Posterior Glenoid Bone Block Reconstruction: Indications, Techniques, and Outcomes.

Posterior shoulder instability is of particular therapeutic interest, as it typically affects patients with high functional demands such as young athletes and active adults. Although posterior capsulolabral repair has high return-to-sport rates, it is associated with recurrent instability of up to 11%. Posterior glenoid bone loss and significant glenoid retroversion have been identified as risk factors for recurrent instability and failure after primary arthroscopic soft-tissue repair. Therefore, posterior glenoid bone block reconstruction may be indicated for glenoid bone loss 20% or greater (as measured by the perfect circle technique) or greater than 10% in the setting of pathologic glenoid, failed primary posterior labral repair, incompetent posterior capsular tissue, or significant risk factors for failure of soft-tissue repair. This procedure may be performed arthroscopically or with a posterior open approach using distal tibial allograft, iliac crest autograft, or scapular spine autograft. Although short-term to midterm outcomes have been promising, there remain concerns regarding long-term outcomes, with potentially high rates of late recurrence, revision, and secondary osteoarthritis.

The role of body mass index in survivorship and clinical outcomes in total shoulder arthroplasty.

BACKGROUND: Increased body mass index (BMI) is a potential risk factor for poorer outcomes and complications. However, the influence of BMI on the long-term outcomes of anatomic total shoulder arthroplasty (aTSA) and reverse total shoulder arthroplasty (rTSA) remains to be fully elucidated. METHODS: Institutional records were queried to identify patients who underwent primary total shoulder arthroplasty (TSA) between 2009 and 2020 with a minimum of 2 years of clinical follow-up. Retrospective review was performed to collect demographic characteristics; comorbidity status; and range-of-motion and strength measurements in forward elevation, external rotation, and internal rotation. Patients were contacted by telephone to provide patient-reported outcomes (PROs). Patients were stratified into 3 cohorts by BMI: underweight or normal weight (U/NW, BMI ≤25 kg/m2), overweight (OW, BMI >25 to ≤30 kg/m2), and obese (BMI >30 kg/m2). RESULTS: Among 466 TSA patients, 245 underwent aTSA whereas 221 underwent rTSA. In the aTSA cohort, 40 patients were classified as U/NW; 72, as OW; and 133, as obese. Comparatively, the rTSA cohort was composed of 33 U/NW, 79 OW, and 209 obese patients. Patients in the aTSA and rTSA cohorts had an average follow-up period of 5.8 ± 3.2 years and 4.5 ± 2.3 years, respectively. No differences in age at surgery were found in the aTSA group (U/NW vs. obese, 65.2 ± 7.9 years vs. 61.9 ± 8.9 years; P = .133); however, in the rTSA cohort, BMI was found to be inversely related to age at surgery (U/NW vs. obese, 72.4 ± 8.8 years vs. 65.7 ± 8.3 years; P < .001). Across all BMI cohorts, patients saw great improvements in range of motion and strength. Postoperative PROs after TSA did not vary by BMI in terms of Single Assessment Numeric Evaluation, Simple Shoulder Test, visual analog scale pain, and American Shoulder and Elbow Surgeons scores. There was no significant difference in survival rates at 10-year follow-up in the aTSA cohort (U/NW vs. obese, 95.8% vs. 93.2%; P = .753) or rTSA cohort (U/NW vs. obese, 94.7% vs. 94.5%; P = .791). CONCLUSION: With dramatic improvements in range of motion, minimal differences in PROs, and high rates of implant survival, TSA is a safe and effective treatment option for all patients, including overweight and obese patients.

Outcomes of Reverse Total Shoulder Arthroplasty Were Not Adversely Affected by the COVID-19 Pandemic.

