CN107137807B

CN107137807B - Laryngeal mask

Info

Publication number: CN107137807B
Application number: CN201710301540.7A
Authority: CN
Inventors: 刘振茂; 曹赞
Original assignee: Zhejiang Jenston Medical Technology Co ltd
Current assignee: Zhejiang Jenston Medical Technology Co ltd
Priority date: 2017-05-02
Filing date: 2017-05-02
Publication date: 2020-06-09
Anticipated expiration: 2037-05-02
Also published as: CN107137807A

Abstract

The laryngeal mask comprises a mask bag, a connecting piece and an airway tube, wherein the connecting piece is arranged in the mask bag, the front end of the airway tube penetrates into the mask bag and is connected with the connecting piece in a communicating mode, the rear end of the mask bag is connected with the outer surface of the airway tube in a sealing mode, two independent channels are arranged in the airway tube, a first airway is formed by the first channel and a first airway channel on the connecting piece in a communicating mode, a second airway is formed by the second channel and a second airway channel on the connecting piece in a communicating mode, and a convex stopping portion is arranged on the outer surface of the mask bag. The invention increases the resistance of the backward movement by arranging the stopping part and prevents the laryngeal mask from being extruded outwards to cause displacement.

Description

Laryngeal mask

Technical Field

The invention belongs to the field of medical instruments, and relates to a laryngeal mask.

Background

Disposable medical laryngeal mask products are primarily used to open and seal the upper larynx and provide a gas passageway in the patient's body during spontaneous, assisted or controlled ventilation. When in use, the laryngeal mask is inserted into the throat part, and the air bag is inflated to play a role in sealing and fixing. The disposable medical laryngeal mask can provide a passage for spontaneous respiration of a patient and can perform positive pressure ventilation.

Since the advent of laryngeal masks, the need to maintain a patient's airway and ensure the safety of the patient's airway has created opportunities for a number of different supraglottic airway tools. Although in most cases ventilation is ensured, they have problems of poor sealing, in-situ rotation, and displacement.

In practical clinical use, the laryngeal mask is displaced to cause poor air flue tightness and decline of vital signs (mainly blood oxygen saturation), and continuous positive pressure ventilation can fill gas into an esophagus to cause abdominal distension, backflow of gastric juice, aspiration and the like. At this point, the position of the laryngeal mask must be adjusted. In some operations, in order to prevent the movement of the laryngeal mask, excessive gas may be filled into the mask bladder, which may cause pressure damage to the tissues around the larynx due to too high pressure or uneven distribution in the bladder, and may lead to poor sealing due to deformation of the mask bladder after being filled with excessive gas.

The structure of the throat part is similar to a cone, the laryngeal mask is placed in the throat part and is contacted with the inner wall of the throat, and the laryngeal mask can be squeezed outwards after a human body is stimulated by a rejection reaction. The reason for this laryngeal mask displacement is as follows:

1. the structural design of the laryngeal mask is unreasonable and is not attached to the physiological structure of the laryngeal part of the pharynx.

2. The laryngeal mask is incorrectly selected and is not matched with the physiological structure;

3. in the induction and maintenance stage, when the depth of anesthesia is too shallow, the laryngeal mask is placed, and swallow reflex occurs or laryngeal spasm occurs;

4. the anesthesia is not stable in the operation and restlessness;

5. the posture changes during the operation, especially the head and the neck;

6. special body position manipulation (e.g., prone, lateral position);

7. surgery in which special surgery (laparoscopic surgery) results in increased intra-gastric pressure, or increased airway resistance;

8. the patient is moved post-operatively (to the resuscitation room), or the patient has recovered reflexes in an incompletely awakened state, and the patient restlesss.

