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Surgical volume and conversion rate in laparoscopic hysterectomy: does volume matter? A multicenter retrospective
José H M Keurentjes1, Justine M Briët2, Geertruida H de Bock3
1Department of Gynaecologic Oncology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands. j.h.m.keurentjes@umcg.nl.
Background:
A multicenter, retrospective, cohort study was conducted in the Netherlands. The aim was to evaluate whether surgical volume of laparoscopic hysterectomies (LHs) performed by proven skilled gynecologists had an impact on the conversion rate from laparoscopy to laparotomy.
Methods:
In 14 hospitals, all LHs performed by 19 proven skilled gynecologists between 2007 and 2010 were included in the analysis. Surgical volume, conversion rate and type of conversion (reactive or strategic) were retrospectively assessed. To estimate the impact of surgical volume on the conversion rate, logistic regressions were performed. These regressions were adjusted for patient's age, Body Mass Index (BMI), ASA classification, previous abdominal surgery and the indication (malignant versus benign) for the LH.
Results:
During the study period, 19 proven skilled gynecologists performed a total of 1051 LHs. Forty percent of the gynecologists performed over 20 LHs per year (median 17.3, range 5.4-49.5). Conversion to laparotomy occurred in 5.0% of all LHs (53 of 1051); 38 (3.6%) were strategic and 15 (1.4%) were reactive conversions. Performing over 20 LHs per year was significantly associated with a lower overall conversion rate (ORadjusted 0.43, 95% CI 0.24-0.77), a lower strategic conversion rate (ORadjusted 0.32, 95% CI 0.16-0.65), but not with a lower reactive conversion rate (ORadjusted 0.96, 95% CI 0.33-2.79).
Conclusion:
A higher annual surgical volume of LHs by proven skilled gynecologists is inversely related to the conversion rate to laparotomy, and results in a lower strategic conversion rate.
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