GB2249959A - Artificial airway device - Google Patents

Artificial airway device Download PDF

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Publication number
GB2249959A
GB2249959A GB9025193A GB9025193A GB2249959A GB 2249959 A GB2249959 A GB 2249959A GB 9025193 A GB9025193 A GB 9025193A GB 9025193 A GB9025193 A GB 9025193A GB 2249959 A GB2249959 A GB 2249959A
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GB
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Patent type
Prior art keywords
lt
rti
mask
laryngeal
tube
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.)
Withdrawn
Application number
GB9025193A
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GB9025193D0 (en )
Inventor
Archibald Ian Jeremy Brain
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Archibald Ian Jeremy Brain
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
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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 seal between a laryngeal mask airway device and the entrance to the larynx, which is sufficient to overcome the danger of aspiration of regurgitated or vomited matter into the lungs, is provided by:- (a) making the airway tube 7 as a flexible metallic structure, or (b) magnetic or electromagnetic attraction of the mask 1, or (c) adhesive attachment of the mask around the larynx entrance, or (d) a spring clamp 2, 3, 4 or (e) making the airway tube 7 as a coiled tube, which can be drawn into a tighter curve by tensioning a cable running along the tube. <IMAGE>

Description

DESORIPTION OF THE INVENTION TITLE: A LARYNGEAL OLAMP FIELD: ANAESTHESIA PRIOR ART: The LARYNGEAL MASK AIRWAY (Patent GB 2111394B and Patent Application 8713173) is an artificial airway device designed to facilitate lung ventilation in an unconscious patient by forming a low-pressure seal around the laryngeal inlet, using an appropriately shaped mask which fits into the lower <RTI>pharyn,</RTI> and is <RTI>attached</RTI> to a tube which emerges from the mouth for connection to medical gas supply <RTI>tubino.</RTI>

In practice this device has been successful and is now in daily use in hospitals throughout the United Kingdom. It has been found effective in achieving a reliable airway, preventing obstruction in the unconscious patient and is especially useful in cases where difficulty with the airway is experienced. It has been found to <RTI>Prevent</RTI> the contamination of the lungs by blood or debris during surgery of the nose or throat, but it has become apparent that an important contra-indication to its use is <RTI>th-</RTI> patient who is at risk from vomiting or regurgitation of stomach <RTI>content</RTI> while unconscious.Although forming a <RTI>oal</RTI> around <RTI>ths</RTI> laryngeal inlet sufficient to permit inflation of the lungs during artificial ventilation, the seal is not <RTI>suffici,-nt</RTI> to <RTI>prevent</RTI> lung contamination in the <RTI>eent</RTI> of retching, vomiting or regurgitation. Patients who are not adequately starved prior to surgery are thus not suitable for <RTI>use</RTI> of the <RTI>larynaeal</RTI> mask. In such Patients, an <RTI>endotracheal</RTI> tube is still regarded as affording the safest protection to the patient's airways. However, insertion of an endotracheal tube is not always without difficulty and failure sometimes leads to death or brain damage.In such cases the laryngeal mask has proven <RTI>life-savinfg.</RTI> It has also been found possible to pass a tube through the laryngeal mask into the trachea, thus providing the necessary protection in cases when the passage of such a tube is found impossible without using the laryngeal mask as a guide.

Other means of preventing aspiration of <RTI>astric</RTI> contents into the lungs while using a laryngeal mask are described in my <RTI>EuroPean</RTI> Patent <RTI>AsPlication</RTI> No <RTI>?03030O3.s,</RTI> published 26/9/90 with publication number EPO 389 272 A2 (Date of filing <RTI>21/3/90).</RTI> In essence, such means rely on a combination of improvement in seal pressure against the larynx and provision of drainage tubes to duct gastric contents away from the laryngeal inlet.

THE PRESENT <RTI>INVENTION,</RTI> In the present invention, the aim is the same as that of my European Patent Application <RTI>90303063.3,</RTI> namelY to prevent lung soiling by gastric <RTI>contents</RTI> but the means is entirely different.

PRINCIPLE: The principle is to make the pressure which is exerted by the mask against the larynx <RTI>indPpendent</RTI> of the <RTI>counterpressure</RTI> exerted by the surrounding anatomical structures. The existing Laryngeal Mask is <RTI>designed</RTI> to fit quite accurately into the lower pharynx, so that when inflated, <RTI>pressure</RTI> is exerted on all the <RTI>surrounding</RTI> structures to greater or lesser degrees depending on the resistance they offer to <RTI>displacement.</RTI> In broad terms, the structures in front of the mask are cartilaginous, those surrounding it are muscular and those behind it are bony.

