EDTA on ice to lab within 30 mins
Investigation of possible neuroendocrine tumours of the G.I. tract.
Rare endocrine tumours of the pancreas and gut can be detected by the measurement of circulating fasting plasma levels of these gut hormones.
Fast the patient overnight.
Warn the Duty Biochemist (Ext. 2935) that the sample is going to be taken.
Take 7.5 ml blood into a EDTA tube
Send samples to the laboratory immediately, with the EDTA sample kept on ice.
Mark the request form for ‘Gut hormones’
Please give full details of drug therapy.
If in doubt, consult the Duty Biochemist.
Care must be taken over interpretation. For example, hypercalcaemia and achlorhydria or hypochlorhydria are far commoner causes of a raised gastrin than a gastrinoma.
Assayed by the Hammersmith Pathology Center Imperial College London/Hammersmith Hospital Tel 020 8383 2148Specimen Labelling Procedure