Patient age is a factor in early outcomes after shoulder arthroplasty

Patients 75 years or older with primary glenohumeral arthritis and an intact rotator cuff show similar clinical improvement after reverse or anatomic total shoulder arthroplasty

BACKGROUND

The optimal management of primary glenohumeral arthritis (GHOA) in the elderly is an ongoing topic of debate. The purpose of this study was to compare functional outcomes and complications in patients aged 75 years or older treated with anatomic total shoulder arthroplasty (TSA) or reverse shoulder arthroplasty (RSA) for primary GHOA with an intact rotator cuff.

METHODS

A retrospective study was performed on a prospectively maintained database which was queried for patients 75 years of age or older who underwent TSA or RSA for primary GHOA with an intact rotator cuff at a single institution between 2012 and 2021 with minimum 2-year follow-up. Patient-reported outcomes (PROs), including Visual Analog Scale for pain, American Shoulder and Elbow Surgeons, and Subjective Shoulder Value, as well as active range of motion including forward flexion, external rotation, internal rotation, were collected preoperatively and postoperatively. Complications, reoperations, and satisfaction were also recorded. The percentage of patients achieving clinically significant improvement was evaluated with the minimally clinical important difference, substantial clinical benefit, and patient acceptable symptomatic state for each PRO.

RESULTS

One-hundred and 4 patients were available for analysis, including 67 TSA patients and 37 RSAs with a mean follow-up of 39.4 months. Preoperative baseline characteristics, PROs, and range of motion were similar between groups. RSA was more commonly performed for eccentric glenoid wear (Walch B2/B3, 62% vs. 22%; P < .001). While clinical outcomes improved comparably in both groups, the TSA cohort showed significantly greater improvement in external rotation (36° vs. 26°; P = .013). Both cohorts had low revision (3% for TSA vs. 0% for RSA) and complication (7% for TSA vs. 5% for RSA; P = .677) rates. Satisfaction was similar in both groups (93% for TSA vs. 92% for RSA; P = .900). Clinically significant improvement was comparable between groups based on the American Shoulder and Elbow Surgeons score (minimally clinical important difference, 93% for TSA vs. 100% for RSA; substantial clinical benefit, 82% vs. 95%; patient acceptable symptomatic state, 67% vs. 78%; P > .05).

CONCLUSION

In this retrospective small sample size comparison study, TSA and RSA provide similar short-term clinical outcomes for patients 75 years and older with primary GHOA and an intact rotator cuff. Complication and revision rates are comparably low at short-term follow-up. Our data suggests that advanced age alone should not be used as a decision-making tool for TSA vs. RSA in the setting of primary GHOA with an intact rotator cuff.

Anatomic Total Shoulder: Predictors of Excellent Outcomes at Five Years after Arthroplasty

PURPOSE

The objectives of this study were to: report minimum 5-year outcomes in patients undergoing TSA and determine characteristics predictive of patients achieving an excellent functional outcome.

METHODS

Pre-operative demographic variables and Simple Shoulder Test (SST) scores were obtained pre-operatively and at a minimum of five years after surgery. A final SST ≥ 10 and percentage of maximal possible improvement (% MPI) of ≥ 66.7% were determined to be the thresholds for excellent outcomes. Univariate and multivariate analysis were performed to identify factors associated with excellent five year clinical outcomes.

RESULTS

Of 233 eligible patients, 188 (81%) had adequate follow-up for inclusion in this study. Mean SST scores improved from 3.4 ± 2.4 to 9.7 ± 2.2 (p < 0.001). Male sex was an independent predictor of both SST ≥ 10 (OR 3.46, 95% CI 1.70-7.31; p < 0.001) and %MPI ≥ 66.7 (OR 2.27, 95% CI 1.11-4.81, p = 0.027). Workers' Compensation insurance was predictive of not obtaining SST ≥ 10 (OR 0.12, 95% 0.02-0.60; p = 0.016) or %MPI ≥ 66.7 (OR 0.16, 95% CI 0.03-0.77, p = 0.025). MCID was passed by the vast majority (95%) of patients undergoing TSA and did not necessarily indicate an excellent, satisfactory outcome.

CONCLUSION

Male sex and commercial insurance coverage were significantly associated with these excellent outcomes, while Workers' Compensation insurance was associated with failure to achieve this result. Thresholds for excellent outcomes, such as final SST ≥ 10 and %MPI ≥ 66.7, may be useful in identifying the characteristics of patients who benefit most from TSA.

Superior humeral head osteophytes are associated with rotator cuff insufficiency in glenohumeral osteoarthritis: a retrospective analysis

PURPOSE

The primary goal of this study was to investigate whether superior humeral head osteophyte (SHO) size is associated with rotator cuff insufficiency, including rotator cuff tear (RCT), supraspinatus tendon thickness, and fatty infiltration of the rotator cuff muscles.

METHODS

Patients  ≥ 18 years who were diagnosed with glenohumeral osteoarthritis were retrospectively reviewed. SHO size was determined by radiograph. MRI measured SHO and RCT presence, type, and size; supraspinatus tendon thickness; and fatty infiltration of rotator cuff musculature.

RESULTS

A total of 461 patients were included. Mean SHO size was 1.93 mm on radiographs and 2.13 mm on MRI. Risk ratio for a RCT was 1.14. For each 1-mm increase in SHO size on radiograph, supraspinatus tendon thickness decreased by 0.20 mm. SHO presence was associated with moderate-to-severe fatty infiltration of the supraspinatus with a risk ratio of 3.16.

CONCLUSION

SHOs were not associated with RCT but were associated with higher risk of supraspinatus FI and decreased tendon thickness, which could indicate rotator cuff insufficiency.

LEVEL OF EVIDENCE

IV.

Total shoulder arthroplasty in patients aged 80 years and older: a systematic review

BACKGROUND

Elderly patients and their surgeons may eschew shoulder arthroplasty due to concerns over patient safety and longevity. The purpose of this study was to review the current literature evaluating the clinical and radiographic outcomes of shoulder arthroplasty performed in patients 80 years and older.

METHODS

A literature search of the Embase, PubMed, Medline, and Cochrane databases was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Studies evaluating the outcomes of primary and revision anatomic (aTSA) and reverse (RSA) total shoulder arthroplasty in patients 80 years and older were included for analysis.

RESULTS

A total of 15 studies evaluating 1685 primary aTSAs, 1170 primary RSAs, 69 RSAs performed for fracture, and 45 revision RSAs were included for review. The postoperative active forward flexion and external rotation ranged from 138° to 150° and 45° to 48° after aTSA and from 83° to 139° and 16° to 47° after RSA, respectively. Postoperative visual analog scale pain scores ranged from 0 to 1.8 after aTSA and from 0 to 1.4 after RSA. Ninety-day mortality ranged from 0% to 3%, and perioperative complications ranged from 0% to 32%. Late complications ranged from 5.6% to 24% for aTSA patients and 3.5% to 29% for patients undergoing RSA for all indications. Common complications included glenoid loosening (0%-18%) and rotator cuff tear (5.6%-10%) after aTSA and scapular notching (0%-40%) and scapular fracture (4%-9.4%) after RSA. Reoperation rates ranged from 0% to 6% after aTSA and from 0% to 13% after RSA.

CONCLUSIONS

aTSA and RSA in this population are safe and effective, demonstrating low rates of perioperative mortality and reoperation, durability that exceeds patient longevity, satisfactory postoperative range of motion, and excellent pain relief. Late complication rates appear to be similar for aTSA and RSA.

Total shoulder arthroplasty in France: An analysis of trends between 2009 and 2019 and projections to the year 2070

BACKGROUND

Over the past decades, total shoulder arthroplasty (TSA) procedures have steadily increased in the United States and Europe. In France, the number of shoulder surgeries rose by 24.5% between 2012 and 2018, but no study has yet analyzed TSA trends based on patient characteristics. Therefore, the aim of our study was to use the French healthcare database to (1) analyze growth trends based on the patient's sex, age, and comorbidity profile and (2) estimate the most appropriate incidence rate (IR) projections to the year 2070.

HYPOTHESIS

We hypothesize that in France, the upward trends are different for each sex and age group.

MATERIALS AND METHODS

This study was conducted in France from 2009 to 2019 based on the French healthcare database (SNDS), which contains all nationwide procedures. Patients were analyzed by sex, age group (<65 years, 65-74 years, ≥75 years), and comorbidity profile (4 levels). IR trends per 100,000 population were inferred by patient age, sex, and comorbidity using data from the French hospital discharge database (PMSI) and population forecasts and censuses from the French National Institute of Statistics and Economic Studies (INSEE). Linear, Poisson, logistic, and Gompertz projection models were created to forecast IRs to the year 2070.

RESULTS

Between 2009 and 2019, there was a sharper increase in IR in males (+155%; from 6.0 to 15.3) than in females (+118%; from 16.2 to 35.3) across all age groups. This increase was most significant in those younger than 65 years (+112%; from 2.3 to 4.9), in both males (+129%; from 2.1 to 4.8) and females (+99%; from 2.5 to 5.0). From 2012 to 2019, the proportion of patients with mild comorbidities increased by +92% (from 5,435 to 10,410 TSAs, i.e., from 56% to 61% of total procedures), unlike the other comorbidity profiles. All the projections modeled the data from 2009 to 2019 with minor deviations. However, the logistic projection was the most likely, with a 45% increase in the IR for the overall population by 2070 (from 17,175 to 25,338 TSAs), which will start to plateau in 2050.

CONCLUSION

The IR has risen sharply in the overall population, as in all age, sex, and comorbidity categories, with the most significant growth seen in the<65 and 65-74 age groups and a shift toward patients with milder comorbidities. According to our projections, the IR will continue to be more significant in older patients, except for males, for whom the IR for those 65 to 74 years old will exceed that of those 75 and older around 2030. In the longer term, the IRs follow a logistic trend, reaching a plateau around 2050. Therefore, an increase in healthcare burden is to be expected to meet the growing demand for TSAs.

LEVEL OF EVIDENCE

IV; Descriptive epidemiological study.

Comparable outcomes of reverse shoulder arthroplasty for proximal humerus fractures and for rotator cuff arthropathy in a predominantly asian population

Background

Reverse shoulder arthroplasty (RSA) was initially developed for rotator cuff arthropathy but has been expanded to treat comminuted proximal humerus fractures. Few studies have compared RSA for traumatic and degenerative indications. We present the first report of mid-term outcomes of RSA comparing both indications in an Asian population.

