Perioperative Antibiotic Use and Associated Infectious Outcomes at the Time of Myomectomy.

OBJECTIVE: To report the frequency of perioperative antibiotic use at time of myomectomy and associated risk of infectious outcomes. METHODS: We conducted a retrospective cohort study including all women who underwent any route of myomectomy from 2009 to 2016 at two academic hospitals in Boston, Massachusetts. Cases involving chromopertubation or conversion to hysterectomy were excluded from further analysis. Medical records were queried for the use or nonuse of perioperative antibiotics, as well as baseline patient factors and perioperative outcomes. Statistical analyses included univariate comparisons between treatment groups, as well as multivariable logistic regression analyses of infectious morbidity controlling for patient age, route of surgery, presence of high-risk factors, any intraoperative complication, myoma weight, and entrance into the endometrial cavity. Matched cohort analysis also was performed to confirm findings in the setting of underlying differences between groups. RESULTS: A total of 1,211 patients were included in the myomectomy cohort, 92.7% of whom received perioperative antibiotics at the time of surgery. Demographic characteristics were similar between the group that received and the group that did not receive antibiotics. The cases with antibiotic use were associated with longer operative times, higher estimated blood loss, and greater myoma burden. No difference was noted with regard to intraoperative or postoperative complications. Surgical site infection occurred more commonly in the group that did not receive antibiotics (2.9% vs 6.8% in the antibiotic and no-antibiotic groups, respectively; effect size 0.43, 95% CI 0.18-0.97 P=.04), representing a nearly fourfold increase in odds of any surgical site infection in the absence of perioperative antibiotic use (adjusted odds ratio 3.77, 95% CI 1.30-10.97, P=.015). CONCLUSION: A high frequency of antibiotic use was noted at time of myomectomy, despite lack of clear evidence supporting the practice. Patients who received perioperative antibiotics had fewer postoperative infectious outcomes and, in particular, experienced a lower incidence of surgical site infection.

Perioperative Outcomes of Myomectomy for Extreme Myoma Burden: Comparison of Surgical Approaches.

STUDY OBJECTIVE: To describe the perioperative outcomes of various modes of myomectomy (abdominal [AM], laparoscopic [LM], or robotic [RM]) in cases of extreme myoma burden. DESIGN: Retrospective cohort study (Canadian Task Force classification II-2). SETTING: A tertiary academic center in Boston, Massachusetts. PATIENTS: All women who underwent an AM, LM, or RM for extreme myoma burden, defined as representing the upper quartile for specimen weight (≥434.6 g) or myoma count (≥7 myomas), between 2009 and 2016. INTERVENTIONS: Baseline demographics and perioperative outcomes were collected from review of medical records, including estimated blood loss, operative time, length of stay, and complications. Univariate linear and logistic regression analyses were conducted. MEASUREMENTS AND MAIN RESULTS: During the study period 659 women underwent myomectomy for extreme myoma burden; 47.2% of cases were AM, 28.1% LM, and 24.7% RM. Overall myoma burden differed across the 3 routes and was greatest in the AM group (mean weight: 696.2 ± 784.5 g for AM vs 586.6 ± 426.1 g for LM and 586.6 ± 426.1 g for RM; mean number: 16.8 ± 15.0 for AM vs 7.2 ± 7.0 for LM and 6.7 ± 4.7 for RM; p <.001 for both). The 3 routes differed in operative time and length of stay, with RM having the longest operative time (mean, 239.7 minutes; p <.001) and AM the longest length of stay (mean, 2.2 ± .9 days; p <.001). Other perioperative outcomes were similar across the surgical approaches. Increasing myoma burden was associated with an increased risk of perioperative complications for all surgical approaches, with a threshold of 13 myomas associated with an almost 2-fold higher risk of perioperative complications (odds ratio, 1.77; 95% confidence interval, 1.17-2.70; p = .009). Cumulative incidence of perioperative complications with increasing specimen weight was greater in the RM cases as compared with AM (p = .002) or LM (p = .020), whereas the cumulative incidence of perioperative complications with increasing myoma count was lowest with AM compared with LM (p <.001) or RM (p <.001). CONCLUSION: Myomectomy for extreme myomas is feasible using an abdominal, laparoscopic, or robotic approach. Increased myoma burden is associated with an increased risk of perioperative complications. A threshold of 13 myomas was associated with an almost 2-fold higher risk of perioperative complications for all modes. Perioperative complication outcomes were more favorable in AM or LM over RM with increased myoma weight and AM over LM or RM with increased myoma number.