CA2346248A1 - Laryngeal mask airway device - Google Patents

Laryngeal mask airway device Download PDF

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Publication number
CA2346248A1
CA2346248A1 CA002346248A CA2346248A CA2346248A1 CA 2346248 A1 CA2346248 A1 CA 2346248A1 CA 002346248 A CA002346248 A CA 002346248A CA 2346248 A CA2346248 A CA 2346248A CA 2346248 A1 CA2346248 A1 CA 2346248A1
Authority
CA
Canada
Prior art keywords
laryngeal
backplate
pharyngeal
region
cuff
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.)
Granted
Application number
CA002346248A
Other languages
French (fr)
Other versions
CA2346248C (en
Inventor
Archibald Ian Jeremy Brain
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.)
Laryngeal Mask Co Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10840092&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2346248(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to CA2650217A priority Critical patent/CA2650217C/en
Priority to CA2650214A priority patent/CA2650214C/en
Priority to CA2650215A priority patent/CA2650215C/en
Publication of CA2346248A1 publication Critical patent/CA2346248A1/en
Application granted granted Critical
Publication of CA2346248C publication Critical patent/CA2346248C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • A61M16/0443—Special cuff-wall materials
    • 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
    • A61M16/0488—Mouthpieces; Means for guiding, securing or introducing the 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
    • A61M2210/00—Anatomical parts of the body
    • A61M2210/06—Head
    • A61M2210/0625—Mouth
    • A61M2210/0656—Epiglottis

Abstract

A modified laryngeal mask airway device (LMA-device) (20) is provided with means to improve ease of insertion, reliability of function and higher seal pressure (i.e., cuff pressure ratio). The LMA-device (20) includes an indent ed section (140) of the airway tube (47) to offer locating means and purchase f or the inserting finger, and extended mask aperture bars (115, 117) to increase the effective ventilating area of the mask (20) and reduce the possibility o f epiglottis displacement occasioned by mask insertion. The LMA-device (20) further includes a modification of the airway tube angle (137) of attachment to the mask (20), and provision of a posterior or back-cushion (77) covering the entire posterior surface of the mask (20).

Claims (10)

