Test Code 80930 Calcium (Urine)
Purpose
Evaluation of calcium oxalate and calcium phosphate kidney stone risk, and calculation of urinary supersaturation. Evaluation of bone diseases, including osteoporosis and osteomalacia.
Performing Laboratory
Copley Hospital
Methodology
Bichromatic Endpoint
Specimen Requirements
Specimen Type: Urine (Random or 24 hr)
Container/Tube: Sterile Plastic Container
Specimen Volume: 50 mL
Specimen Minimum Volume: 10 mL
Collection Instructions:
1. For 24 Hour Urines: Refrigerate during collection
and follow instructions for “24 Hour Urine Collection”
under “Specimen Collection and Handling” within the
links menu on the left side of the screen.)
2. Label specimen with patient’s full name, date of birth,
date & time of collection (Both Start & End Times for
24-Hour Urines) and person collecting.
3. Refrigerate specimen during transport.
Reference Values
Normal: 50 - 400 mg / 24 Hours
Stability
Refrigerated: 7 Days
Day(s) Performed
Daily
Available STAT
Analytical Time: 1 Day
Aliases
Calcium (Urine)
Calcium Urine
Calcium 24 Hour Urine
Calcium
24 Hour Urine
Urine
Test Classification & CPT Coding
81050 - Urine Timed Measurement
82340 - Calcium