The laryngeal mask in the existing market is divided into an inflatable laryngeal mask and an inflation-free laryngeal mask according to the structure. The shape and the size of the mask sac of the inflation-free laryngeal mask are fixed, and the problem of specification matching is prominent in clinical selection (due to the fact that individual anatomical structures have large differences, a single specification covers a large range of people, and therefore the mask sac cannot be completely matched. Firstly, the laryngeal mask is not easy to be inserted in place at one time, and the position needs to be adjusted repeatedly; secondly, displacement is easy to occur during operation, so that air leakage is caused, especially when secretion is more; once displaced, it is not easy to place again; some laryngeal masks have better fixity and are limited by physical structures at the front end and the rear end, but the cyprocotenoid joint can be easily dislocated due to the hardness and the size adaptation problem. The shape of the inflatable laryngeal mask is deformable, and the inflatable laryngeal mask can cover a large range of people through specification matching in clinical selection; the inflatable laryngeal mask deforms under stress, has no physical structure convenient to fix, is easy to rotate and shift, and is easy to shift particularly when secretions exist; the front end of the inflatable laryngeal mask capsule expands during inflation, and excessive pressure can cause the cyprocotenoid joint to be extruded and also can cause dislocation; the inflatable laryngeal mask is expected to achieve better tightness, and the pressure in the sac is higher, so that compression injury is caused.

Disclosure of Invention

The laryngeal mask provided by the invention has good sealing performance, is not easy to shift and can not be folded.

The technical scheme adopted by the invention is as follows:

laryngeal mask, including cover bag, connecting piece, air flue pipe, the connecting piece sets up in the cover bag, the front end of air flue pipe penetrates in the cover bag and is connected with the connecting piece intercommunication, the rear end of cover bag and the surface sealing connection of air flue pipe, be provided with two independent passageways in the air flue pipe, first passageway and the first trachea passageway intercommunication formation first air flue on the connecting piece, second passageway and the second trachea passageway intercommunication formation second air flue on the connecting piece, its characterized in that: the outer surface of the cover sac is provided with a raised stopping part. The invention increases the resistance of the backward movement by arranging the stopping part and prevents the laryngeal mask from being extruded outwards to cause displacement.

Furthermore, the stopping part is a plurality of rib structures which are independently arranged or connected into an integral structure, or a plurality of dot structures.

Further, the surface of the stopper is a smoothly curved surface. When the adhesive is in front contact with the mucosa, the damage is reduced, and the stress is reduced.

Furthermore, the trachea outlet at the front end of the mask sac is of an oblique structure, so that the thickness of the front end of the mask sac is reduced, the resistance for placing the laryngeal mask is reduced, the laryngeal mask is prevented from being folded when placed, and the cricoarytenoid joint cannot be excessively pressed.

Furthermore, the shape structure of the mask sac is fitted with the throat structure of a human body, the thickness of the front end of the mask sac is thinner than that of the middle part of the mask sac, and the width of the front end of the mask sac is narrower than that of the middle part of the mask sac, so that the laryngeal mask can be prevented from rotating, the laryngeal mask can be easily inserted, the oppression on an epiglottis is reduced, and the possibility of blocking an airway is reduced.

Further, the trachea outlet section of the first trachea passage is formed by connecting two semi-ellipses with different focal lengths. The part of trachea cannula area bag can be crowded together through meeting in the pipeline, has increased the resistance of passing through, and the shape of export can be earlier release the position crowded together of bag, reduces trachea cannula distortion, deformation, reduces the phenomenon of redirecting, and the airway pipe of being convenient for stretches out.

Further, the cover bag is made of soft materials, and the connecting piece is made of hard materials.

Further, the front end of the air pipe outlet of the second air pipe channel is abutted against the inner end face of the air pipe outlet at the front end of the mask sac. The connecting piece strengthens the position to move forward, increases the hardness of the front end of the laryngeal mask, has a hollow sac at the front end, is not damaged too hard when in intubation, is good in stress, is convenient to operate and place the laryngeal mask, and avoids the laryngeal mask from being inserted to hurt the epiglottis, being inserted into the airway and the like.

