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DE2365725B2 - Pressure limiting device, in particular for anesthesia machines - Google Patents
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DE2365725B2 - Pressure limiting device, in particular for anesthesia machines - Google Patents

Pressure limiting device, in particular for anesthesia machines

Info

Publication number
DE2365725B2
DE2365725B2 DE2365725A DE2365725A DE2365725B2 DE 2365725 B2 DE2365725 B2 DE 2365725B2 DE 2365725 A DE2365725 A DE 2365725A DE 2365725 A DE2365725 A DE 2365725A DE 2365725 B2 DE2365725 B2 DE 2365725B2
Authority
DE
Germany
Prior art keywords
elastic
hose
limiting device
pressure limiting
inner tube
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.)
Granted
Application number
DE2365725A
Other languages
German (de)
Other versions
DE2365725A1 (en
DE2365725C3 (en
Inventor
Melvyn Lane Tarzana Calif. Henkin (V.St.A.)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of DE2365725A1 publication Critical patent/DE2365725A1/en
Publication of DE2365725B2 publication Critical patent/DE2365725B2/en
Application granted granted Critical
Publication of DE2365725C3 publication Critical patent/DE2365725C3/en
Expired 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. ventilators; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/104—Preparation of respiratory gases or vapours specially adapted for anaesthetics
    • 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. ventilators; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816—Joints or connectors
    • A61M16/0833—T- or Y-type connectors, e.g. Y-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/04—Devices damping pulsations or vibrations in fluids
    • 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. ventilators; Tracheal tubes
    • A61M16/0057—Pumps therefor
    • A61M16/0078—Breathing bags
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S128/00—Surgery
    • Y10S128/909—Breathing apparatus with means for preventing patient cross-contamination

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Veterinary Medicine (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Gas Separation By Absorption (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Fluid-Driven Valves (AREA)
  • Invalid Beds And Related Equipment (AREA)
  • Treating Waste Gases (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Description

Die Erfindung betrifft eine Druckbegrenzungseinrichtung, insbesondere für Anästhesiegeräte, nach dem Oberbegriff des Hauptanspruchs.The invention relates to a pressure limiting device, in particular for anesthesia equipment, according to the Preamble to the main claim.

Druckbegrenzur ^einrichtungen dieser Art sind beispielsweise aus dem Deutschen Gebrauchsmuster 17 98 514, der Deutschen Auslegeschrift 10 9(5 694, der US-Patentschrift 28 75 787 sow«; der US-Patentschrift 30 20 928 bekannt In verschiedenen Variationen wird hier beschrieben, wie eine Druckbegrenzungseinrichtung für unter Druck stehendes Strömungsmittel dadurch gebildet werden kann, daß eine Einlaßkammer zwischen einem elastischen Schlauch und einem mit einer öffnung versehenen Abschnitt eines inneren, das Strömungsmittel führenden Schlauches vorgesehen wird. Die beiden Enden des elastischen Schlauches sind dabei strömungsmitteldicht mit der Außenseite des inneren Rohres verbunden.Pressure limiters of this type are, for example, from the German utility model 17 98 514, the German Auslegeschrift 10 9 (5 694, the US patent 28 75 787 sow "; the US patent 30 20 928 known In different variations is described here how a pressure limiting device for pressurized fluid can be formed in that an inlet chamber between an elastic tube and an opening provided with a portion of an inner, the Fluid leading hose is provided. The two ends of the elastic tube are connected to the outside of the inner tube in a fluid-tight manner.

Übliche Anästhesiegeräte weisen eine Versorgungseinheit auf, die ein zur Narkose verwendetes Luftgemisch aus Sauerstoff und Narkosegas erzeugt. In der Regel wird das vom Patienten wieder ausgeatmete, teilweise verbrauchte Luftgemisch beim Ausatmen in einem Atembeutel aufgefangen, durch von der Versorgungseinheit abgegebenes Gasgemisch wieder aufbereitet und dann erneut zum Einatmen bereitgestellt. Der Atembeutel ist im allgemeinen aus elastischem Gummi gefertigt. Um die Übertragung von Krankheitserregern von einem Patienten zum anderen Patienten zu vermeiden, werden auch Atembeutel aus billigem Material, insbesondere Plastikmaterial, als Wegwerfteile verwendet. Derartige Atembeutel können plötzlich auftretende Druckschwankungen in den mit der Atemmaske verbundenen Arbeitsleitungen des Anästhesiegerätes, die zu einer Beschädigung der Lunge des Patienten führen können, praktisch nicht auffangen, da ihr maximales Volumen vorgegeben ist. Auch elastische Atembeutel können einen Druckanstieg nur in begrenztem Maße unter elastischer Aufweitung der Außenhaut mindern.Usual anesthesia devices have a supply unit that contains an air mixture used for anesthesia generated from oxygen and anesthetic gas. As a rule, what is exhaled by the patient, Partly used air mixture is collected in a breathing bag during exhalation by the supply unit released gas mixture is processed again and then made available again for inhalation. Of the Breathing bag is generally made of elastic rubber. To the transmission of pathogens To avoid going from one patient to another patient, breathing bags are also made from cheap Material, especially plastic material, used as disposable parts. Such breathing bags can suddenly Pressure fluctuations that occur in the working lines of the anesthesia machine connected to the breathing mask, which can lead to damage to the patient's lungs, practically do not absorb because its maximum volume is given. Even elastic breathing bags can only cause a limited increase in pressure Reduce dimensions with elastic expansion of the outer skin.

