WO1997012641B1 - Laryngeal mask airway incorporating an epiglottic elevating mechanism - Google Patents
Laryngeal mask airway incorporating an epiglottic elevating mechanismInfo
- Publication number
- WO1997012641B1 WO1997012641B1 PCT/GB1996/002426 GB9602426W WO9712641B1 WO 1997012641 B1 WO1997012641 B1 WO 1997012641B1 GB 9602426 W GB9602426 W GB 9602426W WO 9712641 B1 WO9712641 B1 WO 9712641B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mask
- aperture
- bar
- laryngeal
- instrumentation
- Prior art date
Links
- 230000003028 elevating effect Effects 0.000 title 1
- 210000002409 epiglottis Anatomy 0.000 claims abstract 12
- 238000009423 ventilation Methods 0.000 claims abstract 9
- 210000004072 lung Anatomy 0.000 claims abstract 5
- 239000000463 material Substances 0.000 claims abstract 3
- 230000002093 peripheral effect Effects 0.000 claims abstract 3
- 238000010276 construction Methods 0.000 claims 14
- 230000000873 masking effect Effects 0.000 claims 9
- 238000006073 displacement reaction Methods 0.000 claims 3
- 230000001154 acute effect Effects 0.000 claims 2
- 230000004888 barrier function Effects 0.000 claims 2
- 210000000205 arytenoid cartilage Anatomy 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000013536 elastomeric material Substances 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 230000003019 stabilising effect Effects 0.000 claims 1
- 210000000867 larynx Anatomy 0.000 abstract 1
- 210000005070 sphincter Anatomy 0.000 abstract 1
Abstract
An artificial airway device (10) to facilitate a patient's lung ventilation comprises an airway tube (14) and a laryngeal mask (11) at one end of the tube (14). The mask (11) is of generally elliptical configuration, with an inflatable peripheral cuff (12) of flexible material around the edges of the mask (11), for sealed support of the mask (11) around the inlet to the patient's larynx (27). The mask (11) has an aperture (13) through which the airway tube (14) opens into the interior of the mask (11). The mask (11) also comprises a longitudinally directed bar (20), extending across the mask aperture (13), from the central upper edge or rim (21) of the mask aperture (13), to which it has effectively a hinged attachment, to the posterior rim (21) of the mask aperture (13), at which the bar (20) is free. The hinged mounting of this bar (20) is so positioned at longitudinal offset from the distal end of the mask (11) (which locates in the upper sphincter or oesophageal inlet) that the introduction of an inserted endotracheal tube (29) will automatically engage and swing the bar (20) backward into camming engagement with the epiglottis (30), thus easily folding the epiglottis (30) backward against the wall of the laryngeal inlet and permitting undeflected insertional passage of the endotracheal tube (29) to and through the laryngeal inlet.
Claims
1. A laryngeal mask to facilitate ventilation of the lungs of a patient, comprising a generally elliptical ring and means for inflating/deflating the same, mask structure within and peripherally connected to the ring and having a tubular inlet-air connection adapted for externally available ventilation through an aperture in the mask structure, the aperture having an area aligned for a direct passage of instrumentation inserted via the tubular inlet-air connection, a longitudinally extending central bar having hinged connection at its upper end to the mask structure via the upper end of the aperture, the hinged connection being such as to position the bar across the center of the aperture in an at-rest position and to be compliantly deflected out of the at-rest position in response to engagement by instrumentation advanced through the tubular inlet-air connection.
2. A laryngeal mask to facilitate ventilation of the lungs of a patient, comprising a generally elliptical ring and means for inflating/deflating the same, mask structure within and peripherally connected to the ring and having a tubular inlet-air connection adapted for externally available ventilation through an aperture in the mask structure, the aperture having an area aligned for direct passage of instrumentation inserted via the tubular inlet-air connection, a longitudinally extending central bar having an integrally formed compliantly yieldable hinge connection at its upper end to the mask structure via the center of the proximal upper end of the aperture, the hinge connection being such as to position the bar across the center of the aperture in an at-rest position and to be compliantly deflected out of the at-rest position in response to the engagement by instrumentation advanced through the tubular inlet-air connection.
3. A laryngeal mask according to claim 1 or claim 2, in which the distal end of the bar is free of connection to the distal lower end of the aperture.
4. A laryngeal mask according to claim 3, in which the distal rim of the lower end of the aperture has a recess formation that is adapted to receive and locate the bar in its at-rest position.
5. A laryngeal mask according to any one of claims 1 to 4, in which the area within the inflatable ring is sized to receive the patient's epiglottis, with the bar in its at-rest position preventing airway closure by the epiglottis, and with the hinge connection of the bar being at least at some longitudinal offset proximally above the location of the at-rest bar contact with the epiglottis, whereby an inserted ET or other instrumentation through the inlet-air connection will, on encountering contact: with the bar, elevate the bar and at the same time fold the epiglottis back out of the path of advancing instrument passage.
