METHOD AND ARRANGEMENT FOR MAINTAINING VOLUME OF BREATHING GAS IN A DESIRED LEVEL
First Claim
1. A method for maintaining a volume of a breathing gas in a desired level when ventilating a subject, the method comprising:
- supplying the volume of the breathing gas for an inspiration and receiving the volume of the breathing gas for an expiration;
withdrawing a gas sample from the volume of the breathing gas for an analysis;
providing a signal indicative of a volume of the gas sample withdrawn;
determining the volume of the gas sample based on the provided signal indicative of a volume of the gas sample withdrawn; and
controlling a volume of a compensation gas configured to be added into the breathing gas based on the determined volume of the gas sample for maintaining the breathing gas volume in the desired level.
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Accused Products
Abstract
A method for maintaining a volume of a breathing gas in a desired level when ventilating a subject is disclosed herein. The method includes supplying the volume of the breathing gas for an inspiration and receiving the volume of the breathing gas for an expiration and withdrawing a gas sample from the volume of the breathing gas for an analysis. The method also includes providing a signal indicative of a volume of the gas sample withdrawn and determining the volume of the gas sample based on providing the signal. The method further includes controlling a volume of a compensation gas configured to be added into the breathing gas based on determining the volume of the gas sample for maintaining the breathing gas volume in the desired level. A corresponding arrangement for maintaining a volume of a breathing gas in a desired level is also provided.
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Citations
20 Claims
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1. A method for maintaining a volume of a breathing gas in a desired level when ventilating a subject, the method comprising:
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supplying the volume of the breathing gas for an inspiration and receiving the volume of the breathing gas for an expiration; withdrawing a gas sample from the volume of the breathing gas for an analysis; providing a signal indicative of a volume of the gas sample withdrawn; determining the volume of the gas sample based on the provided signal indicative of a volume of the gas sample withdrawn; and controlling a volume of a compensation gas configured to be added into the breathing gas based on the determined volume of the gas sample for maintaining the breathing gas volume in the desired level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A device for maintaining a volume of a breathing gas in a desired level when ventilating a subject comprising:
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a ventilator configured to supply a breathing gas for an inspiration along a first tubing and for receiving a breathing gas for an exhalation along a second tubing; a sample output connector configured to withdraw a gas sample for an analysis from the breathing gas flowing along at least one of the first tubing and the second tubing; a measuring unit configured to provide a signal indicative of a volume of the gas sample withdrawn; a compensation gas inlet configured to add a volume of a compensation gas into the breathing gas; and a processing unit configured to determine the volume of the gas sample based on the signal provided by the measuring unit and configured to control the compensation gas inlet based on the volume of the gas sample withdrawn for maintaining the volume of the breathing gas in the desired level. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method for maintaining a volume of a breathing gas in a desired level when ventilating a subject comprising:
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supplying the volume of the breathing gas for an inspiration and receiving the volume of the breathing gas for an expiration; withdrawing a gas sample from the volume of the breathing gas for the inspiration for an analysis; measuring a volume of the gas sample; providing a signal indicative of the volume of the gas sample withdrawn; determining the volume of the gas sample based on said providing; and controlling a volume of a compensation gas configured to be added into the breathing gas for the inspiration based on said determining the volume of the gas sample for maintaining said breathing gas volume in the desired level.
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Specification