• Test Code - PL0768
  • Test Name - Norepinephrine Plasma
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Test Details & Preparation


  • Norepinephrine Plasma testing is done to help diagnose or rule out a pheochromocytoma or other neuroendocrine tumour.

  • Norepinephrine Plasma testing is performed when you have symptoms of increased catecholamine release, such as persistent or episodic high blood pressure, severe headaches, rapid heart rate, and sweating.

  • A blood sample drawn from a vein in the arm or a 24-hour urine sample for a Norepinephrine Plasma testing.

  • Norepinephrine Plasma testing is affected by certain drugs, foods, and stresses. Inform your doctor of any medications you are taking and follow any preparation instructions you are given before sample collection.

  • If catecholamine levels are elevated in a person who has had a previous pheochromocytoma, then it is likely that either treatment was not fully effective or that the tumour is recurring.

  • If the concentrations of catecholamine are normal in both the plasma and urine, then it is unlikely that a person has a pheochromocytoma. Pheochromocytoma does not necessarily produce catecholamine at a constant rate, however.


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