DE4111138A1 - Artificial respiration appts. for patient treatment - passes oxygen from compressed gas source through heat exchanger for heating it, and vaporising chamber filled with ether which has Peltier element as cooling unit - Google Patents

Artificial respiration appts. for patient treatment - passes oxygen from compressed gas source through heat exchanger for heating it, and vaporising chamber filled with ether which has Peltier element as cooling unit

Info

Publication number
DE4111138A1
DE4111138A1 DE4111138A DE4111138A DE4111138A1 DE 4111138 A1 DE4111138 A1 DE 4111138A1 DE 4111138 A DE4111138 A DE 4111138A DE 4111138 A DE4111138 A DE 4111138A DE 4111138 A1 DE4111138 A1 DE 4111138A1
Authority
DE
Germany
Prior art keywords
heat exchanger
peltier element
heating
cooling unit
compressed gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE4111138A
Other languages
German (de)
Inventor
Wolfgang Falb
Karl-Ludwig Dr Gippert
Ulrich Dr Heim
Uvo Dr Hoelscher
Siegfried Dr Kiske
Goetz Kullik
Ralf-Ernst Dr Loeser
Christoph Maurer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Draegerwerk AG and Co KGaA
Original Assignee
Draegerwerk AG and Co KGaA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Draegerwerk AG and Co KGaA filed Critical Draegerwerk AG and Co KGaA
Priority to DE4111138A priority Critical patent/DE4111138A1/en
Publication of DE4111138A1 publication Critical patent/DE4111138A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
    • A61M16/18—Vaporising devices for anaesthetic preparations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0057—Pumps therefor
    • A61M16/0084—Pumps therefor self-reinflatable by elasticity, e.g. resuscitation squeeze bags
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0883—Circuit type
    • A61M16/0891—Closed circuit, e.g. for anaesthesia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0087—Environmental safety or protection means, e.g. preventing explosion
    • A61M16/009—Removing used or expired gases or anaesthetic vapours
    • A61M16/0093—Removing used or expired gases or anaesthetic vapours by adsorption, absorption or filtration
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/208—Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/208—Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
    • A61M16/209—Relief valves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/22—Carbon dioxide-absorbing devices ; Other means for removing carbon dioxide
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/36—General characteristics of the apparatus related to heating or cooling
    • A61M2205/3606—General characteristics of the apparatus related to heating or cooling cooled

Abstract

The Peltier element (23) is connected with its heat radiating surface to the heat exchanger (7). An insulation (26) is provided, which prevents a temp. equalization between the hot and cold surfaces of the Peltier element or the cooling unit (9) and the heat exchanger (7). The heat exchanger (7) is connected in the fresh gas supply line (3) from the compressed gas source, downstream of the vaporising chamber (8). ADVANTAGE - Heating of breathing gas (oxygen) is improved.

Description

Die Erfindung betrifft eine Beatmungsvorrichtung mit einer Atemgasführung durch einen Wärmetauscher zum Anwärmen des Atemgases und durch eine mit Narkosemittel gefüllte Verdunsterkammer, welche ein Peltier-Element als Kühleinrichtung aufweist.The invention relates to a ventilation device a breathing gas through a heat exchanger to Warm up the breathing gas and by using a Anesthetic filled vaporizer, which a Peltier element as a cooling device.

Eine Beatmungsvorrichtung der genannten Art ist aus der US 32 51 361 bekanntgeworden.A respirator of the type mentioned is out the US 32 51 361 become known.

