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Content provided by Jon Lund
Clinical Associate Professor, School of Graduate Entry Medicine & Health, University of Nottingham
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Anorectal Manometry
Contents
- Description
- Indications
- Complications
- Procedure
1. Description
Anorectal manometry is utilised to provide information on pressures that are generated in the rectum. There are two sphincters present in the anal canal - the internal and external sphincters. Anorectal manometry is able to analyse the function of one or both sphincters and provide information as to whether functional weakness is present by analysing the rectoanal inhibitory reflex, squeezing pressure, resting pressure and high pressure zone.
2. Indications
- Faecal incontinence
- Pelvic floor dyssynergia
- Constipation
- Hirschsprung's disease
3. Complications
- Latex allergy to manometry balloon
4. Procedure
- Enema is given prior to the procedure
- PR performed prior to procedure
- Manometry probe is inserted into the rectum and slowly withdrawn
- As it withdrawn the transducer is continuously measuring the pressures at different points
- The patient is then asked to squeeze the anus onto the probe, thus measuring sphincter pressure
- Finally, a balloon is inflated at the tip of the probe, and the patient is asked whether this gives the sensation of urgency to defaecate.
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