Skip to main content
padlock icon - secure page this page is secure

Anal canal pressures are low in women with postpartum anal fissure

The full text article is not available for purchase.

The publisher only permits individual articles to be downloaded by subscribers.

Background Anal sphincter hypertonia is commonly thought to underlie development of anal fissure, yet anal fissure is particularly common after childbirth, a time when anal canal pressure may be reduced. This paradox was investigated by a prospective study of the effect of parturition on the pelvic floor.

Methods Anal manometry was performed 6 weeks before and after delivery in 209 primigravid women with no pre-existing history of anorectal disease. Postpartum studies only were performed on a further 104 primiparae. Anal fissure was diagnosed by history and direct examination.

Results Some 29 women (9 per cent) developed postpartum anal fissure. Antepartum anal canal resting and squeeze pressures were similar in women who did and those who did not develop fissure. Resting and squeeze anal canal pressures decreased post partum in both groups. Postpartum constipation was more common in those with fissure (62 per cent) than in those without (29 per cent) (chi2=10·6, 1 d.f., P<0·01). The mode of delivery or use of epidural analgesia did not affect the incidence of fissure.

Conclusion Postpartum anal fissure is associated with reduced anal canal pressures, and surgical interference with the anal sphincter mechanism should be avoided.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Document Type: Research Article

Affiliations: Department of Surgery, Mater Misericordiae Hospital, Department of Obstetrics, University College Dublin and National Maternity Hospital, Dublin, Ireland

Publication date: January 1, 1997

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more