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#23240

ANAL ENDOSONOGRAPHIC ASSESSMENT OF THE ACCURACY OF CLINICAL DIAGNOSIS OF OBSTETRIC ANAL SPHINCTER INJURY (OASIS) AND CORRELATION WITH ANAL FUNCTION AND BOWEL SYMPTOMS Jones A1, Ferrari L2, Igualada-Martinez P2, Oteng-Ntim E2, Hainsworth A2, Schizas A2 1. GKT School of Medical Education, King's College London, 2. Guy’s and St Thomas’ NHS Foundation Trust KEYWORDS: Anal Incontinence, Pelvic Floor, Female, Urgency, Fecal, Imaging Obstetric Anal Sphincter Injuries (OASIS) are a common cause of maternal morbidity with an overall incidence in the UK of 2.9% (range 0-8%) (1). Women who have obstetric anal sphincter injuries diagnosed at the time of delivery undergo primary repair. However, a residual defect persists in many cases after this repair. This can contribute to a range of physical symptoms and psychological distress. Bowel symptoms caused by OASIS can include faecal urgency, faecal incontinence, post defecation soiling or flatus incontinence (2). The aim of this study is to access the accuracy of clinical diagnosis of obstetric anal sphincter injuries using Anal Endosonography (EUAS), and the correlation between confirmed injury and change to anorectal physiology squeeze pressure, as well as the incidence of bowel symptoms.