Purpose
To better understand how perioperative care impacts charges for carpal tunnel release (CTR).
Methods
We developed a cohort using ICD9-DM procedure code 04.43 for CTR in the National Survey of Ambulatory Surgery 2006 to test perioperative factors potentially associated with CTR costs. We examined factors that might impact costs including: patient characteristics, payor, surgical time, setting (hospital outpatient department “HOPD” vs. freestanding ambulatory surgery center “ASC”), anesthesia type, anesthesia provider, discharge status, and adverse events. Records were grouped by facility to reduce the impact of surgeon and patient heterogeneity. Facilities were divided into quintiles based on average total facility charges per CTR. This division allowed comparison of factors associated with the lowest and highest quintile of facilities based on average charge per CTR.
Results
160,000 CTRs were performed in 2006. Nearly all patients were discharged home without adverse events. Mean charge across facilities was $2572 (SD $2331 to $2813). Patient complexity and intra-operative duration of surgery was similar across quintiles (approximately 13 minutes). Anesthesia techniques were not significantly associated with patient complexity, charges, and total perioperative time. HOPD setting was strongly associated with total charges, with $500 higher charge per CTR. Half of all CTRs were performed in HOPDs. Facilities in the lowest quintile charge group were ASCs.
Conclusions
Examination of charges for CTR suggests that surgical setting is a large cost driver with the potential opportunity to lower charges for CTRs by approximately 30% if performed in ASCs.
Type of Study
Economic and Decision Analysis
Level of Evidence
Level II Retrospective Study