Time-Driven Activity-based Costing and Outcomes of Same-Day Discharge vs Inpatient Robotic Partial and Radical Nephrectomy

To assess the outcomes, total healthcare utilization, and cost savings for same-day discharge (SDD) vs inpatient robotic-assisted partial nephrectomy (RAPN) and robotic-assisted radical nephrectomy (RARN). We compared 146 RAPNs and 65 RARNs consecutively performed as SDD (RAPN=21, RARN=9) vs inpatient (RAPN=125, RARN=56) from April 2015 to May 2023 at two academic medical centers. We collected baseline demographics, perioperative characteristics, and 30-day complications. We applied the Time-Driven Activity-Based Costing analysis to compare total costs of RAPN and PARN throughout the cycle of care, including inpatient vs SDD. Baseline demographics and comorbidities were similar between patients undergoing inpatient vs SDD RAPN and RARN. One Clavien-Dindo grade II complication (3.3%) requiring readmission due to wound infection for antibiotics occurred after SDD RAPN; no complications occurred after SDD RARN. Two unscheduled office or emergency department visits (6.7%) occurred after SDD RAPN for surgical-site infection and urinary retention. SDD vs inpatient RAPN and RARN demonstrated a $3091 (18%) and $4003 (25%) overall cost reduction, respectively. SDD RAPN and RARN result in cost savings of 18%-25% without a difference in complications, and thereby improves value-based care for appropriately selected patients.