Journal of Knee Surgery最新文献

{"title":"Survivorship of Primary NexGen Knee Replacement: Comparing Cementless Trabecular Metal to Other Designs of Tibial Component.","authors":"Ayooluwa S Ayoola, Michael A Charters, Hamza M Raja, Luke Weseman, Peter L Lewis, Yi Peng, Wayne Trevor North","doi":"10.1055/a-2376-6889","DOIUrl":"10.1055/a-2376-6889","url":null,"abstract":"<p><p>The impact of cementless trabecular metal (TM) implants on implant survivorship are not well delineated. This study compares primary total knee arthroplasty (TKA) revision rates of cemented knee replacements with two cementless knee replacement designs-cementless TM and a non-TM cementless design. Data from a national registry queried TKA procedures performed for osteoarthritis from 1999 to 2020. The risk of revision of Zimmer NexGen TKA using cementless TM, cementless non-TM, and cemented non-TM were compared. Analyses included Kaplan-Meier estimates of survivorship and Cox hazard ratios (HR), stratified by age and gender. Cementless TM components had higher risks of revision compared with cementless non-TM implants (HR = 1.49; <i>p</i> ≤ 0.001). Cementless TM implants showed higher risks of revision compared with cemented non-TM prostheses for the first 2 years (HR = 1.75, <i>p</i> < 0.001). Non-TM prostheses posed equal risk of revision for cementless and cemented fixations (HR = 0.95, <i>p</i> = 0.522). Patients aged 55 to 64 years and 65 to 74 years had a higher risk of revision for cementless TM compared with cementless non-TM (HR = 1.40, <i>p</i> = 0.033 and HR = 1.79, <i>p</i> < 0.001, respectively) and cemented non-TM implants (HR = 1.51, <i>p</i> < 0.001 and HR = 1.54, <i>p</i> < 0.001, respectively). The study shows there is an increased risk of revision with TM cementless implants for patients aged 55 to 74 years. These results do not support the use of TM tibial implants for patients of this age group for primary TKA.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141861272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of Joint Laxity on 2-Year KOOS Outcomes of Posterior Stabilized Total Knee Arthroplasty.","authors":"Amber L Randall, Edgar A Wakelin, James Kah, John M Keggi, Jan A Koenig, Jeffrey H DeClaire, Corey E Ponder, Jeffrey M Lawrence, Christopher Plaskos","doi":"10.1055/a-2376-7085","DOIUrl":"10.1055/a-2376-7085","url":null,"abstract":"<p><p>The objective of this study was to determine relationships between intraoperative posterior cruciate ligament (PCL) sacrificing posterior stabilized (PS) total knee arthroplasty (TKA) laxity measurements throughout flexion and patient outcomes at 2 years post-TKA and to define clinically relevant laxity thresholds to optimize patient outcomes.In a single-surgeon study, PCL sacrificing TKA using a robotics-assisted platform with a digital joint tensioning device was performed in 115 knees in 115 patients. Final intraoperative joint laxity was recorded, and 2-year Knee Injury and Osteoarthritis Outcome Scores (KOOSs) were obtained. A Simulated Annealing optimization algorithm was used to identify medial and lateral laxity windows which maximized the 2-year KOOS pain score. Wilcoxon nonparametric tests were used to compare outcomes between groups.Significant associations were found between intraoperative joint laxity and 2-year KOOS pain outcomes throughout flexion. Clinically relevant laxity windows were defined medially and laterally in mid-flexion and flexion for improved outcomes, whereas only a lateral laxity window could be defined in extension. When all laxity windows were satisfied, a 14.5-KOOS point improvement was found (97.2 vs. 77.8, <i>p</i> = 0.0060) compared to knees which did not satisfy any window. Improvements in Activities of Daily Living (Δ8.8, <i>p</i> = 0.0143), Sports (Δ22.5, <i>p</i> = 0.0108), and Quality of Life (Δ18.7, <i>p</i> = 0.0011) KOOS subscores were also found in knees which satisfied all windows versus 0-1 window.Intraoperative joint laxity is associated with postoperative outcomes in a PS knee design, wherein patients balanced within identified laxity targets reported improved outcomes over those that did not. Clinically significant thresholds were defined and were predominately found in mid-flexion and flexion for medial and lateral laxity. When target windows were combined further improved outcomes were identified.