Disproportionate burden of septic versus aseptic revision total shoulder arthroplasty: a comparative assessment of operative time and work relative value units

Abstract

Periprosthetic infection (PJI) remains a challenging complication in total shoulder arthroplasty. Surgical treatment options can include 1 or 2-stage revision procedures, temporizing articulating spacers, and resection arthroplasty, with many cases resulting in transfer of patient care to a tertiary care center. While these cases can impose significant cost and clinical burden for both surgeons and hospital systems, there is limited data about the operative time investment and reimbursement compared to aseptic revision cases. The purpose of the current study was to compare work relative value units and operative times for aseptic and septic shoulder arthroplasty revision procedures. We hypothesize that staged, PJI-related revision shoulder arthroplasty is associated with significant differences in operative time and work relative value units assigned as compared to aseptic revisions. This study utilized data obtained from the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP). Inclusion criteria included all patients that underwent a revision total shoulder arthroplasty between January 1, 2010 and December 31, 2018. Procedures were grouped as either aseptic or septic revisions and further stratified into 1 stage and each stage of a 2-stage revision for septic cases. The RVU-to-dollar conversion factor was provided by the United States Centers for Medicare and Medicaid Services (CMS). This was used to obtain total reimbursement and reimbursement per minute estimates. When assessing the ratio of RVUs per minute of operative time across the groups, we found that the second stage of a 2-stage septic revision had a significantly lower RVU per minute operative time ratio (0.25) when compared to both the aseptic 2-component revision (0.34) and the first stage of a 2-stage septic revision (0.29). This translated to a significantly lower dollar per minute operative time value. The current study found that the second stage of a 2-stage septic revision was undervalued in the number of RVUs per minute of operative time when compared to an aseptic revision or even its first stage counterpart. An adjustment or redistribution of relative value units for these procedures may offset the disproportionate clinical burdens encountered with definitive treatment of these complications. Level III.