Journal of Shoulder and Elbow Surgery最新文献

Background: Chronic anterior shoulder instability affects a young and athletic population, with a high demand for functional recovery and return to sport. Arthroscopic Trillat dynamic stabilization technique has shown great results at 2 years in terms of stabilization and functional outcomes on general population. The hypothesis is that it could do so in at-risk for dislocation athletic population for stabilization and return to sport, with results comparable to the reference techniques.

Methods: Multicenter retrospective study of Walch-Duplay type 2, 3 and 4 at risk sports patients treated by arthroscopic Trillat for chronic anterior shoulder instability between January 2012 and January 2021, at a two years follow-up.

Primary endpoint: occurrence of dislocation recurrence. Secondary endpoints: subluxation recurrence, functional outcomes, time and level of return to sport, functional scores, bony fusion and complications.

Results: 74 patients were analyzed, with a mean age of 24.4 years (15-50). Sports level was, moderate risk of dislocation Walch-Duplay type 2 for n=34 (46%), medium risk Walch- Duplay type 3 for n=19 (26%) and high-risk Walch-Duplay type 4 for n=21 (28%). Recurrence of dislocation occurred in 3 patients (4.1%). 100% of patients returned to sport, with an average delay of 4.6 months, with n=56 (76%) returning to the same previous level. The mean Constant score was 94.5 (79-100), the Rowe score 94.7 (70-100), the Walch-Duplay score 90.2 (50-100) and the SSV score 90.5 (65-100). Subgroup analysis of athletes at moderate risk of dislocation recurrence (Walch-Duplay type 2) vs. medium and high risk of dislocation recurrence (Walch-Duplay type 3 and 4) revealed no statistically significant difference. One patient presented with asymptomatic pseudarthrosis.

Conclusion: Arthroscopic Trillat offers highly satisfactory results in the treatment of chronic anterior shoulder instability for athletes regardless of the type of sport practised and type of risk according to Walch-Duplay. This simple and quick technique enables a rapid return to sport and at the previous level in the majority of cases. After showing its effectiveness in the general population at two years, arthroscopic Trillat offers a reliable alternative to the reference procedures in young athletic patients.

Background: Alcohol consumption is a significant risk factor for both the occurrence and severity of rotator cuff tears. However, there is limited supporting evidence to suggest alcohol use is associated with suboptimal outcomes following operative repair of rotator cuff tears. Rat shoulders have been demonstrated as consistent and reliable models for studying rotator cuff disease.

Hypothesis/purpose: Perioperative alcohol exposure will negatively impact biomechanical and histologic properties of surgically repaired rotator cuffs in rats.

Methods: Rats were randomized to receive a 20% ethanol or isocaloric control solution as their primary source of drinking water. A tenotomy of the supraspinatus tendon from bone was performed surgically and then immediately repaired with a transosseous technique. Following surgery, rats were continued on the same exposure solution until animals were humanely euthanized at 7, 14, or 21 days postoperatively. The surgically-repaired shoulders underwent biomechanical testing to assess load to failure and failure strain. Histological evaluation of tendon-to-bone healing was performed by a blinded pathologist using a qualitative grading system. Quantitative reverse transcription-polymerase chain reaction (qRT-PCR) on total RNA from tendon-to-bone interface tissue was performed to quantify the mRNA expression of Type I & III collagen, and transforming growth factor-beta 1 (TGF-B1) & 3 (TGF-B3) at the repair site.

Results: Biomechanical testing showed that repaired shoulder constructs in rats exposed to ethanol had significantly lower load to failure at 7 days postop relative to repairs in rats exposed to a control solution. No other biomechanical parameters or time points reached statistical significance. TGF-B3 mRNA expression was found in significantly higher quantities at the repair sites of rats exposed to ethanol at 7 days postop relative to control rat repair sites. No other time points or factors reached statistical significance. No significant differences were identified amongst time points or groups at the healing tendon-to-bone interface.

