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22634 Fluoride, Plasma (FL)

Fluoride, Plasma (FL)
Test Code: FLSO
Synonyms/Keywords
​Ref Lab Code: 8641, Fl (Fluoride)
Useful For
​Assessing accidental fluoride ingestion
 
Monitoring patients receiving sodium fluoride for bone disease or patients receiving voriconazole therapy
Specimen Requirements
Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
​Plasma Sodium-heparin Green Top Tube (GTT)​ ​ 3 mL​ 1.5 mL​ ​1.2 mL
Collection Processing Instructions
Centrifuge immediately and transfer plasma to a plastic vial.  Plasma must be separated from cells within 1 hour of draw.  PST is not an acceptable collection tube.
Specimen Stability Information
Specimen Type Temperature Time
Plasma​ Refrigerated (preferred)​ 14 days​
​ Ambient ​ 14 days​
​ Frozen ​ 14 days​
Rejection Criteria
Gross icterus
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Mayo Medical Laboratories​
 Tuesday​
1 day​
Ion-Selective Electrode (ISE)​
Reference Lab
Mayo Clinic Laboratories
Reference Range Information
0.0-4.0 mcmol/L
Interpretation
​Humans exposed to fluoride-treated water typically have plasma fluoride in the range of 1 to 4 mcmol/L. Those who are not drinking fluoride-treated water have plasma fluoride <1 mcmol/L. Plasma fluoride values >4 mcmol/L indicate excessive exposure and are associated with periostitis.
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
82735​ ​ ​ ​ ​
Synonyms/Keywords
​Ref Lab Code: 8641, Fl (Fluoride)
Ordering Applications
Ordering Application Description
​Centricity ​Fluoride, Plasma (FL)
​Cerner None​
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
​Plasma Sodium-heparin Green Top Tube (GTT)​ ​ 3 mL​ 1.5 mL​ ​1.2 mL
Collection Processing
Centrifuge immediately and transfer plasma to a plastic vial.  Plasma must be separated from cells within 1 hour of draw.  PST is not an acceptable collection tube.
Specimen Stability Information
Specimen Type Temperature Time
Plasma​ Refrigerated (preferred)​ 14 days​
​ Ambient ​ 14 days​
​ Frozen ​ 14 days​
Rejection Criteria
Gross icterus
Useful For
​Assessing accidental fluoride ingestion
 
Monitoring patients receiving sodium fluoride for bone disease or patients receiving voriconazole therapy
Reference Range Information
0.0-4.0 mcmol/L
Interpretation
​Humans exposed to fluoride-treated water typically have plasma fluoride in the range of 1 to 4 mcmol/L. Those who are not drinking fluoride-treated water have plasma fluoride <1 mcmol/L. Plasma fluoride values >4 mcmol/L indicate excessive exposure and are associated with periostitis.
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Mayo Medical Laboratories​
 Tuesday​
1 day​
Ion-Selective Electrode (ISE)​
Reference Lab
Mayo Clinic Laboratories
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
82735​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.