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141861269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Articular Cartilage Damage in the Patellofemoral Compartment at ACL Reconstruction Predicts Poor Postoperative Subjective Outcomes in Patients Age 40 and Older.","authors":"Ayato Miyamoto, Atsuo Nakamae, Kazuhiro Tsukisaka, Masataka Deie, Eisaku Fujimoto, Yoshinori Soda, Ryo Shimizu, Nobuo Adachi","doi":"10.1055/a-2368-3739","DOIUrl":"10.1055/a-2368-3739","url":null,"abstract":"<p><p>The purpose of this study was to investigate factors that influence clinical outcomes after anterior cruciate ligament (ACL) reconstruction in patients aged ≥40 years. We studied 264 patients aged ≥40 and 154 patients aged ≤20 years who underwent ACL reconstruction at several surgical centers. A logistic regression analysis was conducted to identify factors that influenced the Knee Injury and Osteoarthritis Outcome Score (KOOS) at 1 year post-ACL reconstruction. In the older patient group, cartilage damage in the patellofemoral compartment at surgery was a significant risk factor for poor postoperative KOOS subscores (pain, activities of daily living [ADL], sports, and quality of life [QOL]). Articular cartilage damage in the lateral compartment also significantly influenced one of the postoperative KOOS subscores (symptoms). In the younger patient group, articular cartilage damage in any compartments did not influence the postoperative KOOS subscores; only two preoperative KOOS subscores (symptoms and QOL) significantly influenced their postoperative KOOS subscores. We concluded that the articular cartilage damage in the patellofemoral compartment at ACL reconstruction predicts poor KOOS subscores at the 1-year follow-up in patients aged ≥40 years. STUDY DESIGN:  Cohort study (Prevalence); Level of evidence, 2.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141635067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Survey Results Concerning Current Trends in Meniscus Repair Indications and Preferences from Members of the Pediatric Research in Sports Medicine (PRiSM) Society.","authors":"J Lee Pace, John A Schlechter, Brian Haus, Rong Huang","doi":"10.1055/a-2368-4049","DOIUrl":"10.1055/a-2368-4049","url":null,"abstract":"<p><p>Meniscus repair has increased in frequency, especially among surgeons who focus on youth sports injuries. The aim of this study was to determine current trends in meniscus repair among a specific subset of meniscus repair surgeons. A cross-sectional survey utilizing several clinical vignettes was administered to orthopaedic surgeon members of the Pediatric Research in Sports Medicine (PRiSM) Society to investigate surgeon experience and training, number of meniscus repair procedures performed, and surgical and rehabilitation preferences. A statistical analysis of the responses was performed to determine associations between years in practice or type of fellowship training and the number of meniscus repair procedures performed, surgical indications, and rehabilitation preferences. The response rate to various questions ranged from 61.5 (59/96) to 63.5% (61/96). In all vignettes, a majority favored repair as well as some degree of weight-bearing and range-of-motion restrictions. Surgeons who had been in practice for 6 to 10 years performed significantly more meniscus repairs per year than those who had been in practice for greater than 20 years (<i>p</i> = 0.009) and those who had been in practice for 0 to 5 years (<i>p</i> = 0.05). Surgeons who had been in practice for greater than 20 years performed a significantly higher percentage of meniscectomies relative to meniscus repairs, compared with those in practice for 0 to 5 years (<i>p</i> = 0.002) or 6 to 10 years (<i>p</i> = 0.0003). When surgeons were grouped into those with less than 10 years of experience and those with greater than 10 years of experience, the former group performed a significantly higher number of meniscus repairs relative to meniscectomies than the latter group of surgeons (<i>p</i> < 0.0001). Less experienced surgeons are more likely to perform meniscus repair than meniscectomy, but all surgeons surveyed had a general preference for repair in all clinical vignettes. Repair technique preferences as well as rehabilitation protocols varied widely among surgeons.