Metanephrines, Fractionated, Urine (24 Hour) *

SIM

LAB409

CPT

83835 

Synonyms

Metanephrines, 24 hour Urine; Metanephrines, Quantitative Urine 

Specimen Type

Urine-24 hour 

Container

24 Hour Plastic urine container with no preservative. 
6N HCl preservative is acceptable.  
Obtain urine container from the laboratory.

Collection Instructions

Instruct the patient to void at 8 A.M. and discard the specimen. Then collect all urine including the final specimen voided at the end of the 24 hour collection period (ie, 8 A.M. the next morning) Container must be labeled with patient name, date and time collection started and date and time collection finished. Refrigerate during the collection. Screw lid on securely.

Volume

Volume: 10 mL aliquot 
Min. volume: 2.5 mL aliquot 
These are the volumes sent to Lab Corp. 

Additional Information

Metanephrine and normetanephrine are metabolic products of epinephrine and norepinephrine ,the adrenal medullary hormones.

Patient Preparation

No caffeine before or during the collection. Monamine oxidase inhibitors should be discontinued at least one week prior to beginning collection.

Specimen Processing Instructions

Mix urine well. Measure and aliquot the 24 hour urine. Write the total 24 hour volume on the aliquot container.

Transport Requirements

Room temperature

Specimen Stability

Room temperature :14 days 

Rejection Criteria

Specimen not collected correctly; specimen not refrigerated

Reference Range

Reference range accompanies report

Critical Value

Test Includes

Metanephrine and Normetanephrine 

Methodology

Liquid chromatography/tandem mass spectrometry(LC/MS-MS) 

Testing Frequency

LCA

004234 

Reviewed By

Rhonda Crowe

Reviewed Date

2/27/23

Supplemental

* Denotes  Reference Lab Test