ARUP's Laboratory Test Directory

Calcium, Urine : 0020472

Mnemonic: UCA

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

Specimen Preparation: Adjust pH to 1.5-2.0 by adding 6M HCl in 1 mL increments. Transfer one 3 mL aliquot from a well-mixed 24-hour collection to an ARUP Standard Transport Tube. (Min: 0.5 mL) Record total volume, collection time interval, and pH on transport tube and test request form.

Storage/Transport Temperature: Refrigerated.

Stability (collection to initiation of testing): Ambient: 48 hours; 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) Effective February 21, 2012

Greater than 250 mg/d
 Creatinine, Urine - per 24h  
 
Age Male Female
3-8 years 140-700 mg/d 140-700 mg/d
9-12 years 300-1300 mg/d 300-1300 mg/d
13-17 years 500-2300 mg/d 400-1600 mg/d
18-50 years 1000-2500 mg/d 700-1600 mg/d
51-80 years 800-2100 mg/d 500-1400 mg/d
81 years and older 600-2000 mg/d 400-1300 mg/d
 Calcium/Creatinine Ratio, Urine  
 
Age Male Female
0-11 months
12-23 months
24-35 months
3-4 years
5-6 years
7-9 years
10-12 years
13-15 years
16-17 years
18 years and older 		30-810 mg/g
30-560 mg/g
20-500 mg/g
20-410 mg/g
10-300 mg/g
6-431 mg/g
8-300 mg/g
6-293 mg/g
10-264 mg/g
20-240 mg/g 		30-810 mg/g
30-560 mg/g
20-500 mg/g
20-410 mg/g
10-300 mg/g
11-457 mg/g
12-309 mg/g
8-313 mg/g
20-271 mg/g
20-300 mg/g

CPT Code(s): 82340