id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-297840-z5l6vdsr	Río, Francisco García	Air Travel and Respiratory Disease	2007-02-28		.txt	text/plain	16164	949	54	57 In any case, to establish a medical opinion on risk in air travel, the type, reversibility, and degree of functional impairment caused by the disease must be assessed along with the tolerance of the patient for the predicted flight altitude and the length of exposure. Supplementary oxygen is recommended during air travel for patients who have an estimated in-flight PaO 2 of less then 50 mm Hg obtained with prediction equations or, preferably, a hypoxic challenge test ( Figure 6 ). It also seems wise to extend that treatment option to those cases and in which the in-flight cabin pressure corresponds to an altitude of greater than 2438 m (8000 feet) and the patient has very severe COPD (FEV 1 ≤30%), where limitations may be present in the mechanisms of compensation for hypoxemia, or diseases that alter oxygen transport.	./cache/cord-297840-z5l6vdsr.txt	./txt/cord-297840-z5l6vdsr.txt