Introduction: The objective was to investigate outcomes in reverse total shoulder arthroplasty (RTSA) in patients affected by the COVID-19 pandemic shutdown. We hypothesized that patients undergoing RTSA in early 2020 would have decreased access to physical therapy (PT) and worse postoperative outcomes compared to historical controls. Materials and Methods: Patients who received primary RTSA between 1/1/2020 to 3/17/2020 were included and patients who received primary RTSA between 1/1/2019 to 3/17/2019 were used as a control group. Retrospective chart review was performed, and patient reported outcomes were recorded at an average of 2.69 ± 0.06 years and a minimum of 1 year postoperatively. Patient data were collected and statistically analyzed using the 2-sample t-test and Chi-square test. The Mann Whitney U test and Fisher's Exact test were used when appropriate. Results: 38 patients in 2020 were included in this study and compared to 31 patients in 2019. RTSA performed in 2019 had improvements in forward elevation (FE) (95.7º ± 47.2º to 144.7º ± 17.2º, p<0.001), but not in external rotation (ER) (32.5º ± 20.3º to 41.0º ± 13.3º, p=0.15), or internal rotation (IR) (S1 to L5, p=0.76). RTSA 2020 cases had improvements in FE (111.5º ± 40.3 to 132.8º ± 30.6, p=0.016), but not ER (31.9º ± 18.2 to 35.7º ± 15.9, p=0.36) or IR (S1 to L5, p=0.13). Patients in 2019 (FE: 4 to 5-, p<0.001; ER: 4+ to 5-, p=0.003; IR: 5- to 5, p<0.001) and 2020 (FE: 4 to 5-, p<0.001; ER: 4+ to 5, p<0.001; IR: 5- to 5, p=0.02) both experienced improvements in strength. Patients in 2020 initiated PT later (2019: 39.3 ± 27.3 days, 2020: 57.1 ± 35.5 days, p=0.028) and completed less PT sessions (2019: 20.7 ± 11.1, 2020: 12.9 ± 6.6, p<0.001) than patients in 2019. In the 2020 cohort, 10.5% (4/38) did not complete any PT, 34.2% (13/38) reported a delay in initiating PT, and 47.4% (18/38) reported that their recovery was negatively affected by the COVID-19 pandemic. At final follow-up, patients in 2020 reported a mean SANE score of 73.6 ± 17.5 on their affected shoulder and a mean VAS score of 1.68 ± 1.23. Discussion: Despite a delay in initiating PT and completing less PT overall, patients who received RTSA in 2020 experienced significant improvements in ROM and strength at final follow-up and were comparable to the 2019 patients.

Superior Capsular Reconstruction: A Salvage Option for Massive Irreparable Rotator Cuff Tears with Pseudoparalysis or Subscapularis Insufficiency.

PURPOSE: We sought to examine superior capsular reconstruction (SCR) outcomes after minimum 2-year follow-up and determine risk factors that were predictive of outcomes. METHODS: Forty consecutive patients (mean age 57.3 years, 87.5% male) who underwent SCR for massive irreparable rotator cuff tears (RCT) met the inclusion criteria. Minimum 2-year follow-up was obtained for 32 patients (80% follow-up). Patient demographics and preoperative clinical findings were collected. Postoperative data, including complications, patient satisfaction, strength and range-of-motion (ROM), and patient-reported outcomes were collected. RESULTS: The Hamada score was ≤2 in 88% with average acromiohumeral interval distance of 6.8 mm. Preoperatively, 6 patients had external rotation lag (19%) and 6 had pseudoparalysis (19%). Intraoperative assessment of the subscapularis demonstrated true insufficiency in 38%. There was significant improvement in forward elevation (FE) (31° increase; P = .007) and strength in all planes (all P < .05). Patient-reported outcomes significantly improved (American Shoulder and Elbow Surgeon [ASES] 34-point increase; visual analog scale [VAS] 2.9-point decrease; single alpha-numeric evaluation [SANE] 48-point increase; all P < .05). Twenty-six patients (81%) were completely or somewhat satisfied with surgery. At time of final follow-up, 3/32 patients (9%) failed SCR and converted to reverse total shoulder arthroplasty. There were 4 (13%) reported complications (2 patients had postoperative falls; 1 patient had persistent severe pain; 1 had persistent stiffness). One patient was deceased. Patients with pseudoparalysis (n = 6) had significant improvement in post-operative FE (28 vs 154°; P < .0001) and SANE score (P = .016) with 66% patient satisfaction. However, outcome scores overall remained lower than SCR without pseudoparalysis. Regarding subscapularis insufficiency (n = 12), significant improvement was seen in postoperative FE (108 vs 158°; P = .019) and patient-reported outcome scores (P < .005). In patients converted from SCR to reverse total shoulder arthroplasty (n = 3), there were no distinguishing characteristics present. CONCLUSION: Superior capsular reconstruction is an effective salvage operation for massive irreparable RCT. Patients with pseudoparalysis or subscapularis insufficiency demonstrate significant postoperative improvement in FE and patient-reported outcomes. LEVEL OF EVIDENCE: IV, retrospective cohort.

Obesity and sex influence fatty infiltration of the rotator cuff: the Rotator Cuff Outcomes Workgroup (ROW) and Multicenter Orthopaedic Outcomes Network (MOON) cohorts.

