Transition to outpatient total hip and knee arthroplasty: experience at an academic tertiary care center

Background: Interest in outpatient total hip arthroplasty (THA) and total knee arthroplasty (TKA) has increased recently as part of value-based care and early recovery protocols. Outpatient pathways require significant paradigm shifts, are not used widely, and are mostly implemented at outpatient surgery centers or orthopedic specialty hospitals. In this article, we report on the outcomes of implementation of an outpatient arthroplasty protocol at a tertiary care academic medical center.

Methods: We performed a retrospective review on a series of 105 consecutive patients who underwent THA or TKA following our newly implemented outpatient arthroplasty protocol. We compared these patients to a group of inpatient arthroplasty patients from the same time period.

Results: Eighty-three of 105 (79%) patients were successfully discharged home on the day of surgery. Successful same-day discharge was predicted by early ambulation (P = .01), TKA over THA (P = .04), and shorter duration of surgery (P = .01). General anesthesia correlated with better early ambulation distances (P = .03) and a lower incidence of urinary retention (P = .049). The outpatient readmission and complication rates were 0.95% and 1.9%, respectively, whereas the matched inpatient rates were 3.7% and 2.9%, respectively.

Conclusions: Outpatient THA and TKA in a well-selected patient is feasible in an academic multidisciplinary tertiary care hospital, with complication rates approximating inpatient surgery. The findings reported here can be used to further optimize outpatient arthroplasty protocols.