Relative Complications and Trends of Outpatient Total Shoulder Arthroplasty

Shortened length of stay and its impact on total shoulder arthroplasty expenses

Background

The volume of both anatomic and reverse total shoulder arthroplasty (TSA) has increased in the United States over the last decade. A reduction in length of stay (LOS) postoperatively is a clear way to reduce hospital costs and labor burden. This study aimed to quantify how the LOS reduction has impacted inpatient TSA costs.

Methods

The study queried the National Inpatient Sample (NIS) database to identify individuals undergoing inpatient elective TSA for osteoarthritis from 2012 to 2020. Total costs were determined by multiplying the hospital's cost-to-charge ratio from NIS by the total charges, inflation-adjusted to 2020. Bivariate linear regression assessed the LOS trend, and multivariate gamma regression with log link modeled TSA total cost and charge, adjusting for patient variables and operational year. Predicted total cost and charge were plotted postmodel fitting. Additionally, LOS was standardized to the 2012 mean for model predictions.

Results

Numbers are reported as national estimates. In all, 527,300 patients were identified with an average age of 69 years, and 47% were male. The average LOS in 2012 was two days and had a decreasing trend to 1.2 days in 2020 (ß = -0.01, p < .001). Multivariate analysis revealed that increased LOS postoperatively was an independent predictor of increased total charges and costs of surgery after adjustment for covariates including overall health of the patient. Between 2012 and 2020, there was an observed increase in total costs despite accounting for the decrease in LOS. The total costs of surgery would have increased 11.8% ($18,597.03 to $20,792.84) from 2012 to 2020 if surgeons maintained the 2012 LOS; total costs would have increased 5.5% ($18,597.03 to $19,628.92) from 2012 to 2020.

Conclusion

Total hospital costs for total shoulder replacement increased by 23% from 2012 to 2020. This increase in total cost was simultaneously dampened by the concurrent reduction in LOS, from 2 days to 1.2 days. By recognizing the tangible link between shorter lengths of stay and economic savings, healthcare institutions can make informed decisions that promote both fiscal responsibility and quality patient care.Level of Evidence:: 3.

Rate of reimbursement for 22-modifier in shoulder surgery

Background

The 22-modifier is a reimbursement amendment designed by the Current Procedural Terminology (CPT) to reflect increased case complexity. When a CPT code is shared between more than 1 procedure or is used to capture a breadth of procedures, a 22-modifier can be used to acknowledge the increased workload in a particular procedure when compared to the standard procedure. We hypothesize that discrepancies exist among 22-modifier reimbursement rates in shoulder surgery, and that payers, particularly commercial, are reimbursing at lower rates for extensive surgical efforts. Identifying potential reimbursement shortcomings can open dialog between payers and surgeons to ensure transparency and fairness.

Methods

22-modifier amendments for total shoulder arthroplasty (TSA) (CPT code 23472), revision of TSA (23474), and arthroscopic rotator cuff repair (29827) occurring from October 31, 2018 to March 23, 2022 were queried, resulting in 566 instances from 11 surgeons at a single site. Financial data were collected from the billing department, while patient demographics and operative reports were collected from medical records. The billing staff requested reimbursement identically on all claims, excluding 1 surgeon, who also sent a reimbursement cover sheet detailing case complexity. Request for reimbursement was submitted for some cases without an operative report. Complexity justifications included obesity (body mass index >30 or >35), reverse TSA, revision procedures, massive repair, surgeon-determined prolonged length of procedure, no justification for 22-modifier listed, and undiagnosed hypertension which created a medical emergency.

Results

In total, 150 (26.5%) of 22-modifier cases were successfully reimbursed. TSA, revision of TSA, and arthroscopic rotator cuff repair had a reimbursement rate of 40.7%, 35.3%, and 13.0%, respectively. Of successful claims, Medicare reimbursed 75.3% and commercial only 26.7%. The highest rates of reimbursement justifications were length of procedure (41.7%), reverse shoulder arthroplasty (40.6%), and revision procedure (32.4%). The surgeon who included the cover sheet was successfully reimbursed (41.6%) more frequently than 2 surgeons with similar case volume (18.3% and 19.5%).

Conclusion

Criteria for successful reimbursement of the 22-modifier are ambiguous, complicating reimbursement efforts. Clinicians should consider concentrating efforts on obtaining 22-modifier reimbursement from Medicare in cases with increased length of procedure, as well as revision procedures and reverse shoulder arthroplasties. Surgeons may receive higher reimbursement rates with the addition of a cover sheet detailing the complexity of the procedure and any associated increases in complication rates or costs. Clarification from insurance carriers is needed to determine what constitutes a 22-modifier.

Outcomes of ambulatory versus outpatient hospital-based surgical center shoulder arthroplasty: complications, readmissions, and charges

PURPOSE

The rising demand for primary total shoulder arthroplasty (TSA) has spurred interest in comparing the safety and cost-effectiveness of outpatient TSA in ambulatory surgical centers (ASCs) versus hospital-based centers (HSCs). This study evaluates ASCs and HSCs for medical complications, readmission rates, implant complications, and costs.

METHODS

This retrospective cohort study used the PearlDiver Mariner Database to identify patients undergoing primary TSA in ASCs or HSCs, assessing medical complications, readmissions, implant issues, and costs. ASC patients were matched in a 1:5 ratio to HSC patients by age, sex, region, and Elixhauser Comorbidity Index (ECI). Logistic regression analyzed the impact of ASC versus HSC settings on complications and readmissions, while Welch's t-tests compared costs. Statistical significance was determined by a P value less than or equal to 0.05.

RESULTS

ASCs showed lower odds of pulmonary embolism (OR = 0.69; P = 0.04), total medical complications (OR = 0.89; P = 0.01), prosthetic joint dislocation (OR = 0.43; P = 0.05), and total implant-related complications (OR = 0.85; P = 0.03), but a higher 90-day readmission rate (OR = 1.22; P < 0.01). ASCs also offered significant cost savings on the day of surgery ($4600 vs. $11,100; P < 0.01) and for 90-day total costs ($6600 vs. $13,500; P < 0.01) compared to HSCs.

CONCLUSION

Outpatient primary TSA in ASCs offers comparable safety with substantially lower costs than HSCs. Despite higher readmission rates, ASCs represent a viable, cost-effective alternative.

Current trends in shoulder arthroplasty - Are the trends backed by evidence?

Shoulder arthroplasty is the third most common joint replacement performed worldwide and remains a rapidly innovative area for improvement in patient care. This article explores the evidence surrounding current trends aiming to improve patient outcome in all forms of shoulder arthroplasty.

Racial and gender disparities in utilization of outpatient total shoulder arthroplasties

BACKGROUND

Utilization in outpatient total shoulder arthroplasties (TSAs) has increased significantly in recent years. It remains largely unknown whether utilization of outpatient TSA differs across gender and racial groups. This study aimed to quantify racial and gender disparities both nationally and by geographic regions.