Methods

113 degenerative and 20 fracture patients underwent RSA from 2010 to 2019. Patients with degenerative indications were 4:1 propensity-score matched to fractures and adjusted for age and sex. Patients were assessed for range of motion (ROM), strength, pain, Constant-Murley score (CMS), University of California Los Angeles Shoulder Score (UCLA) and Oxford shoulder score (OSS) preoperatively, at 6-months and 1-year. Patients' satisfaction, expectation fulfilment and minimal clinically important difference (MCID) were analysed.

Results

Degenerative patients had better ROM, isometric strength and CMS at 6-months, although at 1-year only abduction was superior (104.8  ±  17.3° vs 86.7  ±  19.8°). No significant differences in pain, UCLA and OSS were observed. Most improvements occurred within 6 months. Similar proportions of patients were satisfied (83.3% vs 73.3%, p = 0.460) and attained MCID (85.0% vs 86.7%, p = 1.000) at 1-year.

Discussion

Although initially exhibiting slower recovery, patients with proximal humerus fractures can expect similar functional recovery and satisfaction at 1-year compared to those who received RSA for degenerative indications.

Anatomic Total Shoulder Arthroplasty Versus Reverse Total Shoulder Arthroplasty in Patients Aged Over 70 Without a Full-Thickness Rotator Cuff Tear: A Systematic Review and Meta-Analysis

Introduction

This systematic review and meta-analysis compared the revision rates, complications, and outcomes in anatomic total shoulder arthroplasty (aTSA) and reverse TSA (rTSA) performed for primary glenohumeral osteoarthritis in patients aged over 70 years without a full-thickness rotator cuff tear.

Materials and Methods

We performed a systematic literature search identifying comparative studies meeting the above patient criteria and published from January 2010 to May 2022 from 3 databases: MEDLINE, EMBASE, and Cochrane Library. We performed the systematic review in accordance with PRISMA guidelines and the study was prospectively registered on PROSPERO.

Results

From the 1798 studies identified from the initial literature search, 4 met our inclusion criteria. Two thousand seven hundred thirty-one shoulder arthroplasties (1472 aTSA and 1259 rTSA) were evaluated with a minimum follow up of 2 years. A statistically significant lower revision rate was observed in rTSA compared to aTSA (odds ratio [OR] 0.50, 95% confidence interval [CI]: 0.30, 0.84, p < .05). No significant difference was noted between aTSA and rTSA in overall complication rate (OR 0.98, 95% CI 0.34, 2.86, p = .97) while aTSA displayed a statistically significant improved postoperative Constant-Murley score [aTSA: 80(75; 82), rTSA: 68(66; 76.5), p < .001].

Conclusion

Higher revision rates were identified following aTSA in our study population, although admittedly this is within retrospective studies. aTSA displayed equal functional results and postoperative complications compared to rTSA in patients over 70 without a full-thickness rotator cuff tear. Given these similar results a shoulder surgeon must carefully consider each patient individually prior to deciding the optimal form of arthroplasty to offer.

Outpatient total shoulder arthroplasty in the ambulatory surgery center: a comparison of early complications in patients with and without glenoid bone loss

Background

The purpose of this study is to compare the 90-day complications and readmission rates between patients undergoing total shoulder arthroplasty (TSA) in an ambulatory surgery center (ASC) with glenoid bone loss requiring an augmented glenoid component compared to patients without bone loss.

Methods

This is a retrospective cohort study of patients undergoing outpatient TSA at an ASC (2018-2021). Readmission, direct transfer, and complications were recorded. Major and minor complications were compared. Secondary outcomes included operative time, estimated blood loss, range of motion, and patient-reported outcome measures.

Results

There were 44 patients (45 shoulders) included in the study, 20 with augmented implants for glenoid bone loss and 25 nonaugmented with a concentric glenoid. There were no statistical differences in demographics. Two complications were seen in both the augmented and nonaugmented groups (10% vs. 8%). There were no readmissions or direct transfers. The augmented group had significantly increased preoperative glenoid retroversion (23° vs. 9°, P < .05), posterior humeral head subluxation (78% vs. 61%., P < .05), and longer operative time (124.4 min vs. 112.3 min., P < .05). Patient-specific instrumentation was used in 60% of augmented cases and 29% of nonaugmented cases.

Conclusion

There was no significant difference in complications, direct transfers, or readmissions between patients with and without glenoid bone loss being treated in an outpatient ASC. The augmented group had significantly worse preoperative deformities, longer operative times, and increased utilization of patient-specific instrumentation. Outpatient TSA in the setting of glenoid bone loss requiring augmentation was found to be safe and effective at a stand-alone ASC.

Does age at surgery influence short-term outcomes and readmissions following anatomic total shoulder arthroplasty?

Background

Increasing age has been associated with adverse outcomes in various orthopedic procedures including anatomic total shoulder arthroplasty (aTSA). Moreover, both indications and the ages at which the procedure is done has expanded. For these reasons, it is important to characterize the impact age has on complication and readmission rates following shoulder replacement.

Methods

The National Readmissions Database was used to identify patients who underwent aTSA between the years 2016-2018. Patients were stratified into five cohorts based on age at surgery: 18-49, 50-59, 60-69, 70-79, and 80+ years old. We analyzed and compared data related to patient demographics, length of stay, readmission and complication rates, and healthcare charges. A multivariate analysis was used to identify the independent impact of age on complication rates.

Results

42,505 patients were included with 1,541, 6,552, 16,364, 14,694, 3,354, patients in the 18-49, 50-59, 60-69, 70-79, and 80+ years old cohorts respectively. Length of stay had a stepwise increase with age increases (p < 0.001), however total charges were comparable between cohorts (p = 0.40). Older patients were more likely to experience intraoperative complications, pulmonary embolism complications, and postoperative infection, but were less likely to experience hardware, surgical site, and prosthetic joint complications. Older patients had higher rates of readmission. Age was an independent predictor for higher 30-/90-day readmission, postoperative/intraoperative complication, and respiratory complication rates. Increasing age provided a protective measure for prosthetic complications surgical site infection.

Conclusion

This study identified multiple differences in complication rates following aTSA based on age at surgery. Overall, age had varying effects on intraoperative and postoperative complication rates at short-term follow-up. However, increasing age was associated with longer lengths of stay and increased readmission rates. Surgeons should be aware of the identified complications that are most prevalent in each age group and use this information to avoid adverse outcomes following shoulder replacement surgery.

Survivorship after reverse total shoulder arthroplasty and predictors of 1-year and overall mortality

BACKGROUND

Patient survivorship and risk factors of mortality after reverse total shoulder arthroplasty (RTSA) are seldom and inadequately studied. The purpose of this study was to evaluate the mortality rates and predictors of 1-year and overall mortality after RTSA.

METHODS

We retrospectively reviewed 1518 consecutive adult patients who underwent RTSA at our institution. The Social Security Death Index and institutional electronic medical records were queried to verify patient living status. Patients were censored at date of death if deceased, the date that living status was verified if alive, or latest follow-up if living status could not be verified. Mortality rates and risk factors of 1-year and overall mortality after RTSA were identified on univariate and multivariate analysis.

RESULTS

Mean follow-up was 5.1 ± 3.8 years. Thirty-day (0.1%), 90-day (0.7%), and 1-year (1.8%) mortality rates were low but increased to 11% at 5 years. Increased odds of 1-year mortality were independently associated with heart disease (odds ratio [OR] 2.64, 95% confidence interval [CI] 1.07-6.50, P = .035) and use of a cemented stem (OR 2.64, 95% CI 1.04-6.69, P = .041). Independent risk factors of overall mortality included older age at surgery (hazard ratio [HR] 1.05, 95% CI 1.03-1.07, P < .001), minority ethnicity (protective risk factor, HR 0.37, 95% CI 0.15-0.91, P = .031), heart disease (HR 1.42, 95% CI 1.00-2.02, P = .048), diabetes mellitus (HR 1.47, 95% CI 1.04-2.08, P = .028), tobacco use (HR 1.79, 95% CI 1.08-2.98, P = .025), post renal transplant (HR 12.69, 95% CI 3.92-41.05, P < .001), chronic liver failure (HR 4.40, 95% CI 1.38-14.09, P = .013), and receiving a cemented stem (HR 1.60, 95% CI 1.13-2.26, P = .008).

CONCLUSIONS

RTSA carries a low risk of short-term mortality postoperatively. When counseling patients preoperatively, surgeons should consider the predictors of mortality after RTSA reported herein to ensure appropriate patient selection and counseling.

Reverse Total Shoulder Arthroplasty in Patients Who Exceeded Their Life-Expectancy: A Retrospective Study

Background

Reverse total shoulder arthroplasty (RTSA) has become an established treatment for cuff arthropathy, severe osteoarthritis and in certain fracture cases. Due to the increasingly aging population, patients who have already exceeded their life-expectancy pose a significant challenge to the shoulder surgeon.

Methods

Patients older than 83 years who received a RTSA were included. Elective cases were compared to fracture cases. Patient demographics, hospital stay length, complication rate, functional outcome, patient reported outcome scores and mortality were assessed retrospectively.

Results

We included 110 cases, 48 in the elective group and 62 in the fracture group. The average age at time of surgery was 86.6 ± 3.5 years. Mean follow-up was 30 months. Elective cases had a significant shorter hospital stay length (P = .014). Functional outcome scores showed better results for the elective group with ASES 79 ± 12 vs 69 ± 19 (P = .07), QuickDASH 29 ± 16 vs 37 ± 21 (P = .22), subjective shoulder value 86 ± 14 vs 75 ± 19 (P = .04*) and VAS .7 ± 1.5 vs 2.1 ± 2.5 (P = .02*). There was no significant difference in ROM and mean quality-adjusted-life-years (QALY) with 3.2 ± 1.8 vs 3.5 ± 2.5 years (P = .69). The complication rate requiring surgical intervention was 2.4% in the elective and 6.5% in the fracture group. The 1-year mortality was 3 (6%) respectively 9 (15%).

Conclusion

RTSA in elderly patients can be successful with good functional outcomes. Age should not be a contraindication. Instead, the patient's activity level and quality of life should be taken into account. Elective RTSA show better functional outcome scores and lower complication rates compared to RTSA in proximal humeral fractures.

