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drowning |
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drowning /drown·ing/ (droun´ing) suffocation and death resulting from filling of the lungs with water or other substance. drowning Etymology: ME, drounen asphyxiation caused by submersion in a liquid. See also near drowning. drowning, n asphyxiation because of submersion in a liquid. drowning death from suffocation resulting from aspiration of water or other substance or fluid. Drowning occurs because the liquid prevents breathing. dry-drowning asphyxiation, but with little or no inhalation of water as a result of persistent laryngospasm. near-drowning see near-drowning. secondary drowning pulmonary edema may occur some time after a near-drowning due to loss of surfactant. drowning Public health A mechanism of death that claims 7000 lives/yr–US, comprising 15% of non-MVA deaths; death is by asphyxia due to submersion, with aspiration of fluid; 90% of decedents were hypoxic. See Fresh water drowning, Salt
water drowning, Wet drowning.
Drowning
Fresh water drowning Hypoosmolar water affects the surface tension of alveolar surfactant, causing an imbalance in the V/Q ratio with a collapse of some alveoli, resulting in both true (absolute) and relative intrapulmonary shunting; the
V/Q abnormality is further compromised by pulmonary edema; the shifts of fluids and electrolytes in fresh water drowning result in hemodilution, hemolysis, circulatory overload, and hyponatremia
Salt water drowning Sea water aspiration results in fluid-filled but perfused alveoli, accompanied by a V/Q abnormality due to pulmonary edema; the shifts of fluids and electrolytes in salt water drowning result in hemoconcentration,
CHF, and hypernatremia
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