Laboratory Test Information Guide

Details for Pterin Analysis, Urine

Test Name: Pterin Analysis, Urine
Alternate Name(s): BH4/NB Ratio
Neopterin/Biopterin Ratio, Urine
PKU-Pterin Deficient
Laboratory: Biochemical Genetics
Specimen Type: Random urine
Collection Information: 2 mL urine collected in 20 mg of ascorbic acid. Collection kits supplied by lab. Wrap sample in foil to protect from light. Sample to be sent immediately to the Core Laboratory and frozen.

Keep at -20°C
Requisition: GENERAL LABORATORY REQUISITION
Test Schedule: Batched approximately every three weeks
Turnaround time from when specimen
is received in testing laboratory:
 
Routine
Batched approximately every three weeks
Stat
 
 
Reference Range: Neopterin:
>1.0 mmol/mol creatinine

Biopterin:
>0.6 mmol/mol creatinine

Neopterin/Biopterin Ratio:
0.2-3.0 Ratio

Tetrahydrobiopterin:
52-86%
Effective Date: 2008-06-10
Revised Date: 2017-06-13
Critical Value:  
Interpretive Comments:  
Special Processing:  
Comments:  
Method of Analysis:  
Critical Information Required:  
Storage & Shipment: Sample must be sent to lab immediately and protected from light.
System Codes: 
Cerner
PTERINU
 
Referred To: Biochemical Genetics Laboratory
London Health Sciences Centre
Victoria Hospital Westminster Tower
Room E3-219
800 Commissioners Road East
London, Ontario
N6A 5W9

519-685-8500
Joanne ext. 71560
Specimen Receiving ext. 71561
Fax: 519-858-1063

Questions? Comments? Contact Laura Gopaul