GB2318735A - Laryngeal mask airway and manufacture thereof - Google Patents
Laryngeal mask airway and manufacture thereof Download PDFInfo
- Publication number
- GB2318735A GB2318735A GB9722394A GB9722394A GB2318735A GB 2318735 A GB2318735 A GB 2318735A GB 9722394 A GB9722394 A GB 9722394A GB 9722394 A GB9722394 A GB 9722394A GB 2318735 A GB2318735 A GB 2318735A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mount member
- web
- expandable
- ring
- mask portion
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 12
- 210000003026 hypopharynx Anatomy 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000005755 formation reaction Methods 0.000 claims description 2
- 238000005304 joining Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920002614 Polyether block amide Polymers 0.000 description 1
- 230000003444 anaesthetic effect Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 210000002409 epiglottis Anatomy 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 210000001260 vocal cord Anatomy 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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. ventilators; 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. ventilators; 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. ventilators; Tracheal tubes
- A61M16/04—Tracheal tubes
- A61M16/0434—Cuffs
- A61M16/0445—Special cuff forms, e.g. undulated
Landscapes
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- Emergency Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
A laryngeal mask assembly has a mask portion 13 of elliptical shape formed by a mount 15 and an inflatable member 16 attached to the mount. The inflatable member 16 is formed by heat bonding together opposite walls (31) and (32) of a flat balloon (30) and at the same time cutting an aperture 26 through the walls, so as to form a central web 25 within an outer inflatable ring 24. The central web 25 is attached to a concave surface 19 on the forward surface of the mount 15 with the aperture 26 in the web aligned with an opening 22 in the mount.
Description
Laryngeal Mask Airways and their Manufacture
This invention relates to laryngeal mask airways and their manufacture
It is common practice to use an airway known as a laryngeal mask for the administration of anaesthetic and ventilation gases to a patient. These airways comprise a tube with an inflatable mask or cuff at one end, the tube being inserted in the patient's mouth so that one end is located in the hypopharynx and so that the mask forms a seal in this region with the surrounding tissue. Laryngeal masks are described in, for example, US 5355879, US 5305743, US 5297547, US 5282464, GB 2267034, US 5249571, US 5241956, US 5303697,
GB 2249959, GB 2111394, EP 448878, US 4995388, GB 2205499, GB 2128561 and
GB2298797.
Laryngeal masks have several advantages over endotracheal tubes, which are longer and seal with the trachea below the vocal folds. It can be difficult, however, to manufacture the patient end of the mask at low cost.
It is an object of the present invention to provide an improved laryngeal mask assembly and method of manufacture.
According to one aspect of the present invention there is provided a laryngeal mask assembly including a mask portion and an elongate tube that opens at its forward, patient end into the mask portion, the mask portion being adapted during use to locate in the hypopharynx and to open on its forward side to the patient's airway, the mask portion having a mount member attached with the patient end of the tube, the mount member being generally elliptical, the tube opening at the patient end of the assembly via an opening on the forward surface of the mount member, the mask portion having an expandable member comprising an expandable ring and a central web extending within said ring, and the web being attached to the forward surface of the mount member and having an aperture therein aligned with the opening in the mount member.
The forward surface of the mount member is preferably concave and the ring may project beyond the outer perimeter of the mount member.
According to another aspect of the present invention there is provided a method of manufacture of a laryngeal mask assembly of the kind including a mask portion and an elongate tube that opens at its forward, patient end into the mask portion, the mask portion being adapted during use to locate in the hypopharynx and to open on its forward side to the patient's airway, the method including the steps of providing a mount member at the patient end of the tube, forming an expandable member comprising an expandable ring and a web within the ring, and attaching the web to the mount member so as to secure the expandable member with the mount member.
The expandable member is preferably formed by providing an expandable balloon and joining opposite walls of the balloon together in a central region such that the region where the walls are joined together provides the web and the remainder of the balloon provides the expandable ring. The opposite walls are preferably joined together by heat sealing. The opposite walls may be joined together using a die on opposite sides of the balloon, the dies being provided with cutting formations to form an aperture in the web.
A laryngeal mask assembly and its method of manufacture, according to the present invention, will now be described, by way of example, with reference to the accompanying drawings, in which:
Figure 1 is a partly-sectional side elevation view of the assembly;
Figure 2 is a view of the forward end of the assembly along the arrow II ofFigure 1;
Figures 3 and 4 illustrate steps in the manufacture of the inflatable member.
