Test Code METAFR Metanephrines, Fractionated, 24-hour Urine

Important Note

First-line test in suspected pheochromocytoma

If possible, abstain from medications for 72 hours prior to collection

Additional Codes

2007996

Methodology

High Performance Liquid Chromatography-Tandem Mass Spectrometry

Specimen Type

Urine

Preferred Collection Container

24 Hr. Urine Container or Random Urine, no preservative required

Collection Volume

4 mL aliquot of well mixed 24 hour collection or random specimen

Minimum Collection Volume

2.5 mL

Collection Instructions

For 24 hour collecitons instruct the patient to void at 8:00 AM and discard the specimen. Then collect all urine including the final specimen voided at the end of the 24-hour collection period, i.e., 8:00 AM the next morning. Refrigerate during collection. Screw the lid on securely. Specimens should be transported promptly to the Clinical Laboratory. Container must be labelled with patient's full name, room number, date and time collection started, and date end time collection finished.

Transport

Refrigerated

Rejection Criteria

Specimens preserved with boric acid or acetic acid

Specimen Storage and Stability

Ambient: Unacceptable; Refrigerated: 2 weeks (unpreserved), 1 month (preserved); Frozen: 1 month

Turn Around Time

2-6 days

Lab Department

Referred Testing

CPT Coding

83835

EPIC Code

LAB7112

Acceptable Collection Container