Find Locations
For hours, walk-ins and appointments.Synonyms
- F, Urine
- Sodium Fluoride
Test Includes
Creatinine, urine; fluoride, urine; fluoride:creatinine ratio
Special Instructions
Do not use preservative. Preservatives used for routine analysis may contain mercuric oxide (ie, Stabilur), which interferes with all metal testing. If both urinalysis and metal testing are ordered, please submit a separate urine specimen (containing no additive) for the metal testing.
Expected Turnaround Time
3 - 5 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Related Information
Specimen Requirements
Specimen
Urine (random)
Volume
5 mL
Minimum Volume
2.2 mL
Container
Plastic urine container, no preservative. Do not use glass container.
Collection
Sampling time is prior to shift or end of shift for industrial monitoring. Inorganic analytes with timing “end of shift” (meaning the last two hours of exposure) or “prior to next shift” are eliminated rapidly with a half-life less than five hours. Such analytes do not accumulate in the body and, therefore, their timing is critical only in relation to the exposure and postexposure periods.
Storage Instructions
Maintain specimen at room temperature.
Causes for Rejection
Specimen received in a glass container.
Test Details
Use
Monitor chronic exposure to fluoride
Methodology
Ion-selective electrode (ISE) potentiometry
Reference Interval
• Environmental exposure: 0.2−3.2 mg/L
• Occupational exposure: BEI® (sampling time is prior to shift): 3.00 mg/g creatinine;1 BEI® (sampling time is end of the shift): 10.00 mg/g creatinine1
Additional Information
BEI® are reference values intended as guidelines for evaluation of occupational exposure. BEI® represent biological levels of chemicals that correspond to workers with inhalation exposure equivalent to the threshold limit value (TLV®) of the chemicals. TLVs refer to the airborne concentrations of substances and represent conditions under which it is believed that nearly all workers may be repeatedly exposed, day after day, without adverse health effects.1
Footnotes
1. TLVs and BEIs, Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices 2004, American Conference of Governmental Industrial Hygienists (ACGIH).
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 070052 | Fluoride, Urine | 5650-7 | 070053 | Fluoride, Urine | mg/L | 5650-7 |
| 070052 | Fluoride, Urine | 5650-7 | 723280 | Creatinine(Crt),U | g/L | 2161-8 |
| 070052 | Fluoride, Urine | 5650-7 | 070056 | Fluoride/Crt Ratio | mg/g creat | 13475-9 |
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The LOINC® codes are copyright © 1994-2021, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf