- Patient Preparation
- 24-hour urine. Refrigerate during collection.
- Specimen Preparation
- Transfer 4 mL aliquot from a well-mixed 24-hour urine collection to an ARUP Standard Transport Tube or ARUP supply #48098 (ARUP Standard Transport Tube with 12 mg Sulfamic Acid) (Min: 3 mL). Record total volume and collection time interval on transport tube and test request form. Adequate refrigeration is the most important aspect of specimen preservation. Preservation can be enhanced by adjusting the pH to 2-4 by addition of 6 mol/L HCl or by using ARUP supply #48098, available online through e Supply using ARUP Connect™ or by contacting ARUP Client Services at (800) 522-2787.
Note: use caution when adjusting with 6 mol/L HCl as a pH of less than 2 will decrease analyte stability.
- Storage/Transport Temperature
- Unacceptable Conditions
- Ambient: 4 hours; Refrigerated: 2 weeks; Frozen: 1 month
|Test Number||Components||Reference Interval|
|Creatinine, Urine - per 24h|| |
A large number of substances may interfere with this test. Decreases may be caused by carbamazepine, cephaloridine, cephalothin, chlormerodrin, digoxin, glucose, metyrapone, promazine, propoxyphene, reserpine, and others. Increases may be caused by acetone, acetophenide, ascorbic acid, chloramphenicol, chlorothiazide, chlorpromazine, cloxacillin, dexamethasone, erythromycin, ethinamate, etryptamine, methicillin, methyprylon, morphine, oleandomycin, oxacillin, penicillin, phenaglycodol, phenazopyridine, phenothiazine, piperidine, quinidine, secobarbital, spironolactone, and others.
|Component Test Code*||Component Chart Name|
|0020207||Creatinine, Urine - per volume|
|0020208||Creatinine, Urine - per 24h|
|0080190||17-Ketosteroids - per volume|
|0080191||17-Ketosteroids - per 24h|