Association between body mass index and pain following transobturator sling

We aimed to prospectively evaluate the association between body mass index (BMI) and development of postoperative-onset pain in women undergoing transobturator midurethral sling procedures. We conducted a prospective, observational cohort study of women undergoing inside-to-out transobturator midurethral sling. At preoperative visit, height, weight, self-reported activity level and baseline pain were documented. At postoperative visits, patients indicated pain location and severity, procedure success, and satisfaction. We used log binomial regression to calculate risk ratios, controlling for potential confounders. For the 129 women included, median age was 50.0 years and BMI was 27.2 kg/m2. Adjusting for age and activity level, overweight and obese women had significantly increased risk of postoperative-onset pain compared to normal BMI women. Overweight women were at 1.70 (95%CI 1.05–2.75) times the risk compared to leaner counterparts, whereas obese women were at 1.76 times the risk (95%CI 1.04–2.89). Neither success nor satisfaction was associated with BMI.Impact statement Over three million midurethral slings have been placed worldwide for the treatment or prevention of stress urinary incontinence. The procedure has been studied in lean, overweight and obese populations, and found to have similar efficacy regardless of BMI. Similarly, the risks of midurethral sling have been well-documented, including the risk of pain after transobturator sling. Little attention has been given to whether this risk of postoperative pain varies based on patient BMI. Our previous work suggesting that leaner patients might be at increased risk of postoperative pain following transobturator sling was limited by the shortcomings of a retrospective study design. In this prospective study, we were able to adjust for age and activity level, finding that higher BMI women were at increased risk of postoperative pain, while reporting similar levels of satisfaction with the procedure. Future research is needed to find what differences in anatomy or physiology can explain this finding. From a clinical standpoint, thorough counselling of all patients but particularly those with elevated BMI, is required so that appropriate expectations regarding recovery can be set preoperatively

Effect of Scopolamine Patch Use on Postoperative Voiding Function After Transobturator Slings.

OBJECTIVES: The aim of this study was to determine whether the use of a preoperative transdermal scopolamine (TDS) patch for postoperative nausea and vomiting prophylaxis affects the success of a voiding trial after a transobturator tape sling procedure. METHODS: This study is a retrospective cohort study of adult women who underwent a transobturator tape sling procedure without concomitant procedures from February 1, 2009 through August 1, 2010. The exposed group included all eligible women who received a preoperative TDS patch. For each exposed woman, we selected the next 2 consecutive eligible women who did not receive a TDS patch to be included in the unexposed group. The primary outcome was postoperative voiding trial failure. RESULTS: We identified 35 women who met eligibility criteria and used a preoperative TDS patch, and included 70 women who did not use a preoperative TDS. A significantly higher proportion of women in the TDS patch group (54.3%) failed their voiding trial than in the group that did not receive TDS (7.1%, P ≤ 0.001). A history of an incontinence procedure, older age, and higher body mass index strengthened the association between TDS patch and voiding trial failure. The adjusted model yielded a risk ratio for voiding trial failure of 13.8 (95% confidence interval, 5.2-36.5) for women who received TDS patch compared with those who did not. CONCLUSIONS: The results of this study demonstrate that use of TDS patches for postoperative nausea and vomiting prophylaxis may negatively affect the success of voiding trials after transobturator tape sling procedures