Medical records of 150 patients with high-altitude pulmonary edema see
n over a 39-month period in a Colorado Rocky Mountain ski area at 2,92
8 m (9,600 ft) (mean age, 34.4 years; 84% male) were reviewed. The mea
n time to the onset of symptoms was 3 +/- 1.3 days after arrival. Comm
on symptoms were dyspnea, cough, headache, chest congestion, nausea, f
ever, and weakness. Orthopnea, hemoptysis, and vomiting were rare, occ
urring in 7%, 6%, and 16%, respectively. Symptoms of cerebral edema oc
curred in 14%. A temperature exceeding 100 degrees F occurred in 20%,
and 17% had a systolic blood pressure of 150 mm of mercury or higher.
Blood pressures were higher in patients older than 50 years (142 mm of
mercury). Rales were present in 85%, and a pulmonary infiltrate was p
resent in 88%; both were most commonly bilateral or on the right side.
The amount of infiltrate was mild. Men appeared to be more susceptibl
e than women to high-altitude pulmonary edema. Pulse oximetry in 45 pa
tients showed a mean oxygen saturation of 74% (38% to 93%). Treatment
methods depended on severity and included a return to quarters for por
table nasal oxygen, an overnight stay in the clinic for continuing oxy
gen, or a descent to Denver for recovery or admission to a hospital. A
ll patients received oxygen for 2 to 4 hours in the clinic. There were
no deaths or complications.