Laryngeal mask airway

Abstract

The utility model 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 sponge-shaped materials are filled in the mask bag. 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] This utility model relates to the field of medical device technology, and in particular to a laryngeal mask airway. Background Technology

[0002] Establishing an effective and unobstructed airway is the first essential element for ensuring the success of anesthesia, surgery, and emergency clinical care. Therefore, endotracheal intubation is a fundamental skill for anesthesiologists and clinicians. "Difficult intubation" caused by abnormal patient anatomy poses a challenge for anesthesiologists; this type of difficult intubation is medically termed "difficult airway."

[0003] By using a laryngeal mask airway (LMA), doctors can effectively expose the glottis, facilitating smoother endotracheal intubation and thus increasing the success rate of intubation and reducing intubation-related complications. Therefore, LMA products are widely welcomed by anesthesiologists and clinicians. Currently, LMAs are widely used both domestically and internationally.

[0004] Laryngeal masks are used for positive pressure ventilation in anesthesia and emergency surgery. After the laryngeal mask is inserted into the pharynx, the head laryngeal bag can tightly wrap the laryngeal opening, achieving a complete seal and establishing a short-term artificial airway to ensure smooth ventilation during surgery. At the same time, it can meet the intubation needs of endoscopic equipment such as gastric tubes and bronchoscopes.

[0005] Currently, laryngeal masks mainly come in two types: inflatable (expandable) and non-expandable (non-expandable).

[0006] Inflatable laryngeal masks are generally large in size, which can cause greater damage to patients. In addition, the amount of air to be inflated can be difficult to determine accurately for patients with different physical characteristics or different conditions, which makes it difficult for doctors to use them. Furthermore, inflatable laryngeal masks pose a risk of air leakage during use.

[0007] An airless laryngeal mask can seal the larynx without requiring secondary inflation after insertion. However, it requires that the mask pass smoothly through the mouth without obstruction from the tongue, and the depth of insertion needs to be judged. Therefore, inexperienced doctors may encounter some problems and may not be able to ensure that the mask can be inserted smoothly on the first attempt, which may affect subsequent surgeries.

[0008] In addition, existing non-inflatable laryngeal masks are usually made of elastic materials. The mask is prefabricated and inconvenient to use during insertion. Since the mask is pre-processed into a preset shape, its adaptability to the patient's cavity cannot be completely consistent. Therefore, after insertion into the human body, it may not fit the human body surface tightly or be very mismatched. Utility Model Content

[0009] The purpose of this invention is to address the technical deficiencies in the existing technology by providing a non-inflatable laryngeal mask airway that can fit closely to the patient's laryngeal inlet and reduce insertion damage to the patient.

[0010] The technical solution adopted to achieve the purpose of this utility model is:

[0011] A laryngeal mask airway includes a ventilation tube with a bladder at its distal end. The bladder is used to form an anatomically conforming fit at the laryngeal inlet of a patient and to cover the laryngeal inlet to form a seal. The bladder is filled with a sponge-like material, giving the surface of the bladder a fixed shape and deformability, allowing it to fit into the anatomical structure of the patient's laryngeal inlet.

[0012] The device includes a pressure tool connected to and communicating with the ventilation chamber of the mask inside the ventilation duct. The ventilation chamber leads to the inside of the mask, and the pressure tool provides pressure, causing the mask to deform due to the compression of the fluid pressure.

[0013] The pressure tool includes a flexible conduit, preferably equipped with a flow stop clamp or a stop valve.

[0014] The distal end of the ventilation duct is connected to the hood connector, and the hood is fixed to the hood connector.

[0015] The mask connector has a vent that is connected to the venting cavity inside the venting duct; the mask connector has a connecting surface that is connected to the mask.

[0016] The cover is bonded to the connecting surface of the cover connector.

[0017] The hood connector and the ventilation duct are each independently formed and then bonded together.

[0018] The hood connector and the ventilation duct are integrally formed.

[0019] The cover of the hood is made of polymer material.

[0020] When the sponge-like material is in a free state, the inner surface of the bladder is in contact with the surface of the filling sponge-like material, without compressing or deforming the sponge-like material. Under the action of the sponge-like material, the surface of the bladder exhibits a fixed shape structure that closely matches the anatomical structure of the patient's laryngeal inlet.

[0021] The laryngeal mask airway provided by this utility model has a fixed shape and deformability due to the sponge-like material filling its bladder. When inserted into the patient's laryngeal inlet, the sponge-like material has low insertion pressure on the patient's laryngeal surface due to its flexibility, which will not cause insertion damage to the patient's larynx. Moreover, it can restore its original shape after insertion and can fit into the anatomical structure of the patient's laryngeal inlet and seal against the outer periphery of the human laryngeal inlet, with better sealing performance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the laryngeal mask airway according to an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the explosion of the laryngeal mask airway of this utility model.

[0024] Figure 3 This is a schematic diagram of the flexible tube of the laryngeal mask airway of this utility model after it has been clamped by a flow-stopping clamp.

