US3815593A - Static respirator for artificial respiration - Google Patents

Static respirator for artificial respiration Download PDF

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Publication number
US3815593A
US3815593A US00106483A US10648371A US3815593A US 3815593 A US3815593 A US 3815593A US 00106483 A US00106483 A US 00106483A US 10648371 A US10648371 A US 10648371A US 3815593 A US3815593 A US 3815593A
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Prior art keywords
amplifier
outlet
valve
inlet
control
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Expired - Lifetime
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US00106483A
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English (en)
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G Baumont
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LE MATERIEL MEDICAL SCIENT
LE MATERIEL MEDICAL SCIENTIFIQUE FR
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LE MATERIEL MEDICAL SCIENT
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    • 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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
    • Y10T137/212—System comprising plural fluidic devices or stages

Definitions

  • SHEH 2 BF 3 STATIC RESPIRATOR FOR ARTIFICIAL RESPIRATION BACKGROUND OF THE INVENTION This invention relates to static respirators and pressure release apparatus operating one request and used chiefly. in the treatment of lung diseases or respiratory assistance and also for respiratory re-education.
  • Respirator apparatus are usedin hospitals and also at home by the patients themselves at the end of a treatment and re-educational period at the hospital or a sanatorium. These apparatus are generally rather expensive and since they operate mechanically they are also objectionable on account of the maintenance required therefor.
  • the apparatus according to the present invention in spite of its great simplicity, can operate either at the patients demand, i.e., by a simple suction effected through the mouthpiece, or'automatically, and in this last case the expiration pause time is adjustable. All the other respiratory paramaters are alsoadjustable at will, so that the respirator according to this invention can be adpated to any, type of respiration. Thus, under normal operating conditions the demand effort is adjustable.
  • blowing-in pressure and the ventilatory output are adjustable.
  • a very simple device is providedfor retarding the patients expiration, if necessary, and furthermore it is possible to connect this device to a spirometerfor measuring the volume expired or breathed in by the patient.
  • the apparatus constructed according to the teachings of this invention is actuated in a particularly simple manner by means of two miniature units of known type called wall-effect amplifiers" comprising a monostable element and a bistable element.
  • FIG. 1 is a diagram illustrating the basic principles of the static pneumatic respirator according to the inven tion;
  • FIG. 2 is an elevation view of the apparatus of this invention with its accessories
  • FIG. 3 is a diagram similar to FIG. 1 illustrating a modified form of embodiment of the apparatus of this invention
  • FIG. 4 is a section view on a larger scale a pneumatic relay utilized in the apparatus of FIG. 3, in the position obtaining during the insufflation period, and
  • FIG. 5 is a section view similar to FIG. 4 but showing the pneumatic relay in the position obtaining during the expiration period.
  • the apparatus according to this invention is connected to a source 1 of fluid under pressure such as compressed oxygen air under a pressure of, say, three bars (about 43-45 p.s.i.).
  • a source 1 of fluid under pressure such as compressed oxygen air under a pressure of, say, three bars (about 43-45 p.s.i.).
  • a miniature pressure-regulator 2 is interposed which is adapted to deliver at its outlet the fluid under reduced and constant pressure, irrespective of the fluid inlet pressure as delivered by said source, so that this last-named pressure is, therefore, variable from about 2.3 to about 4.5 bars (33 to psi.) without impairing the operation of the apparatus.
  • the adjustments are made with a view to deliver fluid under a pressure of 3 bars (about 43.5 p.s.i.). This value is selected preferably because it is the one most frequently adopted for gas supply pipe systems.
  • the outlet of the pressure regulator is fluidally connected on the one hand to an inlet PS of a monostable fluid amplifier 3 through a throttling passage 4 permitting reduction of the pressure at the inlet of the amplitier 3, and on the other hand to an inlet PS of a bistable fluid amplifier 5 through a valve'6 permitting regulation of the insufflation pressure.
