Creatinine, Timed Urine


Abbrev Code:UCRT   
Order Code:LAB3823Order Name:Creatinine Timed Urine
Methodology:Roche: Enzymatic
Vista: Bichromatic enpoint calibrated to IDMS
Woodwinds: Kinetic alkaline picrate
CPT Codes: 82570 x1, 81050 x1, 82570 x1, 81050 x1
Turnaround Time:Performed and reported 24 hours/day.
Associated Links:

Urine Collection Procedure, Roche Go Live Schedule



Collection Instructions

Specimen:Urine, timed collection (20 to 28 hours).
Optimal Volume:Submit entire collection; analysis requires 0.2 mL
Container:3 L plastic jug
Collection Instructions:Place specimen on ice or in refrigerator during collection.
Orthostatic Proteinuria Collection Only: Collect two 12 hour collections; one DAY and one NIGHT to diagnose orthostatic proteinuria. Order as two separate collections for their respective times.


Processing and Shipping

Specimen Processing:If two or more containers are received, verify that they are for the same collection time before combining. Mix collection well before aliquot is taken. Centrifuge specimens containing cells or precipitate. Aliquot 5 mL, 0.2 mL minimum. Store in refrigerator.
Acceptable preservatives: HCL or boric acid. Collection on ice preferred but not required. Urine containing bladder fluid is acceptable. Enter coded coment IRRFL (urine contains bladder fluid).
Shipping Instructions:Ship at refrigerated temperature.
Stability:Roche: 2 days at room temperature; 6 days refrigerated; 6 months frozen.
Vista: 4 days refrigerated.
Test Performed at or Referral Lab Chemistry  (Grand Itasca, Northland, Range, Roche-CSC Mpls, Roche-Lakes, Roche-Ridges, Roche-St. John's, Roche-UMMC East, Southdale, UMMC/UMMCH-West Bank, Woodwinds)


Interpretive

Reference Range:Urine Chemistry Reference Ranges
Use:Provide an estimate of time for monitoring excretion of other analytes.


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