Inflation of the mask therefore results in the cartilaginous structures of the larynx being pushed forwards away from the bony structures of the vertebrae of the the <RTI>neck,</RTI> stretching and tensioning the surrounding muscles. The seal generated against the laryngeal inlet thus depends to some extent on the resistance of the muscles and soft tissues to being stretched as the mask's cuff volume expands.

If an unconscious patient retches, vomits or regurgitates gastric contents, this balance of forces is upset. Fluid or semisolids are forced upwards through the oesophagus while the sphincteric mechanism at the lower end of the mask and the muscles surrounding the mask relax, with consequent loss of <RTI>seal.</RTI> The larynx itself is displaced upwards as part of the vomiting or retching reflex. This movement may be sufficient to disrupt the seal of the mask against it. of crucial importance however, is the fact that the tube attached to the mask offers resistance to flexion when in its normal position in the patients pharynx. The tube thus exerts a constant force against the bony posterior walls of the pharynx.This means that in the event of a relaxation of the surrounding structures, the mask will tend to remain firmly in contact with the posterior wall. vomited or regurgitated matter will <RTI>therefore</RTI> preferentially pass in front of the mask and so enter the laryngeal inlet.

FRINIPLE (continued) The arrangement to be described in the present invention seeks to avoid the above situation by ensuring that the seal pressure of the mask against the laryngeal inlet remains unaffected by and is <RTI>independent</RTI> of changes in the surrounding structures as <RTI>may</RTI> occur during vomiting, retching or regurgitation.

EMBODIMENTS The principle outlined above may be achieved in a number of ways, for example: 1) The tube of the device can be made more flexible, for example by use of a flexo-metallic material.

2) The mask or mask support structure or an additional device placed behind the mask or mask support may be made of or contain a substance capable of being attracted by a magnetic or <RTI>electro-magnetic</RTI> force positioned outside the patient in front of the neck. <RTI>Application</RTI> <RTI>ol</RTI> electromagnetic or magnetic force would then attract the mask forward tightening its seal against the laryngeal inlet.

3) The mask cuff may be coated with a biologically <RTI>compatible</RTI> adhesive so that it <RTI>bees</RTI> lightly adherent to th laryngeal perimeter tissues.

<RTI>,}</RTI> The mask and its tube can be sprung forwards by the incorporation of a material such as spring <RTI>steel</RTI> for example which may be inserted through a specially constructed channel after insertion of the device, or may be made integral with the <RTI>device.</RTI> the outer end of such a spring curving round the <RTI>Patients</RTI> chin to terminate in an appropriately shaped cushion to provide counterpressure against the larynx, thus clamping the laryngeal mask to the laryngeal inlet. This <RTI>device</RTI> would thus constitute a larvngeal clamp.

<RTI>5)</RTI> The tube of the laryngeal mask could also. be <RTI>formed</RTI> as <RTI> a</RTI> <RTI>coiled</RTI> tube, which when in position would be partially uncoiled with resultant spring action transmitted to the mask against the laryngeal inlet. This <RTI>effect</RTI> could for example be <RTI>achieved</RTI> by incorporation of a cable lying in a small flexible tube fixed <RTI>longditudinally</RTI> to the <RTI>concave</RTI> surface of the laryngeal mask <RTI>tube's</RTI> normal <RTI>etrusion</RTI> curvature, the cable being securely fixed to the mask support structure at one end but emerging from its tube at the outer end of the mask's tube. Fulling the cable thus tightens the main tube <RTI>curvatur2,</RTI> urging the mask towards the larynx.

DESCRIPTION OF A SPECIFIC EMBODIMENT: A LARYNGEAL CLAMP TO <RTI>COMPRESR</RTI> THE LARYNGEAL MASK AGAINST THE <RTI>LARYNX,</RTI> USING A SPRING STEEL. MECHANISM With reference to the accompanying informal <RTI>drawing.</RTI> a laryngeal mask (1) is shown schematically in its normal position in the pharynx <RTI>(2).</RTI> A spring, the tension in which is <RTI>preferably</RTI> adjustable, is shown diagrammatically as a thick black line (3) which terminates external to the patient in a cushion (4) which rests against the front of DESORIPTION OF A SPECIFIC EMBODIMENT (continued) the neck while it inner end lies within the patient's throat ( (2) where it presses against the posterior surface of the mask (1), urging it against the laryngeal inlet (5). The rigid <RTI>framework</RTI> of the larynx, provided by the thyroid cartilage <RTI>(6),</RTI> permit the action of the spring <RTI>(3)</RTI> to clamp the mask against the larynx without distortion of the airway.

