Surgery – Respiratory method or device – Means for mixing treating agent with respiratory gas
Patent
1992-08-06
1995-05-30
Burr, Edgar S.
Surgery
Respiratory method or device
Means for mixing treating agent with respiratory gas
12820321, 12820325, A61M 1500
Patent
active
054193168
ABSTRACT:
Anesthetic agent positioning and conduit means are provided for anesthesia evaporators to position prepackaged, anesthetic agents, with respect to the anesthesia evaporator and to facilitate movement of the anesthetic agent from its package when so positioned and to conduct the anesthetic agent to a chamber within the evaporator for mixing with carrier gases and passage from the evaporator for anesthesia uses. In one embodiment the anesthetic agent is packaged in a bottle with an externally threaded neck and sealed by a membrane which, upon the bottle being threaded into a well carried by the evaporator, is severed by a spear-headed cutter disposed in the well that enables the anesthetic agent to pass from the bottle to the chamber. Fluid introduction means is provided in a modification to move air into the bottle and facilitate passage of anesthetic agent therefrom. In another embodiment the anesthetic agent is in a rectangular foil wrapped package that is received in a package receiver carried by the evaporator. Piercing members pierce the foil at several locations to permit the anesthetic agent to flow from the package and in one embodiment to also permit air to enter the package to facilitate such flow. A conduct conducts the anesthetic agent to the chamber in the evaporator. In a third embodiment a door is provided to permit entry into the anesthetic agent chamber and the anesthetic agent is in a cryogenically frozen block which when placed in the chamber of the evaporator sublimes on its own due to ambient temperatures or upon application of heat thereabout. In another embodiment the pre-packaged anesthetic agent is disposed at an angle of twenty degrees to the vertical; and in yet another embodiment the pre-packaged anesthetic agent container is connected to the evaporator is a first disposition and then moved to another disposition to permit flow of the anesthetic agent to the evaporator.
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"Drager Vapor 19.3/Vapor 19.2 for precision anesthetic metering independent of flow", Oct. 1984, Dragerwerk Ag Lubeck.
Burr Edgar S.
Furgang Philip
Lewis Aaron J.
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