GB2371990A - Laryngeal Mask Assemblies - Google Patents

Laryngeal Mask Assemblies Download PDF

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Publication number
GB2371990A
GB2371990A GB0127184A GB0127184A GB2371990A GB 2371990 A GB2371990 A GB 2371990A GB 0127184 A GB0127184 A GB 0127184A GB 0127184 A GB0127184 A GB 0127184A GB 2371990 A GB2371990 A GB 2371990A
Authority
GB
United Kingdom
Prior art keywords
tube
mount
laryngeal mask
mask assembly
sealing 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
GB0127184A
Other versions
GB2371990B (en
GB0127184D0 (en
Inventor
Michael Norman Collins
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.)
Smiths Group PLC
Original Assignee
Smiths Group PLC
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 Smiths Group PLC filed Critical Smiths Group PLC
Publication of GB0127184D0 publication Critical patent/GB0127184D0/en
Publication of GB2371990A publication Critical patent/GB2371990A/en
Application granted granted Critical
Publication of GB2371990B publication Critical patent/GB2371990B/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

Abstract

A laryngeal mask has a tube 1 and mount 20 integrally moulded from polyurethane as a single piece. A sealing cuff 21 is attached to the mount 20 separately. An inflation line 40 extends in a groove 41 along the outside of the tube 41 and opens at one end into the cuff 21 so that it can be inflated and deflated.

Description

LARYNGEAL MASK ASSEMBLIES
This invention relates to laryngeal mask assemblies and their manufacture It is common practice to use an airway known as a laryngeal mask for administering 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,US5297547,US5282464,GB2267034,US5249571,US5241956, US5303697,
GB2249959,GB2111394,EP448878,US4995388,GB2205499,GB2128561,
GB2298797,GB2334215,GB2337020,PCT/GBOO/03044,PCT/GBOO/03045,GB0002805
and GB0020274. Laryngeal masks usually comprise a curved, extruded tube, a separate mount member joined at the patient end of the tube and an inflatable cuff attached to the mount member.
Laryngeal masks have several advantages over endotracheal tubes, which are longer and seal with the trachea below the vocal folds. The multiple components and assembly operations needed to make the masks, however, add to their cost.
It is an object of the present invention to provide an alternative laryngeal mask assembly.
i 2 According to one aspect of the present invention there is provided a laryngeal mask assembly comprising a tube, a mount at the patient end of the tube, and an annular sealing cuff extending around the patient end of the mount, the tube and mount being moulded together as an integral, single-piece component.
The sealing cuff may be attached with the mount by an adhesive. The sealing cuff is preferably inflatable and deflatable by means of an inflation line, the inflation line extending in a groove along the outside of the tube. The tube and mount may be moulded of polyurethane. According to another aspect of the present invention there is provided a method of manufacture of a laryngeal mask assembly comprising the steps of moulding a tube and a mount integrally with the tube and subsequently attaching a sealing cuff with the mount.
According to a further aspect of the present invention there is provided a laryngeal mask assembly made by the method of the above other aspect of the invention.
A laryngeal mask assembly according to the present invention will now be described, by way of example, with reference to the accompanying drawing, which is a side elevation view of the assembly.
The laryngeal mask assembly comprises a tube 1 and a mask formation 2 at the patient end 10 of the tube.
The tube 1 is of a bendable plastics material, such as PVC and is curved along its length. A bore 11 extends along the tube from its patient end 10 to its rear, machine end 12.
The mask 2 comprises a mount 20 and an inflatable sealing cuff 21. The mount 20 is of a relatively stiff plastics material and is of generally shoe shape. The mount 20 and tube 1 are moulded together, such as by injection moulding, to form an integral, single piece 22. The mount 20 tapers outwardly from its machine end 23 to its patient end 24, which is inclined to the axis of the machine end at an angle of about 25 so that the patient end of the mount has an oval shape with its forward end 25 being more pointed than its rear end 26. The patient end 24 of the mount 20 is inclined to face towards the inner side of the curve of the tube 1.
Internally, the mount 20 has a cavity 27 that increases in crosssectional area along its length, from the machine end.
The cuff21 is tubular and of a thin flexible plastics material. The cuff 21 is formed into an annulus of the same shape as the patient end 24 of the mount 20 so that it is oval with its forwardly-directed end 30 being more pointed than its rearwardly-directed end 31. The cuff 21 encloses a central region 32 of the same shape as the patient end 24 of the mount 20.
The cuff21 is attached around the patient end 24 ofthe mount 20 such as by means of an adhesive. The cuff 21 is inflated and deflated by means of an inflation line 40 which is provided by a separate small-bore tube communicating with the interior of the cuff and extending rearwardly along a groove 41 in the outside of the tube. When inflated in position in a patient, the cuff 21 expands to contact patient tissue in the region of the hypopharnyx.
Because the mount and tube are formed in one operation, there are fewer separate components and fewer steps needed to manufacture the assembly. By avoiding the need to bond the mount to the tube, there is no risk of a faulty bond and there is no need to inspect a bond. It is possible to achieve a smooth external profile in the region between the tube and mount, without a step or bump, because there is no connection in this region. Moulding the tube and mount together enables the wall thickness or shape to be varied, if desired, at different points along the length of the tube. It is also possible, by moulding, to use different materials, such as polyurethane, which present problems with extrusion.

