun K Jella
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Grigory A Manyak
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Thomas B Cwalina
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Alexander L Roth
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Nathan W Mesko
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Atul F Kamath
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
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Sacher SE, Neri JP, Gao MA, Argentieri EC, Potter HG, Koch KM, Koff MF. MAVRIC based T2 mapping assessment of infrapatellar fat pad scarring in patients with total knee arthroplasty. J Orthop Res 2023; 41:1299-1309. [PMID: 36262013 PMCID: PMC10113607 DOI: 10.1002/jor.25472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 09/06/2022] [Accepted: 10/18/2022] [Indexed: 02/04/2023]
Abstract
The infrapatellar fat pad (IPFP) has been implicated as a source of postoperative knee pain. Imaging the IPFP is challenging in patients with total knee arthroplasty (TKA) due to metallic susceptibility artifact. Multi-Acquisition Variable-Resonance Image Combination (MAVRIC)-based T2 Mapping has been developed to mitigate this artifact and can generate quantitative T2 data. Objectives of this study were to (1) measure T2 values of the IPFP in patients with TKAs using a MAVRIC based T2 mapping technique and (2) determine if IPFP T2 values are related to the degree of fat pad scarring or clinical magnetic resonance imaging (MRI) findings. Twenty-eight subjects (10 males, 18 females, Age: 66 + 7.2 years [Mean ± standard deviations]) undergoing clinical MRIs were sequentially recruited. Morphological imaging and quantitative T2 mapping sequences were performed on a clinical 1.5 T scanner. The morphologic images were graded for the presence and severity of fat pad scarring and clinical outcomes. T2 values were calculated in the total fat pad volume, a normal regions of interest (ROI), and an abnormal ROI. T2 values were shortened in the total IPFP volume (p = 0.001) and within abnormal regions (p = 0.003) in subjects with more severe IPFP scarring. The difference between T2 values in normal-abnormal regions was greater in subjects with severe versus no scarring (+1426.1%, p = 0.008). T2 values were elevated in patients with MRI findings of osteolysis (+32.3%, p = 0.02). These findings indicate that MAVRIC-based T2 Mapping may be used as a quantitative biomarker of postoperative IPFP scarring in individuals following TKA.
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Affiliation(s)
- Sara E. Sacher
- Hospital for Special Surgery, 535 East 70th St, New York, NY 10021
| | - John P. Neri
- Hospital for Special Surgery, 535 East 70th St, New York, NY 10021
| | - Madeleine A. Gao
- Hospital for Special Surgery, 535 East 70th St, New York, NY 10021
| | | | - Hollis G. Potter
- Hospital for Special Surgery, 535 East 70th St, New York, NY 10021
| | | | - Matthew F. Koff
- Hospital for Special Surgery, 535 East 70th St, New York, NY 10021
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Correlation of Relative Value Units With Surgical Complexity and Physician Workload: A Contemporary Nationwide Analysis of Orthopaedic Procedures. J Am Acad Orthop Surg 2023; 31:413-420. [PMID: 36749881 DOI: 10.5435/jaaos-d-22-00866] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 12/31/2022] [Indexed: 02/09/2023] Open
Abstract
INTRODUCTION Although previous studies have demonstrated inconsistencies between surgeon work and reimbursement, no previous study has calculated expected relative value units (RVUs) based on procedure-specific variables. Our study aimed to evaluate how measures of physician workload and surgical complexity correlate with the work RVUs (wRVUs) assigned to orthopaedic procedures and compare our predicted wRVUs with actual wRVUs. METHODS The National Surgical Quality Improvement Program was used to identify orthopaedic surgeries with the highest procedural volume in 2019. For each Current Procedural Terminology (CPT) code, variables related to surgical complexity and postoperative management were retrieved. A multivariable linear regression was conducted, and R2 values were calculated. RESULTS A total of 229,792 cases from the top 20 CPT codes by frequency in 2019 were identified. Base RVU values ranged from 7.03 mRVUs for arthroscopic meniscectomy to 30.28 mRVUs for revision total hip arthroplasty. A total of 15 (75%) of the projected mRVUs were lower than the actual mRVU of the procedure. For the 5 (25%) procedures with mRVU projections higher than actual values, the largest differences were seen for CPT codes 29,888 (arthroscopic anterior cruciate ligament [ACL] repair; difference: 7.81), 22,630 (posterior arthrodesis of the lumbar interbody; difference: 7.75), and 27,487 (revision total knee arthroplasty; difference: 4.04). CONCLUSION Our analysis demonstrates that current orthopaedic wRVUs do not appropriately compensate for objective measures of overall complexity as it relates to each procedure. Significant undercompensation in projected RVUs was noted for several high-volume orthopaedic procedures including arthroscopic ACL repair and revision total knee arthroplasty.
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11
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Fisher CR, Patel R. Profiling the Immune Response to Periprosthetic Joint Infection and Non-Infectious Arthroplasty Failure. Antibiotics (Basel) 2023; 12:antibiotics12020296. [PMID: 36830206 PMCID: PMC9951934 DOI: 10.3390/antibiotics12020296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/20/2023] [Accepted: 01/29/2023] [Indexed: 02/04/2023] Open
Abstract
Arthroplasty failure is a major complication of joint replacement surgery. It can be caused by periprosthetic joint infection (PJI) or non-infectious etiologies, and often requires surgical intervention and (in select scenarios) resection and reimplantation of implanted devices. Fast and accurate diagnosis of PJI and non-infectious arthroplasty failure (NIAF) is critical to direct medical and surgical treatment; differentiation of PJI from NIAF may, however, be unclear in some cases. Traditional culture, nucleic acid amplification tests, metagenomic, and metatranscriptomic techniques for microbial detection have had success in differentiating the two entities, although microbiologically negative apparent PJI remains a challenge. Single host biomarkers or, alternatively, more advanced immune response profiling-based approaches may be applied to differentiate PJI from NIAF, overcoming limitations of microbial-based detection methods and possibly, especially with newer approaches, augmenting them. In this review, current approaches to arthroplasty failure diagnosis are briefly overviewed, followed by a review of host-based approaches for differentiation of PJI from NIAF, including exciting futuristic combinational multi-omics methodologies that may both detect pathogens and assess biological responses, illuminating causes of arthroplasty failure.
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Affiliation(s)
- Cody R. Fisher
- Mayo Clinic Graduate School of Biomedical Sciences, Department of Immunology, Mayo Clinic, Rochester, MN 55905, USA
- Division of Clinical Microbiology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA
| | - Robin Patel
- Division of Clinical Microbiology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA
- Division of Public Health, Infectious Diseases, and Occupational Medicine, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
- Correspondence:
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12
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Balato G, Ascione T, Festa E, De Vecchi E, Pagliano P, Pellegrini A, Pandolfo G, Siciliano R, Logoluso N. The combined evaluation of fibrinogen and D-dimer levels are a helpful tool to exclude periprosthetic knee infection. J Orthop Res 2023. [PMID: 36606419 DOI: 10.1002/jor.25515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 12/08/2022] [Accepted: 01/04/2023] [Indexed: 01/07/2023]
Abstract
This retrospective study was undertaken to (i) define the most appropriate thresholds for serum d-dimer and fibrinogen for differentiating aseptic failure from periprosthetic joint infection (PJI) and (ii) evaluate the predictive value of our d-dimer and fibrinogen threshold compared to previously proposed thresholds. This observational cohort study included consecutive patients who had undergone total knee arthroplasty (TKA) revision between January 2019 and December 2020. International Consensus Meeting diagnostic criteria were used to identify patients affected by the prosthetic infection. Receiver operating characteristic curve analyses assessed the predictive value of the parameters, and the areas under the curves were evaluated. We included 125 patients with a median age of 69 years (53-82) affected by painful TKA. Fifty-seven patients (47%) had PJI. Patients with PJI had higher median d-dimer, fibrinogen, ESR, and CRP when compared to patients believed to be free of PJI. The best threshold values for d-dimer and fibrinogen were 1063 ng/ml (sensitivity 0.72, specificity 0.74) and 420 mg/dl (sensitivity 0.67 and specificity 0.82), respectively. A d-dimer level >1063 ng/ml combined with a fibrinogen level >420 mg/dl had a sensitivity of 0.52, and a specificity of 0.90. We found that an increased d-dimer beyond 1063 ng/ml showed a better predictive value than the previously proposed threshold. The combined determination of d-dimer and fibrinogen displayed high specificity and should be considered an excellent tool to rule out an infection. The accuracy of the proposed cutoffs is more effective than previously reported.
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Affiliation(s)
- Giovanni Balato
- Department of Public Health, Section of Orthopedic Surgery, Federico II University, Naples, Italy
| | - Tiziana Ascione
- Service of Infectious Diseases, Cardarelli Hospital, Naples, Italy.,Department of Infectious Diseases, D. Cotugno Hospital, AORN dei Colli, Naples, Italy
| | - Enrico Festa
- Department of Public Health, Section of Orthopedic Surgery, Federico II University, Naples, Italy
| | - Elena De Vecchi
- Laboratory of Clinical Chemistry and Microbiology, IRCCS Istituto Ortopedico Galeazzi, Milan, Italy
| | - Pasquale Pagliano
- Department of Medicine and Surgery, Unit of Infectious Diseases, University of Salerno, Baronissi, Italy
| | - Antonio Pellegrini
- IRCCS Istituto Ortopedico Galeazzi (Centro di Chirurgia Ricostruttiva e delle Infezioni Osteoarticolari - CRIO Unit), Milano, Italy
| | - Giuseppe Pandolfo
- Department of Industrial Engineering, "Federico II" University, Naples, Italy
| | - Roberta Siciliano
- Department of Electrical Engineering and Information Technologies, Federico II University, Naples, Italy
| | - Nicola Logoluso
- IRCCS Istituto Ortopedico Galeazzi (Centro di Chirurgia Ricostruttiva e delle Infezioni Osteoarticolari - CRIO Unit), Milano, Italy
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13
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Xu T, Wu KL, Jie K. Comprehensive meta-analysis of antibiotic-impregnated bone cement versus plain bone cement in primary total knee arthroplasty for preventing periprosthetic joint infection. Chin J Traumatol 2022; 25:325-330. [PMID: 35717367 PMCID: PMC9751532 DOI: 10.1016/j.cjtee.2022.06.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 03/28/2022] [Accepted: 05/21/2022] [Indexed: 02/04/2023] Open
Abstract
PURPOSE Antibiotic-loaded bone cement (ALBC) was usually used to prevent periprosthetic joint infection (PJI) in primary total knee arthroplasty (PTKA), but whether to use ALBC or plain bone cement in PTKA remains unclear. We aimed to compare the occurrence rate of PJI using two different cements, and to investigate the efficacy of different antibiotic types and doses administered in preventing surgical site infection (SSI) with ALBC. METHODS The availability of ALBC for preventing PJI was evaluated by using a systematic review and meta-analysis referring to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Existing articles until December 2021 involving PTKA patients with both ALBC and plain bone cement cohorts were scanned by searching "total knee arthroplasty", "antibiotic-loaded cement", "antibiotic prophylaxis", "antibiotic-impregnated cement" and "antibiotic-laden cement" in the database of PubMed/MEDLINE, Embase, Web of Science and the Cochrane Library. Subgroup analysis included the effectiveness of different antibiotic types and doses in preventing SSI with ALBC. The modified Jadad scale was employed to score the qualities of included articles. RESULTS Eleven quantitative studies were enrolled, including 34,159 knees undergoing PTKA. The meta-analysis results demonstrated that the use of prophylactic ALBC could significantly reduce the prevalence of deep incisional SSI after PTKA, whereas there was no significant reduction in the rate of superficial incisional SSI. Moreover, gentamicin-loaded cement was effective in preventing deep incisional SSI, and the use of high-dose ALBC significantly reduced the rate of deep incisional SSI after PTKA. Besides, no significant adverse reactions and complications were stated during the use of ALBC in PTKA. CONCLUSION The preventive application of ALBC during PTKA could reduce the rates of deep PJI. Furthermore, bone cement containing gentamicin and high-dose ALBC could even better prevent deep infection after PTKA. However, the existing related articles are mostly single-center and retrospective studies, and further high-quality ones are needed for confirmation.
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Affiliation(s)
- Ting Xu
- Foshan Hospital of Traditional Chinese Medicine, Foshan, 528000, Guangdong Province, China
| | - Ke-Liang Wu
- Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, 518000, Guangdong Province, China
| | - Ke Jie
- Foshan Hospital of Traditional Chinese Medicine, Foshan, 528000, Guangdong Province, China,Corresponding author.