  • the monostable fluid amplifier 3 comprises two asymmetric outlets0 and 1 corresponding to the inoperative and operative positions, respectively of this amplifier and first-and second opposite control inlets C3 and C4 located on the side of outlets 0 and 1, respectively.
  • the principle of operation of this monostable fluid amplifier is well known: when the amplifier is in its normal or inoperative position the gas fed under pressure to the inlet PSemerges normally through the aligned circuit leading to the outlet 0.
  • the outlet 0 of the monostable fluid amplifier 3 is fluidally connected to its control inlet C3 through'a valve 7 in order to permit the adjustment of the request effort, as will be explained hereinafter.
  • the bistable fluid amplifier 5 comprises in addition to the inlet PS two symmetric outlets 0 and l, and first and second opposed control inlets C3and C4. Finally, the bistable amplifier 5 comprises two other control members, namely either. third and fourth opposed control inlets Cl and C2 (FIG. 1) or first and second opposed vent ports El and E2 (FIG. 3), the third inlet C l or the first vent port El being disposed on the side of the first control inlet C3 and of the outlet 0.
  • the main gas jet fed to PS is deflected towards the outlet 0 under the controlimpulse applied to C4 or C2, or as a conse- 1 quence of the closing of vent port E2.
  • a control jet or impulse at C3 or C1, or the closing of the other vent port E1 causes the jet to be deflected towards the outlet 1, the jet remaining directed towardsthis outlet after the removal of the control impulse at C3 or the closing of port E1.
  • the outlet, 1 of the bistable fluid amplifier 5 is connected on the one hand to the control inlet of a pneumatic power relay l1 and on the other hand through a pipe line 12 to the interior of a valve-forming bladder 13.
  • the power relay 11 is fluidally connected in series in a circuit extending from the outlet of pressure regulator 2 to a non-return valve 14 connected via a flexible hose 15 to a mouthpiece 16.
  • the aforesaid circuit comprises in succession, between the power relay l1 and valve 14, a valve 17 for adjusting the ventilatory output and a venturi device 18 having its outlet'connected via a pipe line 19 to the non-return valve 14.
  • the non-return valve 14 comprises a venting or expiration orifice or vent hole 20 communicating with the inlet orifice under the control of the aforesaid valveforming bladder 13, and another orifice 21 constantly communicating with the interior of valve 14 and mouthpiece 16.
  • This orifice 21 is connected in turn through a pipe line 22., having connected thereto a pressure-vacuum meter or gauge 23, to the two control inlets C4 of amplifiers 3 and S.
  • the gas jets penetrating into the two amplifiers 3 and 5 through the inlets PS are directed towards the outlets 0.
  • the gas jet appearing at the outlet of monostable amplifier 3 is communicated to its inlet C3 through the valve7, but in this case the pressure prevailing in the control inlet C3 is not sufficient to deflect the gaseous jet towards the outlet of the monostable amplifier 3.
  • the action exerted by the gas flow applied to the left-hand control inlet C3 of this amplifier becomes preponderant and sufficient to deflect the main. gas jet towards the outlet1 of amplifier 3, therefore towards the left-hand control inlet C3 of bistable amplifier 5.
  • the main gas jet is then deflected towards the outlet 1;
  • This gas jet is then transmitted through a pipe line 12 to the interior of bladder 13 and the latter is inflated so as to close the expiration orifice 20 of valve 14.
  • the gas jet appearing at the outlet 1 of the bistable amplifier is also transmitted to the power relay 11' so as to open the same.
  • the insufflation pressure is adjusted by means of valve 6. By more or less opening this valve the supply of gas to the bistable amplifier 5 takes place under a more or less accentuated pressure. The higher this pressure, the higher the pressure required at the control inlet C4 of amplifier 5 in order to switch the gas jet to the outlet 0 of his amplifier.
  • pneumatic switch 9 is set in its operative or ON" position, in which this switch is open. Under these condi tions, the gas jet issuing from the outlet 0 of the bistable amplifier 5 flows through the pause-time adjustment valve S'and through switch 9 to fill up the vessel 10. The latter is filled more or less rapidly according as the valve 8 is more or less open. Thus, the vessel 10 introduces a pressure time-lag at the left-hand control inlet C1 to which the vessel 10 is connected.
  • the casing of the apparatus further comprises the dial 23 of a pressure and vacuum meter or gauge unit 23.
  • the top wall 24 of the casing contains a carrier handle 25.
  • the apparatus comprises a pipe fitting 26 for the ventilation outlet, which is connected to the outlet of the venturi device 18.
