Citations

Introduction No study to date has examined the association between organism profile and ideal interstage duration in patients undergoing two-stage exchange arthroplasty. The purpose of this study was to evaluate the impact of the type of infecting organism on the optimal timing of reimplantation in this patient population. Methods This retrospective study identified 576 patients with chronic periprosthetic joint infection (PJI) of the knee that underwent two-stage exchange arthroplasty with a minimum 1-year follow-up. PJI was defined using the 2013 Musculoskeletal Infection Society (MSIS) criteria. Patients with a time to reimplantation >180 days from resection arthroplasty (n=76) and those that underwent spacer exchange were excluded (n=49). Treatment failure was defined as any reoperation for infection or PJI-related mortality. Receiver operator characteristic (ROC) curve analyses were used to identify whether the optimal interstage duration differed by infecting organism. Multivariate regression analyses were performed to identify risk factors for failure. Results 451 patients with a mean follow-up time of 5.8 ± 3.6 years were included. Of these, 71 (15.7%) patients experienced failure and 380 (84.3%) experienced success. ROC curve analyses demonstrated that the optimal interstage duration was longest for patients infected with “high-virulence” pathogens (129 days), followed by those with MSSA (117 days), culture negative PJI (98 days), and coagulase-negative Staphylococci (86 days). After controlling for co-variates, regression analyses showed that an interstage duration above the identified cutoff for each pathogen group was a predictor of treatment failure (all p<0.05). Conclusion We found that the ideal interstage duration varied considerably by the type of infecting organism in patients undergoing two-stage exchange. Greater awareness of this data may help guide the optimal timing of reimplantation in this patient population.

Introduction The alpha-defensin test has witnessed a surge in popularity following reports of its superior diagnostic capabilities, when compared to more conventional synovial markers. Despite this, no study to date has evaluated the utility of alpha-defensin for the diagnosis of acute periprosthetic joint infection (PJI). The purpose of this multicenter study was to determine whether the alpha-defensin test provided additional clinical benefit, when compared to synovial white blood cell (WBC) count and polymorphonuclear leukocyte percentage (PMN%), in the diagnosis of acute postoperative PJI. Methods This retrospective study identified all patients who underwent arthrocentesis within 90 days of their primary total joint arthroplasty (TJA) at three institutions. PJI was defined as revision TJA for infection within 2-weeks of joint aspiration with >=1 positive intraoperative culture. Patients were considered aseptic if they had no reoperation for >=1-year after arthrocentesis. Receiver operator characteristic (ROC) curves were used to assess the utility of alpha-defensin, WBC count, and PMN% in the diagnosis of acute PJI. Pairwise comparison was performed to compare whether the area under the curve (AUC) was significantly different between the three markers. Results A total of 143 patients were included. Of these, 85 (59.4%) were infected and 58 (40.6%) were aseptic. After plotting ROC curves, WBC count was found to have the highest diagnostic utility (AUC 0.912, sensitivity 80.0%, specificity 91.2%), followed by PMN% (AUC 0.869, sensitivity 70.5%, specificity 93.0%), and alpha-defensin (AUC 0.812, sensitivity 62.4%, specificity 100%). Using pairwise comparison, the AUC for WBC count was found to be significantly higher than that of alpha-defensin (p=0.005). However, there was no difference in the AUC between alpha defensin and PMN% (p=0.154). Conclusion Based on our findings, it appears that alpha-defensin provides little to no additional clinical benefit in the diagnosis of acute PJI, when compared to synovial WBC count and PMN%.

