Calcium, Timed Urine

Sunquest Code:UCAT  
Epic Code:LAB3819Epic Name:Calcium Timed Urine
Order Instructions:Order UCRT in addition to UCAT. Enter collection volume and duration.
Methodology:Bichromatic end point
Test Includes:Urine calcium and creatinine.
Turnaround Time:Performed and reported 24 hours/day.
Associated Links:

Urine Collection Procedure

Collection Instructions

Specimen:Urine, timed collection (20 to 28 hours)
Optimal Volume:Submit entire collection; analysis requires 1 mL
Container:3 L plastic jug
Collection Instructions:Place specimen on ice or in refrigerator during collection.

Processing and Shipping

Specimen Processing:Mix collection well before aliquot is taken. Aliquot 5 mL, 1 mL minimum. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Stability:Refrigerated - 7 days; frozen - 6 months.
Test Performed at or Referral Lab Chemistry  (UMMC-West Bank, UMMC-East Bank, Fairview Ridges - FRH, Fairview Southdale - FSH)


Reference Range:
Ca free diet 0.005 - 0.040 g/24 h
Low to average Ca intake 0.05 - 0.15 g/24 h
Average Ca intake 0.1 - 0.3 g/24/h
  • Suspect hypocalcemia or hypercalcemia
  • Monitor treatment for calcemic disorder.


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