Surgery – Respiratory method or device – Means for mixing treating agent with respiratory gas
Patent
1995-10-19
1996-08-20
Lewis, Aaron J.
Surgery
Respiratory method or device
Means for mixing treating agent with respiratory gas
12820314, 12820324, 12820325, A61M 1500
Patent
active
055469310
ABSTRACT:
A carrier gas source is connected to the breathing system of a patient by a carrier-gas conduit. A positive displacement gas pump has an outlet connected to a distal port in the carrier-gas conduit. A pump gas-supply conduit, includes a vaporizer chamber and an ambient-referenced pressure regulator which has an output orifice connected indirectly to the positive displacement pump inlet. In one kind of anesthetic-vapor delivery apparatus, for use with high boiling anesthetic agents, the pump gas-supply conduit has an input end connected to a proximal port in the carrier-gas conduit. In another kind of anesthetic-vapor delivery apparatus, for use with lower temperature anesthetic agents there is no proximal port. In both kinds of anesthetic-vapor delivery apparatus, the ambient-referenced regulator controls the pressure at the pump inlet to a narrow range of pressures just below ambient atmospheric pressure. A microprocessor may control the speed of the positive displacement pump for delivery of anesthetic at a chosen and accurately controlled rate. These anesthetic-vapor delivery apparatuses hold the anesthetic-vapor pressure at the inlet of the positive displacement pump to just below the ambient pressure in which the apparatus is being employed, and consequently hold constant the vapor pressure of anesthetic agent being delivered to the patient regardless of the ambient pressure and in spite of variations in the carrier gas pressure attributable to the patient's breathing system.
REFERENCES:
patent: 4442856 (1984-04-01), Betz
patent: 4770168 (1988-09-01), Rusz et al.
patent: 5146915 (1992-09-01), Montgomery
patent: 5168866 (1992-12-01), Montgomery
patent: 5197462 (1993-03-01), Falb et al.
patent: 5390665 (1995-02-01), Leach
patent: 5411019 (1995-05-01), Smith
Hooks Arthur K.
Lewis Aaron J.
LandOfFree
Anesthetic-vapor delivery apparatus with an ambient-referenced p does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Anesthetic-vapor delivery apparatus with an ambient-referenced p, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anesthetic-vapor delivery apparatus with an ambient-referenced p will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2323559