Laboratory Studies
The following studies may be indicated for suspected fluoride toxicity:
- Serum electrolytes
- Hyperkalemia
- Hypocalcemia
- Hypomagnesemia
- Hypoglycemia
- Electrocardiogram and cardiac monitoring
- Effects of hyperkalemia (peaked T waves, widened QRS, bradycardia, atrioventricular [AV] nodal blockade)
- Effects of hypocalcemia (prolonged corrected QT interval [QTc])
- Serum and urine fluoride levels are not available for ED evaluation.
- Perform a Dextrostix evaluation (fingerstick) on all patients with seizure and altered mental status because of the risk for hypoglycemia with systemic fluoride toxicity.
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