6. A laryngeal mask according to claim 5, in which the bar is upwardly bowed in the form of an arched surface poised for initial contact with an advancing endotracheal tube, wherein initial contact is at a region of acute-angel relationship between the directed axis of ET insertion and a tangent to the arched surface of the bar.
7. A laryngeal mask according to any one of claims 1 to 6, in which the bar is of progressively reducing effective width wherein maximum width is at the region of the effective hinge connection.
8. A laryngeal mask according to any one of claims 1 to 7, in which the mask has laterally spaced recesses for accommodating the respective arytenoid cartilages of the patient.
9. A laryngeal mask to facilitate ventilation of the lungs of a patient, comprising a generally elliptical ring having softly compliant peripheral engageability to a laryngeal inlet, mask structure within and peripherally connected to the ring and having a tubular inlet-air connection adapted for externally available ventilation through an aperture in the mask structure, the aperture having an area aligned for direct passage of instrumentation inserted vial the tubular inlet-air connection, a longitudinally extending central bar integrally formed with the mask structure and having compliantly yieldable hinged connection at its upper end to the mask structure via the upper end of the aperture, the hinged connection being such as to position the bar across the center of the aperture in an at-rest position and to be compliantly deflected out of the at-rest position in response to engagement by instrumentation advanced through the tubular inlet-air connection.
10. A laryngeal mask airway construction, wherein an airway tube has a distal end adapted with masking structure to provide in a generally single plane a peripherally sealed engagement to the laryngeal inlet of a patient thereby to establish a pharyngeal side of the mask structure apart from an opposite laryngeal side of the mask, and wherein the masking structure provides a single passage for airway supply to the pharyngeal side of the mask for exclusive acute-angle communication with the laryngeal side of the mask via an airway aperture in the mask, the acute-angle communication being with respect to the plane, and wherein a bar to prevent epiglottis blockage of the airway aperture is integrally formed with the masking structure and is elongate in the general direction of airway passage through the mask aperture and is so hingedly connected to the laryngeal side of the mask as, in an at-rest position thereof, to diametrically span the airway aperture of the mask and thus to provide a barrier against epiglottis blockage of airflow though the mask, the hinge connection being such that the bar is compliantly deflectable in the event of instrumentation such as an endotracheal tube being inserted via the airway tube for guidance to and through the laryngeal inlet, the compliant deflection being upon advancing-displacement contact of the bar by the inserted instrumentation, and the deflection being sufficient o deflect the epiglottis while removing the bar from interference with the airway-directed guidance of the instrumentation.
11. A construction according to claim 10, wherein ramp means constituting an integrally formed features of the mask is so positioned in the path of instrumentation inserted via the airway tube as to deflect the instrumentation into a distally continuing path which is inclined to the plane at a greater acute angle than prior to ramp contact with the instrumentation.
12. A construction according to claim 11, in which the cross-sectional profile of the ramp means transverse to the path is V-shaped and symmetrical on opposite sides of the longitudinal plane of symmetry of the mask, whereby the V-shape serves to position the axis of advancing instrumentation in the longitudinal plane of symmetry of the mask.
13. A construction according to claim 10, in which the ramp means constituting a displaceable feature of the mask is so positioned in the path of instrumentation inserted via the airway tube as to deflect the instrumentation into a distally continuing path which is inclined to the plane at a greater acute angle than prior to ramp contact with the instrumentation, the ramp means including selectively operable means for variably controlling the extent to which the ramp means extends into the path of instrumentation inserted via the airway tube, whereby to selectively control the extent to which the instrumentation is deflected by the ramp means.
14. A construction according to claim 13, in which the selectively operable means is pneumatic.
15. A construction according to claim 10, wherein the airway tube is relatively rigid and the mask in structure is relatively flexible, and wherein ramp means constituting an integrally formed feature of the mask is so positioned in the path of instrumentation inserted via the airway tube as to enable deflection of the instrumentation into a distally continuing defected path which is at a deflected angle from the direction of exit from the airway tube, the deflected angle being selectively manipulable by reason of the relatively flexible nature of the masking structure as compared to the relatively rigid nature of the airway tube, thereby enabling manipulation of the airway tube to selectively manoeuvre the distal end of the instrumentation advar. :ed through and projecting beyond the masking structur-, whereby to sense the glottic opening and for inst -umentation entry in and through the glottic opening.
16. A construction according to claim 15, in which the integrally formed feature has a V-shaped transverse section t αat is adapted to provide for advancing instrumenta ion of rod-like configuration a central stabilising r ference to the mask structure.
17. A construc ion according to claim 16, in which the integra -ly formed feature is at substantially the 1 ^ngitudinal midsection of the masking structure.
