title: Comparison of two oxygen conserving nasal prong systems and the effects of nose and mouth breathing.
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009058:Mouth Breathing; D010102:Oxygen Inhalation Therapy / Q000295:instrumentation*; D012119:Respiration