Pathology Handbook

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Alternative Names:

Phenylalanine and Tyrosine (Dried Blood Spot) (as part of Phenylalanine Challenege Test)

Laboratory:

Clinical Biochemistry

Test Code:

PHETYRDBS

Specimen Types:

Blood

Container Types:

See Under Collection Instructions

Collection & Request Instructions:

Specimen Type : Dried Blood Spot on a Guthrie Card

Collected as part of Phenylalanine challenge protocol

Guthrie cards can be collected from Chemical Pathology Registrar ( in stored in office, on shelf in box marked "Guthrie cards")

Transport Instructions between Sites and/or Laboratories:

Store and Transport in paper envelope

Assay Frequency:

Daily

External Laboratory:

Women's and Children's Pathology Services, RCH

Additional Notes:

Only approved as part of a Phenylalanine Challenge Test performed by the Movement Disorders Team.