EP4337289A1 - Tube de ventilation à double ballonnet - Google Patents

Tube de ventilation à double ballonnet

Info

Publication number
EP4337289A1
EP4337289A1 EP21868875.2A EP21868875A EP4337289A1 EP 4337289 A1 EP4337289 A1 EP 4337289A1 EP 21868875 A EP21868875 A EP 21868875A EP 4337289 A1 EP4337289 A1 EP 4337289A1
Authority
EP
European Patent Office
Prior art keywords
balloon
laryngeal
proximal
ventilation
pharyngeal
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.)
Pending
Application number
EP21868875.2A
Other languages
German (de)
English (en)
Inventor
Oron Zachar
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.)
Airway Medix Sp zoo
Original Assignee
Airway Medix Sp zoo
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Airway Medix Sp zoo filed Critical Airway Medix Sp zoo
Priority claimed from PCT/IL2021/051108 external-priority patent/WO2022059000A1/fr
Publication of EP4337289A1 publication Critical patent/EP4337289A1/fr
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. 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
    • A61M16/0402—Special features for tracheal tubes not otherwise provided for
    • A61M16/0415—Special features for tracheal tubes not otherwise provided for with access means to the stomach
    • 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
    • A61M16/0459—Redundant cuffs one cuff behind 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
    • A61M16/04—Tracheal tubes
    • A61M16/0434—Cuffs
    • A61M16/044—External cuff pressure control or supply, e.g. synchronisation with respiration

Definitions

  • the present invention relates generally to lung ventilation devices, and specifically to ventilation tubes.
  • Laryngeal tubes are designed to secure a patient airway during anesthesia and cardiopulmonary resuscitation.
  • a laryngeal tube may include a primary inflatable cuff, mask, or elastomeric cuff disposed on its distal end for blocking the esophagus, and a more proximal secondary inflatable or elastomeric barrier for blocking the pharynx.
  • the laryngeal tube further includes a channel to establish fluid communication with the larynx.
  • a dual-balloon ventilation tube that comprises a laryngeal ventilation support, which is shaped so as to define a ventilation port, which is configured to be in fluid communication with a laryngeal inlet of a patient when the laryngeal ventilation support is disposed at an insertion location within a larynx of the patient.
  • the laryngeal ventilation support is ergonomically configured such that when the laryngeal ventilation support is disposed at the insertion location, both of the lateral sides contact laryngeal soft tissue of the larynx so as to provide lateral support that centers and inhibits tilting of the laryngeal ventilation support, such that the ventilation port faces anteriorly.
  • the laryngeal ventilation support has a greatest lateral width of between 2 and 6 cm, measured between lateral sides of the laryngeal ventilation support.
  • the dual-balloon ventilation tube further comprises a shaft having proximal and distal ends.
  • the proximal end is configured to be disposed outside an oral cavity of the patient when the laryngeal ventilation support is disposed at the insertion location, and the distal end supports the laryngeal ventilation support.
  • the dual-balloon ventilation tube further comprises an airway tube, which passes through at least a longitudinal portion of the shaft, and has a proximal end that is configured to be disposed outside the patient's oral cavity when the laryngeal ventilation support is disposed at the insertion location, and a distal end that is in fluid communication with the ventilation port.
  • the dual-balloon ventilation tube further comprises a proximal pharyngeal inflatable balloon, which surrounds a distal portion of the shaft proximal to the laryngeal ventilation support, and which is configured to make an air-tight seal with a pharynx of the patient when the laryngeal ventilation support is disposed at the insertion location.
  • the dual-balloon ventilation tube further comprises a distal esophageal inflatable balloon, which is disposed distal to the laryngeal ventilation support, and which is configured to make an air-tight seal with an esophagus of the patient when the laryngeal ventilation support is disposed at the insertion location.
  • a dual-balloon ventilation tube including: a laryngeal ventilation support, which: is shaped so as to define a ventilation port, which is configured to be in fluid communication with a laryngeal inlet of a patient when the laryngeal ventilation support is disposed at an insertion location within a pharynx of the patient, and has a greatest lateral width of between 2 and 6 cm, measured between lateral sides of the laryngeal ventilation support, such that when the laryngeal ventilation support is disposed at the insertion location, both of the lateral sides contact laryngeal soft tissue of the pharynx so as to provide lateral support that centers and inhibits tilting of the laryngeal ventilation support, such that the ventilation port faces anteriorly; a shaft having proximal and distal ends, the proximal end configured to be disposed outside an oral cavity of the patient when the laryngeal ventilation support is disposed at the insertion location,
  • the greatest lateral width of the laryngeal ventilation support is between 3 and 6 cm.
  • the laryngeal ventilation support along a 1 -cm- long longitudinal portion thereof, has an average lateral width greater than 90% of the greatest lateral width of the laryngeal ventilation support.
  • the greatest lateral width of the laryngeal ventilation support is at least 1.5 times a greatest anterior-posterior height of the laryngeal ventilation support.
  • the greatest lateral width of the laryngeal ventilation support is at least 2 times the greatest anterior-posterior height of the laryngeal ventilation support.
  • respective portions of a perimeter of the laryngeal ventilation support defined by the lateral sides are reflectionally symmetric with each other.
  • a central longitudinal axis of the dual-balloon ventilation tube is defined by a line that passes through a centroid of the distal esophageal balloon and a centroid of the proximal pharyngeal inflatable balloon
  • a projection of the laryngeal ventilation support onto a plane, in which the central longitudinal axis falls is divided by the central longitudinal axis into two lateral sections on either side of the central longitudinal axis 88, and an area of one of the lateral sections includes between 40% and 50% of a total area of the projection.
  • the area of the one of the lateral sections includes between 45% and 50% of the total area of the projection.
  • the laryngeal ventilation support is shaped so as to define an anterior side that is configured to stabilize the laryngeal ventilation support with respect to the laryngeal inlet when the laryngeal ventilation support is disposed at the insertion location.
  • the proximal pharyngeal balloon when unconstrained and inflated at a pressure of 5 cm H2O, has a greatest lateral width that is between 1.2 and 2 times the greatest lateral width of the laryngeal ventilation support.
