CN221771172U - Glottic mask catheter - Google Patents

Abstract

The utility model discloses a glottic cover catheter, which comprises a cover body and a tube body connected with the cover body; the far end of the cover body is provided with two convex pyriform nest matching parts which are mutually spaced and a concave part which is positioned between the two pyriform nest matching parts; an air passage is formed in the tube body and communicated to the inner side of the cover body, and a passage opening of the air passage faces the far end of the cover body; in the longitudinal section of the glottic cover catheter, the part of the cover body located at the far end to the passage opening of the air passage is an extension section of the lower wall of the tube body. By adopting the technical scheme, the glottic mask catheter disclosed by the utility model has the advantages that the distal end of the mask body is not inserted into the annular cartilage rear area gap, so that the operation is easier to complete in the process of inserting the mask body, the damage to the laryngeal tissues of a patient is reduced, the postoperative pain of the patient is reduced, meanwhile, the passage opening of the airway can be opposite to the glottis, the tracheal cannula can be smoothly placed, and the ventilation efficiency can be improved.

Description

Glottic cover catheter

Technical Field

The utility model relates to a glottic cover catheter, and belongs to the technical field of medical appliances.

Background

Laryngeal masks (LARYNGEAL MASK, LM) are a medical device used to maintain the airway of a patient, and are commonly used during anesthesia and surgery. Similar to the mask being snapped over the outside of the mouth and nose for assisted breathing, the laryngeal mask is inserted from the patient's mouth to the larynx and the mask is snapped over the outside of the laryngeal opening for assisted breathing. It is also called glottic mask (Glottis Mask, GM) because it belongs to one of the supraglottic airways. The concept of laryngeal masks was first proposed by british anesthesiologist Ai Demo & cloth Landon (Archibald Brain) in 1983. He envisages a device that enables easier and more efficient maintenance of the airways, instead of the traditional face mask and endotracheal tube, the idea of cloth Landon eventually forming the first laryngeal mask in the world, and called laryngeal mask airway device (LARYNGEAL MASK AIRWAY, LMA), secured to the larynx by an inflated balloon, allowing gas to flow into the airways. In the African medical society held in south Africa, month 9 of 2002, a Tangmi le (Doppler Miller) doctor has received extensive attention to streamline pharyngeal airways (STREAMLINED LINER of PHARYNGEAL AIRWAY, SLIPA). The inflation-free laryngeal mask emphasizes the linear fit with the upper airway structure of the glottis and has a simple shape formed at one time by a blow molding method. In 2003, doctor mercaptane askem nalcile (Muhammed ASLAM NASIR) from pakistan invented a cuff-free laryngeal mask and patented an improved ventilation device as disclosed in chinese patent document CN 100531818C.

The laryngeal masks have been developed over the next 20 years in view of improvements in materials and combined applications of information technology (e.g., visual laryngeal masks), but have largely continued the past design principles. However, in 2023, chinese patent document CN116350891a discloses a glottic cover with a limiting structure in a pyriform fossa, which creatively proposes that a convex pyriform fossa matching limiting part is arranged at the distal end of the cover body, which is more in line with the anatomical structure of human throat, and can be effectively inserted into the pyriform fossa to be matched with the pyriform fossa to form the limiting structure of the glottic cover, thereby playing a role in stabilizing the glottic cover, determining that the glottic cover is placed in place, enabling doctors to have better operation feeling, reducing intubation time and improving operation safety, and having epoch-making significance.

The sealing action, whether an inflatable cuff-type laryngeal mask or a non-cuff-type laryngeal mask, is an important feature that is critical to maintaining a patent's clear airway and requires an effective sealing connection with the laryngeal opening when inserted into the patient's mouth and over the laryngeal opening.

