4 - 11 days
Test Updated:
HST-24
HISTAMINE, 24-HOUR, URINE
HST24
Histamine, 24-Hour Urine
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Test Overview
Immunoassay
Documentation of immediate hypersensitivity reactions or diagnosis of patients with systemic mastocytosis. Elevated values are seen in patients with anaphylaxis, with urticaria, or following provocative skin tests.
0.006 - 0.131 mg/24 hour
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Specimen Requirements
Collect 24 hour urine specimen. Add 10 mL of 6 N HCl to container prior to start of collection. Following collection, mix well, measure 24 hour urine volume, aliquot 4 mL into a plastic urine container and refrigerate. Record total 24 hour urine volume and collection dates/times on request form. Specimens with no preservative are also acceptable: add HCl to container following collection, mix well and send 4 mL aliquot (preferred); alternatively a non-acidified aliquot will be accepted. Patient should void antihistamines, oral corticosteroids, and substances that block H2 receptors for at least 24 hours prior to specimen collection.