  • a humidifier 27 Also connected to the fitting 26 is a humidifier 27 having its outlet connected through a flexible hose 19 to the non-return valve 14.
  • the casing further comprises a pipe fitting 28 for connecting the control outlet of bladder .13 to the pipe line connecting the outlet 1 of the bistable amplifier 5 to the power relay 11. This fitting 28 is also connected to the bladder 13 through the medium of pipe line or hose 12 having the same length as the hose 19 to which it is connected.
  • the apparatus When the apparatus is operating on a supply of compressed air and oxygen, it is connected to a special compressor supplying clean, oil-free compressed air. On the other hand, a source of oxygen 29 must be provided. This source has an output meter 30 disposed at.
  • This bladder is .then connected through a flexible hose 32 to an aspiration fitting 33 provided on the apparatus and connected to an inlet nozzle 18a of the venturi-device 18.
  • the air output and correlatively the oxygen output are then adjusted by means of valve 17.
  • compressed air flowing through the venturi device 18 carries along by induction the oxygen contained in bladder 31 and the patient is thus ventilated with the desired or preset mixture.
  • FIGS. 3, 4 and 5 describe a modified form of embodiment of the respirator of this invention.
  • the component elements similar to or identical with those shown in FIG. 1 are designated by the same reference numerals.
  • This modified construction is advantageous notably in that it permits replacing the fixed vessel intended for introducing a pressure time-lag at the control inlet C1 of the bistable amplifier 5.
  • the rate of filling of the vessel 10 is adjusted by means of a micrometric valve and constitutes therefore a difficult-operation.
  • any modification occurring in the adjustment of valve 17 may have a certain influence on the pause time.
  • the present modification is intended to provide a device permitting a considerably more accurate adjustment of the respiratory pause time period through means requiring lesser preliminary adjustments and also to provide an apparatus in which the pause time is completely independent of the adjustment of the other valves, such as valve 17.
  • the bistable fluid amplifier 5 comprises, in addition to the two control inlets C3 and C4, a pair of vent orifices E1 and E2 opening into the central portion of the amplifier. These vent holes E1 and E2 are adapted to act as the third and fourth control members of the bistable amplifier 5, a
  • the outlet 0 of the bistable amplifier 5 of FIG. 3 is connected to the vent port El through a circuit comprising a pneumatic relay 34 of which an-exemplary form of embodiment is illustrated in detail in FIGS. 4 and 5.
  • the vent port E1 of amplifier 5, to which the relay 34 is connected lies on the same side as the control inlet C3 and outlet 0.
  • the pneumatic relay 34 comprises a body formed with a chamber 35 containing an inflatable bladder 36, and normally connected to the atmosphere via multivarious orifices 37 so that atmospheric pressure is constantly exerted against the outer surface of the inflatable bladder 36 which is thus kept in the position shown in FIG. 4 during the insufflation period.
  • Opening into this chamber 35 is a duct 38 connected to the vent port E1 and adapted to be closed by the bladder 36 when the latter is inflated (see FIG. 5)
  • the interior of the bladder 36 communicates with another duct 39 connected to the pause time adjustment valve 8 and also to a chamber 40 communicating with the atmosphere via an orifice 41 adapted to be closed by a membrane 42.
  • the chamber formed on the opposite side of this membrane 42 communicates via a duct 44 with the outlet 0 of bistable amplifier 5.
  • duct 22 is connected to the venturi device 18 instead of being connected to the body of the non-return valve 14 as in the case of the apparatusillustrated in FIG. 1.
  • a duct 45 connected the inoperative outlet 0 of monostable amplifier 3 to the inlet of the expiratory pause time adjustment valve 8.
  • the apparatus illustrated in FIG. 3 operates as follows:
  • the insufflation pressure is preset by means of vlave 6, the request effort being-adjusted on the other hand by means of valve 7 and the ventilation output by means of valve 17.
  • the gas issuing from the power relay 11 is directed on the one hand towards the atomizer of humidifier 27 and on the other hand through the valve 17 and then through the venturi device 18 in which its volume is doubled by the introduction of fifty per cent of atmospheric air. Then the gas flows through valve 14, the flexible hose l5 and mouthpiece 16 to the patients respiratory tract.
  • the bladder 36 remains inflated.
  • the main gas jet in the bistable amplifier 5 appears at the outlet 0 thereof, whereby a pressure is transmitted via a duct 44 to a chamber 43.
