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
  • A61M16/04—Tracheal tubes
• • 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
  • A61M16/04—Tracheal tubes
  • A61M16/0402—Special features for tracheal tubes not otherwise provided for
  • A61M16/0409—Special features for tracheal tubes not otherwise provided for with mean for closing the oesophagus
• • 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
  • A61M16/04—Tracheal tubes
  • A61M16/0434—Cuffs
  • A61M16/0445—Special cuff forms, e.g. undulated
• • 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
  • A61M16/04—Tracheal tubes
  • A61M16/0434—Cuffs
  • A61M16/045—Cuffs with cuffs partially or completely inflated by the respiratory gas
  • A61M16/0452—Cuffs with cuffs partially or completely inflated by the respiratory gas following the inspiration and expiration pressure
• • 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
  • A61M16/04—Tracheal tubes
  • A61M16/0434—Cuffs
  • A61M16/0454—Redundant cuffs
  • A61M16/0456—Redundant cuffs one cuff within another
• • 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
  • A61M16/12—Preparation of respiratory gases or vapours by mixing different gases
• • 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
  • A61M16/12—Preparation of respiratory gases or vapours by mixing different gases
  • A61M16/122—Preparation of respiratory gases or vapours by mixing different gases with dilution
  • A61M16/125—Diluting primary gas with ambient air
  • A61M16/127—Diluting primary gas with ambient air by Venturi effect, i.e. entrainment mixers

