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Measures

Number of red blood cells in the blood

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Red blood cell disorders

Measures: Number of red blood cells in the blood

Identifies: Red blood cell disorders

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What is the maximum days the report can be obtained for the test

Homovanillic Acid (HVA) 24 Hr Urine Test

The maximum days the report can be obtained for the test is typically 7-10 days after the sample is collected. This allows for adequate time for the sample to be processed, analyzed, and the results to be reviewed by a healthcare provider.

What are the prerequisites for the test Homovanillic Acid (HVA) 24 Hr Urine Test

  • Collect a 24-hour urine sample in a clean container with no preservatives.
  • Avoid foods high in vanillin (vanilla) or vanillic acid for at least 3 days before the test.
  • Avoid foods high in catecholamines (chocolate, bananas, tomatoes, and avocados) for at least 3 days before the test.
  • Avoid strenuous exercise for 24 hours before the test.
  • Avoid smoking for at least 24 hours before the test.
  • Inform your healthcare provider about any medications you are taking, as some medications can interfere with the test results.

What are the measure values for the test Homovanillic Acid (HVA) 24 Hr Urine Test

  • Normal range: 1-8 mg/24 hr
  • Elevated levels may indicate: Parkinson's disease, schizophrenia, or neuroblastoma
  • Decreased levels may indicate: Tyrosine hydroxylase deficiency

What does this test Homovanillic Acid (HVA) 24 Hr Urine Test identify?

Homovanillic Acid (HVA) 24 Hr Urine Test
The HVA 24 Hr Urine Test is a diagnostic test that measures the levels of homovanillic acid in a person's urine over a 24-hour period. Homovanillic acid is a metabolite of dopamine, a neurotransmitter that plays a crucial role in mood regulation, movement control, and other essential functions in the brain.
Identifies:
1. Neurotransmitter Imbalance: Abnormal levels of HVA can indicate an imbalance in dopamine levels, which may be associated with conditions such as Parkinson's disease, schizophrenia, or depression.
2. Neuroendocrine Tumors: Elevated levels of HVA in the urine may indicate the presence of neuroendocrine tumors, such as pheochromocytoma or neuroblastoma.
3. Monitoring Treatment: The HVA 24 Hr Urine Test can also be used to monitor the effectiveness of treatment for certain neurological or psychiatric disorders that involve dopamine dysregulation.

Why is this test Homovanillic Acid (HVA) 24 Hr Urine Test taken?

Homovanillic Acid (HVA) 24 Hr Urine Test

The Homovanillic Acid (HVA) 24 Hr Urine Test is taken to measure the levels of HVA in the urine over a 24-hour period. HVA is a metabolite of dopamine, a neurotransmitter that plays a key role in the brain's reward system and motor function. Abnormal levels of HVA can indicate certain neurological disorders, such as Parkinson's disease or neuroblastoma.

By measuring HVA levels in the urine, healthcare providers can assess dopamine metabolism and help diagnose or monitor the progression of these neurological conditions. The test is often used in combination with other tests and clinical evaluations to provide a comprehensive assessment of a patient's neurological health.

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