CN220276077U - Glottis cover with limiting structure in pyriform fossa - Google Patents

Abstract

The utility model discloses a glottic cover with an internal limiting structure of a pyriform fossa, which is formed by connecting an inflation-free cover body and a ventilation catheter, wherein two pyriform fossa matching limiting parts which are matched with the pyriform fossa of a human body are convexly arranged at the far end of the cover body and are arranged at intervals, the two pyriform fossa matching limiting parts are used for being inserted into the pyriform fossa after the glottic cover is inserted into the human body in place, and the two pyriform fossa matching limiting parts are matched with the pyriform fossa to form the limiting structure of the glottic cover so as to determine that the glottic cover is placed in place and stabilize the glottic cover. The special convex pyriform fossa matched limiting part at the far end of the mask body is more in line with the anatomical structure of the human throat, can be effectively inserted into the pyriform fossa to be matched with the pyriform fossa to form the limiting structure of the glottis mask, plays a role in stabilizing the glottis mask and determining that the glottis mask is placed in place; can make doctors have better operation feeling, can reduce the intubation time and improve the operation safety.

Description

Glottis cover with limiting structure in pyriform fossa

Technical Field

The utility model relates to the technical field of supraglottic ventilation devices, in particular to a supraglottic ventilation device (GMA, glottis Mask Airway) -glottic cover with a limiting structure in a pyriform fossa.

Background

In 1981, dr. Archie Brain studied the anatomical features of both mask ventilation and tracheal intubation, found: the mask is worn far away from the glottis, and the tracheal cannula is inserted through the glottis. He considered to find a "end-to-end" ventilation. He found through research that the shape of the human throat is very similar to the cuff of the nose mask, so that the structure of the tracheal cannula and the nose mask are combined together, and the first laryngeal mask in the world is invented.

In the following time, the laryngeal mask has been continuously optimized and improved, and the most successful change in design should be calculated as an inflatable laryngeal airway device, some of which improved types have been used in the infusion of anesthetic gases since 1988.

A brief history of the development of such ventilators is described in AIJBrain, which is published on pages 5 to 17 (inclusive) of European anesthesia journal (the European Journal of Aesthesiology) 1991, journal 4.

The paper states that: if the breathing tree is considered to be a glottic ending conduit and the aim is to establish a simple connection between said conduit and an artificial conduit supplying gas to the bronchial tree at low pressure, it seems logical to form a direct end-to-end connection between the two conduits. The mask does form an end-to-end connection but its orifice is not suitable, and although the gas-in-conduit meets the correct orifice, it is inserted too far into the bore so that the connection is actually made by an in-bore connection rather than by the orifice edge. Such laryngeal masks have been used in anesthesia procedures since 1988, and there have been many reports of concurrent lesions and/or lesions directly or indirectly associated with the use of such laryngeal masks. Complications and/or lesions are caused by over-inflation and pressure of the balloon lumen pressing against the soft tissue and cartilage structures in contact with the over-inflated balloon.

Attempts have been made to improve such ventilators, but there are still some serious inherent disadvantages. First, the balloon needs to be inflated to an effective degree, whereby anesthetic gases (laughing gases) will be able to diffuse into the balloon, thereby significantly increasing the luminal pressure of the balloon, and the delicate throat tissue will be subjected to considerable pressure. Second, these masks tend to move laterally or rotate about their longitudinal axes when the proximal end of the catheter connected to the anesthesia apparatus is subjected to a force.

Several venting devices are described in the patent literature.

For example, uk patent GB2111394 (corresponding to US 4509514) describes a device for maintaining an airway in a patient. The commercial form of the device has an inflatable collar extending around the circumference of the laryngeal mask. The inflatable collar is adapted to form a seal around the laryngeal opening when the collar is inflated. In addition, the mask portion includes an inflatable back portion adapted to press against the back of the throat, thereby increasing the sealing pressure around the laryngeal opening.

