ARUP's Laboratory Test Directory

Calcium, Urine : 0020472

Mnemonic: UCA

Methodology: Spectrophotometry
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect:  24-hour urine sample. Also acceptable: random urine. Urine must be refrigerated during collection.

Transport:  4.5 mL aliquot from a well-mixed 24-hour collection at 2-8°C. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube.

Pediatric Collection/Transport:  0.5 mL aliquot from a random collection at 2-8°C.

Remarks:  Adjust pH to 1.5-2.0 by adding 6M HCl in 1 mL increments.  Record total volume, collection time interval, and pH on transport tube and test request form.

Stability:  Ambient: 2 days; Refrigerated: 4 days; Frozen: 3 weeks
Reference Interval:
 
Test Number Components Reference Interval
 Calcium free diet: 5-40 mg/d 5-40 mg/d
 Low Calcium Diet (800 mg/d or less): 50-150 mg/d
 Average Calcium diet (about 800 mg/d): 100-250 mg/d
 High Calcium diet (800 mg/d or greater): 250 mg/d or greater
 Creatinine (24-hour)  
 
Male Female
3-8 years: 140-700 mg/d
9-12 years: 300-1300 mg/d
13-17 years: 500-2300 mg/d
18-50 years: 1000-2500 mg/d
51-80 years: 800-2100 mg/d
81 years and older: 600-2000 mg/d 		3-8 years: 140-700 mg/d
9-12 years: 300-1300 mg/d
13-17 years: 400-1600 mg/d
18-50 years: 700-1600 mg/d
51-80 years: 500-1400 mg/d
81 years and older: 400-1300 mg/d
 Calcium/Creatinine Ratio, Urine  
 
Age Male Female
0-11 months 30-810 mg/g 30-810 mg/g
12-23 months 30-560 mg/g 30-560 mg/g
24-35 months 20-500 mg/g 20-500 mg/g
3-4 years 20-410 mg/g 20-410 mg/g
5-6 years 10-300 mg/g 10-300 mg/g
7-9 years 7-589 mg/g 7-589 mg/g
10-17 years 5-355 mg/g 5-355 mg/g
18 years and older 20-240 mg/g 20-300 mg/g

CPT Code(s): 82340
 
 

 

 

 
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