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A New Mask for Delivering Controlled Low-Concentration Oxygen

E. Leslie Chusid, MD; Albert Miller, MD; Teresita G. Samortin, MD; Eileen E. Daly

JAMA. 1970;214(5):889-893.

Abstract
A simple, inexpensive, disposable plastic mask for controlled low-concentration oxygen inhalation has been developed. An inspired oxygen concentration of about 24% is obtained with an oxygen flow rate of 1.5 to 2 liter/min through a Venturi device, with negligible rebreathing of carbon dioxide (mean FICO₂, 0.7%) under the mask. In 68 patients the mask raised the arterial oxygen tension by a mean of 34 mm Hg, whatever the clinical diagnosis or initial Pao₂. The mean rise in Paco₂, in patients with hypercapnia, eucapnia, or hypocapnia did not exceed 3 mm Hg during low oxygen inhalation with the new mask. The mask is an economical and well-tolerated method of short- or long-term low oxygen therapy in patients with hypoxemia of varied causes.

Author Affiliations
From the Pulmonary Laboratory, Department of Medicine, Mount Sinai Hospital Services—City Hospital Center at Elmhurst, New York.

Footnotes
Reprint requests to 79-01 Broadway, Elmhurst, NY 11373 (Dr. Chusid).

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