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Test Code TMP Trimethoprim, Serum

Reporting Name

Trimethoprim, S

Useful For

Monitoring trimethoprim therapy to ensure drug absorption, clearance, or compliance

Method Name

Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Serum Red


Specimen Required


Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube: Red top (gel tubes/SST are not acceptable)

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Collection Instructions:

1. Serum for a peak level should be collected at least 60 minutes after a dose.

2. Within 2 hours of collection, centrifuge and aliquot serum into a plastic vial.


Specimen Minimum Volume

0.5 mL

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Red Refrigerated (preferred) 28 days
  Ambient  28 days
  Frozen  28 days

Reference Values

>2.0 mcg/mL (Peak)

Day(s) Performed

Monday, Thursday

CPT Code Information

80299

LOINC Code Information

Test ID Test Order Name Order LOINC Value
TMP Trimethoprim, S 11005-6

 

Result ID Test Result Name Result LOINC Value
80146 Trimethoprim, S 11005-6

Test Classification

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

Report Available

2 to 5 days

Forms

If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.