BACKGROUND: Fatty infiltration (FI) is one of the most important prognostic factors for outcomes after rotator cuff surgery. Established risk factors include advancing age, larger tear size, and increased tear chronicity. A growing body of evidence suggests that sex and obesity are associated with FI; however, data are limited. METHODS: We recruited 2 well-characterized multicenter cohorts of patients with rotator cuff tears (Multicenter Orthopaedic Outcomes Network [MOON] cohort [n = 80] and Rotator Cuff Outcomes Workgroup [ROW] cohort [n = 158]). We used multivariable logistic regression to evaluate the relationship between body mass index (BMI) and the presence of FI while adjusting for the participant's age at magnetic resonance imaging, sex, and duration of shoulder symptoms, as well as the cross-sectional area of the tear. We analyzed the 2 cohorts separately and performed a meta-analysis to combine estimates. RESULTS: A total of 27 patients (33.8%) in the Multicenter Orthopaedic Outcomes Network (MOON) cohort and 57 patients (36.1%) in the Rotator Cuff Outcomes Workgroup (ROW) cohort had FI. When BMI < 25 kg/m2 was used as the reference category, being overweight was associated with a 2.37-fold (95% confidence interval [CI], 0.77-7.29) increased odds of FI and being obese was associated with a 3.28-fold (95% CI, 1.16-9.25) increased odds of FI. Women were 4.9 times (95% CI, 2.06-11.69) as likely to have FI as men. CONCLUSIONS: Among patients with rotator cuff tears, obese patients had a substantially higher likelihood of FI. Further research is needed to assess whether modifying BMI can alter FI in patients with rotator cuff tears. This may have significant clinical implications for presurgical surgical management of rotator cuff tears. Sex was also significantly associated with FI, with women having higher odds of FI than men. Higher odds of FI in female patients may also explain previously reported early suboptimal outcomes of rotator cuff surgery and higher pain levels in female patients as compared with male patients.

Editorial Commentary: Lower Return to Play After Failed Prior Instability Surgery: Should the Open Latarjet Be the Gold Standard for Anterior Shoulder Instability?

Anterior shoulder instability is common in contact athletes. Arthroscopic Bankart repair can result in good clinical outcomes, but high recurrence rates have been reported. The open Latarjet procedure can result in excellent functional outcomes with low rates of recurrent instability. Despite these encouraging results, there may be a lower return to play rate in athletes undergoing this procedure for a prior failed instability surgery. Due to the complexity of the procedure and high complication rate, the open Latarjet should continue to be reserved for cases of significant glenoid bone loss or revision settings.

Undergoing an Arthroscopic Procedure Prior to Shoulder Arthroplasty is Associated With Greater Risk of Prosthetic Joint Infection.

PURPOSE: To utilize a national all-payer claims dataset to understand whether a history of a prior shoulder arthroscopy is associated with adverse outcomes or complications after the index shoulder arthroplasty itself. METHODS: The Symphony Integrated DataVerse, an all-payer claims database, was used to identify patients undergoing primary shoulder arthroplasty (hemiarthroplasty, anatomic total shoulder arthroplasty, or reverse total shoulder arthroplasty) between 2017 to 2018. Current Procedural Terminology codes were used to identify patients who had undergone a shoulder arthroscopic procedure on the ipsilateral side within 2 years before the arthroplasty. Multivariate logistic regression analyses were used to assess whether prior shoulder arthroscopy was associated with higher risks of wound complications, postoperative stiffness, mechanical complications, prosthetic joint infection, revision surgery and readmissions within 90 days of the arthroplasty. RESULTS: In total, 19,429 patients were included, of which 837 (4.3%) had undergone shoulder arthroscopy within 2 years before the arthroplasty. Prior shoulder arthroscopy was associated with a significantly higher risk of prosthetic joint infection (odds ratio [OR] 2.74 [95% confidence interval {CI} 1.51-4.69]; P < .001) within 90 days of the arthroplasty. The greatest risk of prosthetic joint infection was associated with arthroscopies that took place within 3 months before the arthroplasty (OR 5.32 [95% CI 1.42-15.14]; P = .005). CONCLUSIONS: Undergoing an arthroscopic procedure of the ipsilateral shoulder before undergoing an arthroplasty was associated with greater risk of prosthetic joint infection. Furthermore, it appears that patients who received arthroscopy within the 3 months before arthroplasty had the highest risk of prosthetic joint infections. Physicians should not only anticipate possible inferior outcomes in patients who have had prior arthroscopy, but also consider delaying the arthroplasty by at least 3 months after the arthroscopy to mitigate the risks of experiencing this costly adverse event. LEVEL OF EVIDENCE: III.

Cost of Arthroscopic Rotator Cuff Repairs Is Primarily Driven by Procedure-Level Factors: A Single-Institution Analysis of an Ambulatory Surgery Center.