METHODS

168,504 TSAs were identified using Medicare fee-for-service inpatient and outpatient claims data and beneficiary enrollment data from 2020 to 2022Q4. The percentage of outpatient cases, defined as cases discharged on the same day of surgery, was evaluated by racial and gender groups and by different census divisions. A multivariate logistics regression model controlling for patient sociodemographic information (White vs. non-White race, age, gender, and dual eligibility for both Medicare and Medicaid), hierarchical condition category (HCC) score, hospital characteristics, year fixed effects, and patient residency state fixed effects was performed.

RESULTS

The TSA volume per 1000 beneficiaries was 2.3 for the White population compared with 0.8, 0.6, and 0.3 for the Black, Hispanic, and Asian population, respectively. A higher percentage of outpatient TSAs were in White patients (25.6%) compared with Black patients (20.4%) (P < .001). The Black TSA patients were also younger, more likely to be female, more likely to be dually eligible for Medicaid, and had higher HCC risk scores. After controlling for patient sociodemographic characteristics and hospital characteristics, the odds of receiving outpatient TSAs were 30% less for Black than the White group (odds ratio 0.70). Variations were observed across different census divisions, with South Atlantic (0.67, P < .01), East North Central (0.56, P < .001), and Middle Atlantic (0.36, P < .01) being the 4 regions observed with significant racial disparities. Statistically significant gender disparities were also found nationally and across regions, with an overall odds ratio of 0.75 (P < .001).

DISCUSSION

Statistically significant racial and gender disparities were found nationally in outpatient TSAs, with Black patients having 30% (P < .001) fewer odds of receiving outpatient TSAs than White patients, and female patients with 25% (P < .001) fewer odds than male patients. Racial and gender disparities continue to be an issue for shoulder arthroplasties after the adoption of outpatient TSAs.

A Systematic Review of Patient Selection Criteria for Outpatient Total Shoulder Arthroplasty

The utilization of total shoulder arthroplasty (TSA) is increasing, driving associated annual health care costs higher. Opting for outpatient over inpatient TSA may provide a solution by reducing costs. However, there is no single set of accepted patient selection criteria for outpatient TSA. Here, the authors identify and systematically review 14 articles to propose evidence-based criteria that merit postoperative admission. Together, the studies suggest that patients with limited ability to abmluate independently or a history of congestive heart failure may benefit from postoperative at least one night of hospital based monitoring and treatment.

Outpatient vs. inpatient total shoulder arthroplasty: complication rates, clinical outcomes, and eligibility parameters

Background

Improvements in total shoulder arthroplasty (TSA), fast-track surgery, multimodal anesthesia, and rehabilitation protocols have opened up the possibility of outpatient care that is now routinely practiced at our European institution. The first objective of this study was to define the TSA outpatient population and to verify that outpatient management of TSA does not increase the risk of complications. The second objective was to determine patient eligibility parameters and the third was to compare functional outcomes and identify influencing factors.

Methods

The study included 165 patients who had primary TSA (106 outpatient and 59 inpatient procedures). The operative technique was the same for both groups. Demographics, complications, readmissions, and revisions were collected. American Society of Anesthesiologists, Constant, American Shoulder and Elbow Surgeons, University of California Los Angeles shoulder, and Shoulder Pain and Disability Index scores were obtained preoperatively and at 1.5, 6, and 12 months postoperatively. Satisfaction and visual analog scale pain scores also were documented. Statistical analysis was completed using multivariate linear regression.

Results

Outpatients were significantly younger and had lower American Society of Anesthesiologists scores than inpatients. The rates of complications, readmissions, and reoperations were not significantly different between groups. Outpatient surgery was not an independent risk factor for complications. At 1.5 months, better outcomes were noted in the outpatient group for all scores, and these reached statistical significance. Distance to home, dominant side, operative time, and blood loss were not associated with functional results. Multivariate analysis demonstrated that outpatient care was significantly associated with improved scores at 1.5 months and did not affect functional outcomes at 6 and 12 months.

Conclusion

This study reports the results of routine outpatient TSA within a European healthcare system. TSA performed in an outpatient setting was not an independent risk factor for complications and seemed to be an independent factor in improving early functional results.

Inpatient or outpatient total elbow arthroplasty: a comparison of patient populations and 30-day surgical outcomes from the American College of Surgeons National Surgical Quality Improvement Program

BACKGROUND

Total elbow arthroplasty (TEA) is uncommon, but growing in incidence. Traditionally an inpatient operation, a growing number are performed outpatient, consistent with general trends in orthopedic surgery. The aim of this study was to compare TEA outcomes between inpatient and outpatient surgical settings. Secondarily, we sought to identify patient characteristics that predict the operative setting.

METHODS

Patient data were collected from the American College of Surgeons National Quality Improvement Program. Preoperative variables, including patient demographics and comorbidities, were recorded, and baseline differences were assessed via multivariate regression to predict operative setting. Multivariate regression was also used to compare postoperative complications within 30 days.

RESULTS

A total of 468 patients, 303 inpatient and 165 outpatient procedures, were identified for inclusion. Hypoalbuminemia (odds ratio [OR], 2.5; P=0.029), history of chronic obstructive pulmonary disorder or pneumonia (OR, 2.4; P=0.029), and diabetes mellitus (OR, 2.5; P=0.001) were significantly associated with inpatient TEA, as were greater odds of any complication (OR, 4.1; P<0.001) or adverse discharge (OR, 4.5; P<0.001) and decreased odds of reoperation (OR, 0.4; P=0.037).

CONCLUSIONS

Patients undergoing inpatient TEA are generally more comorbid, and inpatient surgery is associated with greater odds of complications and adverse discharge. However, we found higher rates of reoperation in outpatient TEA. Our findings suggest outpatient TEA is safe, although patients with a higher comorbidity burden may require inpatient surgery. Level of evidence: III.

Outpatient Versus Inpatient Total Shoulder Arthroplasty: A Matched Cohort Analysis of Postoperative Complications, Surgical Outcomes, and Reimbursements

INTRODUCTION

There has been a trend toward performing arthroplasty in the ambulatory setting. The primary purpose of this study was to compare outpatient and inpatient total shoulder arthroplasties (TSAs) for postoperative medical complications, healthcare utilization outcomes, and surgical outcomes.

METHODS

Patients who underwent outpatient TSA or inpatient TSA with a minimum 5-year follow-up were identified in the PearlDiver database. These cohorts were propensity-matched based on age, sex, Charlson Comorbidity Index, smoking status, and obesity (body mass index > 30). All outcomes were analyzed using chi square and Student t-tests where appropriate.

RESULTS

Outpatient TSA patients had markedly lower rates of various 90-day medical complications. Outpatient TSA patients had lower risk of aseptic loosening at 2 years postoperation and lower risk of periprosthetic joint infection at 5 years postoperation relative to inpatient TSA patients. Outpatient TSA reimbursements were markedly lower than inpatient TSA reimbursements at the 30-day, 90-day, and 1-year postoperative intervals.

