US3548822A - Device to prevent hyperventilation - Google Patents

Device to prevent hyperventilation Download PDF

Info

Publication number
US3548822A
US3548822A US669973A US3548822DA US3548822A US 3548822 A US3548822 A US 3548822A US 669973 A US669973 A US 669973A US 3548822D A US3548822D A US 3548822DA US 3548822 A US3548822 A US 3548822A
Authority
US
United States
Prior art keywords
bellows
valve
air
wall
pressure
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.)
Expired - Lifetime
Application number
US669973A
Other languages
English (en)
Inventor
Henry W Seeler
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
Priority claimed from US236029A external-priority patent/US3356100A/en
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3548822A publication Critical patent/US3548822A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • A61M16/0048—Mouth-to-mouth respiration
    • 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
    • A61M16/0078—Breathing 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
    • A61M16/0057—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
    • A61M16/20—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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/105—Filters
    • A61M16/106—Filters in a path
    • A61M16/107—Filters in a path in the inspiratory path

Definitions

  • a device to prevent hyperventilation during 45 P t t d rapidly repeated inhalation and exhalation comprises a bul- I 1 a en 6 bous member having an inlet port adapted to communicate with the user's airway, an outlet port and a third port adapted 54] DEVICE o PREVENT HYPERVENTILATION to communicate with the ambient atmosphere.
  • a first n pressure responsive valve closes the outlet port and a second [52] 128/1453 pressure responsive valve opens the third port to permit the 128/1455 user to inhale fresh air.
  • said one first valve opens and said second valve closes to [501 Field ofSearch 128/ 145.2, permit the user to exhale through the bulbous member to said 145-8 outlet port.
  • a storage tube disposed within the bulbous member and communicating with said inlet port retains a por- [56] Rae-mm cued tion of the users exhaled air for return to the users lungs upon UNITED STATES PATENTS subsequent inhalation by the user from said first port.
  • a cap is 2,428,451 10/ 1947 Emerson 128/1457 provided for closing the inlet port, and the bulbous member is 3,099,985 8/1963 Wilson 128/ 145.5 resiliently compressible to allow for squeezing the bulbous 3,216,4l3 l 1/1965 Arecheta 128/ 145.7 member to force air through the outlet port.
  • This invention relates to a device for use in lung powered breathing assistance applications and more particularly to a device for preventing hyperventilation in lung powered breathing assistance operations.
  • the invention is not necessarily so limited.
  • An object of the present invention is to provide a new and improved breathing assistor or resuscitator apparatus.
  • a further object of the present invention is to provide a new and improved bellows device which can be manually manipulated to pump a fluid and which, withminor adjustment, can be used as an adapter to protect a human operator against hyperventilation in lung powered blowing operations.
  • a further object of the present invention is to provide a breathing assistor or resuscitator device suitable for manual operation and, with minor adjustment, suitable for operation as a mouth-to-mask resuscitator.
  • FIG. 1 is a sectional view of a breathing assistance device constructed in accordance with the present invention.
  • FIG. 2 is a sectional view, taken substantially along the line 2-2 of FIG. 1.
  • FIG. 3 is a fragmentary, sectional view illustrating a bellows unit used in the device of FIG. 1 prior to assembly of a fluid distribution valve therein.
  • FIG. 4 is a fragmentary, sectional view, taken substantially along the line 4-4 of FIG. 3.
  • FIG. 5 is an elevational view of the fluid distribution valve with portions broken away to reveal the interior construction thereof, this figure illustrating one condition of operation of the fluid distribution valve.
  • FIG. 6 is an elevational view of the fluid distribution valve with portions broken away to illustrate another condition of operation thereof.
  • FIG. 7 is a fragmentary, elevational view illustrating one mode of operation of the breathing assistance device of FIG. 1.
  • FIG. 8 is a fragmentary, elevational view illustrating a second mode of operation of the breathing assistance device of FIG. 1. 7,
  • the resuscitation device disclosed includes two basic components.