  • the proximal pharyngeal balloon when unconstrained and inflated at a pressure of 5 cm H2O, has a greatest anterior-posterior height that is between 1 and 2 times a greatest anterior-posterior height of the laryngeal ventilation support.
  • the proximal pharyngeal balloon has a higher-pressure aspect ratio equal to a greatest lateral width of the proximal pharyngeal balloon divided by a greatest anterior- posterior height of the proximal pharyngeal balloon when the proximal pharyngeal balloon is unconstrained and inflated at a pressure of 30 cm H2O
  • the proximal pharyngeal balloon has a lower-pressure aspect ratio equal to a greatest lateral width of the proximal pharyngeal balloon divided by a greatest anterior-posterior height of the proximal pharyngeal balloon when the proximal pharyngeal balloon is unconstrained and inflated at a pressure of 5 cm H2O
  • the higher-pressure aspect ratio is less than the lower-pressure aspect ratio.
  • the higher-pressure aspect ratio is less than 85% of the lower- pressure aspect ratio.
  • the proximal pharyngeal balloon when unconstrained and inflated at a pressure of 5 cc H2O, has a greatest lateral width that is between 1.2 and 2 times a lateral width of the shaft at an interface between the shaft and a proximal end of the proximal pharyngeal balloon.
  • the proximal pharyngeal balloon when unconstrained and inflated at a pressure of 5 cc H2O, has a greatest anterior-posterior distance from the shaft that is between 0 and 5 mm.
  • the proximal pharyngeal balloon when unconstrained and inflated at a pressure of 5 cc H2O, has: a greatest lateral width that is between 1.2 and 2 times a lateral width of the shaft at an interface between the shaft and a proximal end of the proximal pharyngeal balloon, and a greatest anterior-posterior distance from the shaft that is between 0 and 5 mm.
  • the proximal pharyngeal balloon when unconstrained and inflated at a pressure of 5 cc H2O, has a greatest lateral distance from a lateral edge of the shaft that is between 5 and 10 mm, and has a greatest anterior-posterior distance from the shaft that is between 0 and 5 mm.
  • the lateral sides of the laryngeal ventilation support are shaped so as to define respective wings, which are configured to flex toward a central longitudinal axis of the laryngeal ventilation support when squeezed by the laryngeal soft tissue when the laryngeal ventilation support is disposed at the insertion location.
  • the proximal pharyngeal balloon is generally ellipsoidal when unconstrained and inflated at a pressure of 5 cc H2O.
  • the laryngeal ventilation support includes a material having a Shore hardness of between A30 and A90.
  • the proximal pharyngeal balloon when unconstrained and inflated at a pressure of 5 cm H2O, is shaped such that: the proximal pharyngeal balloon has greatest lateral width at a location along the proximal pharyngeal balloon, a line segment having the greatest lateral width extends between opposing lateral sides of the proximal pharyngeal balloon at the location, the proximal pharyngeal balloon has a greatest-width cross-section perpendicular to a central longitudinal axis of the laryngeal ventilation support, and an outer perimeter of the greatest-width cross-section is divided by the line segment into a posterior perimeter portion and an anterior perimeter portion, and a ratio of a length of the posterior perimeter portion to a length of the anterior perimeter portion is between 1.2:1 and 2:1, the lengths measured along the respective perimeter portions.
  • the proximal pharyngeal balloon when unconstrained and inflated at a pressure of 5 cm H2O, is shaped such that: the proximal pharyngeal balloon has greatest lateral width at a location along the proximal pharyngeal balloon, a line segment having the greatest lateral width connects lateral sides of the proximal pharyngeal balloon at the location, the proximal pharyngeal balloon has a greatest-width cross-section perpendicular to a central longitudinal axis of the laryngeal ventilation support, and a ratio of (a) a first greatest distance, in the greatest-width cross-section, between a posterior side of the proximal pharyngeal balloon and the line segment to (b) a second greatest distance, in the greatest-width cross-section, between an anterior side of the proximal pharyngeal balloon and the line segment, is between 1.2:1 and 2: 1.
  • the proximal pharyngeal balloon when unconstrained and inflated at a pressure of 5 cm H2O, is shaped such that: the proximal pharyngeal balloon has greatest lateral width at a location along the proximal pharyngeal balloon, a line segment having the greatest lateral width connects lateral sides of the proximal pharyngeal balloon at the location, the proximal pharyngeal balloon has a greatest-width cross-section perpendicular to a central longitudinal axis of the laryngeal ventilation support, the greatest- width cross-section is divided by the line segment into a posterior cross- sectional portion and an anterior cross-sectional portion, and a ratio of an area of the posterior cross-sectional portion to an area of the anterior cross-sectional portion is between 1.2:1 and 2:1.
  • the dual-balloon ventilation tube further comprises an externally-accessible inflation tube, which has a distal end that is coupled in fluid communication with an interior of the proximal pharyngeal inflatable balloon, and the dual-balloon ventilation tube is configured such that when a volume of 6 cc of ambient air, the volume measured at standard atmospheric pressure, is introduced into the inflation tube while the proximal pharyngeal balloon and the distal esophageal inflatable balloon are unconstrained, disposed in ambient air that is at atmospheric pressure, and is at an inflation pressure of 30 cm H2O: the inflation pressure in the proximal pharyngeal balloon, measured one minute after introduction of the volume of 6 cc of the ambient air, is less than 40 cm H2O.
  • a posterior surface of the laryngeal ventilation support is shaped so as to define at least three elongate grooves.
  • the laryngeal ventilation support is not inflatable.
  • At least 80% of an external surface of the laryngeal ventilation support is not covered by any inflatable balloon.
  • the dual-balloon ventilation tube further includes an externally-accessible inflation tube, which (a) includes an inflation valve that is configured to be disposed outside the patient's oral cavity when the laryngeal ventilation support is disposed at the insertion location, and (b) has a distal end that is coupled in fluid communication with an interior of the proximal pharyngeal inflatable balloon, and the dual-balloon ventilation tube is configured such that when the laryngeal ventilation support, while the inflation valve is closed and a pressure within the proximal pharyngeal inflatable balloon equals ambient pressure, is inserted from outside the oral cavity of the patient to the insertion location without opening the inflation valve, the pressure within the proximal pharyngeal inflatable balloon increases from the ambient pressure to an inserted-location pressure, the inserted-location pressure less than 60 cm H2O.
