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Test Code U Phenylb Phenylbutyrate, Urine

Additional Codes

Phenylbut

Clinical System Name

Phenylbutyrate, Urine

Description

This assay measures the levels of phenylacetylglutamine (PAG) and its upstream metabolites phenylbutyrate and phenylacetate in urine.

Sample Requirements

Specimen: Urine

Container(s): Sterile Container

Preferred Vol: 4 mL

Minimum Vol: 2 mL

 

Note:

Processing Instructions

Reject due to:

Spin: N

Aliquot: Y

Temp: -20 C

Storage Location: CPA -20 freezer, Send Outs rack.

 

Off-site collection: Aliquot specimen as soon as possible. Send 1-2 mL of urine on dry ice to Seattle Children's Main Lab. It is preferable that the sample is received by Seattle Children's Main Lab within 5 days from the date of collection.

 

Note: Do not add preservatives.

Stability

Specimen Type Temperature Time
  Room temp N
  Refrigerated N
  Frozen 7 d

 

Availability

STAT Performed TAT
    8 d

 

Performing Laboratory

Baylor Miraca Genetics Laboratories

Biochemical Genetics Laboratory

2450 Holcombe, Grand Blvd. - Receiving Dock

Houston, TX 77021-2024

 

Phone Number: (713) 798-6555

Department

Department: Send Outs

Phone Number: (206) 987-2563

Methodology

Method: LC-MS/MS

Analytical Volume:

Limitations:

CPT Codes

82542 x3

83789

82570

Send Out Instructions

Reference Test Name Phenylbutyrate Metabolite Analysis
Reference Test Code 4651
Instructions Send frozen overnight to Baylor via FedEx. Will accept Saturday deliveries.