  • One basic component is a dual purpose bellows unit 10 which can be used alternatively to pump air into the lungs of a patient or other chamber, or as an adapter for mouth-to-mask resuscitation or for a similar blowing operation, the bellows unit being so constructed as to avoid hyperventilation in the user thereof.
  • the other basic component is a fluid distribution valve which enables a fluid, such as a breathing gas, to be forced into a patients lungs or other chamber and also enables the fluid or breathing gas to be expelled from the patients lungs or other chamber to the ambient atmosphere.
  • the bellows unit which is best illustrated in FIGS. 1 through 4, comprises a generally hollow ovate bag or bulb constructed of a resilient material, which may be a rubber or a synthetic plastic material.
  • a thickened wall 12 surrounds an enlarged opening to the interior of the bellows unit. As will be more fully described hereinafter, this enlarged opening receives and supports a housing 14 for the fluid distribution valve.
  • a smaller opening 15 is encircled by an annular wall 16.
  • This annular wall is adapted to receive a plug 18 for closing the opening 15.
  • the lower end of the plug has an enlarged annular head'20 thereon, which may be forced into the opening 15 to seat in an annular groove 22 located on the inner surface of the wall 16.
  • a chain 24, as shown, may be used to attach the plug 18 permanently to the ferrule 26.
  • annular wall or tube 30 projecting inwardly of the bellows I0 from the opening 15 is integrally secured with the bag 10, so as to extend the opening 15 downwardly toward the lower end of the bag, as viewed in FIG. 1.
  • the bag III has been previously characterized as generally ovate.
  • the bellows may have any hollow configuration, the important characteristic being that the resilient material with which the bellows I0 is constructed has a natural shape to which it returns after being distorted, as by compression.
  • the bellows It it is desired that the bellows It) have the shape of a surface of revolution generated about the central axis of the pipe 30, whereby the outer periphery of the bellows in any plane normal to such axis is essentially circular, as shown in FIG. 2.
  • I-IOwever those skilled in the art will recognize that any oval or otherwise rotund shape will suffice for the special purposes described herebelow.
  • the wall thickness of the bellows 10 tapers from diametrically disposed minima 32 to diametrically disposed maxima 34, as shown in FIG. 2, the maxima being approximately twice the thickness of the minima.
  • the bellows has two diametrically opposed generally crescent shaped sides joined at 32 by a web of minimum thickness.
  • the thicker walled crescent shaped sides at 34 accumulate a restoring force which will act quickly to restore the shape of the bellows unit upon release of the compressive force.
  • Finger grooves 36a, 36b, 36c and 36d together with a thumb groove 36c, formed in the wall of the bellows unit at the thinnest portions thereof, identify the thin wall portions of the bellows unit and assist an attendant in applying a compressive force at the proper points.
  • valve support 38 Near the lower end of the bellows unit, as viewed in FIG. I, a valve support 38 is shown. This support, which is partially obscured in FIG. 1 by the housing 14, appears in detail in FIGS. 3 and 4.
  • the valve support 38 includes a generally planar wall 39 integral with the bellows 10; but recessed a distance into the interior of the bellows. Located in the wall 39 are a pair of arcuate apertures 40, separated by an intermediate web portion 42. This web portion has a central aperture which receives the stem 46 of an inlet flapper valve 44 adapted to seat upon the interior surface of the wall 39.
  • the flapper valve 44 is anchored by means of a tapered enlargement 48 on the end of the valve stem 46 which, when forced through the aperture in the web 42, expands to firmly lock the valve in place.
  • An opening 47 extends through the exterior wall of the bellows 10 to the apertures 40, so as to permit the passage of air from the surrounding atmosphere into the bellows 10.
  • An annular groove 50 formed in the wall surrounding the opening 47, provides a seat for a' filter element (not shown) which may be used to filter air moving into the bellows through the opening 47, when desired, or for an inlet adapter (not shown), similar in external configuration to the plug 18, but having a conduit therethrough.