Furthermore, the bending angle of the bending part on the airway tube ranges from 85 degrees to 120 degrees, so that the laryngeal mask can be prevented from being extruded outwards.

Further, the mask bag is communicated with an inflation tube for inflating and deflating the mask bag, and the inflation tube is arranged in the airway tube in a penetrating mode.

The invention has the beneficial effects that: is not easy to shift, can not be folded, is easy to insert and can prevent the tissue structure of the human body from being damaged.

Drawings

Fig. 1 is a schematic view of the general structure of the present invention.

Fig. 2 is a schematic view of the internal structure of the present invention.

Fig. 3 is a sectional view of a portion of the structure of the mask bladder of the present invention.

Fig. 4 is a schematic view of the construction of the mask bladder of the present invention.

Fig. 5 is a schematic top view of the connector of the present invention.

Fig. 6 is a schematic view of the internal structure of the connector of the present invention.

Detailed Description

The present invention is further illustrated by the following examples, which are not intended to limit the invention to these embodiments. It will be appreciated by those skilled in the art that the present invention encompasses all alternatives, modifications and equivalents as may be included within the scope of the claims.

Referring to fig. 1, the laryngeal mask comprises a mask bag 1, a connecting piece 2 and an airway tube 3, wherein the connecting piece 2 is arranged in the mask bag 1, the front end of the airway tube 3 penetrates into the mask bag 1 to be communicated with the connecting piece 2, the rear end of the mask bag 1 is hermetically connected with the outer surface of the airway tube 3, a machine end connector 4 is arranged at the end part of the airway tube 3, an inflation tube 5 penetrates through the airway tube 3, an indicating air bag 6 and a one-way valve 7 are arranged on the inflation tube 5, and the mask bag 1 is inflated and deflated through the inflation tube 5.

Referring to fig. 2 and 3, two independent channels are arranged in the airway tube 3, a first channel 31 is communicated with a first airway channel on the connecting piece 2 to form a first airway communicated with the lung, a second channel 32 is communicated with a second airway channel on the connecting piece 2 to form a second airway communicated with the stomach, the two airways are independently arranged, the angle β of the airway tube 3 lifted by the first airway channel on the connecting piece 2 is 25-35 degrees, preferably 28-32 degrees, the trachea can directly and smoothly enter the airway when the trachea is inserted, the bending angle α of the bending part on the airway tube 3 is 85-120 degrees, preferably 90-105 degrees, and the laryngeal mask can be prevented from being extruded outwards.

Referring to fig. 4, the shape structure of the mask sac 1 is fitted with the throat structure of a human body, the thickness of the front end of the mask sac 1 is thinner than that of the middle part of the mask sac 1, and the width of the front end of the mask sac 1 is narrower than that of the middle part of the mask sac 1, so that the rotation of the laryngeal mask can be prevented, the laryngeal mask is easy to insert, the pressure on the epiglottis is reduced, and the possibility of blocking the airway is reduced.

The outer surface of the casing 1 is provided with raised stops 11, preferably on the back and on both sides of the casing, the surface of which is a smooth curved surface. The invention increases the resistance of the backward movement by arranging the stopping part 11, prevents the laryngeal mask from being extruded outwards to cause displacement, reduces the damage and reduces the stress when contacting with the front surface of the mucosa. In the embodiment, three stopping parts 11 with rib structures are arranged on the back of the cover bag 1, and the stopping parts 11 with an integrated structure formed by connecting three ribs are arranged on two sides of the cover bag 1. The rib structure is big fillet or oblique angle with the positive contact of mucosa, reduces the damage, reduces the atress, and the back is little fillet, can increase the resistance, detains in the mucosa the inside. The stopper 11 may have a plurality of dots, and may increase resistance to the mucous membrane.

The trachea outlet 12 at the front end of the mask sac 1 is of an oblique structure, so that the thickness of the front end of the mask sac 1 is reduced, the resistance for placing the laryngeal mask is reduced, the laryngeal mask is prevented from being folded when placed, and the cricoarytenoid joint cannot be excessively pressed.