  • this pressure causes the membrane 42 to engage its seat, i.e., orifice 41.
  • gas under pressure introduced through the duct 39 causes the bladder 36 to be inflated and thus close the orifice of the duct 38 connected to vent port El (FIG. 5).
  • the main jet in the bistable amplifier 5 is deflected towards the outlet 1 to begin another insufflation period.
  • Static respirator for artificial respiration disposed in operation between a mouthpiece and a source of gas under pressure comprising: a monostable fluid amplifier having an inlet, two asymmetric outlets corresponding to inoperative and operative conditions of the amplifier, respectively, andflrst and second opposite control inlets disposed on the side of said outlets, re-
  • a fluid circuit comprising, in succession, a
  • pneumatic power relay fluidally connected to said sourceof gas and having a control inlet, another valve for controlling the gas flow, and a venturi device having its outlet connected through a duct to said non-return valve; means fluidally connecting said other outlet of said bistable amplifier to both said control inlet of said pneumatic power relay and to the interior of said inflatable'bladder means fluidally interconnecting the two second control inlets of said amplifiers and providing direct communication between same andone of said venturi'device and said non-return valve; and.
  • a static respirator as set forth in claim 2 including a valve connecting said inlet of said monostable amplifier to the outlet of said pressure regulator for adjusting the insufflation pressure.
  • venturi device comprises an atmospheric air intake, the atmospheric air being carried along by induction inorder to provide at the outlet end of said venturi device a mixture comprising equal volumetric amounts of air and oxygen.
  • Static respirator for artificial respiration disposed in operation between a mouthpiece and a source of gas under pressure comprising: a monostable fluid amplifier having an inlet, two asymmetric outlets corresponding to inoperative and operative conditions of the amplifier, respectively, and first and second opposite control inlets disposed on the side of said outlets, respectively; a bistable fluid amplifier having an inlet, two symmetric outlets corresponding to the inoperative and operative conditions of the amplifier, respectively, and first and second opposite control inlets disposed on the side of said last-named outlets respectively, said amplifiers being both so disposed that their inlets are connectable in use to a source of gas under pressure and each operable to develop a main gas jet and deliver same from one of its outlets; means fluidally connecting one outlet of said monostable amplifier to the first control inlet of the same amplifier to form a control jet which, by interaction with the main jet, tends to deflect said main jet towards the other outlet of said monostable amplifier which corresponds to the operative condition thereof; means fluidally connecting said other outlet of said monostable
  • a static respirator as set forth in claim 5, wherein said pneumatic relay comprises a body defining a chamber, said chamber enclosing an inflated valveforming bladder and communicating normally through 10 a plurality of holes with the surrounding atmosphere, a duct connected to said vent port opening into said chamber and closed by the valve-forming bladder when the latter is inflated, the interior of said bladder communicating with said pause time-adjustment valve and with another chamber connecting said bladder interior to the surrounding atmosphere through an orifice adapted to be closed by one face of a flexible membrane, the other face of said membrane being disposed in front of another chamber communicating via a duct with said one outlet of said bistable amplifier.
  • a static respirator as set forth in claim 6, including a pressure regulator; and means connecting said inlet of said monostable amplifier to the outlet of said pressure regulator through a throttle passage permitting reducing the pressure at the inlet of said monostable amplifier.
  • venturi device comprises an atmospheric air intake, the atmospheric air being carried along by induction in order to provide at the outlet end of said venturi device a mixture comprising equal volumetric amounts of air and oxygen.
  • respirator comprises a casing having on a front face control means associated with said insufflation pressure adjustment valve, said pause time adjustment valve, said demand effort adjustment valve and said ventilatory output adjustment valve, respectively, said casing further comprising a pressure-vacuum gauge connected to the said amplifiers, to said venturi device, and said non-return valve, and a carrier handle disposed at the top of said casing.

