Mandatory Preoperative Metronidazole Linked to Sharp Reduction in Hysterectomy SSIs: Study
Hysterectomy
USA: A Gulf Coast hospital has reported an 87% reduction in surgical site infections (SSIs) following hysterectomy procedures after introducing mandatory preoperative metronidazole as part of its infection-prevention protocol.
The findings, published in the Journal of Infection Prevention, highlight the potential benefits of standardized antibiotic prophylaxis in reducing postoperative complications. Experts noted that the results demonstrate the significant impact that consistent, evidence-based preventive care measures can have on improving surgical outcomes and patient safety.
The findings were reported by Ushma J. Patel from the Department of Obstetrics & Gynecology, University of Wisconsin, Madison, USA, and colleagues in a study evaluating the effectiveness of a comprehensive hysterectomy surgical site infection prevention bundle.
Surgical site infections remain among the most common postoperative complications and can lead to prolonged hospital stays, increased healthcare costs, hospital readmissions, and poorer patient outcomes. After the Centers for Disease Control and Prevention’s National Healthcare Safety Network (NHSN) identified elevated standardized infection ratios (SIRs) for hysterectomy procedures at a large community hospital, a multidisciplinary team developed a targeted quality-improvement initiative aimed at reducing infection rates.
In 2020, the hospital introduced a Hysterectomy SSI Prevention Bundle designed to standardize perioperative care practices. The bundle incorporated evidence-based measures to improve infection prevention and ensure consistent implementation across surgical teams.
To assess the impact of the intervention, researchers compared outcomes from 857 benign hysterectomy procedures performed before bundle implementation with 772 procedures conducted after implementation. The analysis included abdominal, laparoscopic, and vaginal hysterectomies performed in both inpatient and outpatient settings.
Key Findings:
- Implementation of the SSI prevention bundle reduced hysterectomy-related standardized infection ratios (SIRs) to below 1.0, indicating better-than-expected infection outcomes.
- Significant reductions in infection ratios were observed following bundle implementation.
- Outpatient abdominal hysterectomies showed a significant decline in infection rates.
- Infection ratios for inpatient vaginal hysterectomies fell to zero.
- Complex inpatient abdominal hysterectomies experienced significant reductions in infection rates.
- Complex inpatient vaginal hysterectomies also showed marked declines in infection rates.
- The proportion of laparoscopic hysterectomies increased after bundle implementation.
- The proportion of vaginal hysterectomies decreased during the study period.
- More hysterectomies were performed on an outpatient basis after implementation of the bundle.
- Procedure durations were longer following implementation.
- Favorable infection outcomes were maintained despite changes in surgical practices and procedure characteristics.
The researchers emphasized that reducing postoperative infections can provide substantial clinical and economic benefits. Lower infection rates are associated with decreased morbidity and mortality, shorter hospital stays, fewer readmissions, lower healthcare expenditures, and improved patient experiences.
A key limitation, as noted by the authors, was that all bundle components were implemented simultaneously, preventing assessment of individual interventions. Other limitations included potential unmeasured infection risk factors in the NHSN database and the grouping of different hysterectomy approaches under NHSN reporting criteria.
Despite these limitations, the investigators concluded that implementation of a standardized, evidence-based SSI prevention bundle successfully reduced and sustained hysterectomy infection rates below expected levels. They emphasized that ongoing review of emerging evidence and continuous monitoring of compliance are essential to maintaining these gains and further improving surgical safety.
Reference:
Patel, U. J., Al-Niaimi, A. A., Parrette, K. M., Zerbel, S. A., Barman, S. M., Gill, T., & Heisler, C. A. (2024). Aiming for zero: Success of the hysterectomy surgical site infection prevention bundle. Journal of Infection Prevention. https://doi.org/10.1177_17571774241266448
