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Porphyrins, Stool

Porphyrins, 24-Hour, Feces

Test Codes

EPIC: LAB6132, Beaker: XPORF, Mayo: FQPPS

Department

Send Outs

Instructions

• Specimen collection containers can be obtained from Beaumont Laboratory at 1-800-551-0488.
• Patient should be instructed to refrain from red meat and aspirin-containing medications for 3 days prior to, as well as during, specimen collection.
• No barium, laxatives, or enemas may be used within 24 hours of starting the collection.

Specimen Collection Criteria

Collect (preferred specimen): 48-hour, 72-hour, or 96-hour stool specimen in the appropriate containers obtained from the Laboratory.
Also acceptable: 24-hour stool specimen in the appropriate containers obtained from the Laboratory, if the collection volume is approximately 100 grams. If a 24-hour collection does not weigh 100 grams, continue collection until 100 grams are obtained.

• Specimen must be refrigerated or frozen during and after collection.
• Note the length of collection on the specimen.

Physician Office/Draw Specimen Preparation

Note the length of collection on the specimen. Freeze (-20°C/-4°F or below) the entire specimen prior to transport.

Preparation for Courier Transport

Transport: Entire stool collection, frozen (-20°C/-4°F or below). (Minimum: 10 g)

Rejection Criteria

• Specimens less than 10 grams.
• Specimens not collected and processed as indicated.

In-Lab Processing

Note the length of collection on the specimen. Freeze (-20°C/-4°F or below) the entire specimen prior to transport.

Transport: Entire stool collection, frozen (-20°C/-4°F or below). (Minimum: 10 g)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): Unacceptable
Refrigerated (2-8°C or 36-46°F): 14 days
Frozen (-20°C/-4°F or below): 14 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions. 

Laboratory

Sent to Mayo Medical Laboratories, Rochester, MN.

Performed

Tuesday, Thursday.
Results available in 5-6 days.

Reference Range

By report.

Test Methodology

High Pressure Liquid Chromatography (HPLC). Porphyrins are quantitated by fluorescence.

Interpretation

By report.

CPT Codes

84126

Contacts

Last Updated

10/8/2023