  • an externally-accessible inflation tube which (a) includes an inflation valve that is configured to be disposed outside the patient's oral cavity when the laryngeal ventilation support is disposed
  • the inserted-location pressure is less than 45 cm H2O.
  • the inserted-location pressure is less than 30 cm H2O.
  • the proximal pharyngeal inflatable balloon and the distal esophageal inflatable balloon are connected in fluid communication.
  • a ventilation tube system includes the dualballoon ventilation tube and further includes an insertion posterior protector, which includes an elongate sheet of material that is shaped so as to define: a proximal coupling portion, which is shaped so as to define one or more couplers that are configured to removably couple the proximal coupling portion to the shaft proximally to the proximal pharyngeal balloon, and a distal protection portion, which is shaped so as to partially cover a posterior external surface of the proximal pharyngeal inflatable balloon when the proximal coupling portion is removably coupled to the shaft, so as to protect the proximal pharyngeal balloon from puncture during insertion thereof into the patient's oral cavity.
  • an insertion posterior protector which includes an elongate sheet of material that is shaped so as to define: a proximal coupling portion, which is shaped so as to define one or more couplers that are configured to removably couple the proximal coup
  • the distal protection portion is shaped so as to additionally partially cover a posterior external surface of the distal esophageal balloon when the proximal coupling portion is removably coupled to the shaft, so as to protect the distal esophageal balloon from puncture during insertion thereof into the patient's oral cavity.
  • the one or more couplers are shaped so as to form snap-on couplings to the shaft.
  • the elongate sheet of material of the insertion posterior protector is further shaped so as to define a proximal handle, which is shaped so as to be disposed outside the patient's oral cavity when the laryngeal ventilation support is disposed at the insertion location.
  • a method including: inserting a distal esophageal inflatable balloon, a laryngeal ventilation support, and a proximal pharyngeal inflatable balloon of a dual-balloon ventilation tube through an anterior opening of an oral cavity of a patient, such that: a proximal end of a shaft is disposed outside the oral cavity, wherein the distal end of the shaft supports the laryngeal ventilation support, a ventilation port of the laryngeal ventilation support is in fluid communication with a laryngeal inlet of the patient, and the laryngeal ventilation support is disposed at an insertion location within a pharynx of the patient such that both of lateral sides of the laryngeal ventilation support contact laryngeal soft tissue of the pharynx so as to provide lateral support that centers and inhibits tilting of the laryngeal ventilation support, such that the ventilation port faces anteriorly, a proximal end
  • the laryngeal ventilation support has a greatest lateral width of between 2 and 6 cm, measured between lateral sides of the laryngeal ventilation support.
  • inserting the distal esophageal inflatable balloon, the laryngeal ventilation support, and the proximal pharyngeal inflatable balloon includes inserting the distal esophageal inflatable balloon, the laryngeal ventilation support, and the proximal pharyngeal inflatable balloon while: a proximal coupling portion of an elongate sheet of material of an insertion posterior protector is removably coupled to the shaft proximally to the proximal pharyngeal inflatable balloon by one or more couplers of the proximal coupling portion, and a distal protection portion of the elongate sheet of material partially covers a posterior external surface of the proximal pharyngeal balloon, so as to protect the proximal pharyngeal inflatable balloon from puncture during insertion thereof into the patient's oral cavity, and the method further includes, after inserting the distal esophageal inflatable balloon, the laryngeal ventilation support, and the proximal
  • inserting the distal esophageal inflatable balloon, the laryngeal ventilation support, and the proximal pharyngeal inflatable balloon includes inserting the distal esophageal inflatable balloon, the laryngeal ventilation support, and the proximal pharyngeal inflatable balloon while the distal protection portion additionally partially covers a posterior external surface of the distal esophageal inflatable balloon, so as to protect the distal esophageal inflatable balloon from puncture during insertion thereof into the patient's oral cavity.
  • the one or more couplers are shaped so as to form snap-on couplings to the shaft.
  • inserting the distal esophageal inflatable balloon, the laryngeal ventilation support, and the proximal pharyngeal inflatable balloon includes inserting the distal esophageal inflatable balloon, the laryngeal ventilation support, and the proximal pharyngeal inflatable balloon using a proximal handle of the elongate sheet of material, while the proximal handle is disposed outside the patient's oral cavity.
  • inserting the distal esophageal inflatable balloon, the laryngeal ventilation support, and the proximal pharyngeal inflatable balloon includes inserting the distal esophageal inflatable balloon, the laryngeal ventilation support, and the proximal pharyngeal inflatable balloon such that an inflation valve of an inflation tube of the dual-balloon ventilation tube is disposed outside the patient's oral cavity, a distal end of the inflation tube coupled in fluid communication with an interior of the proximal pharyngeal inflatable balloon
  • inserting the proximal pharyngeal inflatable balloon includes inserting the proximal pharyngeal inflatable balloon, while the inflation valve is closed, from outside the oral cavity of the patient until the laryngeal ventilation support is disposed at the insertion location without opening the inflation valve
  • the dual-balloon ventilation tube is configured such that when the laryngeal ventilation support, while the inflation valve is closed and a pressure within the proximal pharyngeal inflatable
  • inserting the proximal pharyngeal inflatable balloon while the inflation valve is closed includes inserting the proximal pharyngeal inflatable balloon while the inflation valve is closed and the pressure within the proximal pharyngeal inflatable balloon equals ambient pressure.
  • inserting the proximal pharyngeal inflatable balloon while the inflation valve is closed includes inserting the proximal pharyngeal inflatable balloon while the inflation valve is closed without deflating the proximal pharyngeal inflatable balloon before inserting the proximal pharyngeal inflatable balloon.
  • the method does not include measuring the pressure within the proximal pharyngeal inflatable balloon.
  • the method does not include adding air to or removing air from the proximal pharyngeal inflatable balloon after inserting the laryngeal ventilation support is to the insertion location.
