5-Hydroxyindoleacetic Acid Urine 24 Hour
Ordering Info & Methodology
Test Code
Cerner Synonyms
HIAAU
5HIAA Urine 24 Hr, 5-HIAA, 5HIAA, serotonin, 5-hydoxy indole acetic acid
Turn Around Time
Methodology
Ordering Guide
Add CRU, UTIM
Specimen Requirements
Sample Type
Collection Container
Alternate Collection Containers
Urine
Urine collection jug
24h collection
Add on stability
This is the length of time after sample collection that this analyte is stable. Test can be added to a previously collected sample if the time since collection is less than the add on stability time.
Minimum Volume
Add On Stability
Collection and Shipping Requirements
Adjust pH to 2-3 and aliquot 50mL of well mixed 24h collection. Refrigerate, send on ice pack.
Reference Intervals
Female Reference Interval
Age Category | Reference Interval | units |
|---|---|---|
Male Reference Interval
Age Category | Reference Interval | units |
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Additional Notes
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Measurement Uncertainty (MU)
Every laboratory value is an estimate of the true concentration of substance. MU is the 95% confidence interval around that estimate. 95% of the time, the true concentration will be within the range of the reported value ±MU. This value is based on analytical variability (precision) and does not reflect other factors such as sample collection and handling which may also affect the result.
Example
Reported sodium = 140 mmol/L
Sodium MU = 1%
Expanded uncertainty = 140 mmol/L ± 1% or 140mmol/L ± 1.4 mmol/L
Interpretation - the true value of sodium in the sample is in the range 138.6-141.4 mmol/L, with 95% confidence.
Measurement Uncertainty
For 48h prior to and during collection, patients should avoid the following foods and medications:
Foods
avocados
bananas
butternut squash
melons
dates
kiwis
eggplants
grapefruit
nuts
pineapple
plums
tomatoes
Medications
L-dopa
acetaminophen
salicylates (ASA)
cough syrups containing guaifenesin