Early or delayed? Timing of surgical reintervention in obstetric anal sphincter injuries: a systematic review

This study aims to compare the outcomes of early and delayed surgical reintervention (secondary repair) for obstetric anal sphincter injuries (OASIS), focusing on surgical outcomes and quality of life, and to determine the optimal timing for reintervention. Articles were searched from four databases using formulated keywords. The selection process was conducted by applying predetermined inclusion and exclusion criteria. Data extraction focused on the outcomes and quality of life that were observed following the timing of repair. A total of 9 studies met the inclusion criteria, with sample sizes ranging from 50 to 500 participants, comparing early surgical intervention (within 14 days) with delayed intervention (3-4 months after primary repair) for OASIS repair. Early reintervention demonstrated significantly better outcomes, with a primary healing rate of 85% compared to 70% in delayed cases, and lower complication rates (15% vs. 25%), including fewer instances of infection, pain, and reoperation needs. Continence outcomes improved in both groups, but early intervention showed a slight advantage, with 90% of patients reporting better continence compared to 75% in the delayed group. Additionally, patient satisfaction was notably higher in the early intervention group, with reports of quicker recovery and enhanced quality of life post-repair. Early intervention generally yields superior outcomes with better healing, fewer complications, and improved continence, while delayed repair may still be beneficial in selected cases due to enhanced tissue revascularization after a healing period. Ultimately, surgical timing should be guided by objective measures such as the Wexner score to individualize management and optimize quality of life.