Conclusion: Alcohol exposure significantly decreases biomechanical load to failure of rotator cuff repairs in the early postoperative period in rat models. In the later postoperative period, alcohol exposure was not associated with a decrease in biomechanical load to failure compared to controls. Additionally, rats exposed to ethanol have significantly higher TGF-B3 expression at repair sites on postoperative day 7. This data suggests that ethanol consumption does deleteriously affect rotator cuff and bone healing. Future study is needed to validate the clinical significance of these findings in humans.

Background: Authors have observed an association between cervical spine mobility and arm injury risk in baseball player; however, there is a need to assess the generalizability of cervical measurement data. Assessing the downstream of associations of cervical dysfunction on shoulder and elbow injuries can inform clinical interventions to help reduce future arm injuries. The purpose of this study was to assess the generalizability of neck range of motion measures as arm injury prognostic factors in professional baseball pitchers.

Methods: A prospective cohort of professional baseball pitchers in one Major League Baseball Organization was performed. Pitchers underwent pre-season neck range of motion including cervical flexion, extension, rotation, lateral flexion, and the flexion-rotation test (CFRT) and were followed for the season. The outcome was the occurrence of shoulder or elbow injury. A Cox proportional hazards analysis was performed and reported as hazard ratios (HR) with 95% confidence intervals (95% CI).

Results: A total of 88 pitchers were included (Age: 24.2 (2.4); Left-Handed: 21 (23%); Fastball Velocity: 92.3 (1.8)), with 15,942 athlete exposure days collected over the season. Pitcher neck range of motion was assessed (Flexion: 64 (10); Extension: 69 (11); Difference in Lateral Flexion: -1 (7); Difference in Neck Rotation: -2 (9); Difference in CFRT: -1 (7)). A total of 20 arm injuries (Shoulder: 9 (10%); Elbow: 11 (13%); Combined Rate: 1.3 (95% CI: 0.7, 1.7) per 1000 exposure days) were suffered by pitchers during the season. For every degree increase in the difference in dominant (rotating to dominant shoulder) versus non-dominant (rotating to non-dominant shoulder) neck rotation, there was a four-fold increase in arm injury hazard (HR: 4.0 (95% CI: 1.1, 13.9), p = 0.031). No other neck measurements demonstrated prognostic value.

Conclusions: A deficit in dominant versus non-dominant neck rotation was prognostic for pitching arm injury. However, the cervical rotation test did not have prognostic value in this sample. Further research is required to assess the generalizability and scalability of neck range of motion assessment in relation to baseball shoulder and elbow injuries across different competition levels.

Background: Tear size is a significant prognostic factor following rotator cuff repair. However, no study has investigated which dimension of the tear, the mediolateral (ML) or anteroposterior (AP), more significantly influences the outcome when the product of the 2 dimensions, the tear size area, is similar.

Methods: A retrospective cohort study was conducted with patients who underwent arthroscopic full-thickness rotator cuff tear (FTRCT) repair. Two contrasting groups were derived from preoperative tear dimensions. The ML dominant (MLD) group consisted of 45 FTRCTs with the ML tear dimension at least 1.5 times larger than the AP, and retraction exceeding the humeral head apex. The AP dominant (APD) group included 35 FTRCTs with an inverse proportion of the dimensions and retraction short of the humeral head apex. Demographic data, preoperative and postoperative magnetic resonance imaging, clinical scores, and strength were compared between the groups.

Results: The mean follow-up was 26.7 and 32.2 months in the MLD and APD groups, respectively. The tear size in area (MLD vs. APD, 521.0 vs. 523.4 mm², P = .960) and the discrepancy between ML and AP dimensions (2.0 vs. 1.9, P = .597) were similar. However, the MLD group demonstrated significant female predominance (P = .003), dominant arm involvement (P = .007), a higher incidence of pathologic subacromial spurs (P = .016), narrower acromiohumeral distance (P < .001), shorter residual tendon (P < .001), and advanced supraspinatus muscle atrophy (P = .005). Other baseline parameters were comparable between the groups. At the 1-year postoperative magnetic resonance imaging, the MLD group demonstrated a significantly lower retear rate (4.4% vs. 31.4%, P = .001). Nevertheless, clinical scores and strength at the last follow-up did not significantly differ.