Definitions

• the present invention relates to a respiratory assistance device, which can advantageously be used as an artificial respiration device during the resuscitation of a person in a state of cardiac arrest.
• a tubular respiratory assistance device is already known for patients whose breathing, although occurring spontaneously, is insufficient.
• a known respiratory assistance device comprises:
• tubular element which forms a main channel and which is intended to be connected by its distal end to a respiratory tract of a patient, while the proximal end of said tubular element is outside said patient and that the system its respiratory tract is externally connected through said main channel;
• peripheral auxiliary channels which open into said main channel, said auxiliary channels being supplied with breathing gas
• - Deflection means to converge to each other, within said main channel, the respiratory gas jets injected by said auxiliary channels.
• the patient is ventilated by said jets of breathing gas.
• such a tubular respiratory assistance device is provided so that it can be introduced, through its distal end, into the patient's mouth and pushed until said distal end is in the vicinity of the lungs. the highest the hull, said respiratory assistance device then passing through the larynx and the trachea.
• this breathing aid device for a patient with spontaneous breathing can be used successfully as an artificial respiration device (and no longer only as a respiratory assistance device) on people in the off state.
• the object of the present invention is therefore to improve this known device, recalled above, to facilitate implementation.
• the tubular respiratory assistance device which forms a main channel connecting the proximal end and the distal end of said device and said distal end is intended to be introduced into the mouth of a patient. patient towards the lungs thereof, while said proximal end is intended to remain outside the mouth of said patient, said device comprising: - At least one auxiliary channel opening into said main channel in the vicinity of said distal end and for injecting into said main channel, a breathable gas jet; and
• means for the deflection, inwardly of said main channel, of said jet of breathable gas injected by said auxiliary channel is remarkable in that it comprises sealing means surrounding said distal end and capable of ensuring, at the level of of the pharynx of said patient, a gaseous communication at least substantially sealed between the trachea of said patient and said main channel of the device.
• said sealing means comprise at least one bead having an annular shape adapted to surround the larynx of the patient and inflatable under the action of an inflation gas supplied to said device.
• said inflatable bead can easily be introduced into the patient's mouth and pharynx in the deflated state, and then inflated once in place.
• said inflation gas is fed to said coil through at least one channel formed in the thickness of said device.
• said sealing means comprises two annular-shaped strands, one of which is disposed inside the other and which is capable of surrounding the larynx of said patient, one of said strands being inflatable under the action of said inflation gas supplied to said device and the other being in gaseous communication with said distal end of the device downstream of said deflection means.
• said inflation gas may have a lower pressure than that required for a good seal, the pressure supplement for sealing being provided by the breathable gas jet through said gas communication.
• Said bead in gaseous communication with the distal end of the device may be disposed inside or outside said inflatable bead under the action of said inflation gas.
• said sealing means are carried at the flared periphery, truncated at an angle, of a trumpet-shaped piece, adapted to be attached, for example by interlocking, to said distal end of the respiratory assistance device. Fixing said piece on the latter may be temporary or permanent.
• Figure 1 is a schematic and partial view, in axial section, of an embodiment of the device of the invention.
• Figures 2 and 3 are cross sections, respectively along the lines II-II and IH-III of Figures 1, 7 and 8.
• FIG. 4 is a schematic view of the sealing means of the device of the invention, along the arrow IV of FIG. 1.
• FIG. 5 is a schematic cross-section of said sealing means along the line V-V of FIG. 4.
• Figure 6 schematically illustrates the implementation of the device according to the invention.
• Figure 7 illustrates schematically, in a view similar to Figure 1, an alternative embodiment of said sealing means.
• Figure 8 schematically illustrates, also in a view similar to Figure 1, yet another alternative embodiment of said sealing means.
• FIG. 1 the only proximal 2 and distal ends 3 of an embodiment 1 of the device according to the invention are shown schematically and on a large scale.
• the device 1 comprises a tube 4, flexible (or preformed to adapt to the morphology of the patient) delimiting a main channel 5 opening, through the orifice 6, to the proximal end 2 and, through the orifice 7, to the distal end 3.
• the main channel 5 is capable of ensuring the passage between the orifices 6 and 7, one of which (the distal orifice 7) is intended to be inside the respiratory tract of a patient, and the other (the proximal orifice 6) is intended to be outside said patient.
• This proximal orifice 6 can open into the open air and, in this case, the patient can breathe in fresh air and exhale the stale air through the main channel 5 (one could also connect the orifice 6 to a source of breathable pressurized gas and provide a system of unidirectional valves, so that the patient inhales the breathable gas from said source through said main channel 5 and expires stale air in the open air, also through this main channel).
• the diameter of the main channel 5 is of the order of a few millimeters. Satisfactory tests were carried out with diameters of 3 mm, 7 mm, 8 mm and 12 mm.
• auxiliary channels 8 extending over almost the entire length of the main channel 5 and intended to be connected to a source of breathable gas under pressure, such as this is described below.
