Laryngeal mask airway

Abstract

The invention discloses a laryngeal mask airway which comprises a ventilation catheter, the far end of the ventilation catheter is provided with a mask bag, the mask bag is used for forming tight connection conforming to an anatomical structure at the laryngeal entrance of a patient and covering the laryngeal entrance of the patient to form sealing, and the mask bag is filled with a sponge-shaped material. The surface of the mask bag has a fixed shape and is deformable, and the mask bag can be jointed on the anatomical structure of the laryngeal entrance part of a patient. The sponge-shaped material is filled in the mask bag, so that when the mask bag is inserted into the throat position of a patient, the insertion contact pressure with the throat surface of the patient is small, insertion damage to the throat of the patient is avoided, and the mask bag can automatically recover to the original shape after being inserted, can be jointed on an anatomical structure of the throat inlet part of the patient and is in sealing contact with the peripheral side of the throat of the human body; and the sealing performance is better.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a laryngeal mask airway. Background Art

[0002] Establishing an effective and unobstructed airway is the first element to ensure anesthesia surgery and clinical first aid. Therefore, tracheal intubation is a basic skill for anesthesiologists and clinicians. "Difficult intubation" caused by abnormal patient anatomical structures troubles anesthesiologists, and this kind of difficult intubation is generally referred to as "difficult airway" in medicine.

[0003] By using a laryngeal mask, doctors can effectively expose the glottis, making tracheal intubation proceed more smoothly, thereby increasing the success rate of intubation and reducing complications caused by intubation. Therefore, laryngeal mask products are widely welcomed by anesthesiologists and clinicians. Currently, laryngeal masks have been widely popularized and used at home and abroad.

[0004] The laryngeal mask is used for positive pressure ventilation in anesthesia and emergency surgeries; after the laryngeal mask product is inserted into the throat position, the head laryngeal sac can tightly wrap the laryngeal orifice, achieving complete sealing of the laryngeal orifice, establishing a short-term artificial airway to ensure smooth ventilation during the operation; at the same time, it can meet the intubation requirements of endoscopic devices such as gastric tubes and fiber bronchoscopes.

[0005] Existing laryngeal masks mainly include two types: inflatable (expansion type) and non-inflatable (non-expansion type): Inflatable laryngeal masks are generally larger in size and cause greater damage to patients; in addition, for patients with different physical characteristics or in different disease conditions, it is not easy to accurately determine the inflation volume when using a laryngeal mask, which brings certain difficulties to doctors; at the same time, there is a risk of air leakage when using an inflatable laryngeal mask.

[0006] The non-inflatable laryngeal mask can achieve wrapping and sealing of the laryngeal orifice without the need for secondary inflation after insertion, but it requires smooth passage through the oral cavity during insertion, without obstruction of the tongue, and a certain judgment of the insertion depth. Therefore, there are some problems for inexperienced doctors, and it cannot ensure that the laryngeal mask can be inserted smoothly at one time, affecting the subsequent surgery.

[0007] In addition, existing non-inflatable laryngeal masks usually use elastic materials to make their mask bodies. The mask bodies are pre-made, which is inconvenient to use during the insertion process. Moreover, since the mask bodies are pre-processed into a preset shape, their adaptability to the patient's body cavity cannot be completely consistent. Therefore, after being inserted into the human body, there may be incomplete tightness or poor matching with the human surface. Summary of the Invention

[0008] The purpose of the present invention is to provide a non-inflatable laryngeal mask airway that can closely cooperate with the laryngeal inlet part of a patient and reduce the insertion damage to the patient in view of the technical defects existing in the prior art.

[0009] The technical solution adopted to achieve the purpose of the present invention is as follows: A laryngeal mask airway includes a ventilation catheter. The distal end of the ventilation catheter has a cuff. The cuff is used to form a close contact conforming to the anatomical structure at the laryngeal inlet of the patient and cover the laryngeal inlet of the patient to form a seal. The cuff is filled with a sponge-shaped material, so that the surface of the cuff has a fixed shape and is deformable, and can be engaged with the anatomical structure at the laryngeal inlet of the patient.

[0010] Among them, a pressure tool is provided. The pressure tool is connected and communicated with the cuff ventilation cavity inside the ventilation catheter. The cuff ventilation cavity leads to the inside of the cuff. By providing pressure through the pressure tool, the cuff is deformed due to fluid pressure and compressed.

