Can a community hospital successfully transition to outpatient total knee arthroplasty in unselected patients?

BACKGROUND: The removal of total knee arthroplasty (TKA) from the Inpatient-Only list in 2018 created pressure on community hospitals to develop rapid discharge protocols (RAP) to increase outpatient discharge. The purpose of this study, therefore, was to compare the efficacy, safety and barriers in achieving outpatient discharge between the standard discharge protocol and newly developed RAP in unselected, unilateral TKA patients.

METHODS: This retrospective chart review included 288 standard protocol patients and the first 289 RAP patients following unilateral TKA in a community hospital. The RAP focused on patient discharge expectations and post-operative patient management, with no change in post-operative nausea or pain management. Non-parametric tests were performed to compare demographics, perioperative variables and 90-readmission/complication rates between standard and RAP groups, as well as between inpatient and outpatient discharged RAP patients. Multivariate, stepwise logistic regression was performed to evaluate patient demographics and discharge status, presented as odds ratios (OR) and 95% confidence intervals (CI).

RESULTS: Demographics were similar between groups, however, outpatient discharge significantly increased from 22.2% to 85.8% for standard discharge and RAP, respectively (p < 0.001), with no significant difference in post-operative complications. For RAP patients, age (OR:1.062, CI:1.014-1.111; p = 0.011) and female gender (OR:2.224, CI:1.042-4.832; p = 0.039) increased the risk of inpatient and 85.1% of RAP outpatients were discharged home.

CONCLUSIONS: While RAP was successful, 15% of patients required inpatient care and 15% of patients achieving outpatient discharged were not discharged to their home environment, emphasizing the difficulties of achieving true outpatient status in 100% of patients from a community hospital.