Experimental study on the pathogenesis of heat stroke

Area of Science:

• Physiology
• Environmental Health

Background:

• Heat stroke is a severe condition resulting from prolonged exposure to high ambient temperatures.
• Understanding the physiological mechanisms and potential treatments for heat stroke is crucial for public health.

Purpose of the Study:

• To investigate the physiological changes associated with heat stroke in rabbits exposed to high ambient temperatures.
• To evaluate the efficacy of glycerol as a potential therapeutic agent for heat stroke.

Main Methods:

• Conscious rabbits were exposed to ambient temperatures ranging from 8 to 40 degrees C.
• Physiological parameters including rectal temperature, blood pressure, intracranial pressure, and cerebral water content were monitored.
• The effect of intravenous glycerol infusion on survival time was assessed.

Main Results:

• Exposure to 40 degrees C induced heat stroke with a latency of approximately 87 minutes.
• Heat stroke onset was characterized by hyperthermia, increased intracranial pressure (ICP), elevated cerebral water content, and decreased mean arterial blood pressure (MABP) and cerebral perfusion pressure (CPP).
• Glycerol treatment significantly prolonged survival time in heat-stroked animals.

Conclusions:

• Heat stroke involves complex physiological disruptions including hyperthermia, cerebral edema, intracranial hypertension, and compromised cerebral perfusion.
• Glycerol demonstrates therapeutic potential in mitigating heat stroke by reducing cerebral edema, intracranial pressure, and body temperature.