[0011] Among them, the pressure tool includes a flexible catheter. Preferably, a stopcock or a stop valve is provided on the flexible catheter.

[0012] Among them, the distal end of the ventilation catheter is connected to a cuff connector, and the cuff is fixed to the cuff connector.

[0013] Among them, the cuff connector has a ventilation port, which is communicated with the ventilation cavity inside the ventilation catheter after connection; the cuff connector has a connection surface connected to the cuff.

[0014] Among them, the cuff is adhered to the connection surface of the cuff connector.

[0015] Among them, the cuff connector and the ventilation catheter are adhesively bonded together after being independently molded.

[0016] Among them, the cuff connector and the ventilation catheter are of an integrally formed structure.

[0017] Among them, the cuff body of the cuff is made of a polymer material.

[0018] Among them, when the sponge-shaped material is in a free state, the inner surface of the cuff is in contact with the surface of the filled sponge-shaped material, and does not form extrusion on the sponge-shaped material to cause the sponge-shaped material to deform or be compressed. Under the action of the sponge-shaped material, the surface of the cuff shows a fixed shape structure that is closely fitted with the anatomical structure at the laryngeal inlet of the patient.

[0019] The laryngeal mask airway provided by the present invention has a sponge-like material filled in its mask bladder, making the surface of the mask bladder have a fixed shape and be deformable. When inserted into the laryngeal orifice position of a patient, due to the flexible characteristics of the sponge-like material, the insertion contact pressure with the surface of the patient's larynx is small, and it will not cause insertion damage to the patient's larynx. Moreover, it can automatically recover its original shape after insertion, can be joined to the anatomical structure at the laryngeal inlet part of the patient and make a sealing contact with the outer periphery of the human laryngeal orifice, and has better sealing performance. Brief Description of the Drawings

[0020] Figure 1 is a schematic diagram of the laryngeal mask airway according to an embodiment of the present invention.

[0021] Figure 2 is an exploded schematic view of the laryngeal mask airway of the present invention.

[0022] Figure 3 is a schematic diagram of the flexible catheter of the laryngeal mask airway of the present invention after being clamped by a flow stop clip.

[0023] Figure 4 is a first cross-sectional schematic view of the laryngeal mask airway of the present invention.

[0024] Figure 5 is a second cross-sectional schematic view of the laryngeal mask airway of the present invention.

[0025] Figure 6 is a third cross-sectional schematic view of the laryngeal mask airway of the present invention. Detailed Description of the Invention

[0026] The following further describes the present invention in detail with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] As Figures 1 to 6 shown, a laryngeal mask airway according to an embodiment of the present invention includes a ventilation catheter 1. The ventilation catheter has a distal end and a proximal end. The distal end is the end expected to be inserted into a patient, and the other end is the proximal end. Among them, the distal end of the ventilation catheter has a mask bladder 3. The mask bladder 3 is used to form a close contact conforming to the anatomical structure at the laryngeal inlet part of the patient and cover the laryngeal inlet of the patient to form a seal. The mask bladder is filled with a sponge-like material 30. The sponge-like material 30 makes the surface of the mask bladder have a fixed shape and be deformable, enabling the mask bladder to be joined to the anatomical structure at the laryngeal inlet part of the patient. The sponge-like material 30 is filled in a corresponding mask body 31 to form the mask bladder 3.

[0028] Since the cover sac is filled with sponge-shaped material, the surface of the cover sac has a fixed shape and can be compressed and deformed. When inserted into the laryngeal orifice of a patient, due to the flexible characteristics of the sponge-shaped material, the insertion contact pressure with the surface of the patient's larynx is small, and it will not cause insertion damage to the patient's larynx. Moreover, the sponge-shaped material can self-recover its original fixed shape after insertion, can be joined to the anatomical structure at the laryngeal inlet of the patient and make a sealed contact with the outer periphery of the human laryngeal orifice, and has better sealing performance.

[0029] In one embodiment, the sponge-shaped material can be a slow-rebound artificial sponge with slow-rebound mechanical properties, such as a polyether-type polyurethane sponge or a memory sponge or a similar sponge material. The sponge-shaped material has good flexibility. When the cover sac filled with it is inserted into the laryngeal orifice of a patient, the insertion pressure on the patient is very small, almost negligible, and it will not cause any insertion damage to the patient. Moreover, the sponge-shaped material can self-recover its fixed shape without pressure, can be joined to the anatomical structure at the laryngeal inlet of the patient and make a sealed contact with the outer periphery of the human laryngeal orifice, forming a sealed connection.

