Noninvasive Positive Pressure Ventilation Using Helium:Oxygen Versus Air:Oxygen in Acute Respiratory Failure in Chronic Obstructive Pulmonary Disease Patients Exposed to Sulfur Mustard
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Ages Eligible for Study:
38 Years to 59 Years (Adult)
Sexes Eligible for Study:
a history of previous exposure to sulfur mustard
worsening dyspnea during the last 10 days
respiratory rate >25/min
PaCO2 of >50 mmHg
PaO2 of <50 mmHg
recent pneumothorax (<1 month)
severe respiratory failure or hemodynamic instability with forthcoming intubation
FIO2 of <0.4
impaired consciousness or absence of patient cooperation