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WO1982004386A1 - Dispositif de reanimation a etages multiples - Google Patents

Dispositif de reanimation a etages multiples Download PDF

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Publication number
WO1982004386A1
WO1982004386A1 PCT/US1982/000795 US8200795W WO8204386A1 WO 1982004386 A1 WO1982004386 A1 WO 1982004386A1 US 8200795 W US8200795 W US 8200795W WO 8204386 A1 WO8204386 A1 WO 8204386A1
Authority
WO
WIPO (PCT)
Prior art keywords
face mask
assembly
fresh air
movement
mask assembly
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.)
Ceased
Application number
PCT/US1982/000795
Other languages
English (en)
Inventor
Technology Survival
Stanley Jay Sarnoff
William R Tarello
Claudio Lopez
Rudolph S Malooley
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.)
Meridian Medical Technologies Inc
Original Assignee
Survival Technology Inc
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 US06/383,962 external-priority patent/US4452241A/en
Application filed by Survival Technology Inc filed Critical Survival Technology Inc
Publication of WO1982004386A1 publication Critical patent/WO1982004386A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • A61M15/00—Inhalators
    • A61M15/009—Inhalators using medicine packages with incorporated spraying means, e.g. aerosol cans
    • 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
    • A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes operated by electrical means
    • A61M16/022—Control means therefor
    • A61M16/024—Control means therefor including calculation means, e.g. using a processor
    • 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
    • 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
    • A61M16/0075—Bellows-type
    • 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
    • A61M16/105—Filters
    • A61M16/106—Filters in a path
    • A61M16/107—Filters in a path in the inspiratory path
    • 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
    • A61M2205/84—General characteristics of the apparatus for treating several patients simultaneously

