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Test ID: CITR    
Citrate Excretion, 24 Hour, Urine

Specimen Type Describes the specimen type needed for testing

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.

Container/Tube: Plastic, 5-mL tube (Supply T465)

Specimen Volume: 5 mL

Collection Instructions:

1. Collect urine for 24 hours.

2. Add 30 mL of toluene as preservative at start of collection or refrigerate specimen during and after collection.

3. Any drug that causes alkalemia or acidemia may be expected to alter citrate excretion and should be avoided, if possible.

4. Mix well before taking 5-mL aliquot.

Additional Information:

1. Patient's age and 24-hour volume are required.

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

 

Urine Preservative Collection Options

Ambient

No

Refrigerated

Yes

Frozen

Yes

6N HCl

No

50% Acetic Acid

No

Na2CO3

No

Toluene

Preferred

6N HNO3

No

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.

1 mL

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

Hemolysis

NA

Lipemia

NA

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
UrineRefrigerated (preferred)7 days
 Frozen 7 days