GB2111394 proposes that the shape of the laryngeal mask and (when installed) the inflatable means ensure that the laryngeal mask is very close to the shape of the space between the laryngeal opening and the lower wall of the throat behind the laryngeal opening. Because the tissue walls forming the back of the throat are relatively stiff, inflation of the laryngeal mask forces it more tightly against the tissue surrounding the laryngeal opening, thereby forming an airtight seal, while facilitating the fixing of the laryngeal mask in place.

With the device described in GB2111394, the device is inserted into the patient's mouth and passed down the epiglottis from the throat until the distal end of the laryngeal mask is located in the base of the throat and against the upper end of the normally closed esophagus. The inflatable ring of the laryngeal mask is then inflated to seal around the laryngeal opening. The patient's airway is therefore reliably unobstructed and the laryngeal mask can be directly connected to a conventional anesthesia circuit hose for positive pressure or spontaneous breathing.

U.S. patent (US 5976072) describes a fiber-optic endotracheal intubation device. However, such devices are based on inflatable oropharyngeal balloons, which have the drawbacks described above.

U.S. patent (US 5865176) and British patent (GB 2319182) describe ventilators having a dual inflatable bladder arrangement, a first inflatable bladder for forming a seal of the patient's pharynx and a second inflatable bladder for forming a seal of the patient's oesophageal site. This configuration exacerbates the problem of tissue damage as described above.

British patent (GB 237388) describes a comparative arrangement, namely an inflatable laryngeal mask, with a split-shaped flap designed to prevent interference with the anaerobic during insertion of the mask. But this only emphasizes the function of such an inflatable tubular hood for downward insertion.

In International patent publication No. WO00/61213, a disposable laryngeal mask airway device with an inflatable cuff is described, however, such a device has not only all of the disadvantages of inflatable cuff devices, but also increases the cost and complexity of manufacture due to the multiple components.

Chinese patent CN100531818C describes an improved ventilation device for human and animal ventilation devices, the laryngeal cuff of which is an inflation-free structure, the cuff of which is non-inflatable and is preformed into a shape suitable for forming an anatomical fit over the structure of the patient's throat. The shape contour of the device is complementary with the tissue structure of the throat part, so that the device can form close contact with the irregular structure of the throat part according to the anatomical structure.

The technique of chinese patent CN100531818C describes that its balloon has distinct protrusions or bulges 15, 16 on its face, designed to form a good seal at the piriform fossa and at the aryepiglottic fold (aryepiglottic folds). It should be seen that the outward protrusions of the balloons, labeled 15 and 16, are positioned anterolaterally (ANTERO-LATERALLY) and are adapted to be placed in the piriform fossa and aryepiglottic folds to provide an anatomical seal.

However, according to the description of human laryngeal anatomy and the location of the piriform fossa in the form of the force-First Edition GRAY' SAnatomy, by Susan Standard as a general Edition, it was found that the projections or bulges (15, 16) indicated in the patent do not conform to human anatomy, nor do they have the purported "place in the piriform fossa and aryepiglottic folds" function in actual use, thereby providing an anatomical seal.

From a review of the art, it can be seen that inflatable laryngeal masks have a greater trauma to the patient, causing lesions in the patient that include unacceptable simultaneous physiological changes, but also temporary or permanent anatomical lesions, and the like; in addition, under the condition of different physical characteristics or different symptoms, the inflation amount of the laryngeal mask is difficult to accurately determine when the laryngeal mask is used, so that a certain difficulty in use is brought to the inflation operation of doctors; at the same time, the inflatable laryngeal mask has the risk of air leakage when in use.

