The Leeds Teaching Hospitals NHS Trust

Phenylalanine / Tyrosine

Phenylalanine / Tyrosine

This test is used for the monitoring of patients with phenylketonuria (PKU) and tyrosinaemia.

Tube Bloodspots on a neonatal screening card for monitoring of PKU / tyrosinaemia patients otherwise please send lithium heparin sample
ID 29979
Availability Weekdays
Turn Around 7 days. Please contact the Biochemical Genetics laboratory for enquiries regarding urgent samples (0113 2064256).
Send to Specialist Laboratory Medicine
Block 46
St James hospital
Beckett Street
Collection Con Minimum volume: Ideally 2 full spots

Instructions for lab: Send to Block 46. If storage required (overnight or over the weekend) store dried blood spot card at room temperature.

Please discuss with Biochemical Genetics lab prior to rejecting any samples.
Frequency Analysis performed on Tuesday and Thursday.
Sample REQ Dried blood spots. If a full amino acid profile is required please send a lithium heparin blood sample for amino acid analysis.
Ref. Range Notes Contact the appropriate clinical metabolic team for advice on interpretation.
Units µmol/L
Telepath Blood spot phenylalanine/ tyrosine: PKUB1J