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Rizk AA, Jella TK, Cwalina TB, Pumo TJ, Erossy MP, Kamath AF. Are Trends in Revision Total Joint Arthroplasty Sustainable? Declining Inflation-Adjusted Medicare Reimbursement for Hospitalizations. J Arthroplasty 2022:S0883-5403(22)00964-0. [PMID: 36280161 DOI: 10.1016/j.arth.2022.10.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 10/16/2022] [Accepted: 10/17/2022] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND While the burden of revision total joint arthroplasty (TJA) procedures increases within the United States, it is unclear whether health care resource allocation for these complex cases has kept pace. This study examined the trends in hospital-level reimbursements for revision TJA hospitalizations. METHODS The Centers for Medicare and Medicaid Services (CMS) inpatient utilization and payment public use files from 2014 to 2019 were queried for diagnostic-related groups (DRGs) for revision TJA: DRG 467 (revision of hip or knee arthroplasty with complication or comorbidity [CC]) and DRG 468 (revision of hip or knee arthroplasty without CC or major CC). From 2014 to 2019, 170,808 revision TJA hospitalizations were billed to Medicare, and revision TJA procedures increased by 3,121 (10.7%). After adjusting to 2019 US dollars with the consumer price index, a multiple linear mixed-model regression analysis was performed. Analysis of covariance compared regressions from 2014 to 2019 for mean-adjusted Medicare payment and mean- adjusted charge were submitted for these DRGs. RESULTS Mean-adjusted average Medicare payment for DRG 467 decreased by $804.37 (-3.5%) from 2014 to 2019, whereas, that for DRG 468 decreased by $647.33 (-3.6%). The average inflation-adjusted Medicare payment for DRG 467 decreased at a greater rate during the study period, compared to that for DRG 468 (P = .02). CONCLUSION The decline in reimbursement for DRGs 467 and 468 reveals decreasing incentives for revision TJA hospitalizations. Further research should assess the efficacy of current Medicare payment algorithms and identify modifications which may provide for fair hospital level reimbursements.
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Affiliation(s)
- Adam A Rizk
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Tarun K Jella
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Thomas B Cwalina
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Thomas J Pumo
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Michael P Erossy
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Atul F Kamath
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
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15
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Small I, Meghpara M, Stein J, Goh GS, Banerjee S, Courtney PM. Intermediate-Term Survivorship of Metaphyseal Cones and Sleeves in Revision Total Knee Arthroplasty. J Arthroplasty 2022; 37:1839-1843. [PMID: 35398228 DOI: 10.1016/j.arth.2022.03.085] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 03/22/2022] [Accepted: 03/31/2022] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Both cones or sleeves have been developed to address metaphyseal bone loss in revision total knee arthroplasty (TKA), but few studies have directly compared the outcomes. The purpose of this study was to compare the survivorship and aseptic revision rates between metaphyseal cones and sleeves at intermediate follow-up. METHODS We reviewed a consecutive series of 1,172 revision TKA patients between 2009 and 2018 with a minimum two-year follow-up on all patients. We compared demographics, surgical indication, stem fixation, constraint, rates of rerevision, and Short-Form-12 scores between patients with cones and sleeves. A multivariate analysis was performed to identify the effect of cones and sleeves on aseptic rerevision. Kaplan-Meier curves were generated to compare aseptic survivorship of cones and sleeves. RESULTS There were 194 tibial cones (17%), 107 tibial sleeves (9%), 31 femoral cones (3%), and 135 femoral sleeves (12%) with a mean follow-up of 6.5 years (range: 2-12 years). There was no difference in demographics, indication, stem fixation, or constraint (P > .05). Although overall aseptic failure rates may be lower for tibial sleeves, there were no significant differences in survivorship over a one-year, two-year, and five-year follow-up when both tibial and femoral sleeves were directly compared to cones. CONCLUSION Both tibial and femoral sleeves and cones perform well at an intermediate-term follow-up. Further investigation of these two are required to better understand their survivorship relative to each other.
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Affiliation(s)
- Ilan Small
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Michael Meghpara
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Jonah Stein
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Graham S Goh
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Samik Banerjee
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania
| | - P Maxwell Courtney
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania
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Klemt C, Tirumala V, Barghi A, Cohen-Levy WB, Robinson MG, Kwon YM. Artificial intelligence algorithms accurately predict prolonged length of stay following revision total knee arthroplasty. Knee Surg Sports Traumatol Arthrosc 2022; 30:2556-2564. [PMID: 35099600 DOI: 10.1007/s00167-022-06894-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 01/12/2022] [Indexed: 11/25/2022]
Abstract
PURPOSE Although the average length of hospital stay following revision total knee arthroplasty (TKA) has decreased over recent years due to improved perioperative and intraoperative techniques and planning, prolonged length of stay (LOS) continues to be a substantial driver of hospital costs. The purpose of this study was to develop and validate artificial intelligence algorithms for the prediction of prolonged length of stay for patients following revision TKA. METHODS A total of 2512 consecutive patients who underwent revision TKA were evaluated. Those patients with a length of stay greater than 75th percentile for all length of stays were defined as patients with prolonged LOS. Three artificial intelligence algorithms were developed to predict prolonged LOS following revision TKA and these models were assessed by discrimination, calibration and decision curve analysis. RESULTS The strongest predictors for prolonged length of stay following revision TKA were age (> 75 years; p < 0.001), Charlson Comorbidity Index (> 6; p < 0.001) and body mass index (> 35 kg/m2; p < 0.001). The three artificial intelligence algorithms all achieved excellent performance across discrimination (AUC > 0.84) and decision curve analysis (p < 0.01). CONCLUSION The study findings demonstrate excellent performance on discrimination, calibration and decision curve analysis for all three candidate algorithms. This highlights the potential of these artificial intelligence algorithms to assist in the preoperative identification of patients with an increased risk of prolonged LOS following revision TKA, which may aid in strategic discharge planning. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- Christian Klemt
- Bioengineering Laboratory, Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA, 02114, USA
| | - Venkatsaiakhil Tirumala
- Bioengineering Laboratory, Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA, 02114, USA
| | - Ameen Barghi
- Bioengineering Laboratory, Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA, 02114, USA
| | - Wayne Brian Cohen-Levy
- Bioengineering Laboratory, Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA, 02114, USA
| | - Matthew Gerald Robinson
- Bioengineering Laboratory, Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA, 02114, USA
| | - Young-Min Kwon
- Bioengineering Laboratory, Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, MA, 02114, USA.
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17
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Auran RL, Ashby SL, Hitt KD, Jacofsky DJ. Preoperative Activity Level an Indicator of Postoperative Functional Outcomes with a Contemporary Revision Total Knee System. J Knee Surg 2022. [PMID: 35817053 DOI: 10.1055/s-0042-1749606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
As the population requiring revision total knee arthroplasty (rTKA) grows, varying preoperative conditions may need to be considered when attempting to predict postoperative outcomes. Considering preoperative activity levels may help manage the expectations of patients. The purpose of this study was to analyze the outcomes of low- and high-activity subgroups of patients receiving a contemporary rTKA. One hundred and eighty-one rTKA patients enrolled in a prospective multicenter study were evaluated over a minimum follow-up of 2 years postoperatively. Patients were divided into two groups based on the preoperative activity level using the Lower Extremity Activity Scale. Patients scoring between 1 and 7 were classified as "Low Activity" (LA; N = 105) and patients scoring 8 to 18 were classified as "High Activity" (HA; N = 76). Clinical outcomes were evaluated, with an additional quality-of-life analysis completed utilizing SF-6D (6-dimension short form) scores obtained through a method described by Brazier et al and analyzed for effect size. There were no significant differences in age or body mass index between the groups. Postoperative improvement in both groups were similar in the Knee Society score (KSS), but the LA group showed larger increases in the KSS functional assessment at 6 months (16.2) and 2 years (34.8). There was a statistically significant effect (0.96, p = 0.0006) seen in the LA group at 1 year, in conjunction with a higher SF-6D outcome. The current study population displayed significant improvement in functional patient outcomes following rTKA regardless of preoperative activity level and function. Patients with lower preoperative activity levels demonstrated greater cumulative functional and quality-of-life improvements. This suggests that a lower preoperative activity level may be related to a poorly functioning knee and that rTKA has the potential to improve overall activity levels and function. Low preoperative function should not disqualify patients for rTKA.
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Affiliation(s)
- Richard L Auran
- Department of Orthopaedic Surgery, University of Arizona College of Medicine, Phoenix, Arizona
| | - Samuel L Ashby
- Division of Orthopedics, Ascension Via Christi, Wichita, Kansas
| | - Kirby D Hitt
- Division of Orthopaedics, Baylor Scott & White Roney Bone and Joint Institute, Temple, Texas
| | - David J Jacofsky
- Division of Orthopaedic Surgery, The CORE Insitute, Phoenix, Arizona
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18
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Tegethoff JD, Walker-Santiago R, Ralston WM, Keeney JA. Isolated Liner Revision for Total Knee Arthroplasty Instability: A Road That Should Remain Less Taken. J Knee Surg 2022; 35:904-908. [PMID: 33231283 DOI: 10.1055/s-0040-1721091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Isolated polyethylene liner exchange (IPLE) is infrequently selected as a treatment approach for patients with primary total knee arthroplasty (TKA) prosthetic joint instability. Potential advantages of less immediate surgical morbidity, faster recovery, and lower procedural cost need to be measured against reoperation and re-revision risk. Few published studies have directly compared IPLE with combined tibial and femoral component revision to treat patients with primary TKA instability. After obtaining institutional review board (IRB) approval, we performed a retrospective comparison of 20 patients treated with IPLE and 126 patients treated with tibial and femoral component revisions at a single institution between 2011 and 2018. Patient demographic characteristics, medical comorbidities, time to initial revision TKA, and reoperation (90 days, <2 years, and >2 years) were assessed using paired Student's t-test or Fisher's exact test with a p-value <0.01 used to determine significance. Patients undergoing IPLE were more likely to undergo reoperation (60.0 vs. 17.5%, p = 0.001), component revision surgery (45.0 vs. 8.7%, p = 0.002), and component revision within 2 years (30.0 vs. 1.6%, p < 0.0001). Differences in 90-day reoperation (p = 0.14) and revision >2 years (p = 0.19) were not significant. Reoperation for instability (30.0 vs. 4.0%, p < 0.001) and infection (20.0 vs. 1.6%, p < 0.01) were both higher in the IPLE group. IPLE does not provide consistent benefits for patients undergoing TKA revision for instability. Considerations for lower immediate postoperative morbidity and cost need to be carefully measured against long-term consequences of reoperation, delayed component revision, and increased long-term costs of multiple surgical procedures. This is a level III, case-control study.
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Affiliation(s)
- Jason D Tegethoff
- Department of Orthopaedic Surgery, University of Missouri, Columbia, Missouri
| | | | - William M Ralston
- Department of Orthopaedic Surgery, University of Missouri, Columbia, Missouri
| | - James A Keeney
- Department of Orthopaedic Surgery, University of Missouri, Columbia, Missouri
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Progress in osteoarthritis research by the National Natural Science Foundation of China. Bone Res 2022; 10:41. [PMID: 35610209 PMCID: PMC9130253 DOI: 10.1038/s41413-022-00207-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 12/24/2021] [Accepted: 02/17/2022] [Indexed: 01/10/2023] Open
Abstract
Osteoarthritis (OA) in China is gradually becoming an important scientific research area that has had a significant impact on research and development (R&D) activities in the OA field worldwide. This article summarizes the R&D progress related to OA in China in recent years. The National Natural Science Foundation of China (NSFC) is a national funding institution for basic research and plays a critical role in promoting and supporting Chinese scholars' R&D activities. We collected and analyzed information on NSFC funding in the field of OA from 2010 to 2019, including the amount, the level and the program categories of the funded projects. The data fully demonstrate the important and positive role of the NSFC in supporting free exploration, cultivating research teams and young talent, and boosting OA R&D. In this article, we outline and discuss hot topics in focused areas, key advances in this field and the prospects for progress in OA research in China.
