Table of Contents
What does Metanephrine free mean?
The test measures the level of a substance called free metanephrine in your blood to find out if your body is producing too much adrenaline or noradrenaline. This can be caused by a condition called phaeochromocytoma – a tumour on the adrenal glands which is usually non- cancerous (benign).
What does a high Metanephrine level mean?
Higher levels of metanephrines may mean that you have an adrenal gland tumor. But false-positive results can happen. Higher levels may also be caused by obstructive sleep apnea, stress, or other illnesses.
What is plasma metanephrines?
What is a plasma metanephrines test? This is a blood test that is primarily used when a doctor either suspects a person has a phaeochromocytoma (a very rare adrenal gland tumour) or wants to rule out this possibility.
How do you read metanephrines test results?
What do my test results mean?
- If your 24-hour metanephrine level is between 1 and 2 times the normal amount, there is about a 30% chance you have a pheochromocytoma or paraganglioma.
- If your 24-hour metanephrine level is twice the normal level or higher, it’s likely that you have a pheochromocytoma or paraganglioma.
What should I avoid before a Metanephrine test?
Patient Preparation Patient should avoid alcohol, coffee, tea, tobacco and strenuous exercise prior to collection.
What does metanephrine plasma free mean?
Metanephrine, plasma free, fractionated plasma free metanephrines What is this test? This test measures the substances metanephrine and normetanephrine in your blood. It helps find out if you have a tumor of the adrenal glands called pheochromocytoma. The adrenal glands sit on top of your kidneys.
What does a negative metanephrine test result mean?
The plasma free metanephrines test is very sensitive and these tumors are rare, so the negative predictive value of the test is very good. High levels of metanephrine and normetanephrine in a person with signs and symptoms suggest the presence of a catecholamine-secreting tumor.
How do you collect blood for plasma metanephrine testing?
Blood for plasma metanephrine testing is collected by inserting a needle into a vein in your arm. Although you may be seated for the collection, it is recommended that you be lying down. The healthcare provider or the collection site will instruct you as to their specific requirements. These tests are affected by certain…
What does it mean if my metanephrines are high?
Higher levels of metanephrines may mean that you have an adrenal gland tumor. But false-positive results can happen. Higher levels may also be caused by obstructive sleep apnea. How is this test done? The test is done with a blood sample. A needle is used to draw blood from a vein in your arm or hand. Does this test pose any risks?