Background: Diabetic patients experience carpal tunnel syndrome (CTS) at high rates, have increased symptom severity, and experience prolonged recovery after carpal tunnel release (CTR). This study assessed the association of glucagon-like peptide-1 receptor agonist (GLP-1) therapy with postoperative outcomes after CTR in type II diabetic patients with CTS. Methods: Using the PearlDiver database, 25 229 diabetic patients with CTS who underwent CTR and were prescribed GLP-1 therapy were identified and exact matched to 25 229 controls based on age, sex, Elixhauser comorbidity index, tobacco use, obesity, hypothyroidism, and body mass index where available. Demographic variables and comorbidities were compared between groups using Kruskal-Wallis analyses for continuous variables and chi-square tests for categorical variables. Bivariate logistic regression analysis was conducted for 90-day outcomes and 2-year CTR revision. Results: Patients on GLP-1 therapy had decreased risk of 90-day medical complications (odds ratio [OR] = 0.90; 95% confidence interval [CI], 0.84-0.96) and hospital readmission (OR = 0.85; 95% CI, 0.77-0.94) of 0.5% and 0.4%, respectively, compared with controls. No significant differences were found in 90-day surgical complications or 2-year revision rates between cohorts. There were no cases of aspiration pneumonia. The GLP-1 cohort had increased odds of higher 90-day total costs of care (OR = 2.42; 95% CI, 1.88-3.15). Conclusions: GLP-1 therapy is associated with reduced risk of 90-day medical complications and hospital readmission following CTR in diabetic patients, suggesting these medications may optimize comorbidity profiles via glucose control preoperatively. Future studies may examine whether GLP-1 therapy is associated with minimum clinically important difference in patient-reported outcome measures for CTS in diabetic patients.

Background: There has been minimal literature evaluating how a prior myocardial infraction (MI) influences outcomes after total knee arthroplasty (TKA). Thus, the purpose of this study was to evaluate how the timing, type, and treatment of MI prior to TKA affect postoperative cardiac complications, general medical complications, and surgical complications. Methods: A retrospective comparative study was conducted using a large insurance database. Patients undergoing primary TKA for osteoarthritis were included. Patients who had experienced MI within 2 years before TKA were identified and were matched 1:4 with patients who had not had such an MI on the basis of demographic variables and comorbidities. Patients who had a prior MI were stratified into 4 groups based on the timing of the MI: 0 to <6 months, 6 to <12 months, 12 to <18 months, and 18 to 24 months before TKA. The rates of postoperative cardiac, general medical, and surgical complications were compared between groups. Subanalyses on the prior MI type, treatment, and location were performed. Results: Prior MI was associated with increased risks of postoperative MI (odds ratio [OR], 3.97 [95% confidence interval (CI), 3.20 to 4.93]), heart failure (OR, 1.45 [95% CI, 1.24 to 1.75]), and 90-day mortality (OR, 2.15 [95% CI, 1.41 to 3.28]). The risk of postoperative MI was highest for those with MI within 6 months before TKA (OR, 6.86 [95% CI, 5.34 to 8.82]). Type-1 MI, ST-elevation MI (STEMI), non-ST-elevation MI (NSTEMI), and anterior and inferior MIs were linked to elevated postoperative MI and/or mortality risks, with timing closer to surgery further amplifying the risk. Percutaneous coronary intervention within 6 months before TKA also increased postoperative risks. Type-2 MI within 6 months before TKA was associated with an increased risk of periprosthetic joint infection compared with controls (OR, 4.23 [95% CI, 1.67 to 10.67]). Conclusions: Patients who had a prior MI, particularly within 6 months before TKA, had significantly elevated risks of postoperative MI, heart failure, and mortality. Outcomes varied by MI type, treatment, and location, with type-1 MIs and STEMIs increasing the postoperative mortality risk. Level of Evidence: Prognostic Level III . See Instructions for Authors for a complete description of levels of evidence.

