CN113332552A

CN113332552A - High leakproofness laryngeal mask

Info

Publication number: CN113332552A
Application number: CN202110674132.2A
Authority: CN
Inventors: 伍金红; 李文献; 贾继娥; 李卫星
Original assignee: Eye and ENT Hospital of Fudan University
Current assignee: Eye and ENT Hospital of Fudan University
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-09-03

Abstract

The invention provides a high-sealing laryngeal mask, which comprises a laryngeal mask body and a vent pipe, wherein a narrowing end used for blocking an esophagus is arranged on the laryngeal mask body, a vent cavity is formed on the laryngeal mask body, one side of the vent cavity is in an open arrangement, and the side walls on the peripheral side of the vent cavity are inwards in a contraction arrangement from one side of the side walls, which deviates from the vent cavity open opening, to one side of the side walls, which is close to the vent cavity open opening; the laryngeal mask body on the periphery of the opening of the ventilation cavity is provided with a flexible sealing sheet which extends towards the middle part of the ventilation cavity from bottom to top. Through laryngeal mask body, ventilate chamber and flexible sealing piece, when the breather pipe aerifys to the intracavity of ventilating, the lateral wall in the chamber of ventilating outwards expands under the effect of the intracavity air pressure of ventilating to make the lateral wall of laryngeal mask body and the laminating of the oral cavity mucosa of flexible sealing piece and patient glottis department, help increasing the laminating area of the oral cavity mucosa of laryngeal mask body and patient glottis department, thereby help increasing the compactness of the laminating of the oral cavity mucosa of laryngeal mask body and patient glottis department.

Description

High leakproofness laryngeal mask

Technical Field

The invention relates to the technical field of medical appliances, in particular to a laryngeal mask with high sealing property.

Background

When general anesthesia operation is performed, auxiliary respiration is needed to be performed on an operation patient so as to keep the general anesthesia hemodynamics of the patient stable, and common auxiliary respiratory ventilation devices comprise a tracheal tube ventilation device and a laryngeal mask respiratory ventilation device. The laryngeal mask belongs to a supraglottic ventilation device, and is an effective means for establishing a safe airway in general anesthesia operation.

Currently, the laryngeal masks currently on the market have the following drawbacks: firstly, the sealing pressure is not high, the nostril is under-ventilated or hypoxemia after the gas is easy to leak out, and the gas leaks into the esophagus and the stomach to cause reflux and aspiration frequently, which causes serious clinical complications; secondly, patients have a high incidence of post-operative angina.

The prior Chinese patent with publication number CN209033439U discloses an inflation-free sealing laryngeal mask, which comprises a mask body capable of covering oral mucosa around a glottis and a mask body pipe which is in adaptive connection with the mask body; the cover body comprises a cover body bottom plate and a cover main body arranged on the cover body bottom plate, and a cover body cavity which can be communicated with the cover body pipe is arranged in the center area in the cover main body; at least one circle of sealing film is arranged at the upper part of the cover main body, and the sealing film is distributed around the outer ring of the cover main body and/or the inner ring in the cover body cavity; when the cover main body is covered on the glottis, the joint portion between the cover main body and the glottis can be sealed by the seal film.

The inventor believes that the laryngeal mask of the prior art does not fit tightly to the oral mucosa around the patient's glottis when in use, resulting in poor sealing, and there is a need for improvement.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a laryngeal mask with high sealing performance.

The high-sealing laryngeal mask comprises a laryngeal mask body and a vent pipe, wherein a narrowing end used for blocking an esophagus is arranged on the laryngeal mask body, a vent cavity is formed on the laryngeal mask body, one side of the vent cavity is opened, the vent cavity is communicated with the vent pipe, and the side walls on the peripheral side of the vent cavity are inwards shrunk from one side of the peripheral side of the vent cavity, which is far away from the open opening of the vent cavity, to the side close to the open opening of the vent cavity; the laryngeal mask body on the periphery of the opening of the ventilation cavity is provided with a flexible sealing sheet, and the flexible sealing sheet extends towards the middle of the ventilation cavity from bottom to top.

