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Urine Calcium, 24 Hour
Test CodeLAB814
CPT Codes
82340
Instructions
"Urine voided within a 24 hour period. Refrigerate during collection. Amber/Orange urine container.
See instructions below:
Urine Testing, Timed, 24-Hour Collection
For proper evaluation of tests on a 24-hour urine sample, it is important that a complete and accurate collection is made. The patient should be instructed to collect urine as follows.
1. Patient should drink normal amount of liquids during the collection period, unless otherwise instructed.
2. Empty bladder when you get up in the morning. Discard this urine, and note the date and time.
3. From then on, collect in a clean bottle, all urine you pass during the day and night. (Be sure if having a bowel movement not to allow any urine to be discarded. Void before bowel movement and save the urine.)
4. Make the final collection when you empty your bladder the next morning at the same hour.
5. Keep the collected urine refrigerated, if possible, and bring it to the office or laboratory as soon as possible after the 24-hour collection is complete.
Note: When a 24-hour collection on a test performed at CHOMP Laboratory is requested, a creatinine determination will be performed at no charge to ensure that a valid specimen has been obtained"
See instructions below:
Urine Testing, Timed, 24-Hour Collection
For proper evaluation of tests on a 24-hour urine sample, it is important that a complete and accurate collection is made. The patient should be instructed to collect urine as follows.
1. Patient should drink normal amount of liquids during the collection period, unless otherwise instructed.
2. Empty bladder when you get up in the morning. Discard this urine, and note the date and time.
3. From then on, collect in a clean bottle, all urine you pass during the day and night. (Be sure if having a bowel movement not to allow any urine to be discarded. Void before bowel movement and save the urine.)
4. Make the final collection when you empty your bladder the next morning at the same hour.
5. Keep the collected urine refrigerated, if possible, and bring it to the office or laboratory as soon as possible after the 24-hour collection is complete.
Note: When a 24-hour collection on a test performed at CHOMP Laboratory is requested, a creatinine determination will be performed at no charge to ensure that a valid specimen has been obtained"
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Ambient specimen.
Methodology
Colorimetric:The amount of colored complex formed is proportional to the calcium concentration in the sample.
Setup Schedule
Daily
Report Available
Within 24 hours
Reference Range
"
Test
Gender
Reference Interval
Urine Calcium
Any
None established
Urine Calcium per 24 hours
Any
100-300 mg/24 Hr
Urine Creatinine
Any
None established
Urine Creatinine per 24 hours
Female
0.8-1.8 mg/24 Hr
Male
1.0-2.0 mg/24 Hr
"
Test
Gender
Reference Interval
Urine Calcium
Any
None established
Urine Calcium per 24 hours
Any
100-300 mg/24 Hr
Urine Creatinine
Any
None established
Urine Creatinine per 24 hours
Female
0.8-1.8 mg/24 Hr
Male
1.0-2.0 mg/24 Hr
"
Clinical Significance
Urinary calcium is used in the differential diagnosis of absorptive hypercalciuria and hypercalciuria caused by hyperparathyroidism, hyperthyroidism, Paget disease, or “renal leak” type of calciuria as seen in renal tubular acidosis.
Additional Information
24 Hour Urine Collection Instructions
