Medical Dictionary Search Engines

Please be patient! It may take up to ONE minute to load all the Engines.
Problems? Please contact our support.


Search For


Specialty Search




Other encyclopedia topics: A-Ag Ah-Ap Aq-Az B-Bk Bl-Bz C-Cg Ch-Co Cp-Cz D-Di Dj-Dz E-Ep Eq-Ez F G H-Hf Hg-Hz I-In Io-Iz J K L-Ln Lo-Lz M-Mf Mg-Mz N O P-Pl Pm-Pz Q R S-Sh Si-Sp Sq-Sz T-Tn To-Tz U V W X Y Z 0-9   

Gastric suction

Alternative names

Gastric lavage; Stomach pumping; Nasogastric tube


Gastric suction is a procedure to empty the contents of the stomach, usually for analysis or removal of irritating elements such as poisons.

How the test is performed

A tube is inserted through the nose or mouth, down the esophagus, and into the stomach. Sometimes a topical anesthetic may be applied to minimize irritation and gagging as the tube is being placed.

Stomach contents can be removed using suction immediately or after irrigating water through the tube.

How to prepare for the test

In an emergency setting such as when a patient has swallowed poison or is vomiting blood, no preparation is needed for gastric suction. When it is done for the analysis of gastric acid, your physician may ask you to fast overnight or stop taking certain medications.

How the test will feel

You may feel a gagging sensation as the tube is passed.

Why the test is performed

This test may be performed for several different reasons, such as:
  • To remove poisons, toxic substances, or overdosed medications from the stomach
  • To irrigate and clean the stomach prior to performing an upper endoscopy (EGD) in someone who has been vomiting blood
  • To collect stomach acid contents for further analysis
  • To provide relief and decompression in someone with intestinal obstruction

What the risks are

There is a very small risk of the tube being accidentally placed into the airway instead of the esophagus.

Other small risks include the following:

  • Aspiration of gastric contents
  • Perforation of the esophagus
  • Minor bleeding

Update Date: 1/2/2003

Jenifer K. Lehrer, M.D., Department of Gastroenterology, Graduate Hospital, Philadelphia, PA. Review provided by VeriMed Healthcare Network.

©2009 [Privacy Policy] [Disclaimer]
Last updated: Tue, 06 Jan 2009 00:20:03 GMT