Thiopurine Methyltransferase (TPMT)
Phlebotomy Requirements
Samples must not be taken <3m post blood transfusion. Provide a recent Hb result on all referrals for TPMT assay.
Collection
Hospital or GP.
Sample container
All Colchester & Ipswich samples: 2 x 3.4ml Red EDTA. Min vol: 4ml.
Site
All Colchester & Ipswich samples: Guy's & St Thomas', TAT: 2w.
Notes
Non-fasting. No specific patient preparation required.
