Chuan, P S Oxygen administration by ventimask in patients with respiratory failure. [electronic resource] - Singapore medical journal Sep 1969 - 178-81 p. digital Publication Type: Journal Article ISSN: 0037-5675 Subjects--Topical Terms: Carbon Dioxide--bloodHumansHydrogen-Ion ConcentrationOxygen--administration & dosageOxygen Inhalation TherapyRespiratory Insufficiency--therapy