Creatinine, timed urine

Alphabetical Test listing

Creatinine, timed urine-85

Test name:

Test number:

Excellian order number:

82570.2

Abbreviation:

CRT

Specimen type:

Urine, 24 hr

Collection container:

24 hr urine collection container, no additive

Collection instructions:

Collect specimen for 24 hrs, or, specified time period; note length of time on request.

How to collect a 24 hr urine sample

Processing instructions:

Record total urine volume
Mix 24 hour specimen well
Transfer an 8 mL aliquot of a well-mixed 24 hour collection to a Urine aliquot transport vial/tube - 10mL (AHL)
Patient's weight is required.

Transport container:

Urine aliquot transport vial/tube - 10mL (AHL)

Alternate collection container:

24 hr urine collection with 10g Boric Acid preservative

24 hr urine collection with HCl preservative (acceptable, but not preferred)

Alternate transport container:

24 hr urine collection container, no additive (acceptable, but not preferred)

Transport and stability:

Refrigerated (preferred) - 6 days

Ambient - 2 days

Frozen - 6 months

Reason for rejection:

Improper labels (unlabeled or mislabeled)
Hemolysis (some procedures)
Delay in transport
Improper storage temperature affecting results
Inappropriate timing of collection
Improper container
Leaking container resulting in compromised specimen
Quantity not sufficient (QNS)

Performing lab:

AHL - Chemistry: C

Days set up:

Daily

TAT:

1 day

Method:

Kinetic - Jaffe (Alkaline Picrate)

Reference ranges:

Male: 12 - 28 mg/kg/24hrs
Female: 11 - 26 mg/kg/24hrs

CPT codes:

82570

Date created:

11/30/2001

Revised date:

08/28/2019

Review date:

11/09/2021