PURPOSE: To identify intraoperative drivers of cost associated with arthroscopic rotator cuff repairs (RCRs) through analysis of an institutional database. METHODS: This was a single-institution retrospective review of arthroscopic RCRs performed at an ambulatory surgical center between November 2016 and July 2019. Patient-level factors analyzed included age, sex, insurance type (private, Medicare, Medicaid, self-pay, and other government), American Society of Anesthesiologists grade (I, II, III, and missing), and Charlson comorbidity index (0, 1, 2, and ≥3). Procedure-level factors included use of biologics (decellularized dermal allograft or bioinductive healing implant), anesthesia type (regional block, monitored anesthesia care, or general), number of anchors and sutures, additional procedures (biceps tenodesis, distal clavicle resection, subacromial decompression), and operative time. Multivariate linear regression analysis was used to identify factors significantly associated with higher or lower charges. RESULTS: A total of 712 arthroscopic RCRs were included. The risk-adjusted operative charges were $19,728 (95% confidence interval $16,543 to $22,913). The above factors predicted nearly 65% of the variability in operative charges. The only patient-level factor significantly associated with lower charges was female sex (- $1,339; P = .002). Procedure-level factors significantly associated with higher charges were use of biologics (+ $17,791; P < .001), concurrent open biceps tenodesis (+ $4,027; P < .001), distal clavicle resection (+ $2,266; P = .039), use of regional block (+ $1,256; P = .004), number of anchors (+ $2,245/anchor; P < .001), and increasing operative time ($26/min). Other factors had no significant association. CONCLUSIONS: Procedural factors are the most significant drivers of operative cost in arthroscopic RCRs, such as quantity and type of implants; additional procedures such as biceps tenodesis and distal clavicle resection; and perioperative conditions such as type of anesthesia and total operating room time. Overall, patient-level factors were not shown to correlate well with operative costs, other than lower charges with female sex. LEVEL OF EVIDENCE: IV, economic study.

Male Sex, Western Ontario Shoulder Instability Index Score, and Sport as Predictors of Large Labral Tears of the Shoulder: A Multicenter Orthopaedic Outcomes Network (MOON) Shoulder Instability Cohort Study.

PURPOSE: To identify factors predictive of a large labral tear at the time of shoulder instability surgery. METHODS: As part of the Multicenter Orthopaedic Outcomes Network (MOON) Shoulder Instability cohort, patients undergoing open or arthroscopic shoulder instability surgery for a labral tear were evaluated. Patients with >270° tears were defined as having large labral tears. To build a predictive logistic regression model for large tears, the Feasible Solutions Algorithm was used to add significant interaction effects. RESULTS: After applying exclusion criteria, 1235 patients were available for analysis. There were 222 females (18.0%) and 1013 males (82.0%) in the cohort, with an average age of 24.7 years (range 12 to 66). The prevalence of large tears was 4.6% (n = 57), with the average tear size being 141.9°. Males accounted for significantly more of the large tears seen in the cohort (94.7%, P = .01). Racquet sports (P = .01), swimming (P = .02), softball (P = .05), skiing (P = .04), and golf (P = .04) were all associated with large labral tears, as was a higher Western Ontario Shoulder Instability Index (WOSI; P = .01). Age, race, history of dislocation, and injury during sport were not associated with having a larger tear. Using our predictive logistic regression model for large tears, patients with a larger body mass index (BMI) who played contact sports were also more likely to have large tears (P = .007). CONCLUSIONS: Multiple factors were identified as being associated with large labral tears at the time of surgery, including male sex, preoperative WOSI score, and participation in certain sports including racquet sports, softball, skiing, swimming, and golf. LEVEL OF EVIDENCE: I, prognostic study.

A Transdisciplinary Complex Adaptive Systems (T-CAS) Approach to Developing a National School-Based Culture of Prevention for Health Improvement: the School Health Research Network (SHRN) in Wales.

