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Dynamic changes in acid base balance during heatstroke in dogs
Pflugers Archiv : European Journal of Physiology
|November 1, 1980
Summary
Dogs exposed to extreme heat developed heatstroke, showing respiratory alkalosis and metabolic acidosis. Their bodies naturally corrected acid-base balance during recovery without intervention.
Area of Science:
- Veterinary Medicine
- Physiology
- Environmental Health
Background:
- Heatstroke is a critical condition caused by prolonged exposure to high temperatures.
- Understanding the physiological responses to heatstroke is crucial for veterinary care and animal welfare.
- This study investigates the acid-base balance and respiratory changes during heatstroke development in dogs.
Observation:
- Dogs were exposed to varying temperature and humidity levels.
- Group C dogs (45°C, 25% RH) developed heatstroke, reaching a peak rectal temperature (Tre) of 44.1°C.
- Significant changes in acid-base balance, including respiratory alkalosis and metabolic acidosis, were observed above Tre of 42°C.
Findings:
- Heatstroke in dogs induced significant acid-base disturbances, progressing from respiratory alkalosis to severe metabolic acidosis.
- Elevated blood lactate and decreased bicarbonate levels correlated with increased Tre.
- Arterial pH dropped to 7.26 at peak Tre and further to 7.17 post-cooling as panting ceased.
Implications:
- The canine body demonstrates a capacity for spontaneous correction of arterial pH following heatstroke.
- These findings highlight the complex physiological response to hyperthermia and the body's compensatory mechanisms.
- Further research can explore therapeutic interventions to support these natural recovery processes.