Random Urine

Yellow top conical tube (no additive)

Preferred Minimum: 2 mL aliquot from random urine
Absolute Minimum: 2 mL aliquot from random urine

Deliver to laboratory immediately after collection.

Include family history, clinical condition (asymptomatic or acute episode), diet, and drug therapy information. Patient's age is required on request form for processing.

4 working days upon receipt at reference laboratory

Age-dependent reference values are listed under "Inborn Errors of Amino Acid Metabolism" in Special Instructions, by report.

When abnormal results are detected, a detailed interpretation is given, including an overview of the results and of their significance, a correlation to available clinical information, elements of differential diagnosis, recommendations for additional biochemical testing and in vitro confirmatory studies (enzyme assay, molecular analysis), name and phone number of key contacts who may provide these studies at the reference laboratory or elsewhere, and a phone number to reach one of the laboratory directors in case the referring physician has additional questions.

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS), Quantitative

Includes quantitation of the following amino acids: taurine, threonine, serine, asparagine, glutamic acid, glutamine, proline, glycine, alanine, citrulline, a-aminoadipic acid, a-amino-n-butyric acid, valine, cystine, cystathionine, methionine, isoleucine, leucine, tyrosine, phenylalanine, b-alanine, b-aminoisobutyric acid, ornithine, lysine, 1-methylhistidine, histidine, 3-methylhistidine, carnosine, argininosuccinic acid, allo-isoleucine, homocitrulline, and arginine.

82139

See Additional Information:
Specimens Requiring Immediate Delivery
Urine Tests Requiring no Preservatives