Claims (9)

1. A laryngeal mask assembly comprising a tube, a mount at the patient end of the tube, and an annular sealing cuff extending around the patient end of the mount, wherein the tube and mount are moulded together as an integral, single-piece component.
2. A laryngeal mask assembly according to Claim 1, wherein the sealing cuff is attached
with the mount by an adhesive.
3. A laryngeal mask assembly according to Claim 1 or 2, wherein the sealing cuff is inflatable and deflatable by means of an inflation line, and wherein the inflation line extends in a groove along the outside of the tube.
4. A laryngeal mask assembly according to any one of the preceding claims, wherein the tube and mount are moulded of polyurethane.
5. A laryngeal mask substantially as hereinbefore described with reference to the accompanying drawing.
6. A method of manufacture of a laryngeal mask assembly comprising the steps of moulding a tube and a mount integrally with the tube, and subsequently attaching a sealing cuff with the mount.
7. A method of manufacture of a laryngeal mask assembly substantially as hereinbefore described with reference to the accompanying drawing.
8. A laryngeal mask assembly made by a method according to Claim 6 or 7.
9. Any novel and inventive feature or combination of features as hereinbefore described.
GB0127184A 2000-12-22 2001-11-13 Laryngeal mask assemblies Expired - Fee Related GB2371990B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB0031661.2A GB0031661D0 (en) 2000-12-22 2000-12-22 Laryngeal mask assemblies

Publications (3)

Publication Number Publication Date
GB0127184D0 GB0127184D0 (en) 2002-01-02
GB2371990A true GB2371990A (en) 2002-08-14
GB2371990B GB2371990B (en) 2004-06-16

Family

ID=9905905

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB0031661.2A Ceased GB0031661D0 (en) 2000-12-22 2000-12-22 Laryngeal mask assemblies
GB0127184A Expired - Fee Related GB2371990B (en) 2000-12-22 2001-11-13 Laryngeal mask assemblies

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB0031661.2A Ceased GB0031661D0 (en) 2000-12-22 2000-12-22 Laryngeal mask assemblies

Country Status (7)

Country Link
US (2) US20020078961A1 (en)
EP (1) EP1219316B1 (en)
JP (1) JP4629934B2 (en)
AU (1) AU780207B2 (en)
CA (1) CA2363893A1 (en)
DE (1) DE60129198T2 (en)
GB (2) GB0031661D0 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2409163A (en) * 2003-12-18 2005-06-22 Smiths Group Plc A laryngeal mask having a tube partially reinforced by helical metal wire
US9480806B2 (en) 2006-12-14 2016-11-01 The Laryngeal Mask Company Ltd. Laryngeal mask airway device with drug delivery means
US9498591B2 (en) 2005-05-27 2016-11-22 The Laryngeal Mask Company Ltd. Laryngeal mask airway device with a support for preventing occlusion
US9528897B2 (en) 2009-08-13 2016-12-27 Chimden Medical Pty Ltd Pressure indicator
US9675772B2 (en) 2010-10-15 2017-06-13 The Laryngeal Mask Company Limited Artificial airway device
US9694150B2 (en) 1998-08-13 2017-07-04 The Laryngeal Mask Company Limited Laryngeal mask 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
US10576229B2 (en) 2009-03-03 2020-03-03 The Laryngeal Mask Company Limited Artificial airway device
US10576230B2 (en) 2009-07-06 2020-03-03 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
EP2241345B2 (en) † 1999-04-09 2022-04-13 The Laryngeal Mask Company Limited Disposable Laryngeal Mask Airway Device