• the connection to the source of breathable gas under pressure can be achieved by means of a ring 9, sealingly surrounding the tube 4, on the side of the proximal end 2, and delimiting a sealed annular chamber 10 around said tube.
• the auxiliary channels 8 are placed in communication with the chamber 10, thanks to local detachments 1 1 of the wall of the tube 4, and said chamber 10 is connected to said source of breathable gas via a conduit 12.
• the proximal ends channels 8 are closed, for example by plugs 13, introduced from the proximal end face of the tube 4.
• the auxiliary channels 8 have a diameter smaller than that of the main channel 5.
• the diameter of the auxiliary channels 8 is preferably less than 1 mm and, advantageously, it is of the order of 400 to 800 microns.
• the auxiliary channels 8 open into a recess 14 of the inner wall 15 of the tube 4.
• the recess 14 is annular and centered on the axis 16 of the distal end 3. It has a face 14a, substantially transverse or slightly inclined so as to constitute a flare of the main channel 5, into which said auxiliary channels 8 open through their orifices 17, and a face 14b along the face 14a and converging towards the axis 16.
• auxiliary channels 8 are supplied with pressurized breathable gas through the elements 9 to 12, the corresponding gaseous jets strike the inclined face 14b, which deflects them in the direction of the axis 16 (see the arrows in FIG. at the outlet of the orifices 17), generating inside the distal end 3 of the main channel 5 an oblong shaped pressure zone originating at said distal orifices 17 and extending towards the distal orifice 7 along of the axis 16 of said distal end 3.
• the cross section of this pressure zone decreases progressively from the recess 14 to the distal orifice 7, said pressure zone progressively deviating from the inner wall 15 of the tube 4 to occupy only the central portion of the distal end 3 of the latter.
• the jets of deflated breathable gas Downstream of the pressure zone, the jets of deflated breathable gas generate, in the vicinity of the axis 16, a zone of depression favoring gas circulation inside the main channel 5, from the proximal orifice to the distal orifice. This encourages the patient's inspiration.
• the auxiliary channels 8 are regularly disposed about the axis of the tube 4. Their number varies depending on the uses (adult or child), but it is generally between three and nine.
• the tube 4 of the device according to the invention can be made of any material already used in respiratory probes, for example a polyvinyl chloride, with a possible silicone coating.
• Additional channels 20 are provided in the thickness of said tube 4. These channels 20 may be used for different purposes, such as injecting a fluid medicine, taking pressure, collecting gaseous samples (as indicated symbolically by the arrow f lying opposite a channel 20 at the bottom of Figure 1) and, as will be described below, inflation of sealing bead. It should be noted that in FIG. 1, to simplify the drawing, channels 8 and channel portions 20 have been shown, although these channels are located in different planes (see FIGS. 2 and 3).
• an inflatable ring 21, ring-shaped and carried to the periphery 22 of a piece 23 is reported.
• the piece 23 presents the at least approximate shape of a trumpet and is fitted by its small end on the distal end 3 of the tube 4.
• the flared end of the piece 23 is truncated at an angle, so that said periphery 22 and the inflatable bead 21 it bears, are inclined relative to the axis 16 of the distal end 3.
• the coil 21 is adapted, after inflation by an inflation gas G brought from a source (not shown) to the device 1 , then transmitted to the coil 21 through a channel 20, to surround the larynx 28 and to provide a gas communication at least substantially sealed between the trachea 29 of the patient 25 and the main channel 5 of the device 1 (see Figure 6).
• the flange 21 partially closes the esophagus 30.
• FIGS. 7 and 8 show, in similar views to FIG. 1, the device 1 provided with sealing means that is little or no traumatising for the mucous membranes of the pharynx 27 of the patient 25.
• FIGS. 7 and 8 found all the elements shown in Figure 1 and described next to it.
• the annular bead 21, inflatable by the inflation gas G contains another annular bead 31 connected by a gas communication 32 with the inside of the part 23, that is to say with the end distal 3 of the device 1 downstream of the deflection means 14b.
• annular flange 21 is contained in another annular flange 33, also connected to the inside of the part 23 by a gas communication 34.
• the flanges 31 and 33 are inflated during the injections of the breathable gas through the channels 8, while they are not inflated between the injections.
• the pressure of the inflation gas G can be chosen at a level lower than that required for the bead 21 alone to ensure the sealing, since during the injections, this lower pressure level will be supplemented by the pressure at the same time. inside the rolls 31 or 33.
• the sealing means 21, 32 and 21, 33 are less traumatic than the single coil 21.
• the respiratory assistance device according to the present invention can be made to be lightweight and transportable, so that it can be used in emergency and first aid, outside a hospital or clinic.

Landscapes

• Health & Medical Sciences (AREA)
• Pulmonology (AREA)
• Emergency Medicine (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)
• Percussion Or Vibration Massage (AREA)
• External Artificial Organs (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=39356573

Family Applications (1)

Country Status (5)

Families Citing this family (7)

Family Cites Families (11)

• 2007
  • 2007-10-08 FR FR0707036A patent/FR2921840B1/fr not_active Expired - Fee Related
• 2008
  • 2008-09-30 EP EP08862711A patent/EP2195060A2/de not_active Withdrawn
  • 2008-09-30 JP JP2010527487A patent/JP2010540141A/ja active Pending
  • 2008-09-30 WO PCT/FR2008/001360 patent/WO2009077667A2/fr active Application Filing
  • 2008-09-30 US US12/680,972 patent/US20100218769A1/en not_active Abandoned

Non-Patent Citations (1)

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