With reference to Figures 1 and 2, the assembly comprises a bendable tube 1 of a plastics material, such as PVC, with a coupling 10 at its machine end 12. The tube 1 is curved along its length and has a mask portion 13 at its patient end 14.
The tube 1 is extruded with an inflation lumen 2 within its wall. The lumen 2 is connected towards the machine end of the assembly to an inflation line 3 with an inflation indicator and connector 4. The opposite, patient end of the inflation lumen 2 opens into the mask portion 13, through a hole or slot 5 formed in the outside of the tube 1.
The mask portion 13 comprises a mount member 15 and an expandable or inflatable assembly 16. The mount member 15 is moulded from a relatively stiff plastics material, such as PVC. The mount member 15 has a hollow cylindrical sleeve 17 at its rear end, in which the forward, patient end of the tube 1 is inserted and joined. The forward, patient end 18 of the mount member 15 is of an inverted dish shape with a generally elliptical or egg-shape outline and with a concave surface or recess 19. A bore 22 extends forwardly through the mount member 15, as a continuation of the bore through the sleeve 17, and forms an opening into the rear part of the recess 19. The hole or slot 5 in the tube 1 opens into a passage 23 through the mount member 15.
The inflatable assembly 16 comprises an expandable or inflatable outer ring 24 of circular section and egg shape with an integral, flexible, central web 25 within the ring. The ring 24 could have other shape sections, such as oval or elliptical. The diameter of the ring 24 towards the rear, machine end is slightly greater than that at the forward, patient end. The web 25 has the same shape as the underside of the mount member 15, that is, it is concave when viewed from beneath. An aperture 26 through the web 25 is aligned with the opening of the bore 22 in the mount member 15. A spigot 27 projects upwardly from the ring 24 and is sealed within the passage 23 in the mount member 15 so that the inflation lumen 2 opens into the ring 24. The inflatable member 16 is attached to the mount member 15 by means of an adhesive between the upper surface of the web 25 and the surface of the recess 19 so that the ring 24 projects beyond the mount member around its perimeter. Adhesive is also applied in the region of the passage 23, where the mount member has a shallow concave recess 28 shaped to receive a part of the ring 24 around the spigot 27.
The inflatable member 16 can be readily manufactured from a flexible plastics material, such as PVC, polyurethane, silicone, EVA, TPE, polyether block amide or the like.
In one method of manufacture, a flat balloon 30 is first blow moulded having the egg-shape outline of the assembly but with substantially flat upper and lower surfaces 31 and 32 and an open interior 33, as shown in Figure 3. The balloon 30 is then placed between two dies 34 and 35, which are brought together to force the upper and lower surfaces 31 and 32 into contact in the central region only, leaving the surfaces separate in the peripheral region, as shown in
Figure 4. The dies 34 and 35 are heated so that the upper and lower surface heat bond together in the central region to form the web 25, the peripheral region outside the central region forming the inflatable ring. Alternatively, the bond could be made by RF welding. The die surfaces have complementary profiles, defining the finished shape of the web, and cutting edges 36 to form the aperture 26 in the web. The spigot 27 may be formed during the initial blow moulding process or attached subsequently. The aperture 26 could have a series of holes or slits to prevent entry of the epiglottis.
The airway can be easily manufactured in this way at low cost.
The expandable member 16 could contain a foam material so that it naturally adopts an inflated or expanded state and is deflated by the action of suction. The foam may be inserted in the ring after attaching the expandable member to the mount member.
Claims (11)
1. A laryngeal mask assembly including a mask portion and an elongate tube that opens
at its forward, patient end into the mask portion, the mask portion being adapted
during use to locate in the hypopharynx and to open on its forward side to the patient" airway, wherein the mask portion has a mount member attached with the patient end
of the tube, the mount member being generally elliptical, wherein the tube opens at
the patient end of the assembly via an opening on the forward surface of the mount
member, wherein the mask portion has an expandable member comprising an
expandable ring and a central web extending within said ring, and wherein the web is
attached to the forward surface of the mount member and has an aperture therein
aligned with the opening in said mount member.
2. A laryngeal mask assembly according to Claim 1, wherein the forward surface of the
mount member is concave.