The inflation-free laryngeal mask can realize wrapping and sealing on the laryngeal opening without secondary inflation after insertion, but the laryngeal mask can smoothly pass through the oral cavity during insertion, the tongue cannot be obstructed, certain judgment is also required to be made on the insertion depth, and the laryngeal mask cannot be inserted too deeply or too shallowly, otherwise, risks of poor fit and air leakage exist, so that a doctor with insufficient experience can have some problems during insertion operation, the laryngeal mask cannot be ensured to be successfully inserted once and inserted in proper positions, namely too deeply or shallowly, the laryngeal mask and the laryngeal mask cannot be truly attached in place and the laryngeal mask cannot be effectively stabilized, and the laryngeal mask is influenced by subsequent operations.

The above is a description of the prior art relating to laryngeal masks (referred to by the applicant as glottis masks).

Disclosure of Invention

Aiming at the technical defects existing in the prior art, the utility model provides the glottic cover with the limiting structure in the pyriform fossa, wherein the limiting structure in the convex pyriform fossa arranged at the far end of the cover body is more in accordance with the anatomical structure of the throat of a human body, and the glottic cover is really matched with two pyriform fossa of the human body, can be effectively filled into the pyriform fossa to form close connection with the pyriform fossa, and can play a role in stabilizing the glottic cover and determining the placement of the glottic cover by the design of certain height and shape.

The technical scheme adopted for realizing the purpose of the utility model is as follows:

the glottic cover with the internal limiting structure of the pyriform fossa is formed by connecting an inflation-free cover body and a ventilation catheter, wherein the internal limiting structure of the pyriform fossa is convexly arranged at the far end of the cover body, and comprises two pyriform fossa matched limiting parts which are mutually arranged at intervals and matched with two pyriform fossa of a human body; the mask body enters and stretches into the laryngeal opening through the oral cavity of the human body, when the mask body covers the laryngeal opening of the human body and the laryngeal opening of the human body form close contact conforming to the anatomical structure of the human body, the two pyriform fossa cooperation limiting parts are inserted into one pyriform fossa respectively corresponding to form a limiting structure of the glottis mask in cooperation with the pyriform fossa, and the mask body is limited to ensure that the glottis mask is placed in place and the glottis mask is stabilized.

As a preferred scheme, the two pyriform foss are matched with the limiting parts to be arranged at intervals relatively, so that the far end of the cover body forms an M-shaped structure. The two pyriform foss are matched with the limiting parts in the same structure shape, are symmetrically arranged at intervals, and have the distal ends formed into an inverted V-shaped tip structure, so that the pyriform foss can be conveniently inserted into the two pyriform foss after being placed.

As a preferable scheme, the two pyriform foss are matched with the limiting parts and the cover body to form an integrated structure, and the two pyriform foss and the cover body are formed into an integrated structure through die injection.

As a preferred solution, a gastric tube channel is provided, said gastric tube channel being arranged alongside said airway tube, said gastric tube channel leading from a proximal end to a distal end of said housing, with a distal opening located on one of two opposite sides between said pyriform fossa mating stop.

As a preferable scheme, the cover body is provided with a soft tissue closed ring, the soft tissue closed ring is convexly arranged on the outer surface of the opening side of the cover body, and after the cover body is covered on the laryngeal opening of the human body, the soft tissue closed ring and the outer peripheral side of the laryngeal opening of the human body form close contact conforming to the anatomical structure of the human body.

As a preferable scheme, the back of the cover body is provided with at least one groove, and the groove is used for taking out the sputum of the throat of a patient entering the cover body out of the body together when the cover body placed in the throat of the human body is pulled out; the grooves are round grooves and/or arc-shaped grooves.

As a preferable scheme, an epiglottis support is arranged in the opening of the cover body and is used for supporting the epiglottis of a human body after the cover body is inserted into a preset position, so that the epiglottis is in an open state and is prevented from being closed.

As a preferred aspect, the epiglottis support has an airway passage therein, the airway passage opening into the proximal end of the housing and being connected to the airway passage of the airway tube to form a sealed airway.

As a preferred scheme, the cover body and the ventilation catheter are connected into a whole to form a fixed connection or a detachable connection or be directly processed into an integrated structure.

