Surgery – Respiratory method or device – Means for removing substance from respiratory gas
Patent
1998-07-15
1999-11-16
Weiss, John G.
Surgery
Respiratory method or device
Means for removing substance from respiratory gas
12820512, 12820527, 128911, 128914, 55DIG35, 95286, A62B 710, A62B 2302
Patent
active
059838949
ABSTRACT:
A method for providing assisted ventilation which avoids hypoxia and hypocapnia is disclosed, in which a predetermined dead space in an assisted ventilation system is provided external to the patient. The method may also be used to create normocapnia or moderate hypercapnia without causing hypoxia during assisted ventilation. Preferably, hypoxia can be avoided while inducing and/or maintaining the arterial carbon dioxide tension between about 35 and 95 mmHg. Dead space volumes as small as 10 ml and exceeding 150 ml are utilized in the method. An improved proximal terminal, tubular attachments, and coaxial filter are disclosed, which are safer and less expensive to use than prior art unilimb assisted ventilation systems; the devices of the present invention also reduce medical wastes in comparison to prior art assisted ventilation systems. An interface is provided, which incorporates the proximal terminal and other functional devices, to which tubular respiratory conduits of predetermined and/or adjustable dead space volumes can be connected.
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Dorsch, Jerry A., M.D., Dorsch, Susan E., M.D., Understanding Anesthesia Equipment, Chapter 7, The Circle Absorption System, pp. 201-202 and 220-221.
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Fukunaga Atsuo F.
Fukunaga Blanca M.
Medlis Corporation
Weiss John G.
Weiss, Jr. Joseph F.
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