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7159589B2 (en) * 2001-08-23 2007-01-09 Indian Ocean Medical Inc. Disposable laryngeal mask airway device
US6705322B2 (en) * 2002-03-11 2004-03-16 Ti-Li Chang Laryngeal mask airway
GB0218631D0 (en) * 2002-08-10 2002-09-18 Smiths Group Plc Laryngeal masks
GB0218868D0 (en) 2002-08-14 2002-09-25 Nasir Muhammed A Improved airway management device
TWM240225U (en) * 2003-04-10 2004-08-11 Di-Li Jang Improved throat mask
EP2594304B1 (en) 2003-04-11 2014-12-24 Ambu A/S Laryngeal mask and method for the manufacture thereof
GB2404863B (en) * 2003-08-14 2008-05-14 Muhammed Aslam Nasir Improved airway device
US7096868B2 (en) * 2004-03-09 2006-08-29 Nellcor Puritan Bennett Incorporated Laryngeal airway device
GB0810169D0 (en) * 2008-06-04 2008-07-09 Cosmeplast Ets Improvements relating to respiratory interface devices
USD665495S1 (en) 2009-07-14 2012-08-14 Muhammed Aslam Nasir Medical device
GB201010647D0 (en) 2010-06-24 2010-08-11 Docsinnovent Ltd Stopper device
USD665254S1 (en) 2011-06-08 2012-08-14 Intersurgical Ag Airway device packaging
USD693920S1 (en) 2011-06-08 2013-11-19 Intersurgical Ag Airway device
USD688787S1 (en) 2011-06-08 2013-08-27 Intersurgical Ag Airway device cap and strap holder
USD712244S1 (en) 2011-09-23 2014-09-02 Intersurgical Ag Medical device package
GB201201438D0 (en) 2012-01-27 2012-03-14 Docsinnovent Ltd Improved stopper device
USD761952S1 (en) 2012-07-27 2016-07-19 Docsinnovent Limited Airway device
CH706616A2 (en) * 2012-06-04 2013-12-13 Deltona Innovations Ag Laryngeal mask with a supraglottic tube.
GB2555360B (en) 2013-12-17 2018-10-10 Intersurgical Ag Intubating Airway Device
USD842456S1 (en) 2015-12-15 2019-03-05 Intersurgical Ag Airway device
GB201720733D0 (en) 2017-12-13 2018-01-24 Ashkal Development Ltd Airway device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2317830A (en) * 1996-10-03 1998-04-08 Smiths Industries Plc Laryngeal mask assembly
GB2318735A (en) * 1996-11-02 1998-05-06 Smiths Industries Plc Laryngeal mask airway and manufacture thereof
GB2321854A (en) * 1997-02-05 1998-08-12 Smiths Industries Plc Laryngeal mask
GB2324737A (en) * 1997-05-03 1998-11-04 Smiths Industries Plc Laryngeal mask assembly
EP0875492A1 (en) * 1997-03-27 1998-11-04 Basf Aktiengesellschaft Elongate fire-proof material
EP0880975A2 (en) * 1997-05-03 1998-12-02 Smiths Industries Public Limited Company Laryngeal mask assemblies
EP0922465A2 (en) * 1997-12-02 1999-06-16 Smiths Industries Public Limited Company Laryngeal mask assemblies
EP0935971A2 (en) * 1998-02-17 1999-08-18 Smiths Industries Public Limited Company Laryngeal mask airways and their manufacture