As a preferable scheme, the cover body is made of medical elastic materials, such as soft gel-like medical thermoplastic elastomer materials, and the cover body can be changed in shape with the anatomical change of the oral cavity and the pharyngeal part in the placing process in a small extent, so that the cover body can be more suitable for the anatomical structure of a human body.

The utility model has the advantages that the special convex limiting structure in the pyriform fossa at the far end of the cover body accords with the anatomical structure of the human throat, more accords with the anatomical structure of the human throat, truly realizes the insertion fit with two pyriform fossa of the human body, can be effectively inserted into the pyriform fossa to be in contact fit with the pyriform fossa, and can play a role in stabilizing the glottis cover and determining the placement of the glottis cover in place through the design of a certain height and a certain shape by being matched with the pyriform fossa to form the limiting structure; thereby leading doctors to have better operation feeling, reducing the intubation time and improving the operation safety.

Drawings

Fig. 1 is a schematic overall side view of a human laryngeal anatomy.

Fig. 2 is a schematic back view of the bony structure of the human laryngeal.

Fig. 3 is a schematic diagram of the front of a human laryngeal structure.

Fig. 4 is a schematic view of a laryngeal cross-parabolic surface of a human laryngeal anatomy.

Fig. 5 is a first schematic view of a glottis cover with a single-cavity structure according to an embodiment of the present utility model.

Fig. 6 is a second schematic view of a glottis cover with a single-cavity structure according to an embodiment of the present utility model.

Fig. 7 is a third schematic view of a glottis cover with a single-cavity structure according to an embodiment of the present utility model.

Fig. 8 is a fourth schematic view of a glottis cover with a single-cavity structure according to an embodiment of the present utility model.

Fig. 9 is a fifth schematic view of a glottis cover with a single-cavity structure according to an embodiment of the present utility model.

Fig. 10 is a first schematic view of a glottis cover with a dual-cavity structure according to an embodiment of the present utility model.

Fig. 11 is a second schematic view of a glottis cover with a dual-cavity structure according to an embodiment of the present utility model.

Fig. 12 is a third schematic view of a glottis cover with a dual-cavity structure according to an embodiment of the present utility model.

Fig. 13 is a first schematic view of a glottis cover of another single-chamber structure according to an embodiment of the present utility model.

Fig. 14 is a second schematic view of a glottis cover with another single-chamber structure according to an embodiment of the present utility model.

Fig. 15 is a third schematic view of a glottis cover with another single-cavity structure according to an embodiment of the present utility model.

Fig. 16 is a schematic view of the glottis mask according to an embodiment of the present utility model after insertion into a human body.

Fig. 17 is a schematic view of the cooperation of the glottic cover with the pyriform fossa according to the embodiment of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the drawings and the specific examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the present specification, proximal or proximal refers to the end closest to the ventilator system, i.e., the end away from the patient or patient, and distal or distal refers to the end furthest from the ventilator system, i.e., the end closest to the patient or patient. The proximal and distal portions are used primarily for illustration of the housing and airway tube positions.

The anatomy of the human throat, see fig. 1-4, shows different views of the throat and laryngo pharynx anatomy. These illustrations were taken from the force-First Edition GRAY' S Anatomy, susan Standard, which is a general Edition. The names corresponding to the reference numerals in the drawings are described as follows:

a-trachea, B-esophagus, C-cricoid plate, D-arytenoid, E-epiglottis, F-tongue, G-forma cartilage, H-glottis, I-epiglottis, J-tongue root, K-arytenoid notch, L-pyriform fossa.

