Utility of Preoperative Laboratory Testing in Women Undergoing Suburethral Sling.

OBJECTIVE: The aim of the study was to examine current patterns and factors associated with preoperative testing in patients undergoing midurethral sling and to compare 30-day outcomes in subjects.

METHODS: This retrospective cohort study was performed using the National Surgery Quality Improvement Program database from 2005 to 2014. All women undergoing midurethral slings were identified by Current Procedural Terminology code. Clinical variables were abstracted and the incidence of preoperative serum labs was determined. Multivariable logistic regression was used to estimate associations between clinical factors and collection of preoperative serum labs and between 30-day outcomes and collection of labs.

RESULTS: A total of 12,368 women underwent midurethral sling in the National Surgery Quality Improvement Program database during the study period. Preoperative serum testing within 30 days before surgery was observed in 9172 (74.2%) women. Age, American Society of Anesthesiologists class, diabetes, and hypertension were strongly associated with preoperative testing when modeling together in multivariable regression. Of the 543 women who had any complication, 410 (75.5%) received preoperative testing. Urinary tract infection was the most frequent complication (66.1%). Age, American Society of Anesthesiologists class, body mass index, and presence of any comorbidity were associated with the presence of any complication at 30 days. Adjusting for these factors, the odds of complications were not significantly different between those who did and did not have preoperative testing (adjusted odds ratio = 0.98, 95% confidence interval = 0.78-1.24).

CONCLUSIONS: Most women who underwent midurethral sling procedures had preoperative testing. Major postoperative complications were uncommon, and there was no substantial difference in outcomes between women who underwent preoperative testing and those who did not. In the future, surgeons may consider eliminating preoperative testing in low-risk patients.