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Amino Acids Quantitative by LC-MS/MS, Urine

Mnemonic

U AAQNT

Specimen Collection Requirements

Patient Preparation

First morning urine is preferred.

Collect

Urine, aliquot from a well-mixed random urine sample. AVOID DILUTE URINE WHEN POSSIBLE.

Handling

Clinical information is needed for appropriate interpretation. Additional required information includes age, gender, diet (e.g., TPN therapy), drug therapy and family history. CRITICAL FROZEN. As soon as possible after urine has been obtained, mix the collection well and freeze. Separate specimens must be submitted when multiple tests are ordered.

Preferred Volume

4.0 mL

Minimum Volume

3.0 mL

Transport

Frozen specimen submitted in an ARUP Standard Transport Tube

Stability

Ambient: Unacceptable; Refrigerated: 24 hours; Frozen: 1 month

Testing Information

Performed

Mon - Fri

Reported

4-9 days

Method

Quantitative Liquid Chromatography/Tandem Mass Spectrometry

Referral Lab

ARUP (2009419)

Reference Values

Reference Values

Interpretation provided.

CPT Codes

82139

Last Updated: Monday, September 23, 2019 10:53:05 PM


Client Services: 503-413-1234