Purpose To evaluate which patient factors are associated with specific metrics of poor access to care in patients with a rotator cuff tear (RCT). Methods The All of Us Database was utilized to form a cohort of patients with RCT between May 2018 and May 2023. Patients with a diagnosis of RCT using Systematized Nomenclature of Medicine clinical terms were included. The association of RCT diagnosis and patient‐specific factors on self‐reported outcomes of “delayed care,” “could not afford care,” “skipped medication,” and “have not seen provider in more than 1 year” were analyzed. Statistical tests performed were univariate regression and multivariable logistic regression. Results In total, 4,265 patients with RCT who completed the access to care survey were included. In the RCT cohort, 26.7% reported delayed care, 24.9% reported an inability to afford care, 12.1% reported skipped medications, and 1.7% reported not seeing a provider in more than 1 year. Multivariable analysis of patient treatment and demographic features revealed younger age, female sex, lower income, poor physical health, and poor mental health to be strongly associated with higher reported rates of delayed care, inability to afford care, and skipped medications. History of rotator cuff repair, marital status, and sexual orientation were not associated with reported poor access to care. Conclusions A quarter of patients with rotator cuff tears report delays in overall medical care and inability to afford care. Among patients diagnosed with RCT, patients of younger age, female sex, low income, and poor physical and mental health have higher odds of decreased access to health care. Clinical Relevance Health care disparities and access to care are topics that should be investigated to reduce them.

Background: Although it is well established that the type of organism can be a risk factor for failure in patients with periprosthetic joint infection (PJI), no study to date has examined the impact of the number of positive cultures on treatment outcomes in patients undergoing 2-stage exchange. The purpose of this multicenter study was to determine the prognostic utility of multiple positive cultures at resection as a predictor of failure following reimplantation. Methods: This retrospective multicenter study identified 437 patients with chronic knee PJI who had undergone 2-stage exchange arthroplasty with a minimum of 1 year of follow-up following reimplantation. PJI was defined with use of the 2013 Musculoskeletal Infection Society (MSIS) criteria. Patients with culture-negative PJI were excluded (n = 138). Treatment failure was defined as either any reoperation for infection or PJI-related mortality. Multivariable regression controlling for risk factors for failure after a 2-stage arthroplasty was performed to determine whether ≥2 positive intraoperative cultures at resection can predict outcomes following reimplantation when compared with a single positive culture. Results: Two hundred and ninety-nine patients were included. At a mean follow-up of 6.2 ± 2.6 years, 48 patients (16.1%) experienced failure. Patients who had a failure were more likely to have had a longer interstage interval (p = 0.038) and were also more likely to have had ≥2 positive cultures at the time of resection arthroplasty (95.8% versus 75.3%; p = 0.001). On regression analysis, ≥2 positive cultures at resection was the only variable that was identified as a risk factor for failure following reimplantation in both the univariate (odds ratio [OR], 7.55 [95% CI, 2.24 to 47.0]; p = 0.006) and multivariable models (OR, 8.12 [95% CI, 2.31 to 51.9]; p = 0.005). Conclusions: This is the first study to examine the impact of the number of positive cultures on outcomes in patients with PJI. We found that the presence of ≥2 positive cultures at resection was an indicator of a poor prognosis and resulted in a greater than eightfold increase in the risk of treatment failure in patients undergoing a 2-stage exchange. Level of Evidence: Prognostic Level III . See Instructions for Authors for a complete description of levels of evidence.