Definitions

  • This invention relates to apparatus for pro ⁇ viding effective respiratory therapy to a plurality of chemical warfare casualties and more particularly to apparatus for resuscitating a plurality of such patients.
  • Emergency units of this type are basically provided for use with ambulance crews under conditions which are less stringent than those encountered in chemical warfare situations.
  • a basic requirement in a chemical warfare situation is that the resuscitator unit should have the capability of dealing with a plurality of patients, rathe than a one-on-one situation, as with the existing commer ⁇ cial units. That is, one-on-one resuscitators are labor intensive which will try, if not exhaust, the medical system's manpower resources.
  • respirato medicaments as, for example, aerosol atropine
  • respirato medicaments as, for example, aerosol atropine
  • the medicament be supplied in the system only during such time as the patient is being supplied with fresh air under pressure, as distinguished from other times when stale air is expelled from, the patient's lungs.
  • atropine in addition to its systemic effect is
  • OM important, since it promotes oxygenization by drying secretions and relieving bronchoconstriction. Its effect on the lungs can be expected to be maximal if atropine can be given in a manner that provides a high local concentration at the bronchi and mucous secreting areas of the patient's airway.
  • An important capability of an apparatus suitable for chemical warfare usage is the ability to continually monitor the patient's airway pressure as an indicator of incipient or already developed broncho- construction. Of additional significance is the provision of suction suitable to remove mucous and other secretions which can cause airway blockage.
  • the apparatus preferably embodies a four-station resuscitator unit which is electrically driven either by a suitable source of AC or DC electricity or a battery, and alternatively manually driven when an electrical power- source is unavailable.
  • the resuscitator unit preferably embodies a plurality of positive displacement air chamber assemblies which are moved by a cam track through repetitive cycles, each of which includes an expanded movement and a retracted movement during a time period of less than one-half of the time period of the entire cycle. Each air chamber assembly is connected with a fresh air inlet valve through 4 .
  • valved air line or conduit leading to a face mask assembly through which air passes during each retracted movement of the associated air chamber assembly to supply fresh air into the lungs of the patient and a stale air exhaust valve for permitting air expelled from the lungs of the patient to be exhausted to atmosphere through the associated face mask assembly.
  • the conduit leading to each face mask assembly has provided therein an assembly for injecting a dosage of aerosol medicament, such as atropine, into the conduit and either an indicator or an automatic mechanism is provided for insuring that the medicament dosage will be injected into the conduit only during the minor time portion of each cycle during which fresh air is being supplied to the lungs of the associated patient, thus insuring effective utilization of the medicament.
  • a dosage of aerosol medicament such as atropine
  • Another preferred capability which is embodied in the present apparatus in accordance with the principles of the present invention is the provision of an air suction pump, which communicates through a liquid trap or mucous collector with an air suction line extending through each face mask so as to provide the capability of accommodating mucous and other secretions which tend to block the patient's airway.
  • the need to use such suction can be diminished by effective utili ⁇ zation of respiratory medicaments, particularly atropine, since atropinization tends to promote oxygenization by drying secretions and relieving bronchoconstriction.
  • the apparatus of the present invention provides a pressure gauge for each face mask assembly conduit.
  • Another object of the present invention is the provision of an apparatus of the type described, which is simple in construction, effective in operation and economical to manufacture and maintain.
  • Figure 1 is a top plan view with certain parts broken away for purposes of clearer illustration of a plural patient resuscitator apparatus embodying the principles of the present invention
  • Figure 2 is a front elevational view of the apparatus shown in Figure 1 with certain parts broken away for purposes of clearer illustration;
  • Figure 3 is an enlarged fragmentary vertical sectional view taken along the line 3-3 of Figure 1 showing the cam track mechanism moving the same into a fully retracted position;
  • Figure 4 is a fragmentary side elevational view with parts broken away for purposes of clearer illustration showing the communication of the air delivered by one of the bellows assemblies of the apparatus to the associated face mask assembly;