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  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
US00106483A 1970-01-16 1971-01-14 Static respirator for artificial respiration Expired - Lifetime US3815593A (en)

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FR7001496A FR2074673A1 (https=) 1970-01-16 1970-01-16

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BE (1) BE761571A (https=)
DE (1) DE2101719C3 (https=)
FR (1) FR2074673A1 (https=)
GB (1) GB1281802A (https=)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456016A (en) * 1982-07-01 1984-06-26 Trutek Research, Inc. Inhalation valve
US5881725A (en) * 1997-08-19 1999-03-16 Victor Equipment Company Pneumatic oxygen conserver
US6364161B1 (en) 2000-09-27 2002-04-02 Victor Equipment Company Oxygen conserver
US20040031485A1 (en) * 2002-08-19 2004-02-19 Andre Rustad Small volume nebulizer
CN105169539A (zh) * 2015-10-30 2015-12-23 深圳市普博科技有限公司 一种急救呼吸机
WO2021191820A1 (en) * 2020-03-24 2021-09-30 Jfd Ltd Ventilation manifold and system
WO2021262393A1 (en) * 2020-06-24 2021-12-30 FluidIQ INC. Devices and related methods for ventilation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2831313A1 (de) * 1978-07-17 1980-02-07 Draegerwerk Ag Geraet zur unterstuetzung der atmung und/oder kuenstlichen beatmung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368555A (en) * 1965-12-02 1968-02-13 Puritan Compressed Gas Corp Respiration apparatus with fluid amplifier
FR1558146A (https=) * 1967-03-27 1969-02-21
US3522816A (en) * 1969-01-30 1970-08-04 George S Springer Fluid system for filling and emptying an enclosure
US3659598A (en) * 1969-06-17 1972-05-02 Gen Medical Corp Respirator with fluid amplifiers with fluid timer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368555A (en) * 1965-12-02 1968-02-13 Puritan Compressed Gas Corp Respiration apparatus with fluid amplifier
FR1558146A (https=) * 1967-03-27 1969-02-21
US3522816A (en) * 1969-01-30 1970-08-04 George S Springer Fluid system for filling and emptying an enclosure
US3659598A (en) * 1969-06-17 1972-05-02 Gen Medical Corp Respirator with fluid amplifiers with fluid timer

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456016A (en) * 1982-07-01 1984-06-26 Trutek Research, Inc. Inhalation valve
US5881725A (en) * 1997-08-19 1999-03-16 Victor Equipment Company Pneumatic oxygen conserver
US6364161B1 (en) 2000-09-27 2002-04-02 Victor Equipment Company Oxygen conserver
US20040031485A1 (en) * 2002-08-19 2004-02-19 Andre Rustad Small volume nebulizer
US7267120B2 (en) 2002-08-19 2007-09-11 Allegiance Corporation Small volume nebulizer
CN105169539A (zh) * 2015-10-30 2015-12-23 深圳市普博科技有限公司 一种急救呼吸机
CN105169539B (zh) * 2015-10-30 2017-12-26 深圳市普博科技有限公司 一种急救呼吸机
WO2021191820A1 (en) * 2020-03-24 2021-09-30 Jfd Ltd Ventilation manifold and system
WO2021262393A1 (en) * 2020-06-24 2021-12-30 FluidIQ INC. Devices and related methods for ventilation

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Publication number Publication date
DE2101719A1 (de) 1971-07-22
BE761571A (fr) 1971-06-16
GB1281802A (en) 1972-07-19
DE2101719C3 (de) 1978-10-12
DE2101719B2 (de) 1978-02-02
FR2074673A1 (https=) 1971-10-08

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