Respiratory Anaesthesia Apparatus with Device for Measuring the Xenon Concentration
1 Assignment
0 Petitions
Accused Products
Abstract
Apparatus for respiratory anaesthesia of a patient by administration of a gas containing gaseous xenon, with a main gas circuit which is open or closed and has an inhalation branch and an exhalation branch, means for supply of gaseous xenon to the inhalation branch of the main circuit, and means for determining the xenon concentration. The means for determining the xenon concentration comprise at least one hot-wire sensor having at least one electrically conducting wire in direct contact with the gaseous flow containing the xenon, calculating means that cooperate with the hot-wire sensor(s) in order to determine the xenon concentration (Xe %) in the flow, means for generating an electrical current in order to generate a current in at least one hot wire, and means for voltage measurement that can measure at least one voltage value at the terminal of at least one hot wire or at least one resistance arranged in series with at least one hot wire. The calculating means cooperate with the voltage measurement means in such a way as to determine the xenon concentration (Xe %).
-
Citations
31 Claims
-
1-10. -10. (canceled)
-
11. An apparatus for the respiratory anesthesia of a patient by administration of a gas containing gaseous xenon comprising:
-
a main gas circuit (CP) in an open or closed circuit having an inhalation branch for leading a gas mixture containing xenon to the patient and an exhalation branch for conveying the gas mixture containing xenon exhaled by the patient; means for supplying gaseous xenon connected to the main circuit for supplying the inhalation branch of the main circuit with a gas containing xenon; means for determining the xenon concentration in order to determine the gaseous xenon content in at least part of the main circuit; wherein said means for determining the xenon concentration comprise; at least one hot-wire(s) sensor having at least one electrically conducting wire, in direct contact with at least part of the gas flow containing xenon; and calculating means cooperating with the hot-wire(s) sensor so as to determine the xenon concentration (Xe %) in said gas flow; means for generating an electric current, capable of and designed for generating an electric current in at least one hot wire of said at least one hot-wire(s) sensor, means for measuring the voltage capable of measuring at least one voltage value (V) at the terminals of at least one hot wire of said at least one hot-wire sensor or at the terminals of at least one resistance arranged in series with at least one hot wire of said at least one hot-wire sensor when said at least one hot wire is in contact with the gas flow and is traversed by an electric current of intensity (I), and in that the calculating means cooperate with the means for measuring voltage so as to determine, from the voltage measurement (V) carried out by said voltage measuring means, the xenon concentration (Xe %) in said flow. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
-
Specification