pH, Fecal

Casandra

Casandra Test Code AR38769Version 1 (DRAFT)

Performing Lab

Lab ARUP LaboratoriesLab Test ID 0020518CPT Code 83986

Also known as: FEC-PH

Clinical Use

Order Test

Use

The fecal pH test is used to measure the acidity or alkalinity of stool. It is a useful diagnostic tool in identifying digestive disorders, including lactose intolerance, short bowel syndrome, and infections caused by certain bacteria. Abnormal pH levels in the stool can indicate malabsorption syndromes or other gastrointestinal disorders affecting the normal absorption and digestion process.

Special Instructions

The sample should be collected in an unpreserved stool transport vial obtained from ARUP Supply and frozen immediately to maintain stability. This ensures accurate measurement of the stool's pH by preventing any changes due to bacterial action or environmental exposure. For proper ordering, ensure the specimen meets the specified volume and preparation conditions before submission.

Limitations

This test measures the pH of stool but does not diagnose specific diseases. Variations in stool pH may occur due to factors such as diet, medications, and the presence of bacteria or viruses, leading to potential false readings. Grossly bloody specimens or those containing certain substances like barium could lead to inaccurate results. Tests performed on specimens not handled as specified may show altered pH levels due to external factors affecting the stool's chemical environment.

Test Details

New York Approved