Your doctor has requested that you provide a urine sample for measurement of substances called “metanephrines”. These are hormones which are produced by the adrenal gland and act to control blood pressure, and are also called “metadrenalines”.
Please avoid the following on the days you are collecting the sample and for the 24 hours before you start the collection, as they can raise the levels of these hormones in your urine, giving a false result:
Please check the request form that your doctor has given you. All the medications that you are taking need to be recorded on the form, so please add any that have been missed in the box that says “Clinical details”, or in a blank space on the form.
If you would like to learn more about this test, or any other test that your doctor has ordered, you can visit LabTestsOnLine, which is a free re-source created and updated by laboratory professionals for patients: http://www.labtestsonline.org.uk/
We have prepared an information leaflet that gives instructions on collecting your 24 hour urine sample.
Biochemistry - Patient Information for 24h Urine Collection for Metanephrines
