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HelpTest Code LAB712 Urine Creatinine, Timed Collection
Clinical System Name
Creatinine 24 Hour Urine
Synonyms
CRE U QNT
Sample Requirements
Specimen: Urine
Container(s): 24 hour urine container
Preferred Vol: 24 hour collection
Minimum Vol: Timed collections other than 24 hr are acceptable.
Note: No preservatives are needed to start collection. Please contact lab to obtain collection container (ext. 7-2102). Refrigerate specimen during collection. Document start and stop dates and times with patient information. Deliver labeled container to clinical lab upon completion.
Processing Instructions
Reject due to:
Spin: N
Aliquot: N
Temp: 2-8 C
Storage location: Store labels in CPA refrigerator, FrigB bucket. Urine is stored in CPA refrigerator. Timed collections other than 24 hr are acceptable.
Off-site collection: No preservatives are needed to start collection. Please notify lab to obtain collection container (206) 987-2102. Refrigerate specimen during collection. Document start and stop dates and times with patient information. Send primary collection container refrigerated to main campus for processing.
Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Room Temp |
3 d |
| Refrigerated |
5 d |
|
| Frozen |
6 m |
Availability
| STAT | Performed | TAT |
|---|---|---|
| N | M - F, day shift | 1 - 3 d |
Performing Laboratory
Seattle Children's Laboratory
Department
Department: Chemistry
Location: Chem East
Phone Number: 206-987-2617
CPT Codes
82570
Methodology
Method: Enzymatic rate method by Vitros 4600
Analytical Volume: 0.5 mL
Limitations: Method is affected by fecal contamination, loss of specimen during collection, Loss of 10% of total urine collected invalidates the test.
Reference Range
| mg/24 hr | |
|---|---|
| Newborn | 25 - 50 |
| Up to 2 Years | 50 - 200 |
| 3 - 10 Years | 200 - 700 |
| 10 - 13 Years | 700 - 1000 |
| 13 - 17 Years | 800 - 1300 |
| Adult Female | 900 - 1400 |
| Adult Male | 1500 - 2000 |