18. A larynge.,1 mask airway construction, wherein a rigid εirway tube has an external manipulating handle a", its proximal end and is adapted at its distal end wit:, masking structure to provide in a generally single plane a peripherally sealed engagement to the laryngeal inlet of a patient thereby to establish a pharyngeal side of the mask structure apart from an opposite laryngeal side of the mask for exclusive acute-angle communication with the laryngeal side of the mask via an airway aperture in the mask, the acute-angle communication being with respect to the plane, and wherein a bar to prevent epiglottis blockage of the airway aperture is integrally formed with the masking structure and is elongate in the general direction of airway passage through the mask aperture, the bar being so hingedly connected to the laryngeal side of the mask as, in an at-rest position thereof, to diametrically span the airway aperture and thus to provide a barrier against epiglottis blockage of airflow though the mask, the hinge connection being such that the bar is compliantly deflectable in the event of an endotracheal tube or other instrument being inserted via the airway tube for guidance to and through the laryngeal inlet, and the mask including pneumatically operative ramp means operative in the path of advancing displacement of the endotracheal tube to deflect the path of advancing displacement of the endotracheal tube while also deflecting the bar as well as the epiglottis.
19. A construction according to claim 18, in which actuating means for the pneumatically operative ramp means is mounted to the manipulating means.
20. A construction according to claim 19, in which the actuating means is pneuma ic and has a flexible-tube connection to the ramp means.
21. A construction according to claim 18, in which the ramp means has a cross-sectional profile transverse to the path, wherein the sectional profile is V-shaped and symmetrical on opposite sides of the longitudinal plane of symmetry of the mask.
22. A construction according to any one of claims 18 to 21, in which the mask comprises a backing plate surrounded by an inflatable ring, the backing plate being of compliant elastomeric material and having a counterbored inlet by which the distal end of the rigid airway tube is connected to the mask, the axial extent of the counterbored inlet being at least approximately the diameter of the rigid airway tube, and the distal end of the airway tube being truncated for at least half of its distal-end circumference, wherein the truncation is at an angle in the range of 35 to 45° with respect to the axis of the airway tube at its distal end.
23. A construction according to claim 22, wherein the truncation is symmetrical on opposite sides of the longitudinal plane of symmetry of the mask, and wherein the truncation faces the single plane.
24. A construction according to any one of claims 18 to 23, in which the masking structure includes a concave bowl of generally elliptical configuration wherein the concavity faces the laryngeal inlet and has distally convergent: segments, and a skirt of pliant material continuously connected to the mask structure and spanning the distally convergent segments and the distal-end-bowl region between the segments to thereby define a proximally open pocket between the skirt and the distal-end region of the bowl concavity.
25. A laryngeal mask to facilitate ventilation of the lungs of a patient, comprising a generally elliptical ring with distally convergent segments and means for inflating/deflating the same to establish a peripheral engagement of the mask around the patient's laryngeal inlet, mask structure comprising a concave bowl wherein the concavity of the bowl extends between proximal and distal longitudinal ends and is adapted to face the laryngeal inlet, the bowl being within and peripherally connected to the ring and having a proximal-end tubular inlet-air connection adapted for externally available ventilation through an aperture in the mask structure, the aperture having an area aligned for direct passage of instrumentation inserted via the tubular inlet-air connection, a longitudinally extending central bar integrally formed with the mask structure and having compliantly yieldable hinged connection at its upper end to the mask structure via the upper end of the aperture, the hinged connection being such as to position the bar across the center of the aperture in an at-rest position and to be compliantly deflected out of the at-rest position in response to engagement by instrumentation advanced through the tubular inlet-air connection, and a skirt of pliant sheet material continuously connected to the adjacent distally convergent segments of the inflatable ring and thus defining a proximally open pocket between the skirt and the distal-end region of the concavity of the bowl.
