[Practical issues in the management of third and fourth degree tears to minimise the incidence of faecal incontinence].

Faecal incontinence is underestimated in most epidemiological studies, probably because women may feel unable to discuss the symptoms they experience and avoid seeking medical advice. The most common cause of faecal incontinence in healthy women is an injury during a vaginal delivery. In this article we review the classification and terminology, as well as the risk factors, for third and fourth degree perineal tears. We also comment on the different suture techniques, the follow-up of women who sustain third and fourth degree tears and the advice given to those women regarding future pregnancies and mode of delivery. We highlight the importance of the endoanal ultrasound on the diagnosis of occult anal sphincter injury.