Preferably, the outer wall of the narrowing end is arc-shaped, a first cavity is formed in the narrowing end, and the first cavity is communicated with the ventilation cavity.

Preferably, the vent tube is disposed on a side of the side wall of the vent chamber remote from the narrowed end.

Preferably, a second cavity is formed at the joint of the vent pipe and the side wall of the vent cavity, and the second cavity is communicated with the vent cavity.

Preferably, the thickness of the side wall of the ventilation cavity is gradually reduced from bottom to top.

Preferably, the outer contour of the laryngeal mask body is arc-shaped, a bulge part is formed on the laryngeal mask body at the opening of the ventilation cavity, and the bulge part is connected with the two ends of the laryngeal mask body in the length direction through arc surfaces.

Preferably, the distance between the hump and the outer edge of the narrowed end is one half to two thirds of the length of the laryngeal mask body.

Preferably, the laryngeal mask body comprises a back plate and a sealing air bag, the sealing air bag is fixedly arranged on the back plate, the opening of the ventilation cavity is located on one side, away from the back plate, of the ventilation cavity, and the sealing air bag is communicated with an air bag pressure indicating device.

Preferably, the balloon pressure indicating device comprises a conduit, an indicating balloon and a check valve, the indicating balloon is communicated with the sealing balloon through the conduit, the indicating balloon is provided with an air inlet, and the check valve is installed at the air inlet of the indicating balloon.

Preferably, the laryngeal mask body comprises a back plate and a silica gel wall, the silica gel wall is tightly arranged on the back plate, and the opening of the ventilation cavity is located on one side of the ventilation cavity, which is far away from the back plate.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the laryngeal mask, the laryngeal mask body, the ventilation cavity with the circumferential side wall contracting inwards and the flexible sealing sheet, when the ventilation pipe inflates air into the ventilation cavity, the circumferential side wall of the ventilation cavity expands outwards under the action of air pressure in the ventilation cavity, so that the outer side wall of the laryngeal mask body and the flexible sealing sheet are attached to the oral mucosa at the glottis of a patient, the attachment area of the laryngeal mask body and the oral mucosa at the glottis of the patient is increased, and the attachment tightness of the laryngeal mask body and the oral mucosa at the glottis of the patient is increased;

2. according to the invention, the flexible sealing sheet is arranged on the side wall of the opening of the ventilation cavity, and the flexible sealing sheet is supported by the side wall of the ventilation cavity, so that wrinkles generated by the circulation increase or decrease of air pressure in the ventilation cavity of the flexible sealing sheet are reduced, and the tightness of the fit between the laryngeal mask body and the oral mucosa at the glottis of a patient is improved;

3. according to the invention, the esophagus opening of the patient is blocked by the narrowing end, when the vent pipe is inflated into the vent cavity, the side wall of the narrowing end expands outwards under the action of the gas in the first cavity, so that the outer wall of the narrowing end is attached to the inner wall mucosa of the esophagus opening of the patient, and the reliability of blocking the esophagus of the patient by the narrowing end is improved, thereby being beneficial to reducing the occurrence of reflux and aspiration caused by the gas leaking into the esophagus and the stomach, and further being beneficial to reducing the occurrence of clinical complications;

4. the ventilation pipe is arranged on the side wall on the peripheral side of the ventilation cavity, so that the compression of the ventilation pipe on the throat part of a patient during the work of the laryngeal mask is reduced, and the incidence rate of the pharyngeal pain of the patient after the operation is reduced.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic cross-sectional view of a laryngeal mask body embodying the present invention;

figure 2 is a schematic rear view of the overall structure of a laryngeal mask embodying the invention;

figure 3 is a schematic view of the overall structure of a laryngeal mask embodying the invention;

fig. 4 is a schematic view of the overall structure of a laryngeal mask in accordance with a variation 1 of the present invention.