26. A laryngeal mask according to claim 25, in which the skirt is at longitudinally offset from the bar.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP96932712A EP0794808B1 (en) | 1995-10-03 | 1996-10-03 | Laryngeal mask airway incorporating an epiglottic elevating mechanism |
| CA002206697A CA2206697C (en) | 1995-10-03 | 1996-10-03 | Endotracheal-tube guidance system with epiglottis-elevating feature |
| AU71391/96A AU785498B2 (en) | 1995-10-03 | 1996-10-03 | Laryngeal mask airway incorporating an epiglottic elevating mechanism |
| DE69621583T DE69621583T2 (en) | 1995-10-03 | 1996-10-03 | THROAT MASK AND MECHANISM TO LIFT UP AN EPIGLOTTIS |
| JP51407497A JP3835625B2 (en) | 1995-10-03 | 1996-10-03 | Laryngeal mask airway with rising mechanism of epiglottis |
| BR9606676A BR9606676A (en) | 1995-10-03 | 1996-10-03 | Laryngeal mask to facilitate ventilation of a patient's lungs and construction of an air-conducting laryngeal mask |
| TW085112113A TW376318B (en) | 1995-10-03 | 1996-10-03 | Laryngeal mask airway incorporating an epiglottic elevating mechanism an artificial airway device to facilitate a patient's lung ventilation comprises an airway tube and a laryngeal mask at one end of the tube |
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9520139.8A GB9520139D0 (en) | 1995-10-03 | 1995-10-03 | A laryngeal mask airway incorporating an epiglottic elevating mechanism |
| GB9520139.8 | 1995-10-03 | ||
| GBGB9523964.6A GB9523964D0 (en) | 1995-10-03 | 1995-11-23 | Artificial air way device |
| GB9523964.6 | 1995-11-23 | ||
| US64195796A | 1996-05-02 | 1996-05-02 | |
| US08/641,957 | 1996-05-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1997012641A1 WO1997012641A1 (en) | 1997-04-10 |
| WO1997012641B1 true WO1997012641B1 (en) | 1997-05-09 |
Family
ID=27267932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/GB1996/002426 WO1997012641A1 (en) | 1995-10-03 | 1996-10-03 | Laryngeal mask airway incorporating an epiglottic elevating mechanism |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US5896858A (en) |
| EP (1) | EP0794808B1 (en) |
| JP (1) | JP3835625B2 (en) |
| CN (1) | CN1122543C (en) |
| AU (1) | AU785498B2 (en) |
| BR (1) | BR9606676A (en) |
| CA (1) | CA2206697C (en) |
| DE (1) | DE69621583T2 (en) |
| ES (1) | ES2177803T3 (en) |
| MY (1) | MY115052A (en) |
| TR (1) | TR199700455T1 (en) |
| WO (1) | WO1997012641A1 (en) |
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| CN110652642B (en) * | 2019-10-30 | 2024-11-15 | 安徽探索医疗器械科技有限公司 | Three-lumen flushable fish-mouth laryngeal mask airway tube |
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| US5443063A (en) * | 1993-08-31 | 1995-08-22 | The Johns Hopkins University | Cuffed oro-pharyngeal airway |
| GB9606012D0 (en) * | 1996-03-22 | 1996-05-22 | Brain Archibald Ian Jeremy | Laryngeal mask with gastric-drainage feature |
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- 1996-09-28 MY MYPI96004030A patent/MY115052A/en unknown
- 1996-10-03 BR BR9606676A patent/BR9606676A/en not_active IP Right Cessation
- 1996-10-03 CN CN96191166A patent/CN1122543C/en not_active Expired - Fee Related
- 1996-10-03 DE DE69621583T patent/DE69621583T2/en not_active Expired - Lifetime
- 1996-10-03 TR TR97/00455T patent/TR199700455T1/en unknown
- 1996-10-03 CA CA002206697A patent/CA2206697C/en not_active Expired - Fee Related
- 1996-10-03 EP EP96932712A patent/EP0794808B1/en not_active Expired - Lifetime
- 1996-10-03 WO PCT/GB1996/002426 patent/WO1997012641A1/en active IP Right Grant
- 1996-10-03 JP JP51407497A patent/JP3835625B2/en not_active Expired - Fee Related
- 1996-10-03 AU AU71391/96A patent/AU785498B2/en not_active Ceased
- 1996-10-03 ES ES96932712T patent/ES2177803T3/en not_active Expired - Lifetime
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1997
- 1997-04-04 US US08/826,563 patent/US5896858A/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7273053B2 (en) | 1997-12-24 | 2007-09-25 | Mario Zocca | Monitoring and control for a laryngeal mask airway device |
| US7331346B2 (en) | 1997-12-24 | 2008-02-19 | Indian Ocean Medical, Inc. | Monitoring and control for a laryngeal mask airway device |
| US7305985B2 (en) | 1998-08-13 | 2007-12-11 | The Laryngeal Mask Company Limited | Laryngeal mask airway device |
| US7493901B2 (en) | 1998-10-06 | 2009-02-24 | The Laryngeal Mask Company Ltd. | Laryngeal mask airway device |
| US7506648B2 (en) | 1998-10-06 | 2009-03-24 | The Laryngeal Mask Company Ltd. | Laryngeal mask airway device |
| US7159589B2 (en) | 2001-08-23 | 2007-01-09 | Indian Ocean Medical Inc. | Disposable laryngeal mask airway device |
| US7128071B2 (en) | 2003-09-10 | 2006-10-31 | Indian Ocean Medical Inc. | Intubating laryngeal mask airway device with fiber optic assembly |
| US9522245B2 (en) | 2005-05-27 | 2016-12-20 | The Laryngeal Mask Company Ltd. | Laryngeal mask airway device and method of manufacture |
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