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Test Code MB MB % Relative Index

Performing Laboratory

MaineGeneral Medical Center

Specimen Requirements

Plasma

Draw blood in a light green-top (lithium heparin) plasma gel tube. For pediatric specimens, draw blood in a green-top (lithium heparin) MICROTAINER(S)®. Label specimen with patient’s name (first and last), date of birth, date and time of draw and phlebotomist’s initials. Spin down and send 1 mL of lithium heparin plasma refrigerated.

 

Specimen stability:

4 hours at room temperature

2 days refrigerated at 2-8°C
 

Minimum volume:

1 mL

 

Specimen rejection criteria:

Hemolyzed specimens are not acceptable.

Day(s) Test Performed

Monday - Sunday

Test Classification and CPT Coding

82553

Reference Values

Normal:  0 - 3.0%

Elevated:  >3.0%