Bei geschlossenem Kreislauf ist es in Anästhesiegeräten allgemein üblich, ein Überdruckventil vorzusehen, beispielsweise eines der eingangs genannten Art, wie es aus der US-PS 20 38 267 bekannt ist Hier ist es direkt an der Atemmaske angeordnet und besitzt eine Einlaßkammer, die von einer Drosseleinrichtung abgesperrt wird. Die Drosseleinrichtung ist ein vom Strömungsmittel beaufschlagtes, federnd in eine geschlossene Stellung vorgespanntes elastisches Formteil, das an einer steifen ίο Wand der Einlaßkammer anliegt Dieses bekannte Ventil öffnet bei einem bestimmten Überdruck, kann aber die fehlende Elastizität eines Kunststoffatembeutels nicht ausgleichen.When the circuit is closed, it is in anesthesia machines It is common practice to provide a pressure relief valve, for example one of the type mentioned at the outset, such as from US-PS 20 38 267 is known Here it is arranged directly on the breathing mask and has an inlet chamber, which is shut off by a throttle device. The throttle device is one of the fluid applied, resiliently pretensioned in a closed position, elastic molded part, which is attached to a rigid ίο The wall of the inlet chamber is in contact. This known valve opens at a certain overpressure, can but cannot compensate for the lack of elasticity in a plastic breathing bag.

Dasselbe gilt für das aus der US-PS 21 85 068 bekannte Ventil, das auch an der Atemmaske angeordnet ist sowie für das in der FR-PS 1347 054 beschriebene Ventil, welches sich am Anschlußstück der Atemmaske befindetThe same applies to the valve known from US Pat. No. 2,185,068, which is also arranged on the breathing mask is as well as for the valve described in FR-PS 1347 054, which is located on the connector of the Breathing mask is located

Es ist somit Aufgabe der vorliegenden Erfindung, eine Druckbegrenzungseinrichtung der eingangs genannten Art zu schaffen, weiche die Verwendung nichtelastischer Atembeutel gestattet und leicht auch in bestehende Anlagen eingefügt werden kann.It is therefore the object of the present invention to provide a pressure-limiting device of the type mentioned at the beginning Kind of creating soft the use of non-elastic Breathing bag permitted and can easily be inserted into existing systems.

Diese Aufgabe wird durch die im Hauptanspruch beschriebene Erfindung gelöstThis object is achieved by the invention described in the main claim

Ein Ausführungsbesspiel der Erfindung wird nachfolgend anhand der Zeichnung näher erläutert; es zeigtAn exemplary embodiment of the invention is explained in more detail below with reference to the drawing; it shows

F i g. 1 die perspektivische Ansicht eines Anästhesiegeräts mit der erfindungsgemäßen Druckbegrenzungseinrichtung; F i g. 1 shows the perspective view of an anesthesia machine with the pressure limiting device according to the invention;

Fig.2 einen Längsschnitt durch die Druckbegrenzungseinrichtung von F i g. 1;2 shows a longitudinal section through the pressure limiting device from F i g. 1;

F i g. 3 einen Schnitt gemäß Linie 27-27 von F i g. 2.F i g. 3 shows a section along line 27-27 of FIG. 2.

Wie aus den Fig. t—3 hervorgeht, ist ein Abschnitt elastischen Schlauchs 400 um eine Arbeitsleitung herum angebracht, wobei die Enden des Schlauches 400 dicht bei 404 und 406 mit der Arbeitsleitung 402 verbundenAs can be seen in Figures t-3, a length of resilient hose 400 is mounted around a working line with the ends of hose 400 connected to working line 402 closely at 404 and 406