Conclusion: In a similar tear size area, the greater AP width contributes more than the ML length in causing a retear. Female predominance, dominant arm involvement, subacromial spurs, shorter residual tendon, and supraspinatus muscle atrophy were more demonstrated in MLD tears. Surgeons should be aware that healing may be poor in APD tears despite less retraction.

Background: This study aimed to investigate the influence of curved short stem alignment within the proximal humerus on the clinical outcomes of reverse shoulder arthroplasty. We hypothesized that the varus/valgus alignment would yield clinical outcomes comparable to those of a neutral alignment.

Methods: We retrospectively reviewed 167 patients who underwent reverse shoulder arthroplasty using the Aequalis Ascend Flex implant between January 2017 and December 2021. The study categorized the patients into three groups based on the angle difference between the humeral axis and the stem axis: neutral group (GN, defined as within ±5 degrees), valgus group (GL), and varus group (GR). Functional outcomes were assessed using the visual analog scale pain score, subjective shoulder value, American Shoulder and Elbow Surgeons score, University of California Los Angeles shoulder score, and active range of motion. Routine radiographic evaluations were also conducted to assess the filling ratio and bone resorption.

Results: Among 138 patients, 89 were in the GN group, 37 (27%) in the GL group, and 12 (9%) in the GR group. The average degree of varus alignment was 6 (range from 5 to 7 degrees), while the average degree of valgus alignment was -7 (range from -8 to -5 degrees). According to our findings, the clinical outcomes did not exhibit significant differences between the three groups. Furthermore, the radiological outcomes showed no significant differences among the three groups.

Conclusions: Compared to neutral alignment, varus or valgus alignment of the humeral stem in reverse shoulder arthroplasty using a curved short stem does not significantly affect clinical outcomes.

Background: Knowledge regarding differences in the order of frequency of complications after reverse total shoulder arthroplasty (rTSA) between Asian and Western populations is limited. We therefore asked for (1) what is the order of frequency of complications after primary rTSA in the Korean population? (2) What are the rates of complication, reoperation, and revision, and clinical outcomes after index surgery?

Methods: We retrospectively reviewed the 299 consecutive cases who underwent primary rTSA with more than 1 year of follow-up over a period of 12 years. The mean age of the patients was 73.4 years (range, 58-88 years) and the mean follow-up period was 3.8 years (range, 1-11.5 years). Evaluation of the clinical outcomes, complications, and reinterventions was performed at the final follow-up.

Results: The mean visual analog scale pain score, University of California at Los Angeles score, American Shoulder and Elbow Surgeons score, and subjective shoulder value improved from 6.7, 10.2, 30.7, and 27.7% before rTSA to 1.4, 26.4, 80.5, 77.2% after rTSA, respectively (P < .001). Overall, 45 complications (15.1%) were observed in 44 patients. The order of frequency of complications was as follows: 16 cases of scapular stress fracture (5.4%), 9 intraoperative or postoperative periprosthetic fracture (3.0%), 6 brachial plexus injury (2.0%), 4 instability (1.3%), 2 glenoid loosening (0.7%), 2 glenoid disassembly (0.7%), 2 periprosthetic joint infection (0.7%), 1 glenoid fixation failure (0.3%), 1 humeral stem fixation failure (0.3%), 1 hematoma (0.3%), and 1 complex regional pain syndrome (0.3%). Reintervention was performed in 15 cases (5.0%) including reoperation (8 cases; 2.7%) and revision surgery (7 cases; 2.3%).

Conclusion: At a mean follow-up period of 3.8 years, primary rTSA showed satisfactory clinical outcomes with a complication rate of 15.1%, a reoperation rate of 2.7%, and a revision rate of 2.3%. Scapular stress fracture appears to be the most common complication after rTSA in the Korean population.

Background: Shoulder arthroplasty revision is associated with a high prevalence of prosthetic infection, and diagnosis remains difficult. The primary aim of the study was to determine the diagnostic accuracy of percutaneous synovial biopsy (PSB) and joint aspiration compared with open culture results in detecting infection in revision shoulder arthroplasty. The second aim was to determine whether biopsy location within the shoulder was associated with culture status.