[0030] In a more preferred embodiment, a pressure tool is provided. The pressure tool is connected and communicated with the cover sac ventilation cavity 13 inside the ventilation catheter 1. The cover sac ventilation cavity leads to the inside of the cover sac and is communicated with the inside of the cover sac. The pressure tool is used to provide negative pressure to make the cover sac deformed by being compressed due to fluid pressure. Specifically, the pressure tool is used to suck gas and use air fluid to compress and deform the cover sac, as Figure 3 shown, so that when operating and inserting, it can be inserted into the laryngeal orifice of the patient in a more relaxed manner, will not form extrusion with the surrounding tissues of the patient's laryngeal orifice, and can more effectively avoid insertion damage to the patient.

[0031] It should be noted that in the embodiments of the present application, the setting of the pressure tool is not necessary and can be selected according to needs. Preferably, the pressure tool is provided.

[0032] Preferably, in the embodiments of the present application, the selected pressure tool includes a flexible catheter 6, such as a flexible plastic tube, and its end is connected to a connector 7 for facilitating the connection of a suction tool. More preferably, for convenient control and use, the flexible catheter is connected with a stop clamp 5 or a stopcock valve. The stop clamp can be realized by using an available stop clamp on an existing medical catheter.

[0033] When performing the operation of compressing and deforming the cover sac by sucking through the pressure tool, a suction tool can be connected to the end of the flexible catheter through the connector 7. The suction tool is a tool such as a syringe. After the stop clamp 5 or the stopcock valve is opened, connecting the suction tool can realize that the cover sac is compressed and deformed due to fluid pressure, as Figure 3As shown, afterwards, the stopcock clip 5 or the stopcock valve can be closed, and the flexible catheter can be tightened to prevent air leakage, so that the mask is kept in a compressed and deformed state. At this time, the insertion operation can be carried out. The laryngeal mask airway is inserted into the patient's oral cavity and reaches the predetermined position. After observing that it has reached the predetermined position, the stopcock clip 5 or the stopcock valve is opened. The normal atmospheric pressure gas in the external environment enters the mask through the flexible catheter. Under the action of the fluid pressure without the formation of negative pressure, the mask automatically returns to its original state due to its own elastic function or property, and uses its fixed shape that is hermetically fitted with the anatomical structure of the patient's laryngeal inlet part to engage with the anatomical structure of the patient's laryngeal inlet part to form a seal.

[0034] In some embodiments, the distal end of the ventilation catheter 1 is connected to the mask connector 2, and the mask 3 is fixed to the mask connector 2. Among them, the mask connector 2 has a ventilation port 22, which is connected to the ventilation cavity 11 inside the ventilation catheter 1 and is in communication with the ventilation cavity 11 inside the ventilation catheter 1. And the mask connector 2 has a connection surface 21 for connecting with the mask 3, and the ventilation port 22 is located inside the connection surface 21, as Figure 4 shown. A preferred embodiment is that the mask 3 is bonded to the connection surface 21 of the mask connector 2, and it can be bonded by glue or other means.

[0035] In the above embodiment, the mask connector 2 and the ventilation catheter 1 are integrally formed structures. Of course, the mask connector 2 and the ventilation catheter 1 can also be independently formed and then bonded together, or convenient insertion structures are respectively formed on the connection sides of the independently formed mask connector 2 and the ventilation catheter 1 and then inserted and connected.

[0036] In the embodiments of the present application, the mask body 31 of the mask for wrapping the sponge-shaped material is preferably made of a polymer material, and it will not leak air when being sucked by a suction tool, which will affect the compression and deformation effect of the sponge-shaped material by suction. For example, it is made of a medical polymer material, with a soft texture and a smooth outer surface, so as to avoid damaging the surrounding tissues when inserted into the patient's laryngeal orifice. For example, the Shore hardness should be less than 40, and it is more suitable to be between 0-20, and more preferably to select the Shore hardness between 4-12.

[0037] It should be noted that in the embodiments of the present application, the sponge-shaped material can be pre-processed into a predetermined fixed shape, especially the surface that needs to contact the patient's laryngeal orifice part is a fixed shape that can form a sealed contact with the patient's laryngeal orifice part. When it is in a free state, it can make the surface of the mask present or show a fixed shape structure that is closely fitted with the anatomical structure of the patient's laryngeal inlet part, as Figure 1As shown, after the sponge-shaped material is filled into the cover body of the cover sac, the inner surface thereof comes into contact with the surface of the filled sponge-shaped material, but does not form extrusion on the sponge-shaped material to cause deformation or compression of the sponge-shaped material.

