Inclusion of turnover time does not influence identification of surgical services that over- and underutilize allocated block time

Amr E. Abouleish, Sharon L. Hensley, Mark Zornow, Donald S. Prough

Research output: Contribution to journalArticle

30 Scopus citations


Allocation of operating room (OR) block time is an ongoing challenge for OR managers. In this study, we sought to determine whether inclusion or exclusion of turnover time in comparisons of block utilization would identify different surgical services as under- or overused. For a 13-mo period, we evaluated data extracted from the OR information system of a large academic medical center. During that time period, 15 surgical services performed 12,245 surgical procedures. Allocated block hours, number of first cases performed, total number of cases, and average case durations were determined. The average turnover time for each service was determined by a manual, case-by-case review of data from 1 mo. Raw utilization (RU; case durations only) and adjusted utilization (AU; case duration plus turnover time) were calculated for each service. Turnover time was credited to the service performing surgery after room turnover. Case du-ration was limited to surgeries performed during resource hours. Two indices of utilization (i.e., the usage rate of the service divided by the overall use of all ORs in the suite) were used to compare services: the RU or AU Index (RUI or AUI). Outliers were services with indices that were >1.15 or 2 = 0.60); the average turnover time did not (r2 = 0.002). Inclusion of turnover time did not change the services that were identified as under- and overutilizer.

Original languageEnglish (US)
Pages (from-to)813-818
Number of pages6
JournalAnesthesia and Analgesia
Issue number3
Publication statusPublished - Mar 1 2003
Externally publishedYes


ASJC Scopus subject areas

  • Anesthesiology and Pain Medicine

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