Surgery – Respiratory method or device – Respiratory gas supply means enters nasal passage
Patent
1982-10-01
1985-08-20
Recla, Henry J.
Surgery
Respiratory method or device
Respiratory gas supply means enters nasal passage
12820517, 12820716, A61M 1600
Patent
active
045357676
ABSTRACT:
An apparatus for delivering oxygen to a patient is preferably constructed so as to include an elongted, deformable receptacle having an open side extending along its length, a flexible, "floppy" diaphragm secured at its edge so as to seal off or enclose the open side of the receptacle and a retainer for protecting and for limiting expansion of the diaphragm located along the side of the diaphragm remote from the receptacle. As the apparatus is used, oxygen is constantly delivered to the extremities of the receptacle through appropriate supply lines. On exhalation exhaled gas is forced by the pressure of the breath through a cannula--preferably a nasal cannula--into the interior of the receptacle remote from the supply lines. This cannula is used so that gas can flow. This exhaled gas is used to force the diaphragm against the retainer, opening up the interior of the receptacle in an amount such that some of the exhaled gas will be held in the receptacle. This latter gas will gradually be replaced by the oxygen. On inhalation this mixture will be drawn through the cannula into the body as a consequence of the partial vacuum created during inhalation. This will have the effect of collapsing the diaphragm against the interior of the receptacle so as to substantially close off the interior of the receptacle between the cannula and the supply lines.
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patent: 4120300 (1978-10-01), Tiep
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Otsap Ben A.
Phillips Robert E.
Tiep Brian L.
Boswell K. H.
O'Brian Edward D.
Recla Henry J.
Reichle Karin M.
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