  • Figure 5 is a development of the cam surface of the cam track
  • Figure 6 is an enlarged fragmentary sectional view taken along the line 6-6 of Figure 1;
  • Figure 7 is an enlarged fragmentary sectional view taken along the line 7-7 of Figure 4;
  • Figure 8 is a schematic wiring diagram illustrating a modified form of electrical circuitry for automatically actuating the medicament injecting assembly at the proper time within the respiratory cycle;
  • Figure 9 is a fragmentary schematic wiring diagram illustrating a modification of the electrical circuitry shown in Figure 8 for automatically actuating the medicament injecting assembly at the proper time within the respiratory cycle in response to the sensing of a predetermined pressure condition within the respiratory system, of the patient.
  • OMPI Referring now more particularly to the drawings there is shown therein an apparatus, generally indicated at 10, for resuscitating four patients simultaneously which embodies the principles of the present invention. It will be understood that while the number of patients which can be resuscitated by the use of the apparatus is shown to be four, the number could be two, three or more than four, with four being considered preferable.
  • the apparatus 10 includes four face mask assemblies (of which only one is shown) , generally indicated at 12. Each face mask assembly 12 is connected by a valved conduit assembly, generally indicated at 14, to a central resuscitator unit, generally indicated at 16.
  • the resuscitator unit 16 may be a pressurized fluid actuated system, as for example, a system such as commercialized under the name Pneupak by Pneupak Limited of London, England.
  • the unit is one which is suitable to be alternatively driven by an electrical power source or operated manually in the event that an electrical power source is not available under emergency conditions.
  • the preferred resuscitator unit 16 includes a frame or housing assembly, generally indicated at 18, which carries four bellows assemblies 20 for repetitive cycles of retracted and expanded movements by a movable or rotatable cam track assembly 22.
  • Each bellows assembly 20 is connected with an associated valved conduit assembly 14 so that during each expanded movement of each bellows assembly 20 fresh air is drawn therein and during each retracted movement of each bellows assembl 20 air is delivered or supplied through the associated conduit assembly 14 to the associated face mask assembly 12 in such a way as to enter the lungs of a patient operatively connected with the associated face mask assembly 12.
  • Each valved conduit assembly 14 functions to enable the lungs of the patient to be expelled of stale air during the portion of each cycle of the associated bellows assembly 20 when the air is not being supplied.
  • the portion of the cycle during which air is supplied takes place during a time period which is less than half of, or a minor part of the total time period of each cycle.
  • each valved conduit assembly 14 has embodied therein a medicament aerosol injecting assembly, generally indicated at 24, and a pressure gauge 28 suitably connected to indicate the pressure within the conduit assembly adjacent each one of the four face mask assemblies 12.
  • each valve conduit assembly 14 also has asso ⁇ ciated therewith a suction line connected with a suitable source of suction so as to enable the operator to remove mucous and other secretions which may tend to interrupt the flow of air necessary to the resuscitating operation being carried out.
  • the frame includes upper and lower horizontally extending frame plates 44 and 46. In the embodiment shown these frame plates are fixedly secured in vertically spaced relation by three corner struts or posts 48 and four side posts 50. In the embodiment shown, the sides of the frame are open. It will be understood
  • MPI that panels may be provided to enclose the sides if desired. Such side panels are eliminated from the drawings for the purpose of simplicity.
  • a rotatable vertically extending shaft 52 is mounted within the central portion of the frame assembly 18.
  • Shaft 52 is suitably journaled, as by upper and lower bearing assemblies 54 and 56, to the central portion of the upper plate 44 and lower plate 46 respectively.
  • upper and lower bearing assemblies 54 and 56 the upper end of the shaft 52 extends above the upper plate 44 and is connected with the output shaft of a clutch assembly 58.
  • Clutch assembly 58 is preferably any well-known commercial embodiment of an overrunning clutch assembly operable when power driven to engage two shaft sections and when manually overrun to disengage the same.
  • the output shaft section of the clutch assembly 58 is connected with the shaft 52 as aforesaid while the input shaft thereof is connected with a gear reducer 60 which, in turn, is driven by the output shaft of an electric motor 62.
