Droperidol lowers the shivering threshold in rabbits

Area of Science:

• Anesthesiology
• Pharmacology
• Thermoregulation

Background:

• Perioperative shivering is a common complication of anesthesia.
• Droperidol is primarily used for its sedative and antiemetic properties.
• The effect of droperidol on thermoregulation and shivering threshold is not well-established.

Purpose of the Study:

• To investigate the effects of high and low doses of droperidol on the shivering threshold in rabbits.
• To determine if droperidol can alter thermoregulatory responses during induced hypothermia.

Main Methods:

• Forty-two male rabbits were anesthetized with isoflurane.
• Rabbits were randomly assigned to control, high-dose droperidol, or low-dose droperidol groups.
• Body temperature was reduced, and the shivering threshold was defined as the core temperature at the onset of shivering.

Main Results:

• The shivering threshold was significantly lower in both high-dose (36.7°C ± 1.2°C) and low-dose (36.9°C ± 1.0°C) droperidol groups compared to the control group (38.1°C ± 1.1°C).
• No significant difference in shivering threshold was observed between the high-dose and low-dose droperidol groups.
• P < 0.01 indicated statistical significance.

Conclusions:

• Both high and low doses of droperidol effectively reduce the shivering threshold in rabbits.
• Low-dose droperidol, known for its antiemetic effects, may also help mitigate perioperative shivering.
• Droperidol could be beneficial in reducing shivering during therapeutic hypothermia protocols.