Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1997-10-16
1999-12-28
Weiss, John G.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820418, 12820423, 13711516, 137908, A62B 902
Patent
active
060067489
ABSTRACT:
A vent valve apparatus (10) for use with a system for supplying breathable gas pressurised above atmospheric pressure to a human or animal. The apparatus (10) includes a gas washout vent (15), a vent valve (18) adapted to progressively restrict the flow area of the washout vent (15), and a pressure sensitive vent valve control means (20,22,23). The control means is adapted to progressively cause the vent valve (18) to restrict the flow area of the gas washout vent (15) in response to increases in the pressure of the gas supply, thereby substantially regulating the volumetric flow of gas and/or CO.sub.2 gas through the washout vent (15) over a range of gas supply pressures.
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New! Breas PV 100 CPAP First Class Quality and Function. At the right Price; Jul. 4, 1998, pp. 1-2.
PV 101 Bi Level CPAP and PV 102 Bi-Level Time; pp. 1-3.
Prodigy Medical Supplies Co. Ltd.; CPAP.
Puritan Bennett; Companion 318 Nasal CPAP System; May 1993.
Nell
Anderson Charles W.
ResMed Limited
Weiss John G.
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