GB2323289A - Laryngeal mask assembly - Google Patents

Laryngeal mask assembly Download PDF

Info

Publication number
GB2323289A
GB2323289A GB9803800A GB9803800A GB2323289A GB 2323289 A GB2323289 A GB 2323289A GB 9803800 A GB9803800 A GB 9803800A GB 9803800 A GB9803800 A GB 9803800A GB 2323289 A GB2323289 A GB 2323289A
Authority
GB
United Kingdom
Prior art keywords
tube
member
opening
laryngeal mask
mask assembly
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
GB9803800A
Other versions
GB2323289B (en
GB9803800D0 (en
Inventor
Eric Pagan
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
Priority to GB9705537A priority Critical patent/GB9705537D0/en
Application filed by Smiths Group PLC filed Critical Smiths Group PLC
Priority to GB9803800A priority patent/GB2323289B/en
Publication of GB9803800D0 publication Critical patent/GB9803800D0/en
Publication of GB2323289A publication Critical patent/GB2323289A/en
Application granted granted Critical
Publication of GB2323289B publication Critical patent/GB2323289B/en
Anticipated expiration legal-status Critical
Application status is Expired - Fee Related legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/04Tracheal tubes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/04Tracheal tubes
    • A61M16/0402Special features for tracheal tubes not otherwise provided for
    • A61M16/0409Special features for tracheal tubes not otherwise provided for with mean for closing the oesophagus

Abstract

A laryngeal mask assembly has a tube with a mask portion at its patient end, the tube opening into the centre of the mask portion. The mask portion is formed by a mount 15 attached to the tubes and by a bag-shape cuff 16 attached to the mount. The mount 15 is formed with two laterally-projecting flaps 31 and 32 defining a dumbbell-shape opening to the tube. The flaps 31 and 32 deflect the epiglottis during insertion of the airway into the patient but can be deflected by a suction tube, or the like, inserted through the tube.

Description

Larsngeal Mask Assemblies This invention relates to laryngeal mask assemblies 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 GB 2298797.

Laryngeal masks have several advantages over endotracheal tubes, which are longer and seal with the trachea below the vocal folds. One problem with laryngeal mask airways, however, is that there is a risk that the epiglottis can enter the air passage through the airway during insertion, thereby causing a blockage. In GB-A-2205499 there is described a laryngeal mask having bars extending across the patient-end opening of the tube into the mask, to prevent the epiglottis entering the opening.

It is an object of the present invention to provide an improved laryngeal mask assembly.

According to the present invention there is provided a laryngeal mask assembly comprising a tube with a mask portion at its patient end, the tube having an opening into the centre of the mask portion, the mask portion having at least one flap member projecting laterally across a part only of said opening, so as to deflect the epiglottis away from the opening during insertion, and the flap member being deflectable by an elongate member inserted along the tube.

The mask portion preferably has two flap members projecting laterally towards one another from opposite sides, both flap members deflecting the epiglottis away from the opening and being deflectable by an elongate member inserted along the tube. The flap members may provide a dumbbell shape to the opening. The mask portion may comprise a mount member attached with the tube and a cuff attached with the mount member, the or each flap member being formed from the material of the mount member. The cuff may be a bagshape member attached with the mount member adjacent the or each flap member.

A laryngeal mask airway assembly according to the present invention, will now be described, by way of example, with reference to the accompanying drawing, in which: Figure 1 is a side elevation view of the assembly; Figure 2 is a sectional side elevation view of the patient end of the assembly to an enlarged scale; and Figure 3 is a view from below of the patient end of the assembly.

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.

The mask portion 13 comprises a mount member 15 and a flexible bag member 16.

The mount member 15 is moulded from a bendable 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 14 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 recess 19. The peripheral edge 20 of the mount member 15 is curved rearwardly to form a convex peripheral forward surface 21 lying on a flat plane inclined at an angle of about 30 to the axis of the patient end of the tube 1. The sleeve 17 has a bore 22 at its rear end communicating with the passage through the tube 1, and opens at its forward end into the recess 19.

The bag member 16 is blow moulded from a flexible, resilient plastics material, such as PVC, polyurethane, silicone, EVA, TPE, polyether block amide or the like. The bag 16 has a sock shape with an open ankle or neck portion 23 at its upper, rear end and an egg shape lower, forward foot portion 24 shaped with the same general outline as the mount member 15.

