The Effect of Partial Bladder Filling on Post-Operative Time to Void in Minimally Invasive Gynecologic Procedures [13D

Abstract

INTRODUCTION: In urogynecologic procedures, backfilling the bladder with 300 cc has been shown to be a better predictor of successful post-operative bladder emptying than completely emptying the bladder at the end of surgery (1). The participants of this study were those undergoing GYN continence procedures, meaning they had some baseline urinary dysfunction. Our study attempts to see the effect on time to void in patients undergoing minimally invasive GYN procedures (laparoscopic or robotic hysterectomy or myomectomy) without baseline urinary dysfunction. The experimental group will have the bladder partially filled at 150cc and the control group will have the bladder completely emptied at the end of the procedure. METHODS: This is a double-blind randomized controlled trial. Sample calculations based on total time required to void after Foley catheter removal assuming an alpha level of 0.05 and beta of 0.8 indicate that 36 patients are needed in each group to determine a difference of 20 minutes in voiding time. Up to 38 patients will be enrolled to take into account a 5% dropout rate. Recruitment started on March 20,2016 with 32 patients recruited thus far. RESULTS: Preliminary comparisons between time to void in PACU and total PACU stay time between partially filled and empty bladder are as follows: 78-minute decrease in time needed to void in the PACU and 74-minute decrease in PACU stay time, respectively. CONCLUSION: This trial has potential to prove our hypothesis that partial bladder back-filling decreases time to void after minimally invasive benign gynecologic procedures, decreasing PACU length of stay and cost.