Answer:
In case of suspected fluoride poisoning, no fluoride preservative should be added to the blood sample taken, but an anticoagulant-preservative such as sodium citrate can be used.
Explanation:
Option for this question:
A. Sodium fluoride
B. Sodium citrate
C. Potassium oxalate
D. Heparin
Sodium or potassium fluoride is an enzyme inhibitor used as a preservative of body fluids, such as blood. Its action on the cell prevents any changes that may alter the toxicological studies of a sample.
In forensic medicine, potassium fluoride -in addition to an anticoagulant- is placed in the vial where a sample is collected, to preserve its characteristics and to obtain as much toxicological data as possible.
The only exception to the use of potassium fluoride as a preservative is when there is suspicion of sodium poisoning, in which case a molecule with anticoagulant and preservative properties, such as sodium citrate, is used.
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