Calcium
Label Mnemonic: UCA
Epic Lab Code: LAB580
Downtime Form: A-1a General Laboratory Requisition
Chemistry
6240 RCP
356-3527
Specimen(s):
Urine Quantitative
Collection Medium:
Urine - 24 hour/timed plastic urine container
Alternate Collection Media:
Call laboratory for additional acceptable specimen collection containers.
Minimum:
24 hr urine; no preservative. Collection other than 24 hr will not be calculated for mg/24 hr.
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around Time:
3 hours (upon receipt in laboratory)
Reference Range:
Due to variations in urinary calcium that vary in part based on diet, no reference range used in Epic. 24-Hour urinary calcium concentrations vary with amount of calcium in diet. Calcium-free diet: 5-40 mg Ca/day in urine Low to average calcium intake (up to 800 mg/day): 50-300 mg Ca/day in urine High calcium diet (800 mg/day or more): > 250 mg Ca/day in urine
Methodology:
Colorimetric
CPT Code:
82340