Reverse shoulder arthroplasty in patients 85 years and older is safe, effective, and durable

BACKGROUND

Reverse shoulder arthroplasty (RSA) was originally indicated for older adults, but outcomes in the oldest patients have not been studied. The purpose of this study was to report on patients aged ≥85 years undergoing RSA. We hypothesized that RSA would be safe, effective, and durable.

METHODS

Sixty-one RSAs were performed in 58 patients aged ≥85 years (16 patients aged ≥90 years); 40 RSAs were performed for arthritis with cuff deficiency, 14 were performed for proximal humeral fractures, and 7 were performed as revisions. Active range of motion and patient-reported outcomes, comprising the American Shoulder and Elbow Surgeons score, Simple Shoulder Test score, and visual analog scale pain score, were obtained preoperatively and at final follow-up. Hospital length of stay, discharge disposition, and complications were recorded. Kaplan-Meier survivorship was computed with revision surgery or death as an endpoint.

RESULTS

The mean age at RSA was 88.0 years. Mean forward elevation improved from 50.5° to 105.3°; abduction, from 48.7° to 96.1°; and external rotation, from 10.2° to 26.9° (P < .001 for all). Similarly, at a mean follow-up of 2.4 years, the visual analog scale pain score improved from 6.1 to 0.6; Simple Shoulder Test score, from 2.2 to 7.0; and American Shoulder and Elbow Surgeons score, from 33.6 to 78.2 (P < .001 for all). The mean length of stay was 3.6 days, and 15 patients were discharged home. Seven patients received a blood transfusion, and only 2 patients underwent a reoperation, neither of whom required explantation.

DISCUSSION AND CONCLUSION

Improvements in active range of motion and patient-reported outcomes in our patients were comparable to those observed in younger cohorts and exceeded published minimal clinically important differences for most patients undergoing RSA for cuff deficiency. Additionally, to date, the patients in our study who died had lived with their RSA for a mean of 3.4 years and living patients had lived with their RSA for a mean of 4.3 years. RSA in patients aged ≥85 years is safe, effective, and durable for their remaining life expectancy. This information may help counsel older patients who are considering RSA, electively or for fractures.

Clinical and radiographic outcomes of hybrid glenoid fixation with a central porous titanium post: analysis of 713 consecutive shoulders

BACKGROUND

Hybrid glenoid component fixation represents an emerging technology in total shoulder arthroplasty (TSA) design. However, there is a paucity of larger-scale studies reporting the outcomes following implantation of these components. This study aimed to determine the outcomes following primary TSA using hybrid glenoid component fixation with a central porous titanium post.

METHODS

A retrospective review of 2 institutional databases identified patients aged ≥ 18 years who underwent primary elective hybrid TSA between 2009 and 2018 with a minimum of 2 years of follow-up. Outcomes evaluated included the visual analog scale pain score, range of motion, American Shoulder and Elbow Surgeons (ASES) score, complications, and implant survivorship free from reoperation or revision. Postoperative imaging was assessed for glenoid radiolucent lines and evidence of aseptic glenoid component loosening (AGL).

RESULTS

A total of 713 shoulders in 666 patients with a mean age of 61 ± 6 years were included in the study at a mean follow-up period of 4.3 years (range, 2.0-9.1 years); male shoulders comprised 50.9% of shoulders. Notable clinical improvements were observed with respect to the visual analog scale pain score (7.0 to 1.4, P < .001), active forward elevation (91° to 155°, P < .001), active external rotation (21° to 50°, P < .001), and the ASES score (38.6 to 82.7, P < .001), with all exceeding the substantial clinical benefit threshold for TSA. The active internal rotation score also showed significant improvement (3.1 to 5.7, P < .001). Glenoid radiolucent lines were identified in 57 TSAs (8.2%), with 1 radiographically loose glenoid component (0.1%). There were 54 complications (7.6%), with postoperative rotator cuff tear as the most common complication (n = 15, 2.1%); only 4 cases (0.6%) of glenoid-related complications (AGL) were observed. The Kaplan-Meier rate of survival free from revision surgery was 98.7% at 1 year, 98.5% at 2 years, and 96.7% at 5 years.

CONCLUSIONS

Hybrid glenoid component fixation of anatomic TSA with a central porous titanium post demonstrated statistically significant and clinically meaningful improvements in pain, range of motion, and ASES scores. Although AGL remains a concern, only 0.6% of TSAs sustained glenoid-related complications at a mean follow-up period of 4.3 years and the rate of survivorship free from revision was 96.7% at 5 years. These favorable clinical findings support the theoretical advantages of hybrid glenoid fixation; however, large comparative investigations with long-term follow-up are needed to validate these results.

Risk factors for complications and revision surgery after anatomic and reverse total shoulder arthroplasty

BACKGROUND

Complications and revisions following anatomic (aTSA) and reverse (rTSA) total shoulder arthroplasty have deleterious effects on patient function and satisfaction. The purpose of this study is to evaluate patient-specific, implant-specific and technique-specific risk factors for intraoperative complications, postoperative complications, and the occurrence of revisions after aTSA and rTSA.

METHODS

A total of 2964 aTSA and 5616 rTSA patients were enrolled in an international database of primary shoulder arthroplasty. Intra- and postoperative complications, as well as revisions, were reported and evaluated. Multivariate analyses were performed to quantify the risk factors associated with complications and revisions.

RESULTS

aTSA patients had a significantly higher complication rate (P = .0026) and a significantly higher revision rate (P < .0001) than rTSA patients, but aTSA patients also had a significantly longer average follow-up (P < .0001) than rTSA patients. No difference (P = .2712) in the intraoperative complication rate was observed between aTSA and rTSA patients. Regarding intraoperative complications, female sex (odds ratio [OR] 2.0, 95% confidence interval [CI] 1.17-3.68) and previous shoulder surgery (OR 2.9, 95% CI 1.73-4.90) were identified as significant risk factors. In regard to postoperative complications, younger age (OR 0.987, 95% CI 0.977-0.996), diagnosis of rheumatoid arthritis (OR 1.76, 95% 1.12-2.65), and previous shoulder surgery (OR 1.42, 95% CI 1.16-1.72) were noted to be risks factors. Finally, in regard to revision surgery, younger age (OR 0.964, 95% CI 0.933-0.998), more glenoid retroversion (OR 1.03, 95% CI 1.001-1.058), larger humeral stem size (OR 1.09, 95% CI 1.01-1.19), larger humeral liner thickness or offset (OR 1.50, 95% CI 1.18-1.96), larger glenosphere diameter (OR 1.16, 95% CI 1.07-1.26), and more intraoperative blood loss (OR 1.002, 95% CI 1.001-1.004) were noted to be risk factors.

CONCLUSIONS

Studying the impact of numerous patient- and implant-specific risk factors and determining their impact on complications and revision shoulder arthroplasty can assist surgeons in counseling patients and guide patient expectations following aTSA or rTSA. Care should be taken in patients with a history of previous shoulder surgery, who are at increased risk of both intra- and postoperative complications.

Sex-related differences in stemless total shoulder arthroplasty

Background

Methods

Results

Conclusion

Surgical Complications After Reverse Total Shoulder Arthroplasty and Total Shoulder Arthroplasty in the United States

Shoulder arthroplasty has become popular in the treatment of degenerative shoulder conditions in the United States. Shoulder arthroplasty usage has expanded to younger patients with increased surgical indications.

Anatomic and reverse shoulder arthroplasty in patients 70 years of age and older: a comparison cohort at early to midterm follow-up

BACKGROUND

Reverse shoulder arthroplasty (RSA) has gained popularity in elderly patients because of its limited reliance on rotator cuff function and high survivorship rates. However, although there are theoretical advantages of RSA over anatomic total shoulder arthroplasty (TSA) in elderly patients, there is little data to guide surgeons on implant selection in this population.

METHODS

Patients were identified from our prospectively collected shoulder arthroplasty registry. We included patients between the age of 50 and 89 years who underwent primary TSA for osteoarthritis with intact rotator cuff or primary RSA for cuff tear arthropathy. The minimum and mean clinical follow-up was 2 and 3.1±1.3 years, respectively. Four patient groups were formed for analysis: (1) TSA age 50-69 years (n=274), (2) TSA age 70-89 years (n=208), (3) RSA age 50-69 years (n=81), and (4) RSA age 70-89 years (n=104). We evaluated age group differences in pain, Constant score, American Shoulder and Elbow Surgeons Standardized Shoulder Assessment Form (ASES) score, patient satisfaction, complications, and revisions.

RESULTS

All groups showed significant improvements from preoperative to final follow-up for all outcome measures (P < .001). Visual analog scale for pain average score decreased from 5.8 preoperatively to 1.1, with no significant differences between groups (TSA P = .180; RSA P = .103). Final ASES scores and improvement from preoperative ASES score between the age groups were not significantly different (TSA P = .520; RSA P = .065). There were no significant differences in outcomes between TSA in patients older than 70 years vs. patients younger than 70 years (all P > .05); however, older RSA patients reported better function during activities of daily living (P = .020) than their younger counterparts. Patients undergoing TSA had a lower revision rate of 3.9% compared with 8.1% in the RSA group (P = .043).

CONCLUSIONS

TSA and RSA are reliable procedures for patients older than 70 years, and have comparable results to their respective patient cohorts younger than 70 years. Although some surgeons anecdotally advocate for RSA in patients older than 70 years with primary osteoarthritis and an intact rotator cuff, we found no difference in outcomes for TSA based on our age cutoff. Given satisfactory results following TSA in patients 70 years of age and older, we do not routinely perform RSA for primary osteoarthritis with an intact rotator cuff solely based on age. Further studies and longer follow-up are needed to determine the optimal implant selection for elderly patients with primary osteoarthritis.

Outpatient shoulder prostheses: Feasibility, acceptance and safety

INTRODUCTION

Outpatient surgery in France is defined by the national authority for health (HAS) as a scheduled surgery enabling same-day discharge without any increased risk to the patient. With the advent of enhanced recovery after surgery, outpatient lower limb arthroplasty has become a common procedure. However, only 1.1% of knee arthroplasties in France were performed on an outpatient basis in 2017.

OBJECTIVES

1) assess early morbidity and mortality after outpatient shoulder arthroplasties to validate eligibility and safety criteria; and 2) assess patient acceptance of outpatient surgery.