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141635070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interatrial Wall Abnormality is Associated with Adverse Same-Admission Outcomes Following Total Knee Arthroplasty.","authors":"Bruce B Zhang, Abdullah A Uddin, David H Mai, Declan Tozzi, Adam J Wolfert, Qais Naziri","doi":"10.1055/a-2376-6810","DOIUrl":"10.1055/a-2376-6810","url":null,"abstract":"<p><p>Total knee arthroplasty (TKA) is the most common joint arthroplasty procedure and is shown to be a reliable and efficacious way to improve quality of life. Individuals with interatrial wall abnormalities (IAWAs), such as atrial septal defect or patent foramen ovale (PFO), are at increased baseline risk for stroke and overall lifetime morbidity. The purpose of our study was to elucidate the association between IAWAs and perioperative TKA outcomes.We performed a retrospective cohort study utilizing the Healthcare Cost and Utilization Project National Inpatient Sample database. Admissions for TKA between 2010 and 2019 were identified using the international classification of disease (ICD)-9 and ICD-10 procedure codes. Patients with ICD-9-clinical modification (CM) diagnosis code 7455 or ICD-10-CM diagnosis code Q211 were assigned to the IAWA cohort, the primary exposure. Confounding variables included basic demographics, baseline health status, and surgical facility characteristics. The primary outcomes studied were medical complications, implant-related complications, and admission mortality. Univariate and adjusted multivariable regression analyses were used to identify associations.Compared to patients in the non-IAWA cohort, those in the IAWA cohort had significant risks for same-admission medical complications (odds ratio [OR] 5.77, 95% confidence interval [CI] 4.59-7.15; <i>p</i> < 0.001), implant-related complications (OR 1.55, 95% CI 1.09-2.12; <i>p</i> = 0.009), stroke (OR 77.46, 95% CI 58.4-101.2; <i>p</i> < 0.001), venous thromboembolism (VTE; OR 3.78 95% CI 2.47-5.51; <i>p</i> < 0.001), and mortality (OR 8.36, 95% CI 3.54-16.52; <i>p</i> < 0.001) following TKA.Compared to patients without IAWAs, those with IAWAs who undergo TKA have higher risks for same-admission medical and implant-related complications as well as same-admission mortality. Similarly, these patients have higher risks for same-admission stroke and VTE. Further research on perioperative TKA management in patients with IAWAs is needed.Level of Evidence is III: retrospective cohort study.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141861270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Traditional Intramedullary Axis Underestimates the Medial Tibial Slope Compared to Transmalleolar Sagittal Axis in Image-based Robotic-Assisted Unicompartimental Knee Arthroplasty.","authors":"Mattia Chirico, Luigi Zanna, Mustafa Akkaya, Christian Carulli, Roberto Civinini, Matteo Innocenti","doi":"10.1055/a-2376-6999","DOIUrl":"10.1055/a-2376-6999","url":null,"abstract":"<p><p>The medial unicompartmental knee arthroplasty (mUKA) has been recognized as an excellent treatment for medial knee osteoarthritis. The posterior tibial slope (PTS) is measured radiographically with the intramedullary axis (IMA) to the tibial baseplate on the sagittal plane radiograph. However, in most computer-navigated or robotic mUKAs, the PTS is set from a transmalleolar axis (TMA).The PTS difference was evaluatedbetween the sagittal TMA and the sagittal IMA of patients undergoing a CT-based primary robotic-assisted mUKA.We retrospectively reviewed the preoperative computed tomography (CT) scans taken according to the MAKO system protocol (Stryker) of 67 patients undergoing mUKAs. We measured the angular difference between the IMA and the TMA in the sagittal plane.Using the TMA to set the PTS the estimation of the slope of the medial tibial plateau would increase by an average of 1.9 ± 3.2 degreescompared to the IMA. Furthermore, in nineknees, PTS was decreased.Tibial components implanted with the help of a CT scan-based preoperative planning MAKO will show an average of 1.9 degrees more than those measured on sagittal radiographs potentially of concern for knee kinematics. A universal language is needed to standardize the slope calculation and the respective reference axis used.