  • the flapper valve 44 lifts off the wall 39 to permit entry of air from the surrounding atmosphere into the bellows whenever the pressure in the atmosphere exceeds that inside the bellows; but seats on the wall 39 soas to prevent the movement of air or gas from inside the bellows to the ambient atmosphere whenever the pressure in the bellows exceeds that of the ambient atmosphere.
  • the wall 39 is located in the thickened wall portion of the bellows 10, so as, to minimize distortion of the inlet valve support due to compression and relaxation of the bellows.
  • a fluid distribution valve housing 14 is received in the lower end of the bellows 10, as viewed in FIG, I.
  • This valve housing is formed of two separable sections 52 and 54, which have circular peripheries adapted to interfit the annular wall 12 located at the lower end of the bellows 10. Adjacent their peripheries, the housing sections 52 and 54 have annular grooves 56 and 58, respectively, therein. These annular grooves receive annular tongue portions projecting inwardly from the inner surface of the wall 12 and this tongue and groove construction provides a fluid seal surrounding the housing 14. By means of a slight misfit between these tongue and groove portions, a tension is developed in the wall 12, whereby this wall supports the housing sections 52 and 54 in intimate engagement.
  • the central portions of the opposing faces of the housing sections 52 and 54 are recessed away from one another so as to form a fluid receiving cavity 66 therebetween.
  • a fitting 70 formed on the housing section 52 surrounds a first opening 68 leading to the fluid receiving cavity.
  • An aperture 72 formed centrally in the housing section 52 provides a second opening to the fluid receiving cavity.
  • the aperture 72 is surrounded by an annular valve seat 74, the function of which will be described subsequently.
  • a fitting 76 formed on the housing section 54 surrounds a third opening 78 leading to the fluid receiving cavity 66. Communication from the opening 78 through the wall of the housing section 54 is afforded by means of apertures 80 flanking a web portion 82, which may be similar in configuration to the apertures 40 and the web portion 42 employed in the inlet valve previously described. As well understood by those skilled in the art, the apertures 80 may also comprise simple holes formed adjacent the web portion 82, only one hole being essential to the function performed thereby.
  • the web 82 has an aperture therein which receives the stem 84 of a resilient flapper valve 86 located in the interior of the fluid receiving cavity 66, As will appear more fully in the subsequent description, this flapper valve 86 functions to distribute a fluid to various openings in the valve housing 14 and, accordingly, is sometimes designated herein as a fluid distribution valve.
  • the stem 84 includes an enlargement 88, which may be forced through the aperture in the web 82 to a point where it can expand to lock the valve 86 in position.
  • An annular wall 89 surrounding the aperture in the web 82 on the interior side of the housing section 54, supports the valve 86 a predetermined distance from the interior wall of the housing section 54.
  • the one piece valve 86 For purposes of description, it is helpful to subdivide the one piece valve 86 into two sections, one comprising a circular and planar section 90 and the other comprising a diverging peripheral flange portion 92, which surrounds the planar section 90.
  • a peripheral surface of the flange section 92 lightly engages the interior wall 94 of the housing section 54 in surrounding relation to the apertures 80, the interior surface of the housing section 54 serving as a valve seat.
  • the surface of the planar portion 90 on the opposite side of the valve 86 lightly engages the valve seat 74 surrounding the aperture 72 and the housing section 52.
  • valve 86 lightly touches the aforementioned valve seats in its rest position
  • the light touching condition described while desirable, is not essential and that insubstantial gaps between the valve and its respective valve seats in the rest position can be tolerated.
  • FIG. 8 illustrates utilization of the device as a manually operated breathing assistor or resuscitator.
  • the plug 18 is inserted into the opening of the bellows unit 10 and a breathing mask 100 is attached to the fitting 70 provided on the valve housing 14 using a suitably shaped, elbow 102.
  • the fitting 70 is provided with a tapered external wall, as shown.
  • the breathing mask 100 can be of a well known conventional construction and for the purposes of the present description, it suffices to note that this breathing mask provides a confined passage from the valve housing 14 directly to the mouth and nose of the patient.