METHODS

A single-center study with the following inclusion criteria: primary shoulder arthroplasty, American Society of Anesthesiology (ASA) score I or II, no cognitive impairment, and no coronary artery or thromboembolic diseases. Analgesia was provided by bupivacaine via a peripheral nerve catheter in the first 72 hours followed by oral analgesics. Patients were discharged if the post-anesthetic discharge scoring system (PADSS) was>9/10 and the visual analog scale (VAS) was<5/10. Postoperative telephone interviews were carried out on D1, D2 and D3 to assess pain with the numerical rating scale and to collect data on their analgesic consumption. All patients were seen by an independent observer at one and six months for a clinical and radiologic follow-up and at 90 days during a consultation with the senior surgeon. The primary endpoint was the 90-day morbidity and mortality rate (readmissions, rehospitalizations, and minor and major complications). A satisfaction questionnaire was collected at one and six months.

RESULTS

Thirty-six patients were offered an outpatient shoulder arthroplasty between February 2016 and February 2018: 12 (33%) refused with no valid reasons and 24 patients agreed to the procedure (seven hemiarthroplasties, nine anatomic shoulder arthroplasties and eight reverse shoulder arthroplasties). The mean age at surgery was 70 years (55-82), mean body mass index (BMI) was 26 (21-32) and 14 patients were ASA II (66%). Three patients (12%) refused same-day discharge despite a PADSS score>9/10 and adequate pain management. Two patients (8%) were not discharged home on the same day as the surgery for medical reasons (one for pain and one for high blood pressure). No readmissions or complications were reported for the 19 outpatient arthroplasties. None of the outpatients used opioids. All patients were satisfied with their functional outcome, 84% were satisfied with the outpatient management and 17% felt they were insufficiently monitored and regretted that they were not hospitalized.

CONCLUSIONS

1) outpatient shoulder arthroplasty can be safely proposed to selected patients with low comorbidities, regardless of their age and type of implant; 2) the acceptance rate for outpatient shoulder arthroplasty remained low among our patient population. These results should incite us to better educate patients about outpatient surgery.

LEVEL OF EVIDENCE

IV; retrospective study.

Primary reverse total shoulder arthroplasty in patients older than 80 years: clinical and radiologic outcome measures

BACKGROUND

The use of reverse total shoulder arthroplasty (RTSA) has spread worldwide as a result of an expansion of indications and an aging society. However, the value of RTSA for very old patients is rarely analyzed. This study was conducted to investigate the outcome of primary RTSA in patients older than 80 years.

METHODS

We identified 171 shoulders (159 patients) treated with RTSA at an age of more than 80 years between January 2005 and March 2018. The primary outcome parameters were Subjective Shoulder Value (SSV) and the Constant-Murley score, mortality, complications, and reoperation rates. Secondary outcomes were adverse radiographic outcomes. A minimum follow-up of 1 year was accepted in 14 patients (8%) because of these patients' older age.

RESULTS

We included 171 cases (159 patients; 120 female) with a mean age of 84 ± 3 years (range 80.1-94). The main indication for RTSA was cuff tear arthropathy (43%), isolated rotator cuff tear (22%), and fracture (21%). A total of 136 patients (79%) were eligible for physical examination with a mean follow-up of 41 ± 25 months (12-121). Relative Constant-Murley scores improved significantly from 39% ± 19% to 77% ± 16% and SSV from 31% ± 18% to 74% ± 22%. The range of motion and force improved significantly as well. The surgical site complication rate was 30%, with a reoperation rate of 8% (13 patients) mainly due to fracture and glenoid loosening. The overall mortality was 16% with a mean time to death of 53 ± 31 months (95% confidence interval 15, 120), thereby no higher than the age-adjusted, expected mortality rate without this procedure.

CONCLUSION

Despite a quite high postoperative complication rate, RTSA is a valid therapeutic option in patients older than 80 years, with an unexpectedly low medical complication rate and good to excellent improvement of shoulder function and pain.

Neuroapraxia and early complications after reverse shoulder arthroplasty with glenoid bone grafting

BACKGROUND

Bone grafting during primary reverse shoulder arthroplasty (RSA) is a technique used to restore poor glenoid bone, increase lateralization, and restore abnormal inclination or version. The purpose of this article is to analyze early outcomes of bone grafting during RSA, assessing the influence of technical and patient considerations.

METHODS

In a 4.5-year time period, 137 RSAs with glenoid bone grafting were performed with a minimum 3 months' follow-up. The mean follow-up was 17 months (range, 3-38). The mean age was 71 years (range, 45-89), and body mass index was 28 (range, 19-44). The source of the autografts were humeral head (n = 113) and iliac crest autograft (ICBG; n = 24). The humeral components included 84 onlay and 53 inlay designs.

RESULTS

Overall, there were 16 complications (12%), of which 6 were major (5%) (3 graft nonunions and 3 infections) and 10 minor (8%) (1 carpal tunnel syndrome and 9 transient axillary neuropraxias). Of the 9 axillary neuropraxias, 8 resolved by the most recent follow-up, whereas 1 patient was lost to follow-up. There were 4 reoperations (3%): 2 for glenoid baseplate loosening, 1 for severe notching associated with severe glenoid bone loss, and 1 for deep periprosthetic infection. One additional patient had a baseplate failure and is undergoing further treatment. There was no difference in the occurrence of graft nonunions, revision surgery, or glenoid component loosening when comparing type of graft or humeral component used. There was an association of revision surgery (P = .02) with ICBG and older age at the time of surgery (P = .02) and an association of transient neuroapraxia with onlay humeral components (P = .01) and workers' compensation cases (P = .04).

CONCLUSIONS

There is a high union rate and low complication rate after bone grafting of the glenoid performed with RSA. Transient neuropraxias are the most frequent complication, but the majority resolve within the first postoperative year. These early findings can serve as the basis for future long-term, comprehensive analysis of complications and outcomes after bone grafting during RSA.

Pre-operative factors affecting the indications for anatomical and reverse total shoulder arthroplasty in primary osteoarthritis and outcome comparison in patients aged seventy years and older

BACKGROUND

We evaluated the pre-operative factors affecting anatomical and reverse total shoulder arthroplasty (TSA and RTSA) indications in primary osteoarthritis and compared outcomes in patients aged 70 years and older.

METHODS

Fifty-eight patients received a TSA with an all-polyethylene glenoid component (APGC) or an RTSA with/without glenoid lateralization and the same curved short-stem humeral component. Active anterior and lateral elevation (AAE, ALE), internal and external rotation (IR, ER), pain, and the Constant-Murley score (CS) were recorded pre and post-operatively. Pre-operative rotator cuff (RC) fatty infiltration (FI) and modified Walch glenoid morphology were assessed. Humeral and glenoid component radiological outcomes were recorded.

RESULTS

RTSA were older than TSA patients (p = 0.006), had lower pre-operative AAE (p < 0.001), ALE (p < 0.001), IR (p = 0.002), pain (p = 0.008) and CS (p < 0.001), and greater supraspinatus FI (p < 0.001). At a mean of 28.8 months, both implants yielded significantly different post-operative scores and similar complication rates. Both groups achieved similar post-operative AAE, ER, and IR; ALE was higher in TSA (p = 0.006); and AAE and ALE delta scores were higher in RTSA (p = 0.045 and p = 0.033, respectively). Radiolucent line rates were higher around the TSA APGC than the RTSA baseplate (p = 0.001). High-grade RC FI adversely affected mobility improvement. Humeral cortical thinning was significantly higher in TSA (p = 0.001).

CONCLUSION

RTSA patients were older, had poorer pre-operative active mobility, and had greater RC FI than TSA. Both devices provided good mid-term clinical and ROM improvement.

Comparison of Clinical Outcomes After Anatomic Total Shoulder Arthroplasty and Reverse Shoulder Arthroplasty in Patients 70 Years and Older With Glenohumeral Osteoarthritis and an Intact Rotator Cuff

INTRODUCTION

As the indications for reverse shoulder arthroplasty (RSA) expand beyond traditional cuff tear arthropathy, the role of RSA in elderly patients with glenohumeral arthritis and an intact rotator cuff remains unclear.

METHODS

This retrospective cohort study included 135 patients who underwent RSA or total shoulder arthroplasty (TSA) at a single tertiary orthopedic center between 2005 and 2015 and were 70 years of age or older at the time of surgery. All patients had preoperative advanced imaging confirming an intact rotator cuff but active forward elevation less than 90°. Complications, reoperations, and patient survival were recorded from the medical record. Patient-reported outcomes (Pain visual analog scale, Satisfaction Score, American Shoulder and Elbow Surgeons [ASES], and Western Ontario Osteoarthritis of the Shoulder [WOOS]) and patient-reported range of motion were collected at a minimum of 2 years after procedure.

RESULTS

There was no significant difference in complication rate or revision surgery rate between patients undergoing TSA and RSA (complications 13.7% versus 12.1%, P = 0.810; reoperations 6.9% vs 3.0%, P = 0.418). There were no differences in patient-reported outcome measures between the two groups. Mean pain visual analog scale scores were low in both groups (0.72, SD 1.93 for TSA and 0.31, SD 0.72 for RSA). Satisfaction scores were high (86.1, SD 23.3 for TSA and 91.8, SD 9.0 for RSA, P = 0.286). Mean ASES and WOOS scores were also high in both groups (86 [SD 15.6] for TSA and 83 [SD 12.6] for RSA for ASES [P = 0.400] and 86 [SD 18.3] for TSA and 89 [SD 10.2] for RSA for WOOS [P = 0.400]). One hundred percent of subjects following RSA and 98% of subjects following TSA rated their forward elevation as full or nearly full (>135°) (P = 0.516).

DISCUSSION

Given the good clinical outcomes after both TSA and RSA, there may be an increased role for RSA in this elderly cohort to provide effective treatment of glenohumeral osteoarthritis.

LEVEL OF EVIDENCE

Level III, retrospective comparative study.

Primary reverse shoulder arthroplasty in patients older than 80 years of age

Aims

Reverse shoulder arthroplasty (RSA) reliably improves shoulder pain and function for a variety of indications. However, the safety and efficacy of RSA in elderly patients is largely unknown. The purpose of this study was to report the mortality, morbidity, complications, reoperations, and outcomes of primary RSA in patients aged > 80 years.