  • Clutch assembly 58 may also be of any well known commercial embodiment of a clutch assembly which is electrically energized in conjunction with the energization of the motor to engage the output shaft of the gear reducer to the shaft 52 and when de-energized along with the electric motor 62 to disengage the shaft of the gear reducer 60 from the shaft 62 so as to permit the same to be turned manually.
  • the manual turning action is accomp ⁇ lished by means of a hand crank 64 detachably mounted on the upper end of a shaft 66 suitably journaled between the four corners of the frame plates 44 and 46 where corner posts 48 are not mounted.
  • a motion transmitting mechanism 68 is provided between the corner shaft 66 and
  • the motion transmitting mechanism 68 may assume any desired form. As shown, it is a simple sprocket chain and sprocket drive.
  • the cam track assembly 22 is in the form of a rotary cam track structure 70 of generally cylindrical exterior configuration having a flanged upwardly facing cam track surface 72 formed along the upper exterior periphery thereof.
  • the cam track surface consists essentially of a first semisinuous or half sine wave portion having an angular extent of approximately 120°, a second semisinuous or half sine wave portion having an angular extent of approximately 220°, and a dwell portion of approximately 20°.
  • the first semisinuous portion defines a simple harmonic motion representing the retracted move ⁇ ment of the associated bellows assembly 20 and the second portion represents a simple harmonic motion of expanded movement of the associated bellows assembly 20.
  • the portion representing the retracted movement of the associated bellows assembly is approximately 120° or a one-third portion of the entire cycle in terms of degrees or time assuming a uniform rotational movement.
  • the cam track surface could be divided into a dwell portion and a simple harmonic motion portion, or the cam track surface may include a semisinuous curvature for the retracted movement within the initial 120 ® , with the other 240° being a semisinuous curve of a frequency twice that of the first semisinuous curve.
  • the 120° portion which is operable to accomplish the retracted movement of the associated bellows assembly is represented by the portion indicated by brackets.
  • cam track structure 70 is also shown as including a switch actuated project ⁇ ing surface 74 which may be provided for a purpose hereinafter to be more fully explained.
  • the cam track structure 70 cooperates with four cam follower assemblies 78, each of which includes a hollow cylindrical member 80 having a roller 82 journaled outwardly from one side thereof which rollingly engages the cam track surface 72.
  • Each member 80 extends vertically in a parallel direction in relation to the shaft 52 and has its hollow interior slidably mounted on a shaft 84 fixed on the lower housing plate 46.
  • a coil spring 85 is connected between the outer end portion of member 80 and the lower plate 46 so as to resiliently urge the member downwardly so that the asso ⁇ ciated roller 82 thereof is biased to engage the cam track surface 72.
  • a vertically movable stroke adjusting member 86 is mounted on each side post 50 in a position to engage the bottom of a plate 88 fixed to the upper end of the associated member 80.
  • Each plate 88 forms a part of the associated bellows assembly 20 which also includes an annular accordian folded flexible bellows member 90 having its lower fold suitably fixed to the upper surface of the associated plate 88.
  • Each bellows member 90 is preferably of rectangular configuration with rounded corners and has its upper fold suitably sealingly secured
  • Each adjusting member 86 is moved vertically into a desired position of adjustment by a shaft 92 suitably journaled between the upper and lower frame plates 44 and 46.
  • Each shaft 92 is threaded between its ends and is engaged within an interiorly threaded opening extending through the associated adjusting member 86 so that the latter is moved vertically in response to turning movements of the shaft.
  • the turning movement of each shaft 92 is facilitated by the provision of a manually engageable knob 94 on the end thereof extending above the upper frame plate 44.
  • a pair of nuts 96 may also be threadedly mounted on each shaft 92 on opposite sides of the associated member 86 to limit the extent of adjustment thereof.
  • each valved conduit assembly 14 includes an L fitting 100, one end of which is adapted to communicate with the interior of associated bellows member 90.
  • the upper end of each bellows member 90 is fixed to the upper plate 44 by an apertured plate 102 over which each bellows member 90 extends with each bellows member providing an upper annular inturned flange 104 which is engaged between the upper plate 44 and the apertured plate 102 (see Figure 3) .
  • Formed in the upper plate 44 is a vertical opening 106 suitably grooved to receive an O-ring seal 108.
  • the opening 106 and O-ring seal 108 are sized to receive and seal against the exterior periphery of an output pipe 109 of a filter cartridge 110 which pipe 109 also extends through a registering " opening in the plate 102 so as to communicate with the interior of the associated bellows.
