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Uric Acid, 24 hour (or timed) urine

Item Value
Approval req'd? Yes, if testing is requested between midnight and 8:00 AM.
Available Stat? No
Test code UCAU
Test group Uric acid
Performed by Parnassus & Mission Bay Chemistry
In House Availability Test available 7 days per week from 8:00 AM to midnight only.
Method Spectrophotometric (uricase)
Collection Instructions Keep collection container at room temperature during the period of collection.

Note that the minimum acceptable time period for a 'timed' collection is 6 hours.

Results of collections of less than 24 hour duration will be adjusted to reflect a '24 hour collection'. The limited time of collection as well as the need to adjust the values to be comparable to the '24 hour' normal ranges will inherently affect the accuracy of the results.
Container type 24 hour urine collection container

Click here for Urine Preservative Requirements
Amount to Collect Entire urine output during collection period
Sample type Timed urine collection
Preferred volume 1 mL urine
Min. Volume 0.25 mL urine
Units mg/D
Normal range 250-750mg/D
Stability Refrigerated 2 days
Turn around times Same or next day
Additional information To convert mg/dL to mmol/L (SI units) multiply by 0.059.

Output varies with diet.

Results of collections of less than 24 hour duration will be adjusted to reflect a '24 hour collection'. The limited time of collection as well as the need to adjust the values to be comparable to the '24 hour' normal ranges will inherently affect the accuracy of the results.
Last Updated 1/28/2015 3:35:40 PM
Entry Number 969
Lab Procedure Link Click here for Procedure
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