Patients and Methods

Between 2004 and 2013, 242 consecutive primary RSAs were performed in patients aged > 80 years (mean 83.3 years (sd 3.1)). Of these, 53 were lost to follow-up before two years and ten had died within two years of surgery, leaving 179 for analysis of survivorship, pain, motion, and strength at a minimum of two years or until revision surgery. All 242 patients were considered for the analysis of 90-day, one-year, and overall mortality, medical complications (90-day and overall), surgical complications, and reoperations. The indications for surgery included rotator cuff arthropathy, osteoarthritis, fracture, the sequela of trauma, avascular necrosis, and rheumatoid arthritis. A retrospective review of the medical records was performed to collect all variables. Survivorship free of revision surgery was calculated at two and five years.

Results

One patient (0.4%) died within the first 90 days. A total of 45 patients (19%) were known to have died at the time of the final follow-up, with a median time to death of 67.7 months (interquartile range 40.4 to 94.7) postoperatively. Medical complications occurred in six patients (3%) and surgical complications occurred in 21/179 patients (12%). Survivorship free from revision was 98.9% at two years and 98.3% at five years; survivorship free from loosening was 99.5% at final follow-up. The presence of peripheral vascular disease correlated with a higher complication rate.

Conclusion

Primary RSA was safe and effective in patients aged > 80 years, with a relatively low rate of medical and surgical complications. Thus, age alone should not be a contraindication to primary RSA in patients aged > 80 years. However, a careful evaluation of comorbidities is required in this age group when considering primary RSA. Cite this article: Bone Joint J 2019;101-B:1520–1525

Predictors of Length of Stay and Discharge Disposition After Shoulder Arthroplasty: A Systematic Review

INTRODUCTION

Identifying patient factors that affect length of stay (LOS) and discharge disposition after shoulder arthroplasty is key in managing patient expectations. In this systematic review, we identify patient-specific covariates that correlate with increased LOS and need for discharge to a facility.

METHODS

We searched biomedical databases to identify associations between patient-specific factors and LOS and discharge disposition after shoulder arthroplasty. We included all studies involving hemiarthroplasty, anatomic shoulder arthroplasty, and reverse shoulder arthroplasty. Reported patient and provider factors were evaluated for their association with increased LOS and discharge to a facility.

RESULTS

Twenty-two studies were identified. Age >65 years, female sex, obesity, and reverse shoulder arthroplasty were associated with extended LOS and correlated with discharge to a facility. Greater hospital and surgeon volume were associated with decreased LOS and decreased risk of discharge to a facility. Local injection of liposomal bupivacaine combined with intravenous dexamethasone was associated with reduced LOS.

DISCUSSION

Patient factors affecting LOS and likelihood of discharge to a facility include age >65 years, female sex, diabetes, obesity, and reverse shoulder arthroplasty. These factors can be used to develop studies to preoperatively predict outcomes after shoulder arthroplasty and to help identify patients who may be at risk of prolonged postoperative admission.

LEVEL OF EVIDENCE

Prognostic level IV.

Modified frailty index is an effective risk-stratification tool for patients undergoing total shoulder arthroplasty

BACKGROUND

Frailty, as quantified by the modified frailty index (mFI), has emerged as a promising method to identify patients at high risk of complications after surgery. Several studies have shown that frailty, as opposed to age, is more predictive of adverse surgical outcomes. We hypothesized that a 5-item mFI could be used to identify patients at elevated risk of complications after total shoulder arthroplasty (TSA).

METHODS

We identified patients aged 50 years or older who underwent TSA in the American College of Surgeons National Surgical Quality Improvement Program database. Pearson χ² analysis and linear regression were used to determine the association of the mFI score with 30-day postoperative complications, reoperation, readmission, length of stay (LOS), adverse hospital discharge, and mortality rate.

RESULTS

The study included 9861 patients with a mean age of 70 years. As the mFI score increased from 0 to 2 or greater, the following rates increased: postoperative complications from 4.2% to 9.4%, readmission from 1.6% to 4.4%, adverse hospital discharge from 6.3% to 19.6%, and LOS from 1.88 days to 2.43 days (P < .001). Multivariate analysis showed that patients with an mFI score of 2 or greater were over twice as likely to sustain a postoperative complication (odds ratio [OR], 2.4; 95% confidence interval [CI], 1.86-3.10), readmission (OR, 2.80; 95% CI, 1.88-4.17), reoperation (OR, 1.82; 95% CI, 1.02-3.25), and adverse hospital discharge (OR, 3.14; 95% CI, 2.51-3.92). These effects were all significantly higher compared with age.

CONCLUSION

Frailty is associated with increased rates of 30-day postoperative complications, readmission, reoperation, adverse hospital discharge, and hospital LOS after TSA. Use of a simple frailty evaluation may help inform decision making and risk assessment when considering TSA.

Results of total shoulder arthroplasty in patients aged 55 years or younger versus those older than 55 years: an analysis of 1135 patients with over 2 years of follow-up

BACKGROUND

The results of anatomic total shoulder arthroplasty (TSA) in younger patients have not been clearly elucidated. The purpose of this study was to compare early outcomes after TSA in patients aged 55 years or younger versus patients older than 55 years.

METHODS

A total of 1135 patients who were treated with TSA for glenohumeral arthritis and had a mean follow-up period of over 4 years were retrospectively reviewed. Etiologies included osteoarthritis (n = 1044), osteonecrosis (n = 35), inflammatory arthritis (n = 34), and post-traumatic arthritis (n = 22). Validated outcome measures, range of motion, and patient satisfaction were recorded. Preoperative and postoperative metrics were compared, and a multivariate analysis was performed to isolate age from sex, body mass index, previous surgery, and diagnosis as independent factors.

RESULTS

Female patients, patients with a history of surgery, and patients with a diagnosis of osteonecrosis were more likely to undergo TSA when aged 55 years or younger. Both age groups showed similar preoperative range of motion and showed no differences in recorded outcome scores. Postoperatively, patients older than 55 years had slightly greater active abduction (P = .004) and internal rotation (P = .030). A higher percentage of patients older than 55 years rated their outcome as better or much better compared with those aged 55 years or younger (P = .003).

CONCLUSIONS

Female sex, a history of surgery, and a diagnosis of osteonecrosis were associated with undergoing TSA when aged 55 years or younger. Despite similar preoperative function and minor differences in postoperative range of motion and outcome scores, patients aged 55 years or younger reported lower overall satisfaction with their TSA.

What Associations Exist Between Comorbidity Indices and Postoperative Adverse Events After Total Shoulder Arthroplasty?

BACKGROUND

Comorbidity indices like the modified Charlson Comorbidity Index (mCCI) and the modified Frailty Index (mFI) are commonly reported in large database outcomes research. It is unclear if they provide greater association and discriminative ability for postoperative adverse events after total shoulder arthroplasty (TSA) than simple variables.

QUESTIONS/PURPOSES

Using a large research database to examine postoperative adverse events after anatomic and reverse TSA, we asked: (1) Which demographic/anthropometric variable among age, sex, and body mass index (BMI) has the best discriminative ability as measured by receiver operating characteristics (ROC)? (2) Which comorbidity index, among the American Society of Anesthesiologists (ASA) classification, the mCCI, or the mFI, has the best ROC? (3) Does a combination of a demographic/anthropometric variable and a comorbidity index provide better ROC than either variable alone?

METHODS

Patients who underwent TSA from 2005 to 2015 were identified from the National Surgical Quality Improvement Program (NSQIP). This multicenter database with representative samples from more than 600 hospitals in the United States was chosen for its prospectively collected data and documented superiority over administrative databases. Of an initial 10,597 cases identified, 70 were excluded due to missing age, sex, height, weight, or being younger than 18 years of age, leaving a total of 10,527 patients in the study. Demographics, medical comorbidities, and ASA scores were collected, while BMI, mCCI and mFI were calculated for each patient. Though all required data variables were found in the NSQIP, the completeness of data elements was not determined in this study, and missing data were treated as being the null condition. Thirty-day outcomes included postoperative severe adverse events, any adverse events, extended length of stay (LOS, defined as > 3 days), and discharge to a higher level of care. ROC analysis was performed for each variable and outcome, by plotting its sensitivity against one minus the specificity. The area under the curve (AUC) was used as a measure of model discriminative ability, ranging from 0 to 1, where 1 represents a perfectly accurate test, and 0.5 indicates a test that is no better than chance.

RESULTS

Among demographic/anthropometric variables, age had a higher AUC (0.587-0.727) than sex (0.520-0.628) and BMI (0.492-0.546) for all study outcomes (all p < 0.050), while ASA (0.580-0.630) and mFI (0.568-0.622) had higher AUCs than mCCI (0.532-0.570) among comorbidity indices (all p < 0.050). A combination of age and ASA had higher AUCs (0.608-0.752) than age or ASA alone for any adverse event, extended LOS, and discharge to higher level of care (all p < 0.05). Notably, for nearly all variables and outcomes, the AUCs showed fair or moderate discriminative ability at best.

CONCLUSION

Despite the use of existing comorbidity indices adapted to large databases such as the NSQIP, they provide no greater association with adverse events after TSA than simple variables such as age and ASA status, which have only fair associations themselves. Based on database-specific coding patterns, the development of database- or NSQIP-specific indices may improve their ability to provide preoperative risk stratification.

LEVEL OF EVIDENCE

Level III, diagnostic study.

The Effect of Race on Early Perioperative Outcomes After Shoulder Arthroplasty: A Propensity Score Matched Analysis

There is a paucity of data on how racial disparities may affect early outcomes following shoulder arthroplasty. The purpose of this study was to evaluate differences in 30-day complications and readmission rates after shoulder arthroplasty based on race. White and black patients who underwent hemiarthroplasty, anatomic or reverse total shoulder arthroplasty (Current Procedural Terminology codes 23470 and 23472) between 2006 and 2015 were identified in the American College of Surgeons National Surgical Quality Improvement Program database. Black patients were propensity score matched 1:4 based on preoperative demographics and comorbidities to white patients. Multivariable analysis was performed to assess postoperative complications based on race. Of the 12,663 patients with shoulder arthroplasty identified, 10,717 (84.6%) were white and 559 (4.4%) were black. Overall, 557 black patients were matched to 2228 white patients, for a total cohort of 2785 patients (mean age, 63.9±11.7 years; female, 61.0%). Surgical indications were similar between black and white patients. The 2 races had similar rates of overall complications, major complications, minor complications, readmissions, and discharge to facility. Mortality was significantly higher among black patients compared with white patients (0.6% vs 0.05%; P=.033). Black patients also experienced longer operative time (mean, 126.4 vs 112.5 minutes; P<.001) and length of stay (mean, 2.4 vs 2.1 days; P<.001). There was a significant disparity with underutilization of shoulder arthroplasty for black patients in the American College of Surgeons National Surgical Quality Improvement Program database. Black and white patients undergoing shoulder arthroplasty experienced similar rates of 30-day complications, readmissions, and discharge to facility. However, black patients experienced greater operative time, total length of stay, and mortality compared with white patients. [Orthopedics. 2019; 42(2):95-102.].