  • the method does not include adjusting the pressure within the proximal pharyngeal inflatable balloon after inserting the laryngeal ventilation support to the insertion location.
  • the inserted-location pressure is less than 45 cm H2O.
  • the inserted-location pressure is less than 30 cm H2O.
  • a ventilation tube system including: a dual-balloon ventilation tube including: a laryngeal ventilation support, which is shaped so as to define a ventilation port, which is configured to be in fluid communication with a laryngeal inlet of a patient when the laryngeal ventilation support is disposed at an insertion location within a pharynx of the patient; a shaft having proximal and distal ends, the proximal end configured to be disposed outside an oral cavity of the patient when the laryngeal ventilation support is disposed at the insertion location, and the distal end supporting the laryngeal ventilation support; an airway tube, which passes through at least a longitudinal portion of the shaft, and has a proximal end that is configured to be disposed outside the patient's oral cavity when the laryngeal ventilation support is disposed at the insertion location, and a distal end that is in fluid communication with the ventilation port; a proximal ventilation tube including: a laryngeal ventilation support, which is
  • the distal protection portion is shaped so as to additionally partially cover a posterior external surface of the distal esophageal inflatable balloon when the proximal coupling portion is removably coupled to the shaft, so as to protect the distal esophageal inflatable balloon from puncture during insertion thereof into the patient's oral cavity.
  • the one or more couplers are shaped so as to form snap-on couplings to the shaft.
  • the elongate sheet of material of the insertion posterior protector is further shaped so as to define a proximal handle, which is shaped so as to be disposed outside the patient's oral cavity when the laryngeal ventilation support is disposed at the insertion location.
  • the proximal pharyngeal inflatable balloon and the distal esophageal inflatable balloon are connected in fluid communication.
  • a method including: inserting a distal esophageal inflatable balloon, a laryngeal ventilation support, and a proximal pharyngeal inflatable balloon of a dual-balloon ventilation tube through an anterior opening of an oral cavity of a patient, such that: a proximal end of a shaft is disposed outside the oral cavity, wherein the distal end of the shaft supports the laryngeal ventilation support, a ventilation port of the laryngeal ventilation support is in fluid communication with a laryngeal inlet of the patient, and the laryngeal ventilation support is disposed at an insertion location within a pharynx of the patient, a proximal end of an airway tube is disposed outside the patient's oral cavity, wherein the airway tube passes through at least a longitudinal portion of the shaft, and has a distal end that is in fluid communication with the ventilation port, the proximal pharyngeal inflatable
  • inserting the distal esophageal inflatable balloon, the laryngeal ventilation support, and the proximal pharyngeal inflatable balloon includes inserting the distal esophageal inflatable balloon, the laryngeal ventilation support, and the proximal pharyngeal inflatable balloon while: the distal protection portion is shaped so as to additionally partially cover a posterior external surface of the distal esophageal inflatable balloon, so as to protect the distal esophageal inflatable balloon from puncture during insertion thereof into the patient's oral cavity.
  • the one or more couplers are shaped so as to form snap-on couplings to the shaft.
  • inserting the distal esophageal inflatable balloon, the laryngeal ventilation support, and the proximal pharyngeal inflatable balloon includes inserting the distal esophageal inflatable balloon, the laryngeal ventilation support, and the proximal pharyngeal inflatable balloon includes using a proximal handle of the elongate sheet material, while the proximal handle is disposed outside the patient's oral cavity.
  • FIGs. 1A-E are schematic illustrations of several views of a dual-balloon ventilation tube, in accordance with an application of the present invention
  • Figs. 2A-B are schematic illustrations of several views of the dual-balloon ventilation tube of Figs. 1A-E, in accordance with an application of the present invention
  • Figs. 3A-B are schematic cross-sectional views of the dual-balloon ventilation tube of Figs. 1A-E, in accordance with an application of the present invention
  • Fig. 4 is a schematic illustration of the dual-balloon ventilation tube of Figs. 1A-E inserted through an anterior opening of an oral cavity of a patient, in accordance with an application of the present invention.
  • Figs. 5A-B are schematic illustrations of an insertion posterior protector coupled to and decoupled from the dual-balloon ventilation tube of Figs. 1A-E, respectively, in accordance with an application of the present invention.
  • Figs. 1A-E are schematic illustrations of several views of a dual-balloon ventilation tube 20, in accordance with an application of the present invention.
  • Fig. IE is a schematic cross-sectional view of dual-balloon ventilation tube 20 taken along line IE — IE of Fig. ID.
  • Figs. 2A-B are schematic illustrations of several views of dual-balloon ventilation tube 20, in accordance with an application of the present invention.
  • a proximal pharyngeal inflatable balloon 30 and a distal esophageal inflatable balloon 32 of dual-balloon ventilation tube 20 are shown as translucent to show some elements the view of which would otherwise be blocked by the balloons.
  • the balloons may be translucent, transparent, or opaque, as is known in the art.
  • Figs. 3A-B are schematic cross-sectional views of dual-balloon ventilation tube 20, in accordance with an application of the present invention.
  • Fig. 4 is a schematic illustration of dual-balloon ventilation tube 20 inserted through an anterior opening 22 of an oral cavity 24 of a patient, in accordance with an application of the present invention.
  • anterior opening 22 is the opening of the mouth between lips, between outside oral cavity 24 and inside oral cavity 24.
  • Dual-balloon ventilation tube 20 comprises a laryngeal ventilation support 34, which is shaped so as to define a ventilation port 36, which is configured to be in fluid communication with a laryngeal inlet 38 of the patient so as to supply air to a larynx 42, when laryngeal ventilation support 34 is disposed at an insertion location 40 within a pharynx 64 of the patient, such as shown in Fig. 4.
  • laryngeal ventilation support 34 has a greatest lateral width WQL (labeled in Fig. ID) of between 2 and 6 cm, measured between lateral sides 44 of laryngeal ventilation support 34, such that when laryngeal ventilation support 34 is disposed at insertion location 40, both of lateral sides 44 contact laryngeal soft tissue of pharynx 64 so as to provide lateral support that centers and inhibits (e.g., prevents) tilting of laryngeal ventilation support 34, such that ventilation port 36 faces anteriorly.