Referring to fig. 1 to 4, in the anatomy of the human throat, there are two piriformes (piriformes), a deep fossa formed submucosally between the sides of the laryngeal opening and the inner aspect of the thyroid cartilage, the arytenoid epiglottis fold up, down to the esophageal opening, anterior thyroid cartilage and thyroid cartilage membrane, and the rest is the laryngopharyngeal wall penetration; in fact, the piriform fossa is not a "fossa", but a channel for food; the passage of the food is an irregular gap, not a "space". The left and right sides of the pyriform fossa are respectively provided with a cone which is shaped like a cone with the tip part facing downwards, and the lower part of the pyriform fossa is provided with an esophagus entrance. The position is more hidden, more mucous membrane folds exist, and the external front part takes the thyroid cartilage as a bracket. When swallowing food, the epiglottis can cover the glottis and the food passes through the pyriform fossa into the esophagus.

The inventor of the application finds that if the distal end of the glottic mask is provided with a special structure in the using process, after the glottic mask is inserted into a laryngeal pharynx, if the glottic mask can be inserted into a channel or a space formed by the pyriform fossa, the limiting effect of the placement of the glottic mask can be achieved, and the too deep insertion or the insufficient insertion depth can be prevented. Therefore, the special structure can ensure that the glottis cover is placed at an ideal position and can stabilize the glottis cover after being inserted in place to prevent displacement or movement.

The inventor of the application discovers that two pyriform foss exist at the anatomical structure of the human laryngeal inlet through researching the anatomical structure of the human laryngeal inlet, if a convex matching structure is arranged at the distal end of the glottic mask, the corresponding limiting effect is formed by utilizing the anatomical features of the two pyriform foss, the functions and the effects can be realized, and the effects of limiting the inserted position of the glottic mask and stabilizing or stabilizing the inserted glottic mask are achieved.

To this end, the applicant has provided at the distal end of the mask body (also called the mask capsule) of the glottic mask two projections (hereinafter called internal limiting structures of the pyriform fos) corresponding to said pyriform fos, generally symmetrically arranged, corresponding to the two pyriform fos. After the mask body of the glottic mask can be covered on the laryngeal opening of a human body to realize close connection with the laryngeal opening, the close connection conforming to the anatomical structure of the human body is achieved, and the channels or spaces of the two pyriform fossa are inserted by the limit structure in the pyriform fossa and are matched with the pyriform fossa to form a limit effect, so that the problem that the glottic mask cannot be effectively ensured to reach an ideal position in the process of placing the glottic mask by a doctor is solved, and the close connection type package with the laryngeal opening is realized.

Referring to fig. 5 to 9, a glottic cover with a limiting structure in a pyriform fossa according to an embodiment of the present utility model is formed by connecting an inflation-free cover body 2 and an airway tube 1. The shape and the outline of the opening 4 in the mask body 2 are matched with the laryngeal structure of a human body; the distal end of the outer cover body 2 is convexly provided with a limiting structure in the pyriform fossa, and the limiting structure in the pyriform fossa comprises two pyriform fossa matching limiting parts 3 which can be matched with the anatomical structures of the two pyriform fossa at the laryngeal opening of a human body; the two pyriform foss are matched with the limiting parts 3 to be arranged at intervals, the mask body 2 enters through the oral cavity of a human body and stretches into the laryngeal opening, the opening 4 of the mask body 2 covers the laryngeal opening of the human body, when the mask body and the laryngeal opening of the human body can form close contact with the anatomical structure of the human body, the two pyriform foss matched with the limiting parts 3 can be inserted into one pyriform foss corresponding to the pyriform foss respectively to form a limiting structure for the placement position of the glottic mask, the placement position of the glottic mask is limited, and meanwhile, the effect of stabilizing the glottic mask and preventing the displacement or the movement of the glottic mask can be achieved.

In some embodiments, the distal end of the airway tube is connected to the proximal end of the housing and is surrounded by the housing to form a unitary structure, or the airway tube is integrally formed with the housing.

The ventilation catheter 1 may be in various specifications, may be a single-cavity ventilation catheter or a dual-cavity ventilation catheter, may have a circular or non-circular cross section, may be used to perform ventilation alone or meet the requirement of the insertion of various types of endoscopic devices such as gastroscopes and bronchoscopes, and the structure thereof is not limited to the structure of the ventilation catheter given in the specification and the drawings of the specification.