  • Each pipe 109 has a check valve 112 mounted therein for permitting flow of air through 13.
  • Each valve conduit assembly 14 also includes a section of flexible conduit 116 con ⁇ nected with check valve 114 or with the end of the L fitting 100 in which the check valve 114 is mounted. As shown, the opposite end of each conduit section 116 leads to the medicament injecting assembly 24.
  • each medica ⁇ ment injection assembly 24 includes an inverted T-shaped tubular section 118 having an opening 120 in the upper end of the ste thereof.
  • Projection 122 has a central opening 124 extending downwardly therein terminating at its forward edge in an abutment 126 and at its rearward portion with an L-shaped opening which terminates in a discharge orifice 128 aligned axially with the tubular section 118.
  • an aerosol medicament container 130 having a tubular valve stem 132 extending therefrom of a size to engage within the central opening 124 in the projection 122.
  • the container 130 is detachably sealed within the T-shaped section 118 for vertical movement as by a bellows structure 133.
  • the container 130 with its valve stem 132 is constructed in accordance with the teachings contained within ' U.S. patent No. 2,968,427, the disclosure of which is hereby incorporated by reference into the present specification.
  • a commercial embodiment of the same is marketed under the trademark MEDIHALER® by Riker Laboratories, Inc.
  • the container 130 includes an amount of a suitable respiratory medicament, as for example, atro- pine, which is equal to a multiplicity of dosages.
  • the outlet or downstream end of the tubular section 118 is connected with a second conduit section 134 within which is mounted a pressure relief valve 136.
  • the pressure relief valve 136 may be of any suitable design and preferably is one of those commercially available suitable to relieve the pressure within the associated conduit assembly by opening to atmosphere when a pressure equivalent to approximately 65 cm of water is reached.
  • Conduit section 134 leads to a stale air exhaus valve assembly 138.
  • Valve assembly 138 is also prefer ⁇ ably of known design, the exemplary embodiment shown is illustrated somewhat schematically in " Figures 4 and 7 as including a housing having a tubular inlet 140 which is connected with the conduit section 134.
  • Inlet 140 leads to a pair of cooperating flap valve elements 142 which are normally biased together but are capable of being moved apart when pressure is communicated with the inlet 140.
  • flap valve elements 142 When the flap valve elements are moved apart their exterior surfaces engage a pair of valve seats 144 which lead to an annular chamber 146 provided by the housing.
  • the housing of the valve assembly also includes an outlet 148 which communicates with the central portion of the flap valves 142 downstream of the valve seats 144 and is adapted to engage and seal within an adaptor 149 which, in turn, is sealed within an open ⁇ ing 150 in the face mask assembly.
  • Annular chamber 146 includes exhaust openings 152 which are closed by an annu ⁇ lar flap 154 forming with the associated annular portion of the housing defining the opening 152 an exhaust check valve.
  • face mask assembly as herein utilized comprehends within its meaning a simple face mask of the type suitable to fit over the mouth and nose area of a wearer such as is utilized in emergency treatments or it may be a more elaborate arrangement such as embodied in conventional gas masks.
  • An exemplary embodiment of an emergency type face mask is the one marketed as a part of the Esophogeal Airway ⁇ manufactured by Brunswick Manufacturing Company, Inc., and distributed by the assignee company of the present application.
  • the salient features of the Brunswick product are disclosed in U.S. patents No. 3,683,908 and No. 3,841,319.
  • the face mask assembly 12 includes a face mask element 156 which contains opening 150 in the central portion thereof, the face mask element 156 having an air actuated peripheral seal 158 extending therearound so as to provide a seal for the face of the wearer.
  • the face mask is provided with a harness 159 enabling the operator to operatively connect the same with the patient in retained relation.
  • the face mask may be used with an optional esophogeal obturator tube 160, such as disclosed in the aforesaid patents, for the purpose of insuring against regurgitation of the contents of the stomach of the patient while providing for an unobstructed airway for the patient through the face mask.
  • Each valve conduit assembly 14 also includes a pressure sensing line 162 which extends through the condui adaptor 149 at a position adjacent the associated face mask so as to sense the pressure condition therein. The opposite end of each line 162 is communicated with the pressure gauge 28.