Das von einer Druckgasquelle gelieferte Atemgas wird über eine Frischgaszuführung in einen Atemkreislauf eingespeist, welcher als Komponenten einen Wärmetauscher zum Anwärmen des Atemgases und eine mit Narkosemittel gefüllte Verdunsterkammer zum Dosieren von Narkosemittel in den Atemkreislauf besitzt. Die Verdunsterkammer wird mittels eines Peltier-Elementes derart gekühlt, daß sich in der Narkosemittel-Dampfphase ein bestimmter Sättigungskonzentrationswert einstellt, der einer vorgewählten Konzentrationseinstellung entspricht und maßgebend ist für die Dampfmenge von Narkosemittel, die in den Atemkreislauf dosiert wird.The breathing gas supplied by a compressed gas source becomes via a fresh gas supply into a breathing circuit fed, which as a component Heat exchanger for heating the breathing gas and one with Anesthetic-filled evaporator chamber for dosing of anesthetics in the breathing circuit. The evaporator chamber is operated by means of a Peltier element cooled in such a way that in the Anesthetic vapor phase a certain Saturation concentration value that one Preselected concentration setting corresponds to and is decisive for the amount of steam from anesthetic, which is dosed into the breathing circuit.

Der aus der Verdunsterkammer austretende Narkosemitteldampf wird als Bestandteil des Atemgases über den Wärmetauscher geleitet, wo er von der in der Verdunsterkammer herrschenden Temperatur auf die Atemgastemperatur angewärmt wird. The one leaving the evaporator chamber Anesthetic vapor is used as part of the breathing gas passed over the heat exchanger, where it from the in the Evaporating chamber prevailing temperature on the Breathing gas temperature is warmed.  

Nachteilig bei der bekannten Beatmungsvorrichtung ist, daß die Abwärme des Peltier-Elementes ungenutzt verlorengeht, während gleichzeitig das vom Patienten ausgeatmete Gas dazu verwendet wird, in dem Wärmetauscher den aus der Verdunsterkammer austretenden Narkosemitteldampf auf die Atemgastemperatur anzuwärmen.A disadvantage of the known ventilation device is that the waste heat from the Peltier element is not used is lost while at the same time that of the patient exhaled gas is used in the Heat exchanger from the evaporator chamber escaping anesthetic vapor on the Warm up breathing gas temperature.

Der Erfindung liegt die Aufgabe zugrunde, eine Beatmungsvorrichtung derart zu verbessern, daß die Anwärmung des Atemgases verbessert wird.The invention has for its object a To improve the ventilation device so that the Warming of the breathing gas is improved.

Die Lösung der Aufgabe erfolgt dadurch, daß das Peltier-Element mit seiner wärmeabgebenden Fläche an den Wärmetauscher angeschlossen ist.The problem is solved in that the Peltier element with its heat-emitting surface the heat exchanger is connected.

Der Vorteil der Erfindung besteht im wesentlichen darin, daß die Abwärme des Peltier-Elementes nicht ungenutzt in die Umgebung entweicht, sondern dem Wärmetauscher zugeführt wird, wo sie zur Anwärmung des Atemgases oder des aus der Verdunsterkammer austretenden Narkosemitteldampfes genutzt werden kann.The advantage of the invention is essentially in that the waste heat from the Peltier element is not escapes unused into the environment, but that Heat exchanger is supplied, where it is used to heat the Breathing gas or from the evaporator chamber escaping anesthetic vapor can be used.

Es ist zweckmäßig, den Wärmetauscher in der Frischgaszuführung anzuordnen und damit das in den Atemkreislauf strömende Gas anzuwärmen. Angewärmtes Frischgas kann so bereits beim Eintritt in den Atemkreislauf Atemgasfeuchtigkeit aufnehmen, wodurch die Wasseraufnahmefähigkeit in der Atemgasführung erhöht wird, was sich vorteilhaft für Patienten auswirkt. Da von dem Peltier-Element mehr Wärme abgegeben als Kälte erzeugt wird, ergibt sich insgesamt eine Wärmezufuhr an das Atemgas.It is useful to put the heat exchanger in the Arrange fresh gas supply and thus in the Warm up the breathing gas. Warmed up Fresh gas can thus already when entering the Breathing circuit absorb respiratory gas moisture, which the water absorption capacity in the breathing gas duct is increased, which is beneficial for patients affects. Because of the Peltier element more warmth released when cold is generated, results overall a supply of heat to the breathing gas.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung veranschaulicht und im folgenden näher erläutert. An embodiment of the invention is in the Drawing illustrated and in more detail below explained.  

