Frostbite is primarily a disease of morbidity. Mortality may occur if injured tissue becomes infected or if concurrent hypothermia occurs. Children have a larger body surface area to weight (volume) ratio and therefore are at greater risk for hypothermia than are adults.
Favorable prognostic indicators include the following:
The more superficial the injury, the better
Early sensation to pinprick
Healthy-appearing skin after rewarming
Clear blister more favorable than hemorrhagic blister
Poor prognostic indicators include the following:
Absence of edema
Blebs not extending to tips of phalanges
Persistent mottling/violaceous hue (cyanosis) and anesthesia after rewarming
Frozen appearance of tissue
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Cite this: Richard H. Sinert. Fast Five Quiz: Frostbite and Hypothermia - Medscape - Dec 03, 2020.