CONCLUSION

This study found patients undergoing outpatient TSA to be at lowers odds for both postoperative medical and surgical complications compared with those undergoing inpatient TSA. Despite increased risk of postoperative healthcare utilization for readmissions and emergency department visits, outpatient TSA was markedly less expensive at every postoperative time point assessed.

Introducing A Day-Case Shoulder Arthroplasty Pathway In The UK - How We Did It

Background

As the demand for elective orthopaedics grows, day-case arthroplasty is gaining popularity. The aim of this study was to create a safe and reproducible pathway for day-case shoulder arthroplasty (DCSA) based upon a literature review and discussion with the local multidisciplinary team (MDT).

Methods

A literature review was performed using OVID MEDLINE and Embase databases reporting 90-day complication and admission rates following DCSA. Minimum follow-up was 30 days. Day-case was defined as discharge on the same day of surgery.

Results

The literature review revealed a mean 90-day complication rate of 7.7% [range, 0-15.9%] and mean 90-day readmission rate of 2.5% [range 0-9.3%]. A pilot protocol was devised based upon the literature review and consisted of 5 phases: (1) pre-operative assessment, (2) intra-operative phase, (3) post-operative phase, (4) follow-up, and (5) readmission protocol. This was presented, discussed, amended, and ultimately ratified by the local MDT. In May 2021 the unit successfully completed its first day-case shoulder arthroplasty.

Discussion

This study proposes a safe and reproducible pathway for DCSA. Patient selection, well-defined protocols and communication within the MDT are important factors to achieve this. Further studies with extended follow-up will be needed to gauge long-term success within our unit.

Outpatient shoulder arthroplasty in the COVID-19 era: 90-day complications and risk factors

BACKGROUND

With the COVID-19 pandemic placing an increased burden on health care systems, shoulder arthroplasties are more commonly being performed as outpatient procedures. The purpose of this study was to characterize the 90-day episode-of-care complications of consecutive shoulder arthroplasties defaulted for outpatient surgery without using a prior algorithm for patient selection and to assess for their risk factors. We hypothesized that outpatient shoulder arthroplasty would be a safe procedure for all patients, regardless of patient demographics and comorbidities.

METHODS

A retrospective review of consecutive patients who underwent planned outpatient anatomic or reverse total shoulder arthroplasty between March 2020 and January 2022 with 3-month follow-up was performed. All patients were scheduled for outpatient surgery regardless of medical comorbidities. Patient demographics; pre/postoperative patient-reported outcomes including visual analog scale, subjective shoulder value, and American Shoulder and Elbow Surgeons score; pre/postoperative range of motion; and complications were collected from medical chart review. Multivariate logistic regression was used to identify predictors of the following outcomes: 1. Unplanned overnight hospital stay, 2. 90-day unplanned emergency department (ED)/clinic visit, 3. 90-day hospital readmission, 4. 90-day complications requiring revision.

RESULTS

One hundred twenty-seven patients (47% male, 17% tobacco users, 18% diabetics) with a mean age 69 ± 9 years were identified, of whom 92 underwent reverse total shoulder arthroplasty and 35 underwent anatomic total shoulder arthroplasty. All patient-reported outcomes and range of motion were significantly improved at 3 months. There were 15 unplanned overnight hospital stays (11.8%) after the procedure. Within 90 days postoperatively, there were 17 unplanned ED/clinic visits (13.4%), 7 hospital readmissions (5.5%), and 4 complications requiring revision (3.1%). Factors predictive of unplanned overnight stay included age above 70 years (odds ratio [OR], 36.80 [95% confidence interval [CI], 2.20-615.49]; P = .012), tobacco use (OR, 12.90 [95% CI, 1.23-135.31]; P = .033), and American Society of Anesthesiologists status of 3 (OR, 13.84 [95% CI, 1.22-156.57]; P = .034). The only factor predictive of unplanned ED/clinic visit was age over 70 years old (OR, 7.52 [95% CI, 1.26-45.45]; P = .027). No factors were predictive of 90-day hospital readmission or revision.

CONCLUSION

Outpatient shoulder arthroplasty is a safe procedure with excellent outcomes and low rates of readmissions and can be considered as the default plan for all patient undergoing shoulder arthroplasty. Patients who are above 70 years of age, use tobacco, and have ASA score of 3, however, may be less suitable for outpatient arthroplasty and should be counseled regarding the higher risk of unplanned overnight hospitalization.

A systematic review of clinical outcomes for outpatient vs. inpatient shoulder arthroplasty

BACKGROUND

Outpatient shoulder arthroplasty is growing in popularity as a cost-effective and potentially equally safe alternative to inpatient arthroplasty. The aim of this study was to investigate literature relating to outpatient shoulder arthroplasty, looking at clinical outcomes, complications, readmission, and cost compared to inpatient arthroplasty.

METHODS

We conducted a systematic review of Medline, Embase and Cochrane Library databases from inception to 6 April 2020. Methodological quality was assessed using MINORS and GRADE criteria.

RESULTS

We included 17 studies, with 11 included in meta-analyses and 6 in narrative review. A meta-analysis of hospital readmissions demonstrated no statistically significant difference between outpatient and inpatient cohorts (OR = 0.89, p = 0.49). Pooled post-operative complications identified decreased complications in those undergoing outpatient surgery (OR = 0.70, p = 0.02). Considerable cost saving of between $3614 and $53,202 (19.7-69.9%) per patient were present in the outpatient setting. Overall study quality was low and presented a serious risk of bias.

DISCUSSION

Shoulder arthroplasty in the outpatient setting appears to be as safe as shoulder arthroplasty in the inpatient setting, with a significant reduction in cost. However, this is based on low quality evidence and high risk of bias suggests further research is needed to substantiate these findings.

Current Status Regarding the Safety of Inpatient Versus Outpatient Total Shoulder Arthroplasty: A Systematic Review

BACKGROUND

Surgeons have begun to transition total shoulder arthroplasty (TSA) to the outpatient setting in order to contain costs and reallocate resources.

PURPOSE

The purpose of this systematic review was to evaluate the safety and cost of outpatient TSA by assessing associated complication rates, clinical outcomes, and total treatment charges.

METHODS

The MEDLINE, Embase, and Cochrane Library online databases were queried in March 2020 for studies on outpatient shoulder arthroplasty. Inclusion criteria were (1) a study population undergoing TSA, (2) discharge on the day of surgery, and (3) inclusion of at least 1 reported outcome.

RESULTS

Of 20 studies identified that met inclusion criteria, 14 were comparative studies involving an inpatient control group, 2 of which were matched by age and comorbidities. The remaining studies used control groups consisting of inpatient TSAs who were older or more medically infirm according to American Society of Anesthesiologists (ASA) or Charlson Comorbidity Index (CCI) scores. The combined average age of the outpatient and inpatient groups was 66.5 and 70.1 years, respectively. Patients who underwent outpatient TSA had similar rates of readmissions, emergency department visits, and perioperative complications in comparison to inpatients. Patients also reported comparably high levels of satisfaction with outpatient procedures. Four economic analyses demonstrated substantial cost savings with outpatient TSA in comparison to inpatient surgery.