Family Cites Families (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2111394B (en) * 1981-12-16 1985-09-11 Archibald Ian Jeremy Brain Artificial airway device
GB9102821D0 (en) 1991-02-11 1991-03-27 Brain Archibald Ian Jeremy An intubating laryngeal mask airway
US5477852A (en) * 1991-10-29 1995-12-26 Airways Ltd., Inc. Nasal positive airway pressure apparatus and method
GB9204754D0 (en) 1992-03-05 1992-04-15 Brain Archibald Ian Jeremy Mould for manufacture of a laryngeal mask
US5241956A (en) 1992-05-21 1993-09-07 Brain Archibald Ian Jeremy Laryngeal mask airway with concentric drainage of oesophagus discharge
US5249571A (en) 1992-05-21 1993-10-05 Brain Archibald Ian Jeremy Laryngeal clamp airway
GB9215455D0 (en) 1992-07-21 1992-09-02 Brain Archibald Ian Jeremy A laryngeal mask airway adapted to carry a reflecting-type oximeter
US5297547A (en) 1992-07-30 1994-03-29 Brain Archibald Ian Jeremy Laryngeal mask construction
US5355879A (en) 1992-09-28 1994-10-18 Brain Archibald Ian Jeremy Laryngeal-mask construction
JP2779992B2 (en) * 1992-11-06 1998-07-23 暢 佐藤 Emergency resuscitation esophageal airway
US5540224A (en) * 1993-07-01 1996-07-30 Mallinckrodt Medical, Inc. Drug Delivery port endotracheal tube
GB2285765B (en) * 1994-01-12 1997-10-29 Archibald Ian Jeremy Brain Forming tool for use with a laryngeal mask
GB9505134D0 (en) * 1995-03-14 1995-05-03 Smiths Industries Plc Laryngeal mask airways
MY115052A (en) * 1995-10-03 2003-03-31 Archibald Ian Jeremy Brain Laryngeal mask airway incorporating an epiglottic elevating mechanism
US5791341A (en) * 1995-12-19 1998-08-11 Bullard; James Roger Oropharyngeal stent with laryngeal aditus shield and nasal airway with laryngeal aditus shield
GB9606012D0 (en) * 1996-03-22 1996-05-22 Brain Archibald Ian Jeremy Laryngeal mask with gastric-drainage feature
US5682880A (en) * 1996-07-26 1997-11-04 Brain; Archibald Ian Jeremy Laryngeal-mask airway with guide element, stiffener, and fiberoptic access
GB9619432D0 (en) * 1996-09-18 1996-10-30 Smiths Industries Plc Laryngeal mask assemblies
GB9620609D0 (en) * 1996-10-03 1996-11-20 Smiths Industries Plc Laryngeal mask airways and their manufacture
GB9622880D0 (en) * 1996-11-02 1997-01-08 Smiths Industries Plc Laryngeal mask airways and thier manufacture
GB9624029D0 (en) * 1996-11-19 1997-01-08 Smiths Industries Ltd Laryngeal mask airways and their manufacture
GB9705537D0 (en) * 1997-03-18 1997-05-07 Smiths Industries Plc Laryngeal mask assemblies
GB9705585D0 (en) * 1997-03-18 1997-05-07 Smiths Industries Plc Laryngeal mask assemlies
GB9705586D0 (en) * 1997-03-18 1997-05-07 Smiths Industries Plc Laryngeal mask assemblies
US5988167A (en) * 1997-05-02 1999-11-23 Kamen; Jack M. Foam cuff for laryngeal mask airway
US6079409A (en) * 1997-07-25 2000-06-27 Brain; Archibald Ian Jeremy Intubating laryngeal mask
GB9721840D0 (en) * 1997-10-16 1997-12-17 Smiths Industries Plc Laryngeal mask assemblies
GB9809897D0 (en) * 1998-05-09 1998-07-08 Smiths Industries Plc Laryngeal masks and manufacture
US6705318B1 (en) * 1999-04-09 2004-03-16 Archibald I. J. Brain Disposable LMA
CA2813505C (en) * 1999-04-09 2015-06-23 The Laryngeal Mask Company Limited Disposable laryngeal mask airway device
GB9920098D0 (en) * 1999-08-26 1999-10-27 Smiths Industries Plc Medico-surgical apparatus
GB9923628D0 (en) * 1999-10-06 1999-12-08 Smiths Industries Plc Laryngeal mask assemblies
GB0002805D0 (en) * 2000-02-08 2000-03-29 Smiths Industries Plc Masks and their manufacture
GB0103813D0 (en) * 2001-02-16 2001-04-04 Smiths Group Plc Laryngeal mask assemblies
EP2594304B1 (en) * 2003-04-11 2014-12-24 Ambu A/S Laryngeal mask and method for the manufacture thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2317830A (en) * 1996-10-03 1998-04-08 Smiths Industries Plc Laryngeal mask assembly
GB2318735A (en) * 1996-11-02 1998-05-06 Smiths Industries Plc Laryngeal mask airway and manufacture thereof
GB2321854A (en) * 1997-02-05 1998-08-12 Smiths Industries Plc Laryngeal mask
EP0875492A1 (en) * 1997-03-27 1998-11-04 Basf Aktiengesellschaft Elongate fire-proof material
GB2324737A (en) * 1997-05-03 1998-11-04 Smiths Industries Plc Laryngeal mask assembly
EP0880975A2 (en) * 1997-05-03 1998-12-02 Smiths Industries Public Limited Company Laryngeal mask assemblies
EP0922465A2 (en) * 1997-12-02 1999-06-16 Smiths Industries Public Limited Company Laryngeal mask assemblies
EP0935971A2 (en) * 1998-02-17 1999-08-18 Smiths Industries Public Limited Company Laryngeal mask airways and their manufacture