3. A laryngeal mask assembly according to Claim 1 or 2, wherein the ring projects
beyond the outer perimeter of the mount member.
4. A laryngeal mask assembly substantially as hereinbefore described with reference to
the accompanying drawings.
5. A method of manufacture of a laryngeal mask assembly of the kind including a mask
portion and an elongate tube that opens at its forward, patient end into the mask
portion, the mask portion being adapted during use to locate in the hypopharynx and
to open on its forward side to the patient's airway, the method including the steps of
providing a mount member at the patient end of the tube, forming an expandable
member comprising an expandable ring and a web within the ring, and attaching the
web to the mount member so as to secure the expandable member with the mount
member.
6. A method according to Claim 5, wherein the expandable member is formed by
providing an expandable balloon and joining opposite walls of the balloon together in
a central region such that the region where the walls are joined together provides said
web and the remainder of the balloon provides said expandable ring.
7. A method according to Claim 6. wherein the opposite walls of the balloon are joined
together by heat sealing.
8. A method according to Claim 6 or 7, wherein the opposite walls are joined together
using a die on opposite sides of the balloon, and wherein the dies are provided with
cutting formations to form an aperture in the web.
9. A method of manufacture of a laryngeal mask assembly substantially as hereinbefore
described with reference to the accompanying drawings.
l0. A laryngeal mask assembly made by a method according to any one of Claims 5 to 9.
11. Any novel and inventive feature as hereinbefore described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9722394A GB2318735B (en) | 1996-11-02 | 1997-10-24 | Laryngeal mask airways and their manufacture |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9622880.4A GB9622880D0 (en) | 1996-11-02 | 1996-11-02 | Laryngeal mask airways and thier manufacture |
| GB9722394A GB2318735B (en) | 1996-11-02 | 1997-10-24 | Laryngeal mask airways and their manufacture |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9722394D0 GB9722394D0 (en) | 1997-12-24 |
| GB2318735A true GB2318735A (en) | 1998-05-06 |
| GB2318735B GB2318735B (en) | 2000-04-19 |
Family
ID=26310329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9722394A Expired - Lifetime GB2318735B (en) | 1996-11-02 | 1997-10-24 | Laryngeal mask airways and their manufacture |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2318735B (en) |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2371990A (en) * | 2000-12-22 | 2002-08-14 | Smiths Group Plc | Laryngeal Mask Assemblies |
| US6439232B1 (en) | 1998-08-13 | 2002-08-27 | Archibald Ian Jeremy Brain | Laryngeal mask airway device |
| US6705318B1 (en) | 1999-04-09 | 2004-03-16 | Archibald I. J. Brain | Disposable LMA |
| US6792948B2 (en) | 2003-01-22 | 2004-09-21 | Archibald I. J. Brain | Laryngeal mask airway device with airway tube having flattened outer circumference and elliptical inner airway passage |
| US6918388B2 (en) | 1997-07-25 | 2005-07-19 | The Laryngeal Mask Company Limited | Intubating laryngeal mask |
| US7004169B2 (en) | 1999-10-07 | 2006-02-28 | Indian Ocean Medical Inc. | Laryngeal mask with large-bore gastric drainage |
| US7047973B2 (en) * | 2004-10-12 | 2006-05-23 | Ti-Li Chang | Laryngeal mask airway |
| US7128071B2 (en) | 2003-09-10 | 2006-10-31 | Indian Ocean Medical Inc. | Intubating laryngeal mask airway device with fiber optic assembly |
| US7134431B2 (en) | 2003-09-08 | 2006-11-14 | Indian Ocean Medical Inc. | Laryngeal mask airway device with position controlling tab |