  • Each conduit assembly 14 also has associated therewith a suction line 164. Suction line 164 extends through the face mask element 156 in sealed relation therewith so as to be in a position within the interior of the face mask to be disposed within the throat of the patient and provide for suction of mucous or other secretions which may accumulate therein and tend to provide a block to the flow of air to and from the patient's lungs.
  • Each suction line 164 leads to a liquid trap 166 suitably carried on the main frame assembly 18 of the resuscitator unit -16. Extending from the liquid trap 166 is a suction pump line 168 which, in turn, extends to the interior of a suction pump assembly, generally indicated at 170.
  • Suction pump assembly 170 may be of any suitable construction of the type adapted to be power driven. As shown an electric motor 172 is provided to power the pump assembly 170. It will be understood that other suction sources may be pro ⁇ vided if desired including suction sources capable of manual operation or alternative manual or power operation.
  • evacuation of the liquid trap 166 serves to create a suction in each of the suction lines 164 connected in parallel. It can be seen that by providing a single pump assembly 170 connected with a single liquid trap 166, a continuous suction source or supply is available to each of the suction lines 164 at all times.
  • Figure 8 illustrates a modification for replacing the manual actuation of the medicament injecting assemblies
  • FIG. 8 illustrates the automatic circuitry for one medicament injecting assembly 24, it being understood that the circuitry shown can be triplicated for the other three medicament injecting assemblies 24.
  • a solenoid plunger 192 is mounted in a position to operate the medicament injecting assembly 24 when an associated solenoid coil 194 is energized.
  • a manually actuated switch 196 is provided which is normally spring biased into an open position and is connected so that when it is manually closed a circuit is completed across a power source 198 through a coil 200 of a latched relay having two normally open switches 202 and 204.
  • Normally open switch 202 when closed provides a holding circuit for the relay coil 200 and is connected in a circuit capable of short circuiting the switch 196 in series with a normally closed switch 206 of a reset relay having a coil 208.
  • Normally open switch 204 of the latched relay is connected across the power source 198 in series with solenoid coil 194, a normally open cam actuated switch 210, and the coil 208 of the reset relay.
  • Switch 210 replaces light switch 76 previously described.
  • Switch actuating structure 74 previously described is preferably shortened so as to close the switch 210 only during the initial 50% of the associated bellows assembly 12 retracted movement which constitutes the optimum time for medicament injection.
  • FIG. 9 there is shown therein a modification of the circuitry illustrated in Figure 8 wherein the selective manual capability of the actuating switch 196 is replaced by an automatic actuating capability responsive to the presence of a predetermined pressure condition within the asso ⁇ ciated face mask assembly 12.
  • a pressure transducer 211 is communicated with each line 162.
  • the electrical output of the pressure transducer 211 is communicated through an amplifier 212 to a level detector or comparator 214.
  • the level detector 214 has a referenc voltage communicated therewith through line 216 so as to provide an electrical output in a line 218 when the voltage from the amplifier 212 is above the reference voltage in line 216.
  • the detected or com ⁇ pared voltage level could be that which would correspond with the electrical output of .the transducer 211 when the pressure in line 162 is 45 cm of water.
  • the electrical output of line 218 is connected with a transistor 220 which is connected in the circuit of Figure 8 in the same manner as manual switch 196.
  • the circuitry shown in Figure 8 may likewise be made up of solid state components rather than the mechanical type components schematically shown therein.
  • the apparatus 10 of the present invention is particularly adapted for use under chemical warfare emergency conditions.
  • it is important to alleviate the symptoms which are induced by nerve agent exposure, such as excessive airway secretions, broncho-constriction, and apnea.
  • the face mask 12 described above is not dis- closed as including the usual shrouds which are usually associated with gas masks. It will be understood that such a shroud could be readily provided or alternatively 19 .
  • the face mask assembly 12 could be replaced by a conventional gas mask assembly.
  • Connection to the conventional gas mask may be effected in a variety of different ways depending upon whether or not the gas mask assembly is of a type in which the air intake filter " is on the exterior or interior of the gas mask. Where the air inlet is on the exterior, one simple method of-attaching the present valve conduit assembly 14 therewith is to provide a T connection with the adaptor 149 downstream of the stale air exhaust valve assembly 138 and connecting one branch of the T over the exhaust valve of the gas mask and the othe 9r over the second inlet of the gas mask which is not in use by having an inlet filter connected therewith.