  • the gas pressure in the patients lungs cooperates with the pressure in the ambient atmosphere, both of which exceed the gas pressure within the bellows 10, to lift the planar section 90 of the flapper valve 86 off the valve seat 74 surrounding the aperture 72 in the housing section 52.
  • the configuration of the flapper valve 86 at this time is illustrated in FIG. 6.
  • the separation of the flapper valve from the valve seat 74 creates a passage through which air may move from the patients lungs, through the breathing mask 100 into the gas receiving cavity 66 of the valve housing 14 and ultimately to the ambient atmosphere through the aperture 72 in such valve housing. Since the gas pressure within the bellows 10 will not rise above that of the ambient atmosphere until further pressure is applied to the bellows, a natural exhalation of air from the patients lungs can continue until such time as the patients lung pressure has dropped to approximately that of the am bient atmosphere. Specifically, patient exhalation can continue until such time as the patients lung pressure is insufficient to hold the flapper valve off the valve seat 74. Since, as previously described, the contact between the flapper valve and the valve seat 74 is a light touching contact in the rest position of the flapper valve, the patients lung pressure at the termination of the natural exhalation described will be only negligibly greater than that of the ambient atmosphere.
  • FIG. 7 illustrates utilization of the device of FIG. 1 for mouth-to-mask resuscitation.
  • a mask 100 covering the mouth and nose of the patient is attached to the fitting 70 on the housing 14 for the fluid distribution valve.
  • the plug 18 is removed from the opening 15 in the upper end of the bellows 10.
  • the attendant administering mouth-to-mask resuscitation holds the mask tightly over the patients mouth and nose while engaging the opening 15 in the bellows unit with his own mouth, as shown in FIG. 7.
  • the attendant then blows or forcibly exhales into the opening 15 of the bellows 10, causing the gas pressure within the bellows to rise above that of the ambient atmosphere.
  • the elevated pressure firmly seats the inlet valve 44 against its seat on the adjacent wall 39, preventing the escape of air from the interior of the bellows directly to the ambient atmosphere.
  • the pressure developed in the bellows 10 causes the fluid distribution valve86 to seat tightly on the valve seat 74. At the same.
  • the forced exhalation by the attendant causes the fluid distribution valve to lift off its seat against the interior surface of the housing section 54, permitting air to flow from the bellows through the opening 68 in the valve housing 14 to the face mask and from there to the patients lungs.
  • This forced movement of air into the patients lungs causes the patients lung pressure to riseabove that of the ambient atmosphere.
  • the first air inhaled comprises his own exhaled air which resides in the interiorly disposed tube 30 within the bellows 10, together with a quantity of his own exhaled air residing in the lower part of the bellows 10 below the end of the tube 30.
  • This air is followed by fresh air from the inlet valve 44 which moves into the patients lungs and replaces the air and in the tube 30 in the lower part of the bellows l0.'As will be described more fully in the succeeding remarks, this inhalation by the attendant of a quantity of his own exhaled air during each breathing cycle prevents the condition known-as hyperventilation in the attendant.
  • the first air forced into the patients lungs comprises fresh air from the tube 30 within the bellows 10, together with a quantity of fresh air located in the lower portion of the bellows 10 below the tube 30.
  • air from the lungs of the attendant is forced directly into the patients lungs, the end result being that the patient receives a mixture of fresh air with air exhaled from the attendants lungs.
  • This type of resuscitation can be continued indefinitely, with the fluid distribution valve automatically assuming the proper position at each portion of the breathing cycle, and with this valve further functioning to prevent any movement of air from the patients lungs directly tendant.
  • the bellows 10 have an interior volume of approximately l000 cubic centimeters and that the tube 30, together with the lower portion of the bellows below the lower end of the tube 30 have a volume of approximately 300 cubic centimeters.