In addition, the opening 4 of the cover 2 may have different shapes, such as a cone shape, a horn shape, a bowl shape, an ellipse, an olive shape, etc. Has a shaped opening 4 with an outer surface having an annularly arranged soft tissue closure ring 8 and an outlet 9 of the inner passage inside the opening 4. The inlet 7 of the inner channel is located at the proximal end of the airway tube and may be provided with a corresponding connector by means of which it is possible to connect with a corresponding device, such as a ventilator or the like, for ventilation.

In the embodiment of the utility model, after the mask body 2 extends into the laryngeal opening, the pear-shaped fossa cooperation limiting part 3 positioned at the far end can extend into and be filled into an irregular channel or space formed by the corresponding pear-shaped fossa to form contact cooperation with the pear-shaped fossa, so that the limiting effect on the glottis mask is realized, the insertion of the mask body is ensured not to be too deep or too shallow, and the effect of stabilizing the glottis mask is realized. The opening 4 can just cover the laryngeal opening of the human body at this time, so as to seal the laryngeal opening of the human body and form an end-to-end sealed artificial airway.

The two pyriform foss are matched with the limiting parts and the cover body to form an integrated structure, and the pyriform fos can be formed through injection molding by a die. The two pyriform foss are matched with the limiting parts to be arranged in a relatively spaced mode, and therefore the far end of the cover body is in an M-shaped structure when being observed in the front view direction.

The two pyriform foss are matched with the limiting parts in the same structure shape and are symmetrically arranged at intervals, the distal ends 31 of the pyriform foss form an inverted V-shaped chamfer-shaped tip structure or a conical structure, the inverted V-shaped chamfer-shaped tip structure or the conical structure is convenient to insert into the two pyriform foss after being placed, and the pyriform foss form close contact with the inner wall surfaces of irregular channels or spaces formed by the pyriform foss, so that the pyriform foss are matched with the pyriform foss, and the glottic cover placement limiting structure is formed.

In some embodiments, an epiglottis support 5 is provided in the opening 4 of the mask body, for supporting the epiglottis after the mask body is put in place, preventing the epiglottis from closing, and preventing the epiglottis from blocking the airway due to reverse folding of the air flow, thereby exposing the glottis and quickly and safely establishing an artificial airway. In some embodiments, the epiglottis support 5 is positioned within the opening of the mask body, the epiglottis support plane is lower than the plane of the mask body opening 4, the epiglottis support and the airway tube may be of unitary construction and have an outlet 9 on the side of the epiglottis support. Wherein the airway tube may be used for endotracheal intubation and thus the outlet 9 may be an endotracheal tube outlet or an airway outlet.

In addition, the epiglottis support of the structure shown in fig. 5 to 9 may not be provided, and the glottic cover with the limiting structure 3 in the pyriform fossa of the double chamber structure according to the other embodiment shown in fig. 10 to 12 may not be provided. As another example, referring to fig. 13 to 15, the single-lumen structure of the glottis mask with the internal limiting structure 3 of the pyriform fossa is not provided with the epiglottis support of the structure shown in fig. 5 to 9. In addition, a plurality of known epiglottis supporting structures or epiglottis lifting fences and the like can be arranged to realize the same functions and prevent the epiglottis from blocking the air outlet and blocking the airway;

in some embodiments, the grooves 6 on the back of the mask body can be designed to take the sputum of the throat formed by the throat of the patient into the mask body out of the mask body when the glottic mask is pulled out, and the grooves can be circular grooves and/or arc-shaped grooves, can be one or more of interval arrangement or any other arrangement.

In some embodiments, a tongue root stabilization platform 14 is disposed at the proximal end of the mask body of the glottic mask, the tongue root stabilization platform 14 being below a defined plane of the mask body opening, with two sides extending to two sides of the airway tube. The tongue root stabilization platform 14 serves to stabilize the tongue root after the glottic mask is inserted into place.

