Immunoreactive Trypsinogen Blood Spot (IRT)
Heel prick by clinician. Blood spots must be allowed to dry before putting in envelope.
Hospital.
*If Urgent Colchester Request*: 4 x Blood spots on a Guthrie card (Contact lab)
*If Urgent Colchester Request*: GOSH, TAT: 3d.
For infants less than 56 days only.