As shown in fig. 1-3, the oral cavity of a human being communicates with the trachea 101 and the esophagus 102, with the laryngeal opening 103 being located at the intersection of the trachea and the esophagus. Laryngeal opening 103 is the upper opening of laryngeal cavity 104 and is defined by the upper epiglottis edge 105a, arytenoid plication 106 and arytenoid notch 107. The glottis 108 is located within the laryngeal cavity 104, i.e., in the lower portion of the laryngeal opening 103, and is the opening between the two lobes of the vocal cords 108 a. The arytenoid plication 106 is a triangular mucosal fold (plication-non-bony joint) that wraps around ligaments and muscle fibers, extending from the lateral margin of the epiglottis to arytenoid cartilage 109, the plication being triangular, narrow in front, wide in back, sloping downward and rearward. The arytenoid plication 106 is anteriorly constrained by the epiglottis 105; and later, will be bounded by the tip of arytenoid cartilage 109, small angle cartilage 110 and arytenoid notch 107. The tracheal wall is supported by the cricoid 111 and therefore does not collapse to ensure smooth ventilation, while the esophagus 102 is normally in a flattened state and is only lifted when food is introduced. The cricoid cartilage 111 is located below the thyroid cartilage 112 in the shape of a ring, with a front portion being narrow and low, called a cricoid bow 111a, and a rear portion being high and broad, called a cricoid plate 111b, and the arytenoid cartilage 109 and the small angle cartilage 110 are located above the cricoid plate 111 b. The tip of arytenoid cartilage 109 is attached to small angle cartilage 110. During breathing, the epiglottis 105 is lifted, the laryngeal opening 103 is opened to allow ventilation of the trachea 101, and an epiglottis valley 116 is formed between the epiglottis 105 and the tongue root 115; during feeding, the epiglottis 105 hangs down closing the laryngeal opening 103 to prevent food or water from entering the trachea. The deep fossa formed by the depression of the mucosa between the inner face of the thyroid cartilage and the cricoid cartilage on both sides of the laryngeal opening 103 is called the pyriform fossa, rather than the "fossa", but rather the irregular gap, upon feeding, food or water falls on the epiglottis 105 and slides sideways into the pyriform fossa 113, passes through the pyriform fossa 113 and down into the esophagus 102, rather than directly through the cricoid posterior space 114.

During use of the laryngeal mask, in order to ensure that the laryngeal mask forms a good seal, the healthcare worker typically inserts the distal end 1b of the mask body 1 into the cricoid posterior space 114 (i.e. the gap between the cricoid plate and the posterior pharyngeal wall) such that the mask body 1 applies a forward compressive force to the cricoid 111. Since insertion of the distal end of the mask body 1 too far causes destruction of connective tissue in the cricoid posterior space 114, the body tissue and blood of the patient often adhere to the mask body when the laryngeal mask is pulled out of the mouth of the patient. Meanwhile, since the arytenoid epiglottis fold 106 is inclined, the laryngeal opening 103 is a beveled opening, and the mask body of the laryngeal mask is also generally configured with a thin distal end and a thick proximal end to adapt to the configuration of the laryngeal opening 103, while the airway opening of the conventional laryngeal mask is also generally opposite to the laryngeal opening rather than the glottis, which results in an S-shaped bent path between the airway inside the laryngeal mask and the glottis and trachea, as shown in fig. 4, affecting ventilation efficiency. When the trachea cannula is put into operation, as shown in fig. 5, the trachea cannula 100 is required to be bent and then fed to the laryngeal inlet, and then reversely bent and fed to the glottis after entering the laryngeal inlet, and the bent path causes an obstacle in the process of introducing medical instruments such as the trachea cannula, the bronchus occluder, the endoscope and the like.

Disclosure of Invention

It is therefore an object of the present utility model to overcome the above-mentioned drawbacks of the prior art and to provide a glottic mask catheter which enables direct ventilation directly against the glottis.

In order to achieve the above object, the present utility model provides a glottic cover catheter, comprising a cover body and a tube body connected to the cover body; a concave cavity is formed at the inner side of the cover body, an air passage is arranged in the pipe body and communicated with the concave cavity, and a passage opening of the air passage faces the far end of the cover body; the far end of the cover body is provided with two convex pyriform nest matching parts which are mutually spaced and a concave part which is positioned between the two pyriform nest matching parts; in the longitudinal section of the glottic cover catheter, the part of the cover body from the far end to the passage opening is an extension section of the lower wall of the tube body, and the passage opening can realize direct ventilation against the glottis.

The pyriform fossa mating portion has a thickness greater than a thickness of the recessed portion.