The paper reflects on a transdisciplinary complex adaptive systems (T-CAS) approach to the development of a school health research network (SHRN) in Wales for a national culture of prevention for health improvement in schools. A T-CAS approach focuses on key stages and activities within a continuous network cycle to facilitate systems level change. The theory highlights the importance of establishing transdisciplinary strategic partnerships to identify and develop opportunities for system reorientation. Investment in and the linking of resources develops the capacity for key social agents to take advantage of disruption points in the re-orientated system, and engagement activities develop the network to facilitate new social interactions and opportunities for transdisciplinary activities. A focus on transdisciplinary action research to co-produce interventions, generate research evidence and inform policy and practice is shown to play an important part in developing new normative processes that act to self-regulate the emerging system. Finally, the provision of reciprocal network benefits provides critical feedback loops that stabilise the emerging adaptive system and promote the network cycle. SHRN is shown to have embedded itself in the system by securing sustainability funding from health and education, a key role in national and regional planning and recruiting every eligible school to the network. It has begun to reorient the system to one of evidence generation (56 research studies co-produced) and opportunities for data-led practice at multiple levels. Further capacity development will be required to capitalise on these. The advantages of a complex systems approach to address barriers to change and the transferability of a T-CAS network approach across settings and cultures are highlighted.

The utility and cost of atypical cultures in revision shoulder arthroplasty.

BACKGROUND: At the time of revision shoulder arthroplasty, it is common practice to take cultures to evaluate for prosthetic joint infection even when an alternative cause of failure has been identified. Although isolation of fungal or acid-fast organisms is rare, it remains common practice to send all specimens for aerobic, anaerobic, and atypical (fungal and acid-fast) cultures. We hypothesize that the rate of positive atypical cultures at the time of revision shoulder arthroplasty is very low and routine use imposes a considerable financial burden on the health care system. METHODS: A retrospective review of all revision shoulder arthroplasties performed between January 1, 2010, and December 31, 2019, at our institution was performed. Patients with a hemiarthroplasty, total shoulder arthroplasty, reverse shoulder arthroplasty, or pre-existing antibiotic spacer who underwent revision to hemiarthroplasty, total shoulder arthroplasty, reverse shoulder arthroplasty, antibiotic spacer, or resection arthroplasty were included. Electronic patient charts were reviewed to gather patient, surgical, and culture data. An analysis of the hospital billing charges associated with each culture was performed using our hospital billing database and the current procedural terminology (CPT) codes for aerobic, anaerobic, fungal, and acid-fast cultures. A secondary outcome analysis was performed to identify factors associated with positive cultures. RESULTS: A total of 237 revision shoulder arthroplasties performed on 189 patients were analyzed. Cultures were sent on 158 of 237 (66.7%) surgeries with an average of 2.2 specimens per surgery. A total of 341 aerobic, 331 anaerobic, 187 fungal, and 174 acid-fast cultures were collected. Positive cultures were found in 52 of 341 (15.2%) aerobic cultures and 36 of 331 (10.9%) anaerobic cultures. The most commonly isolated organism was Cutibacterium acnes (42.2%), followed by methicillin-resistant Staphylococcus aureus (15.6%), coagulase-negative Staphylococcus species (13.3%), and methicillin-sensitive S. aureus (12.2%). There were zero positive fungal or acid-fast cultures in our series. The total billing charges for aerobic, anaerobic, fungal, and acid-fast cultures over the study period were $77,748, $23,832, $8,789, and $106,662, respectively, with atypical cultures accounting for 53.2% of the total charges for all cultures. For a single sample sent for all 4 culture types, atypical cultures account for 69% of the total amount charged. CONCLUSION: Isolation of fungal or acid-fast organisms at the time of revision shoulder arthroplasty is rare and imposes a considerable financial burden when these atypical cultures are sent on a routine basis. The collection of fungal and acid-fast cultures should be reserved for patients in whom risk factors for these atypical organisms have been identified.

Psychosocial factors affecting outcomes after shoulder arthroplasty: a systematic review.

BACKGROUND: Both anatomic and reverse total shoulder arthroplasty are considered successful surgeries to treat a variety of painful shoulder conditions. Although implant survivorship for both is good to excellent in the long term, a variety of factors-clinical, technical, and psychosocial-may affect patient-reported outcomes after shoulder arthroplasty. METHODS: A comprehensive review of the literature was performed systematically using keywords "shoulder arthroplasty outcomes," "psychosocial factors shoulder," "shoulder replacement outcomes," "depression shoulder arthroplasty," "satisfaction shoulder arthroplasty," "factors shoulder replacement," "expectations shoulder arthroplasty," and "predictors shoulder arthroplasty." Studies meeting the inclusion criteria were screened and analyzed. Type of surgery performed, sample size, outcome measures, and other factors influencing patient outcomes were recorded and analyzed. RESULTS: Sixteen studies met the inclusion criteria. Six reviewed mental health disorders as predictors of postoperative outcome after shoulder arthroplasty. Of these, 4 found that disorders such a depression and anxiety were associated with increased risk of perioperative complications and lower final functional outcome scores. Two studies evaluated workers' compensation status as a possible predictor of outcomes and found that patients with claims had lower satisfaction and outcome scores at final follow-up compared with those without claims. Two studies showed that preoperative opioid use was associated with lower outcome scores and overall satisfaction rate after shoulder arthroplasty. Three studies showed that higher patient confidence and preoperative expectations were correlated with better outcomes. CONCLUSION: Our review shows that psychosocial factors may play just as important role in affecting patient outcomes after total shoulder arthroplasty as technical factors.