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20
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Brozovich A, Clyburn T, Park K, Harper KD, Sullivan T, Incavo S, Taraballi F. Evaluation of local tissue peri-implant reaction in total knee arthroplasty failure cases. Ther Adv Musculoskelet Dis 2022; 14:1759720X221092263. [PMID: 35521051 PMCID: PMC9067040 DOI: 10.1177/1759720x221092263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 02/28/2022] [Indexed: 11/16/2022] Open
Abstract
Introduction: Implant-related hypersensitivity is emerging as a causative factor as a potential source of total knee arthroplasty (TKA) failure. Mechanistically, this type IV hypersensitivity reaction (T4HR) is mediated by effector T-cells, macrophages, and leukocytes that infiltrate to the site of implant and react to metal exposure and induce inflammatory tissue damage. Methods: A case–control study was performed where cortical bone was taken at the time of revision surgery for all patients operated on for primary TKA in which metal allergy was suspected and for revision TKA cases done for presumed metal allergy. Cytof was used to determine the cell density of inflammatory cells, specifically Th1, Th2, M1, and M2 cells. Results: Comparing the mean cell density of primary versus revision TKA, revision TKA patients had significantly higher number of Th2 cells compared with Th1 cells ( p = 0.0043). Among revision cases, there were significantly more M1 versus M2 macrophages ( p = 0.034) within a patient. When comparing mean cell density of M1 versus M2 macrophages, there was a significant difference in both primary and revision TKA surgeries ( p = 0.0041 primary, p < 0.001 revision). Among revision patients who had a predominance of Th2 cells, four (44%) of nine patients had a negative LTT/patch test. Conclusion: These data support metal hypersensitivity, mediated by a T4HR, for some cases of TKA failure. Current methods to screen patients for metal hypersensitivity prior to primary TKA have been inclusive. This study demonstrates the need for a more sensitive screening test from specimens in the knee joint, to more accurately identify patients who will exhibit a T4HR to metal.
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Affiliation(s)
- Ava Brozovich
- Texas A&M College of Medicine, Bryan, TX, USA
- Center for Musculoskeletal Regeneration, Houston Methodist Research Institute, Houston, TX, USA
- Orthopedics and Sports Medicine, Houston Methodist Hospital, Houston, TX, USA
| | - Terry Clyburn
- Orthopedics and Sports Medicine, Houston Methodist Hospital, Houston, TX, USA
| | - Kevin Park
- Orthopedics and Sports Medicine, Houston Methodist Hospital, Houston, TX, USA
| | - Katharine D. Harper
- Department of Orthopedic Surgery, Washington DC Veterans Affairs Medical Center, Washington, DC, USA
| | - Thomas Sullivan
- Orthopedics and Sports Medicine, Houston Methodist Hospital, Houston, TX, USA
| | - Stephen Incavo
- Orthopedics and Sports Medicine, Houston Methodist Hospital, Houston, TX, USA
| | - Francesca Taraballi
- Center for Musculoskeletal Regeneration, Houston Methodist Research Institute, R10-123 6670 Bertner Avenue, Houston, TX 77030, USA
- Orthopedics and Sports Medicine, Houston Methodist Hospital, Houston, TX, USA
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21
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Mell SP, Wimmer MA, Jacobs JJ, Lundberg HJ. Optimal surgical component alignment minimizes TKR wear - An in silico study with nine alignment parameters. J Mech Behav Biomed Mater 2022; 125:104939. [PMID: 34740015 PMCID: PMC8710043 DOI: 10.1016/j.jmbbm.2021.104939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/18/2021] [Accepted: 10/25/2021] [Indexed: 01/03/2023]
Abstract
Currently, preclinical mechanical wear testing of total knee replacements (TKRs) is done using ideally aligned components using standardized TKR level walking under either force or displacement-control regimes. To understand the influence of implant alignment and testing control regime, we studied the effect of nine component alignment parameters on TKR volumetric wear in silico. We used a computational framework combining Latin Hypercube sampling design of experiments, finite element analysis, and a numerical model of polyethylene wear, to create a predictive model of how component alignment affects wear rate for each control regime. Nine component alignment parameters were investigated, five femoral variables and four tibial variables. To investigate perturbations of the nine implant alignment variables, two separate 300-point designs were executed, one for each control regime. The results were then used to generate surrogate statistical models using stepwise multiple linear regression. Wear at the neutral position was 4.5mm3/million cycle and 8.6mm3/million cycle for displacement and force-control, respectively. Stepwise multiple linear regression surrogate models were highly significant for each control regime, but force-control generated a stronger predictive model, with a higher R2, more included terms, and a lower RMSE. Both models predicted transverse plane rotational mismatch can lead to large changes in predicted wear; a transverse plane alignment mismatch of 15° can elicit a change in wear of up to 5mm3/million cycle, almost double that of neutral alignment. Therefore, transverse plane alignment is particularly important when considering failure of the implant due to wear.
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22
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Scuderi GR. Dealing with the Challenge of Revision Total Knee Arthroplasty. J Knee Surg 2021; 34:1379-1381. [PMID: 34719012 DOI: 10.1055/s-0041-1735161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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23
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Khow YZ, Liow MHL, Goh GS, Chen JY, Lo NN, Yeo SJ. The oxford knee score minimal clinically important difference for revision total knee arthroplasty. Knee 2021; 32:211-217. [PMID: 34509827 DOI: 10.1016/j.knee.2021.08.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 07/21/2021] [Accepted: 08/24/2021] [Indexed: 02/02/2023]
Abstract
BACKGROUND Minimal clinically important difference (MCID) is crucial for interpreting meaningful improvements in patient-reported outcome measures (PROMs). No previous study has evaluated the MCID for the Oxford Knee Score (OKS) in revision total knee arthroplasty (TKA). This study aimed to propose the OKS MCID for revision TKA. METHODS Prospectively collected data from 191 patients who underwent revision TKA at a single institution was analysed. Clinical assessment was performed preoperatively and at 2 years using OKS and Short-Form 36 Physical Component Score (SF-36 PCS). MCID was evaluated with a three-pronged methodology, using (1) anchor-based method with linear regression, (2) anchor-based method with receiver operating characteristic (ROC) and area under curve (AUC), (3) distribution-based method with standard deviation (SD). The anchors used were improvement in SF-36 PCS ≥ 12, patient satisfaction, and implant survivorship following revision TKA. RESULTS The MCID determined by anchor-based linear regression method using improvements in SF-36 PCS was 4.9 points. The MCID determined by anchor-based ROC was 10.5 points for satisfaction (AUC = 74.8%) and 13.5 points for implant survivorship (AUC = 73.7%). The MCID determined by distribution-based method of 0.5 SD was 4.7. CONCLUSION The proposed MCID for OKS following revision TKA is 4.9 points. Patients who achieve an improvement in OKS of at least 10.5-13.5 points by 2 years are likely to be satisfied with their surgery and not require a subsequent re-revision TKA. Patients undergoing revision TKA should aim for an improvement in OKS of at least 10.5-13.5 points as a target score.
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Affiliation(s)
- Yong Zhi Khow
- Department of Orthopaedic Surgery, Singapore General Hospital, Singapore
| | | | - Graham S Goh
- Department of Orthopaedic Surgery, Singapore General Hospital, Singapore
| | | | - Ngai Nung Lo
- Department of Orthopaedic Surgery, Singapore General Hospital, Singapore
| | - Seng Jin Yeo
- Department of Orthopaedic Surgery, Singapore General Hospital, Singapore
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Okafor C, Hodgkinson B, Nghiem S, Vertullo C, Byrnes J. Cost of septic and aseptic revision total knee arthroplasty: a systematic review. BMC Musculoskelet Disord 2021; 22:706. [PMID: 34407779 PMCID: PMC8371784 DOI: 10.1186/s12891-021-04597-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 08/04/2021] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND The increasing incidence of primary total knee arthroplasty (TKA) has led to an increase in both the incidence and the cost burden of revision TKA procedures. This study aimed to review the literature on the cost of revision TKA for septic and aseptic causes and to identify the major cost components contributing to the cost burden. METHODS We searched MEDLINE (OvidSp), Embase, Web of Science, Cochrane Library, EconLit, and Google Scholar to identify relevant studies. Selection, data extraction and assessment of the risk of bias and cost transparency within the studies were conducted by two independent reviewers, after which the cost data were analysed narratively for 1- or 2-stage septic revision without re-revision; 2-stage septic revision with re-revision; and aseptic revision with and without re-revision, respectively. The major cost components identified in the respective studies were also reported. RESULTS The direct medical cost from the healthcare provider perspective for high-income countries for 2-stage septic revision with re-revision ranged from US$66,629 to US$81,938, which can be about 2.5 times the cost of 1- or 2-stage septic revision without re-revision, (range: US$24,027 - US$38,109), which can be about double the cost of aseptic revision without re-revision (range: US$13,910 - US$29,213). The major cost components were the perioperative cost (33%), prosthesis cost (28%), and hospital ward stay cost (22%). CONCLUSIONS Septic TKA revision with re-revision for periprosthetic joint infection (PJI) increases the cost burden of revision TKA by 4 times when compared to aseptic single-stage revision and by 2.5 times when compared to septic TKA revision that does not undergo re-revision. Cost reductions can be achieved by reducing the number of primary TKA that develop PJI, avoidance of re-revisions for PJI, and reduction in the length of stay after revision. TRIAL REGISTRATION PROSPERO; CRD42020171988 .
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Affiliation(s)
- Charles Okafor
- Centre for Applied Health Economics, School of Medicine and Dentistry, Griffith University, 170 Kessels Road, Nathan, Queensland, 4111, Australia.
- Menzies Health Institute, Griffith University, Gold Coast, Queensland, Australia.
| | - Brent Hodgkinson
- Centre for Applied Health Economics, School of Medicine and Dentistry, Griffith University, 170 Kessels Road, Nathan, Queensland, 4111, Australia
- Menzies Health Institute, Griffith University, Gold Coast, Queensland, Australia
| | - Son Nghiem
- Centre for Applied Health Economics, School of Medicine and Dentistry, Griffith University, 170 Kessels Road, Nathan, Queensland, 4111, Australia
- Menzies Health Institute, Griffith University, Gold Coast, Queensland, Australia
| | - Christopher Vertullo
- Menzies Health Institute, Griffith University, Gold Coast, Queensland, Australia
- Knee Research Australia, Gold Coast, Queensland, Australia
| | - Joshua Byrnes
- Centre for Applied Health Economics, School of Medicine and Dentistry, Griffith University, 170 Kessels Road, Nathan, Queensland, 4111, Australia
- Menzies Health Institute, Griffith University, Gold Coast, Queensland, Australia
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The Cost of Hip and Knee Revision Arthroplasty by Diagnosis-Related Groups: Comparing Time-Driven Activity-Based Costing and Traditional Accounting. J Arthroplasty 2021; 36:2674-2679.e3. [PMID: 33875286 DOI: 10.1016/j.arth.2021.03.041] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/13/2021] [Accepted: 03/15/2021] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Traditional hospital cost accounting (TA) has innate disadvantages that limit the ability to meaningfully measure care pathways and quality improvement. Time-driven activity-based costing (TDABC) allows a meticulous account of costs in primary total joint arthroplasty (TJA). However, differences between TA and TDABC have not been examined in revision hip and knee TJA (rTJA). We aimed to compare total costs of rTJA by the diagnosis-related group (DRG), measured by TDABC vs TA. METHODS Overall costs were calculated for rTJA care cycles by DRG for 2 years of financial data (2018-2019) at our single-specialty orthopedic institution using TA and TDABC. Costs derived from TDABC, based on time and resources used, were compared with costs derived from TA based on historical costs. Proportions of implant and nonimplant costs were measured to total TA costs. RESULTS Seven hundred ninety-three rTJAs were included in this study, with TA methodology resulting in higher cost estimates. The total cost per DRG 468, rTJA with no comorbidities or complications (CC), DRG 467, rTJA with CC, and DRG 466, rTJA with major CC, estimated by TDABC was 69%, 67%, and 49% of the estimation by TA, respectively. Implant and nonimplant costs represented different proportions between methodologies. CONCLUSION Considerable differences exist, as TA estimations were 31%-51% higher than TDABC. The true cost is likely a value between the estimations, but TDABC presents granular and patient-specific cost data. TDABC for rTJA provides valuable bottom-up information on cost centers in the care pathway and, with targeted interventions, may lead to a more optimal delivery of value-based health care.