The pyriform nest matching part protrudes out of the concave part towards the inner side of the cover body.

The outer side wall of the cover body is provided with a thickened part which is arched in an arc shape.

An arc-shaped concave part is arranged on the bottom wall of the concave cavity.

The concave part is provided with a front end which is in a smooth arc chamfer shape.

A distal opening is arranged at the end part of at least one pyriform fossa matching part, and a stomach tube channel communicated with the distal opening is arranged at the side part of the tube body.

The ends of the two pyriform foss matching parts are respectively provided with a far-end opening, and the two stomach tube channels are symmetrically distributed on two sides of the tube body.

An epiglottis support is arranged on the inner side of the cover body.

A limiting plate part is arranged above the epiglottis support, and an accommodating cavity with an opening is formed between the limiting plate part and the epiglottis support.

The end of the limiting plate part extends towards the distal direction and protrudes out of the end of the epiglottis support.

In the longitudinal section of the glottic cover catheter, the epiglottis support is an extension of the upper wall of the tube.

The distal side of the epiglottis support has a wedge-shaped guide surface.

By adopting the technical scheme, the glottic mask catheter disclosed by the utility model has the advantages that the mask body extends into the laryngeal opening through the oral cavity of a human body and covers the laryngeal opening of the human body, the mask body and the laryngeal opening of the human body form close contact with the anatomical structure of the human body, and when the pyriform fossa matching part is inserted into the pyriform fossa, the pyriform fossa can be propped up; because the two pyriform foss matching parts are convex relative to the concave parts, the concave parts cannot be inserted into the gap between the annular cartilage plate and the pharyngeal rear wall, so that the connective tissues in the region cannot be damaged, and the postoperative pain of a patient is relieved; meanwhile, the passage opening of the air passage faces the far end of the mask body, the part between the far end and the passage opening on the mask body in the longitudinal section is an extension section of the lower wall of the tube body, when the passage opening blows out, the air flow is not just right to the laryngeal opening with an inclined surface, but just right to the glottis below the laryngeal opening, thereby being beneficial to improving ventilation efficiency, more importantly, the implantation path is smooth arc-shaped in the operation process of implanting devices such as a tracheal cannula, a bronchus occluder, an endoscope and the like, the former S-shaped bending path is avoided, the success rate of the tube implantation can reach hundred percent under the conditions of normal anatomy and no occupied space, the tube implantation efficiency is effectively improved, and especially, the tube implantation efficiency is revolutionarily changed in the rescue process of emergency and critical patients.

Drawings

Fig. 1 is a schematic diagram of a human laryngeal construction.

Fig. 2 is a schematic view of a glottic site configuration.

Fig. 3 is a top view of a glottic site configuration.

Fig. 4 is a schematic diagram showing ventilation after the laryngeal mask is placed in the oral cavity in the prior art.

Fig. 5 is a schematic view showing the state of performing tracheal intubation after the laryngeal mask is placed in the oral cavity in the prior art.

Fig. 6 is a perspective view of a first embodiment of a glottic cover catheter of the present utility model.

Fig. 7 is a perspective view of the first embodiment.

Fig. 8 is a front view of the first embodiment.

Fig. 9 is a top view of the first embodiment.

Fig. 10 is a longitudinal sectional view of the first embodiment.

Fig. 11 is a partial cross-sectional view of the first embodiment.

Fig. 12 is a schematic view showing a state in which a glottic catheter according to the first embodiment is inserted into the oral cavity and then trachea cannula is performed.

Fig. 13 is a perspective view of the second embodiment.

Fig. 14 is a front view of the second embodiment.

Fig. 15 is a plan view of the second embodiment.

Fig. 16 is a longitudinal sectional view of the second embodiment.

Fig. 17 is a longitudinal sectional view of the third embodiment.

Fig. 18 is a top view of the third embodiment.

Detailed Description

The utility model is described in further detail below with reference to the drawings and the detailed description.