Purpose To compare the surgical outcomes of anterior cruciate ligament (ACL) reconstruction using hamstring autograft (HA) plus lateral extra‐articular tenodesis (LET), isolated all‐soft tissue quadriceps autograft (QA), and isolated HA. Methods A retrospective review was performed comparing high‐risk patients undergoing ACL reconstruction with isolated HA, isolated QA, or HA + LET from August 2013 to January 2023. High‐risk patients, as determined by high‐grade pivot shift or generalized ligament laxity, with at least a 2‐year follow‐up, were included. Lysholm and International Knee Documentation Committee scores were compared at 3, 6, 12, and 24 months postoperatively. Retear rate, postoperative pivot‐shift grade, return to sport, and complications were recorded. Results In total, 159 patients (56 HA, 47 HA + LET, and 56 QA) were included. At 6 months postoperatively, the HA International Knee Documentation Committee score was significantly lower than that of the HA + LET and QA groups ( P < .0001). Similarly, the Lysholm score was significantly lower in the HA cohort at 6 months, 1 year, and 2 years postoperatively ( P < .0001‐.02). There was no difference in the rate of achieving the minimally important clinical difference between the cohorts for either of these outcome scores. The retear rate was significantly higher in the HA group (17.9%) compared to the HA + LET (4.3%) and QA (1.8%) cohorts ( P = .01). The rate of postoperative pivot shift of grade 2 or more was also higher in the isolated HA group ( P = .04). Conclusions The use of an all‐soft tissue QA or HA + LET for ACL reconstruction resulted in a lower retear rate and postoperative pivot‐shift grade compared to an isolated HA graft in high‐risk patients at 2 years postoperatively. There was no difference in the rate of achieving the minimal clinically important difference between the cohorts. The QA and HA + LET reconstruction options may improve stability and decrease the failure rate compared with HA reconstruction alone. Level of Evidence Level III, retrospective cohort study.

Purpose To systematically review the existing literature on the functional performance of athletes at the time of return‐to‐sport (RTS) clearance after anterior cruciate ligament reconstruction (ACLR). Methods A systematic literature search of the MEDLINE, EMBASE, Scopus, and Web of Science databases was performed. The inclusion criteria were original research reports with study populations of athletes who had undergone ACLR and had undergone objective functional testing immediately after clearance to RTS. Functional testing was stratified by hop tests, strength tests, kinetic assessment, and kinematic assessment, and data were extracted from each study using a standardized template. Results Of the 937 unique studies identified, 46 met the inclusion criteria. The average time between ACLR and functional testing was 7.9 months among the included studies. In 10 of 17 studies, patients were found to have an average quadriceps strength limb symmetry index of less than 90%. However, only 2 of 12 studies found the average hop test limb symmetry index to be less than 90%. Kinematics included reduced knee flexion angle and increased trunk flexion on landing in ACLR patients compared with matched controls. On evaluation of kinetics, ACLR patients showed reduced peak vertical ground reaction force, lower peak knee extension and knee flexion moments, and altered energy absorption contribution compared with matched controls. Conclusions This systematic review suggests that athletes show functional deficits at the time of RTS at an average of 7.9 months after ACLR. Traditional functional tests, such as strength and hop tests, are not able to accurately identify patients who continue to show deficits. The most common biomechanical deficits that persist after RTS clearance include diminished peak knee extension moment, decreased knee flexion angle, increased trunk flexion angle, reduced vertical ground reaction force, and increased hamstring central activation ratio during various functional gait and landing tasks. Level of Evidence Level III, systematic review of Level I to III studies.

Background: Bibliometric citation analyses have been widely used in medicine to help researchers gain foundational knowledge about a topic and identify subtopics of popular interest for further investigations. Purpose: To identify the 50 most cited research publications related to American football. Study Design: Cross-sectional study. Methods: The Clarivate Analytics Web of Science database was used to generate a list of publications relating to football. Articles were filtered by the total number of citations, and the top 50 most cited articles studying the sport of football were selected for this analysis. Articles were analyzed by author, publication year, country of origin, institution affiliation, journal, article type, main research topic area, competitive level, and the level of evidence. A total of 247 articles were reviewed to reach the top 50 articles. Results: The most studied topic within the top 50 articles was concussion/chronic traumatic encephalopathy (n = 40). Collegiate football was the most studied level of competition (n = 25). The journal publishing the greatest number of top articles was Neurosurgery. Two institutions, the University of North Carolina at Chapel Hill and Boston University School of Medicine, produced over one-third of top 50 articles (n = 18). Conclusion: Our analysis indicated that most of the top 50 publications related to the sport of football focused on concussion and CTE, were observational, and were published during or after 2000. The most studied level of competition was collegiate football.