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22402 Calcium/Creatinine Urine Ratio

Calcium/Creatinine Urine Ratio
Test Code: CA-CR
Synonyms/Keywords
Urine Calcium/Creatinine Ratio​
Test Components
Urine Calcium, Urine Creatinine​
Useful For
Monitoring of Urine Calcium​
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​
Urine, 2nd morning random specimen (collected between
8:00 a.m.-11:00 a.m.)
50 mg sulfamic acid aliquot tube
Tube or sage container and acidify with dilute hydrochloric acid to a pH <5
 10 mL​ 5 mL​ 2 mL​
Collection Processing Instructions
Collect a second morning random urine, preferably collected between 8:00 a.m. and 11:00 a.m.  Pediatric: For untrained children, collect from 6:00 a.m. - 11:00 a.m.
 
Adjust urine pH to < 5 with sulfamic acid or dilute hydrochloric acid. Acceptable, but not preferred: collect without preservative, keep refrigerated. Acidify upon arrival to lab and prior to analysis.
Specimen Stability Information
Specimen Type Temperature Time
Urine​ Refrigerate​ 14 days​
Performing Laboratory Information
Performing LocationDay(s) Test PerformedAnalytical TimeMethodology/Instrumentation
Marshfield​Monday through SundayLess than 2 hours

Arsenazo III Endpoint Assay - Calcium

Alkaline Picrate - Creatinine​

Beckman AU

Reference Range Information
Performing Location Reference Range
Marshfield​
Age 0-1 year:  0.03-0.81 mg Ca/mg Creat
Age 1-2 years: 0.03-0.56 mg Ca/mg Creat
Age 2-3: 0.02-0.50 mg Ca/mg Creat
Age 3-5: 0.02-0.41 mg Ca/mg Creat
Age 5-7: 0.01-0.30 mg Ca/mg Creat
Age 7-10: 0.01-0.25 mg Ca/mg Creat
Age > or = 10: 0.01-0.22 mg Ca/mg Creat​
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
82310​ ​ ​1 ​Assay of calcium ​
​82570 ​ ​1 ​Assay of urine creatinine ​
Synonyms/Keywords
Urine Calcium/Creatinine Ratio​
Test Components
Urine Calcium, Urine Creatinine​
Ordering Applications
Ordering Application Description
​Centricity ​Ca/Creat Ratio (Cal)
​Cerner Calcium/Creatinine Urine Ration, Random​
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​
Urine, 2nd morning random specimen (collected between
8:00 a.m.-11:00 a.m.)
50 mg sulfamic acid aliquot tube
Tube or sage container and acidify with dilute hydrochloric acid to a pH <5
 10 mL​ 5 mL​ 2 mL​
Collection Processing
Collect a second morning random urine, preferably collected between 8:00 a.m. and 11:00 a.m.  Pediatric: For untrained children, collect from 6:00 a.m. - 11:00 a.m.
 
Adjust urine pH to < 5 with sulfamic acid or dilute hydrochloric acid. Acceptable, but not preferred: collect without preservative, keep refrigerated. Acidify upon arrival to lab and prior to analysis.
Specimen Stability Information
Specimen Type Temperature Time
Urine​ Refrigerate​ 14 days​
Useful For
Monitoring of Urine Calcium​
Test Components
Urine Calcium, Urine Creatinine​
Reference Range Information
Performing Location Reference Range
Marshfield​
Age 0-1 year:  0.03-0.81 mg Ca/mg Creat
Age 1-2 years: 0.03-0.56 mg Ca/mg Creat
Age 2-3: 0.02-0.50 mg Ca/mg Creat
Age 3-5: 0.02-0.41 mg Ca/mg Creat
Age 5-7: 0.01-0.30 mg Ca/mg Creat
Age 7-10: 0.01-0.25 mg Ca/mg Creat
Age > or = 10: 0.01-0.22 mg Ca/mg Creat​
For more information visit:
Performing Laboratory Information
Performing LocationDay(s) Test PerformedAnalytical TimeMethodology/Instrumentation
Marshfield​Monday through SundayLess than 2 hours

Arsenazo III Endpoint Assay - Calcium

Alkaline Picrate - Creatinine​

Beckman AU

For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
82310​ ​ ​1 ​Assay of calcium ​
​82570 ​ ​1 ​Assay of urine creatinine ​
For most current information refer to the Marshfield Laboratory online reference manual.