CONCLUSION

In carefully selected patients, outpatient TSA appears to be equally safe but less resource intensive than inpatient arthroplasty. Nonetheless, there remains a need for larger prospective studies to decisively characterize the relative safety of outpatient TSA among patients with similar baseline health.

Comparing complications of outpatient management of slipped capital femoral epiphysis and Blount’s disease: A database study

BACKGROUND

Currents trends in pediatric orthopaedics has seen an increase in surgeries being successfully completed in an outpatient setting. Two recent examples include slipped capital femoral epiphysis (SCFE) and Blount’s disease. Surgical indications are well-studied for each pathology, but to our knowledge, there is an absence in literature analyzing safety and efficacy of inpatient vs outpatient management of either condition. We believed there would be no increase in adverse outcomes associated with outpatient treatment of either conditions.

AIM

To investigate whether outpatient surgery for SCFE and Blount’s disease is associated with increased risk of adverse outcomes.

METHODS

The 2015-2017 American College of Surgeons National Surgical Quality Improvement Program Pediatric Registries were used to compare patient characteristics, rates of complications, and readmissions between outpatient and inpatient surgery for SCFE and Blount’s disease.

RESULTS

Total 1788 SCFE database entries were included, 30% were performed in an outpatient setting. In situ pinning was used in 98.5% of outpatient surgeries and 87.8% of inpatient surgeries (P < 0.0001). Inpatients had a greater percent of total complications than outpatients 2.57% and 1.65% respectively. Regarding Blount’s disease, outpatient surgeries constituted 41.2% of the 189 procedures included in our study. The majority of inpatients were treated with a tibial osteotomy, while the majority of outpatients had a physeal arrest (P < 0.0001). Complications were encountered in 7.4% of patients, with superficial surgical site infections and wound dehiscence being the most common. 1.6% of patients had a readmission. No differences in complication and readmission risks were found between inpatients and outpatients.

CONCLUSION

The current trend is shifting towards earlier discharges and performing procedures in an outpatient setting. This can be safely performed for a large portion of children with SCFE and Blount’s disease without increasing the risk of complications or readmissions. Osteotomies are more commonly performed in an inpatient setting where monitoring is available.

Appropriate patient selection for outpatient shoulder arthroplasty: a risk prediction tool

BACKGROUND

The transition from inpatient to outpatient shoulder arthroplasty critically depends on appropriate patient selection, both to ensure safety and to counsel patients preoperatively regarding individualized risk. Cost and patient demand for same-day discharge have encouraged this transition, and a validated predictive tool may help decrease surgeon liability for complications and help select patients appropriate for same-day discharge. We hypothesized that an accurate predictive model could be created for short inpatient length of stay (discharge at least by postoperative day 1), potentially serving as a useful proxy for identifying patients appropriate for true outpatient shoulder arthroplasty.

METHODS

A multicenter cohort of 5410 shoulder arthroplasties (2805 anatomic and 2605 reverse shoulder arthroplasties) from 2 geographically diverse, high-volume health systems was reviewed. Short inpatient stay was the primary outcome, defined as discharge on either postoperative day 0 or 1, and 49 patient outcomes and factors including the Elixhauser Comorbidity Index, sociodemographic factors, and intraoperative parameters were examined as candidate predictors for a short stay. Factors surviving parameter selection were incorporated into a multivariable logistic regression model, which underwent internal validation using 10,000 bootstrapped samples.

RESULTS

In total, 2238 patients (41.4%) were discharged at least by postoperative day 1, with no difference in rates of 90-day readmission (3.5% vs. 3.3%, P = .774) between cohorts with a short length of stay and an extended length of stay (discharge after postoperative day 1). A multivariable logistic regression model demonstrated high accuracy (area under the receiver operator characteristic curve, 0.762) for discharge by postoperative day 1 and was composed of 13 variables: surgery duration, age, sex, electrolyte disorder, marital status, American Society of Anesthesiologists score, paralysis, diabetes, neurologic disease, peripheral vascular disease, pulmonary circulation disease, cardiac arrhythmia, and coagulation deficiency. The percentage cutoff maximizing sensitivity and specificity was calculated to be 47%. Internal validation showed minimal loss of accuracy after bias correction for overfitting, and the predictive model was incorporated into a freely available online tool to facilitate easy clinical use.

CONCLUSIONS

A risk prediction tool for short inpatient length of stay after shoulder arthroplasty reaches very good accuracy despite requiring only 13 variables and was derived from an underlying database with broad geographic diversity in the largest institutional shoulder arthroplasty cohort published to date. Short inpatient length of stay may serve as a proxy for identifying patients appropriate for same-day discharge, although perioperative care decisions should always be made on an individualized and holistic basis.

Safety and Cost Effectiveness of Outpatient Total Shoulder Arthroplasty: A Systematic Review

INTRODUCTION

Changes in healthcare policy have driven many hospital-based surgeries to the outpatient environment. Multiple studies have shown outpatient total shoulder arthroplasty (TSA) is a safe alternative to the inpatient setting. This systematic review evaluates patient selection, perioperative protocols, complications, costs, patient satisfaction, and clinical outcomes of outpatient TSA and compares these with their inpatient counterparts.

METHODS

The Emnbase, Medline, and CENTRAL databases were queried on April 30, 2020, for outpatient TSA studies, identifying 232 articles, with 21 meeting inclusion criteria. This involved 25,808 and 231,408 patients undergoing outpatient and inpatient TSA, respectively. Failed same-day discharge, readmissions, revision surgeries, cost, and complications among outpatient TSA were aggregated when raw numbers were available. Statistical significance for comparisons among outpatient and inpatient TSA within individual studies was alpha = 0.05.

RESULTS

Ten studies evaluated same-day discharge rate, with 440 of 446 patients (98.7%) meeting the goals. Fourteen studies evaluated readmissions, revision surgeries, and complications, with readmissions in 238 of 6,133 patients (3.9%), revision surgeries in 32 of 1,484 patients (2.1%), and complications in 376 of 4,977 patients (7.6%). Readmission rates were similar between inpatients and outpatients, with only one study finding more readmissions after inpatient TSA. Complications were more common in inpatient TSA in five studies. Outpatient TSA demonstrated a charge reduction of $25,509 to $53,202 per patient, and patient satisfaction after outpatient TSA was "good to excellent" in more than 95% of patients. Patient selection for outpatient TSA used patient age, medical comorbidities, social support, living proximity to location of surgery, and lack of preoperative opioid use.

DISCUSSION

Outpatient TSA in appropriately selected patients is a safe and cost-effective alternative to inpatient TSA. However, the literature is limited to national database or small retrospective studies. Large prospective, cohort studies are necessary to further assess differences in complication profiles between outpatient and inpatient TSA.