[0038] It should be noted that the shape, size, etc. of the cover sac can be specifically selected, determined or designed according to the structure of the human body and the physiological and anatomical structures of people of different ages. Its shape is not limited to the shape or structure in the accompanying drawings of the specification of this application, and the shape of the accompanying drawings of this application only has an exemplary effect.

[0039] In the embodiment of the present application, a gas source connector 4 is connected to the proximal end of the ventilation catheter 1, and the function of connecting to a gas source device to achieve ventilation can be realized.

[0040] The laryngeal mask airway provided by the embodiment of the present invention, because the cover sac is filled with a sponge-shaped material, makes the surface of the cover sac have a fixed shape and can be compressed and deformed. When inserted into the laryngeal orifice position of a patient, due to the flexible characteristics of the sponge-shaped material, the insertion contact pressure with the surface of the patient's larynx is small, and it will not cause insertion damage to the patient's larynx. And after insertion, it can automatically return to its original shape, can be joined to the anatomical structure at the laryngeal inlet part of the patient and make a sealed contact with the outer peripheral side of the human laryngeal orifice, and the sealing performance is better.

[0041] In some embodiments, a drainage cavity 14 is further provided inside the laryngeal mask airway. The drainage hole leading from the proximal end of the ventilation catheter 1 to the distal end of the cover sac connector can be used to connect to a separately provided drainage tube through the drainage hole. In this way, after the laryngeal mask is placed, it can be connected to the human esophagus through the drainage tube, so that drainage operations such as inserting a drainage tube to suck out gastric juice or secretions can be carried out while establishing a ventilation airway.

[0042] In some embodiments, a negative pressure cavity 12 is further provided inside the laryngeal mask airway. The negative pressure hole leading from the proximal end of the ventilation catheter 1 to the distal end of the cover sac connector. The negative pressure cavity 12 and the drainage cavity 14 form a loop and are connected to the outside atmospheric pressure to facilitate drainage.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

[0044] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Laryngeal mask airway, comprising a ventilation catheter, the distal end of the ventilation catheter having a cuff, the cuff being adapted to form a close anatomical fit at the laryngeal inlet of a patient and covering the laryngeal inlet of the patient to form a seal, characterized in that, The hood is filled with a sponge-like material, so that the surface of the hood has a fixed shape and is deformable, and can be engaged with the anatomical structure at the laryngeal inlet of the patient.

2. The laryngeal mask airway according to claim 1, characterized in that, A pressure tool is provided, and the pressure tool is connected and communicated with the hood ventilation cavity inside the ventilation catheter. The hood ventilation cavity leads to the inside of the hood. By providing pressure through the pressure tool, the hood is deformed due to fluid pressure and compressed.

3. The laryngeal mask airway according to claim 2, wherein, The pressure tool includes a flexible catheter. Preferably, a stopcock or a stop valve is provided on the flexible catheter.

4. The laryngeal mask airway according to claim 1, wherein The distal end of the ventilation catheter is connected to a hood connector, and the hood is fixed to the hood connector.

5. The laryngeal mask airway according to claim 4, wherein, The hood connector has a ventilation port, which is connected and communicated with the ventilation cavity inside the ventilation catheter; the hood connector has a connection surface connected to the hood.

6. The laryngeal mask airway according to claim 5, characterized in that, The hood is adhered to the connection surface of the hood connector.

7. The laryngeal mask airway according to claim 4, wherein The hood connector and the ventilation catheter are adhesively bonded together after being independently formed.

8. The laryngeal mask airway according to claim 4, wherein The hood connector and the ventilation catheter are of an integrally formed structure.

9. The laryngeal mask airway according to claim 1, characterized in that, The hood body of the hood is made of a polymer material.

10. The laryngeal mask airway according to claim 1, characterized in that, When the sponge-like material is in a free state, the inner surface of the hood is in contact with the surface of the filled sponge-like material, and does not form extrusion on the sponge-like material to cause the sponge-like material to deform or be compressed. Under the action of the sponge-like material, the surface of the hood shows a fixed shape structure that is closely fitted with the anatomical structure at the laryngeal inlet of the patient.

Images