The spring (3) is in this embodiment pierced to form a slot longitudinally (not shown in the drawings so that the tube (7) of the laryngeal mask is not compressed by it against the tongue <RTI>(8).</RTI> <RTI>However</RTI> it should be understood that a spring mechanism to Produce the desired effect could pass in front of, behind or beside the tube or indeed lie within it or be incorporated in its wall.

Claims (4)

1) A laryngeal mask artificial airway device in which the pressure exerted by the mask portion against the laryngeal inlet is controlled by a clamp mechanism, the mask forming one jaw of a clamp the other jaw of which is formed by a suitably shaped cushion which presses against the front of the neck.
<RTI>
2 > </RTI> laryngeal mask device as in (1) above in which the force urging the two jaws of the clamp mechanism towards each other is magnetic or <RTI>electromagnetic.</RTI>
3) A laryngeal mask device as in <RTI>(1)</RTI> above in which the force urging the jaws of the clamp mechanism <RTI>together</RTI> is mechanical.
4) A <RTI>larynseal</RTI> mask device in which the tishtness of the seal of the mask against the laryngeal inlet is <RTI>indePendent</RTI> of the pressure of surrounding anatomical structures.
GB9025193A 1990-11-20 1990-11-20 A laryngeal clamp Withdrawn GB9025193D0 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9025193A GB9025193D0 (en) 1990-11-20 1990-11-20 A laryngeal clamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9025193A GB9025193D0 (en) 1990-11-20 1990-11-20 A laryngeal clamp

Publications (2)

Publication Number Publication Date
GB9025193D0 GB9025193D0 (en) 1991-01-02
GB2249959A true true GB2249959A (en) 1992-05-27

Family

ID=10685664

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9025193A Withdrawn GB9025193D0 (en) 1990-11-20 1990-11-20 A laryngeal clamp

Country Status (1)

Country Link
GB (1) GB9025193D0 (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2267034A (en) * 1992-05-21 1993-11-24 Archibald Ian Jeremy Brain Laryngeal airway clamp
DE4447186A1 (en) * 1994-12-30 1996-07-11 Johann Dr Med Wittenbeck Larynx mask for fibre optic endotracheal intubation with simultaneous artificial respiration
EP0834331A2 (en) 1996-10-03 1998-04-08 Smiths Industries Public Limited Company Laryngeal mask airways and their manufacture
EP0842672A2 (en) 1996-11-19 1998-05-20 Smiths Industries Public Limited Company Laryngeal mask airways
EP0845276A2 (en) 1996-11-02 1998-06-03 Smiths Industries Public Limited Company Laryngeal mask airways
US5983897A (en) * 1997-03-18 1999-11-16 Smiths Industries Public Limited Company Laryngeal mask assemblies
US6012452A (en) * 1997-10-16 2000-01-11 Smiths Industries Public Limited Company Laryngeal mask assemblies
US6050264A (en) * 1996-09-18 2000-04-18 Smiths Industries Public Limited Company Laryngeal mask assemblies
EP1125595A1 (en) 2000-02-08 2001-08-22 Smiths Group PLC Masks and their manufacture
GB2409163A (en) * 2003-12-18 2005-06-22 Smiths Group Plc A laryngeal mask having a tube partially reinforced by helical metal wire
EP1609498A1 (en) 1998-02-17 2005-12-28 Smiths Group plc Laryngeal mask airways and their manufacture
US7806119B2 (en) 2003-08-14 2010-10-05 Intersurgical Uab Airway device
US8215307B2 (en) 2002-08-14 2012-07-10 Intersurgical Uab Airway device
USD665254S1 (en) 2011-06-08 2012-08-14 Intersurgical Ag Airway device packaging
USD688787S1 (en) 2011-06-08 2013-08-27 Intersurgical Ag Airway device cap and strap holder
CN103736188A (en) * 2014-01-06 2014-04-23 郁万友 Ventilation sleeve element with percutaneous synchronous esophagus pressurizing function
USD712244S1 (en) 2011-09-23 2014-09-02 Intersurgical Ag Medical device package
US9265905B2 (en) 2010-06-24 2016-02-23 Ashkal Developments Limited Stopper device
USD761952S1 (en) 2012-07-27 2016-07-19 Docsinnovent Limited Airway device
US9592358B2 (en) 2008-06-04 2017-03-14 Intersurgical Ag Respiratory interface devices
US9937311B2 (en) 2012-01-27 2018-04-10 Ashkal Developments Limited Stopper device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2111394A (en) * 1981-12-16 1983-07-06 Archibald Ian Jeremy Brain Artificial airway device
GB2229367A (en) * 1989-03-22 1990-09-26 Archibald Ian Jeremy Brain Artificial airway device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2111394A (en) * 1981-12-16 1983-07-06 Archibald Ian Jeremy Brain Artificial airway device
GB2229367A (en) * 1989-03-22 1990-09-26 Archibald Ian Jeremy Brain Artificial airway device

