Effects of intravenous administration of formaldehyde on platelet and coagulation variables in healthy horses.

This research study investigated the effects of administering formaldehyde via intravenous (IV) method on the coagulation and platelet variables of healthy horses. The researchers found that at doses that don’t cause adverse reactions, formaldehyde didn’t show any measurable impact on the horses’ blood coagulation and platelet levels.

Objective and Design of the Study

• The purpose of the research was to evaluate the safety and identify the impacts of intravenous administration of formaldehyde on the hemostatic (relating to the stoppage of bleeding) variables in healthy horses.
• The study involved seven healthy adult horses and employed a 2-way crossover design. In this method, each horse received each treatment in a random order thereby enhancing the reliability of the results as each horse served as its own control.

Methodology

• The research compared clinical signs and results of complete blood count (CBC), serum biochemical analyses, and coagulation tests (including template bleeding time – TBT and activated clotting time – ACT) in horses administered with a dose of 0.37% formaldehyde or lactated Ringer’s solution (LRS) via intravenous injection.
• In a subsequent experiment, a higher dosage of 0.74% formaldehyde or LRS was infused into the horses.
• In a separate experiment, horses were treated with aspirin to impair platelet responses prior to the infusion of formaldehyde or LRS. As aspirin is known to reduce the function of platelets, it helped in studying any additive effects of formaldehyde administration on these already dimmed responses.

Results of the Study

• The study did not detect any significant differences in any variable measured between horses when given formaldehyde or any other treatment. This suggests that formaldehyde, at the tested dosage, does not have a noticeable effect on the hemostatic variables in healthy horses.
• However, higher doses of formaldehyde resulted in adverse effects including muscle fasciculations (uncontrolled muscle twitch), tachycardia (high heart rate), tachypnea (rapid breathing), serous ocular and nasal discharge, agitation, and restlessness.

Conclusions

• The research concluded that intravenous infusion of formaldehyde at doses that do not induce adverse reactions did not have a detectable effect on measured hemostatic variables in healthy horses.
• This provides a basis for potential applications of formaldehyde in treatments requiring its use, mindful of the adverse reactions at higher dosages. However, further research on larger populations might be needed for more definitive conclusions.