Methods: This was a multicenter prospective cohort study involving 4 sites and 69 patients undergoing revision shoulder arthroplasty. The cohort was 57% female with a mean age of 64 years. Preoperative fluoroscopic-guided PSBs and aspirations were carried out by a musculoskeletal radiologist before revision shoulder arthroplasty. The original prostheses consisted of hemiarthroplasties, total shoulder arthroplasties (TSAs), resurfacing TSA, reverse shoulder arthroplasties (RSAs), and antibiotic spacers. Six synovial tissue biopsies from separate regions in the shoulder were obtained both preoperatively and intraoperatively. The shoulder joint was aspirated, and synovial fluid collected, if available. Infection was considered positive in the setting of 2 or more matching positive cultures. The PSB cultures were considered "true positive" if the PSB cultures matched the open biopsy cultures.

Results: Nineteen percent had positive infection based on PSB, and 23% had confirmed culture-positive infections based on intraoperative biopsy. The diagnostic accuracy of PSB compared with open biopsy was as follows: sensitivity 0.37 (95% confidence interval [CI] 0.13-0.61), specificity 0.81 (95% CI 0.7-0.91), positive predictive value 0.37 (95% CI 0.13-0.61), negative predictive value 0.81 (95% CI 0.70-0.91), positive likelihood ratio 1.98, and negative likelihood ratio 0.77. Of the 71 patients from whom aspirates were collected, aspiration yielded synovial fluid in 33 patients. Preoperative aspiration detected no infections confirmed positive by open biopsy and correctly identified 81% of absent infections. The diagnostic accuracy of aspiration compared with open biopsy was as follows: sensitivity 0%, specificity 0.81 (95% CI 0.66-0.96), positive predictive value 0%, and negative predictive value 0.78 (95% CI 0.63-0.93). Biopsy location within the shoulder was not associated with infection status.

Discussion: Preoperative aspiration detected none of the infections proven positive via open biopsy. Although PSB was superior to synovial fluid aspirate, poor likelihood ratios suggest that PSB is not useful as an isolated test in the preoperative workup of the potentially infected patient. Biopsy location was not associated with culture status suggesting that the capsule is uniformly infected, and the location of tissue biopsies does not appear to matter.

Introduction: Utilization of total shoulder arthroplasty (TSA) in the United States has increased substantially within the last two decades and this trend is expected to continue. As TSA volume has continued to increase, healthcare policy has shifted towards an emphasis on value-based care. Therefore, it is important to understand variables that may increase TSA costs, including readmission rates. Patients discharged to home healthcare (HHC) or post-acute care (PAC) facilities have demonstrated increased readmission rates following TSA. However, few studies have directly compared HHC to PAC facilities and routine home discharge while accounting for pertinent demographics. The purpose of this study was to compare 180-day readmission rates between routine home discharge, HHC, and PAC facility groups following primary TSA.

Methods: The Nationwide Readmissions Database was queried from 2010 to 2020 to identify all patients that underwent primary TSA. Readmission rates were compared between routine home discharge, HHC, and PAC facility groups. Binary logistic regression identified independent risk factors for readmission within 180 days.

Results: From 2010 to 2020 a total of 171,898 patients underwent TSA. 71% were routinely discharged home, 21% were discharged to HHC, and 8% were discharged to a PAC facility. After adjusting for income, insurance, obesity status, age, Charlson Comorbidity index, and gender, discharge to a PAC facility was independently predictive of readmission within 180 days following TSA (OR: 1.69, 95% CI 1.59-1.79, p<0.001).

Conclusion: Patients discharged to a PAC facility after TSA had higher readmission rates compared to HHC and routine home discharge that persisted even after controlling for relevant demographics. Clinicians should be cognizant of the risks and benefits of different discharge methods and consider home discharges for suitable candidates. Understanding risk factors that increase healthcare expenditures has significant utility for institutions in the era of bundled care. However, it is important that alternative payment models do not disincentivize orthopedic surgeons from providing care to medically complex patients.