Embodiment one:

As shown in fig. 6 to 9, the present embodiment provides a glottic cover catheter including a cover 1 and a tube 2 connected to the cover 1. The inner side of the cover body 1 forms a concave cavity 1a, the air passage 3 is arranged in the pipe body 2 and communicated with the concave cavity 1a, and a passage port 31 of the air passage 3 is arranged towards the distal end of the cover body 1. The whole mask body 1 is in a wedge shape with a thin far end and a thick near end, the shape and the outline of the opening edge of the concave cavity 1a correspond to those of the laryngeal structure of a human body, and the mask body 1 can be covered on the laryngeal of the human body to achieve close contact according with the anatomical structure of the human body.

The distal end 1b of the housing 1 is provided with two convex pyriform fossa mating portions 4 spaced apart from each other and a recess 5 located between the two pyriform fossa mating portions 4. The thickness of the pyriform fossa fitting portion 4 is larger than that of the recess portion 5, and the pyriform fossa fitting portion 4 protrudes from the recess portion 5 toward the inside of the cover body 1. In this embodiment, the pyriform socket mating parts 4 are of single-body protruding structures, but in other embodiments, each pyriform socket mating part may be of a combined protruding structure formed by a group of small protruding blocks. The back of the mask 1 (opposite side of the opening of the cavity 1 a) forms a flat curved surface which can be pressed against the mucosal tissue of the posterior pharyngeal wall. When the mask body 1 is put into the oral cavity of a human body and covered on the laryngeal opening, the pyriform fossa matching part 4 can enter into the pyriform fossa and fill irregular gaps of the pyriform fossa, so that the pyriform fossa is supported, and the mucous membrane tissue of the pyriform fossa part wraps the pyriform fossa matching part 4. The recess 5 can be provided in a number of different wall thickness formats to achieve different relative positions of the arytenoid cartilage, for example, it can be pressed over the arytenoid epiglottis fold when the recess 5 is thicker and into the gap between the arytenoid cartilage and the posterior side of the small angle cartilage and the posterior pharyngeal wall when the recess 5 is thinner, the distance of the recess 5 into the gap can be made shorter due to the mutual limiting action between the pyriform socket mating part 4 and the pyriform socket.

As shown in fig. 10, in the longitudinal section of the glottic mask catheter, the portion from the distal end 1b to the passage opening 31 of the mask body 1 is an extension section a of the lower wall of the tube body 2, no protrusion for blocking the air flow is formed on the extension section a, and the passage opening 31 is opposite to the glottis, so that when oxygen is introduced into the air passage 3, the air flow can flow out from the passage opening 31 and blow straight towards the glottis without being blocked. On the other hand, as shown in fig. 12, when the tracheal cannula 100 (or other devices such as a bronchus occluder and an endoscope) is fed into the trachea through the airway 3, the device does not need to be bent after entering the laryngeal inlet because the passage opening 31 of the airway 3 is opposite to the glottis, and can directly extend forward to pass through the glottis, so that the complexity of the operation steps can be reduced, the efficient and rapid tube placement can be realized, and the damage to the laryngeal part of a human body can be effectively avoided.

An epiglottis support 6 is arranged on the inner side of the cover body 1. The epiglottis support 6 is used to hold up the epiglottis and prevent the intraoperative epiglottis from sagging. In the longitudinal section of the glottic cover catheter, the epiglottis support 6 is an extension of the upper wall of the tube body 2.

A distal opening 41 is provided at an end of at least one of the piriform fossa fitting portions 4, and a gastric tube passageway 7 communicating with the distal opening 41 is provided at a side portion of the tube body 2. As shown in fig. 11, in this embodiment, distal openings 41 are provided at the ends of the two pyriform fos mating parts 4, and the two gastric tube channels 7 are symmetrically distributed on two sides of the tube body 2, so as to meet the requirement of intubation of various endoscopic devices such as gastric tubes, bronchofiberscopes, and the like.

The pipe body 2 is a straight pipe or a prefabricated bent pipe in a natural state, and can be arranged into an integral structure with the cover body 1, and is integrally cast and formed through different materials, so that the flexibility of the pipe body 2 can be kept, and the outer surface of the cover body 1 can be provided with a soft medical elastic material tissue structure.

