“…Over the past decade, there has been increasing interest in performing primary hip and knee replacement in the outpatient setting [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], and rapid recovery protocols have created a natural evolution from the inpatient to outpatient setting [2], [3], [6], [10], [21], [22], [23]. The interest in outpatient arthroplasty also has been fueled by financial considerations including the ability to control costs within the episode of care, the potential for surgeon ownership in ambulatory surgery centers, and the ability of a surgeon to control his or her operating room and surgical care environment more easily in an ambulatory surgery center [1], [5], [8], [24].…”