Surgery – Respiratory method or device – Respiratory gas supply means enters mouth or tracheotomy...
Patent
1994-04-28
1996-03-12
Asher, Kimberly L.
Surgery
Respiratory method or device
Respiratory gas supply means enters mouth or tracheotomy...
12820715, 128911, 604 96, 604 99, 604102, A61M 1600, A61M 2900, A62B 902, A62B 906
Patent
active
054977681
ABSTRACT:
A respiration catheter has a sealing cuff (12) which encircles the catheter tube (10) and can be connected through a separate tube (13, 14) with a source of compressed air with a substantially constant pressure. This tube accommodates a cut-off valve (19, 20, 21) which is controlled by the pressure of the respiration air and is adapted to prevent air in the sealing cuff from escaping when this pressure exceeds the pressure in the source of compressed air. The position of this cut-off valve in the vicinity of the free end of the catheter tube obviates the disadvantageous effects of pressure drops in the catheter tube, which may occur when the valve is placed at the injection end of the catheter tube, as is the case in a known respiration catheter.
REFERENCES:
patent: 3709227 (1973-01-01), Hayward
patent: 3769983 (1973-11-01), Merav
patent: 3794036 (1974-02-01), Carroll
patent: 3995643 (1976-12-01), Merav
patent: 4119101 (1978-10-01), Igich
patent: 4791923 (1988-12-01), Shapiro
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