Shown in the figure:

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

As shown in fig. 1 and 2, the high-sealing laryngeal mask provided by the invention comprises a laryngeal mask body 1 and a ventilation pipe 2, wherein the laryngeal mask body 1 has certain ductility, a ventilation cavity 11 is formed on the laryngeal mask body 1, and the side walls of the peripheral side of the ventilation cavity 11 are all inwards shrunk from the side of the peripheral side of the ventilation cavity 11, which is far away from the opening of the ventilation cavity 11, to the side of the peripheral side of the ventilation cavity, which is close to the opening of the ventilation cavity 11. The laryngeal mask body 1 on the opening periphery side of the ventilation cavity 11 is integrally formed with a flexible sealing sheet 3, and the flexible sealing sheet 3 extends towards the middle of the ventilation cavity 11 from bottom to top.

As shown in fig. 3, a narrowing end 4 is integrally formed at one end of the laryngeal mask body 1, the outer walls of the narrowing end 4 are arc-shaped, a first cavity 41 is formed in the narrowing end 4, and the first cavity 41 is communicated with the ventilation cavity 11. When laryngeal mask body 1 is in operating position, the narrowing end 4 is located patient's esophagus mouth department, when ventilating cavity 11 in fill gas, because first cavity 41 and the chamber 11 intercommunication of ventilating, the outer wall of narrowing end 4 outwards expands under the effect of the inside atmospheric pressure of first cavity 41, thereby make the outer wall of narrowing end 4 and the laminating of the lateral wall mucosa of patient's food and oral cavity, and then with the help of narrowing end 4 with the esophagus shutoff of patient, it causes palirrhea mistake absorbing's the condition to take place to have reduced gas leakage esophagus and stomach, and then reduced the emergence of clinical complication.

As shown in fig. 3, the external contour of the laryngeal mask body 1 is arc-shaped, a bulge part 5 is formed on the upper side of the middle part of the laryngeal mask body 1 at the opening of the ventilation cavity 11, the bulge part 5 is connected with the two ends of the laryngeal mask body 1 in the length direction through arc surfaces, and the distance between the bulge part 5 and the outer edge of the narrowing end 4 is one half to two thirds of the length of the laryngeal mask body 1, preferably two thirds of the length of the laryngeal mask body 1. According to the shape characteristic of the pharyngeal structure of the human body, the bulge part 5 arranged at the half to two thirds of the length of the laryngeal mask body 1 improves the attaching area of the outer wall of the laryngeal mask body 1 and the inner wall of the pharyngeal portion of the patient, helps to reduce the attaching gap between the laryngeal mask body 1 and the inner wall of the pharyngeal portion of the patient, and improves the tightness of the sealing of the glottis combining part of the laryngeal mask body 1 and the patient.

As shown in fig. 3, the ventilation tube 2 is a flexible plastic tube, the joint of the ventilation tube 2 and the laryngeal mask body 1 is located on the side wall of the laryngeal mask body 1 far away from the narrowing end 4, a second cavity 12 is formed at the joint of the ventilation tube 2 and the side wall of the ventilation cavity 11, and the second cavity 12 is communicated with the ventilation cavity 11. When the breather pipe 2 aerifys the breather chamber 11, the lateral wall of second cavity 12 outwards expands under the effect of the atmospheric pressure in the second cavity 12, has improved the laminating area of oral mucosa around laryngeal mask body 1 and the patient glottis, and through installing breather pipe 2 on the lateral wall of laryngeal mask body 1, has reduced the oppression to patient's pharynx when the laryngeal mask work, can effectually reduce the incidence of patient's pharyngalgia after the operation.