  • the greatest lateral width WQL of laryngeal ventilation support 34 is between 3 and 6 cm, such as between 3 and 5.5 cm.
  • the greatest lateral width WQL ' S ' CSS than 2 cm and/or greater than 6 cm.
  • Dual-balloon ventilation tube 20 further comprises a shaft 50 and an airway tube 56 (labeled in Figs. 3A-B), which passes through at least a longitudinal portion of shaft 50 such as through an entirety of a length of shaft 50, as shown in the drawings.
  • shaft 50 is shaped, e.g., molded, so as to define at least a portion of airway tube 56 within shaft 50.
  • Shaft 50 has (a) a proximal end 52 that is configured to be disposed outside oral cavity 24 when laryngeal ventilation support 34 is disposed at insertion location 40, and a distal end 54 that supports laryngeal ventilation support 34.
  • a proximal portion of shaft 50 is disposed outside the patient's oral cavity 24 when laryngeal ventilation support 34 is disposed at insertion location 40, so as to serve as a handle 45 for inserting dualballoon ventilation tube 20 into the patient's oral cavity 24 and properly positioning dualballoon ventilation tube 20.
  • Airway tube 56 has (a) a proximal end 58 (labeled in Fig. 4) that is configured to be disposed outside the patient's oral cavity 24 when laryngeal ventilation support 34 is disposed at insertion location 40, and (b) a distal end 60 (labeled in Fig. 3A) that is in fluid communication with ventilation port 36.
  • Proximal end 58 is typically defined by an airway connector port 59, which is configured for connection to air or other ventilating apparatus for the patient's lungs.
  • shaft 50 comprises PVC, silicone, or TPE.
  • shaft 50 may optionally have a Shore A hardness of at least 30, typically between A40 and A80.
  • Proximal pharyngeal balloon 30 surrounds a distal portion 62 of shaft 50 (labeled in Figs. 2A-B and 3 A) proximal to laryngeal ventilation support 34, and is configured to make an air-tight seal with pharynx 64 of the patient when laryngeal ventilation support 34 is disposed at insertion location 40.
  • proximal pharyngeal balloon 30 forms an airtight seal 46 with an external surface of shaft 50 (such as by gluing or welding).
  • proximal pharyngeal balloon 30 and shaft 50 are configured such that proximal pharyngeal balloon 30 forms air-tight seal 46 entirely around a longitudinal portion of shaft 50.
  • Distal esophageal balloon 32 is disposed distal to laryngeal ventilation support 34, and is configured to make an air-tight seal with an esophagus 66 of the patient (typically, with an upper esophageal sphincter of esophagus 66) when laryngeal ventilation support 34 is disposed at insertion location 40.
  • laryngeal ventilation support 34 is not inflatable.
  • At least 80%, e.g., at least 90%, such as 100%, of an external surface 67 of laryngeal ventilation support 34 is not covered by any inflatable balloon.
  • a posterior surface 68 of laryngeal ventilation support 34 is shaped so as to define at least three, e.g., at least four, elongate grooves 69, and/or no more than ten, e.g., no more than eight elongate grooves 69.
  • Elongate grooves 69 may reduce friction with tissue during insertion.
  • laryngeal ventilation support 34 along a 1-cm-long longitudinal portion 70 thereof, has an average lateral width W ⁇ E (labeled in Fig. ID) greater than 90% of the greatest lateral width WQL (labeled in Fig. ID) of laryngeal ventilation support 34.
  • the greatest lateral width WQL °f laryngeal ventilation support 34 is at least 1.5 times, such as at least 2 times, a greatest anterior-posterior height H (labeled in Fig. 1C) of laryngeal ventilation support 34.
  • laryngeal ventilation support 34 is shaped so as to define an anterior side 80 that is configured to stabilize laryngeal ventilation support 34 with respect to laryngeal inlet 38 when laryngeal ventilation support 34 is disposed at insertion location 40.
  • proximal pharyngeal balloon 30 when unconstrained and inflated at a pressure of 5 cm H2O, has a greatest lateral width Wg (labeled in Fig. ID) that is between 1.2 and 2 times the greatest lateral width WQL (labeled in Fig. ID) of laryngeal ventilation support 34.
  • proximal pharyngeal balloon 30 has: • a higher-pressure aspect ratio equal to the greatest lateral width Wg (labeled in Fig.
  • proximal pharyngeal balloon 30 divided by the greatest anterior-posterior height Hg (labeled in Fig. 1C) of proximal pharyngeal balloon 30 when proximal pharyngeal balloon 30 is unconstrained and inflated at a pressure of 30 cm H2O, and
  • proximal pharyngeal balloon 30 ID of proximal pharyngeal balloon 30 divided by the greatest anterior-posterior height Hg (labeled in Fig. 1C) of proximal pharyngeal balloon 30 when proximal pharyngeal balloon 30 is unconstrained and inflated at a pressure of 5 cm H2O.
  • the higher-pressure aspect ratio is less than the lower-pressure aspect ratio, such as less than 85% of the lower-pressure aspect ratio, e.g., less than 75% or less than 65% of the lower-pressure aspect ratio.
  • resting shape of proximal pharyngeal balloon 30 is oval. When inflated in free space, the balloon becomes much more rounded.
  • proximal pharyngeal balloon 30 when unconstrained and inflated at a pressure of 5 cc H2O, has a greatest lateral width Wg (labeled in Fig. ID) that is between 1.2 and 2 times a lateral width Wg (labeled in Fig. ID) of shaft 50 at an interface 82 between shaft 50 and a proximal end 84 of proximal pharyngeal balloon 30.
  • proximal pharyngeal balloon 30 comprises a highly elastic material, such as silicone, latex, or TPE, and is ergonomically pre-shaped and sized to fit the space bounded by the tongue, soft palate and/or pharyngeal wall; for example, an anterior side 76 of proximal pharyngeal balloon 30 may be generally flat, and a posterior side 78 of proximal pharyngeal balloon 30 may be curved. The ergonomic fit reduces a number of folds of the balloon when it is inflated.