LEVEL OF EVIDENCE

Level IV; systematic review.

Outpatient Shoulder Arthroplasty-A Systematic Review

Objective

Recent reports have shown that outpatient shoulder arthroplasty (SA) may be a safe alternative to inpatient management in appropriately selected patients. The purpose was to review the literature reporting on outpatient SA.

Methods

A systematic review of publications on outpatient SA was performed. Included publications discussed patients who were discharged on the same calendar day or within 23 hours from surgery. Articles were categorized by discussions on complications, readmissions, and safety, patient selection, pain management strategies, cost effectiveness, and patient and surgeon satisfaction.

Results

Twenty-six articles were included. Patients undergoing outpatient SA were younger and with a lower BMI than those undergoing inpatient SA. Larger database studies reported more medical complications for patients undergoing inpatient compared to outpatient SA. Articles on pain management strategies discussed both single shot and continuous interscalene blocks with similar outcomes. Both patients and surgeons reported high levels of satisfaction following outpatient SA, and cost analysis studies demonstrated significant cost savings for outpatient SA.

Conclusion

In appropriately selected patients, outpatient SA can be a safe, cost-saving alternative to inpatient care and may lead to high satisfaction of both patients and physicians, though further studies are needed to clarify appropriate utilization of outpatient SA.

Short stay after shoulder arthroplasty does not increase 90-day readmissions in Medicare patients compared with privately insured patients

BACKGROUND

As of January 1, 2021, total shoulder arthroplasty was removed from the Medicare inpatient-only list, reflecting a growing belief in the potential merits of same-day discharge regardless of insurance type. It is yet unknown whether Medicare populations, which frequently have more severe comorbidity burdens, would experience higher complication rates relative to privately insured patients, who are often younger with fewer comorbidities. Given the limited number of true outpatient cohorts available to study, discharge at least by postoperative day 1 may serve as a useful proxy for true same-day discharge, and we hypothesized that these Medicare patients would have increased 90-day readmission rates compared with their privately insured counterparts.

METHODS

Data on 4723 total shoulder arthroplasties (anatomic in 2459 and reverse in 2264) from 2 large, geographically diverse health systems in patients having either Medicare or private insurance were collected. The unplanned 90-day readmission rate was the primary outcome, and patients were stratified into those who were discharged at least by postoperative day 1 (short inpatient stay) and those who were not. Patients with private insurance (n = 1845) were directly compared with those with Medicare (n = 2878), whereas cohorts of workers' compensation (n = 198) and Medicaid (n = 58) patients were analyzed separately. Forty preoperative variables were examined to compare overall health burden, with the χ² and Wilcoxon rank sum tests used to test for statistical significance.

RESULTS

Medicare patients undergoing short-stay shoulder arthroplasty were not significantly more likely than those with private insurance to experience an unplanned 90-day readmission (3.6% vs. 2.5%, P = .14). This similarity existed despite a substantially worse comorbidity burden in the Medicare population (P < .05 for 26 of 40 factors). Furthermore, a short inpatient stay did not result in an increased 90-day readmission rate in either Medicare patients (3.6% vs. 3.4%, P = .77) or their privately insured counterparts (2.5% vs. 2.4%, P = .92). Notably, when the analysis was restricted to a single insurance type, readmission rates were significantly higher for reverse shoulder arthroplasty compared with total shoulder arthroplasty (P < .001 for both), but when the analysis was restricted to a single procedure (anatomic or reverse), readmission rates were similar between Medicare and privately insured patients, whether undergoing a short or extended length of stay.

CONCLUSIONS

Despite a substantially more severe comorbidity profile, Medicare patients undergoing short-stay shoulder arthroplasty did not experience a significantly higher rate of unplanned 90-day readmission relative to privately insured patients. A higher incidence of reverse shoulder arthroplasty in Medicare patients does increase their overall readmission rate, but a similar increase also appears in privately-insured patients undergoing a reverse indicating that Medicare populations may be similarly appropriate for accelerated-care pathways.

A Risk Stratification Nomogram to Predict Inpatient Admissions After Total Shoulder Arthroplasty Among Patients Eligible for Medicare

The goal of this study was to establish a risk stratification nomogram to aid in determining the need for inpatient admission among patients who were eligible for Medicare and were undergoing primary total shoulder arthroplasty (TSA). The American College of Surgeons National Surgical Quality Improvement Program database was queried to identify all patients older than 65 years who underwent primary TSA between 2006 and 2016. The primary outcome measure was inpatient admission, as defined by hospital length of stay longer than 2 days. Multiple demographic, comorbid, and peri-operative variables were used in a multivariate logistic regression model to yield a risk stratification nomogram. A total of 1514 inpatient and 6020 out-patient admissions were analyzed. Age older than 80 years (odds ratio [OR], 2.69; P<.0001; 95% CI, 2.21-3.27), female sex (OR, 2.18; P<.0001; 95% CI, 1.90-2.51), dependent functional status (OR, 1.69; P<.0001; 95% CI, 1.2-2.38), dialysis (OR, 3.48; P=.029; 95% CI, 1.14-10.63), admission from an inpatient facility (OR, 1.76; P<.0001; 95% CI, 1.70-1.82), and inflammatory arthritis (OR, 1.69; P<.02; 95% CI, 1.25-13.78) were the greatest determinants of inpatient stay. The resulting predictive model showed acceptable discrimination and calibration. Our model enabled reliable and straightforward identification of the most suitable candidates for inpatient admission among patients who were eligible for Medicare and were undergoing primary TSA. Patients who were receiving dialysis, who had dyspnea at rest, and who had bleeding disorders were more likely to be admitted as inpatients after TSA. Larger multicenter studies are necessary to externally validate the proposed predictive nomogram. [Orthopedics. 2022;45(1):43-49.].

Outpatient Shoulder Arthroplasty Patient Selection, Patient Experience, and Cost Analyses: A Systematic Review

BACKGROUND

The utilization of outpatient shoulder arthroplasty has been increasing. With increasing pressure to reduce costs, further underscored by the coronavirus (COVID-19) pandemic, many health-care organizations will move toward outpatient interventions to conserve inpatient resources. Although abundant literature has shown the advantages of outpatient total hip arthroplasty (THA) and total knee arthroplasty (TKA), there is a relative paucity describing outpatient shoulder arthroplasty. Thus, the purpose of this study was to summarize the peer-reviewed literature of outpatient shoulder arthroplasty with particular attention to patient selection, patient outcomes, and cost benefits.

METHODS

The PubMed, Cumulative Index to Nursing and Allied Health Literature (CINAHL), and Embase databases were queried according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. All articles on outpatient shoulder arthroplasty were included. Data on patient selection, patient outcomes, and cost analyses were recorded. Patient outcomes, including complications, reoperations, and readmissions, were analyzed by weighted average.