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9694150B2 (en) 1998-08-13 2017-07-04 The Laryngeal Mask Company Limited Laryngeal mask airway device
EP2241345B2 (en) † 1999-04-09 2022-04-13 The Laryngeal Mask Company Limited Disposable Laryngeal Mask Airway Device
GB2409163A (en) * 2003-12-18 2005-06-22 Smiths Group Plc A laryngeal mask having a tube partially reinforced by helical metal wire
GB2409163B (en) * 2003-12-18 2008-02-06 Smiths Group Plc Laryngeal mask assemblies
US9522245B2 (en) 2005-05-27 2016-12-20 The Laryngeal Mask Company Ltd. Laryngeal mask airway device and method of manufacture
US9662465B2 (en) 2005-05-27 2017-05-30 The Laryngeal Mask Company Ltd. Laryngeal mask airway device
US9498591B2 (en) 2005-05-27 2016-11-22 The Laryngeal Mask Company Ltd. Laryngeal mask airway device with a support for preventing occlusion
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
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
US9675772B2 (en) 2010-10-15 2017-06-13 The Laryngeal Mask Company Limited Artificial airway device
US10842962B2 (en) 2010-10-15 2020-11-24 Teleflex Life Sciences Pte. Ltd. Artificial airway device
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
AU780207B2 (en) 2005-03-10
DE60129198D1 (en) 2007-08-16
US20020078961A1 (en) 2002-06-27
EP1219316A3 (en) 2004-01-02
DE60129198T2 (en) 2007-11-08
US20050109345A1 (en) 2005-05-26
CA2363893A1 (en) 2002-06-22
EP1219316B1 (en) 2007-07-04
EP1219316A2 (en) 2002-07-03
JP2002200169A (en) 2002-07-16
GB0031661D0 (en) 2001-02-07
GB2371990B (en) 2004-06-16
AU9515101A (en) 2002-06-27
GB0127184D0 (en) 2002-01-02
JP4629934B2 (en) 2011-02-09

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Legal Events

Date Code Title Description
AT Applications terminated before publication under section 16(1)
AT Applications terminated before publication under section 16(1)

Free format text: ERRATA: PATENT APPLICATION GB0127184.0 WAS ANNOUNCED AS TERMINATED (BEFORE PUBLICATION) ON 9 JANUARY 2002, THIS TERMINATION WAS MADE IN ERROR AND THE APPLICATION HAS NOW BEEN REINSTATED.

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20161113