Altitude Sickness Flashcards
Altitude sickness is common with a rapid descent over….
8200 ft
High altitude is considered between what elevations
5000-11500 ft
Very high altitude is considered what elevations
11500-18000
Maximum O2 sats at very high altitude =
< 90
Extreme altitude above…
> 18000 ft
High altitude pathophysiology causes hyperventilation due to…
decreased FiO2
Hyperventilation leads to what metabolic state
Alkalosis
Hypoxia causes vasodilation leading to increased cerebral blood flow which causes…
Cerebral edema
Hypoxia causes increased capillary permeability which leads to…
Pulmonary edema
Hypoxia causes increased capillary permeability leading to peripheral edema which increases…
cold injury risk (frostbite)
Signs and symptoms of mild acute mountain sickness
Headache Malaise Anorexia N/V Dizziness Dyspnea Dry cough Decreased urine output
Any AMS symptoms are due to altitude until…
proven otherwise
HACE signs and symptoms
High altitude cerebral edema Headache Stupor Seizure Ataxia Focal deficits
HAPE
High altitude pulmonary edema Dyspnea at rest Fatigue, weakness Ortho piña Hemoptysis Cyanosis Rales
Treatment for HAPE
Descend immediately Minimize exertion Oxygen CPAP Hyperbaric chamber Steroids Avoid Lasix or MS
Treatment for HACE
Descend immediately
Steroids
Hyperbaric chamber