[0025] Figure 4 This is a first cross-sectional schematic diagram of the laryngeal mask airway of this utility model.

[0026] Figure 5 This is a second cross-sectional schematic diagram of the laryngeal mask airway of this utility model.

[0027] Figure 6 This is a third cross-sectional schematic diagram of the laryngeal mask airway of this utility model. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0029] like Figures 1 to 6 As shown in the figure, a laryngeal mask airway according to an embodiment of the present invention includes an airway tube 1, which has a distal end and a proximal end. The distal end is the end intended to be inserted into the patient, and the other end is the proximal end. The distal end of the airway tube has a bladder 3, which is used to form an anatomically conforming close fit at the patient's laryngeal inlet and to cover the patient's laryngeal inlet to form a seal. The bladder is filled with a sponge-like material 30, which gives the surface of the bladder a fixed shape and allows it to deform, so that the bladder can fit into the anatomical structure of the patient's laryngeal inlet. The sponge-like material 30 is filled into a corresponding bladder body 31 to form the bladder 3.

[0030] Because its bladder is filled with a sponge-like material, the surface of the bladder has a fixed shape and can be compressed and deformed. When inserted into the patient's larynx, the sponge-like material has a flexible nature, resulting in low insertion pressure on the patient's larynx surface and preventing insertion damage. Furthermore, the sponge-like material can restore its original fixed shape after insertion, fitting into the anatomical structure of the patient's larynx and sealing against the outer periphery of the larynx, with better sealing performance.

[0031] In one embodiment, the sponge-like material can be a slow-rebound artificial sponge with slow-rebound mechanical properties, such as polyether polyurethane sponge, memory foam, or similar sponge materials. The sponge-like material has excellent flexibility, and when the bladder filled with it is inserted into the patient's larynx, the insertion pressure on the patient is very small, almost negligible, and will not cause any insertion damage to the patient. Moreover, the sponge-like material can automatically restore its fixed shape without pressure, and can fit into the anatomical structure of the patient's larynx entrance and make a sealing contact with the outer periphery of the human larynx entrance to form a sealed connection.

[0032] In a more preferred embodiment, a pressure tool is provided, which is connected and communicates with the ventilator 1 inside the ventilator 1, the ventilator opening into and communicating with the inside of the ventilator. The pressure tool is used to provide negative pressure, causing the ventilator to deform due to fluid pressure. Specifically, the pressure tool is used to compress and deform the ventilator by drawing in gas, utilizing air fluid. Figure 3 As shown, this allows for easier insertion into the patient's throat during the procedure, without compressing the surrounding tissues and thus minimizing the risk of insertion damage.

[0033] It should be noted that in this embodiment, the setting of the pressure tool is not mandatory and can be selected as needed, with the provision of the pressure tool being preferred.

[0034] Preferably, in the embodiments of this application, the selected pressure tool includes a flexible conduit 6, such as a flexible plastic tube, with a connector 7 at its end for easy connection to a suction tool. More preferably, for ease of control, the flexible conduit is connected to a flow stop clamp 5 or a stopcock valve. The flow stop clamp can be any available flow stop clamp found on existing medical catheters.

[0035] When the pressure tool is used to compress and deform the bladder, the suction tool, such as a syringe, can be connected to the end of the flexible conduit via connector 7. After the flow stop clamp 5 or the stop valve is opened, connecting the suction tool allows the bladder to be compressed and deformed by fluid pressure. Figure 3As shown, the flow stop clamp 5 or the stop valve can then be closed to compress the flexible tube and prevent air leakage, keeping the mask in a compressed and deformed state. At this point, the insertion operation can be performed, inserting the laryngeal mask airway into the patient's mouth and into the predetermined position. After observing that it has entered the predetermined position, the flow stop clamp 5 or the stop valve is opened, and the normal atmospheric pressure of the external environment enters the mask through the flexible tube. Under the action of fluid pressure without negative pressure, the mask automatically returns to its original shape due to its own elastic function or properties. Utilizing its fixed shape that seals with the anatomical structure of the patient's laryngeal inlet, it is joined to the anatomical structure of the patient's laryngeal inlet to form a seal.

[0036] In some embodiments, the distal end of the ventilation conduit 1 is connected to a mask connector 2, and the mask 3 is fixed to the mask connector 2. The mask connector 2 has a vent 22, which connects to and communicates with the ventilation cavity 11 inside the ventilation conduit 1. The mask connector 2 also has a connecting surface 21 for connecting to the mask 3, and the vent 22 is located inside the connecting surface 21. Figure 4 As shown. In a preferred embodiment, the cover 3 is adhered to the connecting surface 21 of the cover connector 2, which can be fixed by adhesive or other methods.