In some embodiments, referring to fig. 10 to 12, the structure of the cover of the dual-cavity structure is the same as that of the single-cavity structure of the glottis cover disclosed in the foregoing embodiments of fig. 5 to 9, and a corresponding piriform fossa matching limiting portion 3 is disposed at the distal end of the cover, and the structure and function thereof are the same as those of the single-cavity structure of the glottis cover disclosed in the embodiments of fig. 5 to 9, and are not repeated herein.

Referring to fig. 10 to 12, a gastric tube channel 11 is provided, the gastric tube channel 11 is located at one side of the ventilation catheter and is integrally connected to form a dual-cavity tube structure 12, the gastric tube channel 11 is led to the distal end of the cover body from the proximal end of the ventilation catheter, and a distal opening 13 is located on one of two opposite sides between the two pyriform fossa cooperation limiting parts 3.

The stomach tube channel can be independent, with the airway tube bonds together or forms through the integrated shaping of manufacturing process, stomach tube channel and airway tube parallel arrangement, can prefabricate into the shape of certain crookedness there is the opening of stomach tube channel the distal end of the cover body, through the stomach tube channel, can be after the pyriform nest is filled by pyriform nest cooperation spacing portion 3 and is formed sealedly, make the stomach tube pass through this stomach tube channel, carry out human stomach through the esophagus, extract gastric juice, perhaps be used for the stomach decompression, avoid gastric acid to reflux to reduce the risk of pulmonary aspiration.

The cross-sectional shape of the gastric tube passageway may be circular, flat or oval or D-shaped, etc., and the cross-sectional shape of the airway tube may be circular, flat or oval or D-shaped, etc., or any known shape.

In some embodiments, the mask body may be made of any suitable soft plastic material having a soft, deformable, yet fixedly shaped surface that can conform to the laryngeal opening to minimize potential damage to the laryngeal opening tissue while still providing good sealing.

In addition, the limiting structure in the pyriform fossa integrally formed with the cover body has corresponding flexibility and is deformable, so that the damage in the pyriform fossa can be reduced when the limiting structure is matched with the pyriform fossa.

In a preferred embodiment, the mask body is made of a nontoxic and high-softness TPE material, namely a thermoplastic elastomer (thermoplastic elastomer), which has rubber-like plasticity and has the elasticity and shape memory of vulcanized rubber, and the material is environment-friendly, halogen-free, nontoxic and tasteless, does not contain compounds such as plastic softeners, phthalate, heavy metals and the like, can provide the same softness as the laryngeal tissues of a patient, reduces the compression on the laryngeal tissues of the patient and reduces the occurrence of throat pain after operation; the throat-sealing plastic bag has certain plasticity, can perfectly wrap the throat, avoids air leakage, improves comfort level of patients in use, and reduces discomfort symptoms of the throat of the patients after operation.

After the product is inserted into the throat position of a human body, the distal mask body can tightly wrap the throat opening of the human body (the throat opening is formed by epiglottis, arytenoid folds on two sides and a notch between arytenoids) and form close connection with the throat opening of the human body according to an anatomical structure, meanwhile, the distal limit structure of the mask body can be filled into the corresponding pyriform fossa and closely connected with the two pyriform fossa of the human body to form the corresponding limit structure, limit the placement position of the mask body, and ensure that the placement position of the mask body accords with expectations, thereby realizing the establishment of an ideal end-to-end sealed artificial airway to ensure smooth ventilation in surgery; meanwhile, the intubation requirements of endoscopic equipment such as stomach tubes, bronchofiberscopes and the like can be met.

The ventilation duct in the embodiment of the present utility model may be any ventilation duct structure of a glottic mask or an upper ventilation duct device known in the prior art, may be a circular tube or a flat tube with a cross section, may be a straight tube or a tube with a predetermined curvature, and is not limited by the present utility model.