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Fang CJ, Shaker JM, Ward DM, Jawa A, Mattingly DA, Smith EL. Financial Burden of Revision Hip and Knee Arthroplasty at an Orthopedic Specialty Hospital: Higher Costs and Unequal Reimbursements. J Arthroplasty 2021; 36:2680-2684. [PMID: 33840537 DOI: 10.1016/j.arth.2021.03.044] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 03/06/2021] [Accepted: 03/18/2021] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND As demand for primary total joint arthroplasty (TJA) continues to grow, a proportionate increase in revision TJA (rTJA) is expected. It is essential to understand costs and reimbursement of rTJA as our country moves to bundled payment models. We aimed (1) to characterize implant and total hospital costs, (2) assess reimbursement, and (3) determine revenue for rTJA in comparison with primary TJA. METHODS The average implant and total hospital cost of all primary and rTJA procedures by diagnosis-related group (DRG) was calculated using time-driven activity-based costing at an orthopedic hospital from 2018 to 2020. Average reimbursement and payer type were assessed by DRG. Revenue was calculated by deducting average time-driven activity-based costing total costs from reimbursement. RESULTS 13,946 arthroplasties were included in the study. Implant cost comprised 55.8% of total hospital costs for rTJA DRG 468, compared with 43.6% of total hospital costs for primary TJA DRG 470. Total hospital costs for DRG 468 were 61.1% more than DRG 470. Reimbursement for rTJA was 1.23x more than primary TJA. Private payers paid 23.2% more than Medicare for rTJA. Margin for DRG 468 was 1.5% less than primary DRG 470. CONCLUSION rTJA requires more hospital resources and costs than primaries, yet hospital reimbursement may be inadequate with the additional expenditures necessary to provide optimal care. If hospitals cannot perform revision services under the current reimbursement model, patient access may be limited. Implant costs are a major contributor to overall rTJA cost. Strategies are needed to reduce revision implant costs to improve value of care. LEVEL OF EVIDENCE Level III, economic and decision analysis.
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Affiliation(s)
- Christopher J Fang
- Department of Orthopedic Surgery, New England Baptist Hospital, Boston, MA
| | - Jonathan M Shaker
- Department of Orthopedic Surgery, New England Baptist Hospital, Boston, MA
| | - Daniel M Ward
- Department of Orthopedic Surgery, New England Baptist Hospital, Boston, MA
| | - Andrew Jawa
- Department of Orthopedic Surgery, New England Baptist Hospital, Boston, MA
| | - David A Mattingly
- Department of Orthopedic Surgery, New England Baptist Hospital, Boston, MA
| | - Eric L Smith
- Department of Orthopedic Surgery, New England Baptist Hospital, Boston, MA
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Fang C, Pagani N, Gordon M, Talmo CT, Mattingly DA, Smith EL. Episode-of-Care Costs for Revision Total Joint Arthroplasties by Decadal Age Groups. Geriatrics (Basel) 2021; 6:49. [PMID: 34064743 PMCID: PMC8162336 DOI: 10.3390/geriatrics6020049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 04/24/2021] [Accepted: 05/06/2021] [Indexed: 11/28/2022] Open
Abstract
The demand for revision total joint arthroplasties (rTJAs) is expected to increase as the age of the population continues to rise. Accurate cost data regarding hospital expenses for differing age groups are needed to deliver optimal care within value-based healthcare (VBHC) models. The aim of this study was to compare the total in-hospital costs by decadal groups following rTJA and to determine the primary drivers of the costs for these procedures. Time-driven activity-based costing (TDABC) was used to capture granular hospital costs. A total of 551 rTJAs were included in the study, with 294 sexagenarians, 198 septuagenarians, and 59 octogenarians and older. Sexagenarians had a lower ASA classification (2.3 vs. 2.4 and 2.7; p < 0.0001) and were more often privately insured (66.7% vs. 24.2% and 33.9%; p < 0.0001) as compared to septuagenarians and octogenarians and older, respectively. Sexagenarians were discharged to home at a higher rate (85.3% vs. 68.3% and 34.3%; p < 0.0001), experienced a longer operating room (OR) time (199.8 min vs. 189.7 min and 172.3 min; p = 0.0195), and had a differing overall hospital length of stay (2.8 days vs. 2.7 days and 3.6 days; p = 0.0086) compared to septuagenarians and octogenarians and older, respectively. Sexagenarians had 7% and 23% less expensive personnel costs from post-anesthesia care unit (PACU) to discharge (p < 0.0001), and 1% and 24% more expensive implant costs (p = 0.077) compared to septuagenarians and octogenarians and older, respectively. Sexagenarians had a lower total in-hospital cost for rTJAs by 0.9% compared to septuagenarians but 12% more expensive total in-hospital costs compared to octogenarians and older (p = 0.185). Multivariate linear regression showed that the implant cost (0.88389; p < 0.0001), OR time (0.12140; p < 0.0001), personnel cost from PACU through to discharge (0.11472; p = 0.0007), and rTHAs (-0.03058; p < 0.0001) to be the strongest associations with overall costs. Focusing on the implant costs and OR times to reduce costs for all age groups for rTJAs is important to provide cost-effective VBHC.
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Affiliation(s)
- Christopher Fang
- New England Baptist Hospital, 125 Parker Hill Ave, Boston, MA 02120, USA; (C.F.); (C.T.T.); (D.A.M.)
| | - Nicholas Pagani
- Department of Orthopaedic Surgery, Tufts Medical Center, 800 Washington St, Boston, MA 02111, USA; (N.P.); (M.G.)
| | - Matthew Gordon
- Department of Orthopaedic Surgery, Tufts Medical Center, 800 Washington St, Boston, MA 02111, USA; (N.P.); (M.G.)
| | - Carl T. Talmo
- New England Baptist Hospital, 125 Parker Hill Ave, Boston, MA 02120, USA; (C.F.); (C.T.T.); (D.A.M.)
| | - David A. Mattingly
- New England Baptist Hospital, 125 Parker Hill Ave, Boston, MA 02120, USA; (C.F.); (C.T.T.); (D.A.M.)
| | - Eric L. Smith
- New England Baptist Hospital, 125 Parker Hill Ave, Boston, MA 02120, USA; (C.F.); (C.T.T.); (D.A.M.)
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Jella TK, Acuña AJ, Samuel LT, Schwarzkopf R, Fehring TK, Kamath AF. Medicare Physician Fee Reimbursement for Revision Total Knee Arthroplasty Has Not Kept Up with Inflation from 2002 to 2019. J Bone Joint Surg Am 2021; 103:778-785. [PMID: 33269896 DOI: 10.2106/jbjs.20.01034] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND As orthopaedic physician fees continue to come under scrutiny by the U.S. Centers for Medicare & Medicaid Services (CMS), there is a continued need to evaluate trends in reimbursement rates across contemporary time intervals. Although substantially lower work relative value units (RVUs) have been previously demonstrated for septic revision total knee arthroplasty (TKA) compared with aseptic revisions, to our knowledge, there has been no corresponding analysis comparing total physician fees. Therefore, the purpose of our study was to analyze temporal trends in Medicare physician fees for septic and aseptic revision TKAs. METHODS Current Procedural Terminology (CPT) codes related to septic 1-stage and 2-stage revision TKAs and aseptic revision TKAs were categorized. From 2002 to 2019, the facility rates of physician fees associated with each CPT code were obtained from the CMS Physician Fee Schedule Look-Up Tool. Monetary data from Medicare Administrative Contractors at 85 locations were used to calculate nationally representative means. All total physician fee values were adjusted for inflation and were translated to 2019 U.S. dollars using Consumer Price Index data from the U.S. Bureau of Labor Statistics. Cumulative annual percentage changes and compound annual growth rates (CAGRs) were computed utilizing adjusted physician fee data. RESULTS After adjusting for inflation, the total mean Medicare reimbursement (and standard deviation) for aseptic revision TKA decreased 24.83% ± 3.65% for 2-component revision and 24.21% ± 3.68% for 1-component revision. The mean septic revision TKA total Medicare reimbursement declined 23.29% ± 3.73% for explantation and 33.47% ± 3.24% for reimplantation. Both the dollar amount (p < 0.0001) and the percentage (p < 0.0001) of the total Medicare reimbursement decline for septic revision TKA were significantly greater than the decline for aseptic revision TKA. CONCLUSIONS Septic revision TKAs have been devalued at a rate greater than their aseptic counterparts over the past 2 decades. Coupled with our findings, the increased resource utilization of septic revision TKAs may result in financial barriers for physicians and subsequently may reduce access to care for patients with periprosthetic joint infections. CLINICAL RELEVANCE The devaluation of revision TKAs may result in reduced patient access to infection management at facilities unable to bear the financial burden of these procedures.
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Affiliation(s)
- Tarun K Jella
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Alexander J Acuña
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Linsen T Samuel
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Ran Schwarzkopf
- Department of Orthopedic Surgery, New York University Langone Health Medical Center, New York, NY
| | | | - Atul F Kamath
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
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Holland G, Brown G, Goudie S, Brenkel I, Walmsley PJ. Results of Using a "2-in-1" Single-Stage Revision Total Knee Arthroplasty for Infection with Associated Bone Loss: Prospective 2-Year Follow-Up. J Knee Surg 2021; 34:526-532. [PMID: 31569257 DOI: 10.1055/s-0039-1697963] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Prosthetic joint infections provide a complex challenge for management, owing to their often difficult diagnoses, need for multiple surgeries, and increased technical and financial requirements. The '2 in 1' single-stage approaches have been recently advocated in the field of arthroplasty on account of their reduction in risks, costs, and complications. The aim of our study was to investigate the outcomes of this variant of single-stage revision, which is used in the setting of infection following primary total knee replacement (TKR) and associated bone loss. Prospective data were collected from all patients presenting with an infection following primary TKR over an 8-year period (2009-2017). We examined revision procedures that were undertaken as a single-stage procedure and had bone loss present. Patients were followed-up for evidence of recurrent infection. Functional assessments were conducted using range of motion, Oxford Knee Score (OKS), American Knee Society Score (AKSS), and Short Form-12 (SF-12) survey. Twenty-six patients were included in the analysis, two of whom had previously failed 2 stage revision; another three among them had failed debridement, antibiotics, irrigation, and implant retention procedures. The mean age was 72.5 years, mean body mass index was 33.4, and median American Society of Anesthesiologists (ASA) physical status classification was 2. The mean time to revision was 3.5 years (3 months to 12 years). Six patients had actively been discharging sinuses at the time of surgery. Only 4/26 patients possessed no positive microbiological cultures from deep tissue samples or joint aspirates. One patient was afflicted with a recurrence of infection. This patient did not require further surgery and was successfully treated with the help of long-term antibiotic suppression. There were statistically significant improvements in both the pain component of AKSS scores (preoperative 4.3 to postoperative 32.4) and the functional component of AKSS scores (preoperative 10.7 to postoperative 15.7). There was no significant improvement in flexion; however, mean extension (increased from 18.5 to 6.9 postoperative) and total range of motion (increased from 69.2 preoperative to 90.3 postoperative) both showed statistically significant improvements. The use of "2-in-1" single-stage revision can be considered as an effective option for treating infection following TKR and associated bone loss.
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Affiliation(s)
- George Holland
- Department of Trauma and Orthopaedics, NHS Fife, Kirkcaldy, United Kingdom
| | - Gavin Brown
- Department of Trauma and Orthopaedics, NHS Fife, Kirkcaldy, United Kingdom
| | - Stuart Goudie
- Department of Trauma and Orthopaedics, NHS Fife, Kirkcaldy, United Kingdom
| | - Ivan Brenkel
- Department of Trauma and Orthopaedics, NHS Fife, Kirkcaldy, United Kingdom
| | - Philip J Walmsley
- Department of Trauma and Orthopaedics, NHS Fife, Kirkcaldy, United Kingdom
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Mayer AS, Erb S, Kim RH, Dennis DA, Shirname-More L, Pratte KA, Barker EA, Maier LA, Pacheco KA. Sensitization to Implant Components Is Associated with Joint Replacement Failure: Identification and Revision to Nonallergenic Hardware Improves Outcomes. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2021; 9:3109-3117.e1. [PMID: 33744472 DOI: 10.1016/j.jaip.2020.12.068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 12/11/2020] [Accepted: 12/29/2020] [Indexed: 10/21/2022]
Abstract
BACKGROUND Over 90% of one million annual US joint replacements are highly successful. Nonetheless, 10% do poorly owing to infection or mechanical issues. Many implant components are sensitizers, and sensitization could also contribute to implant failure. OBJECTIVE To determine the prevalence of implant sensitization in joint failure patients, their clinical characteristics, and implant revision outcomes. We hypothesized that sensitized patients would improve when revised with nonallergenic materials. METHODS We prospectively enrolled 105 joint failure patients referred by orthopedic surgeons who had already excluded infection or mechanical causes. Patients provided informed consent, completed a history and physical examination, patch testing to metals and bone cement, and a nickel lymphocyte proliferation test. A study coordinator was able to contact 64% of patients (n = 67) 9 to 12 months later to evaluate outcomes. RESULTS A total of 59% were sensitized to an implant component: 32% to metal and 37% to bone cement. The nickel lymphocyte proliferation test was 60% sensitive and 96% specific in diagnosing nickel sensitization. Most sensitized subjects reported no or uncertain histories of reactions to a specific material. Implant sensitized patients were younger and reported previous eczema, joint itching, and implant loosening. By 9 to 12 months later, most patients with a revised implant (revised) described significant improvement (16 of 22 revised for sensitization [P = .0003] vs 9 of 13 revised without sensitization [P = .047]) compared with patients without implant revision). All revised patients with sensitization used components to which they were not sensitized. Pain (P = .001), swelling (P = .035), and instability (P = .006) were significantly reduced in the revised sensitized group. CONCLUSIONS Sensitization to implant components is an important cause of unexplained joint replacement failure. Joint revisions based on sensitization information resulted in significant improvements.
