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Serum sodium concentrations, osmolality, and potassium concentrations increased rapidly to critical levels.
#A DOGS PURPOSE DROWNING FREE#
Hematocrit and hemoglobin values increased by 30%, but initial plasma free hemoglobin values remained unchanged. By contrast, during cold salt water drowning, average body weight increased by only 6%, with hemoconcentration and a shrinkage of vascular volume. All measured biochemical data (except PaO2) remained at viable levels. Hematocrit values, serum sodium concentrations, and osmolality decreased while serum potassium concentrations, catecholamines, and free hemoglobin increased. During cold fresh water drowning, aspiration produced gross hemodilution with an average increase in body weight of 16.5%. No significant differences were noted in the rate of decrease of temperature between drowning in fresh water and salt water. Electrocardiogram, pneumogram, and rectal temperatures were measured continuously during submersion/immersion.Ĭold water submersion with drowning produced a large initial decrease in carotid artery temperature (approximately 7.5 degrees C in the first 2 mins) compared with a minor decrease (approximately 0.8 degrees C with immersion). The remainder were submerged in cold fresh water or cold salt water (4 degrees C).Ĭatheters were placed in the femoral artery, right carotid artery and right internal jugular vein. Three dogs served as controls and were immersed but not submerged. Thirteen healthy, anesthetized mongrel dogs. Randomized, prospective, controlled submersion experiments in two contrasting cold liquids.Ī laboratory at a large university-affiliated medical institution. To compare the pathophysiologic changes occurring during drowning in cold fresh water and cold salt water with reference to viability.