R U H Bath, return to home page

Pathology Departments Requesting & Reporting Blood Test Information Phlebotomy Guide Contact us
Blood Sciences

Blood Test Information

(a.k.a Dihydropteridine Reductase (DHPR))
minimum sample volume required ~ 5ml

  back to assay index

Tube type: SST

Special instructions
Supply phenylalanine concentration. Fresh blood spots (two 10mm spots) for DHPR analysis
Sent away to Birmingham Children's Hospital NHS Trust

Reference range
See report or contact lab

Turnaround Time
21 days

Department: Biochemistry

Clinical Application
In a small number of cases where raised levels of phenylalanine are found, there is no defect in phenylalanine hydroxylase (PAH), as in typical PKU, but a defect in the synthesis of a cofactor, biopterin.


back to top