The bag 16 encompasses the forward end of the assembly, enclosing the entirety of the mount 15 and having its neck 23 attached to the outside of the forward end 14 of the tube 1, such as by solvent, adhesive or welding. The bag 16 is also attached to the concave recess 19 of the mount 15 along an annular band 26 extending around the opening of the bore 22, to seal the bag material to the mount. A hole 27 in the bag 16 provides an opening to the bore 22 in the mount member 15. The bag 16 provides an inflatable cuff at the forward end of the assembly and communicates with the inflation lumen 2 by means of an opening 28 cut through the outer surface of the tube 1 below the point where the bag is attached to the tube.

The mount member 15 also has an epiglottis deflector provided by two flaps 31 and 32, formed from the material of the mount member, just behind the hole 27 in the bag 16. The flaps 31 and 32 extend parallel to the plane containing the forward surface 21 of the mount member 15 and project laterally inwardly towards the major axis of the elliptical shape of the end of the mount member. The flaps 31 and 32 are of approximately semicircular shape and, at their closest separation, are spaced by a small gap 33. In this way, the opening into the tube 1 is divided into two pear-shape regions 34 and 35 separated by the gap 33, giving the opening into the bore through the tube a dumbbell or keyhole shape.

The stiffness of the material forming the two flaps 31 and 32 is sufficient to deflect the epiglottis during insertion of the mask assembly, but the flaps bend readily to allow a suction catheter, or the like to be inserted along the tube 1 and project from the mask portion.

Claims (7)

1. A laryngeal mask assembly comprising a tube with a mask portion at its patient end, the tube having an opening into the centre of the mask portion, wherein the mask portion has at least one flap member projecting laterally across a part only of said opening, so as to deflect the epiglottis away from the opening during insertion, and wherein said flap member is deflectable by an elongate member inserted along the tube.
2. A laryngeal mask assembly according to Claim 1, wherein the mask portion has two flap members projecting laterally towards one another from opposite sides, and wherein both said flap members deflect the epiglottis away from the opening and are deflectable by an elongate member inserted along the tube.
3. A laryngeal mask assembly according to Claim 2, wherein said flap members provide a dumbbell shape to said opening.
4. A laryngeal mask assembly according to any one of the preceding claims, wherein said mask portion comprises a mount member attached with said tube and a cuff attached with said mount member, and wherein the or each flap member is formed from the material of said mount member.
5. A laryngeal mask assembly according to Claim 4, wherein the cuff is a bag-shape member attached with said mount member adjacent the or each flap member.
6. A laryngeal mask assembly substantially as hereinbefore described with reference to the accompanying drawing.
7. Any novel and inventive feature as hereinbefore described.
GB9803800A 1997-03-18 1998-02-25 Laryngeal mask assemblies Expired - Fee Related GB2323289B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9705537A GB9705537D0 (en) 1997-03-18 1997-03-18 Laryngeal mask assemblies
GB9803800A GB2323289B (en) 1997-03-18 1998-02-25 Laryngeal mask assemblies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9803800A GB2323289B (en) 1997-03-18 1998-02-25 Laryngeal mask assemblies

Publications (3)

Publication Number Publication Date
GB9803800D0 GB9803800D0 (en) 1998-04-15
GB2323289A true GB2323289A (en) 1998-09-23
GB2323289B GB2323289B (en) 2001-02-14

Family

ID=26311213

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9803800A Expired - Fee Related GB2323289B (en) 1997-03-18 1998-02-25 Laryngeal mask assemblies

Country Status (1)

Country Link
GB (1) GB2323289B (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001013980A1 (en) * 1999-08-26 2001-03-01 Smiths Group Plc Laryngeal mask airway
GB2354950A (en) * 1999-10-06 2001-04-11 Smiths Industries Plc Laryngeal mask assembly
GB2324040B (en) * 1997-04-10 2001-06-06 Daniel J Cook Laryngeal mask
US6439232B1 (en) 1998-08-13 2002-08-27 Archibald Ian Jeremy Brain Laryngeal mask airway device
GB2373447A (en) * 2001-02-16 2002-09-25 Smiths Group Plc Laryngeal mask assembly
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
GB2405588A (en) * 2003-09-03 2005-03-09 Daniel James Cook Laryngeal mask
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
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
US9265904B2 (en) 2009-07-06 2016-02-23 Teleflex Life Sciences Artificial airway
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
US9974912B2 (en) 2010-10-01 2018-05-22 Teleflex Life Sciences Unlimited Company Artificial airway device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2205499A (en) * 1987-06-05 1988-12-14 Archibald Ian Jeremy Brain Artificial airway device
WO1997012641A1 (en) * 1995-10-03 1997-04-10 Archibald Ian Jeremy Brain Laryngeal mask airway incorporating an epiglottic elevating mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2205499A (en) * 1987-06-05 1988-12-14 Archibald Ian Jeremy Brain Artificial airway device
WO1997012641A1 (en) * 1995-10-03 1997-04-10 Archibald Ian Jeremy Brain Laryngeal mask airway incorporating an epiglottic elevating mechanism

