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TEST ID U24CAT CATECHOLAMINES, 24 HOUR URINE

Important Note

ORDERING GUIDANCE

This test is not a first-line test for pheochromocytoma. Recommended tests for that purpose include:

-PMET / Metanephrines, Fractionated, Free, Plasma

-METAF / Metanephrines, Fractionated, 24 Hour, Urine

 

 

Factors interfering with accuracy of 24hr urine collection:

Failure to collect all urine excreted during the 24 hr time frame.

Going beyond the  24 hr collection period and collecting excess urine.

Losing urine from specimen container through spilling.

Failure to keep urine cold during collection period.

Additional Codes

4326

CPL Lab Link

Performing Laboratory

NRLS-CPL Lab

Specimen Type

24 Hour Urine

Specimen Required

Container/Tube:
Preferred: 24 hour urine container, no preservative.
Specimen Volume: Entire collection

Collection Instructions:

To start the 24-hour collection, the patient voids, discards specimen, and notes the date and time on label. *Note:  24 hour urine tests must begin on an empty bladder. All urine for the following 24-hour period is added to the container. Urine must be kept on ice or in a refrigerator.

 Exactly 24  hours from the start time, the patient voids again, adding the specimen to the container, and the date and time is recorded as the end of collection. 

Lab Processing Instructions:

Transfer 10 mL from a well-mixed 24-hour collection to a standard transport tube. Refrigerate. 

Record total volume and collection time interval on transport tube.

Specimen Minimum Volume

Full Collection- 3.0 ml in aliquot from a well-mixed 24 hr collection

Specimen Stability Information

Specimen Type Temperature Time
Urine Refrigerated(preferred) 1 week
  Frozen Undefined

 

Reference Values

An interpretive report will be provided