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141861273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Risk of Anterior Cruciate Ligament Tears in National Football League Players by Short, Normal, or Long Rest Weeks.","authors":"Ashwin R Garlapaty, Joshua A Scheiderer, Kylee Rucinski, Steven F DeFroda","doi":"10.1055/a-2428-0119","DOIUrl":"10.1055/a-2428-0119","url":null,"abstract":"<p><p>Anterior cruciate ligament (ACL) tears in National Football League (NFL) players are devastating injuries that take nearly a year to recover. Players that do return to sport have worse overall performance compared to pre-ACL tear. NFL players typically play regular season games on Sunday with the next game played on the following Sunday, allowing for 6 days between games. Deviation from the usual 6-day rest week has been proposed as a potential risk for ACL tear. The main objective of this study was to evaluate the risk of decreased rest or increased rest on ACL tear rates in NFL players. ACL injury data of NFL players from the 2012 to 2013 season and 2022 to 2023 season were gathered from publicly available sources. Player demographic data, position, age at time of injury, seasons played, injury mechanism, and playing surface type were recorded. Injuries were characterized as short, normal, or long week injuries. ACL tears that occurred during the preseason, postseason, or during week 1 were excluded. Descriptive statistics were calculated to report means, ranges, and percentages. Data were analyzed to determine statistically significant differences using Fisher's exact, chi-square, or one-way analysis of variance tests. A total of 524 ACL tears were recorded in NFL players during the study window. Note that 304 ACL tears were excluded and 220 fit inclusion criteria. Twenty-four ACL tears occurred during short weeks, 68 during long weeks, and 128 during normal weeks. Players were 1.8 times more likely to tear their ACL during a long week compared to a normal week (<i>p</i> < 0.001), and 1.5 times more likely to tear their ACL during a short week compared to a normal week (<i>p</i> = 0.02). The findings from this study suggest that deviation from the normal 7-day NFL week increases the risk of an ACL tear in NFL players when increasing or decreasing rest time. Further research exploring the impact of short and long rest times on player injury risk should be conducted to prevent season-ending injuries.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142367101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Tibial Tunnel Size Relative to the Proximal Tibia Affects the Tibial Tunnel Widening in Anatomical Anterior Cruciate Ligament Reconstruction.","authors":"Ryo Murakami, Shuji Taketomi, Ryota Yamagami, Kenichi Kono, Kohei Kawaguchi, Tomofumi Kage, Takahiro Arakawa, Takashi Kobayashi, Sakae Tanaka","doi":"10.1055/s-0044-1792021","DOIUrl":"https://doi.org/10.1055/s-0044-1792021","url":null,"abstract":"<p><p>The impact of the bone tunnel size relative to body size on clinical results in anterior cruciate ligament (ACL) reconstruction remains unclear. This study aimed to assess the morphological alteration of the tibial tunnel aperture and relationship between the tibial tunnel size relative to the proximal tibia among the tibial tunnel widening (TW) and clinical results following ACL reconstruction. This study comprised 131 patients who had undergone anatomical ACL reconstruction utilizing bone-patellar tendon-bone autografts. The morphology and enlargement of the tibial tunnel were examined via three-dimensional computed tomography 1 week and 1 year postoperatively. The anteroposterior (AP) and mediolateral (ML) positions were determined as a percentage relative to the proximal AP and ML tibial dimensions, respectively. Clinical assessment was conducted 2 years postoperatively. The association between the primary tibial tunnel size among TW and clinical outcomes was examined. The tibial tunnel significantly migrated posterolaterally. The ML diameter significantly widened; however, the AP diameter did not exhibit widening. AP widening was associated with the AP diameter of the primary tibial tunnel (<i>r</i> = -0.482, <i>p</i> < 0.01), and ML widening correlated with the ML diameter of that tunnel (<i>r</i> = -0.478, <i>p</i> < 0.01). However, there was no significant correlation observed between the primary tibial tunnel size and clinical outcomes. The tibial tunnel migrated and enlarged laterally in the ML plane, but did not enlarge in the AP plane. The primary tibial tunnel diameter relative to the proximal tibia negatively correlated with the tibial TW in the AP and ML planes. Level of evidence: level IV.