Elective Total Shoulder Arthroplasty in Octogenarians: A Safe Procedure

INTRODUCTION

There has been a lack of studies investigating the perioperative course of total shoulder arthroplasty (TSA) performed in the increasingly octogenarian (≥80 years old) population in a large sample size. The purpose of this study was to compare perioperative complications between primary TSA performed in octogenarians and that performed in younger populations (<70 and 70 to 79 years old) from the National Surgical Quality Improvement Program database.

METHODS

Patients who underwent primary TSA between January 2005 and December 2015 were identified from the National Surgical Quality Improvement Program database and stratified into three age groups: <70, 70 to 79, and ≥80 years old. Patient characteristics and comorbidities were compared between the three groups. Propensity score-matched comparisons were then performed for length of hospital stay, 30-day perioperative complications, and readmissions. Risk factors and reasons for readmission in the octogenarians were characterized.

RESULTS

This study included 3,007 patients who were <70 years old, 2,155 patients who were 70 to 79 years old, and 900 octogenarian patients. Statistical analysis was carried out after matching for propensity score. While no significant differences in perioperative complications were observed between the octogenarians and 70- to 79-year-olds, significantly higher rates of readmission (4.2% versus 1.7%; P = 0.002), pneumonia (1.1% versus 0.0%; P = 0.002), and urinary tract infection (1.8% versus 0.2%; P = 0.001) were found in the octogenarians compared with <70-year-olds. In addition, the octogenarians also had a slightly longer length of hospital stay compared with the younger populations (0.6 days longer than <70-year-olds and 0.4 days longer than 70- to 79-year-olds; both P < 0.001).

CONCLUSION

These data suggest that primary TSA can safely be considered for octogenarians with only mildly increased morbidities. However, greater preoperative optimization or post-discharge care for octogenarians may be warranted to reduce the rates of readmission.

Predicting outstanding results after anatomic total shoulder arthroplasty using percentage of maximal outcome improvement

BACKGROUND

The purpose of this study was to determine whether thresholds in the percentage of maximal improvement in the Simple Shoulder Test (SST) or American Shoulder and Elbow Surgeons (ASES) score exist for predicting "excellent" patient satisfaction after total shoulder arthroplasty (TSA).

METHODS

A retrospective query identified patients who underwent TSA with a minimum of 2 years' follow-up. Preoperative and postoperative SST and ASES scores and postoperative patient satisfaction were recorded. Receiver operating characteristic curve analyses were performed to determine thresholds in the percentage of maximal improvement in the SST and ASES scores that predict excellent satisfaction. Univariate and multivariate analyses determined preoperative factors that predicted achievement of these thresholds.

RESULTS

A total of 301 and 319 patients had at least 2 years' follow-up for the SST score and ASES score, respectively. We determined 72.1% of maximal improvement in the SST score to be the threshold for excellent satisfaction (area under the curve, 0.777; 95% confidence interval, 0.712-0.841; P < .001). We determined 75.6% of maximal improvement in the ASES score to be the threshold for excellent satisfaction (area under the curve, 0.799; 95% confidence interval, 0.743-0.856; P < .001). Both groups showed significant positive correlations between percentage of maximal score achieved and excellent satisfaction (r = 0.396 for SST score [P < .001] and r = 0.325 for ASES score [P < .001]). Younger age was the only independent predictor for achieving the SST score threshold. No independent predictors existed for the ASES score threshold.

CONCLUSION

Achievement of 72.1% of maximal SST score improvement and achievement of 75.6% of maximal ASES score improvement represent thresholds for achievement of excellent satisfaction after TSA. Most preoperative factors did not have an impact on the likelihood of achieving these thresholds.

Identifying appropriate candidates for ambulatory outpatient shoulder arthroplasty: validation of a patient selection algorithm

BACKGROUND

Outpatient total shoulder arthroplasty (TSA) is increasing in frequency, but the selection of patients who are appropriate outpatient joint candidates remains challenging. We propose an algorithm for selecting outpatient TSA candidates, with validation by a cohort of patients from an ambulatory surgery center (ASC).

METHODS

We identified 61 patients who had primary anatomic and reverse TSA. The selection algorithm, which stratifies patients referable to their age and cardiopulmonary comorbidities, was used to choose patients for outpatient surgery. Complications, including cardiopulmonary, thromboembolic, and postoperative wound problems, were recorded.

RESULTS

All 61 patients were discharged from the ASC on the day of surgery. There were no cardiopulmonary events requiring intervention or hospital admission. One patient (2%) required a secondary operation, 3 patients (5%) experienced acute surgical complications, 3 patients (5%) had transient postoperative nausea, and 4 patients (7%) had additional complications within the 90-day episode of care.

CONCLUSIONS

This study is the first to propose a patient selection method for outpatient TSA. Using this algorithm for patient selection produced a low rate of perioperative complications and no hospital admissions. We suggest this algorithm provides an evidence-based method for the standardization of outpatient TSA candidate selection.

Comparison of 90-Day Perioperative Outcomes in Shoulder Arthroplasty Between the Elderly and Nonelderly Patients

Introduction

As life expectancy increases, the incidence of shoulder arthroplasty continues to increase as well. There are few shoulder arthroplasty studies investigating perioperative complication, readmission, and mortality. Furthermore, with bundled payments on the horizon, the cost of shoulder arthroplasty has become a significant issue. Clarifying risk factors for the need for postdischarge acute care will be critical information due to the high cost of such care. The goal of this study was to compare discharge disposition, length of stay (LOS), perioperative complications, readmission, and mortality in elderly and nonelderly cohorts to determine whether age is a risk factor for shoulder arthroplasty.

Materials and Methods

We retrospectively compared 89 elderly patients (80 years or older) and 86 nonelderly patients (79 years or younger) who underwent hemiarthroplasty, total shoulder arthroplasty, reverse total shoulder arthroplasty, or revision shoulder arthroplasty from 2007 to 2015. Baseline characteristics were compared between the 2 cohorts. We then compared discharge disposition, LOS, 90-day complication rate, readmission, and mortality between the 2 cohorts.

Results

Average length of hospitalization and percentage of patients with greater than 2 days of hospitalization were significantly higher in the elderly cohorts. Forty-four percent of the elderly cohorts were discharged to a skilled nursing facility compared to 6% in the nonelderly cohorts (P < .0001). There were no significant differences found in 90-day major complication rate, readmission, or mortality.

Discussion

Shoulder arthroplasty is a valuable surgery for various indications in the elderly population. However, the likelihood of a patient to need a prolonged hospitalization or skilled nursing facility care after surgery are important questions that need to be answered. Our study shows that age over 80 years is a risk factor for prolonged hospitalization and need for skilled nursing facility care after shoulder arthroplasty.

Conclusion

We conclude that elderly patients who undergo shoulder arthroplasty are significantly more likely to have extended hospitalizations and to be discharged to skilled nursing facilities compared to nonelderly patients.

Lack of level I evidence on how to prevent infection after elective shoulder surgery

PURPOSE

Infection is a concern after all orthopedic procedures, including shoulder surgery. This systematic review of literature aimed to determine risk factors for infection as well as the availability and effectiveness of measures utilized to prevent infection after elective shoulder surgery.

METHODS

An electronic database search was performed using MEDLINE (1950-October 2017), EMBASE (1980-October 2017), CINAHL (1982-October 2017), and the Cochrane database to identify studies reporting a risk factor or preventive measure for infection after shoulder surgery.

RESULTS

Fifty-one studies were eligible for inclusion. Risk factors identified for infection were male sex, the presence of hair, receiving an intra-articular cortisone injection within the 3 months prior to surgery, smoking, obesity, and several comorbidities. The only preventive measure with level I evidence was for the use of chlorhexidine wipes for cleansing the skin in the days prior to surgery and for the use of ChloraPrep or DuraPrep over povodine and iodine to prep the skin at the time of surgery. Level II-IV evidence was found for other infection prevention methods such as intravenous antibiotic prophylaxis.

CONCLUSION

There are many risk factors associated with developing an infection after elective shoulder surgery. Many preventive measures have been described which may decrease the risk of infection; however, most lack a high level evidence to support them. The findings of this systematic review are clinically relevant as it has been shown that infection after shoulder surgery results in poor patient-reported outcomes and pose a significant financial burden. As surgeons the goal should be to prevent infections to avoid the morbidity for patients and the increased cost for society.

LEVEL OF EVIDENCE

IV systematic review of literature.

The Effect of Obesity in Shoulder Arthroplasty Outcomes and Complications

The effect of obesity in shoulder arthroplasty has been recently reported in the literature with different and conflicting results. This review analyzes the role of obesity on outcomes and complications in shoulder arthroplasty. Morbid obesity (body mass index >40 kg/m²), more than standard obesity, is associated with a longer operative time, higher complication rate, reoperation rate and superficial infection. Obesity does not have a detrimental effect on functional outcomes. The magnitude of functional improvement in obese patients, however, can be inferior to that in nonobese patients. Obesity and morbid obesity do not increase hospital charges.

Risk factors for failing to achieve improvement after anatomic total shoulder arthroplasty for glenohumeral osteoarthritis

BACKGROUND

Although anatomic total shoulder arthroplasty (TSA) successfully improves pain and function, not all patients improve clinically. This study was conducted to determine patient-related factors for failure to achieve improvement after primary TSA for osteoarthritis at 2 years postoperatively.

METHODS

This prospective study reviewed an institutional shoulder registry for consecutive patients who underwent primary TSA for osteoarthritis from 2007 to 2013 with baseline and 2-year postoperative American Shoulder and Elbow Surgeons (ASES) Standardized Shoulder Assessment Form scores. A failed outcome was defined as (1) a failure to reach the ASES minimal clinically important difference of 16.1 points or (2) revision surgery within 2 years of the index procedure, or both. Univariate and multivariable analyses of clinical and demographic patient factors were performed using logistic regression.

