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METANEPHRINES FRACTIONATED, URINE

Mnemonic

U METAFR

Specimen Collection Requirements

Patient Preparation

Abstain from medications for 72 hours prior to collection.

Collect

Urine, 24-hour or random collection container

Handling

Adequate refrigeration is the most important aspect of specimen preservation. Stability can be enhanced by adjusting the pH to 2-4 by using an acid such as 6 mol/L HCl. A pH lower than 2 may cause assay interference. Aliquot from a well mixed 24-hour or random urine collection. Record the total volume and collection time interval on the transport tube and the test request form.

Preferred Volume

5.0 mL

Minimum Volume

2.5 mL

Transport

Refrigerated

Rejection Criteria

Room temperature specimens, specimens preserved with boric acid or acetic acid

Stability

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

Testing Information

Performed

7 days/week

Reported

2-5 days

Method

Quantitative High Performance Liquid Chromatography-Tandem Mass Spectrometry

Referral Lab

ARUP (2007996)

Reference Values

Reference Values

Interpretation provided.

CPT Codes

83835

Last Updated: Thursday, January 5, 2017 03:41:24 AM


Client Services: 503-413-1234