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George A. Bedon, MD; A. Jay Block, MD; Wilmot C. Ball, Jr., MD

Arch Intern Med. 1970;125(1):106-113.

Abstract
The "28%" Venturi mask is effective in correcting hypoxemia in 60% of patients with acute respiratory failure. Patients with an initial oxygen tension of less than 30 mm Hg are unlikely to achieve adequate oxygenation with this mask delivering 28% oxygen and probably should be treated initially with 35% oxygen. Although mean increases in oxygen tension are fairly constant, the variability from patient to patient is more marked among acutely ill patients and probably results from the variable degree of anatomic right-to-left shunting present. There is little danger of precipitating acute CO₂ narcosis with the 28% Venturi mask, and in the majority of patients it is a satisfactory device for oxygen therapy in acute respiratory failure.

Author Affiliations
Baltimore

From the Department of Medicine, Johns Hopkins University School of Medicine, Baltimore. Dr. Bedon is a Postdoctoral Research Fellow of the Commonwealth Fund.

Footnotes
Received for publication Feb 28, 1969; accepted Aug 11.

Reprint requests to Johns Hopkins Hospital, Baltimore 21205 (Dr. Block).

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