  • the patient receives approximately 300 cubic centimeters of fresh air and during each inhalation cycle of the attendant, the attendant receives approximately 300 previously exhaled air which has high carbon dioxide content. This return of carbon dioxide to the lungs of the attendant avoids dizziness and hyperventilation of the attendant.
  • the 1000 cubic centimeter and 300 cubic centimeter figures are not critical.
  • the 1000 cubic centimeter volume of the entire bellows produces an overall size which is convenient for manual squeezing and wherein a sufiicient amount of air is displaced in each squeezing operation to accomplish a life sustaining respiration in the lungs of the patient.
  • the total volume of the bellows 10 is other wise unimportant.
  • the 300 cubic centimeters of retained air capacity created by the interior tube 30 has practical limits. If the retained air capacity substantially matched that of the attendant's inhalation and exhalation capacity, the patient would receive entirely fresh air. However, the attendant would receive only his own exhaled air and this would be obviously undesirable. Similarly, if the retained air capacity becomes too small, insufficient carbon dioxide is returned to the attendant's lungs to prevent hyperventilation.
  • the bellows 10 with its interiorly located tube 30 can serve a useful purpose in other applications than patient resuscitation.
  • the bellows permits an individual to blow forcefully for. prolonged periods of time without encountering hyperventilation. It is, accordingly, use:
  • the fluid distribution valve 86 may be replaced by any simple check valve, or, alternatively, the aperture 72 in the valve housing 14 plugged to enable inflation directly through the fitting 70 without removal of the fluid distribution valve 86.
  • the fluid distribution valve functions as a check valve, which permits fluids to leave the bellows, but prevents entry of fluids into the bellows.
  • an adapter similar to the plug l8 but having a conduit therethrough, may be inserted into the opening 47 leading to the inlet valve 44, and connected directly to a source of breathing gas which can be intermittently released into the bellows 10 to induce forced respiration of a patient.
  • each of the component parts of the device illustrated may be fabricated from noncorrosive elements. ln particular, the operation of the fluid distribution valve is governed solely by the pressures encountered in the normal breathing cycle and no springs or other biasing ele ments assisting the positioning of the fluid distribution valve are required. Thus, the need for metallic elements is entirely eliminated and contaminating chemical actions are precluded.
  • Apparatus adapted for alternative operation as a hand powered or as a lung powered pumping device comprising: a substantially hollow resilient .body having a fluid outlet port and a fluid inlet port spaced from said outlet port, first valve means disposed adjacent said fluid inlet port responsive to a fluid pressure within said body exceeding that outside said body to close said fluid inlet port, second valve means disposed adjacent said fluid outlet port responsive to a fluid pressure outside said body exceeding that within said body to close said outlet port, said resilient body having a third port therein spaced from said inlet and outlet ports, an elongate tubular element disposed internally of said body having one end encircling said third port and attached to the wall of said body and having its other end projecting through the interior of said body toward said outlet port, the interior volume of said tubular element togethervwith the interior volume of said body which is beyond the axial extent of said tubular element being less than one-half the entire interior volume of said body, and means to selectively open and close said third port, the construction and arrangement being such that with closure of said third
  • said body is an elongate body and has a rotund cross section in substantially all planes normal to the longitudinal axis thereof, the wall of said body having a thickness in any said plane which tapers from a minimum at the opposite ends of one diametric axis of said body to a maximum at the opposite ends of another diametric axis of said body extending substantially normal to said one diametric axis whereby said body has two diametrically opposed axially extending sides of crescent shaped cross section joined by axially extending wall portions of minimum thickness, said crescent shaped sides yieldingly opposing compressive forces applied to said body at said wall portions of minimum thickness and thereby accumulating potential energy to restore the shape of said body upon release of said compressive forces.

