|
|
5-HIAA
Alternate Names : 5-Hydroxyindole Acetic Acid, HIAA, Serotonin Metabolite
Definition This is a test that measures the amount of 5-HIAA in urine.
Why is the Test Performed?
This test is performed to evaluate the amount of 5-HIAA excreted by the body.
Serotonin is synthesized from the amino acid tryptophan by hormone-producing enterochromaffin cells in the gut and bronchi (airways of the lung). Serotonin increases dilation of blood vessels and platelet aggregation (clumping of platelets). It is metabolized in the liver to 5-HIAA and eventually ends up in the urine.
Today's Top News Stories | • | Clinical Trials Update: Nov. 20, 2008 - Nov 20, 2008, 13:49
- High Cholesterol (Hyperlipidemia)
- Osteoarthritis
- Urinary Incontinence
| • | Texting Food Diaries Helps Kids Stick With Diets - Nov 20, 2008, 09:00
Study found hi-tech method improved compliance more than paper and pencil. | • | Parent Smoking During Pregnancy Raises Kids' Heart Risks - Nov 20, 2008, 12:00
More carotid artery thickening in these young adults points to danger, study finds. | • | Vitamin D Deficit Could Lead to Heart Woes - Nov 20, 2008, 12:00
Winter's lack of sun means adults at risk should be monitored, experts say. | • | When the Caregiver Becomes the Patient - Nov 20, 2008, 14:00
Study finds those tending Alzheimer's relatives at risk for hospital visits of their own. |
|
Jump to another section
• Definition
• Why is the Test Performed?
• How is the Test Performed?
• How to Prepare for the Test?
• How will the Test Feel?
• Normal Values
• What do Abnormal Results Mean?
• Special Considerations
• Risks
Topics that might be of interest to you Tests & Exams
• Platelet Count
• Serum Serotonin Level
Other Topics
• Tryptophan
Review Date : 9/14/2003
Reviewed By : Corey Cutler, M.D., M.P.H., F.R.C.P.C., Department of Medical Oncology, Dana-Farber Cancer Institute; Instructor in Medicine, Harvard University, Boston, MA. Review provided by VeriMed Healthcare Network.
|
|