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Affiliation(s)
- Annyce S Mayer
- Division of Environmental and Occupational Health Sciences, Department of Medicine, National Jewish Health, Denver, Colo; Division of Environmental and Occupational Health, University of Colorado School of Medicine, School of Public Health, Aurora, Colo
| | - Samantha Erb
- Graduate Medical Education, Northside Hospital, St Petersburg, Fla
| | | | - Douglas A Dennis
- Department of Bioengineering, Daniel Felix Ritchie School of Engineering and Computer Science, University of Denver, Denver, Colo; Department of Orthopedics, CU Anschutz School of Medicine, Aurora, Colo
| | - Lata Shirname-More
- Division of Environmental and Occupational Health Sciences, Department of Medicine, National Jewish Health, Denver, Colo
| | | | - Elizabeth A Barker
- Division of Environmental and Occupational Health Sciences, Department of Medicine, National Jewish Health, Denver, Colo
| | - Lisa A Maier
- Division of Environmental and Occupational Health Sciences, Department of Medicine, National Jewish Health, Denver, Colo; Division of Environmental and Occupational Health, University of Colorado School of Medicine, School of Public Health, Aurora, Colo; Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, School of Medicine, University of Colorado Denver, Aurora, Colo
| | - Karin A Pacheco
- Division of Environmental and Occupational Health Sciences, Department of Medicine, National Jewish Health, Denver, Colo; Division of Environmental and Occupational Health, University of Colorado School of Medicine, School of Public Health, Aurora, Colo.
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Siddiqi A, Smith T, McPhilemy JJ, Ranawat AS, Sculco PK, Chen AF. Soft-Tissue Balancing Technology for Total Knee Arthroplasty. JBJS Rev 2021; 8:e0050. [PMID: 31899697 DOI: 10.2106/jbjs.rvw.19.00050] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
» Improperly balanced total knee arthroplasties are at increased risk for complications including residual pain and/or instability, which are often corrected by a revision surgical procedure.
» Because of the morbidity and financial burden associated with revision total knee arthroplasty, different technological applications, such as tibial insert sensors and computer-assisted gap balancing, are being used to assist with soft-tissue balancing during primary total knee arthroplasty.
» Computer-assisted gap balancing increases the accuracy of mechanical alignment and improves the precision of balancing flexion and extension gaps during total knee arthroplasty. It is unclear whether this translates to improved short-term or long-term outcome measures. Considerations of this technology include increased cost, increased operative time, and a steep learning curve.
» Intraoperative sensors increase the accuracy of balancing by quantifying the mediolateral intercompartmental load distribution through the range of motion, which may lead to improved outcome scores, patient satisfaction, higher activity levels, and decreased pain. The advantages of this technology compared with computer assistance include decreased cost and no disruption of operative time or workflow. Limited availability with constrained implants, limited implant choices, and a lack of long-term follow-up data have reduced utilization of intraoperative sensors.
» Computer-assisted gap balancing and intraoperative sensors are not yet universally accepted, and the cost-benefit ratio associated with their use remains a consideration in today’s cost-conscious health-care environment. Future research should focus on longer-term follow-up to evaluate implant survivorship, cost-effectiveness, and clinical outcomes.
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Affiliation(s)
- Ahmed Siddiqi
- Philadelphia College of Osteopathic Medicine, Philadelphia, Pennsylvania
| | - Tyler Smith
- Philadelphia College of Osteopathic Medicine, Philadelphia, Pennsylvania
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Petrie MJ, Harrison TP, Salih S, Gordon A, Hamer AJ, Buckley SC, Kerry RM. Financial analysis of revision knee surgery at a tertiary referral centre as classified according to the Revision Knee Complexity Classification (RKCC). Knee 2021; 29:469-477. [PMID: 33744694 DOI: 10.1016/j.knee.2021.02.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 01/13/2021] [Accepted: 02/22/2021] [Indexed: 02/02/2023]
Abstract
BACKGROUND Revision total knee arthroplasty (rTKA) can be complex, with greater costs to the treating hospital than primary TKA. A rTKA regional network has been proposed in England. The aim of this work was to accurately quantify current costs and reimbursement for the rTKA service and to assess whether costs are proportional to case complexity at a tertiary referral centre within the National Health Service (NHS). METHODS A review of all rTKA performed at our institution over two consecutive financial years (2017-2019) was performed. Cases were classified according to the Revision Knee Complexity Classification (RKCC) and by mode of failure; "infected" and "non-infected". Financial data was acquired through Patient-Level Information and Costing System (PLICS). The primary outcome was the financial difference between tariff and cost per episode. Comparisons between groups were analysed using analysis of variance and two-tailed unpaired t-test as appropriate. RESULTS 159 patients underwent 188 rTKA procedures. Length of stay and cost significantly increased between complexity groups (p < 0.0001) and for infected revisions (p < 0.0001). All groups sustained a mean deficit but this significantly increased with revision complexity (from £1,903 to £5,269 per case) and for infected revisions. The total deficit to the Trust for the two-year rTKA service was £667,091. CONCLUSIONS The current level of NHS reimbursement are inadequate for centres that offer rTKA and should be more closely aligned to case complexity. An increase in the most complex rTKA at major revision centres will undoubtedly place an even greater strain on the finances of these units.
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Affiliation(s)
- M J Petrie
- Lower Limb Arthroplasty Unit, Sheffield Teaching Hospitals NHS Foundation Trust, Northern General Hospital, Herries Road, Sheffield S5 7AU, United Kingdom.
| | - T P Harrison
- Lower Limb Arthroplasty Unit, Sheffield Teaching Hospitals NHS Foundation Trust, Northern General Hospital, Herries Road, Sheffield S5 7AU, United Kingdom
| | - S Salih
- Lower Limb Arthroplasty Unit, Sheffield Teaching Hospitals NHS Foundation Trust, Northern General Hospital, Herries Road, Sheffield S5 7AU, United Kingdom
| | - A Gordon
- Lower Limb Arthroplasty Unit, Sheffield Teaching Hospitals NHS Foundation Trust, Northern General Hospital, Herries Road, Sheffield S5 7AU, United Kingdom
| | - A J Hamer
- Lower Limb Arthroplasty Unit, Sheffield Teaching Hospitals NHS Foundation Trust, Northern General Hospital, Herries Road, Sheffield S5 7AU, United Kingdom
| | - S C Buckley
- Lower Limb Arthroplasty Unit, Sheffield Teaching Hospitals NHS Foundation Trust, Northern General Hospital, Herries Road, Sheffield S5 7AU, United Kingdom
| | - R M Kerry
- Lower Limb Arthroplasty Unit, Sheffield Teaching Hospitals NHS Foundation Trust, Northern General Hospital, Herries Road, Sheffield S5 7AU, United Kingdom
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Yao JJ, Hevesi M, Visscher SL, Ransom JE, Lewallen DG, Berry DJ, Maradit Kremers H. Direct Inpatient Medical Costs of Operative Treatment of Periprosthetic Hip and Knee Infections Are Twofold Higher Than Those of Aseptic Revisions. J Bone Joint Surg Am 2021; 103:312-318. [PMID: 33252589 PMCID: PMC8327701 DOI: 10.2106/jbjs.20.00550] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Periprosthetic joint infections (PJIs) following total hip arthroplasty (THA) and total knee arthroplasty (TKA) are associated with substantial morbidity. A better understanding of the costs of PJI treatment can inform prevention, treatment, and reimbursement strategies. The purpose of the present study was to describe direct inpatient medical costs associated with the treatment of hip and knee PJI. METHODS At a single tertiary care institution, 176 hips and 266 knees that underwent 2-stage revisions for the treatment of PJI from 2009 to 2015 were compared with 1,611 hips and 1,276 knees that underwent revisions for aseptic indications. In addition, 84 hips and 137 knees that underwent irrigation and debridement (I&D) with partial component exchange were compared with 39 hips and 138 knees that underwent partial component exchange for aseptic indications. Line-item details of services billed during hospitalization were retrieved, and standardized direct medical costs were calculated in 2018 inflation-adjusted dollars. RESULTS The mean direct medical cost of 2-stage revision THA performed for the treatment of PJI was significantly higher than that of aseptic revision THA ($58,369 compared with $22,846, p < 0.001). Similarly, the cost of 2-stage revision TKA performed for the treatment of PJI was significantly higher than that of aseptic revision TKA ($56,900 compared with $24,630, p < 0.001). Even when the total costs of aseptic revisions were doubled for a representative comparison with 2-stage procedures, the costs of PJI procedures were 15% to 28% higher than those of the doubled costs of aseptic revisions (p < 0.001). The mean direct medical cost of I&D procedures for PJI was about twofold higher than of partial component exchange for aseptic indications. CONCLUSIONS The direct medical costs of operative treatment of PJI following THA and TKA are twofold higher than the costs of similar aseptic revisions. The high economic burden of PJI warrants efforts to reduce the incidence of PJI. Reimbursement schemes should account for the high costs of treating PJI in order to ensure sustainable patient care. LEVEL OF EVIDENCE Economic Level IV. See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- Jie J Yao
- Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, Washington
| | - Mario Hevesi
- Departments of Orthopedic Surgery (M.H., D.G.L., D.J.B., and H.M.K.) and Health Sciences Research (S.L.V., J.E.R., and H.M.K.), Mayo Clinic, Rochester, Minnesota
| | - Sue L Visscher
- Departments of Orthopedic Surgery (M.H., D.G.L., D.J.B., and H.M.K.) and Health Sciences Research (S.L.V., J.E.R., and H.M.K.), Mayo Clinic, Rochester, Minnesota
| | - Jeanine E Ransom
- Departments of Orthopedic Surgery (M.H., D.G.L., D.J.B., and H.M.K.) and Health Sciences Research (S.L.V., J.E.R., and H.M.K.), Mayo Clinic, Rochester, Minnesota
| | - David G Lewallen
- Departments of Orthopedic Surgery (M.H., D.G.L., D.J.B., and H.M.K.) and Health Sciences Research (S.L.V., J.E.R., and H.M.K.), Mayo Clinic, Rochester, Minnesota
| | - Daniel J Berry
- Departments of Orthopedic Surgery (M.H., D.G.L., D.J.B., and H.M.K.) and Health Sciences Research (S.L.V., J.E.R., and H.M.K.), Mayo Clinic, Rochester, Minnesota
| | - Hilal Maradit Kremers
- Departments of Orthopedic Surgery (M.H., D.G.L., D.J.B., and H.M.K.) and Health Sciences Research (S.L.V., J.E.R., and H.M.K.), Mayo Clinic, Rochester, Minnesota
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The projected volume of primary and revision total knee arthroplasty will place an immense burden on future health care systems over the next 30 years. Knee Surg Sports Traumatol Arthrosc 2021; 29:3287-3298. [PMID: 32671435 PMCID: PMC7362328 DOI: 10.1007/s00167-020-06154-7] [Citation(s) in RCA: 139] [Impact Index Per Article: 46.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 07/10/2020] [Indexed: 01/08/2023]
Abstract
PURPOSE Total knee arthroplasty (TKA) rates have increased substantially in the recent decades worldwide, with Germany being one of the leading countries in the prevalence of TKA. The aim of this study was to provide an overview of treatment changes during the last decade and to project the expected burden of primary and revision TKA (rTKA) for the next 30 years. METHODS Comprehensive nationwide data from Germany was used to quantify primary and revision TKA rates as a function of age and gender. Projections were performed with use of a Poisson regression models and a combination of exponential smoothing and autoregressive integrated moving average models on historical procedure rates in relation to official population projections from 2020 to 2050. RESULTS The incidence rate of primary TKAs is projected to increase by around 43% to 299 per 100,000 inhabitants [95% CI 231-368], leading to a projected total number of 225,957 primary TKAs in 2050 (95% CI 178,804-276,442). This increase has been related to a growing number of TKA performed in male patients, with the highest increase modelled in patients between 50 and 65 years of age. At the same time, the annual total number of revision procedures is forecast to increase even more rapidly by almost 90%, accounting for 47,313 (95% CI 15,741-78,885; IR = 62.7 per 100,000, 95% CI 20.8-104.5) procedures by 2050. Those numbers are primarily associated with a rising number of rTKAs secondary to periprosthetic joint infection (PJI). CONCLUSIONS Using this country- specific forecast approach, a rising number of primary TKA and an even more rapidly growing number of rTKA, especially for PJI, has been projected until 2050, which will inevitably provide a huge challenge for the future health care system. As many other industrialized nations will face similar demographic and procedure-specific developments, these forecasts should be alarming for many health care systems worldwide and emphasize the tremendous need for an appropriate financial and human resource management in the future. LEVEL OF EVIDENCE Level III, prognostic study, economic and decision analysis.