RESULTS

Twenty-three articles were included for analysis. There were 3 review articles and 20 studies with Level-III or IV evidence as assessed per The Journal of Bone & Joint Surgery Level of Evidence criteria. Patient selection was most often predicated on age <70 years, body mass index (BMI) <35 kg/m2, absence of active cardiopulmonary comorbidities, and presence of home support. Complications and readmissions were not common and either improved or were equivalent to those of inpatient shoulder arthroplasty. Patient satisfaction was high in studies of short-term and intermediate-term follow-up. The proposed cost benefit ranged from $747 to $53,202 with outpatient shoulder arthroplasty.

CONCLUSIONS

The published literature to date supports outpatient shoulder arthroplasty as an effective, safe, and cost-reducing intervention with proper patient selection.

LEVEL OF EVIDENCE

Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

Comparison of outpatient vs. inpatient anatomic total shoulder arthroplasty: a propensity score–matched analysis of 20,035 procedures

Background

As the proportion of anatomic total shoulder arthroplasty (aTSA) operations performed at outpatient surgical sites continues to increase, it is important to evaluate the clinical implications of this evolution in care.

Methods

Patients who underwent TSA for glenohumeral osteoarthritis from 2007 to 2019 were identified in the American College of Surgeons National Surgical Quality Improvement Program registry. Demographic data and 30-day outcomes were collected, and patients were separated into inpatient and outpatient (defined as same day discharge) groups. To control for confounding variables, a propensity score–matching algorithm was utilized. Outcomes included 30-day adverse events, readmission, and operative time.

Results

A total of 20,035 patients who underwent aTSA between 2007 and 2019 were identified: 18,707 inpatient aTSAs and 1328 outpatient aTSAs. On matching, there were no significant differences in patient characteristics between inpatient and outpatient cohorts. Patients who underwent outpatient aTSA were less likely to experience a serious adverse event when compared with their matched inpatient aTSA counterparts (outpatient: 1.1% vs. inpatient: 2.1%, P = .03). Outpatient aTSA was associated with similar rates of all specific individual complications and readmissions (1.5% vs. 1.9%, P = .31).

Conclusion

When compared with a propensity score–matched cohort of inpatient counterparts, the present study found outpatient aTSA was associated with significantly reduced severe adverse events and similar readmission rates. These findings support the growing use of outpatient aTSA in appropriately selected patients.

Trends in outpatient versus inpatient total shoulder arthroplasty over time

Background

The purpose of this study was to investigate the safety of outpatient and inpatient total shoulder arthroplasty (TSA) and to investigate changes over time.

Methods

Patients undergoing primary TSA during 2006-2019 as part of the American College of Surgeons National Surgical Quality Improvement Program were identified. Patients were divided into an early cohort (2006-2016, 12,401 patients) and a late cohort (2017-2019, 12,845 patients). Outpatient procedures were defined as those discharged on the day of surgery. Patient comorbidities and rate of adverse events within 30 days postoperatively were compared with adjustment for baseline characteristics using standard multivariate regression.

Results

There was a significant reduction in complications over time when considering all cases (5.69% in the early cohort vs. 3.67% in the late cohort, adjusted relative risk [RR] = 0.65, 95% confidence interval [CI] = 0.58-0.73, P < .001). The rate of complications decreased over time among inpatients (5.80% vs. 3.90%, adjusted RR = 0.68, 95% CI = 0.60-0.76, P < .001). However, there was no difference in the rate of complications among outpatients over time (1.98% vs. 1.38%, adjusted RR = 0.64, 95% CI = 0.28-1.47, P = .293). There were significantly more complications among inpatients vs. outpatients in both the early and late cohorts (early: 5.80% vs. 1.98%, adjusted RR = 2.57, 95% CI = 1.24-5.34, P = .011, late: 3.90% vs. 1.38%, adjusted RR = 2.28, 95% CI = 1.39-3.74, P = .001). TSA became more common in elderly patients over 70 years of age over time in both the inpatient and outpatient cohorts, whereas fewer young patients (aged 18-59 years) underwent TSA in the late cohorts than in the early cohorts for both the inpatient and outpatient samples (P < .001).

Conclusion

The overall complication rate of TSA has decreased over time as outpatient TSA has become increasingly common. When contemporary data are examined, the complication rate of outpatient procedures has remained constant over time while that of inpatient procedures decreased, despite the changing demographics of patients undergoing TSA. This indicates that outpatient TSA remains a safe procedure as patient selection criteria have evolved, while the safety of inpatient TSA continues to improve.

Day case versus inpatient total shoulder arthroplasty: A systematic review and meta-analysis

BACKGROUND

A number of papers have been published comparing the safety and efficacy of day case and inpatient anatomic or reverse total shoulder arthroplasty. However, no systematic review of the literature has been published to date. The aim of this review was to determine if day case total shoulder arthroplasty (length of stay <24 h) leads to similar outcomes as standard-stay inpatients (length of stay ≥24 h).

METHODS

The US National Library of Medicine (PubMed/MEDLINE), EMBASE, and the Cochrane Database of Systematic Reviewers were queried for publications utilizing keywords that were pertinent to total shoulder arthroplasty, day case, outpatient and inpatient, clinical or functional outcomes, and complications. In order to determine the quantitative impact of day case total shoulder arthroplasty on readmission and revision rate, a meta-analysis was performed on articles that observed 30- or 90-day readmission or revision.

RESULTS

Eight articles were found to be suitable for inclusion in the present study which included 6103 day case total shoulder arthroplasty and 147,463 inpatient total shoulder arthroplasty. Following meta-analysis, there was no significant difference among patients who underwent day case total shoulder arthroplasty compared to inpatient total shoulder arthroplasty regarding revision rates (OR: 1.001; 95% CI: 0.721-1.389; p = 0.995) and 30-day readmission rates (OR: 0.940; 95% CI: 0.723-1.223; p = 0.646). In contrast, patients who underwent day case total shoulder arthroplasty were less likely to have a readmission within 90 days compared to their inpatient counterparts (OR: 0.839; 95% CI: 0.704-0.999; p = 0.049). Two out of eight studies reported comparable baseline clinical characteristics among groups, while five studies reported significant differences and one study did not provide information regarding clinical characteristics, such as medical comorbidities or American Society of Anaesthesiologists'(ASA) score. No significant difference among groups was found in all or almost all studies regarding mortality rates, and rates of cardiac complications, cerebrovascular events, thromboembolic events, pulmonary complications, cardiac complications, and nerve complications. Finally, results were rather conflicting regarding the correlation of day case total shoulder arthroplasty to the rate of surgical site infections.

CONCLUSIONS

This study showed that day case total shoulder arthroplasty might lead to similar rates of mortality, complications, revisions, and readmissions compared to inpatient total shoulder arthroplasty when used in a selected population of younger, healthier, and more male patients. In contrast, there was no consensus regarding the impact of day case total shoulder arthroplasty on the rate of surgical site infections. Finally, further research of higher quality is required to establish patient demographic criteria, ASA score, or comorbidity index cut off that might be used to define day case-treated patients who seem to have equivalent outcomes compared to inpatient-treated patients.Level of evidence: Systematic review of level III studies (lowest level included).

