Creatinine Clearance, Serum and 24 Hour Urine

Important Note

• Both serum and urine are required. Serum must be collected no earlier than 24 hours before start of urine collection and no later than 24 hours after urine collection is completed.

Specimen Type: Serum
Collection Container: Serum gel
Specimen Volume: 3 mL

Specimen Type: Urine
Collection Container: 24 hour collection kit
Specimen Volume: 3 mL

Serum: 0.5 mL

Urine: 1 mL

1. Label specimen as serum.
2. Centrifuge and separate cells after clot formation and within 4 hours of collection. 

1. Collect urine for 24 hours.
2. Refrigerated specimen with 4 hours of complettion of 24-hour collection.
3. This test does not require the use of a chemical preservative. 
4. Patient 24 Hour Collection Instructions

Processing 24-hour urine specimens

1. Measure the total volume of the specimen.
2. Mix the specimen well.
3. Order 24URN in Soft and enter prompted information.
4. Aliquot/transfer at least 3 mL specimen into plastic clear top (no additive) vacutainer tube.
5. IL 24-hour Urine Pre-Analytical Processing Job Aid

Serum
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 3 months

Urine
Room temperature: 2 days
Refrigerated: 6 days
Frozen: 6 months

Unlabeled, mislabeled, wrong tube type, hemolyzed, QNS, exceeds specimen stability requirements.

Daily

Same day