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Sabah SA, Alvand A, Price AJ. Revision knee replacement for prosthetic joint infection: Epidemiology, clinical outcomes and health-economic considerations. Knee 2021; 28:417-421. [PMID: 33500184 DOI: 10.1016/j.knee.2020.12.024] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 12/21/2020] [Indexed: 02/02/2023]
Abstract
Prosthetic joint infection (PJI) is a devastating complication of knee replacement surgery. Recent evidence has shown that the burden of disease is increasing as more and more knee replacement procedures are performed. The current incidence of revision total knee replacement (TKR) for PJI is estimated at 7.5 cases per 1000 primary joint replacement procedures at 10 years. Revision TKR for PJI is complex surgery, and is associated to a high rate of post-operative complications. The 5-year patient mortality is comparable to some common cancer diagnoses, and more than 15% of patients require re-revision by 10 years. Patient-reported outcome measures (PROMs) including joint function may be worse following revision TKR for PJI than for aseptic indications. The complexity and extended length of the treatment pathway for PJI places a significant burden on the healthcare system, highlighting it as an area for future research to identify the most clinically and cost-effective interventions.
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Affiliation(s)
- Shiraz A Sabah
- Nuffield Orthopaedic Centre, Windmill Road, Oxford OX2 9JA, UK
| | - Abtin Alvand
- Nuffield Orthopaedic Centre, Windmill Road, Oxford OX2 9JA, UK
| | - Andrew J Price
- Nuffield Orthopaedic Centre, Windmill Road, Oxford OX2 9JA, UK.
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Sanz-Ruiz P, Matas-Diez JA, Villanueva-Martínez M, Santos-Vaquinha Blanco AD, Vaquero J. Is Dual Antibiotic-Loaded Bone Cement More Effective and Cost-Efficient Than a Single Antibiotic-Loaded Bone Cement to Reduce the Risk of Prosthetic Joint Infection in Aseptic Revision Knee Arthroplasty? J Arthroplasty 2020; 35:3724-3729. [PMID: 32682594 DOI: 10.1016/j.arth.2020.06.045] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 06/05/2020] [Accepted: 06/16/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Higher rates of prosthetic joint infections (PJIs) are related to patient risk factors and/or to special surgical procedures such as revision total knee arthroplasty (rTKA). Among the measures discussed to better protect those patients from the higher infection risks use of dual antibiotic-loaded bone cement has emerged as a further prophylactic option. METHODS This retrospective study included 246 patients undergoing strictly aseptic revision knee arthroplasty at our institution in the time period 2015-2018. Based on the type of bone cement used for the cementation of the revision prosthesis, 2 groups were defined. In total, 143 patients received the low-dose single antibiotic-loaded bone cement (SALBC) PALACOS R+G and 103 patients received the high-dose dual antibiotic-loaded bone cement (DALBC) COPAL G+C. The number of PJI cases in each group over a follow-up time of minimum 1 year was compared and the extra costs for the DALBC use calculated against the economic savings per each avoided PJI case on basis of 3 different assumptions (treatment costs and amount of cement use). RESULTS Use of DALBC in aseptic rTKA was associated with a significant reduction in PJI cases (relative risk = 57%, PJI rate in the SALBC group 4.1% vs 0% in the DALBC group, P = 0.035). The calculated total savings per patient was $1367. Depending on the economic assumptions the range of savings was between $1413 (less favorable calculation model) and $3661 (most favorable calculation model). CONCLUSION The use of DALBC in rTKA has been found to be more effective in preventing PJI and proved cost-efficient in all our cost-calculation models.
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Affiliation(s)
- Pablo Sanz-Ruiz
- Department of Traumatology and Orthopaedic Surgery, General University Hospital Gregorio Marañón, Madrid, Spain; Faculty of Medicine, Complutense University of Madrid, Madrid, Spain
| | - José Antonio Matas-Diez
- Department of Traumatology and Orthopaedic Surgery, General University Hospital Gregorio Marañón, Madrid, Spain
| | | | | | - Javier Vaquero
- Department of Traumatology and Orthopaedic Surgery, General University Hospital Gregorio Marañón, Madrid, Spain; Faculty of Medicine, Complutense University of Madrid, Madrid, Spain
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Shimabukuro M. Antibacterial Property and Biocompatibility of Silver, Copper, and Zinc in Titanium Dioxide Layers Incorporated by One-Step Micro-Arc Oxidation: A Review. Antibiotics (Basel) 2020; 9:E716. [PMID: 33092058 PMCID: PMC7589568 DOI: 10.3390/antibiotics9100716] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 10/16/2020] [Accepted: 10/19/2020] [Indexed: 02/07/2023] Open
Abstract
Titanium (Ti) and its alloys are commonly used in medical devices. However, biomaterial-associated infections such as peri-implantitis and prosthetic joint infections are devastating and threatening complications for patients, dentists, and orthopedists and are easily developed on titanium surfaces. Therefore, this review focuses on the formation of biofilms on implant surfaces, which is the main cause of infections, and one-step micro-arc oxidation (MAO) as a coating technology that can be expected to prevent infections due to the implant. Many researchers have provided sufficient data to prove the efficacy of MAO for preventing the initial stages of biofilm formation on implant surfaces. Silver (Ag), copper (Cu), and zinc (Zn) are well used and are incorporated into the Ti surface by MAO. In this review, the antibacterial properties, cytotoxicity, and durability of these elements on the Ti surface incorporated by one-step MAO will be summarized. This review is aimed at enhancing the importance of the quantitative control of Ag, Cu, and Zn for their use in implant surfaces and the significance of the biodegradation behavior of these elements for the development of antibacterial properties.
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Affiliation(s)
- Masaya Shimabukuro
- Department of Biomaterials, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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Probasco WV, Cefalu C, Lee R, Lee D, Gu A, Dasa V. Prevalence of idiopathically elevated ESR and CRP in patients undergoing primary total knee arthroplasty as a function of body mass index. J Clin Orthop Trauma 2020; 11:S722-S728. [PMID: 32999546 PMCID: PMC7503783 DOI: 10.1016/j.jcot.2020.05.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 05/22/2020] [Accepted: 05/26/2020] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) are commonly used inflammatory markers utilized to aid in the diagnosis of periprosthetic infection (PJI). Patients with obesity, however, are known to have elevated baseline levels of these inflammatory markers. Therefore, this retrospective study aimed to determine the relationship between elevated ESR and CRP and body mass index (BMI) in patients undergoing total knee arthroplasty (TKA). In doing so, physicians can better determine whether BMI should be taken into account when evaluating the prognostic value of elevated preoperative ESR and CRP levels for risk of PJI in primary TKA patients. METHODS This is a retrospective case series of 181 patients who had undergone primary TKA at a single institution. Patients undergoing primary unilateral TKA were eligible unless they had undergone previous TKA, contralateral knee symptoms, or elevated white blood cell (WBC) count. A linear regression model was utilized to demonstrate the relationship between proportions of patients with elevated biomarker values and categories of BMI. Analysis of variance and independent two-sample t-tests were utilized to assess differences in mean ESR, CRP, and WBC levels between the "healthy patients" and "patients with comorbidities" subgroups within each BMI category. RESULTS Eligible patients (n = 181) were stratified by BMI category. Elevated ESR was associated significantly with BMI (ESR: r2 = 0.89, P < 0.001) unlike elevated CRP (r2 = 0.82, P = 0.133) and WBC count (r2 = .01; P = .626). No statistically significant differences in ESR values and WBC count between the "healthy patients" versus "patients with comorbidities" were demonstrated within any BMI category. In patients of normal weight (BMI 20-25 kg/m2), "healthy patients" had a statistically significantly higher mean CRP level than "patients with comorbidities" (1.73 mg/L vs. 0.70 mg/L, P < 0.001). There were no other statistically significant differences in mean CRP levels by health status. CONCLUSION Caution is advised when utilizing ESR and CRP to diagnose periprosthetic joint infection without considering BMI given that increasing preoperative levels of ESR and CRP are correlated with higher BMI.
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Affiliation(s)
- William V. Probasco
- Department of Orthopedic Surgery, George Washington University, 2300 M Street NW, Washington DC, 20037, USA
- Department of Orthopedic Surgery, Louisiana State University Health Sciences Center, 1542 Tulane Avenue, New Orleans, LA, 70112, USA
| | - Charles Cefalu
- Department of Orthopedic Surgery, Harvard University, 55 Fruit Street, Boston, MA, 02114, USA
- Department of Orthopedic Surgery, Louisiana State University Health Sciences Center, 1542 Tulane Avenue, New Orleans, LA, 70112, USA
| | - Ryan Lee
- Department of Orthopedic Surgery, George Washington University, 2300 M Street NW, Washington DC, 20037, USA
| | - Danny Lee
- Department of Orthopedic Surgery, George Washington University, 2300 M Street NW, Washington DC, 20037, USA
| | - Alex Gu
- Department of Orthopedic Surgery, George Washington University, 2300 M Street NW, Washington DC, 20037, USA
| | - Vinod Dasa
- Department of Orthopedic Surgery, Louisiana State University Health Sciences Center, 1542 Tulane Avenue, New Orleans, LA, 70112, USA
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Staphylococcus aureus Aggregates on Orthopedic Materials under Varying Levels of Shear Stress. Appl Environ Microbiol 2020; 86:AEM.01234-20. [PMID: 32709721 DOI: 10.1128/aem.01234-20] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Accepted: 07/16/2020] [Indexed: 02/08/2023] Open
Abstract
Periprosthetic joint infection (PJI) occurring after artificial joint replacement is a major clinical issue requiring multiple surgeries and antibiotic interventions. Staphylococcus aureus is the bacterium most commonly responsible for PJI. Recent in vitro research has shown that staphylococcal strains rapidly form aggregates in the presence of synovial fluid (SF). We hypothesize that these aggregates provide early protection to bacteria entering the wound site, allowing them time to attach to the implant surface, leading to biofilm formation. Thus, understanding the attachment kinetics of these aggregates is critical in understanding their adhesion to various biomaterial surfaces. In this study, the number, size, and surface area coverage of aggregates as well as of single cells of S. aureus were quantified under various conditions on different orthopedic materials relevant to orthopedic surgery: stainless steel (316L), titanium (Ti), hydroxyapatite (HA), and polyethylene (PE). It was observed that, regardless of the material type, SF-induced aggregation resulted in reduced aggregate surface attachment and greater aggregate size than the single-cell populations under various shear stresses. Additionally, the surface area coverage of bacterial aggregates on PE was relatively high compared to that on other materials, which could potentially be due to the rougher surface of PE. Furthermore, increasing shear stress to 78 mPa decreased aggregate attachment to Ti and HA while increasing the aggregates' average size. Therefore, this study demonstrates that SF induced inhibition of aggregate attachment to all materials, suggesting that biofilm formation is initiated by lodging of aggregates on the surface features of implants and host tissues.IMPORTANCE Periprosthetic joint infection occurring after artificial joint replacement is a major clinical issue that require repeated surgeries and antibiotic interventions. Unfortunately, 26% of patients die within 5 years of developing these infections. Staphylococcus aureus is the bacterium most commonly responsible for this problem and can form biofilms to provide protection from antibiotics as well as the immune system. Although biofilms are evident on the infected implants, it is unclear how these are attached to the surface in the first place. Recent in vitro investigations have shown that staphylococcal strains rapidly form aggregates in the presence of synovial fluid and provide protection to bacteria, thus allowing them time to attach to the implant surface, leading to biofilm formation. In this study, we investigated the attachment kinetics of Staphylococcus aureus aggregates on different orthopedic materials. The information presented in this article will be useful in surgical management and implant design.