  • the exhaust valve assembly of the gas mask can be removed and the adaptor 149 of the conduit assembly 14 connected therewith.
  • a mucous suction line 164 and an esophogeal obturator tube 160 are provided for use in the alternative. That is, where conditions permit the installation of the obturator tube 160 within the patient the suction line can be dispensed with. On the other hand, 20.
  • the obturator tube 160 can be suitably eliminated.
  • the initial procedure in the operation of the apparatus 10 is to connect the patient operatively with the face mask assembly 12.
  • the unit 16 is preferably operated by a source of AC current suitably energizing the electric motor " 62 through an appropriate rectifier or alternatively by a battery. Where a source of electricity is not available, crank 64 may be turned to effect the operation of the resuscitator unit 16.
  • valve seats 144 When the pressure from conduit assembly 14 is no longer being delivered, the flap valve elements 142 move away from the seats 144 enabling air from the end 148 of the valve assembly 138 to be exhauste to atmosphere past the valve seat 144 and flap valve elements 142, into the chamber 146 and out of the exhaust openings 152 through the check valve 154.
  • the cam track surface 72 is shaped with respect to the capacity of each bellows assembly 20 so as to provide a tidal volume during each retracted movement of approximately 900 ml.
  • the 900 ml is exemplary and the actual tidal volume provided may vary within a range of
  • a preferred setting for the limiting nuts 96 is one which provides a range of 600 ml to 900 ml.
  • the motor 68 and gear reducer 66 are set to provide a
  • the 16 cycles per minute is exemplary and the actual cycles per minute may vary within the range of 7 to 25 cycles per minute.
  • the shape of the cam surface 72 is such that the time for the retracted movement is approximately 33-1/3% of the total cycle time.
  • the 33-1/3% of the total cycle time is exemplary and the actual percentage may vary withi the range of 25% to 50%.
  • the tidal volume per cycle can be reduced with a commensurate reduction in the 33-1/3% during which the retracted movement takes place.
  • the relief valve assembly 136 within each conduit assembly 14 is preferably set to limit or prevent the pressure within the conduit assembly from exceeding a value of 65 cm of water.
  • the operator manually actuates the associated medicament injecting assembly 24 by pressing down on the top of the bellows 133 which has the effect of moving the container 30 downwardly with respect to the valve stem 132 disposed against stop 126. This movement releases a single measured dosage of aerosol medicament from the valve stem 132 which passes outwardly of the orifice 128 into the center of the downstream branch of the T fitting 118.
  • solenoid coil 194 also energizes the series connected coil 208 of the reset relay which has the effect of disrupting the holding circuit for the latched relay 200.
  • solenoid coil 194 will not be energized due to the associated cam operated switch 210 being open.
  • the latched relay is latched or held in an energized condition by virtue of the holding circuit associated with the reset relay so that during the onset of the next retracted movement of the associated bellows assembly 20 switch 210 will be closed, thus energizing the solenoid coil 194 and effect- ing operation " of the medicament injecting assembly 24 in the manner previously described. It can thus be seen that with the arrangement shown in Figure 8 , the operator in order to achieve the injection of a single dosage of medicament in proper timed relation need only depress the button 196 momentarily and the dosage will be delivered at the onset of the delivery of air to the patient's lungs.
  • O PI in line 216 communicated with comparator 214 so that the output in line 218 thereof causes the transistor 220 to complete the circuit of Figure 8 in the same way that the circuit of Figure 8 is completed by closing manual switch 196.
  • freshness air contemplates either uncontaminated atmospheric air, contaminated atmo ⁇ spheric air which has been filtered, bottled air, or a bottled air substitute such as bottled oxygen. It thus will be seen that the objects of this invention have been fully and effectively accomplished. It will be realized, however, that the foregoing pre ⁇ ferred specific embodiment has been shown and described for the purpose of illustrating the functional and structural principles of this invention and is subject to change without departure from such principles. There ⁇ fore, this invention includes all modifications encom ⁇ passed within the spirit and scope of the following claims.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Veterinary Medicine (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Emergency Medicine (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