  • proximal pharyngeal balloon 30 may optionally have a Shore hardness of between oo-20 and A-30.
  • proximal pharyngeal inflatable balloon 30 comprises a material having minimal elasticity as commonly used in medical device cuff technology, e.g., PVC or polyurethane.
  • proximal pharyngeal balloon 30 may optionally have a Shore hardness of between 00-30 and A- 15.
  • proximal pharyngeal balloon 30 has greatest lateral width Wp at a location 77 along proximal pharyngeal balloon 30,
  • a line segment 85 having greatest lateral width Wg extends between opposing lateral sides 83 of proximal pharyngeal balloon 30 at location 77,
  • proximal pharyngeal balloon 30 has a greatest-width cross-section 91 perpendicular to central longitudinal axis 88 (labeled in Fig. ID) of laryngeal ventilation support 34, and an outer perimeter 79 of greatest- width cross-section 91 is divided by line segment 85 into a posterior perimeter portion 87 A and an anterior perimeter portion 87B, and
  • a ratio of a length of posterior perimeter portion 87A to a length of anterior perimeter portion 87B is between 1.2:1 and 2:1, such as between 1.2:1 and 1.6:1 or between 1.6:1 and 2:1, the lengths measured along the respective perimeter portions,
  • a ratio of (a) a first greatest distance Dp, in greatest- width cross-section 91 , between posterior side 78 and line segment 85 to (b) a second greatest distance D ⁇ , in greatest-width cross-section 91, between anterior side 76 and line segment 85, is between 1.2:1 and 2:1, such as between 1.2:1 and 1.6:1 or between 1.6:1 and 2:1, and/or
  • a ratio of an area of posterior cross-sectional portion 89 A to an area of anterior cross- sectional portion 89B is between 1.2:1 and 2:1, such as between 1.2:1 and 1.6:1 or between 1.6:1 and 2:1.
  • distal esophageal balloon 32 comprises a highly elastic material, such as silicone, latex, or TPE.
  • distal esophageal balloon 32 may optionally have a Shore hardness of between oo-20 and A-30.
  • proximal pharyngeal inflatable balloon 30 comprises a material having minimal elasticity as commonly used in medical device cuff technology, e.g., PVC or polyurethane.
  • distal esophageal balloon 32 may optionally have a Shore hardness of between 00-30 and A- 15.
  • lateral sides 44 of laryngeal ventilation support 34 are shaped so as to define respective wings 86, which are configured to flex toward a central longitudinal axis 88 (labeled in Fig. ID) of laryngeal ventilation support 34 when squeezed by the laryngeal soft tissue when laryngeal ventilation support 34 is disposed at insertion location 40. Wings 86 may help laryngeal ventilation support 34 accommodate differences in anatomy between patients.
  • proximal pharyngeal balloon 30 when unconstrained and inflated at a pressure of 5 cc H2O, has a greatest lateral distance Dgg from a lateral edge of shaft 50 (labeled in Fig. ID) that is between 5 and 10 mm, and has a greatest anterior- posterior distance Dg ⁇ p from shaft 50 (labeled in Fig. 1C) that is between 0 and 5 mm.
  • proximal pharyngeal balloon 30 is generally ellipsoidal when unconstrained and inflated at a pressure of 5 cc H2O. This shape may help reduce folds in the proximal pharyngeal balloon that might create air leak around the balloon.
  • laryngeal ventilation support 34 comprises a material having a Shore hardness of between A30 and A90, e.g., between A40 and A80.
  • proximal pharyngeal inflatable balloon 30 and distal esophageal inflatable balloon 32 are connected in fluid communication by a tube 33 (labeled in Figs. 3A-B).
  • Dual-balloon ventilation tube 20 further comprises an extemally-accessible inflation tube 51, for supplying air to and extracting air from proximal pharyngeal inflatable balloon 30 and distal esophageal inflatable balloon 32.
  • Inflation tube 51 has (a) a proximal end 53 that is configured to be disposed outside the patient's oral cavity 24 when laryngeal ventilation support 34 is disposed at insertion location 40, and (b) a distal end that is coupled in fluid communication with an interior of proximal pharyngeal inflatable balloon 30, for supplying air to the balloon, and, typically, for supplying air indirectly to distal esophageal inflatable balloon 32 via tube 33.
  • inflation tube 51 is shown only in Figs. 5A-B, although it is provided in all configurations.
  • inflation tube 51 comprises an inflation tube proximal port connector that comprises a male conical fitting with a taper.
  • the taper is at least a 5% taper.
  • the taper is a 6% taper, and the male conical fitting with the 6% taper complies with International Standard ISO 594-1:1986, which is the standard for connections to conventional inflation lumen proximal ports of laryngeal tubes.
  • inflation tube 51 comprises an inflation valve 81 that is configured to be disposed outside the patient's oral cavity 24 when laryngeal ventilation support 34 is disposed at insertion location 40, for holding a given inflation of proximal pharyngeal inflatable balloon 30 and distal esophageal inflatable balloon 32.
  • inflation valve 81 comprises a check-valve.
  • a distal portion of shaft 50 extends into an interior of proximal pharyngeal inflatable balloon 30, as can be seen in Figs. 2A-B and 3A-B, such that a portion of the external surface of shaft 50 is in fluid communication with an interior of proximal pharyngeal inflatable balloon 30.
  • the distal portion of shaft 50 typically passes through at least a portion, such as all, of proximal pharyngeal inflatable balloon 30, such that a portion of proximal pharyngeal inflatable balloon 30 surrounds 360 degrees of the distal portion of shaft 50.
  • distal esophageal inflatable balloon 32 when filled with air at a pressure of 40 cm H2O and unconstrained, has a volume of more than 1.5 times the volume at a pressure of 5 cm H2O.
  • unconstrained means not constrained by the patient's anatomy, a delivery tool, or anything else.
  • dualballoon ventilation tube 20 further comprises a drainage tube that (a) extends from a gastric channel that passes through distal esophageal balloon 32, (a) has a distal gastric opening 92 distal to distal esophageal balloon 32, and (c) has a proximal drainage port at a location outside the patient's oral cavity 24 when laryngeal ventilation support 34 is disposed at insertion location 40.