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Güngör E, Başarır K, Binnet MS. A retrospective comparison of costs for the primary and revision total knee arthroplasty in Turkey. ACTA ORTHOPAEDICA ET TRAUMATOLOGICA TURCICA 2020; 54:541-545. [PMID: 33155567 DOI: 10.5152/j.aott.2020.19114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE This study aimed to compare the cost profiles of patients who underwent a primary or revision total knee arthroplasty (TKA) and to determine the effects of the length of hospital stay, comorbidities, and septic and aseptic revision rates on the treatment costs. METHODS A total of 1,487 patients who underwent primary (n=1,328; 1,131 females, 197 males) or revision TKA (n=159; 137 females, 22 males) between 2010 and 2017 at our institution were retrospectively included in the current study. The patients' demographics (age and gender), the length of hospital stay, comorbidities, and septic and aseptic revision rates were collected from our hospital database. The total costs of revision and primary TKAs were calculated based on the prostheses and surgical equipment used, hospital stay, and other administrative costs in both the Turkish lira (TRY) and US dollar (USD) based on the parity of the 2 currencies from 2010 to 2017. RESULTS The average cost per patient for primary TKAs was 7,985±2,927 TRY (5,265 USD) in 2010 and 7,070±1,775 TRY (1,852 USD) in 2017. The average cost for revision TKAs was 13,647±4,095 TRY (8,999 USD) in 2010 and 22,806±6,155 TRY (5,973 USD) in 2017. In terms of the total costs, significant differences existed over the years, with a significantly higher difference in 2015 compared with that from 2010 to 2013 (p<0.001); however, no difference was determined among the age groups (p=0.675). The difference between the total costs of the septic (n=34; 17,964±13,028 TRY) and aseptic revisions (n=125; 23,377±12,815 TRY) was significant (p=0.001), with a higher cost for patients with septic TKAs but with no significant difference between the total costs for the patients with and without comorbidities (p=0.254). Additionally, the length of hospital stay was 2 times higher in patients with revision TKAs than in those with primary TKAs (12.3 vs 6.2 days). CONCLUSION Revision TKAs cause higher costs than primary TKAs, with a prolonged hospital stay. The septic background seems to be an independent predictive factor for increased costs in revision TKAs.
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Affiliation(s)
- Erdal Güngör
- Department of Orthopaedic and Traumatology, Ankara University, İbn-i Sina Hospital, Ankara, Turkey
| | - Kerem Başarır
- Department of Orthopaedic and Traumatology, Ankara University, İbn-i Sina Hospital, Ankara, Turkey
| | - Mehmet Serdar Binnet
- Department of Orthopaedic and Traumatology, Ankara University, İbn-i Sina Hospital, Ankara, Turkey
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A multifaceted biomimetic interface to improve the longevity of orthopedic implants. Acta Biomater 2020; 110:266-279. [PMID: 32344174 DOI: 10.1016/j.actbio.2020.04.020] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 03/23/2020] [Accepted: 04/09/2020] [Indexed: 01/22/2023]
Abstract
The rise of additive manufacturing has provided a paradigm shift in the fabrication of precise, patient-specific implants that replicate the physical properties of native bone. However, eliciting an optimal biological response from such materials for rapid bone integration remains a challenge. Here we propose for the first time a one-step ion-assisted plasma polymerization process to create bio-functional 3D printed titanium (Ti) implants that offer rapid bone integration. Using selective laser melting, porous Ti implants with enhanced bone-mimicking mechanical properties were fabricated. The implants were functionalized uniformly with a highly reactive, radical-rich polymeric coating generated using a unique combination of plasma polymerization and plasma immersion ion implantation. We demonstrated the performance of such activated Ti implants with a focus on the coating's homogeneity, stability, and biological functionality. It was shown that the optimized coating was highly robust and possessed superb physico-chemical stability in a corrosive physiological solution. The plasma activated coating was cytocompatible and non-immunogenic; and through its high reactivity, it allowed for easy, one-step covalent immobilization of functional biomolecules in the absence of solvents or chemicals. The activated Ti implants bio-functionalized with bone morphogenetic protein 2 (BMP-2) showed a reduced protein desorption and a more sustained osteoblast response both in vitro and in vivo compared to implants modified through conventional physisorption of BMP-2. The versatile new approach presented here will enable the development of bio-functionalized additively manufactured implants that are patient-specific and offer improved integration with host tissue. STATEMENT OF SIGNIFICANCE: Additive manufacturing has revolutionized the fabrication of patient-specific orthopedic implants. Although such 3D printed implants can show desirable mechanical and mass transport properties, they often require surface bio-functionalities to enable control over the biological response. Surface covalent immobilization of bioactive molecules is a viable approach to achieve this. Here we report the development of additively manufactured titanium implants that precisely replicate the physical properties of native bone and are bio-functionalized in a simple, reagent-free step. Our results show that covalent attachment of bone-related growth factors through ion-assisted plasma polymerized interlayers circumvents their desorption in physiological solution and significantly improves the bone induction by the implants both in vitro and in vivo.
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Goswami K, Stevenson KL, Parvizi J. Intraoperative and Postoperative Infection Prevention. J Arthroplasty 2020; 35:S2-S8. [PMID: 32046826 DOI: 10.1016/j.arth.2019.10.061] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 10/29/2019] [Accepted: 10/29/2019] [Indexed: 02/01/2023] Open
Abstract
Implementation of strategies for prevention of surgical site infection and periprosthetic joint infection is gaining further attention. We provide an overview of the pertinent evidence-based guidelines for infection prevention from the World Health Organization, the Centers for Disease Control and Prevention, and the second International Consensus Meeting on Musculoskeletal Infection. Future work is needed to ascertain clinical efficacy, optimal combinations, and the cost-effectiveness of certain measures.
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Affiliation(s)
- Karan Goswami
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA
| | | | - Javad Parvizi
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA
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DeBoer DK. Comparison of Traditional Molded, First-Generation Premolded, and Second-Generation Premolded Antibiotic-Loaded Polymethylmethacrylate Articulating Spacers for Treatment of Chronic Prosthetic Joint Infection of the Knee. J Arthroplasty 2020; 35:S53-S56. [PMID: 32046833 DOI: 10.1016/j.arth.2019.11.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 11/07/2019] [Accepted: 11/07/2019] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND The purpose of this study was to compare patients who had chronic prosthetic joint infection treated using three methods of articulating polymethylmethacrylate spacers in two-stage reimplantation. METHODS We identified 77 patients who had chronic prosthetic joint infection with a minimum of one-year follow-up. Reinfection rates were determined using modified International Consensus group criteria. RESULTS The overall reinfection rate was 18% (14 of 77 patients). Despite a higher medical comorbidity in the second-generation spacer cohort, there were no statistical differences in reinfection rates between articulating spacer types. CONCLUSION This study suggests that there were no differences in efficacy between the traditional molded, first-generation premolded, and second-generation premolded articulating spacers, but more studies with high level of evidence are needed.
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Balato G, de Matteo V, Ascione T, Di Donato SL, De Franco C, Smeraglia F, Baldini A, Mariconda M. Laboratory-based versus qualitative assessment of α-defensin in periprosthetic hip and knee infections: a systematic review and meta-analysis. Arch Orthop Trauma Surg 2020; 140:293-301. [PMID: 31300864 DOI: 10.1007/s00402-019-03232-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Two methods are currently available for the assay of α-defensin: the enzyme-linked immunosorbent assay (ELISA) and the lateral flow test. We aimed to assess the diagnostic accuracy of synovial fluid α-defensin and to compare the accuracy of the laboratory-based test and the qualitative assessment for the diagnosis of hip and knee prosthetic infection. MATERIALS AND METHODS We searched (from inception to May 2018) MEDLINE, Scopus, EMBASE, Web of Science, and Cochrane for studies on α-defensin in the diagnosis of periprosthetic joint infection (PJI). Sensitivity, specificity, positive and negative likelihood ratio (LR), and diagnostic odds ratio were analyzed using the bivariate diagnostic random-effects model. The receiver-operating curve for each method was calculated. RESULTS We included 13 articles in our meta-analysis, including 1170 patients who underwent total hip and knee arthroplasties revision; 368 (31%) had a joint infection according to MSIS and MSIS-modified criteria. Considering the false-positive result rate of 8% and false-negative result rate of 3%, pooled sensitivity and specificity were 0.90 (95% CI 0.83-0.94) and 0.95 (0.92-0.96), respectively. The area under the curve (AUC) was 0.94 (0.92-0.94). No statistical differences in terms of sensitivity and specificity were found between the laboratory-based and qualitative test. The pooled sensitivity and specificity of the two alpha-defensin assessment methods were: laboratory-based test 0.97 (95% CI 0.93-0.99) and 0.96 (95% CI 0.94-0.98), respectively; qualitative test 0.83 (95% CI 0.73-0.91) and 0.94 (95% CI 0.89-0.97), respectively. The diagnostic odds ratio of the α-defensin laboratory based was superior to that of the qualitative test (1126.085, 95% CI 352.172-3600.702 versus 100.9, 95% CI 30.1-338.41; p < 0.001). The AUC for immunoassay and qualitative tests was 0.97 (0.95-0.99) and 0.91 (0.88-0.99), respectively. CONCLUSION Detection of α-defensin is an accurate test for diagnosis of hip and knee prosthetic infections. The diagnostic accuracy of the two alpha-defensin assessment methods is comparable. The lateral flow assay is a valid, rapid, and more available diagnostic tool, particularly to rule out PJI.
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Affiliation(s)
- Giovanni Balato
- Section of Orthopaedic Surgery, Department of Public Health, School of Medicine, Federico II University, Via S. Pansini 5, 80131, Naples, Italy.
| | - Vincenzo de Matteo
- Section of Orthopaedic Surgery, Department of Public Health, School of Medicine, Federico II University, Via S. Pansini 5, 80131, Naples, Italy
| | - Tiziana Ascione
- Department of Infectious Diseases, D. Cotugno Hospital, AORN Dei Colli, Naples, Italy
| | - Sigismondo Luca Di Donato
- Section of Orthopaedic Surgery, Department of Public Health, School of Medicine, Federico II University, Via S. Pansini 5, 80131, Naples, Italy
| | - Cristiano De Franco
- Section of Orthopaedic Surgery, Department of Public Health, School of Medicine, Federico II University, Via S. Pansini 5, 80131, Naples, Italy
| | - Francesco Smeraglia
- Section of Orthopaedic Surgery, Department of Public Health, School of Medicine, Federico II University, Via S. Pansini 5, 80131, Naples, Italy
| | | | - Massimo Mariconda
- Section of Orthopaedic Surgery, Department of Public Health, School of Medicine, Federico II University, Via S. Pansini 5, 80131, Naples, Italy
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Samuel LT, Grits D, Acuña AJ, Piuzzi NS, Higuera-Rueda CA, Kamath AF. Work Relative Value Units Do Not Adequately Support the Burden of Infection Management in Revision Knee Arthroplasty. J Bone Joint Surg Am 2020; 102:230-236. [PMID: 31609889 DOI: 10.2106/jbjs.19.00776] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Revision total knee arthroplasty for infection is challenging. Septic revisions, whether 1-stage or 2-stage, may require more time and effort than comparable aseptic revisions. However, the burden of infection may not be reflected by the relative value units (RVUs) assigned to septic revision compared with aseptic revision. The purposes of this study were to compare the RVUs of aseptic and septic revision total knee arthroplasties and to calculate the RVU per minute for work effort. METHODS The American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP) database was analyzed for the years 2006 to 2017. The Current Procedural Terminology (CPT) code 27487 and the International Classification of Diseases, Ninth Revision (ICD-9) code 996.XX, excluding 996.6X, were used to identify all aseptic revision total knee arthroplasties (n = 12,907). The CPT code 27487 and the ICD-9 code 996.6X were used to determine all 1-stage septic revision total knee arthroplasties (n = 891). The CPT codes 27488 and 11981 were used to identify the first stage of a 2-stage revision (n = 293). The CPT codes 27447 and 11982 were used to identify the second stage of a 2-stage revision (n = 279). After 4:1 propensity score matching, 274 cases were identified per septic cohort (aseptic single-stage: n = 1,096). The RVU-to-dollar conversion factor was provided by the U.S. Centers for Medicare & Medicaid Services (CMS), and RVU dollar valuations were calculated. RESULTS The septic second-stage revision was used as the control group for comparisons. The RVU per minute for the aseptic 2-component revision was 0.215, from a mean operative time of 148.95 minutes. The RVU per minute for the septic, 2-component, 1-stage revision was 0.199, from a mean operative time of 160.6 minutes. For septic, 2-stage revisions, the first-stage RVU per minute was 0.157, from a mean operative time of 138.1 minutes. The second-stage RVU per minute was 0.144, from a mean operative time of 170.0 minutes. Two-component aseptic revision total knee arthroplasty was valued the highest. CONCLUSIONS Despite the increased complexity and worse postoperative outcomes associated with revision total knee arthroplasties for infection, the current physician reimbursement does not account for these challenges. This inadequate compensation may discourage providers from performing these operations and, in turn, make it more difficult for patients with periprosthetic joint infection to receive the necessary treatment. Therefore, the CPT code revaluation may be warranted for these procedures.
