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HelpTest Code LAB372 Calcium - 24 Hour Urine
Department
CHEMISTRY
Collection Requirements
24 hour urine.
Do not add preservatives to the collection container.
Keep the container on ice or refrigerated during collection.
Empty bladder and discard, note time, collect all urine for 24 hours placing last void in container.
Primary Collection Container
24 HR Urine container
Transport
Refrigerated
Preferred Transport Temperature
Refrigerated
Processing
Keep specimen refrigerated until processing.
Measure total volume.
Acidify a portion of the urine, with 6N HCl, to a pH of < 3.
Aliquot, centrifuge and refrigerate, note total volume and PH on the label.
Stability
Ambient: 2 days
Refrigerated: 4 days
Minimum Testing Volume
1.0 mL
Reference Range
100 – 300 mg/dL
Methodology
Roche c503 photometric
Performed
Sunday – Saturday
6:00 am – 11:00 pm
Reported
As completed
CPT Codes
82340
Unacceptable Conditions
Non-acidified urine.