Is outpatient shoulder arthroplasty safe? A systematic review and meta-analysis

BACKGROUND

Amid rising health care costs and recent advances in surgical and anesthetic protocols, the rate of outpatient joint arthroplasty has risen steadily in recent years. Although the safety of outpatient total knee arthroplasty and total hip arthroplasty has been well established, outpatient shoulder arthroplasty is still in its infancy. The purpose of this study was to synthesize the current literature and provide further data regarding the outcomes and safety of outpatient shoulder arthroplasty.

METHODS

A systematic review was conducted following the standard PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. Included were studies that evaluated the outcomes of patients undergoing outpatient total shoulder arthroplasty (TSA) or reverse TSA. Meta-analysis was conducted using Mantel-Haenszel statistics to generate odds ratios (ORs) and their corresponding 95% confidence intervals (CIs) comparing outpatient and inpatient shoulder arthroplasty.

RESULTS

Twelve studies were included, with a total of 194,513 patients, of whom 7162 were outpatients. Of the studies, 8 were level III and 4 were level IV. The average age of the outpatients was 66.6 years, and the average age of the inpatients was 70.1 years. The overall OR for complications was significantly lower in outpatients (OR, 0.40; 95% CI, 0.35-0.45) than in inpatients. There was no significant difference in rates of 90-day readmission (OR, 0.88; 95% CI, 0.75-1.03), revision (OR, 0.96; 95% CI, 0.65-1.41), and infection (OR, 0.93; 95% CI, 0.64-1.35) when comparing outpatients with inpatients.

CONCLUSION

Outpatient TSA, in an appropriately selected patient population, is safe and results in comparable patient outcomes to those of inpatient shoulder arthroplasty. Given the expected increase in the number of patients requiring TSA, surgeons, hospital administrators, and insurance carriers should strongly consider the merits of a cost- and care-efficient approach to total shoulder replacement.

Prevalence of Shoulder Arthroplasty in the United States and the Increasing Burden of Revision Shoulder Arthroplasty

Existing data on the epidemiology of shoulder arthroplasty are limited to future projections of incidence. However, the prevalence of shoulder arthroplasty (the number of individuals with a shoulder arthroplasty alive at a certain time and its implications for the burden of revision procedures) remains undetermined for the United States. Hence, the purpose of this study was to estimate the prevalence of shoulder arthroplasty in the United States.

The Feasibility of Outpatient Shoulder Arthroplasty: Risk Stratification and Predictive Probability Modeling

Whether shoulder arthroplasty can be performed on an outpatient basis depends on appropriate patient selection. The purpose of this study was to identify risk factors for adverse events (AEs) following shoulder arthroplasty and to generate predictive models to improve patient selection. This was a retrospective review of prospectively collected data using a single institution shoulder arthroplasty registry as well as the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) database, including subjects undergoing hemiarthroplasty, total shoulder arthroplasty (TSA), and reverse TSA. Predicted probability of suitability for same-day discharge was calculated from multivariable logistic models for different patient subgroups based on age, comorbidities, and Charlson/Deyo Index scores. A total of 2314 shoulders (2079 subjects) in the institutional registry met inclusion criteria for this study. Younger age, higher body mass index (BMI), male sex, and prior steroid injection were all significantly associated with suitability for discharge, whereas preoperative narcotic use, comorbidities (heart disease and anemia/other blood disease), and Charlson/Deyo Index score of 2 were associated with AEs that might prevent same-day discharge. Compared with TSA, reverse TSA was associated with less suitability for discharge (P=.01). On querying the ACS-NSQIP database, 15,254 patients were identified. Female sex, BMI less than 35 kg/m², American Society of Anesthesiologists class III/IV, preoperative anemia, functional dependence, low pre-operative albumin, and hemiarthroplasty were associated with unsuitability for discharge. Males 55 to 59 years old with no comorbidities nor history of narcotic use formed the lowest risk subgroup. Transfusion is the primary driver of AEs. Strategies to avoid this complication should be explored. Risk stratification will improve the ability to identify patients who can safely undergo outpatient shoulder arthroplasty. [Orthopedics. 2021;44(2):e215-e222.].

Dexamethasone decreases postoperative opioid and antiemetic use in shoulder arthroplasty patients: a prospective, randomized controlled trial

BACKGROUND

Multimodal pain control can be beneficial in relieving postoperative pain and limiting narcotic use following orthopedic procedures. Additionally, with increasing interest in outpatient arthroplasty procedures, providers have interest in adequate early postoperative pain control and complications. The purpose of this study was to investigate the effect of dexamethasone on pain, postoperative nausea and vomiting, and length of stay following total shoulder arthroplasty (TSA) and reverse total shoulder arthroplasty (RTSA).

METHODS

One hundred twelve patients undergoing TSA or RTSA by a single surgeon were assessed for inclusion in this investigation. We performed a prospective randomized controlled trial to investigate the effect of 10 mg of dexamethasone administered within 90 minutes of surgery. Primary outcome assessed was the average morphine equivalent use over the first 24 hours postsurgery. Secondary outcomes included postoperative visual analog scale (VAS) scores, antiemetic use, postoperative nausea and vomiting, and complications.

RESULTS

A total of 75 patients were included in the final analysis, with 32 patients (42.7%) randomized to the control group and 43 (57.3%) randomized to the dexamethasone group. Body mass index was significantly greater in the control group (33.8 vs. 30.3, P = .014); otherwise, there were no significant demographic differences between groups. Average ondansetron use was significantly lower in the dexamethasone group compared with controls for the 0- to 4-hour interval (0.1 vs. 0.9 mg, respectively, P = .006) and was lower overall for the first 24 hours (0.3 vs. 1.0 mg, P = .025). Differences in VAS scores were significantly lower in the dexamethasone group at all time points (P < .05 for all). The average VAS score over the 24-hour period for the dexamethasone group was also significantly lower than the controls (3 vs. 6, P < .001). Morphine equivalent use was significantly lower in the dexamethasone group compared with controls at 12-16 hours (1.7 vs. 4.0 mg, respectively, P = .004) and at 16-20 hours (1.7 vs. 3.4 mg, respectively, P = .006). When averaged over the first 24 hours, morphine equivalent was also significantly lower in the dexamethasone group (16.1 vs. 25.4 mg, P = .007). There was no significant difference in glucose control or complications between groups.

CONCLUSION

Dexamethasone decreases opioid requirements in the first 24 hours following surgery, provides improved pain control, and decreases antiemetic use following shoulder arthroplasty. Dexamethasone is an important multimodal adjunct for controlling pain and postoperative nausea and vomiting following primary TSA.

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.