[0037] In the above-described embodiments, the diaphragm connector 2 and the ventilation duct 1 are integrally formed. Alternatively, the diaphragm connector 2 and the ventilation duct 1 can be independently formed and then bonded together, or they can be connected by forming convenient insertion structures on the connection sides of the independently formed diaphragm connector 2 and the ventilation duct 1.

[0038] In the embodiments of this application, the cover 31 of the bladder used to enclose the sponge-like material is preferably made of a polymer material so that it will not leak air when a suction tool is used, thus affecting the compression and deformation effect of the sponge-like material by suction. If it is made of medical polymer material, it is soft and has a smooth outer surface to avoid damage to surrounding tissues when inserted into the patient's throat. For example, the Shore hardness should be less than 40, between 0 and 20, and more preferably between 4 and 12.

[0039] It should be noted that, in the embodiments of this application, the sponge-like material can be pre-processed into a predetermined fixed shape, particularly its surface that needs to contact the patient's laryngeal opening. This fixed shape allows for a sealed contact with the patient's laryngeal opening. In its free state, the surface of the cap can present or exhibit a fixed shape structure that closely conforms to the anatomical structure of the patient's laryngeal opening, such as... Figure 1As shown, after the cover of the bladder is filled with the sponge-like material, its inner surface is in contact with the surface of the filled sponge-like material, but it will not squeeze the sponge-like material, causing the sponge-like material to deform or compress.

[0040] It should be noted that the shape and size of the diaphragm can be specifically selected or designed according to the structure of the human body and the physiological and anatomical structure of people of different ages. Its shape is not limited to the shape or structure shown in the drawings of this application. The shapes in the drawings of this application are only for illustrative purposes.

[0041] In the embodiments of this application, the proximal end of the ventilation duct 1 is connected to a gas source connector 4, which can realize the function of connecting with a gas source device to achieve ventilation.

[0042] The laryngeal mask airway provided in this embodiment of the invention has a fixed shape and is compressible due to the sponge-like material filling its bladder. When inserted into the patient's laryngeal inlet, the sponge-like material has a flexible characteristic, resulting in low insertion pressure on the patient's laryngeal surface and preventing insertion damage. Furthermore, it can automatically recover its original shape after insertion, fitting into the anatomical structure of the patient's laryngeal inlet and sealing against the outer periphery of the laryngeal inlet, with better sealing performance.

[0043] In some embodiments, the interior of the laryngeal mask airway is further provided with a drainage cavity 14, which extends from the proximal end of the ventilation tube 1 to the drainage hole at the distal end of the mask connector. This drainage hole can be connected to a separate drainage tube, so that after the laryngeal mask is inserted, it can be connected to the human esophagus through the drainage tube. This allows drainage operations, such as inserting a drainage tube to aspirate gastric juice or secretions, to be performed while establishing the airway.

[0044] In some embodiments, a negative pressure chamber 12 is also provided inside the laryngeal mask airway, which is connected from the proximal end of the ventilation tube 1 to the negative pressure hole at the distal end of the mask connector. The negative pressure chamber 12 and the drainage chamber 14 form a loop, which is connected to the external atmospheric pressure to facilitate drainage.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and it is therefore intended to include all changes falling within the meaning and scope of the equivalents of the claims within this utility model.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider 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. A laryngeal mask airway comprising an airway tube having a distal end with a mask cuff for forming an anatomically conforming seal at the laryngeal inlet of a patient and covering the laryngeal inlet to form a seal, characterised in that, The bladder is filled with a sponge-like material, giving the surface of the bladder a fixed shape and allowing it to deform and fit into the anatomical structure of the patient's laryngeal inlet.

2. The laryngeal mask airway of claim 1, wherein, A pressure tool is provided, which is connected and communicates with the ventilation chamber of the mask inside the ventilation duct. The ventilation chamber of the mask leads to the inside of the mask. Pressure is provided by the pressure tool, causing the mask to deform due to the compression of fluid pressure.

3. The laryngeal mask airway of claim 2, wherein, The pressure tool includes a flexible conduit, on which a flow stop clamp or a stop valve is provided.

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

5. The laryngeal mask airway of claim 4, wherein, The mask connector has a vent that is connected to and communicates with the venting cavity inside the venting duct; the mask connector has a connecting surface that connects to the mask.

6. The laryngeal mask airway of claim 5, wherein, The hood is bonded to the connecting surface of the hood connector.

7. The laryngeal mask airway of claim 4, wherein, The hood connector and the ventilation duct are each molded independently and then bonded together.

8. The laryngeal mask airway of claim 4, wherein, The hood connector and the ventilation duct are integrally formed.

9. The laryngeal mask airway of claim 1, wherein, The cover of the diaphragm is made of polymer material.

10. The laryngeal mask airway of claim 1, wherein, When the sponge-like material is in a free state, the inner surface of the bladder is in contact with the surface of the filling sponge-like material, without compressing or deforming the sponge-like material. Under the action of the sponge-like material, the surface of the bladder exhibits a fixed shape structure that closely matches the anatomical structure of the patient's laryngeal inlet.

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