| US7156100B1 (en) | 1998-10-06 | 2007-01-02 | 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 |
| US9265904B2 (en) | 2009-07-06 | 2016-02-23 | Teleflex Life Sciences | Artificial airway |
| US9480806B2 (en) | 2006-12-14 | 2016-11-01 | The Laryngeal Mask Company Ltd. | Laryngeal mask airway device with drug delivery means |
| US9528897B2 (en) | 2009-08-13 | 2016-12-27 | Chimden Medical Pty Ltd | Pressure indicator |
| US9662465B2 (en) | 2005-05-27 | 2017-05-30 | The Laryngeal Mask Company Ltd. | Laryngeal mask airway device |
| US9675772B2 (en) | 2010-10-15 | 2017-06-13 | The Laryngeal Mask Company Limited | Artificial airway device |
| US9974912B2 (en) | 2010-10-01 | 2018-05-22 | Teleflex Life Sciences Unlimited Company | Artificial airway device |
| USD861853S1 (en) | 2017-02-27 | 2019-10-01 | Teleflex Life Sciences Unlimited Company | Laryngeal mask and fixation device set |
| US10549054B2 (en) | 2011-02-02 | 2020-02-04 | Teleflex Life Sciences Unlimited Company | Artificial airway |
| US10576229B2 (en) | 2009-03-03 | 2020-03-03 | The Laryngeal Mask Company Limited | Artificial airway device |
| US10806327B2 (en) | 2011-11-30 | 2020-10-20 | Teleflex Life Sciences Pte, Ltd. | Laryngeal mask for use with an endoscope |
| EP2241345B2 (en) † | 1999-04-09 | 2022-04-13 | The Laryngeal Mask Company Limited | Disposable Laryngeal Mask Airway Device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7331346B2 (en) | 1997-12-24 | 2008-02-19 | Indian Ocean Medical, Inc. | Monitoring and control for a laryngeal mask airway device |
| GB9727367D0 (en) | 1997-12-24 | 1998-02-25 | Brain Archibald Ian Jeremy | Improvements in laryngeal mask airway devices |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4509514A (en) * | 1981-12-16 | 1985-04-09 | Brain Archibald Ian Jeremy | Artificial airway device |
| GB2205499A (en) * | 1987-06-05 | 1988-12-14 | Archibald Ian Jeremy Brain | Artificial airway device |
| EP0389272A2 (en) * | 1989-03-22 | 1990-09-26 | Archibald Ian Jeremy Dr. Brain | Artifical airway device |
| EP0448878A2 (en) * | 1990-02-27 | 1991-10-02 | Archibald Ian Jeremy Dr. Brain | Artificial airway device |
| US5303697A (en) * | 1991-02-11 | 1994-04-19 | Brain Archibald Ian Jeremy | Artificial airway device |
| US5305743A (en) * | 1992-03-05 | 1994-04-26 | Brain Archibald Ian Jeremy | Artificial airway device |
| US5391248A (en) * | 1992-03-05 | 1995-02-21 | Brain; Archibald I. J. | Method of making an artificial airway device |
| WO1997012640A1 (en) * | 1995-10-03 | 1997-04-10 | Archibald Ian Jeremy Brain | Artificial airway device |
-
1997
- 1997-10-24 GB GB9722394A patent/GB2318735B/en not_active Expired - Lifetime
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4509514A (en) * | 1981-12-16 | 1985-04-09 | Brain Archibald Ian Jeremy | Artificial airway device |
| GB2205499A (en) * | 1987-06-05 | 1988-12-14 | Archibald Ian Jeremy Brain | Artificial airway device |
| EP0389272A2 (en) * | 1989-03-22 | 1990-09-26 | Archibald Ian Jeremy Dr. Brain | Artifical airway device |
| EP0448878A2 (en) * | 1990-02-27 | 1991-10-02 | Archibald Ian Jeremy Dr. Brain | Artificial airway device |
| US5303697A (en) * | 1991-02-11 | 1994-04-19 | Brain Archibald Ian Jeremy | Artificial airway device |
| US5305743A (en) * | 1992-03-05 | 1994-04-26 | Brain Archibald Ian Jeremy | Artificial airway device |
| US5391248A (en) * | 1992-03-05 | 1995-02-21 | Brain; Archibald I. J. | Method of making an artificial airway device |
| WO1997012640A1 (en) * | 1995-10-03 | 1997-04-10 | Archibald Ian Jeremy Brain | Artificial airway device |
Cited By (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6918388B2 (en) | 1997-07-25 | 2005-07-19 | The Laryngeal Mask Company Limited | Intubating laryngeal mask |