Outpatient Total Shoulder Arthroplasty: A Systematic Review Evaluating Outcomes and Cost-Effectiveness

BACKGROUND

Orthopaedic surgical procedures are increasingly being performed in outpatient settings. The drive for cost reduction without compromising patient safety and outcomes has increased interest in outpatient total shoulder arthroplasty (TSA). The primary aim of this study was to perform a review of the evidence regarding the outcomes and cost-effectiveness of outpatient TSA.

METHODS

A search of the PubMed, Embase, and Cochrane Library databases was performed using several keywords: "outpatient," "shoulder replacement," "ambulatory," "day case," "day-case," "shoulder arthroplasty," "same day," and "shoulder surgery." Studies that were published from May 2010 to May 2020 in the English language were considered. Research design, questions, and outcomes were recorded for each study. Qualitative and quantitative pooled analysis was performed on the data where appropriate.

RESULTS

Twenty studies met the inclusion criteria. Six retrospective studies compared complication rates between inpatient and outpatient cohorts and found no significant differences. Four studies found that the complication rate was lower in the outpatient cohort compared with the inpatient cohort. In a pooled analysis, the readmission rate after outpatient TSA was significantly lower than the readmission rate after inpatient TSA at 30 days (0.65% vs. 0.95%) and 90 days (2.03% vs. 2.87%) postoperatively (p < 0.05 for both). Four studies evaluated the cost of outpatient TSA in comparison with inpatient TSA. All of these studies found that TSA at an ambulatory surgery center was significantly less costly than TSA at an inpatient facility, both for the health-care system and for the patient. Patient selection for outpatient TSA may depend on several important factors, including the presence or absence of diabetes, chronic obstructive pulmonary disease, chronic kidney disease, congestive heart failure, poor functional status, higher American Society of Anesthesiologists class, chronic narcotic use, higher body mass index, and older age.

CONCLUSIONS

Our results show that patient selection is the most critical factor that predicts the success of outpatient TSA. While outpatient TSA is significantly less costly than inpatient TSA, patients undergoing outpatient TSA are more likely to be healthier than patients undergoing inpatient TSA. More high-quality long-term studies are needed to add to this body of evidence.

LEVEL OF EVIDENCE

Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

The safety of outpatient total shoulder arthroplasty: a systematic review and meta-analysis

Purpose

To meet the increasing demands of total shoulder arthroplasty (TSA) while reducing its financial burden, there has been a shift toward outpatient surgery. This systematic review and meta-analysis aimed to evaluate the safety of outpatient TSA.

Methods

The primary objective was to compare re-admission rates and postoperative complications in outpatient versus inpatient TSA. The secondary objectives were functional outcomes and costs. PubMed, Google Scholar, and Web of Science were searched until March 28, 2020. The inclusion criteria were studies reporting at least complications or readmission rates within a period of 30 days or more.

Results

Ten level III retrospective studies were included with 7637 (3.8%) and 192,025 (96.2%) patients underwent outpatient and inpatient TSA, respectively. Outpatient TSA had relatively younger and healthier patients. There were no differences between outpatient and inpatient arthroplasty for 30- and 90-day readmissions. Furthermore, unadjusted comparisons demonstrated significantly less total and major surgical complications, less total, major, and minor medical complications in favour of outpatient TSA. However, subgroup analyses demonstrated that there were no significant differences in all complication if the studies had matched controls and regardless of data source (database or nondatabase studies). The revision rates were similar between both groups at a 12–24 months follow-up. Two studies reported a significant reduction in costs in favour of outpatient TSA.

Conclusion

This study highlights that outpatient TSA could be a safe and effective alternative to inpatient TSA in appropriately selected patients. It was evident that outpatient TSA does not lead to increased readmissions, complications, or revision rates. A potential additional benefit of outpatient TSA was cost reduction.

Supplementary Information

The online version contains supplementary material available at 10.1007/s00264-021-04940-7.

Differences in 30-day outcomes between inpatient and outpatient total elbow arthroplasty (TEA)

BACKGROUND

As the health care system in the United States shifts toward value-based care, there has been increased interest in performing total joint arthroplasty in the outpatient setting to optimize costs, outcomes, and patient satisfaction. Several studies have demonstrated success in performing ambulatory total knee and hip arthroplasty. The purpose of this study was to compare short-term outcomes and complications after total elbow arthroplasty (TEA) across the inpatient and outpatient operative settings.

METHODS

The American College of Surgeons National Quality Improvement Program database was queried to identify 575 patients undergoing primary TEA using the Current Procedural Terminology code 24363. Of this sample, 458 were inpatient and 117 were outpatient procedures. Propensity score matching using a 3:1 inpatient-to-outpatient ratio was performed to account for baseline differences in several variables-age, sex, body mass index class, American Society of Anesthesiologists class, and various comorbidities-between the inpatient and outpatient groups. After matching, the rates of various short-term outcomes and complications were compared between the inpatient and outpatient groups.

RESULTS

Inpatient TEA was associated with a higher rate of complications relative to outpatient TEA, including non-home discharge (14.9% vs. 7.5%, P = .05), unplanned hospital readmission (7.4% vs. 0.9%, P = .01), surgical complications (7.6% vs. 2.6%, P = .04), and medical complications (3.6% vs. 0.0%, P = .04).

CONCLUSION

Outpatient TEA has a lower short-term complication rate than inpatient TEA. Outpatient TEA should be considered for patients for whom such a discharge pathway is feasible. Future research should focus on risk stratification of patients and specific criteria for deciding when to pursue outpatient TEA.

Incidence and safety profile of outpatient unicompartmental knee arthroplasty

BACKGROUND

Outpatient surgery is an increasingly attractive option for patients undergoing procedures with established, acceptable risk profiles. Benefits of outpatient surgery include cost savings, enhanced patient experience and improved resource allocation at busy hospitals. The purpose of this study was to compare 90-day complication and readmission rates for patients undergoing unicompartmental knee arthroplasty (UKA) in the outpatient as opposed to the inpatient setting.

METHODS

Patients who underwent UKA (CPT code 27446) between 2007 and 2016 were retrospectively selected from a national private insurance database. Patients were defined as ambulatory if their coded location of procedure was in an ambulatory surgery center or as an in-hospital outpatient. Postoperative complications were identified using the Reportable Center for Medicare Services (CMS) Complication Measures. Risks of complications were compared between the inpatient and outpatient cohorts using multivariate logistic regression controlling for age, gender, and comorbidities.

RESULTS

2600 patients undergoing ambulatory UKA and 5084 patients undergoing inpatient UKA were identified. The percentage of UKA procedures performed on an outpatient basis significantly increased over the course of the study (14.5% to 58.1%, p < 0.001). After adjusting for age, gender, and comorbidities, ambulatory surgery was found to be associated with a decreased risk of postoperative transfusion (OR 0.28; p < 0.001) and pneumonia (OR 0.23; p = 0.008) and there was a trend towards decreased 90-day readmission risk (OR = 0.83; p = 0.062).

CONCLUSION

Ambulatory discharge following UKA is increasing in popularity, does not increase risk for perioperative complications or readmission, and may even portend a safer post-operative course.