Es zeigenShow it

Fig. 1 eine Atemgasführung mit einem Wärmetauscher, Fig. 1 is a respiratory gas conduit with a heat exchanger,

Fig. 2 einen an den Wärmetauscher angeschlossenen Narkosemittelverdunster. Fig. 2 is a connected to the heat exchanger Narkosemittelverdunster.

Die in der Fig. 1 gezeigte Beatmungsvorrichtung (1) besitzt eine Atemgasführung mit einem Atemkreislauf (2) und einer Frischgaszuführung (3). Über die Frischgaszuführung (3) gelangt das Atemgas aus einer nicht dargestellten Druckgasquelle über ein Dosierventil (4), eine Durchflußmeßröhre (5), einen Narkosemittelverdunster (6) und einen Wärmetauscher (7) in den Atemkreislauf (2). Der Narkosemittelverdunster (6) besitzt eine Verdunsterkammer (8), die von einer Kühleinrichtung (9) temperiert wird. Innerhalb des Atemkreislaufs (2) fließt das Atemgas längs des Pfeils (10) durch einen Kohlendioxid Absorber (11), ein Inspirationsventil (12) zu einem Patienten (13) und von dort über ein PEEP-Ventil (14), ein Exspirationsventil (15) zu einem Ventilator (16), der in rhythmischen Bewegungen das Atemgas zum Patienten (13) pumpt. Überschüssiges Atemgas kann über ein Ablaßventil (17) abströmen. Der zeitliche Ablauf der Beatmung wird von einer Steuereinheit (18) bestimmt. Die in der Kühleinrichtung (9) freiwerdende Abwärme wird dem Wärmetauscher (7) zugeführt und zur Anwärmung des Frischgases verwendet. Die Temperatur des im Atemkreislauf (2) zirkulierenden Atemgases stellt sich nach einer gewissen Betriebszeit auf etwa 10 Grad unterhalb Körpertemperatur des Patienten (13) ein, da das Atemgas in rhythmischer Folge zwischen dem Balg des Ventilators (16) und dem Patienten (13) zirkuliert. Über die Frischgaszuführung (3) muß mindestens soviel Frischgas in den Atemkreislauf (2) dosiert werden, wie vom Patienten (13) verbraucht wurde. Wird nun der Frischgasstrom wesentlich höher als der Verbrauch eingestellt und das Frischgas direkt aus der Verdunsterkammer (8) in den Atemkreislauf (2) dosiert, kommt es zu einer Auskühlung im Atemkreislauf (2), da aus dem Narkosemittelverdunster (6) abgekühltes Frischgas strömt. Diese Auskühlung, die von dem Patienten (13) als unangenehm empfunden wird, kann kompensiert werden, wenn das Frischgas in der Frischgaszuführung (3) angewärmt und die mittels der Kühlung der Verdunsterkammer (8) entstehende Abwärme mit dem Wärmetauscher (7) dem Frischgas wieder zugeführt wird.The ventilation device ( 1 ) shown in FIG. 1 has a breathing gas guide with a breathing circuit ( 2 ) and a fresh gas supply ( 3 ). Via the fresh gas supply ( 3 ), the breathing gas from a compressed gas source, not shown, passes through a metering valve ( 4 ), a flow measuring tube ( 5 ), an anesthetic evaporator ( 6 ) and a heat exchanger ( 7 ) into the breathing circuit ( 2 ). The anesthetic evaporator ( 6 ) has an evaporator chamber ( 8 ) which is tempered by a cooling device ( 9 ). Within the breathing circuit ( 2 ), the breathing gas flows along the arrow ( 10 ) through a carbon dioxide absorber ( 11 ), an inspiration valve ( 12 ) to a patient ( 13 ) and from there via a PEEP valve ( 14 ), an expiration valve ( 15 ) to a fan ( 16 ) which pumps the breathing gas to the patient ( 13 ) in rhythmic movements. Excess breathing gas can flow out via a drain valve ( 17 ). The timing of ventilation is determined by a control unit ( 18 ). The waste heat released in the cooling device ( 9 ) is fed to the heat exchanger ( 7 ) and used to heat the fresh gas. The temperature of the breathing gas circulating in the breathing circuit ( 2 ) is set after a certain operating time to about 10 degrees below the body temperature of the patient ( 13 ), since the breathing gas circulates in rhythmic sequence between the bellows of the ventilator ( 16 ) and the patient ( 13 ) . At least as much fresh gas must be metered into the breathing circuit ( 2 ) via the fresh gas supply ( 3 ) as was consumed by the patient ( 13 ). If the fresh gas flow is now set significantly higher than the consumption and the fresh gas is metered directly from the evaporator chamber ( 8 ) into the breathing circuit ( 2 ), the breathing circuit ( 2 ) is cooled down because cooled fresh gas flows from the anesthetic evaporator ( 6 ). This cooling, which is perceived by the patient ( 13 ) as unpleasant, can be compensated for when the fresh gas in the fresh gas supply ( 3 ) is warmed up and the waste heat generated by the cooling of the evaporator chamber ( 8 ) is returned to the fresh gas with the heat exchanger ( 7 ) is fed.