Background: Glenoid version is a critical anatomic parameter relied upon by many surgeons to inform preoperative planning for shoulder arthroplasty. Advancements in imaging technology have prompted measurements of glenoid version on various imaging modalities with different techniques. However, discrepancies in how glenoid version is measured within the literature have not been well characterized.

Methods: A literature search was performed by querying PubMed, EMBASE, CINAHL, and Cochrane computerized databases from their inception through December 2023 to identify studies that assessed the relationship between preoperative glenoid version and at least one clinical or radiologic outcome following shoulder arthroplasty. Study quality was assessed via the Methodological Index for Non-Randomized Studies criteria. Imaging modalities and techniques for measuring glenoid version, along with their association with clinical outcomes, were aggregated.

Results: Among 61 studies encompassing 17,070 shoulder arthroplasties, 27 studies (44.3%) described explicitly how glenoid version was measured. The most common imaging modality to assess preoperative glenoid version was computed tomography (CT) (63.9%), followed by radiography (23%); 11.5% of studies used a combination of imaging modalities within their study cohort. Among the studies using CT, 56.5% utilized two-dimensional (2D) CT, 41.3% utilized three-dimensional (3D) CT, and 2.2% used a combination of 2D and 3D CT. The use of 3D CT increased from 12.5% of studies in 2012-2014 to 25% of studies in 2018-2020 to 52% of studies in 2021-2023 (p_trend=0.02). Forty-three (70.5%) studies measured postoperative version, most commonly on axillary radiograph (22 [51.2%]); 34.9% of these studies used different imaging modalities to assess pre- and postoperative version.

Conclusions: This systematic review revealed marked discrepancies in how glenoid version was measured and reported in studies pertaining to shoulder arthroplasty. A temporal trend of increased utilization of 3D CT scans and commercial preoperative planning software was identified. Improved standardization of the imaging modality and technique for measuring glenoid version will enable more rigorous evaluation of its impact on clinical outcomes.

Background: The Hospital Frailty Risk Score (HFRS) has demonstrated strong correlation with adverse outcomes in various joint replacement surgeries, yet its applicability in total elbow arthroplasty (TEA) remains unexplored. The purpose of this study is to assess the association between HFRS and postoperative complications following elective primary TEA.

Methods: The Nationwide Readmissions Database was queried to identify patients undergoing primary TEA from 2016 to 2020. The HFRS was used to compare medical, surgical, and clinical outcomes of frail vs. non-frail patients. Mean and relative costs, total hospital length of stay (LOS), and discharge disposition for frail and non-frail patients were also compared.

Results: We identified 2,049 primary TEA in frail patients and 3,693 in non-frail patients. Frail patients had increased complication rates including acute respiratory failure (13.6% vs. 1.1%; p < 0.001), urinary tract infections (12.3% vs. 0.0%; p < 0.001), transfusions (3.9% vs. 1.1%; p < 0.001), pneumonia (1.1% vs. 0.2%; p < 0.001), acute respiratory distress syndrome (3.2% vs 0.6%; p < 0.001), sepsis (0.7% vs. 0.1%; p < 0.001), and hardware failure (1.2% vs 0.1%; p < 0.001). Frail patients also experienced higher rates of readmission (37% vs. 25%; p < 0.001) and death (1.7% vs. 0.2%; p < 0.001), while being less likely to undergo revision (6.5% vs. 17%; p < 0.001). Frail patients incurred higher healthcare costs ($28,497 vs. $23,377; p < 0.001) and longer LOS (5.3 days vs. 2.6 days; p < 0.001), with reduced likelihood of routine hospital stays (36% vs. 71%; p < 0.001) and increased utilization of short-term hospitalization (p < 0.001), care facilities (p < 0.001), and home health care services (p < 0.001).

Conclusion: HFRS is a validated indicator of frailty and is strongly associated with increased rates of complications in patients undergoing elective primary TEA. These findings should be considered by orthopedic surgeons when assessing surgical candidacy and discussing treatment options in this at-risk patient population.