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PTD - 239

Test Directory - Gastrin (Gut Hormones)


Clinical Indications

Diagnosis of the Zollinger-Ellison syndrome (gastrin-producing tumour)

Part of Profile

Gut Hormone profile (GIT)

Request Form

Combined Pathology Blood form (Yellow/Black)


Analysed by Clinical Biochemistry, Charing Cross Hospital, London if specific criteria met.

Specific Criteria

Agreed with Consultant Biochemist. Please provide details of all drugs currently administered, details of any gastric surgery, basal and stimulated acid output.

Patient Preparation

Patient should be fasting. H2 antagonists should be stopped for 72 hours, and omeprazole for 2 weeks. Patients must attend Basildon phlebotomy for sample collection.

Turnaround Time

1 month




2 ml


Large purple top (EDTA) tube.

Samples must be transported to laboratory immediately. Yellow top (SST) tubes should not be used.


Samples should be transported to laboratory immediately.

Causes for Rejection

Visible haemolysis invalidates the result.

Reference Range

Provided on report


Full interpretation provided with the referral report.

Lab. Handling

Processing: Centrifuge and aliquot within 15 minutes of venepuncture into 2 tubes and freeze at -20C in separating freezer (CB40), active frozen rack 110.
Referral: SASOD and send or BPRO and save in separating freezer (CB40), at -20C in the saved frozen rack.

Version 1.0 / June 2014                                                                                                          Approved by: Consultant Biochemist