L'unite de reanimation (10) possede une pluralite d'assemblages a soufflet (20) actionnes de maniere cyclique par un moteur (62) par l'intermediaire d'un train d'entrainement (52, 58, 60) pour envoyer de l'air pressurise au travers d'une pluralite de conduites (14) a clapet aux masques associes (12) pour la reanimation simultanee de plusieurs patients.
PCT/US1982/000795 1981-06-12 1982-06-11 Dispositif de reanimation a etages multiples Ceased WO1982004386A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US27297281A 1981-06-12 1981-06-12
US272972 1981-06-12
US06/383,962 US4452241A (en) 1982-06-01 1982-06-01 Plural station resuscitator
US383962820601 1982-06-01

Publications (1)

Publication Number Publication Date
WO1982004386A1 true WO1982004386A1 (fr) 1982-12-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1982/000795 Ceased WO1982004386A1 (fr) 1981-06-12 1982-06-11 Dispositif de reanimation a etages multiples

Country Status (6)

Country Link
EP (1) EP0081572A4 (fr)
JP (1) JPS58500889A (fr)
AU (1) AU549962B2 (fr)
CA (1) CA1187374A (fr)
IT (1) IT1151637B (fr)
WO (1) WO1982004386A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0266963A3 (fr) * 1986-11-04 1988-11-23 Bird Products Corporation Valve d'exhalation pour respirateur
US5072729A (en) * 1986-11-04 1991-12-17 Bird Products Corporation Ventilator exhalation valve
EP0680769A1 (fr) * 1994-05-05 1995-11-08 Bioms S.A. Ventilateur à usage médical
EP0835671A1 (fr) * 1996-10-11 1998-04-15 Georges Boussignac Appareil d'assistance respiratoire

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2770232A (en) * 1954-05-26 1956-11-13 Smith Welding Equipment Corp Respirator system
US2924215A (en) * 1958-01-22 1960-02-09 Stephenson Corp Double bellows controlled respiration unit
US3467094A (en) * 1966-02-01 1969-09-16 Us Navy Oxygen-isolation and overboard-dumping system
US3523527A (en) * 1966-02-24 1970-08-11 Watson W & Sons Ltd Electronically controlled variable mode respirator
US3789837A (en) * 1970-12-11 1974-02-05 J Liddall Automatic therapeutic ventilator
US3918317A (en) * 1972-11-08 1975-11-11 Kinzler Georg Apparatus for artificial respiration
US4262667A (en) * 1978-08-24 1981-04-21 Grant Graham C Ventilator for use in medical applications

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2770232A (en) * 1954-05-26 1956-11-13 Smith Welding Equipment Corp Respirator system
US2924215A (en) * 1958-01-22 1960-02-09 Stephenson Corp Double bellows controlled respiration unit
US3467094A (en) * 1966-02-01 1969-09-16 Us Navy Oxygen-isolation and overboard-dumping system
US3523527A (en) * 1966-02-24 1970-08-11 Watson W & Sons Ltd Electronically controlled variable mode respirator
US3789837A (en) * 1970-12-11 1974-02-05 J Liddall Automatic therapeutic ventilator
US3918317A (en) * 1972-11-08 1975-11-11 Kinzler Georg Apparatus for artificial respiration
US4262667A (en) * 1978-08-24 1981-04-21 Grant Graham C Ventilator for use in medical applications

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0266963A3 (fr) * 1986-11-04 1988-11-23 Bird Products Corporation Valve d'exhalation pour respirateur
US5072729A (en) * 1986-11-04 1991-12-17 Bird Products Corporation Ventilator exhalation valve
EP0680769A1 (fr) * 1994-05-05 1995-11-08 Bioms S.A. Ventilateur à usage médical
FR2719484A1 (fr) * 1994-05-05 1995-11-10 Bioms Sa Ventilateur à usage médical.
EP0835671A1 (fr) * 1996-10-11 1998-04-15 Georges Boussignac Appareil d'assistance respiratoire
FR2754457A1 (fr) * 1996-10-11 1998-04-17 Boussignac Georges Appareil d'assistance respiratoire
US5964220A (en) * 1996-10-11 1999-10-12 Boussignac; Georges Respiratory assistance apparatus

Also Published As

Publication number Publication date
IT1151637B (it) 1986-12-24
EP0081572A4 (fr) 1984-02-09
JPS58500889A (ja) 1983-06-02
EP0081572A1 (fr) 1983-06-22
IT8221822A0 (it) 1982-06-11
AU8734882A (en) 1983-01-04
CA1187374A (fr) 1985-05-21
AU549962B2 (en) 1986-02-20

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