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Test ID: CRC    
Creatinine Clearance, Serum and 24-Hour Urine

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Specimen Type Describes the specimen type needed for testing

Serum
Urine

Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Serum and urine are required. Serum must be drawn within the same 24-hour period as the urine collection.

 

Specimen Type: Serum

Container/Tube: Red top or serum gel

Specimen Volume: 1 mL

Collection Instructions: Label specimen as serum.

 

Specimen Type: Urine

Container/Tube: Plastic, 6-mL tube (Supply T465)

Specimen Volume: 5 mL

Collection Instructions:

1. Collect urine for 24 hours.

2. Refrigerate specimen within 4 hours of completion of 24-hour collection.

3. Label specimen as urine.

Additional Information:

1. 24-Hour volume and patient's height in centimeters and weight in kilograms are required.

2. See Urine Preservatives in Special Instructions for multiple collections.

 

Urine Preservative Collection Options

Ambient

Preferred

Refrigerated

Yes

Frozen

Yes

6N HCl

Yes

50% Acetic Acid

Yes

Na(2)CO(3)

Yes

Toluene

Yes

6N HNO(3)

Yes

Boric Acid

Yes

Thymol

Yes

Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.

Serum: 0.5 mL; Urine 1 mL

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected

Hemolysis

Mild OK; Gross reject

Lipemia

Mild reject; Gross reject

Icterus

NA

Other

NA

 

Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.

Specimen TypeTemperatureTime
SerumRefrigerated (preferred)
 Frozen 
UrineRefrigerated (preferred)
 Ambient 
 Frozen