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Affiliation(s)
- Linsen T Samuel
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Daniel Grits
- Cleveland Clinic Lerner College of Medicine, Cleveland, Ohio
| | - Alexander J Acuña
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | - Nicolas S Piuzzi
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
| | | | - Atul F Kamath
- Department of Orthopaedic Surgery, Cleveland Clinic Foundation, Cleveland, Ohio
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46
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Vakharia RM, Sabeh KG, Sodhi N, Mont MA, Roche MW, Hernandez VH. A Nationwide Analysis on the Impact of Schizophrenia Following Primary Total Knee Arthroplasty: A Matched-Control Analysis of 49,176 Medicare Patients. J Arthroplasty 2020; 35:417-421. [PMID: 31711803 DOI: 10.1016/j.arth.2019.09.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 09/17/2019] [Accepted: 09/20/2019] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND The influence of schizophrenia on total knee arthroplasty (TKA) is limited in the literature. Therefore, the purpose of this study was to investigate whether patients with schizophrenia undergoing primary TKA have (1) longer in-hospital length of stay (LOS); (2) higher readmission rates; (3) higher medical complications; (4) higher implant-related complications; and (5) higher costs of care compared to controls. METHODS Patients with schizophrenia undergoing primary TKA were identified within the Medicare claims database. The study group was randomly matched in a 1:5 ratio to controls according to age, sex, and medical comorbidities. The query yielded 49,176 patients with (n = 8,196) and without (n = 40,980) schizophrenia undergoing primary TKA. Primary outcomes analyzed included in-hospital LOS, 90-day readmission rates, 90-day medical complications, 2-year implant-related complications, in addition to day of surgery and 90-day costs of care. A P-value less than .01 was considered statistically significant. RESULTS Schizophrenia patients had longer in-hospital LOS (3.73 days vs 3.22 days, P < .0001) and had higher incidence and odds ratios (ORs) of readmission rates (18.26 vs 12.07%; OR: 1.58, P < .0001) compared to controls. Schizophrenia patients had higher incidence and odds of medical (3.23 vs 1.10%; OR: 2.99, P < .0001) and implant-related complications (5.92 vs 3.59%; OR: 1.68, P < .0001) and incurred significantly higher day of surgery ($13,300.58 vs $11,681.77, P < .0001) and 90-day costs of care ($18,222.18 vs $14,845.64, P < .0001). CONCLUSION This study demonstrates that patients with schizophrenia have longer in-hospital LOS, higher readmission rates, higher complications, and increased costs of care after primary TKA.
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Affiliation(s)
| | - Karim G Sabeh
- Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, MA
| | - Nipun Sodhi
- Department of Orthopaedic Surgery, Northwell Health, Lenox Hill Hospital, New York, NY
| | - Michael A Mont
- Department of Orthopaedic Surgery, Northwell Health, Lenox Hill Hospital, New York, NY; Department of Orthopaedic Surgery, Cleveland Clinic Hospital, Cleveland, OH
| | - Martin W Roche
- Orthopedic Research Institute, Holy Cross Hospital, Ft. Lauderdale, FL
| | - Victor H Hernandez
- Department of Orthopaedic Surgery, University of Miami Hospital, Miami, FL
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47
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Guder C, Gravius S, Burger C, Wirtz DC, Schildberg FA. Osteoimmunology: A Current Update of the Interplay Between Bone and the Immune System. Front Immunol 2020; 11:58. [PMID: 32082321 PMCID: PMC7004969 DOI: 10.3389/fimmu.2020.00058] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Accepted: 01/09/2020] [Indexed: 12/11/2022] Open
Abstract
Immunology, already a discipline in its own right, has become a major part of many different medical fields. However, its relationship to orthopedics and trauma surgery has unfortunately, and perhaps unjustly, been developing rather slowly. Discoveries in recent years have emphasized the immense breadth of communication and connection between both systems and, importantly, the highly promising therapeutic opportunities. Recent discoveries of factors originally assigned to the immune system have now also been shown to have a significant impact on bone health and disease, which has greatly changed how we approach treatment of bone pathologies. In case of bone fracture, immune cells, especially macrophages, are present throughout the whole healing process, assure defense against pathogens and discharge a complex variety of effectors to regulate bone modeling. In rheumatoid arthritis and osteoporosis, the immune system contributes to the formation of the pathological and chronic conditions. Fascinatingly, prosthesis failure is not at all solely a mechanical problem of improper strain but works in conjunction with an active contribution of the immune system as a reaction to irritant debris from material wear. Unraveling conjoined mechanisms of the immune and osseous systems heralds therapeutic possibilities for ailments of both. Contemplation of the bone as merely an unchanging support pillar is outdated and obsolete. Instead it is mandatory that this highly diverse network be incorporated in our understanding of the immune system and hematopoiesis.
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Affiliation(s)
- Christian Guder
- Clinic for Orthopedics and Trauma Surgery, University Hospital Bonn, Bonn, Germany
| | - Sascha Gravius
- Clinic for Orthopedics and Trauma Surgery, University Hospital Bonn, Bonn, Germany.,Department of Orthopedics and Trauma Surgery, University Medical Center Mannheim of University Heidelberg, Mannheim, Germany
| | - Christof Burger
- Clinic for Orthopedics and Trauma Surgery, University Hospital Bonn, Bonn, Germany
| | - Dieter C Wirtz
- Clinic for Orthopedics and Trauma Surgery, University Hospital Bonn, Bonn, Germany
| | - Frank A Schildberg
- Clinic for Orthopedics and Trauma Surgery, University Hospital Bonn, Bonn, Germany
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Goswami K, Parvizi J. Culture-negative periprosthetic joint infection: is there a diagnostic role for next-generation sequencing? Expert Rev Mol Diagn 2019; 20:269-272. [PMID: 31858850 DOI: 10.1080/14737159.2020.1707080] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Karan Goswami
- Rothman Orthopaedic Institute, Thomas Jefferson University, Philadelphia, PA, USA
| | - Javad Parvizi
- Rothman Orthopaedic Institute, Thomas Jefferson University, Philadelphia, PA, USA
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49
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Plasma Viscosity Has a Role in the Diagnosis of Prosthetic Joint Infection After Total Knee Arthroplasty. J Arthroplasty 2019; 34:3035-3039. [PMID: 31447253 DOI: 10.1016/j.arth.2019.07.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 07/06/2019] [Accepted: 07/24/2019] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND The diagnosis of prosthetic joint infection (PJI) is challenging because no single test has consistently demonstrated an adequate discriminative potential. The combination of erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) with adequate thresholds is well established. This study sought to investigate the role of plasma viscosity (PV) in the diagnosis of PJI following painful total knee arthroplasty. METHODS The medical notes, and hematological and microbiology results of 310 patients who underwent revision for a painful total knee arthroplasty were evaluated. Infection was confirmed using Musculoskeletal Infection Society criteria in 102 patients (32.9%), whereas 208 patients (67.1%) were classified as noninfected. Serum investigations including ESR, CRP, and PV were analyzed using receiver observer curves and optimal cutoff points identified. RESULTS There was a strong correlation between PV and both ESR and CRP. The area under curve was 0.814 for PV and 0.812 for ESR. Statistical analysis showed noninferiority of PV as compared to ESR in diagnosing PJI. A PV value of ≥ 1.81 mPa.s. had the best efficiency of 82.1%. Combining a CRP ≥ 13.5 mg/L with a PV ≥ 1.81 mPa.s. in a serial test approach yielded the highest specificity of 97.9% and positive likelihood ratio of 22.8. Sensitivity was 47.9% and a negative likelihood ratio of 0.53. CONCLUSION PV is noninferior to ESR in diagnosing PJI. Its use is justified in clinical practice. It is cheaper, quicker, more efficient, and not influenced by hematocrit levels or medication. In this cohort, a PV value ≥ 1.81 mPa.s. would be an adequate cutoff to diagnose PJI in combination with CRP ≥ 13.5 mg/L.
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50
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Shapiro SA, Arthurs JR, Heckman MG, Bestic JM, Kazmerchak SE, Diehl NN, Zubair AC, O’Connor MI. Quantitative T2 MRI Mapping and 12-Month Follow-up in a Randomized, Blinded, Placebo Controlled Trial of Bone Marrow Aspiration and Concentration for Osteoarthritis of the Knees. Cartilage 2019; 10:432-443. [PMID: 30160168 PMCID: PMC6755869 DOI: 10.1177/1947603518796142] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVE Bone marrow aspiration and concentration (BMAC) is becoming a more common regenerative therapy for musculoskeletal pathology. In our current pilot study, we studied patients with mild-to-moderate bilateral knee osteoarthritis, compared pain at 12-month follow-up between BMAC-injected and saline-injected knees, and examined cartilage appearance measured by magnetic resonance imaging (MRI) T2 quantitative mapping. DESIGN Twenty-five patients with mild-to-moderate bilateral osteoarthritic knee pain were randomized to receive BMAC into one knee and saline placebo into the other. Bone marrow was aspirated from the iliac crests, concentrated in an automated centrifuge, combined with platelet-poor plasma for knee injection, and compared with saline injection into the contralateral knee. Primary outcome measures were T2 MRI cartilage mapping at 6-month and Visual Analog Scale and Osteoarthritis Research Society International Intermittent and Constant Osteoarthritis Pain scores and radiographs at 12-month follow-up. RESULTS Constant, intermittent, and overall knee pain remained significantly decreased from baseline at 12-month follow-up (all P ⩽ 0.01), with no apparent difference between BMAC- and saline-treated knees (all P ⩾ 0.54). A similar significant increase from baseline to 12-month follow-up regarding quality of life was observed for both BMAC- and saline-treated knees (all P ⩽ 0.04). T2 quantitative MRI mapping showed no significant changes as a result of treatment. CONCLUSIONS BMAC is safe to perform and relieves pain from knee arthritis but showed no superiority to saline injection at 12-month follow-up. MRI cartilage sequences failed to show regenerative benefit with single BMAC injection. The mechanisms of action that led to pain relief remain unclear and warrant further studies.
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Affiliation(s)
- Shane A. Shapiro
- Department of Orthopedic Surgery, Mayo Clinic, Jacksonville, FL, USA,Shane A. Shapiro, Department of Orthopedic Surgery, Mayo Clinic, 4500 San Pablo Rd, Jacksonville, FL 32224, USA.
| | | | - Michael G. Heckman
- Division of Biomedical Statistics and Informatics, Mayo Clinic, Jacksonville, FL, USA
| | | | | | - Nancy N. Diehl
- Division of Biomedical Statistics and Informatics, Mayo Clinic, Jacksonville, FL, USA
| | - Abba C. Zubair
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Jacksonville, FL, USA
| | - Mary I. O’Connor
- Department of Orthopedic Surgery, Yale-New Haven Hospital, New Haven, CT, USA
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