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Regenerative anaesthetic agent reflector and carbon dioxide absorber

IP.com Disclosure Number: IPCOM000018247D
Original Publication Date: 2002-Apr-01
Included in the Prior Art Database: 2003-Jul-23
Document File: 1 page(s) / 177K

Publishing Venue

Siemens

Related People

Mario Loncar: AUTHOR

Abstract

Background It is known to provide a combined anaesthetic agent reflector and carbon dioxide (CO2) absorber in a single unit. Internal gas flow paths of this unit are arranged so that during an expiration phase expira- tion gas passes only through the reflector material and during an inspiration phase inspiration gas passes through both the reflector and the absorber. In this manner any CO2 from the expiration gas that remains within the unit’s deadspace is not re- circulated to the patient. The deadspace is relatively small, < 100ml, so that the known unit employs only a small amount of soda lime which needs to be re- placed frequently. Usually the entire unit is disposed of when the soda lime becomes saturated with CO2.

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Gesundheit

Regenerative anaesthetic agent re-flector and carbon dioxide absorber

Idee: Mario Loncar, S-Solna

Background

It is known to provide a combined anaesthetic agentreflector� and carbon dioxide (CO2) absorber in asingle unit. Internal gas flow paths of this unit arearranged so that during an expiration phase expira-tion gas passes only through the reflector materialand during� an� inspiration� phase� inspiration� gaspasses through both the reflector and the absorber. Inthis manner any CO2 from the expiration gas thatremains� within� the� unit’s� deadspace� is� not� re-circulated to the patient. The deadspace is relativelysmall, < 100ml, so that the known unit employs onlya small amount of soda lime which needs to be re-placed frequently. Usually the entire unit is disposedof when the soda lime becomes saturated with CO2.

path for warm gas through used units for regenera-tion purposes.

Two possible arrangements for regenerating the unitare shown in figures 2 below.

Air(100-200)� o C

Atmosphere

EVAC Reflector

RegenerativeCO2

Absorber

( A )

RegenerativeCO2

Absorber

Air(100-200)� o C

Air(100-200)� o C

Reflector

EVAC

( B )

Invention

Regenerative CO 2� scrubbers are known, for examplefrom US 2001/0004895 A1, in which a CO 2� absorb-ing material, such as an ion exchange resin impreg-nated� with� benzylamine� groups,� is regenerated byapplying steam or simply increasing the temperatureof the absorber. It is proposed that the soda lime ofthe known unit is replaced with a� re...