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142576662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lower Blood Loss with Bicruciate-Retaining Total Knee Arthroplasty Compared with Bicruciate-Stabilized Total Knee Arthroplasty.","authors":"Takashi Kozu, Takanori Iriuchishima, Keinosuke Ryu, Kazuyoshi Nakanishi","doi":"10.1055/a-2428-1293","DOIUrl":"10.1055/a-2428-1293","url":null,"abstract":"<p><p>Total knee arthroplasty (TKA) is a common surgical procedure to treat end-stage knee osteoarthritis. This study compared blood loss volume and other clinical outcomes between bicruciate-retaining (BCR) and bicruciate-stabilized (BCS) TKA. Ninety-seven participants who underwent unilateral TKA were enrolled. The BCS-TKA and BCR-TKA groups comprised 78 and 19 participants, respectively. Blood loss was calculated using preoperative and postoperative hematocrit values, height, weight, and sex. Measurements were taken immediately after surgery, on days 1 and 7, and total blood loss was calculated up to day 7. Operation time, range of motion at 7 and 14 days postoperatively, blood transfusion requirement, and postoperative complications such as infection, hematoma, and deep vein thrombosis were compared between the groups. Blood loss was comparable between groups at all time points (125.7 vs. 105.4 mL, 57.9 vs. 43.5 mL, and 68.2 vs. 41.7 mL for immediate, day 1, and day 7 postoperatively, respectively; all <i>p</i> > 0.05) except for total blood loss, which was significantly lower in the BCR group compared with the BCS group (190.7 vs. 251.1 mL; <i>p</i> < 0.05). The BCR group also had a longer operation time than the BCS group (131.2 vs. 112.4 minutes; <i>p</i> < 0.05). No other significant differences were observed in other outcomes. Total blood loss up to 7 days postoperatively was significantly lower in the BCR group than in the BCS group despite a longer operation time. This may be attributed to the reduced bone resection and greater soft tissue preservation, including the anterior cruciate and posterior cruciate ligaments, in the BCR technique.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142367099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distinct Care Needs and Episodes of Care: Comparing Medical versus Orthopaedic Readmissions after Elective Primary Total Knee Arthroplasty.","authors":"Oguz Turan, Michael S Ramos, Ignacio Pasqualini, Nicolas S Piuzzi","doi":"10.1055/s-0044-1792019","DOIUrl":"https://doi.org/10.1055/s-0044-1792019","url":null,"abstract":"<p><p>Hospital readmissions after primary total knee arthroplasty (TKA) significantly drive health care expenditure and resource utilization. Recent studies have suggested differences between medical and orthopaedic readmissions after TKA and their episodes of care (EOCs) but lack patient-level data reporting. This study aimed to compare EOCs for medical and orthopaedic-related readmissions regarding initial readmission wards, services consulted, intensive care unit (ICU) admissions, blood transfusions, surgical interventions, length of stay, and discharge disposition.All patients enrolled in a prospective data collection system at a tertiary medical center undergoing elective, unilateral, primary TKA from 2016 to 2020 and readmitted within 90 days of discharge were included. Readmissions were categorized as related to medical or orthopaedic causes. Patients' electronic medical records were reviewed to collect demographic and clinical information about EOC associated with the readmission hospital course.In total, 82.4% (580/704) of 90-day readmissions after elective, primary TKA were related to medical causes, with the remaining 17.6% (124/704) of readmissions due to orthopaedic causes. Medical readmissions most often pertained to gastrointestinal complaints, while wound complications accounted for most orthopaedic readmissions. Most readmissions (63.1%, 444/704) occurred within the first 30 days after TKA. Patients with medical and orthopaedic readmissions had differences in EOC, such that more medical readmissions required ICU care (10.6 vs. 1.6%, <i>p</i> < 0.001), and more patients with orthopaedic readmissions needed a surgical intervention (65.4 vs. 6.7%, <i>p</i> < 0.001).By understanding differences in EOC for medical and orthopaedic readmissions after TKA, targeted initiatives can be developed to deliver more efficient, cost-effective orthopaedic surgical care, as the orthopaedic surgical community continues to provide value-based care.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142576645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}