Prevalence of anal sphincter injury in primiparous women

Abstract

Objective To determine the prevalence of obstetric anal sphincter injuries (OASIS)

Anal sphincter defects and fecal incontinence 15–24 years after first delivery: a cross‐sectional study

“…Despite the biases, mentioned above, against VD, we found a higher prevalence of sphincter defects after FD, which is consistent with previous findings both in observational studies and in a randomized trial. We argue that this is caused by the device itself, and not the indication or level of training of the doctor.…”

“…The prevalence of sphincter defects was lower than in some previous studies. The proportion detected on ultrasound depends on the definition of minimum size and length of discontinuity of the anal sphincters, and could explain different results in studies in which a standardized definition was not used.…”

“…The prevalence of OASIS reported at the time of delivery is likely to be an underestimate of the true proportion because of occult tears and missed diagnoses. Endoanal ultrasound is currently regarded as the gold standard for evaluation of the anal sphincter.…”

Rectal Cancer and Anal Sphincter Disorders

“…At 5 months postpartum, the prevalence of obstetric anal sphincter injuries in a cohort of primiparous women was 28 % [88]. The defects in the internal and external anal sphincter have different appearances on EUS.…”

Alteration of anal sphincter function in patients with levator avulsion: observational study

“…However, previously published studies report that up to 35 % of occult sphincter injuries detectable by ultrasound are either underdiagnosed in the delivery room or occur in patients with an intact perineum [3,4].…”