Anesthesia rebreathing system
OwnerMelvyn L. Henkin, Jordan M. Labyinventors
Life of this patent
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Abstract
A system for administering anesthesia gas and for preventing gas overflow until the patient breathing reservoir is full in order to enhance ease of use, safety, and efficient utilization of anesthesia gas. Overflow from a patient Pop-Off valve is inhibited by an Overflow Blocker valve mounted downstream in series opposition to the patient Pop-Off valve. The Overflow Blocker valve is forced open when the patient bag is full. Thus, until the patient bag is full, the loss of patient exhaled dead space gas and fresh gas is prevented.
Claims12
An anesthesia gas rebreathing system including:
- a patient airway communication device;
- a breathing tube having a first port coupled to said patient airway communication device and a second port configured for coupling to a fresh gas supply;
- a variable volume patient reservoir having an entrance opening coupled to said breathing tube proximate to said breathing tube second port;
- a patient overflow valve having an entrance port coupled to said breathing tube proximate to said first port and configured to permit gas flow from said entrance port to an exit port thereof in response to a positive pressure thereacross;
- an overflow blocker valve having a first port and a second port, and configured to close in response to a positive pressure from said first port to said second port for preventing gas flow therethrough;
- said patient overflow valve exit port coupled to said overflow blocker valve first port;
- and
- sensor means responsive to said patient reservoir filling to a predetermined volume for holding said overflow blocker valve open to permit gas flow from said first to said second port thereof.
In a system for administering anesthesia gas to a patient including a breathing tube for supplying fresh gas to a patient's airway and a variable volume reservoir for alternately (1) storing gas from the patient during exhalation and (2) supplying stored gas to the patient during inhalation, means for controlling gas venting from said breathing tube, said means comprising:
- a first valve coupled to said breathing tube for permitting gas flow therethrough in a first direction out of said breathing tube;
- a second valve coupled in series with said first valve configured to normally prevent gas flow therethrough in said first direction;
- and
- sensor means responsive to said reservoir filling to a predetermined volume for holding said second valve open to permit gas flow therethrough in said first direction.
Dependencies are inferred from the claim text.