Outcomes and Cost Analysis of a Surgical Care Unit for Outpatient Total Joint Arthroplasties Performed at a Tertiary Academic Center

BACKGROUND: Total joint arthroplasty (TJA) has shifted toward being an outpatient surgery with advances in perioperative protocols and patient selection. Most literature on outpatient arthroplasty focuses on the surgery performed in ambulatory centers. This study sought to compare (1) short-term outcomes and (2) the total procedural cost in patients who underwent TJAs at a tertiary academic center and were discharged from the accelerated surgical care unit (SCU) vs the inpatient floor unit. METHODS: This is a retrospective review of 1231 procedures (637 total knee arthroplasties and 594 total hip arthroplasties) performed between January 2020 and May 2021 at 1 tertiary academic center. The minimum required follow-up duration was 90 days. Patients were divided into 2 cohorts based on discharge location (SCU vs inpatient). Patient demographics, medical comorbidities, 90-day hospital returns, and revisions were evaluated with univariate and multivariate analyses. Of the 1231 patients, 1092 had available cost data that were analyzed by a univariate analysis. RESULTS: Patients discharged from the SCU were younger (P < .01), with lower American Society of Anesthesiologists scores (P = .04). SCU patients trended toward fewer 90-day hospital returns and revisions; however, these results were not significant. The overall encounter cost for TJA was significantly lower in patients discharged from the SCU (P < .01). Cost remained significantly less at 30 and 90 days postoperatively (P < .01). CONCLUSIONS: The present study represents the current activity at many large tertiary American academic medical centers. Results demonstrate that a unit for accelerated discharge after TJAs in a tertiary academic center is safe and cost-effective. With proper implementation, its development will enhance arthroplasty programs at a large tertiary academic center.