# US 8,783,256 B2 · Laryngeal mask airway device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,783,256 B2
- Document ID: US8783256B2
- Status: Granted
- Kind: B2
- Application number: 13/397,468
- Filed: 2012-02-15
- Published: 2012-06-14
- Granted: 2014-07-22
- Earliest claimed: 2005-05-27
- Assignees: The Laryngeal Mask Company Limited
- Applicants: Archibald I. J. Brain
- Inventors: Archibald I. J. Brain
- Web page: https://patentgrep.com/patent/US8783256B2

## CPC

- A61M 16/045: {with cuffs partially or completely inflated by the respiratory gas}
- A61M 16/04: Tracheal tubes (catheters in general A61M25/00)
- A61M 16/0409: {with mean for closing the oesophagus}
- A61M 16/0415: {with access means to the stomach}
- A61M 16/0443: {Special cuff-wall materials (A61M16/0481, A61M16/0422 take precedence)}
- A61M 16/0447: {Bell, canopy or umbrella shaped}
- A61M 16/0463: {combined with suction tubes, catheters or the like; Outside connections}
- A61M 16/0816: {Joints or connectors}
- A61M 16/0875: {Connecting tubes}
- A61M 16/0493: {with means for protecting the tube from damage caused by the patient's teeth, e.g. bite block}
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

The invention relates to a laryngeal mask airway device (1) for insertion into patient to provide an airway passage to the patient's glottic opening, the device (1) including an airway tube (2), a mask (3) attached to the airway tube (2), the mask (3) including a body (4) having a distal end (5) and a proximal end (6), a peripheral inflatable cuff (7), and an outlet (8), the mask (3) being attached to the airway tube (2) for gaseous communication between the tube (2) and the outlet (8), the device (1) further including a structure to prevent occlusion of the outlet (8) by the patient's anatomy, the structure including a support (11), and a conduit (28a) to allow gas to flow out of the outlet (8), past the support.

## Claims

### Claim 1

A laryngeal mask airway device for insertion into a patient to provide an airway passage to the patient's glottic opening, the device comprising an airway tube, a mask attached to the airway tube, the mask comprising a backplate having a distal end and a proximal end and dorsal and ventral sides, a peripheral inflatable cuff, and defining an outlet for gas, the mask being connected to the airway tube for gaseous communication between the tube and the mask, the device further comprising means to prevent occlusion of the outlet by the patient's anatomy, the means comprising a support, the support defining a support surface, and a plurality of conduits to allow gas to flow out of the outlet past the support, each of the plurality of conduits defined by sides walls that include laterally extending webs to partially close over each of the plurality of conduits; wherein the outlet includes a floor, the support being disposed to support an occluding anatomical structure above the level of the floor, to allow gas to flow therebelow; wherein the support surface is provided upon a substantially centrally disposed, longitudinal upstand, extending from in front of the outlet towards the distal end, which raises the support surface above the level of the ventral side; the support being an outer surface of an oesophageal drain tube, the drain tube being formed integrally in the material of the backplate.

### Claim 2 (depends on 1)

A device according to claim 1, the support surface being disposed on the ventral side, in front of the outlet in the path of gas flow.

### Claim 3 (depends on 1)

A device according to claim 1, wherein the support surface is integrally formed in the material of the backplate.

### Claim 4 (depends on 1)

A device according to claim 1, each of the plurality of conduits including a floor, the floor being defined by a part of the ventral side of the backplate.

### Claim 5 (depends on 1)

A device according to claim 1, each of the plurality of conduits being defined by side walls, at least one side wall being defined by a part of the support.

### Claim 6 (depends on 1)

A device according to claim 1, each of the plurality of conduits having a substantially circular cross-section.

### Claim 7 (depends on 1)

A device according to claim 1, the webs including upper surfaces disposed at the same level as the support, to prevent entry of an occluding structure into each of the plurality of conduits.

### Claim 8 (depends on 1)

A device according to claim 1, the plurality of conduits being two conduits, the conduits being disposed either side of the support.

### Claim 9 (depends on 1)

A device according to claim 1, the drain tube extending substantially centrally along the ventral side of the backplate, from the outlet to a distal tip.