  • the drainage tube enables extraction and external removal of gastric- discharge products from esophagus 66.
  • the drainage tube is not an essential element of dual-balloon ventilation tube 20, and is not provided in some embodiments of the invention. Therefore, unless specifically stated to the contrary, all features of dual-balloon ventilation tube 20 described herein apply to designs both with and without the drainage tube.
  • respective portions 72A and 72B of a perimeter 74 (labeled in Fig. ID) of laryngeal ventilation support 34 defined by lateral sides 44 are reflectionally symmetric with each other, typically about a plane of symmetry that extends in an anterior/posterior direction (when laryngeal ventilation support 34 is disposed at insertion location 40, the plane of symmetry corresponds to the sagittal plane of the patient). Because of this reflectional symmetry, laryngeal ventilation support 34 provides balanced support on both sides of pharynx 64 to prevent side-to-side tilting of dual-balloon ventilation tube 20.
  • central longitudinal axis 88 of dual-balloon ventilation tube 20 is defined by a line that passes through a centroid of distal esophageal balloon 32 and a centroid of proximal pharyngeal inflatable balloon 30.
  • a projection of laryngeal ventilation support 34 onto a plane (illustrated in Fig. ID), in which central longitudinal axis 88 falls, is divided by central longitudinal axis 88 into two lateral sections on either side of central longitudinal axis 88.
  • an area of one of the lateral sections includes between 40% and 50% of a total area of the projection, such as between 45% and 50% of the total area. Because of this generally even lateral distribution of laryngeal ventilation support 34, laryngeal ventilation support 34 provides balanced support on both sides of pharynx 64 to prevent side-to-side tilting of dual-balloon ventilation tube 20.
  • a method comprises inserting distal esophageal inflatable balloon 32, laryngeal ventilation support 34, and proximal pharyngeal inflatable balloon 30 of dualballoon ventilation tube 20 through anterior opening 22 of oral cavity 24, such that:
  • proximal end 52 of shaft 50 is disposed outside oral cavity 24,
  • ventilation port 36 of laryngeal ventilation support 34 is in fluid communication with the patient's laryngeal inlet 38, and laryngeal ventilation support 34 is disposed at insertion location 40 within the patient's pharynx 64 such that both of lateral sides 44 of laryngeal ventilation support 34 contact laryngeal soft tissue of pharynx 64 so as to provide lateral support that centers and inhibits tilting of laryngeal ventilation support 34, such that ventilation port 36 faces anteriorly,
  • proximal end 58 of airway tube 56 is disposed outside the patient's oral cavity 24,
  • proximal pharyngeal inflatable balloon 30 makes an air-tight seal with the patient's pharynx 64
  • distal esophageal inflatable balloon 32 makes an air-tight seal with the patient's esophagus 66.
  • the method further comprises ventilating lungs of the patient using dual-balloon ventilation tube 20.
  • dual-balloon ventilation tube 20 should be inserted into a throat while proximal pharyngeal inflatable balloon 30 and distal esophageal inflatable balloon 32 are deflated; however, in practice, laryngeal tubes are often inserted while inflated at ambient pressure. Dual-balloon ventilation tube 20 is typically used for ventilating lungs of the patient.
  • dual-balloon ventilation tube 20 is configured such that when laryngeal ventilation support 34 is disposed at insertion location 40 and proximal pharyngeal balloon 30 is inflated at a pressure of 30 cm H2O, proximal pharyngeal balloon 30 spans both (a) a space between a tongue 97 and a pharyngeal back wall of the throat and (b) a lateral space between left and right tonsils, thereby forming a proximal seal between oral cavity 24 and a pharyngeal space above the glottis, distal to proximal pharyngeal balloon 30.
  • dual-balloon ventilation tube 20 is configured such that when laryngeal ventilation support 34, while inflation valve 81 is closed and the pressure within proximal pharyngeal inflatable balloon 30 equals ambient pressure of ambient air, is inserted from outside oral cavity 24 of the patient to insertion location 40 without opening inflation valve 81, the pressure within proximal pharyngeal inflatable balloon 30 increases from the ambient pressure to an inserted-location pressure, the inserted-location pressure less than 60 cm H2O, such as less than 45 cm H2O, e.g., less than 30 cm H2O.
  • inserting proximal pharyngeal inflatable balloon 30 comprises inserting proximal pharyngeal inflatable balloon 30, while inflation valve 81 is closed, from outside oral cavity 24 until laryngeal ventilation support 34 is disposed at insertion location 40 without opening inflation valve 81.
  • dualballoon ventilation tube 20 is configured such that when proximal pharyngeal inflatable balloon 30, while inflation valve 81 is closed and a pressure within proximal pharyngeal inflatable balloon 30 equals ambient pressure, is inserted from outside oral cavity 24 until laryngeal ventilation support 34 is disposed at insertion location 40 without opening inflation valve 81, the pressure within proximal pharyngeal inflatable balloon 30 increases from the ambient pressure to an inserted-location pressure, the inserted-location pressure less than 60 cm H2O, such as less than 45 cm H2O, e.g., less than 30 cm H2O.
  • inserting proximal pharyngeal inflatable balloon 30 while inflation valve 81 is closed comprises inserting proximal pharyngeal inflatable balloon 30 while inflation valve 81 is closed and the pressure within proximal pharyngeal inflatable balloon 30 equals ambient pressure.
  • inserting proximal pharyngeal inflatable balloon 30 while inflation valve 81 is closed comprises inserting proximal pharyngeal inflatable balloon 30 while inflation valve 81 is closed without deflating proximal pharyngeal inflatable balloon 30 before inserting proximal pharyngeal inflatable balloon 30.
  • the method does not comprise measuring the pressure within proximal pharyngeal inflatable balloon 30.
  • the pressure is measured.
  • the method does not comprise adding air to or removing air from proximal pharyngeal inflatable balloon 30 after inserting proximal pharyngeal inflatable balloon 30 until laryngeal ventilation support 34 is disposed at insertion location 40.