Fig. 2 zeigt den in die Kühleinrichtung (9) eingesetzten Narkosemittelverdunster (6) mit dem Wärmetauscher (7). Gleiche Komponenten sind mit gleichen Bezugsziffern der Fig. 1 bezeichnet. Das Frischgas ist mittels eines Anschlußblockes (19) an den Narkosemittelverdunster (6) angeschlossen und wird in der Verdunsterkammer (8) mit Narkosemittel angereichert. Das mit Narkosemittel angereicherte Frischgas gelangt dann über einen Wärmetauscher-Eingang (20) in den Wärmetauscher (7), wo es längs der Strömungspfeile (22) umgelenkt und erwärmt wird. Der Wärmetauscher Ausgang (21) ist mit dem Atemkreislauf (2) verbunden. Die Erwärmung bzw. Kühlung erfolgt mit einem Peltier-Element (23), welches mit seiner kalten Fläche an der Kühleinrichtung (9) und seiner warmen Fläche an dem Wärmetauscher (7) anliegt und in einer Ausnehmung (24) befestigt ist. Die Wärmeübertragung zwischen dem Peltier-Element (23) und der Kühleinrichtung (9) bzw. dem Wärmetauscher (7) erfolgt mittels elastischer Wärmeleitbrücken (25, 25a). Zwischen der Kühleinrichtung (9) und dem Wärmetauscher (7) befindet sich ein Isolator (26), mit dem ein Temperaturausgleich zwischen der warmen und kalten Fläche des Peltier-Elementes (23) bzw. der Kühleinrichtung (9) und dem Wärmetauscher (7) verhindert werden soll. Fig. 2 shows the Narkosemittelverdunster used in the cooling device (9) (6) with the heat exchanger (7). The same components are designated with the same reference numerals in FIG. 1. The fresh gas is connected to the anesthetic evaporator ( 6 ) by means of a connection block ( 19 ) and is enriched with anesthetic in the evaporator chamber ( 8 ). The fresh gas enriched with anesthetic then passes through a heat exchanger inlet ( 20 ) into the heat exchanger ( 7 ), where it is deflected and heated along the flow arrows ( 22 ). The heat exchanger outlet ( 21 ) is connected to the breathing circuit ( 2 ). The heating or cooling takes place with a Peltier element ( 23 ), which rests with its cold surface on the cooling device ( 9 ) and its warm surface on the heat exchanger ( 7 ) and is fastened in a recess ( 24 ). The heat transfer between the Peltier element ( 23 ) and the cooling device ( 9 ) or the heat exchanger ( 7 ) takes place by means of elastic thermal bridges ( 25 , 25 a). Between the cooling device ( 9 ) and the heat exchanger ( 7 ) there is an insulator ( 26 ) with which temperature compensation between the warm and cold surface of the Peltier element ( 23 ) or the cooling device ( 9 ) and the heat exchanger ( 7 ) should be prevented.