sind. Eine öffnung 408 stellt eine Verbindung zwischen dem Inneren des elastischen Schlaih.hr 400 und dem Inneren der Arbeitsleitung 402 her. Infolge dieser Bauweise wirkt der Schlauch 400 als Druckkessel, wobei durch geeignete Wahl der physikalischen Parameter (Länge, Materialdicke und Elastizität) der elastische Abschnitt den Patienten in gleicher Weise schützt wie ein elastischer Atembeutel. Die Kosten von Schlauch 400 zuzüglich Atembeutel aus Kunststoff sind jedoch bedeutend geringer als die Kosten eines elastischen Atembeutels. Darüber hinaus ist bei der üblichen Anästhesieanordnung der elastische Schlauch 400 leichtare. An opening 408 establishes a connection between the interior of the elastic hose 400 and the interior of the working line 402 . As a result of this construction, the hose 400 acts as a pressure vessel, with the elastic section protecting the patient in the same way as an elastic breathing bag through a suitable choice of the physical parameters (length, material thickness and elasticity). However, the cost of tube 400 plus plastic breathing bag is significantly less than the cost of an elastic breathing bag. In addition, in the usual anesthesia arrangement, the elastic tube 400 is light

so in einer Stellung anzubringen, in der er durch den Anästhesisten beobachtet werden kann.so to be installed in a position in which it is through the Anesthetists can be observed.

E'n elastischer Vorspannring 410 ist zwischen den dicht verschlossenen Enden 404 und 406 um den Schlauch 400 gelegt. Der Schlauch 400 ist zwischen dem Vorspannring 410 und dem Ende 406 bei 412 geschlitzt. Vorzugsweise ist ein Ring 411 zwischen den Wellungen unter dem Vorspannring 410 vorgesehen. Wenn der Druck in der Arbeitsleitung 402 ansteigt, weitet sich der Schlauch 400 und hebt bei einem bestimmten Punkt den elastischen Vorspannring 410 von der Arbeitsleitung 402 ab, so daß ein Durchlecken über den Ring 411 hinaus stattfinden kann. Das über den Ring 411 hinausgelangende Gas tritt durch den Schlitz 412 aus. Wenn das Gas durch den Schlitz 412 austritt, wirkt das dem Schlitz benachbarte Material als Zunge und erzeugt eine hörbare Warnung für den Anästhesisten.An elastic pretensioning ring 410 is placed around the hose 400 between the tightly closed ends 404 and 406 . The hose 400 is slotted between the biasing ring 410 and the end 406 at 412. Preferably, a ring 411 is provided between the corrugations under the preload ring 410 . When the pressure in the working line 402 increases, the hose 400 expands and at a certain point lifts the elastic pretensioning ring 410 from the working line 402 so that a leak through the ring 411 can take place. The gas that has passed through the ring 411 exits through the slot 412 . As the gas exits through slot 412 , the material adjacent to the slot acts as a tongue and creates an audible warning to the anesthetist.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims (1)

Patentanspruch:Claim: Druckbegrenzungseinrichtung, insbesondere TQr Anästhestegeräte, mit einer Einlaßkammer, die zwischen einem elastischen Schlauch und einem mit einer Auslaßöffnung versehenen Abschnitt eines inneren Rohres ausgebildet ist, wobei die Enden des elastischen Schlauches strömungsmitteldicht mit der Außenseite des inneren Rohres verbunden sind, und mit einer Auslaßkammer, dadurch gekennzeichnet, daß im Abstand von einem Ende (404) des inneren Rohres (402), jenseits der Auslaißöffnung (408) über dem elastischen Schlauch (400) ein elastischer Vorspannring (410) angeordnet ist, der unter Oberwindung seiner elastischen Vorspannung gemeinsam mit dem elastischen Schlauch i(400) von der Außenseite des inneren Rohres (102) abhebbar ist, und daß in einem zwischen dem Vorapannring (410) und dem anderen Ende des Schlauchs (460) liegenden Abschnitt des Schlauchs (400) ein Schnitt (412) vorgesehen istPressure limiting device, in particular TQr anesthesia devices, with an inlet chamber which is formed between an elastic hose and a section of an inner tube provided with an outlet opening, the ends of the elastic hose being fluid-tightly connected to the outside of the inner tube, and with an outlet chamber thereby characterized in that at a distance from one end (404) of the inner tube (402), beyond the outlet opening (408) above the elastic hose (400), an elastic prestressing ring (410) is arranged which, overcoming its elastic prestress, together with the elastic Hose i (400) can be lifted off the outside of the inner tube (102), and that a cut (412) is provided in a section of the hose (400) lying between the pre-clamping ring (410) and the other end of the hose (460)
DE2365725A 1972-01-17 1973-01-17 Pressure limiting device, in particular for anesthesia machines Expired DE2365725C3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00218337A US3814091A (en) 1972-01-17 1972-01-17 Anesthesia rebreathing apparatus

Publications (3)

