Test Directory

Test Code
CHYM
Test Name
Chymotrypsin, Fecal
CPT Codes
84311
Expected Turnaround Time
3 days
Clinical Utility

The diagnosis of chronic pancreatitis depends upon the demonstration of functional impairment of the pancreas. Impairment is determined by several means, two of which are:

1. Direct measurement of exocrine secretion into the duodenum after stimulation by a standard meal or after stimulation by intravenous secretin/pancreozymin.

2. The direct measurement of the activities of certain enzymes in feces. Chymotrypsin activity in stool, for example, has been shown to be lower than normal in patients with pancreatic exocrine insufficiency.

Specimen and Container Info

Specimen Type: Stool

Collection Container: Sterile Container

Desired Specimen Volume: 1 g

Collection Instructions
  1. Collect random stool in sterile container or unpreserved transport vial.
Processing and Submission Instructions
  1. Transport 1g of stool in the original collection container.
Patient Preparation

Patients receiving pancreatic enzymes should discontinue taking the enzymes at least 5 days before the collection of the stool sample.

Transport Instructions

Transport to the laboratory refrigerated. 

Stability Requirements

Refrigerated

14 days

Frozen

30 days

Methodology
Quantitative Enzymatic/Spectrophotometry
Reference Intervals

See patient report.

Alternate Names
  • Chymotrypsin, Stool
Reference Lab
Quest Diagnostics Nichols Institute
Testing Schedule
Routine, 1 time per week