1. A laryngeal-mask airway device comprising:
an inflatable main-cuff which, when inflated, has the shape of a torus generated by an asymmetrical oval having a wider proximal region and a narrower distal region, said main-cuff having an inflation port connected to said proximal region and being a molded product of relatively thin and softly pliant elastomeric material; and a backplate comprising a bowl having a transversely concave laryngeal-side and a convex pharyngeal-side, said backplate being hermetically bonded to a periphery of said main-cuff establishing separation between a laryngeal-chamber region and a pharyngeal region, said backplate further comprising an external tube joint adjacent to said proximal region of said main-cuff, said tube joint being formed on said pharyngeal-side and extending from said pharyngeal-side into said pharyngeal region, said tube joint further including a passageway extending through said backplate for communication between said pharyngeal and laryngeal-chamber regions, said bowl having a longitudinal distal rib for longitudinally supporting the distal region of said main-cuff.
2. A laryngeal-mask airway device as set forth in claim 1, wherein said distal rib extends into and through the interior of the distal region of said main-cuff.
3. A laryngeal-mask airway device as set forth in claim 2, wherein said distal rib has a distal tip which contacts the distal tip of said main-cuff:
4. A laryngeal-mask airway device as set forth in claim 1, wherein said distal rib is seated on the anterior surface of the distal region of said main-cuff.
5. A backplate for a laryngeal-mask airway device, said backplate comprising a bowl having a transversely concave laryngeal-side and a convex pharyngeal-side, said laryngeal-side having an airway aperture, said backplate being hermetically bonded to a periphery of a main-cuff establishing separation between a laryngeal-chamber region and a pharyngeal region, said backplate further comprising an external tube joint adjacent to said proximal region of said main-cuff, said tube joint being formed on said pharyngeal-side and extending from said pharyngeal-side into said pharyngeal region, said tube joint further including a passageway extending through said backplate for communication between said pharyngeal and laryngeal-chamber regions, said passageway opening through said airway aperture into said laryngeal-chamber region, said backplate further comprising a first mask aperture bar having opposing proximal and distal ends adjoining said laryngeal side proximally and distally of said airway aperture, respectively, said distal end of said first mask aperture bar being longitudinally positioned generally near the longitudinal mid-point of said laryngeal-side, or distally of said laryngeal-side to limit the angle between the mask aperture bar and the major plane of the main-cuff.
6. A backplate as set forth in claim 5, wherein said backplate comprises a second mask aperture bar having proximal and distal ends adjoining said laryngeal-side at generally the same longitudinal positions along said laryngeal-side as the corresponding proximal and distal ends of said first mask aperture bar.
7. A backplate as set forth in claim 6, wherein said backplate has a sagittal plane on opposite sides of which said first and second mask aperture bars are disposed.
8. A backplate as set forth in claim 7, wherein said first and second mask aperture bars are symmetrical relative to said sagittal plane.
9. A backplate for a laryngeal-mask airway device, said backplate comprising a bowl having a transversely concave laryngeal-side and a convex pharyngeal-side, said backplate being hermetically bonded to a periphery of a main-cuff establishing separation between a laryngeal-chamber region and a pharyngeal region, said backplate further comprising an external tube joint adjacent to said proximal region of said main-cuff, said tube joint being formed on said pharyngeal-side and extending from said pharyngeal-side into said pharyngeal region, said tube joint further including a passageway extending through said backplate for communication between said pharyngeal and laryngeal-chamber regions, said tube joint having an anterior outer surface in which is formed an indentation for directing the backplate.
10. A laryngeal-mask airway device comprising:
an inflatable main-cuff which, when inflated, has the shape of a torus generated by an asymmetrical oval having a wider proximal region and a narrower distal region, said main-cuff having an inflation port connected to said proximal region and being a molded product of relatively thin and softly pliant elastomeric material;
a backplate comprising a bowl having a transversely concave laryngeal-side and a convex pharyngeal-side, said backplate being hermetically bonded to a periphery of a main-cuff establishing separation between a laryngeal-chamber region and a pharyngeal region, said backplate further comprising an external tube joint adjacent to said proximal region of said main-cuff, said tube joint being formed on said pharyngeal-side and extending from said pharyngeal-side into said pharyngeal region, said tube joint further including a passageway extending through said backplate for communication between said pharyngeal and laryngeal-chamber regions, the portion of said bowl bonded to said main-cuff defining a bowl plane, said tube joint having a longitudinal axis forming an acute angle with a bowl plane; and a back-cushion bonded to said pharyngeal-side, said back-cushion having a sufficient resistance to compression to enable a reduced acute angle between the tube joint and bowl plane.
CA002346248A 1998-10-06 1999-10-06 Laryngeal mask airway device Expired - Fee Related CA2346248C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA2650217A CA2650217C (en) 1998-10-06 1999-10-06 Laryngeal mask airway device
CA2650214A CA2650214C (en) 1998-10-06 1999-10-06 Laryngeal mask airway device
CA2650215A CA2650215C (en) 1998-10-06 1999-10-06 Laryngeal mask airway device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9821771.4 1998-10-06
GBGB9821771.4A GB9821771D0 (en) 1998-10-06 1998-10-06 Improvements relating to laryngeal mask airway devices
PCT/GB1999/003309 WO2000020062A2 (en) 1998-10-06 1999-10-06 Laryngeal mask airway device

Related Child Applications (3)

Application Number Title Priority Date Filing Date
CA2650215A Division CA2650215C (en) 1998-10-06 1999-10-06 Laryngeal mask airway device
CA2650214A Division CA2650214C (en) 1998-10-06 1999-10-06 Laryngeal mask airway device
CA2650217A Division CA2650217C (en) 1998-10-06 1999-10-06 Laryngeal mask airway device

Publications (2)

Publication Number Publication Date
CA2346248A1 true CA2346248A1 (en) 2000-04-13
CA2346248C CA2346248C (en) 2009-12-01

Family

ID=10840092

Family Applications (4)

Application Number Title Priority Date Filing Date
CA2650214A Expired - Fee Related CA2650214C (en) 1998-10-06 1999-10-06 Laryngeal mask airway device
CA2650217A Expired - Fee Related CA2650217C (en) 1998-10-06 1999-10-06 Laryngeal mask airway device
CA002346248A Expired - Fee Related CA2346248C (en) 1998-10-06 1999-10-06 Laryngeal mask airway device
CA2650215A Expired - Fee Related CA2650215C (en) 1998-10-06 1999-10-06 Laryngeal mask airway device

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CA2650214A Expired - Fee Related CA2650214C (en) 1998-10-06 1999-10-06 Laryngeal mask airway device
CA2650217A Expired - Fee Related CA2650217C (en) 1998-10-06 1999-10-06 Laryngeal mask airway device

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA2650215A Expired - Fee Related CA2650215C (en) 1998-10-06 1999-10-06 Laryngeal mask airway device

Country Status (11)

Country Link
US (4) US7156100B1 (en)
EP (4) EP1119386B1 (en)
AT (1) ATE303839T1 (en)
AU (1) AU6113399A (en)
CA (4) CA2650214C (en)
DE (2) DE99947765T1 (en)
DK (1) DK1119386T3 (en)
ES (1) ES2252977T3 (en)
GB (1) GB9821771D0 (en)
HK (1) HK1037985A1 (en)
WO (1) WO2000020062A2 (en)

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