Test Directory

• Creatinine, Urine - per volume
• Creatinine, Urine - per 24 hours
• 17-Ketosteroids - per volume
• 17-Ketosteroids - per 24 hours
• Total Volume
• Hours collected

Specimen Type: 24 Hour Urine 

Collection Container: 24 Hour Plastic Urine Container 

Desired Specimen Volume: 8 mL

1. Collect a 24-hour urine sample via the 24-hour plastic urine container.
2. Record total volume and collection time interval on transport tubes and request form.
3. Adequate refrigeration is the most important aspect of specimen preservation.

1. Transfer 8 mL of urine from a well-mixed 24-hour urine collection into 2 separate clear aliquot tubes (screw cap) - 4 mL of urine in each aliquot tube.

Transport to laboratory refrigerated

See patient report.

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.