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Test Code FLUORIDE Fluoride, Plasma

Reporting Name

Fluoride, P

Useful For

Assessing accidental fluoride ingestion

 

Monitoring patients receiving sodium fluoride for bone disease or patients receiving voriconazole therapy

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Plasma Heparin


Specimen Required


Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube: Green top (sodium heparin)

Submission Container/Tube: Plastic vial

Specimen Volume: 3 mL

Collection Instructions: Centrifuge and aliquot plasma into a plastic vial. Glass tubes are not acceptable.


Specimen Minimum Volume

1.2 mL

Seattle Children's Hospital Note:

Collect 3 - 4 mL whole blood in a Heparin/Green top. Spin down and aliquot plasma.

Specimen Stability Information

Specimen Type Temperature Time Special Container
Plasma Heparin Refrigerated (preferred) 14 days
  Ambient  14 days
  Frozen  14 days

Reference Values

<4.1 mcmol/L

Day(s) Performed

Tuesday

Seattle Children's Hospital Note:

TAT: 3 - 9 days

Note: Samples must be collected before Friday to make the following Tuesday's run. (Samples are not sent to Mayo over the weekend).

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.

CPT Code Information

82735

LOINC Code Information

Test ID Test Order Name Order LOINC Value
FL Fluoride, P 14726-4

 

Result ID Test Result Name Result LOINC Value
8641 Fluoride, P 14726-4

Method Description

The fluoride electrode consists of a single-crystal lanthanum fluoride membrane and an internal reference bonded into an epoxy body. The crystal is an ionic conductor in which only fluoride ions are mobile. When the membrane is in contact with a fluoride solution, potential develops across the membrane. This potential depends on the level of free fluoride ions in solution and is measured against an external constant reference potential with a digital pH/mV meter.(Instruction manual: Fluoride Ion Selective Electrode User Guide. Thermo Scientific; 09/2016)

Report Available

2 to 8 days

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Method Name

Ion-Selective Electrode (ISE)