Declining trends in Medicare physician reimbursements for shoulder surgery from 2002 to 2018.

BACKGROUND: As the current health care system evolves toward cost-containment and value-based approaches, evaluating trends in physician reimbursements will be critical for assessing and ensuring the financial stability of shoulder surgery as a subspecialty. METHODS: The Medicare Physician Fee Schedule Look-up Tool was used to retrieve average reimbursement rates for 39 shoulder surgical procedures (arthroscopy with or without repair, arthroplasty, acromioclavicular or clavicular open reduction-internal fixation, fixation for proximal humeral fracture and/or shoulder dislocation, open rotator cuff repair or tendon release and/or repair, and open shoulder stabilization) from 2002 to 2018. All reimbursement data were adjusted for inflation to 2018 dollars. RESULTS: After adjusting for inflation to 2018 dollars, average reimbursement for all included procedures decreased by 26.9% from 2002 to 2018. After stratifying the analysis by 3 distinct time groups, we observed that reimbursement decreases were the most significant prior to 2010. However, reimbursement rates still declined by an average of 2.9% from 2010 to 2014 and 7.2% from 2014 to 2018. Arthroscopic rotator cuff repair, capsulorrhaphy, and biceps tenodesis experienced smaller declines in reimbursement than their open-surgery counterparts. CONCLUSION: Medicare physician reimbursements for shoulder surgical procedures have decreased over time. Health care policy makers need to understand the impact of decreasing reimbursements to develop agreeable financial policies that will not only ensure provider satisfaction but also maintain access to care for patients.

Current diagnosis-related group-based bundling for upper-extremity arthroplasty: a case of insufficient risk adjustment and misaligned incentives.

BACKGROUND: The current Centers for Medicare & Medicaid Services diagnosis-related group (DRG) bundled-payment model for upper-extremity arthroplasty does not differentiate between the type of arthroplasty (anatomic total shoulder arthroplasty [ATSA] vs. reverse total shoulder arthroplasty vs. total elbow arthroplasty [TEA] vs. total wrist arthroplasty) or the diagnosis and indication for surgery (fracture vs. degenerative osteoarthritis vs. inflammatory arthritis). METHODS: The 2011-2014 Medicare 5% Standard Analytical Files (SAF5) database was queried to identify patients undergoing upper-extremity arthroplasty under DRG-483 and -484. Multivariate linear regression modeling was used to assess the marginal cost impact of patient-, procedure-, diagnosis-, and state-level factors on 90-day reimbursements. RESULTS: Of 6101 patients undergoing upper-extremity arthroplasty, 3851 (63.1%) fell under DRG-484 and 2250 (36.9%) were classified under DRG-483. The 90-day risk-adjusted cost of an ATSA for degenerative osteoarthritis was $14,704 ± $655. Patient-level factors associated with higher 90-day reimbursements were male sex (+$777), age 75-79 years (+$740), age 80-84 years (+$1140), and age 85 years or older (+$984). Undergoing a TEA (+$2175) was associated with higher reimbursements, whereas undergoing a shoulder hemiarthroplasty (-$1000) was associated with lower reimbursements. Surgery for a fracture (+$2354) had higher 90-day reimbursements. Malnutrition (+$10,673), alcohol use or dependence (+$6273), Parkinson disease (+$4892), cerebrovascular accident or stroke (+$4637), and hyper-coagulopathy (+$4463) had the highest reimbursements. In general, states in the South and Midwest had lower 90-day reimbursements associated with upper-extremity arthroplasty. CONCLUSIONS: Under the DRG-based model piloted by the Centers for Medicare & Medicaid Services, providers and hospitals would be reimbursed the same amount regardless of the type of surgery (ATSA vs. hemiarthroplasty vs. TEA), patient comorbidity burden, and diagnosis and indication for surgery (fracture vs. degenerative pathology), despite each of these factors having different resource utilization and associated reimbursements. Lack of risk adjustment for fracture indications leads to strong financial disincentives within this model.

High prevalence of outpatient falls following elective shoulder arthroplasty.