RESULTS

Of 459 arthroplasties that met inclusion criteria, 411 were deemed successful by the aforementioned criteria, and 48 (10.5%) failed to achieve a desirable outcome. Clinical risk factors associated with failure included previous surgery to the shoulder (P = .047), presence of a torn rotator cuff (P = .025), and presence of diabetes (P = .036), after adjusting for age, sex, race, and body mass index. A higher preoperative ASES score at baseline was associated with failure (P < .001).

CONCLUSION

Previous shoulder surgery, a rotator cuff tear requiring repair during TSA, presence of diabetes, surgery on the nondominant arm, and a higher baseline ASES score were associated with a higher risk of failing to achieve improvement after anatomic TSA.

Effect of Age on Outcomes of Shoulder Arthroplasty

CONTEXT

Outcomes of total shoulder arthroplasty (TSA) and reverse total shoulder arthroplasty (RTSA) as a function of age are not well known.

OBJECTIVE

To understand the effects of age on revision rate, mortality, and hospital readmissions.

DESIGN

A retrospective cohort study of prospectively collected data. Using an integrated health care system's shoulder arthroplasty registry, we identified patients who underwent TSA and RTSA between January 2007 and June 2012. Patients were grouped into older (> 75 years) and younger groups (≤ 75 years).

MAIN OUTCOME MEASURES

Differences in outcomes between both age groups.

RESULTS

The TSA cohort had 2007 patients, and 538 (26.8%) were older than age 75 years. Older patients who underwent TSA had higher risks of 1-year mortality (2.0% vs 0.6%; odds ratio = 3.34, 95% confidence interval [CI] = 1.00-11.11, p = 0.049) and readmission within 90 days (7.6% vs 4.4%; odds ratio = 1.75, 95% CI = 1.17-2.63, p = 0.007). The RTSA cohort had 568 patients, and 295 (51.9%) of them were older than age 75 years. Older RTSA patients had a lower risk of revision (3.7% vs 8.1%; hazard ratio = 0.45, 95% CI = 0.24-0.89, p = 0.020).

CONCLUSION

Patient age is one of many important variables that surgeons should consider when performing shoulder arthroplasty. However, the impact of age in the TSA and RTSA populations is different. In the TSA cohort, older patients have higher risk of readmission and mortality. In the RTSA cohort, older patients have lower risk of revision.

Tobacco use predicts a more difficult episode of care after anatomic total shoulder arthroplasty

BACKGROUND

In the current health care environment, it is becoming increasingly important to recognize risks factors that may affect a patient's postoperative outcome. To determine the potential impact of tobacco as a risk factor, we evaluated postoperative pain, narcotic use, length of stay, reoperations, and complications in the global 90-day episode of care for patients undergoing anatomic total shoulder arthroplasty (TSA) who were current tobacco users, former users, or nonusers.

METHODS

Database search identified 163 patients with primary anatomic TSA done for glenohumeral arthritis; these were divided into 3 groups: current tobacco users (28), nonusers (88), and former users (47). All surgeries were done with the same technique and implants.

RESULTS

Patients in the current tobacco use group had significantly higher visual analog scale scores preoperatively and at 12 weeks postoperatively than nonusers and former users. Mean improvement in visual analog scale scores was significantly less in current tobacco users. Cumulative oral morphine equivalent use at 12 weeks was significantly higher in current tobacco users than in nonusers and former users. The average oral morphine equivalent per day was also significantly higher in the current tobacco users than in nonusers and former users. There were no significant differences in length of stay or complications.

CONCLUSIONS

Although length of stay, complication rates, hospital readmissions, and reoperation rates were not significantly different, tobacco users reported increased postoperative pain and narcotic use in the global period after TSA. Former tobacco users were found to have a postoperative course similar to that of nonusers, suggesting that discontinuation of tobacco use can improve a patient's episode of care performance after TSA.

Perioperative Risk Adjustment for Total Shoulder Arthroplasty: Are Simple Clinically Driven Models Sufficient?

BACKGROUND

There is growing interest in value-based health care in the United States. Statistical analysis of large databases can inform us of the factors associated with and the probability of adverse events and unplanned readmissions that diminish quality and add expense. For example, increased operating time and high blood urea nitrogen (BUN) are associated with adverse events, whereas patients on antihypertensive medications were more likely to have an unplanned readmission. Many surgeons rely on their knowledge and intuition when assessing the risk of a procedure. Comparing clinically driven with statistically derived risk models of total shoulder arthroplasty (TSA) offers insight into potential gaps between common practice and evidence-based medicine.

QUESTIONS/PURPOSES

(1) Does a statistically driven model better explain the variation in unplanned readmission within 30 days of discharge when compared with an a priori five-variable model selected based on expert orthopaedic surgeon opinion? (2) Does a statistically driven model better explain the variation in adverse events within 30 days of discharge when compared with an a priori five-variable model selected based on expert orthopaedic surgeon opinion?

METHODS

Current Procedural Terminology codes were used to identify 4030 individuals older than 17 years of age who had TSA in which osteoarthritis was the primary etiology. A logistic regression model for adverse event and unplanned readmission within 30 days was constructed using (1) five variables chosen a priori based on clinic expertise (age, American Society of Anesthesiologists classification ≥ 3, body mass index, smoking status, and diabetes mellitus); and (2) by entering all variables with p < 0.10 in bivariate analysis. We then excluded 870 patients (22%) based on preoperative factors felt to make large discretionary surgery unwise to focus our research on appropriate procedures. Infirm patients have more pressing needs than alleviation of shoulder pain and stiffness. Among the remaining 3160 patients, logistic regression models for adverse event and unplanned readmission within 30 days were constructed in a similar manner to the complete models. The five a priori risk factors used in each model based on clinical expertise were selected by consensus of an expert orthopaedic surgeon panel.

RESULTS

When patients unfit for discretionary surgery were excluded, the clinically driven model found no risk factors and accounted for 1.4% of the variation in unplanned readmission. In contrast, the statistically driven model explained 4.6% of the variation and found operating time (hours) (odds ratio [OR], 1.26; 95% confidence interval [CI], 1.04-1.53) and hypertension requiring medications (OR, 1.95; 95% CI, 1.01-3.76) were associated with unplanned readmission accounting for all other factors. However, neither the clinically driven model (pseudo R², 1.4%) nor statistically driven model (pseudo R², 4.6%) provided much explanatory power. When patients unfit for discretionary surgery were excluded, no factors in the clinically driven model were significant and the model accounted for 0.95% of the variation in adverse events. In the statistically driven model, age (OR, 1.03; 95% CI, 1.01-1.06), men (OR, 1.64; 95% CI, 1.05-2.57), operating time (hours) (OR, 1.27; 95% CI, 1.07-1.52), and high BUN (OR, 3.12; 95% CI, 1.35-7.21) were associated with adverse events when accounting for all other factors, explaining 3.3% of the variation. However, neither the clinically driven model (pseudo R², 0.95%) nor the statistically driven model (pseudo R², 3.3%) provided much explanatory power.

CONCLUSIONS

The observation that a statistically derived risk model performs better than a clinically driven model affirms the value of research based on large databases, although the models derived need to be tested prospectively.

CLINICAL RELEVANCE

Clinicians can utilize our results to understand that clinician intuition may not always offer the best risk adjustment and that factors impacting TSA unplanned readmission and adverse events may be best derived from large data sets. However, because current analyses explain limited variation in outcomes, future studies might look to better define what factors drive the variation in unplanned readmission and adverse events.

The role age plays in the outcomes and complications of shoulder arthroplasty

BACKGROUND

This investigation used age as a continuous variable to estimate implant survival and the risk of complications.

METHODS

Prospectively collected data were used to analyze 5494 consecutive shoulder arthroplasties performed from 1970 to 2012. Patients were a mean age of 67 years. The association between the age at the index procedure and the risk for each outcome was assessed using Cox regression and smoothing spline analysis.

RESULTS

Older age was associated with a decreased risk of revision surgery, revision for mechanical failure, and reoperation but with a higher risk for thromboembolic events. Reoperation rates also decreased in a linear fashion with older ages (P < .001). The risk of revision surgery decreased in a linear fashion between the ages of 40 and 85, with a 3% decreased risk of revision per 1-year increase in age (P < .01). This association held true in a multivariate model and when specific procedures were separated out. Compared with patients aged <50 years, patients aged from 50 to 65 years (P < .001) and those >65 years (P < .001) have decreased risks of revision surgery. The risk of a revision surgery in a patient aged >50 years was significantly decreased (~13% reduction in risk for each year; P < .001). There was a subtle association between older age and decreased rates of infection (P = .01).

CONCLUSIONS

There is a strong association between older age and decreased rates of revision surgery and reoperation after shoulder arthroplasty, with a striking association with decreased rates of mechanical failure. These are important considerations when counseling younger patients regarding their risks.

Comparative outcomes of outpatient and inpatient total shoulder arthroplasty: an analysis of the Medicare dataset

AIMS

The aim of the present study was to compare the 30- and 90-day re-admission rates and complication rates of outpatient and inpatient total shoulder arthroplasty (TSA).

PATIENTS AND METHODS

The United States Medicare Standard Analytical Files database was questioned to identify patients who had undergone outpatient or inpatient TSA between 2005 and 2012. Patient characteristics were compared between the two groups using chi-squared analysis. Multivariate logistic regression analysis was used to control for differences in baseline patient characteristics and to compare the two groups in terms of post-operative complications within 90 days and re-admission within 30 days and 90 days.

RESULTS

A total of 123 347 Medicare subscribers underwent TSA between 2005 and 2012; 3493 (2.8%) had the procedure performed as an outpatient. A significantly greater proportion of patients who underwent TSA as inpatients were women, had a history of smoking, and had a greater incidence of medical comorbidity including diabetes, coronary artery disease, congestive heart failure, and chronic kidney disease (p < 0.05 for all). Re-admission rates were significantly higher for inpatients at both 30 days (0.83% versus 0.60%, p = 0.016, odds ratio 1.8) and 90 days (2.87% versus 2.04%, p < 0.001, odds ratio 1.8). Complications, including thromboembolic events (p < 0.001) and surgical site infection (p = 0.002), were significantly higher in inpatients.

CONCLUSION

Patients who underwent TSA on an outpatient basis were overall younger and healthier than those who had inpatient surgery, which suggests that patient selection was taking place. After controlling for age, gender, and medical conditions, patients who underwent TSA as outpatients had lower rates of 30- and 90-day re-admission and a lower rate of complications than inpatients. Cite this article: Bone Joint J 2017;99-B:934-8.