The thickness of the side wall of the ventilation cavity 11 is gradually reduced from bottom to top, and when the ventilation cavity 11 is inflated, the side wall of the upper part of the ventilation cavity 11 has larger deformation relative to the side wall of the lower part of the ventilation cavity 11, so that the lower side wall of the ventilation cavity 11 has certain stability, and the side wall of the upper part of the ventilation cavity 11 has enough deformation. The side walls on both sides in the width direction of the vent chamber 11 are slightly inclined toward the middle of the vent chamber 11. In operation, the breather pipe 2 is aerifyd in to the chamber of ventilating 11, and the lateral wall of the chamber of ventilating 11 opens under the effect of atmospheric pressure, and then makes the lateral wall of the chamber of ventilating 11 and the laminating of the oral mucosa around the patient's glottis, has improved the sealed compactness of laryngeal mask body 1 and patient's glottis joint part.

Furthermore, the edge track of the flexible sealing sheet 3 is approximately parallel to the edge track of the opening of the ventilation cavity 11, the flexible sealing sheet 3 is a thin silicon sheet, and under the action of air pressure in the ventilation cavity 11, the flexible sealing sheet 3 expands upwards, so that the attaching area of the glottis joint part of the laryngeal mask body 1 and the patient is increased, and the sealing effect is improved. And the side wall of the ventilation cavity 11 plays a supporting role for the flexible sealing sheet 3, so that wrinkles generated in the process of circularly increasing or reducing the air pressure in the ventilation cavity 11 by the flexible sealing sheet 3 are reduced, and the tightness of the sealing of the glottis joint of the laryngeal mask body 1 and the patient is further ensured.

As shown in fig. 3, the laryngeal mask body 1 comprises a back plate 6 and a sealing air bag 7, wherein the back plate 6 is a one-piece silica gel flat plate and has certain ductility, the sealing air bag 7 is fixedly mounted on one side of the back plate 6 through glue, and when the ventilation tube 2 inflates the ventilation cavity 11, the sealing air bag 7 expands outwards under the action of air pressure in the ventilation cavity 11. On the one hand, the sealing air bag 7 serves as the side wall of the ventilation cavity 11, provides an installation foundation for the flexible sealing sheet 3 and plays a supporting role, and on the other hand, the sealing air bag 7 is inflated and expanded to increase the attaching area of the laryngeal mask and oral mucosa around the glottis of a patient, so that the tightness of the sealing of the laryngeal mask and the glottis joint part is improved.

The balloon pressure indicating device 8 is communicated with the sealed balloon 7, the balloon pressure indicating device 8 comprises a conduit 81, an indicating balloon 82 and a check valve 83, the indicating balloon 82 is communicated with the sealed balloon 7 through the conduit 81, and the conduit 81 is installed on the side wall of the breather pipe 2. An air inlet is integrally formed in the indicating air bag 82, and a check valve 83 is installed at the air inlet of the indicating air bag 82. By inflating the airbag 7 with the indicator bag 82 and detecting the air pressure of the airbag 7, the occurrence of the gas in the indicator bag 82 and the airbag 7 flowing out from the inlet of the indicator bag 82 is reduced by the check valve 83 attached to the inlet of the indicator bag 82.

Modification example 1

As shown in fig. 4, the laryngeal mask body 1 includes a back plate 6 and a silicone wall 9, the back plate 6 is a one-piece silicone flat plate and has a certain ductility, the silicone wall 9 is fixedly mounted on one side of the back plate 6 through glue or integrated molding, and when the ventilation tube 2 inflates air into the ventilation cavity 11, the silicone wall 9 expands outwards under the action of the air pressure in the ventilation cavity 11. Silica gel wall 9 is as the lateral wall of chamber 11 of ventilating on the one hand, provides the installation basis and plays the supporting role for flexible sealing piece 3, and on the other hand, silica gel wall 9 outwards expands under the effect of chamber 11 internal gas pressure of ventilating and has increased the laminating area of laryngeal mask and the oral mucosa around the patient's glottis, has improved the sealed compactness of laryngeal mask and patient's glottis joint portion.

