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Test Code FLSO Fluoride, Plasma

Additional Codes

Mayo Test Code: FLSO

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 Plasma

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


Specimen Minimum Volume

Plasma: 1.2 mL

Specimen Stability Information

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

Reference Values

<4.1 mcmol/L

Day(s) Performed

Tuesday

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

Cautions

In solutions below pH 5, hydrogen ion (H[+]) complexes with the fluoride ion, thus reducing the free fluoride ion concentration and giving a falsely low reading.

 

At higher pH (>9), the hydroxyl ion (OH[-]) will interfere with electrodes, giving a falsely elevated reading.

Report Available

2 to 8 days

Specimen Retention Time

14 days

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Method Name

Ion-Selective Electrode (ISE)