Please specify test/s requested on form. If no individual tests are requested, the following analyte excretion rates will be measured:

• Creatinine 
• Calcium 
• Oxalate 
• Phosphate 
• Magnesium 
• Citrate 
• Uric acid 

Note: If required, cystine may be measured in a spot urine sample.

A creatinine excretion test is performed on 24 hour urine collections in order to confirm the adequacy of the collection.

In timed urine collections other than 24 hours, (+/- 2 hours), the 24 hour excretion cannot be calculated due to different day time and night time excretion patterns of various analytes.

Please note that this list of tests requires 2 x 24 hour urine collections; an acid bottle (20 mL of 50% HCl) and a plain bottle.

Please note the time and date of the start and of the end of collection. 

This test cannot be added after 72 hours of collection.