The glottic cover with the internal limiting structure of the pyriform fossa, which is disclosed by the embodiment of the utility model, is an inflation-free glottic cover, optimizes the appearance structure according to clinical feedback, is more in line with the anatomical structure of the throat, effectively reduces the obstruction condition of the tongue during insertion, and meanwhile, the designed internal limiting structure of the pyriform fossa is convenient for the insertion and positioning of the glottic cover, so that the sealing effect on the throat after the insertion is good; and the operation of doctors is more convenient, the operation is safer, and the discomfort of the throat of patients after operation can be effectively reduced.

In a word, the glottic cover with the limiting structure in the pyriform fossa, provided by the embodiment of the utility model, can enable a doctor to have better operation feeling, improve the success rate of inserting the glottic cover, reduce the intubation time and improve the operation safety.

While the fundamental and principal features of the utility model and advantages of the utility model have been shown and described, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof;

the present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (10)

1. The glottic cover with the internal limiting structure of the pyriform fossa is formed by connecting an inflation-free cover body and a ventilation catheter, and is characterized in that the internal limiting structure of the pyriform fossa is convexly arranged at the far end of the cover body, and comprises two pyriform fossa matched limiting parts which are mutually arranged at intervals and matched with two pyriform fossa of a human body; the mask body enters and stretches into the laryngeal opening through the oral cavity of the human body, when the mask body covers the laryngeal opening of the human body and the laryngeal opening of the human body form close contact conforming to the anatomical structure of the human body, the two pyriform fossa cooperation limiting parts are inserted into one pyriform fossa respectively corresponding to form a limiting structure of the glottis mask in cooperation with the pyriform fossa, and the mask body is limited to ensure that the glottis mask is placed in place and the glottis mask is stabilized.

2. The glottic cover with internal limiting structure of the pyriform fossa of claim 1, wherein the two pyriform fossa mating limiting portions are arranged in a relatively spaced apart relationship such that the distal end of the cover forms an M-shaped structure.

3. The glottic cover with internal limiting structure of the pyriform fossa according to claim 1, wherein two of said pyriform fossa cooperating limiting portions are of unitary construction with said cover body.

4. The glottic mask with internal limiting structure of pyriform fossa according to claim 1, wherein the mask body is provided with a soft tissue closing ring, the soft tissue closing ring is convexly arranged around the opening surface of the mask body, and the mask body is covered on the laryngeal opening of the human body, and the soft tissue closing ring forms close contact with the peripheral side of the laryngeal opening of the human body according to the anatomical structure of the human body.

5. A glottic cover with internal limiting structure of pyriform fossa according to claim 1, characterized in that a gastric tube channel is provided, said gastric tube channel being arranged side by side with said airway tube, said gastric tube channel leading from a proximal end to a distal end of said cover body, with its distal opening being located on one of two opposite sides between two of said pyriform fossa mating limiting portions.

6. The glottic cover with limiting structure in pyriform fossa according to claim 1, wherein the back of the cover body is provided with at least one groove for taking out the sputum of the patient's throat into the cover body when the cover body placed in the throat of the human body is pulled out.

7. The glottic cover with internal limiting structure of pyriform fossa according to claim 1, wherein an epiglottis support is provided in the opening of the cover body for supporting the epiglottis of the human body after the cover body is inserted into the predetermined position, so that the epiglottis is in an open state, preventing the epiglottis from being closed.

8. The glottic mask with internal limiting structure of the piriform fossa of claim 7 wherein the interior of the epiglottis support has a vent passage leading to the proximal end of the mask body and connected to the interior passage of the vent conduit to form a sealed airway.

9. The glottic cover with internal limiting structure of pyriform fossa of claim 1, wherein said cover body and ventilation catheter are connected as one piece or are manufactured as one piece.

10. The glottic cover with internal limiting structure of pyriform fossa according to claim 1, wherein said cover body is made of medical elastic material.