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Trypsin and chymotrypsin in stool


Definition:

Trypsin and chymotrypsin are substances released from the pancreas during normal digestion. When the pancreas does not produce enough trypsin and chymotrypsin, smaller-than-normal amounts can be seen in a stool sample.

This article discusses the test to measure trypsin and chymotrypsin in stool.

Alternative Names:

Stool - trypsin and chymotrypsin

How the Test is Performed:

There are many ways to collect the samples. Your health care provider will tell you how to collect the stool.

You can catch the stool on plastic wrap that is loosely placed over the toilet bowl and held in place by the toilet seat. Then put the sample in a clean container. One type of test kit contains a special tissue that you use to collect the sample. Then you put the sample in a clean container.

To collect a sample from infants and young children:

  • If the child wears a diaper, line the diaper with plastic wrap.
  • Place the plastic wrap so that urine and stool do not mix.

A drop of stool is placed on a thin layer of gelatin. If trypsin or chymotrypsin are present, the gelatin will clear.

How to Prepare for the Test:

Your health care provider will provide you with the supplies needed to collect the stool.

Why the Test is Performed:

These tests are simple ways of finding out whether you have a decrease in pancreas function. This is most often due to chronic pancreatitis.

These tests are most often done in young children who are thought to have cystic fibrosis.

Note: This test is used as a screening tool for cystic fibrosis but it does not diagnose cystic fibrosis. Other tests are needed to confirm a diagnosis of cystic fibrosis.

Normal Results:

The result is normal if there is a normal amount of trypsin or chymotrypsin in the stool.

What Abnormal Results Mean:

An abnormal result means the trypsin or chymotrypsin levels in your stool are below the normal range. This may mean that your pancreas is not working properly. Other tests may be done to confirm that there is a problem with your pancreas.

References:

Forsmark C. Chronic pancreatitis. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisinger and Fordtran's Gastrointestinal and Liver Disease. 9th ed. Philadelphia, Pa: Saunders Elsevier; 2010:chap 59.


Review Date: 1/22/2013
Reviewed By: George F. Longstreth, MD, Department of Gastroenterology, Kaiser Permanente Medical Care Program, San Diego, California. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, Bethanne Black, Stephanie Slon, and Nissi Wang.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. Copyright 2002 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

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