A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 16/00 (2006.01) A61M 16/04 (2006.01) A62B 7/00 (2006.01) A61M 25/00 (2006.01) A61M 25/01 (2006.01)
Patent
CA 2176055
A device (10, 80 or 120) for creating a sub-atmospheric pressure near the carina (12) of a human or veterinary patient (48) includes a channel (28) or perforation (92 or 132) for the passage of an oxygen-containing gas therethrough, the channel (28) or perforation (92 or 132) being open in a direction distal of the patient, so as to establish a zone (30, 94 or 142) of sub- atmospheric pressure by reverse venturi effect during patient exhalation. The sub-atmospheric pressure in the zone (30, 94 or 142) facilitates removal of carbon dioxide from the lungs (54) of the patient and permits intratracheal and/or intratracheal pulmonary ventilation to be performed at pressures less than those conventionally required for such ventilation. The device (10, 80 or 120) of the present invention is also advantageous in obviating the risks inherent in prior reverse venturi devices, specifically, the possibility of detachment of a tubular member in those devices, and the possible complications of surgical recovery of the tubular member from the bronchi (52) or lungs (54) of the patient (48). The device (10, 80 or 120) of the present invention achieves this latter advantage either by eliminating the tubular member of prior reverse venturi devices, or by providing a shoulder (130) affirmatively preventing distal movement and loss of it.
Cook Incorporated
Kirby Eades Gale Baker
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