CALCIUM CREATININE RATIO URINE

Sterile urine container and if needed a 24 hour urine container

•  If 24 hour collection collect all urine voided for 24 hours and place in the 24 hour urine container. 
•  The collection container is to be kept in the refrigerator or on ice during the timed period. 
•  Note the total number of hours and volume of urine collection on the aliquot for 24 hour urine sample.

Max: 5 ml preferred 
Min:  1 ml

•  Reported in mg per g Creatinine 
•  Calculation for the ratio = Urine Calcium / Urine Creat times 1000

None

• Refrigerate
• Note the number of hours of urine collection on the aliquot if 24 hour collection.
• Give aliquot to Core Lab so a tech can acidify with 2-3 drops of 6N HCL for the urine calcium.

Refrigerated

Insufficient volume

No reference range for the ratio.  The ratio is reported in mg / g Creatinine.

Both the 24 hour collection and the random collection, the ratio result is reported in mg / g of Creatinine.