[Skip to Content]
Sign In
Individual Sign In
Create an Account
Institutional Sign In
OpenAthens Shibboleth
Purchase Options:
[Skip to Content Landing]
November 6, 1967

A Constant Ratio Air-Oxygen Mixer

Author Affiliations

From the Harvard Medical School, Department of Surgery, at the Peter Bent Brigham Hospital, Boston, and the Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Mass.

JAMA. 1967;202(6):531-534. doi:10.1001/jama.1967.03130190137021

A new device has been developed which delivers regulated oxygen mixtures for use in respiratory therapy. The device is simple and compact for use at the bedside, and is compatible with all respirators and other gas delivery techniques. A single manual control allows selection of 100% oxygen or either of two intermediate mixture ratios. These mixtures are constant with changing ventilatory rates, and the system requires no monitoring or metering of the input gases.

Fairley, H.B., and Britt, B.A.:  The Adequacy of the Air-Mix Control in Ventilators Operated From an Oxygen Source ,  Canad Med Assoc J 90:1394-1396 ( (June 20) ) 1964.
Bosomworth, P.P., and Spencer, F.C.:  Prolonged Mechanical Ventilation: I. Factors Affecting Delivered Oxygen Concentrations and Relative Humidity ,  Amer Surg 31:377-381 ( (June) ) 1965.
Balentine, J.D.:  Pathologic Effects of Exposure to High Oxygen Tensions: A Review ,  New Eng J Med 275:1038-1040 ( (Nov 10) ) 1966.Crossref
Nash, G.; Blennerhassett, J.B.; and Pontoppidan, H.:  Pulmonary Lesions Associated With Oxygen Therapy and Artificial Ventilation ,  New Eng J Med 276:268-274 ( (Feb 16) ) 1967.Crossref
Pontoppidan, H., and Berry, P.R.:  Regulation of the Inspired Oxygen Concentration During Artificial Ventilation ,  JAMA 201: 11-14 ( (July 3) ) 1967.Crossref
Welch, B.E.; Morgan, T.E.; and Clamann, H.G.:  Time-Concentration Effects in Relation to Oxygen Toxicity in Man ,  Fed Proc 22:1053-1056 ( (July) -Aug) 1963.