| US6439232B1 (en) | 1998-08-13 | 2002-08-27 | Archibald Ian Jeremy Brain | Laryngeal mask airway device |
| US7305985B2 (en) | 1998-08-13 | 2007-12-11 | The Laryngeal Mask Company Limited | Laryngeal mask airway device |
| US9694150B2 (en) | 1998-08-13 | 2017-07-04 | The Laryngeal Mask Company Limited | Laryngeal mask airway device |
| US7156100B1 (en) | 1998-10-06 | 2007-01-02 | The Laryngeal Mask Company Ltd. | Laryngeal mask airway device |
| US7097802B2 (en) | 1999-04-09 | 2006-08-29 | Indian Ocean Medical Inc. | Disposable LMA |
| US6705318B1 (en) | 1999-04-09 | 2004-03-16 | Archibald I. J. Brain | Disposable LMA |
| EP2241345B2 (en) † | 1999-04-09 | 2022-04-13 | The Laryngeal Mask Company Limited | Disposable Laryngeal Mask Airway Device |
| US7004169B2 (en) | 1999-10-07 | 2006-02-28 | Indian Ocean Medical Inc. | Laryngeal mask with large-bore gastric drainage |
| GB2371990B (en) * | 2000-12-22 | 2004-06-16 | Smiths Group Plc | Laryngeal mask assemblies |
| GB2371990A (en) * | 2000-12-22 | 2002-08-14 | Smiths Group Plc | Laryngeal Mask Assemblies |
| US7159589B2 (en) | 2001-08-23 | 2007-01-09 | Indian Ocean Medical Inc. | Disposable laryngeal mask airway device |
| US6792948B2 (en) | 2003-01-22 | 2004-09-21 | Archibald I. J. Brain | Laryngeal mask airway device with airway tube having flattened outer circumference and elliptical inner airway passage |
| EP2165727A3 (en) * | 2003-09-08 | 2014-05-21 | The Laryngeal Mask Company Limited | Laryngeal Mask Airway Device with Position Controlling Tab |
| US7134431B2 (en) | 2003-09-08 | 2006-11-14 | Indian Ocean Medical Inc. | Laryngeal mask airway device with position controlling tab |
| US7896007B2 (en) | 2003-09-10 | 2011-03-01 | Indian Ocean Medical Inc. | Intubating laryngeal mask airway device with fiber optic assembly |
| US7128071B2 (en) | 2003-09-10 | 2006-10-31 | Indian Ocean Medical Inc. | Intubating laryngeal mask airway device with fiber optic assembly |
| US7047973B2 (en) * | 2004-10-12 | 2006-05-23 | Ti-Li Chang | Laryngeal mask airway |
| US9662465B2 (en) | 2005-05-27 | 2017-05-30 | The Laryngeal Mask Company Ltd. | Laryngeal mask airway device |
| US9480806B2 (en) | 2006-12-14 | 2016-11-01 | The Laryngeal Mask Company Ltd. | Laryngeal mask airway device with drug delivery means |
| US10576229B2 (en) | 2009-03-03 | 2020-03-03 | The Laryngeal Mask Company Limited | Artificial airway device |
| US9265904B2 (en) | 2009-07-06 | 2016-02-23 | Teleflex Life Sciences | Artificial airway |
| US10576230B2 (en) | 2009-07-06 | 2020-03-03 | Teleflex Life Sciences Unlimited Company | Artificial airway |
| US9528897B2 (en) | 2009-08-13 | 2016-12-27 | Chimden Medical Pty Ltd | Pressure indicator |
| US10126197B2 (en) | 2009-08-13 | 2018-11-13 | Teleflex Life Sciences | Pressure indicator |
| US9974912B2 (en) | 2010-10-01 | 2018-05-22 | Teleflex Life Sciences Unlimited Company | Artificial airway device |
| US10842962B2 (en) | 2010-10-15 | 2020-11-24 | Teleflex Life Sciences Pte. Ltd. | Artificial airway device |
| US9675772B2 (en) | 2010-10-15 | 2017-06-13 | The Laryngeal Mask Company Limited | Artificial airway device |
| US10549054B2 (en) | 2011-02-02 | 2020-02-04 | Teleflex Life Sciences Unlimited Company | Artificial airway |
| US10806327B2 (en) | 2011-11-30 | 2020-10-20 | Teleflex Life Sciences Pte, Ltd. | Laryngeal mask for use with an endoscope |
| USD861853S1 (en) | 2017-02-27 | 2019-10-01 | Teleflex Life Sciences Unlimited Company | Laryngeal mask and fixation device set |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2318735B (en) | 2000-04-19 |
| GB9722394D0 (en) | 1997-12-24 |
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