Apparatus and techniques for reducing the effects of general...

Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure

Reexamination Certificate

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C128S200260, C128S203120

Reexamination Certificate

active

10680469

ABSTRACT:
An apparatus for reversing inhaled anesthesia, which is configured to be positioned along a breathing circuit or anesthesia delivery circuit, includes a filter for removing one or more anesthetic agents from gases passing therethrough, as well as a component for elevating CO2levels in gases that are to be inhaled by an individual. The apparatus is configured to be positioned between a Y-connector of the breathing circuit and the portion of the breathing circuit that interfaces with the individual. The CO2level-elevating component facilitates an increase in the ventilation of the individual without resulting in a significant decrease in the individual's PaCO2level and, thus, a decrease in the rate at which blood flows through the individual's brain. A method of reversing the effects of inhaled anesthesia includes increasing the rate of ventilation of an anesthetized individual while causing the individual to inhale gases with elevated amounts of CO2and while filtering anesthetic agents from such gases.

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patent: 1 222 940 (2002-07-01), None
Dr. Q. Milner, Anaesthetic Breathing Systems, www.nda.ox.ac.uk/wfsa/html/u07—012.htm.
International Search Report, Jul. 21, 2004 (4 pages).
Written Opinion of the International Searching Authority, Jul. 21, 2004 (6 pages).

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