The "28 percent" Venturi mask in obstructive airway disease.
D000208:Acute Disease; D000328:Adult; D000368:Aged; D000553:Ambulatory Care; D001784:Blood Gas Analysis; D002245:Carbon Dioxide / Q000097:blood; D005260:Female; D006801:Humans; D000860:Hypoxia / Q000628:therapy*; D008297:Male; D008397:Masks; D008875:Middle Aged; D010100:Oxygen / Q000008:administration & dosage* / Q000097:blood; D012131:Respiratory Insufficiency / Q000628:therapy*; D014692:Ventilation-Perfusion Ratio
D002245:Carbon Dioxide; D010100:Oxygen