Risk factors of lower urinary tract injury with laparoscopic sacrocolpopexy

Lower urinary tract injuries can occur during pelvic reconstructive surgery, including sacrocolpopexy. The reported injury rates range from 0.4% to 10.6% with laparoscopic sacrocolpopexy, 1.1% to 3.3% with abdominal sacrocolpopexy, and 2.3% to 10% with robotic sacrocolpopexy. Specific literature identifying the risk factors for lower urinary tract injury during pelvic reconstructive surgery is lacking; therefore; we aim to identify the patient characteristics predisposing a patient to lower urinary tract injury during laparoscopic sacrocolpopexy.

The primary objective of this study was to identify the patient-specific risk factors for lower urinary tract injury with laparoscopic sacrocolpopexy.

This was an age-matched, case-control study including patients who underwent laparoscopic sacrocolpopexy from July 2014 to December 2017 in a high-volume female pelvic medicine and reconstructive surgery practice. The patients were excluded if they underwent laparoscopic uterosacral ligament suspension, had abnormal urinary tract anatomy, or for incorrect, incomplete, or duplicated data. Risk factors such as race, body mass index, pelvic organ prolapse quantification stage, previous abdominal and/or vaginal surgeries, and concurrent procedures (lysis of adhesions, adnexal surgery, midurethral sling placement, and anterior or posterior colporrhaphy) were analyzed. Groups were compared using the Student t-test for independent samples and chi-square tests. Conditional logistic regression was used to estimate the crude and adjusted odds ratios.

A total of 930 patients were identified during electronic medical record chart review using the current procedural terminology code 57425 (laparoscopic colpopexy). A total of 167 patients met the exclusion criteria, resulting in a total of 763 patients for primary analysis. The prevalence of lower urinary tract injury was 2.4% (17 bladder injuries and 1 ureteral injury out of 763 laparoscopic sacrocolpopexy procedures). These 18 cases were age-matched to 72 controls. The mean age and body mass index of all patients was 64.8 years (±9.32) and 26.5 kg/m² (±3.99), respectively. Most of the patients were Caucasian, had previously undergone abdominal and/or vaginal surgery, had pelvic organ prolapse stage 3 or greater, and underwent concurrent surgeries, including adnexal surgery and midurethral sling placement at the time of laparoscopic sacrocolpopexy. A history of previous hysterectomy (odds ratio, 19.94; 95% confidence interval, 2.48-160.38; P=.005) and lysis of adhesions at the time of laparoscopic sacrocolpopexy (odds ratio, 4.94; 95% confidence interval, 1.05-23.19; P=.043) were associated with an increased odds of lower urinary tract injury in unadjusted models. In a multivariable logistic regression model controlling for the previously listed variables, a history of previous hysterectomy remained significantly associated with lower urinary tract injury (adjusted odds ratio, 162.41; 95% confidence interval, 3.21-8227; P=.011). Race, body mass index, pelvic organ prolapse quantification system stage, previous abdominal and/or vaginal surgery, and concurrent procedures were not associated with an increased risk of lower urinary tract injury.

Although lower urinary tract injury with laparoscopic sacrocolpopexy only occurred in 2.4% of patients, previous hysterectomy increased this risk substantially. As sacrocolpopexy is the common treatment for prolapse after hysterectomy or recurrent prolapse, this increased risk of lower urinary tract injuries can guide surgical counseling on the basis of patient-specific risk factors and aid in setting appropriate postoperative patient expectations.