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2324040B (en) * 1997-04-10 2001-06-06 Daniel J Cook Laryngeal mask
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
US9694150B2 (en) 1998-08-13 2017-07-04 The Laryngeal Mask Company Limited Laryngeal mask airway device
US7305985B2 (en) 1998-08-13 2007-12-11 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
WO2001013980A1 (en) * 1999-08-26 2001-03-01 Smiths Group Plc Laryngeal mask airway
AU772557B2 (en) * 1999-10-06 2004-04-29 Smiths Group Plc Laryngeal mask assemblies
FR2799377A1 (en) * 1999-10-06 2001-04-13 Smiths Industries Plc a laryngeal mask assembly
GB2354950A (en) * 1999-10-06 2001-04-11 Smiths Industries Plc Laryngeal mask assembly
GB2354950B (en) * 1999-10-06 2004-03-10 Smiths Industries Plc Laryngeal mask assemblies
US7004169B2 (en) 1999-10-07 2006-02-28 Indian Ocean Medical Inc. Laryngeal mask with large-bore gastric drainage
GB2373447A (en) * 2001-02-16 2002-09-25 Smiths Group Plc Laryngeal mask assembly
GB2373447B (en) * 2001-02-16 2004-10-20 Smiths Group Plc Laryngeal mask assemblies
US6761170B2 (en) 2001-02-16 2004-07-13 Smiths Group Plc Laryngeal mask assemblies
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
GB2405588A (en) * 2003-09-03 2005-03-09 Daniel James Cook Laryngeal mask
US7134431B2 (en) 2003-09-08 2006-11-14 Indian Ocean Medical Inc. Laryngeal mask airway device with position controlling tab
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
US9498591B2 (en) 2005-05-27 2016-11-22 The Laryngeal Mask Company Ltd. Laryngeal mask airway device with a support for preventing occlusion
US9265904B2 (en) 2009-07-06 2016-02-23 Teleflex Life Sciences 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

Also Published As

Publication number Publication date
GB9803800D0 (en) 1998-04-15
GB2323289B (en) 2001-02-14

Similar Documents

Publication Publication Date Title
US8778248B2 (en) Method of manufacturing an airway device
CA2141167C (en) Esophageal-tracheal double lumen airway
RU2406544C2 (en) Air conducting device in form of laryngeal mask
ES2202473T3 (en) artificial intubation device.
US7331347B2 (en) Retainer for laryngeal mask
AU785498B2 (en) Laryngeal mask airway incorporating an epiglottic elevating mechanism
CN1213777C (en) Laryngeal Mask with large-bore gastric drainage
CA2558646C (en) Laryngeal airway device
JP4884218B2 (en) Laryngeal mask
CA2650214C (en) Laryngeal mask airway device
US6698428B2 (en) Endotracheal tube construction
US6918388B2 (en) Intubating laryngeal mask
US5791341A (en) Oropharyngeal stent with laryngeal aditus shield and nasal airway with laryngeal aditus shield
US7762261B1 (en) Combination artificial airway device and esophageal obturator
EP0906766A1 (en) Tracheal tube devices
US7013899B2 (en) Perilaryngeal oral airway with multi-lumen esophogeal-obturator
US6152136A (en) Cuffed tube assemblies
JP2918338B2 (en) Laryngeal mask for the respiratory tract, the concentric discharge of effluent from the esophagus
US5201310A (en) Medico-surgical tube with sealing cuff and a suction lumen at the top of the cuff
ES2383896T3 (en) Enhanced airway device
US7040322B2 (en) Combination artificial airway device and esophageal obturator
CA2012750C (en) Artificial airway device
DE19739123B4 (en) Larynxmaskenvorrichtung
JP3251589B2 (en) Vent pipe for sleeves with oropharyngeal
US5303697A (en) Artificial airway device

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20110225