  • air is added to or removed from proximal pharyngeal inflatable balloon 30 after inserting proximal pharyngeal inflatable balloon 30, such as for applications in which the pressure is measured, as described above, and found to be too low or too high, respectively.
  • the method does not comprise adjusting the pressure within proximal pharyngeal inflatable balloon 30 after inserting proximal pharyngeal inflatable balloon 30 until laryngeal ventilation support 34 is disposed at insertion location 40.
  • the pressure is adjusted within proximal pharyngeal inflatable balloon 30 after inserting proximal pharyngeal inflatable balloon 30 until laryngeal ventilation support 34 is disposed at insertion location 40, such as for applications in which the pressure is measured, as described above, and found to be too low or too high.
  • dual-balloon ventilation tube 20 is configured such that when a volume of 6 cc of ambient air, the volume measured at atmospheric pressure, is introduced into externally-accessible inflation tube 51 while proximal pharyngeal balloon 30 and distal esophageal inflatable balloon 32 are unconstrained, disposed in ambient air that is at standard atmospheric pressure (i.e., air pressure at sea level), and at is an inflation pressure of 30 cm H2O: the inflation pressure in proximal pharyngeal balloon 30, measured one minute after introduction of the volume of 6 cc of the ambient air, is less than 40 cm H2O.
  • a dual-balloon ventilation tube similar to dual-balloon ventilation tube 20 was compared to a Ambu® King LTS-D ⁇ M Disposable Laryngeal Tube size #4 (Ambu A/S, Ballerup, Denmark).
  • the respective proximal balloons were inflated to an inflation pressure of 30 cm H2O. 6 cc of ambient air was drawn into a syringe and introduced into each of the respective proximal balloons.
  • the inflation pressure in the proximal balloon of the dual-balloon ventilation tube similar to dual-balloon ventilation tube 20 increased from the initial 30 cm H2O to 36.4 cm H2O, while the inflation pressure in the proximal balloon of the Ambu® King device increased from the initial 30 cm H2O to 43.9 cm H2O.
  • distal esophageal inflatable balloon 32 has one or more of the pressure-related properties of proximal pharyngeal inflatable balloon 30 described above, mutatis mutandis.
  • Insertion posterior protector 100 assists with insertion of dual-balloon ventilation tube 20 into the patient.
  • Insertion posterior protector 100 comprises an elongate sheet of material 102 that is shaped so as to define:
  • a proximal coupling portion 104 which is shaped so as to define one or more couplers 106 that are configured to removably couple the proximal coupling portion to shaft 50 proximally to proximal pharyngeal balloon 30, and
  • a distal protection portion 108 which is shaped so as to partially cover a posterior external surface 110 of proximal pharyngeal balloon 30 when proximal coupling portion 104 is removably coupled to shaft 50, so as to protect proximal pharyngeal balloon 30 from puncture (such as by the patient's teeth) during insertion thereof into the patient's oral cavity 24.
  • distal protection portion 108 is shaped so as to additionally partially cover a posterior external surface 111 of distal esophageal balloon 32 when proximal coupling portion 104 is removably coupled to shaft 50, so as to protect distal esophageal balloon 32 from puncture (such as by the patient's teeth) during insertion thereof into the patient's oral cavity 24.
  • the one or more couplers 106 are shaped so as to form snap- on couplings to shaft 50, such as illustrated.
  • the one or more couplers 106 are shaped as to otherwise mechanically or chemically removably couple the proximal coupling portion to shaft 50 proximally to proximal pharyngeal balloon 30.
  • elongate sheet of material 102 of insertion posterior protector 100 is further shaped so as to define a proximal handle 112, which is shaped so as to be disposed outside the patient's oral cavity 24 when laryngeal ventilation support 34 is disposed at insertion location 40.
  • Proximal handle 112 may be used to decouple insertion posterior protector 100 from shaft 50 and remove insertion posterior protector 100 from the patient's oral cavity 24 after laryngeal ventilation support 34 has been disposed at insertion location 40.
  • elongate sheet of material 102 has an average thickness of between 0.5 and 2 mm.
  • elongate sheet of material 102 comprises a polymer (e.g., PVC, ABS, or polyurethane) or a metal.
  • proximal pharyngeal inflatable balloon 30 and distal esophageal inflatable balloon 32 are single-layer balloons, i.e., have only a single wall, as can be seen in the cross-sectional figures.

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Abstract

La présente invention concerne un tube de ventilation à double ballonnet (20) qui comprend un support de ventilation laryngée (34) supporté par une extrémité distale (54) d'un arbre (50), formant un orifice de ventilation (36), et ayant une largeur latérale maximale de 2 à 6 cm, mesurée entre des côtés latéraux (44) du support de ventilation laryngée (34), de telle sorte que les deux côtés latéraux (44) entrent en contact avec le tissu mou laryngé du pharynx de façon à fournir un support latéral qui centre et empêche l'inclinaison du support de ventilation laryngée (34). Un tube de voie aérienne (56) passe à travers l'arbre (50) et a une extrémité distale (60) qui est en communication fluidique avec l'orifice de ventilation (36). Un ballonnet gonflable pharyngé proximal (30) entoure une partie distale (62) de l'arbre (50) à proximité du support de ventilation laryngée (34), et est conçu pour assurer une étanchéité à l'air avec le pharynx. Un ballonnet gonflable œsophagien distal (32) est disposé de manière distale par rapport au support de ventilation laryngée (34), et est conçu pour assurer une étanchéité à l'air avec l'œsophage. D'autres modes de réalisation sont également décrits.
EP21868875.2A 2021-05-14 2021-09-13 Tube de ventilation à double ballonnet Pending EP4337289A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202163188496P 2021-05-14 2021-05-14
PCT/IL2021/051108 WO2022059000A1 (fr) 2020-09-17 2021-09-13 Tube de ventilation à double ballonnet

Publications (1)

Publication Number Publication Date
EP4337289A1 true EP4337289A1 (fr) 2024-03-20

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EP21868875.2A Pending EP4337289A1 (fr) 2021-05-14 2021-09-13 Tube de ventilation à double ballonnet

Country Status (1)

Country Link
EP (1) EP4337289A1 (fr)

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