Does episiotomy at vacuum delivery increase maternal morbidity?

Episiotomy at the time of vacuum delivery does not appear to be of benefit, and it more likely than not increases maternal morbidity. This is especially true of median episiotomy (the type used most commonly in the United States), which increases the risk of OASIS at the time of vacuum delivery 5-fold in nulliparous and 89-fold in multiparous women.

Confidence in these conclusions is guarded. Based on the small number of reports, the lack of randomized trials, and the significant heterogeneity between the studies, the authors rated the overall quality of evidence as “low” to “very low” using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) working group criteria. Additional large prospective clinical trials are needed to definitively answer the question of whether episiotomy at vacuum delivery increases maternal morbidity.

Until such studies are available, however, it would be best if obstetric care providers avoid episiotomy at the time of vacuum delivery. On a personal note, I look forward to the day when a medical student turns to an attending and asks: “What is an episiotomy?” And the attending responds: “I don’t know. I’ve never seen one.” Only then will I be ready to retire. 

Sagi-Dain L, Sagi S. Morbidity associated with episi- otomy in vacuum delivery: a systematic review and meta- analysis. BJOG. 2015;122(8):1073-1081.