Laryngeal mask

Patent metadata

Field	Value
Publication number	US-2016101254-A1
Application number	US-201514973859-A
Country	US
Kind code	A1
Filing date	Dec 18, 2015
Priority date	Jun 20, 2013
Publication date	Apr 14, 2016
Grant date	—

Abstract

A laryngeal mask for use in a patient comprises an airway tube having an inner lumen and a distal end; and a mask portion connected at a proximal end thereof to the distal end of the airway tube and having a distal tip opposite the proximal end. The mask portion comprises an inflatable cuff including an anterior cuff surface configured to contact the patient's tissue when the inflatable cuff is inflated; and a wedge portion including a stabilization surface and two walls connected to the inflatable cuff and extending therefrom toward from the stabilization surface, the stabilization surface extending from the distal tip of the mask portion toward the distal end of the airway tube at a wedge angle of between about 12 and 30 degrees, the wedge angle formed between the stabilization surface and the anterior cuff surface when the inflatable mask is inflated, whereby the stabilization surface is transversely and longitudinally substantially flat to stabilize the laryngeal mask in use. The laryngeal mask has a gastric tube with a varying inner tube diameter.

First claim

What is claimed is:

1 . A laryngeal mask for use in a patient, the laryngeal mask comprising:
an airway tube having an inner lumen, an outer surface, a proximal end, a distal end, and a curved section between the proximal end and the distal end; a gastric tube which extends along the outer surface of the airway tube, the gastric tube has a first inner diameter along at least a portion of the curved section of the airway tube, which first inner diameter is larger than a second inner diameter of the gastric tube distal to the curved section of the airway tube; and a mask portion connected at a proximal end thereof to the distal end of the airway tube and having a distal tip opposite the proximal end, the mask portion comprising:
an inflatable cuff including an anterior cuff surface configured to contact the patient's tissue when the inflatable cuff is inflated; and
a wedge portion including a stabilization surface and two walls connected to the inflatable cuff and extending therefrom toward from the stabilization surface, the stabilization surface extending from the distal tip of the mask portion toward the distal end of the airway tube at a wedge angle of between about 12 and 30 degrees, the wedge angle formed between the stabilization surface and the anterior cuff surface when the inflatable mask is inflated, whereby the stabilization surface is transversely and longitudinally substantially flat to stabilize the laryngeal mask in use.

2 . A laryngeal mask as in claim 1 , wherein the wedge angle is between about 15 and 25 degrees.

3 . A laryngeal mask as in claim 2 , wherein the wedge angle is between about 17.5 and 22.5 degrees.

4 . A laryngeal mask as in claim 3 , wherein the wedge angle is about 20.0 degrees.

5 . A laryngeal mask as in claim 1 , wherein the stabilizing surface has a maximum width aspect ratio of between about 22% to 35%, the maximum width aspect ratio being the ratio, expressed as a percentage, of the maximum width w 1 to the length l of the stabilizing surface.

6 . A laryngeal mask as in claim 5 , wherein the maximum width aspect ratio is between about 25% to 32%.

7 . A laryngeal mask as in claim 6 , wherein the maximum width aspect ratio is between about 25% to 32% and the wedge angle is between about 17.5 and 22.5 degrees.

8 . A laryngeal mask as in claim 5 , wherein the maximum width aspect ratio is about 28.5%.

9 . A laryngeal mask as in claim 1 , wherein the stabilizing surface has a minimum width aspect ratio of between about 5% and 15%, the minimum width aspect ratio being the ratio, expressed as a percentage, of the minimum width w 2 to the length l of the stabilizing surface.

10 . A laryngeal mask as in claim 9 , wherein the minimum width aspect ratio is between about 8% to 12%.

11 . A laryngeal mask as in claim 10 , wherein the minimum width aspect ratio is about 10%.

12 . A laryngeal mask as in claim 9 , wherein the stabilizing surface has a maximum width aspect ratio of between about 22% to 35%, the maximum width aspect ratio being the ratio, expressed as a percentage, of the maximum width w 1 to the length l of the stabilizing surface, the minimum width aspect ratio is between about 8% to 12%, and the wedge angle is between about 17.5 and 22.5 degrees.

13 . A laryngeal mask as in claim 1 , further comprising a recess on one side of the mask portion and a gastric tube received in the recess, the inflatable cuff having an inner volume and comprising a proximal aperture, the gastric tube penetrating through the proximal aperture and the inner volume.

14 . A laryngeal mask for use in a patient, the laryngeal mask comprising:
an airway tube having an inner lumen, an outer surface, a proximal end, a distal end, and a curved section between the proximal end and the distal end; a gastric tube which extends along the outer surface of the airway tube, the gastric tube has a first inner diameter along at least a portion the curved section of the airway tube, which first inner diameter is larger than a second inner diameter of the gastric tube distal to the curved section of the airway tube; and a mask portion connected at a proximal end thereof to the distal end of the airway tube and having a distal tip opposite the proximal end, the mask portion comprising:
an inflatable cuff including an anterior cuff surface configured to contact the patient's tissue when the inflatable cuff is inflated; and
a stabilization surface extending from the distal tip of the mask portion toward the distal end of the airway tube, whereby the stabilization surface is transversely and longitudinally substantially flat to stabilize the laryngeal mask in use, wherein the airway tube and the stabilization surface is configured so that an angle between 80-100 degrees is formed between a left-right plane extending longitudinally along the stabilization surface and a longitudinal axis at the proximal end of the airway tube.

15 . A laryngeal mask for use in a patient, the laryngeal mask comprising:
an airway tube having an inner lumen, an outer surface, a proximal end, a distal end, and a curved section between the proximal end and the distal end; a gastric tube which extends along the outer surface of the airway tube, the gastric tube has a first inner diameter along at least a portion the curved section of the airway tube, which first inner diameter is larger than a second inner diameter of the gastric tube distal to the curved section of the airway tube; and a mask portion connected at a proximal end thereof to the distal end of the airway tube and having a distal tip opposite the proximal end, the mask portion comprising:
an inflatable cuff including an anterior cuff surface configured to contact the patient's tissue when the inflatable cuff is inflated; and
a wedge portion including a stabilization surface and two walls connected to the inflatable cuff and extending therefrom toward from the stabilization surface, the stabilization surface extending from the distal tip of the mask portion toward the distal end of the airway tube at a wedge angle of between about 12 and 30 degrees, the wedge angle formed between the stabilization surface and the anterior cuff surface when the inflatable mask is inflated, whereby the stabilization surface is transversely and longitudinally substantially flat to stabilize the laryngeal mask in use,
wherein the airway tube and the stabilization surface is configured so that an angle between 80-100 degrees is formed between a left-right plane extending longitudinally along the stabilization surface and a longitudinal axis at the proximal end of the airway tube.

Assignees

• Ambu As

Inventors

• Hansen Jan Guldberg
• Qvist Troels Nicolaj
• Hoffmann Peer
• Helmsen Erik Øllgaard
• Petersen Lasse Kjeld Gjøske

Classifications

• A61M16/0447 Primary

  Bell, canopy or umbrella shaped · CPC title

• A61M16/0497

  Tube stabilizer · CPC title

• A61M16/0409 Primary

  with mean for closing the oesophagus · CPC title

• A61M16/0445

  Special cuff forms, e.g. undulated · CPC title

• A61M16/0415

  with access means to the stomach · CPC title