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2267034A (en) * 1992-05-21 1993-11-24 Archibald Ian Jeremy Brain Laryngeal airway clamp
GB2267034B (en) * 1992-05-21 1996-11-13 Archibald Ian Jeremy Brain Laryngeal mask with external clamp
DE4447186A1 (en) * 1994-12-30 1996-07-11 Johann Dr Med Wittenbeck Larynx mask for fibre optic endotracheal intubation with simultaneous artificial respiration
US6050264A (en) * 1996-09-18 2000-04-18 Smiths Industries Public Limited Company Laryngeal mask assemblies
EP0834331A2 (en) 1996-10-03 1998-04-08 Smiths Industries Public Limited Company Laryngeal mask airways and their manufacture
EP0845276A2 (en) 1996-11-02 1998-06-03 Smiths Industries Public Limited Company Laryngeal mask airways
EP0842672A2 (en) 1996-11-19 1998-05-20 Smiths Industries Public Limited Company Laryngeal mask airways
US5983897A (en) * 1997-03-18 1999-11-16 Smiths Industries Public Limited Company Laryngeal mask assemblies
US6012452A (en) * 1997-10-16 2000-01-11 Smiths Industries Public Limited Company Laryngeal mask assemblies
EP1609498A1 (en) 1998-02-17 2005-12-28 Smiths Group plc Laryngeal mask airways and their manufacture
EP1125595A1 (en) 2000-02-08 2001-08-22 Smiths Group PLC Masks and their manufacture
US9475223B2 (en) 2002-08-14 2016-10-25 Muhammed Aslam Nasir Method of manufacturing an airway device
US8778248B2 (en) 2002-08-14 2014-07-15 Muhammed Aslam Nasir Method of manufacturing an airway device
US8215307B2 (en) 2002-08-14 2012-07-10 Intersurgical Uab Airway device
US9266268B2 (en) 2002-08-14 2016-02-23 Muhammed Aslam Nasir Method of manufacturing an airway device
US7806119B2 (en) 2003-08-14 2010-10-05 Intersurgical Uab Airway device
US8485188B2 (en) 2003-08-14 2013-07-16 Muhammed Aslam Nasir Airway device
GB2409163B (en) * 2003-12-18 2008-02-06 Smiths Group Plc Laryngeal mask assemblies
GB2409163A (en) * 2003-12-18 2005-06-22 Smiths Group Plc A laryngeal mask having a tube partially reinforced by helical metal wire
US9592358B2 (en) 2008-06-04 2017-03-14 Intersurgical Ag Respiratory interface devices
US9265905B2 (en) 2010-06-24 2016-02-23 Ashkal Developments Limited Stopper device
USD688787S1 (en) 2011-06-08 2013-08-27 Intersurgical Ag Airway device cap and strap holder
USD665254S1 (en) 2011-06-08 2012-08-14 Intersurgical Ag Airway device packaging
USD712244S1 (en) 2011-09-23 2014-09-02 Intersurgical Ag Medical device package
US9937311B2 (en) 2012-01-27 2018-04-10 Ashkal Developments Limited Stopper device
USD768846S1 (en) 2012-01-27 2016-10-11 Ashkal Developments Limited Airway device
USD769442S1 (en) 2012-01-27 2016-10-18 Ashkal Developments Limited Airway device
USD761952S1 (en) 2012-07-27 2016-07-19 Docsinnovent Limited Airway device
CN103736188B (en) * 2014-01-06 2016-11-16 郁万友 Percutaneous sync transesophageal pressurized ventilation kit
CN103736188A (en) * 2014-01-06 2014-04-23 郁万友 Ventilation sleeve element with percutaneous synchronous esophagus pressurizing function

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Publication number Publication date Type
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Legal Events

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)