ALVAN L. BARACH, M.D., F.A.C.P.; NORMAN MOLOMUT, PH.D.
In the preceding paper1 the clinical advantage of breathing oxygen or oxygen-helium mixtures under positive pressure was described. When the head of the patient is placed within a hood that is made leaktight at the neck by a soft sponge rubber collar, positive pressure may be applied to the inner surface of the lung during inspiration and expiration.2 Since the technical management of a hood requires more careful supervision than is ordinarily available, we have added to a mask previously described3 a mechanism which provides positive pressure during the expiratory cycle.
This consists of a series of apertures which are
BARACH AL, MOLOMUT N. AN OXYGEN MASK METERED FOR POSITIVE PRESSURE1. Ann Intern Med. ;17:820–822. doi: 10.7326/0003-4819-17-5-820
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Published: Ann Intern Med. 1942;17(5):820-822.
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