Claims (2)

1. Beatmungsvorrichtung mit einer Atemgasführung durch einen Wärmetauscher (7) zum Anwärmen des Atemgases und durch eine mit Narkosemittel gefüllte Verdunsterkammer (8), welche ein Peltier-Element (23) als Kühleinrichtung aufweist, dadurch gekennzeichnet, daß das Peltier-Element (23) mit seiner wärmeabgebenden Fläche an den Wärmetauscher (7) angeschlossen ist.1. Ventilation device with a breathing gas through a heat exchanger ( 7 ) for heating the breathing gas and through an anesthetic filled evaporator chamber ( 8 ), which has a Peltier element ( 23 ) as a cooling device, characterized in that the Peltier element ( 23 ) with its heat-emitting surface is connected to the heat exchanger ( 7 ). 2. Beatmungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Wärmetauscher (7) in der Frischgaszuführung (3) strömungsabwärts der Verdunsterkammer (8) angeschlossen ist.2. Ventilation device according to claim 1, characterized in that the heat exchanger ( 7 ) in the fresh gas supply ( 3 ) is connected downstream of the evaporator chamber ( 8 ).
DE4111138A 1991-04-06 1991-04-06 Artificial respiration appts. for patient treatment - passes oxygen from compressed gas source through heat exchanger for heating it, and vaporising chamber filled with ether which has Peltier element as cooling unit Withdrawn DE4111138A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4111138A DE4111138A1 (en) 1991-04-06 1991-04-06 Artificial respiration appts. for patient treatment - passes oxygen from compressed gas source through heat exchanger for heating it, and vaporising chamber filled with ether which has Peltier element as cooling unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4111138A DE4111138A1 (en) 1991-04-06 1991-04-06 Artificial respiration appts. for patient treatment - passes oxygen from compressed gas source through heat exchanger for heating it, and vaporising chamber filled with ether which has Peltier element as cooling unit

Publications (1)

Publication Number Publication Date
DE4111138A1 true DE4111138A1 (en) 1992-10-08

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DE4111138A Withdrawn DE4111138A1 (en) 1991-04-06 1991-04-06 Artificial respiration appts. for patient treatment - passes oxygen from compressed gas source through heat exchanger for heating it, and vaporising chamber filled with ether which has Peltier element as cooling unit

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DE (1) DE4111138A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0659446A1 (en) * 1993-11-29 1995-06-28 Instrumentarium Oy Anaesthetic vaporiser
WO1996034644A1 (en) * 1995-05-03 1996-11-07 Holger Krohn Method and device for producing respiratory air which is harmless to health in positive pressure nasal breathing apparatus
DE19726110A1 (en) * 1997-06-20 1999-01-21 Draegerwerk Ag Ultrasound misting unit for breathing systems
DE19807682A1 (en) * 1998-02-25 1999-08-26 Kern Storage chamber for inhalation apparatus
WO2001049351A2 (en) * 2000-01-05 2001-07-12 Instrumentarium Corp. Breathing circuit having water vapor removal
EP1638631A1 (en) * 2003-06-10 2006-03-29 Resmed Limited Multiple stage blower and enclosure therefor
DE102005012340B3 (en) * 2005-03-17 2006-05-11 Dräger Medical AG & Co. KG Anesthesia system for supplying anesthetic comprises a respiratory gas source, a gas outlet, an anesthetic vaporizer, a switching unit, a control unit and a monitoring unit to control the switching unit
WO2008145177A1 (en) * 2007-05-29 2008-12-04 Maquet Critical Care Ab Anaesthesia vaporizer module
US8517012B2 (en) 2001-12-10 2013-08-27 Resmed Limited Multiple stage blowers and volutes therefor
US9610416B2 (en) 2009-06-04 2017-04-04 Resmed Limited Flow generator chassis assembly with suspension seal
US11213650B2 (en) * 2016-07-26 2022-01-04 Drägerwerk AG & Co. KGaA Process as well as gas heater for heating a carrier gas stream

