Patent ID: 6634355
Filing Date: 2003-10-21
Classification: A61M

Abstract:
A single breath induction anesthesia apparatus for anesthetizing a patient, comprising:a gas delivery system for delivering at least one gas to said patient from a valve, said valve alternately providing selective gas flow communication between said gas delivery system and one of a first and a second gas flow circuit connected thereto, said first and second gas flow circuits each enabling independent gas flow therethrough; said first gas flow circuit comprising an oxygen supply system for providing oxygen to said patient, said oxygen supply system having a first oxygen inlet connected to a first oxygen source; said second gas flow circuit comprising an oxygen/anesthesia gas supply system for mixing oxygen, independently fed thereto from a second oxygen source without interrupting oxygen flow provided by said oxygen supply system from said first oxygen source to said patient, and at least one anesthesia gas at a preset optimum ratio to provide an oxygen/anesthesia gas mixture, said oxygen/anesthesia gas supply system permitting continuous circulatory flow of said oxygen/anesthesia gas mixture while oxygen from said second oxygen source and said anesthesia gas are additionally supplied thereto to ensure circulation of said oxygen/anesthesia gas mixture at said preset optimum ratio within said oxygen/anesthesia gas supply system sufficient to, when released to said gas delivery system, induce anesthesia of said patient with a single breath; and said valve including a single, flow diverting valve member movable between a first position and a second position, said first position providing gas flow communication between said oxygen supply system and said gas delivery system to deliver oxygen from said first oxygen source to said patient, thereby permitting pre-oxygenation thereof while simultaneously inhibiting gas flow communication between said oxygen/anesthesia gas supply system and said gas delivery system, and said second position providing gas flow communication between said oxygen/anesthesia gas supply system and said gas delivery system to deliver said oxygen/anesthesia gas mixture at said preset optimum ratio to said patient, thereby permitting single breath induction anesthesia of said patient while inhibiting gas flow communication between said oxygen supply system and said gas delivery system.