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Test Code MPHBRB Mephobarbital and Phenobarbital, Serum

Additional Codes

EMR Interface Order Code: 07500

Reporting Name

Mephobarbital and Phenobarbital, S

Useful For

Monitoring of mephobarbital and phenobarbital therapy

Profile Information

Test ID Reporting Name Available Separately Always Performed
MBARS Mephobarbital, S No Yes
PHBRS Phenobarbital, S No Yes

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Serum Red


Specimen Required


Collection Container/Tube: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1.2 mL

Collection Instructions:

1. Draw blood immediately before next scheduled dose.

2. Within 2 hours of collection, the specimen must be centrifuged and the serum aliquoted into a plastic vial.


Specimen Minimum Volume

0.7 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Red Refrigerated (preferred) 14 days
  Ambient  14 days
  Frozen  14 days

Reference Values

MEPHOBARBITAL

Therapeutic range: 1.0-7.0 mcg/mL

Toxic concentration: ≥15.0 mcg/mL

 

PHENOBARBITAL

Therapeutic range

Children: 15.0-30.0 mcg/mL

Adults: 20.0-40.0 mcg/mL

Toxic concentration: ≥60.0 mcg/mL

Day(s) and Time(s) Performed

Wednesday; 12 a.m.

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information

80345

G0480 (if appropriate)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
MEPHS Mephobarbital and Phenobarbital, S In Process

 

Result ID Test Result Name Result LOINC Value
89706 Mephobarbital, S 3750-7
84582 Phenobarbital, S 3948-7

Reject Due To

Gross hemolysis

Reject

Gross lipemia

OK

Gross icterus

OK

Gross hemolysis

Reject

Method Name

Gas Chromatography-Mass Spectrometry (GC-MS)