Principle of operation

In operation, a worker puts the laryngeal mask into the throat part of a patient from the oral cavity of the patient, and the open mouth of the ventilation cavity 11 is opposite to the glottis of the patient, and the narrow end 4 is positioned at the esophagus inlet of the patient; then, a worker fills gas into the ventilation cavity 11 through the ventilation pipe 2, the air pressure in the ventilation cavity 11 is increased, the side wall of the ventilation cavity 11 and the flexible sealing sheet 3 are both expanded outwards and attached to the oral mucosa at the glottis of a patient, and the sealing tightness of the combination part of the laryngeal mask body 1 and the glottis of the patient is improved; and the narrowing end 4 expands under the action of the air pressure in the first cavity 41 and seals off the esophagus of the patient, so that the occurrence of reflux and aspiration caused by air leakage into the esophagus and the stomach is reduced, and further the occurrence of clinical complications is reduced.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. The high-sealing laryngeal mask is characterized by comprising a laryngeal mask body (1) and a vent pipe (2), wherein a narrowing end (4) used for blocking an esophagus is arranged on the laryngeal mask body (1), a vent cavity (11) is formed on the laryngeal mask body (1), one side of the vent cavity (11) is open and arranged, the vent cavity (11) is communicated with the vent pipe (2), and the side walls of the peripheral sides of the vent cavity (11) are inwards shrunk and arranged from one side of the peripheral sides of the vent cavity (11), which deviates from the open side of the vent cavity (11), to the side of the peripheral sides, which is close to the open side of the vent cavity (11);

the laryngeal mask body (1) on the periphery of the opening of the ventilation cavity (11) is provided with a flexible sealing sheet (3), and the flexible sealing sheet (3) extends from bottom to top towards the middle of the ventilation cavity (11).

2. A high leak tightness laryngeal mask according to claim 1, characterised in that the outer walls of the narrowing end (4) are curved, that a first cavity (41) is formed in the narrowing end (4), that said first cavity (41) communicates with the ventilation lumen (11).

3. A high leak tightness laryngeal mask according to claim 1, characterised in that the ventilation tube (2) is arranged on the side of the side wall of the ventilation chamber (11) remote from the narrowed end (4).

4. A high leak-tightness laryngeal mask according to claim 1, characterised in that the joint between the ventilation tube (2) and the side wall of the ventilation chamber (11) forms a second cavity (12), and that the second cavity (12) communicates with the ventilation chamber (11).

5. A high leak tightness laryngeal mask according to claim 1, characterised in that the thickness of the side walls of the ventilation cavity (11) decreases from bottom to top.

6. The high-sealing laryngeal mask according to claim 1, characterised in that the external profile of the laryngeal mask body (1) is arc-shaped, a bulge (5) is formed on the laryngeal mask body (1) at the opening of the ventilation cavity (11), and the bulge (5) is connected with both ends of the laryngeal mask body (1) in the length direction through arc surfaces.

7. A laryngeal mask according to claim 6, characterised in that the distance of the ridge (5) from the outer edge of the narrowing (4) is between one half and two thirds of the length of the mask body (1).

8. The laryngeal mask according to claim 1, characterised in that the laryngeal mask body (1) comprises a back plate (6) and a sealing air bag (7), the sealing air bag (7) is arranged on the back plate (6) in a fastened mode, the opening of the ventilation cavity (11) is located on the side, facing away from the back plate (6), of the ventilation cavity (11), and the sealing air bag (7) is communicated with an air bag pressure indicating device (8).

9. The laryngeal mask according to claim 8, characterised in that the balloon pressure indication means (8) comprises a catheter (81), an indication balloon (82) and a non-return valve (83), the indication balloon (82) is in communication with the sealing balloon (7) through the catheter (81), the indication balloon (82) is provided with an air inlet, and the non-return valve (83) is mounted at the air inlet of the indication balloon (82).

10. A laryngeal mask according to claim 1, characterised in that the laryngeal mask body (1) comprises a back plate (6) and a silicone wall (9), the silicone wall (9) being arranged fast to the back plate (6), the opening of the ventilation lumen (11) being located on the side of the ventilation lumen (11) facing away from the back plate (6).