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0659446A1 (en) * 1993-11-29 1995-06-28 Instrumentarium Oy Anaesthetic vaporiser
US5605146A (en) * 1993-11-29 1997-02-25 Instrumentarium Oy Method and an arrangement in connection with vaporizing an anaesthetic
WO1996034644A1 (en) * 1995-05-03 1996-11-07 Holger Krohn Method and device for producing respiratory air which is harmless to health in positive pressure nasal breathing apparatus
DE19515739A1 (en) * 1995-05-03 1996-11-07 Holger Krohn Method and device for generating health-friendly breathing air in nasal positive pressure respirators
DE19726110A1 (en) * 1997-06-20 1999-01-21 Draegerwerk Ag Ultrasound misting unit for breathing systems
DE19726110C2 (en) * 1997-06-20 1999-07-22 Draegerwerk Ag Aerosol generator for ventilation systems
DE19807682A1 (en) * 1998-02-25 1999-08-26 Kern Storage chamber for inhalation apparatus
DE19807682C2 (en) * 1998-02-25 2000-03-09 Stefan Kern Inhalation device
US6523538B1 (en) 2000-01-05 2003-02-25 Instrumentarium Corp. Breathing circuit having improved water vapor removal
WO2001049351A2 (en) * 2000-01-05 2001-07-12 Instrumentarium Corp. Breathing circuit having water vapor removal
WO2001049351A3 (en) * 2000-01-05 2001-12-27 Instrumentarium Corp Breathing circuit having water vapor removal
US9427538B2 (en) 2001-12-10 2016-08-30 Resmed Limited Multiple stage blowers and volutes therefor
US10434271B2 (en) 2001-12-10 2019-10-08 ResMed Pty Ltd Multiple stage blowers and volutes therefor
US10300231B2 (en) 2001-12-10 2019-05-28 Resmed Limited Multiple stage blowers and volutes therefor
US8517012B2 (en) 2001-12-10 2013-08-27 Resmed Limited Multiple stage blowers and volutes therefor
EP1638631A1 (en) * 2003-06-10 2006-03-29 Resmed Limited Multiple stage blower and enclosure therefor
EP1638631A4 (en) * 2003-06-10 2011-07-20 Resmed Ltd Multiple stage blower and enclosure therefor
DE102005012340B3 (en) * 2005-03-17 2006-05-11 Dräger Medical AG & Co. KG Anesthesia system for supplying anesthetic comprises a respiratory gas source, a gas outlet, an anesthetic vaporizer, a switching unit, a control unit and a monitoring unit to control the switching unit
US7726307B2 (en) 2005-03-17 2010-06-01 Dräger Medical AG & Co. KG Anesthesia system with a anesthetic evaporator
WO2008145177A1 (en) * 2007-05-29 2008-12-04 Maquet Critical Care Ab Anaesthesia vaporizer module
US9610416B2 (en) 2009-06-04 2017-04-04 Resmed Limited Flow generator chassis assembly with suspension seal
US11129948B2 (en) 2009-06-04 2021-09-28 ResMed Pty Ltd Flow generator chassis assembly with suspension seal
US11213650B2 (en) * 2016-07-26 2022-01-04 Drägerwerk AG & Co. KGaA Process as well as gas heater for heating a carrier gas stream

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