Risk factors for and timing of adverse events after total shoulder arthroplasty

BACKGROUND

Total shoulder arthroplasty (TSA) is a likely target for future bundled payment initiatives, necessitating accurate preoperative risk stratification. The purpose of this study was to identify risk factors for unplanned readmission and severe adverse events, to risk stratify TSA patients based on these risk factors, and to assess timing of complications after TSA.

METHODS

Data were collected from patients undergoing TSA from 2009 to 2014 in the American College of Surgeons National Surgical Quality Improvement Program. Bivariate and multivariate analyses of risk factors for severe adverse events or readmission were assessed. Patients were risk stratified, and timing of severe adverse events and cause of readmission were evaluated.

RESULTS

The analysis included 5801 TSA patients; 146 (2.5%) suffered severe adverse events, and 158 (2.7%) had a 30-day unplanned readmission. The most common severe adverse events were reoperation (40%), thrombolic event (deep venous thrombosis or pulmonary embolism; 14%), cardiac event (10%), and death (8.2%). Pneumonia (8.9%) and thrombolic event (7.6%) were the most common medically related causes, whereas dislocation (7.6%) and postoperative infection or wound complication (5.1%) were the most common surgical causes for readmission. Multivariate analysis identified inflammatory arthritis (P = .026), male gender (P = .019), age (P < .001), functional status (P = .024), and American Society of Anesthesiologists class 3/4 (P = .01) as independent predictors for unplanned 30-day readmission and all but inflammatory arthritis for severe adverse events (P ≤ .05 for all). Patients with ≥3 risk factors had an 11.56 (P = .002) and 3.43 (P = .013) times increased odds of unplanned readmission and severe adverse events occurring within 2 weeks after surgery, respectively, compared with patients with 0 risk factors.

CONCLUSIONS

Patients at high risk of TSA complications and readmission should be identified preoperatively to improve outcomes and to lower costs. Bundled payment initiatives must account for both patient- and procedure-related risk factors.

Total shoulder arthroplasty: risk factors for intraoperative and postoperative complications in patients with primary arthritis

BACKGROUND

This study evaluated and identified risk factors for the development of intraoperative and postoperative surgical complications in total shoulder arthroplasty in patients with primary osteoarthritis.

METHODS

We evaluated patient-specific factors, including age, sex, body mass index, prior nonarthroplasty surgery, smoking, alcohol consumption, and the American Society of Anesthesiologists (ASA) Physical Status Classification System in 275 patients (76 men, 199 women) with an average age of 68 years (range, 51-85 years). We categorized the number and severity of all complications and correlated these results with the patient-specific factors RESULTS: Twenty-seven complications (9.8%) in 275 shoulder arthroplasties were recorded. We identified 22 patients (8%) with category I complications and 5 (2.8%) with category II complications. Patients with an ASA score of 3 showed an increased likelihood of having a surgical complication compared with the control group with ASA scores of 1 and 2 (odds ratio, 4.28; 95% confidence interval, 1.79-10.20; P < .01). Smokers were more prone to surgical complications than nonsmokers (odds ratio, 5.08; 95% confidence interval, 1.96-13.11; P = .02).

CONCLUSION

Surgical complication rates after anatomic total shoulder arthroplasty in patients with primary osteoarthritis correlate with the patient's overall health status and nicotine consumption. This may be useful for predicting the likelihood of surgical complications and may thus prove important for clinicians to better assess and explain possible risks before surgery.

Effect of smoking on complications following primary shoulder arthroplasty

BACKGROUND

The purpose of this study was to examine the effect of smoking on the incidence of complications after primary anatomic total shoulder arthroplasty (TSA) and reverse shoulder arthroplasty (RSA).

METHODS

All patients who underwent primary TSA or RSA at our institution between 2002 and 2011 and had a minimum 2-year follow-up were included. Smoking status was assessed at the time of surgery. Current smokers, former smokers, and nonsmokers were compared for periprosthetic infection, fractures (intraoperative and postoperative), and loosening after surgery.

RESULTS

The cohort included 1834 shoulders in 1614 patients (814 in smokers and 1020 in nonsmokers). Complications occurred in 73 patients (75 shoulders; 44 in smokers and 31 in nonsmokers). There were 20 periprosthetic infections (16 in smokers and 4 in nonsmokers), 27 periprosthetic fractures (14 in smokers and 13 in nonsmokers), and 28 loosenings (14 in smokers and 14 in nonsmokers). Smokers had lower periprosthetic infection-free survival rates (95.3%-99.4% at 10 years; P = .001) and overall complication-free survival rates (78.4%-90.2%; P = .012) than nonsmokers. Multivariable analyses showed that both current and former smokers had significantly higher risk of periprosthetic infection in comparison with nonsmokers (hazard ratio [HR], 7.27 and 4.56, respectively). In addition, current smokers showed a higher risk of postoperative fractures than both former smokers (HR, 3.63) and nonsmokers (HR, 6.99).

CONCLUSIONS

This study demonstrates that smoking is a significant risk factor of complications after TSA and RSA. These findings emphasize the need for preoperative collaborative interventions, including smoking cessation programs.

Early Hospital Readmission and Mortality Risk after Surgical Treatment of Proximal Humerus Fractures in a Community-Based Health Care Organization

CONTEXT

Surgical treatment for proximal humerus fractures has increased exponentially. Recent health care policies incentivize centers to reduce hospital readmission rates. Better understanding of risk factors for readmission and early mortality in this population will assist in identifying favorable risk-benefit patient profiles.

OBJECTIVE

To identify incidence and risk factors of 30-day hospital readmission rate and 1-year mortality rate after open surgery of proximal humerus fractures.

DESIGN

Retrospective cohort analysis from Kaiser Permanente Southern California Region database.

METHODS

Using International Classification of Diseases, Ninth Revision, diagnosis and procedure codes, all operative proximal humerus fractures were validated. Hospital readmission, one-year mortality, and demographic and medical data were collected. A logistic regression test was performed to assess potential risk factors for outcomes.

RESULTS

From 1387 surgical patients, the 30-day all-cause readmission rate was 5.6%. Forty percent of hospital read-missions were due to surgery-related reasons. Severe liver disease (odds ratio [OR], 3.48, 95% confidence interval [CI] = 1.42-8.55) and LACE (length of stay, acuity of admission, comorbidities, and number of Emergency Department visits in the previous 6 months) index score ≥ 10 (OR, 4.47, 95% CI = 2.54-7.86) were independent risk factors of readmission on multivariate analysis. The 1-year mortality rate was 4.86%. Multivariate analysis showed length of hospital stay (OR 1.11, 95% CI = 1.05-1.19), cancer (OR 3.38, 95% CI = 1.61-7.10), 30-day readmission (OR 3.31, 95% CI = 1.34-8.21), and Charlson comorbidity index greater than or equal to 4 (OR 13.94, 95% CI = 4.40-44.17) predicted higher mortality risk.

CONCLUSION

After open treatment of proximal humerus fractures, there was a 5.6% all-cause 30-day hospital readmission rate. Surgical complications accounted for 40% of read-missions. Severe liver disease and LACE score correlated best with postoperative 30-day readmission risk. Length of hospital stay, preexisting cancer, 30-day readmission, and Charlson comorbidity index were predictive of 1-year mortality.

Reverse shoulder arthroplasty in older patients: is it worth it? A subjective functional outcome and quality of life survey

BACKGROUND

Reverse shoulder arthroplasty (RSA) use has largely spread in the last decade. Doubts still exist, however, about its use in the elder population, because of high risk of complications and possibly limited cost-efficiency of the procedure.

AIMS

Our work was aimed at defining the subjective outcome, complication and satisfaction rate, and perceived recovery of individual autonomy and quality of life after RSA, in a cohort of patients 79 or more years old at the time of surgery.

METHODS

Between 2007 and 2012, 52 patients 79 years old or older received a RSA. In the setting of this study, 27 patients (31 shoulders) were available for clinical evaluation. The ASES score was used for subjective outcome evaluation, while the health-related quality of life was studied with the SF-12 form. An ad hoc questionnaire was used in order to evaluate the satisfaction rate and the recovery in individual autonomy.

RESULTS

At 59,3 months mean follow-up, only one patient required revision due to periprosthetic fracture. ASES score attested at 78.2, and SF-12 scores showed values similar to the general age-matched population. Sensible improvement in perceived quality of life was described by 24 patients. When present, comorbidities were associated with lower results.

DISCUSSION

RSA outcomes in the elderly are good in terms of function, satisfaction and quality of life recovery. Complications appear primarily linked to age-related conditions and comorbidities show critical association with lower results.

CONCLUSIONS

Our study confirms that RSA represents a useful solution for end-stage shoulder disease also in the advanced age population.

Causes of poor postoperative improvement after reverse total shoulder arthroplasty

BACKGROUND

Although reverse total shoulder arthroplasty (RTSA) has been successful in improving pain and function in most patients, some patients fail to improve clinically. The present study used a large registry of RTSA patients to evaluate associations between patient-related factors and poor postoperative improvement after RTSA.

MATERIALS AND METHODS

A prospectively collected shoulder arthroplasty registry was queried for consecutive patients who underwent RTSA from 2007 to 2013. Patients with baseline and minimum 2-year postoperative American Shoulder and Elbow Surgeons (ASES) scores were included. Poor postoperative improvement was defined as a change in the ASES of less than 12 points. Multivariate logistic regression analysis was used to identify independent risk factors.

RESULTS

A total of 150 patients met inclusion and exclusion criteria. Logistic regression revealed that male sex (adjusted odds ratio [OR], 7.9; P = .004), presence of an intact rotator cuff at the time of surgery (adjusted OR, 4.8; P = .025), depression (adjusted OR, 11.2; P = .005), a higher baseline ASES score (P < .001), and higher total number of medical comorbidities (P = .035) were associated with poor postoperative improvement after RTSA.

CONCLUSIONS

Surrogates for better preoperative function after RTSA, such as a higher baseline ASES score and intact rotator cuff at the time of surgery, correlated with poor postoperative improvement. In addition, male sex, depression, and total number of medical comorbidities also correlated with poor postoperative improvement. Interestingly, factors such as patient age and indication for surgery were not found to correlate with poor improvement after RTSA.