BACKGROUND: This study characterized the prevalence and risk factors of inpatient and outpatient postoperative falls in patients undergoing elective shoulder arthroplasty. METHODS: A retrospective chart review of 198 patients undergoing anatomic or reverse total shoulder arthroplasty or hemiarthroplasties at one institution between 2015 and 2017 was reviewed to determine the prevalence of inpatient and outpatient falls up to 90 days after discharge. Univariate and multivariate analyses were conducted to assess potential risk factors for postoperative falls including demographics, indication for surgery, surgical procedure, medical history, length of hospital stay, perioperative hemoglobin, need for transfusion, and discharge disposition. RESULTS: There were 23 falls in 22 patients within a 90-day postoperative period. The inpatient fall rate was 1.0% (2 of 198). The outpatient fall rate was 10.6% (21 of 198). Outpatient falls resulted in emergency department evaluation in 23.8% of cases (5 of 21), readmission in 19.0% (4 of 21), injury to an anatomic site other than the shoulder in 19.0% (4 of 21), and injury at the surgical site (eg, periprosthetic humeral fracture) in 4.8% (1 of 21). No significant risk factors were identified for inpatient falls. Independent risk factors for an outpatient fall were female sex (adjusted odds ratio [aOR] = 4.79; 95% confidence interval [CI]: 1.32, 17.4; P = .007), increased length of hospital stay (aOR = 1.23; 95% CI: 1.04, 1.45; P = .02), and history of a movement disorder (aOR = 7.20; 95% CI: 1.22, 42.6; P = .03). CONCLUSION: A high outpatient fall rate of 10.6% within 90 days after discharge raises the concern that falls after shoulder arthroplasty are significantly higher than previously reported.

Factors Influencing Surgeon's Choice of Procedure for Anterior Shoulder Instability: A Multicenter Prospective Cohort Study.

PURPOSE: To investigate preoperative factors associated with selection of surgical treatment for anterior shoulder instability. METHODS: Patient demographics, initial physical examinations, and patient-oriented outcome questionnaires were collected prospectively from 26 shoulder surgeons at 10 sites. Symptom duration, number of dislocations, sport, history of prior stabilization procedure, Hill-Sachs/glenoid bone loss, pain level, and failure of conservative treatment were recorded. Statistical analysis was performed with Fisher's exact test and logistic regression analysis. RESULTS: A total of 564 patients who underwent surgical treatment for anterior shoulder instability from November 2012 to June 2017 were enrolled. Of these, 426 shoulders underwent arthroscopic stabilization alone, 38 underwent arthroscopic stabilization with remplissage, 28 underwent open Bankart repair, and 72 underwent a Latarjet procedure. Predictors for undergoing Latarjet (P < .003) were symptom duration (75% had symptoms for >1 year), number of dislocations (47% had >5 dislocations), revision surgery (69%), Hill-Sachs lesion size (45% had a lesion between 11% and 20% of the humeral head), and glenoid bone loss (75% of Latarjet patients had 11% to 30% loss). Predictors for undergoing open Bankart repair (P < .001) were number of dislocations (32% had >5 dislocations), revision surgeries (54%), and glenoid bone loss (11% of open Bankart patients had 11% to 20% loss). History of prior shoulder surgery was the only significant predictor of open versus arthroscopic Bankart procedure. Prediction models showed athletes involved in high-risk sports were 2.61 times more likely to have a Latarjet (P < .01). CONCLUSIONS: Indications for the Latarjet were: humeral and glenoid bone loss, duration of symptoms, number of dislocations, and revision stabilizations. Athletes involved in high-risk sports were more likely to undergo the Latarjet procedure, even if other predictive factors were not present. The open Bankart procedure was the least common procedure performed, with a history of prior shoulder surgery being the only predictor for use when treating recurrent instability. LEVEL OF EVIDENCE: Level II, prospective prognostic cohort investigation.

Navigating the Research in Rotator Cuff Disease: An Evidence-Based Approach to Improved Patient Outcomes.

Rotator cuff tears are prevalent injuries, yet their management and identifying patients who will benefit from surgical intervention are controversial topics. Population studies demonstrate high rates of asymptomatic tears that, with time, show a general progression of the pathologic state. However, not all tears are or will become symptomatic or require surgical intervention. Surgeons should be aware of the natural history of rotator cuff tears and be able to identify injuries at risk of progression or causing symptoms, be able to determine the cellular level of tear characteristics and healing, understand current management strategies and outcomes, and be familiar with future directions for therapies and research.

Sex-related differences in patients undergoing surgery for shoulder instability: a Multicenter Orthopaedic Outcomes Network (MOON) Shoulder Instability cohort study.

