Method and apparatus for the reuse of anesthetic gases in inhalation anesthesia with specific size and position of CO.sub.2 absorber
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United States of America Patent
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Dec 5, 1995
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app pub date -
Jun 22, 1994
filing date -
May 3, 1990
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Abstract
A method and apparatus for the re-use of anesthetic gases which are not absorbed by a patient, in inhalation anesthesia make use of an adsorption filter during exhalation, the unused anesthetic gases being subsequently desorbed from the adsorption filter during inhalation, and being reintroduced into the respiration flow to the patient. The exhaled gas is supplied through an absorber for carbon dioxide before it is re-supplied to the patient. The apparatus includes a common line for the delivery and discharge of anesthesia and respiration gases to and from a patient. An adsorption filter for adsorption and desorption of anesthetic gases is arranged in this line. To prevent the carbon dioxide from the exhalation gas of the patient, which is adsorbed in the adsorption material, from being re-supplied to the patient in the next inhalation phase, the common line between the patient and the adsorption filter is at least partially divided into an inhalation branch and an exhalation branch, with an absorber for carbon dioxide disposed in the inhalation branch, sized to match the small amount of carbon dioxide left in the reintroduced gas.
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- MAQUET CRITICAL CARE AB;SIEMENS AKTIENGESELLSCHAFT
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Olsson, Sven-Gunnar | Arloev, SE | 22 | 1461 |
Psaros, George | Tullinge, SE | 1 | 50 |
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Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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