MSD Manual

Please confirm that you are a health care professional




Jonathan Gotfried

, MD, Lewis Katz School of Medicine at Temple University

Last full review/revision Jun 2019| Content last modified Jun 2019
Click here for Patient Education
NOTE: This is the Professional Version. CONSUMERS: Click here for the Consumer Version

Manometry is measurement of pressure within various parts of the gastrointestinal tract. It is done by passing a catheter containing solid-state or liquid-filled pressure transducers through the mouth or anus into the lumen of the organ to be studied. Manometry typically is done to evaluate motility disorders in patients in whom structural lesions have been ruled out by other studies. Manometry is used in the esophagus, stomach and duodenum, sphincter of Oddi, and rectum. Aside from minor discomfort, complications are very rare. Patients must have nothing by mouth (npo) after midnight.

Anorectal manometry

In this test, a pressure transducer is placed in the anus to evaluate the anorectal sphincter mechanism and rectal sensation in patients with incontinence or constipation. It can help diagnose Hirschsprung disease and defecation disorders and provide biofeedback training for fecal incontinence. A barostat balloon is also inflated during the test to evaluate rectal sensation and accommodation. The balloon expulsion test, which is often done together with anorectal manometry, allows for objective assessment of evacuation function.


This is a pressure-sensing device that is placed in the stomach to measure gastric accommodation. The device consists of a plastic balloon and an electronic controller that varies the amount of air in the balloon to maintain constant pressure. This device is used mainly in research studies assessing sensory threshold and altered visceral perception, particularly in functional gastrointestinal disorders.

Esophageal manometry

This test is used to evaluate patients with dysphagia, heartburn, regurgitation, or chest pain. It measures the pressure in the upper and lower esophageal sphincters, determines the effectiveness and coordination of propulsive movements, and detects abnormal contractions. Manometry can be used to diagnose esophageal motility disorders such as achalasia, diffuse spasm, systemic sclerosis, and lower esophageal sphincter hypotension and hypertension. It also is used to evaluate esophageal function and anatomy such as hiatus hernia before certain therapeutic procedures (eg, antireflux surgery, pneumatic dilation for achalasia). High-resolution manometry is often combined with impedance testing to simultaneously evaluate bolus transit through the esophagus during the test swallows.

Gastroduodenal manometry

In this test, transducers are placed in the gastric antrum, duodenum, and proximal jejunum. Pressure is monitored for 5 to 24 hours in both fasting and fed states. This test is usually used in patients who have symptoms suggestive of dysmotility but have normal gastric emptying study results or who are unresponsive to therapy. It can help determine whether the patient's symptoms or dysmotility result from a muscular disorder (abnormal contraction amplitude but normal pattern) or nerve disorder (irregular contraction pattern but normal amplitude).

Click here for Patient Education
NOTE: This is the Professional Version. CONSUMERS: Click here for the Consumer Version
Professionals also read

Also of Interest


View All
Overview of Lactose Intolerance
Overview of Lactose Intolerance
3D Models
View All
Ileal Pouch–Anal Anastomosis (IPAA)
3D Model
Ileal Pouch–Anal Anastomosis (IPAA)