Publication Number Publication Date
DE2365725A1 DE2365725A1 (en) 1976-05-20
DE2365725B2 true DE2365725B2 (en) 1979-06-07
DE2365725C3 DE2365725C3 (en) 1980-02-14

Family

ID=22814702

Family Applications (5)

Application Number Title Priority Date Filing Date
DE2365879A Expired DE2365879C3 (en) 1972-01-17 1973-01-17 Pressure relief valve for an anesthetic ventilator
DE2365855A Expired DE2365855C3 (en) 1972-01-17 1973-01-17 Device for processing ventilation gas in anesthesia machines
DE2302110A Expired DE2302110C3 (en) 1972-01-17 1973-01-17 Anesthesia machine
DE2365724A Granted DE2365724B2 (en) 1972-01-17 1973-01-17 Breathing bag
DE2365725A Expired DE2365725C3 (en) 1972-01-17 1973-01-17 Pressure limiting device, in particular for anesthesia machines

Family Applications Before (4)

Application Number Title Priority Date Filing Date
DE2365879A Expired DE2365879C3 (en) 1972-01-17 1973-01-17 Pressure relief valve for an anesthetic ventilator
DE2365855A Expired DE2365855C3 (en) 1972-01-17 1973-01-17 Device for processing ventilation gas in anesthesia machines
DE2302110A Expired DE2302110C3 (en) 1972-01-17 1973-01-17 Anesthesia machine
DE2365724A Granted DE2365724B2 (en) 1972-01-17 1973-01-17 Breathing bag

Country Status (13)

Country Link
US (1) US3814091A (en)
JP (5) JPS5441839B2 (en)
AU (1) AU490936B2 (en)
BR (1) BR7300367D0 (en)
CA (1) CA969056A (en)
CH (4) CH583039A5 (en)
DE (5) DE2365879C3 (en)
FR (5) FR2168404B1 (en)
GB (4) GB1427434A (en)
IT (1) IT978233B (en)
NL (1) NL164476C (en)
SE (4) SE410272B (en)
SU (1) SU733505A3 (en)

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CH583042A5 (en) 1976-12-31
JPS5442756B2 (en) 1979-12-15
FR2168404A1 (en) 1973-08-31
CH583039A5 (en) 1976-12-31
GB1427432A (en) 1976-03-10
FR2278353B1 (en) 1979-06-15
DE2365879A1 (en) 1976-08-26
JPS5517589B2 (en) 1980-05-13
GB1427433A (en) 1976-03-10
DE2365879B2 (en) 1979-05-10
SU733505A3 (en) 1980-05-05
FR2338053B1 (en) 1980-02-08
FR2338053A1 (en) 1977-08-12
JPS5442758B2 (en) 1979-12-15
SE419942B (en) 1981-09-07
SE419289B (en) 1981-07-27
JPS5316489A (en) 1978-02-15
NL164476C (en) 1981-01-15
JPS5442757B2 (en) 1979-12-15
SE7607066L (en) 1976-06-21
SE410272B (en) 1979-10-08
DE2302110C3 (en) 1979-12-06
AU5118673A (en) 1974-07-18
AU490936B2 (en) 1976-06-24
DE2365724A1 (en) 1976-02-26
DE2302110B2 (en) 1979-04-26
DE2365725A1 (en) 1976-05-20
FR2309243A1 (en) 1976-11-26
CH583040A5 (en) 1976-12-31
DE2365855A1 (en) 1976-08-05
DE2365724B2 (en) 1978-08-31
DE2302110A1 (en) 1973-07-26
FR2338054B1 (en) 1981-01-09
SE7607065L (en) 1976-06-21
JPS5316491A (en) 1978-02-15
JPS5441839B2 (en) 1979-12-11
FR2168404B1 (en) 1979-04-27
GB1427434A (en) 1976-03-10
FR2309243B1 (en) 1979-06-15
GB1427431A (en) 1976-03-10
BR7300367D0 (en) 1973-10-25
DE2365855B2 (en) 1977-12-29
IT978233B (en) 1974-09-20
FR2278353A1 (en) 1976-02-13
NL164476B (en) 1980-08-15
US3814091A (en) 1974-06-04
CA969056A (en) 1975-06-10
NL7300684A (en) 1973-07-19
DE2365725C3 (en) 1980-02-14
JPS4879487A (en) 1973-10-24
JPS5316490A (en) 1978-02-15
DE2365724C3 (en) 1979-05-03
FR2338054A2 (en) 1977-08-12
CH583041A5 (en) 1976-12-31
DE2365879C3 (en) 1980-01-31
DE2365855C3 (en) 1978-08-24
SE7607064L (en) 1976-06-21
JPS5316488A (en) 1978-02-15
AU1258476A (en) 1976-06-24

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