Landscapes

  • 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)
  • Critical Care (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
US669973A 1962-11-07 1967-09-22 Device to prevent hyperventilation Expired - Lifetime US3548822A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US236029A US3356100A (en) 1962-11-07 1962-11-07 Breathing control valve and operator therefor
US66997367A 1967-09-22 1967-09-22

Publications (1)

Publication Number Publication Date
US3548822A true US3548822A (en) 1970-12-22

Family

ID=26929394

Family Applications (1)

Application Number Title Priority Date Filing Date
US669973A Expired - Lifetime US3548822A (en) 1962-11-07 1967-09-22 Device to prevent hyperventilation

Country Status (3)

Country Link
US (1) US3548822A (fr)
CH (1) CH419461A (fr)
NL (1) NL301476A (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866622A (en) * 1972-03-18 1975-02-18 Kawasaki Heavy Ind Ltd Open circuit breathing apparatus
US4007737A (en) * 1974-01-28 1977-02-15 Paluch Bernard R Anesthesia breathing system
US4176666A (en) * 1976-06-01 1979-12-04 Hovey Thomas C Gas scavenger system
US4535765A (en) * 1983-07-07 1985-08-20 John A. Paoluccio Lifesaving device
US4886057A (en) * 1987-11-30 1989-12-12 E Z Breathe, Inc. Assisted breathing interface device
US4967742A (en) * 1987-03-10 1990-11-06 Theodorou Ignatius E Portable breathing device
EP0657181A2 (fr) * 1993-12-08 1995-06-14 Heraeus Instruments GmbH Ballon d'insufflateur manuel
US20090071482A1 (en) * 2005-05-07 2009-03-19 Smiths Group Plc Resuscitators
US20180361092A1 (en) * 2017-05-19 2018-12-20 Mark A. Crowell Rescue breathing apparatus
WO2022078797A1 (fr) * 2020-10-15 2022-04-21 Ambu A/S Réanimateur

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866622A (en) * 1972-03-18 1975-02-18 Kawasaki Heavy Ind Ltd Open circuit breathing apparatus
US4007737A (en) * 1974-01-28 1977-02-15 Paluch Bernard R Anesthesia breathing system
US4176666A (en) * 1976-06-01 1979-12-04 Hovey Thomas C Gas scavenger system
US4535765A (en) * 1983-07-07 1985-08-20 John A. Paoluccio Lifesaving device
US4967742A (en) * 1987-03-10 1990-11-06 Theodorou Ignatius E Portable breathing device
US4886057A (en) * 1987-11-30 1989-12-12 E Z Breathe, Inc. Assisted breathing interface device
EP0657181A2 (fr) * 1993-12-08 1995-06-14 Heraeus Instruments GmbH Ballon d'insufflateur manuel
EP0657181A3 (fr) * 1993-12-08 1995-07-26 Heraeus Instr Gmbh Ballon d'insufflateur manuel.
US5520173A (en) * 1993-12-08 1996-05-28 Heraeus Instruments Gmbh Ventilation bag
US20090071482A1 (en) * 2005-05-07 2009-03-19 Smiths Group Plc Resuscitators
US20180361092A1 (en) * 2017-05-19 2018-12-20 Mark A. Crowell Rescue breathing apparatus
US10864338B2 (en) * 2017-05-19 2020-12-15 Austere Medical Group, Llc Rescue breathing apparatus
WO2022078797A1 (fr) * 2020-10-15 2022-04-21 Ambu A/S Réanimateur

Also Published As

Publication number Publication date
NL301476A (fr)
CH419461A (de) 1966-08-31

Similar Documents

Publication Publication Date Title
US3356100A (en) Breathing control valve and operator therefor
EP1023099B1 (fr) Modulateur de pression pulmonaire
US4579114A (en) Mouth to mouth resuscitation device
US6253767B1 (en) Gas concentrator
JP2922546B2 (ja) 使い捨て蘇生器
US3046978A (en) Manually operated resuscitator
US5313938A (en) Valved resuscitation pump having secretion removal means
US3009459A (en) Apparatus for artificial respiration
US3037497A (en) Portable artificial respirator
US4449525A (en) Pulmonary resuscitator
US5295478A (en) Mouth-to-mask resuscitator
US20080015475A1 (en) Manual resuscitation device
US6792947B1 (en) Flow control valve for manual resuscitator devices
US5558371A (en) Resuscitator
US5540221A (en) Resuscitator
JPH0126310B2 (fr)
US5546934A (en) Resuscitator
JP3782733B2 (ja) 人又は動物にガスを投与するための装置
US3548822A (en) Device to prevent hyperventilation
JPH0596007A (ja) 蘇生装置
WO1994007555A2 (fr) Dispositif de reanimation gonflable
US4520811A (en) Pulmonary resuscitator
US3511228A (en) Bronchial dilator for patients suffering from emphysema and asthma or the like
US3957046A (en) Disposable mouth to mouth resuscitation device
US4942873A (en) Resuscitation device