HYPOTHESIS AND BACKGROUND: Male sex has been identified as a risk factor for both primary shoulder dislocation and recurrent instability, and male patients more often undergo surgery for instability. Despite published discrepancies between sexes regarding the incidence and surgical rates of shoulder instability, there is little detail on the differences in presentation, mechanism of injury, and intraoperative findings. The purpose of this study was to explore these differences. METHODS: Prospective baseline data from 1010 patients in the Multicenter Orthopaedic Outcomes Network (MOON) Shoulder Instability cohort were analyzed for sex-related differences using demographic characteristics, patient-reported outcomes, radiographic findings, intraoperative findings, and surgical procedures performed. Two-tailed t tests and χ2 tests were used to compare the continuous and categorical data, respectively. Patients were categorized using the Frequency, Etiology, Direction, Severity (FEDS) classification system. RESULTS: Male patients comprised 81.3% of the cohort. Male patients had a significantly higher rate of traumatic instability and rate of initial instability while playing sports, as well as significantly higher activity scores. Female patients had significantly lower preoperative American Shoulder and Elbow Surgeons, Western Ontario Shoulder Instability Index, 36-Item Health Survey, and Single Assessment Numeric Evaluation scores. No difference in the number of dislocations was found between male and female patients. Intraoperatively, male patients had higher rates of labral pathology and bone loss whereas female patients had higher rates of capsular laxity. These differences resulted in more Latarjet procedures for male patients and more soft-tissue procedures for female patients. CONCLUSION: There are differences between male and female patients in the etiology of their instability, baseline patient-reported outcomes, and associated shoulder pathology, likely reflecting intrinsic and activity-related variation. These differences may influence clinical decision making and patient outcomes.

Sarcomatous Component in Uterine Carcinosarcomas Correlates With Advanced Stage and Poorer Prognosis.

Uterine carcinosarcomas, also known as malignant-mixed mullerian tumors, are rare and highly aggressive tumors whose prognostic factors remain controversial. The stage at the time of presentation is the most important prognostic factor thus far, but little information exists on the prognostic impact of the sarcomatous component (SC) in these tumors. We reviewed 21 cases of uterine carcinosarcomas and estimated the volume of the SC in each case. This information was correlated with the stage of the tumor at presentation. The percentage of the SC was also used to stratify the patients into 2 cohorts (high percentage of SC and low percentage of SC), and the 2 patient cohorts were compared based on the available follow-up data to identify prognostic differences. Patients with a lower concentration of SC (<30%) typically presented with low stage of disease when compared with their counterparts. Although not statistically significant (P=0.1966), our data suggest a correlation between a lower concentration of SC with longer follow-up and longer survival rates when compared with those of patients presenting with higher volumes of the SC (≥30%). Greater volume of the SC is seen in advanced stage tumors, which could serve as an indicator of prognosis.

A prospective evaluation of predictors of pain after arthroscopic rotator cuff repair: psychosocial factors have a stronger association than structural factors.

HYPOTHESIS: We evaluated the correlation of preoperative factors with pain after arthroscopic rotator cuff repair (ARCR). We hypothesized that nonstructural factors, including metrics of psychological well-being and preoperative narcotic use, would correlate with higher pain levels postoperatively and that structural factors, such as tear size, would not be predictive. METHODS: Ninety-three patients were prospectively enrolled and evenly distributed by tear size. Patient sex, age, occupation, smoking status, tear mechanism, tear characteristics on magnetic resonance imaging, visual analog scale (VAS) pain scores, narcotic usage, range of motion (ROM) by goniometry, and functional and psychological assessments through the American Shoulder and Elbow Surgeons (ASES) Standardized Shoulder Assessment Form, Simple Shoulder Test, Western Ontario Rotator Cuff Index (WORC), and RAND 36-item Short Form Survey questionnaires were obtained preoperatively. VAS scores and ROM were collected postoperatively at 2 weeks, 6 weeks, 3 months, 6 months, and 1 year. The ASES, SST, WORC, and RAND 36-item Short Form Survey questionnaires were repeated 1 year postoperatively. RESULTS: The patients (54% men) were a mean age of 56.4 years. There were 68% traumatic tears, 11% smokers, and 13% used narcotics preoperatively. ROM, VAS, ASES, and WORC scores improved significantly from the preoperative to 1-year postoperative assessment. Correlating with increased pain scores at 1 year were preoperative narcotic use, higher preoperative VAS, and lower scores on the WORC index and emotion sections. CONCLUSION: Our data show that the factors most predictive of persistent pain after ARCR are psychosocial characteristics, including poor performance on validated measures of emotional well-being. Demographic and tear-specific structural factors did not correlate with postoperative pain scores.