Referring to fig. 5 and 6, the cross section of the air pipe outlet 21 of the first air pipe channel is formed by connecting two semiellipses with different focal lengths, and a long groove 23 is arranged on the semiellipse with the small focal length. The part of the trachea cannula with the bag can be squeezed together in the pipeline, the passing resistance is increased, the shape of the outlet can release the squeezed part of the bag earlier, the distortion and the deformation of the trachea cannula are reduced, the phenomenon of changing the direction is reduced, and the trachea can stretch out conveniently. The cover sac 1 is made of soft materials, and the connecting piece 2 is made of hard materials. The front end of the trachea outlet 22 of the second trachea channel is abutted against the inner end surface of the trachea outlet 12 at the front end of the mask sac and is spaced from the front end of the mask sac 1, as shown in fig. 3. Because the front end of the soft mask bag 1 is not easy to bear force and can be inserted into the epiglottis or the airway opening when being slightly soft, the position of the connecting piece 2 is strengthened to move forward, the hardness of the front end of the laryngeal mask is increased, the front end is provided with the empty bag, the laryngeal mask is not damaged too hard when being inserted into the trachea, the stress is good, the laryngeal mask is convenient to operate and place, and the epiglottis is prevented from being injured by inserting the laryngeal mask, the airway is prevented from being inserted into the laryngeal mask, and the like. Meanwhile, the front end of the mask bag 1 is short in length, so that the airway resistance is reduced.

When the laryngeal mask is used, the laryngeal mask is inserted into the throat part, the mask sac 1 is inflated through the inflation tube and then is attached to the throat part, sealing and fixing effects are achieved, and the retreating resistance of the laryngeal mask is increased through the stopping part on the mask sac 1. The trachea is respectively inserted into the trachea channel to lead to the airway and the esophagus. The laryngeal mask can provide a channel for spontaneous respiration of a patient and can perform positive pressure ventilation.

Claims

1. Laryngeal mask, including cover bag, connecting piece, air flue pipe, the connecting piece sets up in the cover bag, the front end of air flue pipe penetrates in the cover bag and is connected with the connecting piece intercommunication, the rear end of cover bag and the surface sealing connection of air flue pipe, be provided with two independent passageways in the air flue pipe, first passageway and the first trachea passageway intercommunication formation first air flue on the connecting piece, second passageway and the second trachea passageway intercommunication formation second air flue on the connecting piece, its characterized in that: the outer surface of the cover bag is provided with a raised stopping part which is arranged on the back and two sides of the cover bag; the surface of the stopping part is a smooth curved surface, and the stopping part is a plurality of rib structures which are independently arranged or connected into an integral structure or a plurality of dot structures; the air pipe outlet at the front end of the covering bag is of an oblique arrangement structure; the trachea outlet cross section of the first trachea passage is formed by connecting two semiellipses with different focal lengths, and a strip-shaped groove is arranged on the semiellipse with the small focal length.

2. A laryngeal mask according to claim 1, characterised in that: the shape structure of the mask sac is attached to the throat structure of a human body, the thickness of the front end of the mask sac is thinner than that of the middle part of the mask sac, and the width of the front end of the mask sac is narrower than that of the middle part of the mask sac.

3. A laryngeal mask according to claim 1, characterised in that: the front end of the air pipe outlet of the second air pipe channel is abutted against the inner end face of the air pipe outlet at the front end of the covering bag.

4. A laryngeal mask according to any one of claims 1 to 3, characterised in that: the cover bag is made of soft materials, and the connecting piece is made of hard materials.

5. A laryngeal mask according to claim 4, characterised in that: the bending angle of the bending part on the airway tube ranges from 85 degrees to 120 degrees.

6. A laryngeal mask according to claim 5, characterised in that: the mask bag is communicated with an inflation tube for inflating and deflating the mask bag, and the inflation tube is arranged in the airway tube in a penetrating mode.