Embodiment two:

As shown in fig. 13-16, in this embodiment, the difference from the first embodiment is that the recess 5 has a rounded front end with a chamfer shape so that it can be smoothly inserted into the gap between the arytenoid cartilage and the small angle cartilage and the posterior pharyngeal wall during operation, and at the same time, an arc-shaped recess 1a1 is provided on the bottom wall of the cavity 1a, and when the recess 5 is inserted into the aforementioned gap, the arytenoid cartilage and the small angle cartilage enter the recess 1a1 so as to be able to be outwardly offset with respect to the airway, thereby avoiding blocking the air flow or the surgical placement tube. In addition, the outer side wall of the cover body 1 is provided with a thickened part 1c which is arched in an arc shape so as to compensate for the reduction of the wall thickness caused by the arrangement of the concave part at the bottom wall of the concave cavity, so that the back of the cover body can fully contact and squeeze the mucous membrane tissues of the back pharyngeal wall, and good sealing performance is maintained.

A limiting plate part 61 is arranged above the epiglottis support 6, a containing cavity 60 with an opening is formed between the limiting plate part 61 and the epiglottis support 6, when the mask body 1 is covered on the laryngeal opening, the epiglottis enters the containing cavity 60 and is limited in the containing cavity 60, so that the limiting plate part 61 is beneficial to limiting the epiglottis, and meanwhile, the end part of the limiting plate part 61 extends towards the distal direction and protrudes out of the end part of the epiglottis support 6, so that the limiting plate part 61 can reach the epiglottis valley to be clamped and limited, a stable imbedding structure is formed, and the mask body 1 is effectively prevented from shifting in the operation process; in addition, during the insertion of the mask body in the patient's throat, the retainer plate portion 61 may enter the epiglottis valley and irritate the epiglottis ligament, causing the epiglottis to open and assume a retained state.

Embodiment III:

In this embodiment, as shown in fig. 17 and 18, the distal end side of the epiglottis support 6 has a wedge-shaped guide surface 6a. The guide surface 6a provides a guide for the patient's epiglottis when the mask 1 is placed, making it easier for the epiglottis to be lifted into the upper region of the epiglottis support 6.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (10)

1. A glottic cover catheter, characterized by: comprises a cover body and a pipe body connected with the cover body; a concave cavity is formed at the inner side of the cover body, an air passage is arranged in the pipe body and communicated with the concave cavity, and a passage opening of the air passage faces the far end of the cover body; the far end of the cover body is provided with two convex pyriform nest matching parts which are mutually spaced and a concave part which is positioned between the two pyriform nest matching parts; in the longitudinal section of the glottic cover catheter, the part of the cover body from the far end to the passage opening is an extension section of the lower wall of the tube body, and the passage opening can realize direct ventilation against the glottis.

2. The glottal shield catheter according to claim 1, wherein: the pyriform fossa mating portion has a thickness greater than a thickness of the recessed portion.

3. The glottal shield catheter according to claim 2, wherein: the pyriform nest matching part protrudes out of the concave part towards the inner side of the cover body.

4. The glottal shield catheter according to claim 1, wherein: a thickened part which is arched in an arc shape is arranged on the outer side wall of the cover body; an arc-shaped concave part is arranged on the bottom wall of the concave cavity.

5. The glottic cover catheter of any one of claims 1-4 wherein: a distal opening is arranged at the end part of at least one pyriform fossa matching part, and a stomach tube channel communicated with the distal opening is arranged at the side part of the tube body.

6. The glottal shield catheter according to claim 5, wherein: the ends of the two pyriform foss matching parts are respectively provided with a far-end opening, and the two stomach tube channels are symmetrically distributed on two sides of the tube body.

7. The glottic cover catheter of any one of claims 1-4 wherein: an epiglottis support is arranged on the inner side of the cover body.

8. The glottal shield catheter according to claim 7, wherein: a limiting plate part is arranged above the epiglottis support, and an accommodating cavity with an opening is formed between the limiting plate part and the epiglottis support.

9. The glottal shield catheter according to claim 8, wherein: the end of the limiting plate part extends towards the distal direction and protrudes out of the end of the epiglottis support.

10. The glottal shield catheter according to claim 7, wherein: the distal side of the epiglottis support has a wedge-shaped guide surface.