Mode of delivery and perineal injury following primary obstetric anal sphincter injury
Citation: BJOG: An International Journal of Obstetrics and Gynaecology, April 2014, vol./is.
121/(228), 1470-0328 (April 2014)
Author(s): Nausheen S.; Roberts A.J.; Wakefield N.; Canavan L.; Dinardo L.
Abstract: Introduction Obstetric anal sphincter injury (OASI) complicates 1% of vaginal deliveries. It is believed that 60-80% of women are asymptomatic following OASI repair at 12 months but studies have shown that 17-24% developed worsening of faecal symptoms after a second vaginal delivery. The risk of recurrent OASI is believed to be 5-7 fold higher in women with a previous OASI, however the true recurrence is not exactly known due to various confounding factors. Methods We conducted a retrospective review of deliveries in two maternity units in the Mersey Deanery (UK), between 2007 and 2012 (29 706 deliveries). We identified 176 women who had sustained an OASI in a previous pregnancy who went on to have a subsequent delivery, (188 subsequent deliveries).The primary outcomes studied were mode of delivery and perineal injury sustained in the subsequent delivery.