Guided-core anti-apnea hypoxic catheter and its application

Abstract

The present invention discloses a guiding core type anti-apnea hypoxemia catheter and its application, relating to the technical field of medical devices. The catheter includes a catheter unit, a connector unit and a supporting guiding core; the catheter unit includes a hollow hose that can be used for nasopharyngeal ventilation; the connector unit includes a connector head end and a connector tail end, the connector head end is detachably connected to the aforementioned first connector, and the connector tail end is used to connect external devices; the supporting guiding core includes a second connector and a flexible soft guiding core, and the soft guiding core includes a plurality of movable joint modules connected in sequence from head to tail; during intubation, by adjusting the connection angle between the movable joint modules, the soft guiding core is formed into a curved shape matching the nasopharyngeal cavity. The present invention adjusts the steering through the soft guiding core to guide the catheter to form a matching shape, significantly reducing the incidence of nasal mucosa injury and bleeding, improving the intubation success rate, being convenient to operate and facilitating the connection of external devices.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices. Background Art

[0002] Glossoptosis refers to the symptom that the tongue drops downward and blocks the airway when the patient is in the supine position. Among them, in clinical anesthesia, glossoptosis is the most common cause of upper airway obstruction. For example, during painless gastroscopy and colonoscopy examinations, the patient needs to be anesthetized, and a certain proportion of the anesthetized patients will have glossoptosis symptoms; for another example, patients after general anesthesia are also more likely to have glossoptosis symptoms; and for another example, glossoptosis symptoms may also be caused during topical anesthesia of the oral and nasal cavities before surgery. Since the glossoptosis symptom will block the patient's airway, it is easy to cause the risk of hypoxia.

[0003] In the prior art, a nasopharyngeal airway is usually used to solve the problem of upper airway obstruction caused by glossoptosis. The nasopharyngeal airway is a soft tube similar to a tracheal catheter inserted from the human nasal cavity into the pharyngeal cavity. Its length is generally from the nasal vestibule to the front of the glottis in the pharyngeal cavity; by adjusting the insertion depth, the obstruction of the nasopharyngeal airway can be relieved, the patency of the pharyngeal cavity can be increased, and the purpose of upper airway ventilation can be achieved, thereby relieving or alleviating the poor ventilation or obstruction of the patient's upper airway. Currently, the commonly used nasopharyngeal airway in clinical practice is generally made of soft silicone or plastic materials, and is a slightly curved cylindrical tube, similar to an endotracheal tube without a balloon, but shorter, and the tube wall is thinner and softer. According to different models, the nasopharyngeal airway can have different inner diameters and lengths, and its length increases with the increase of the inner diameter. However, due to the large structural differences in the human nasal cavity, such as a small nasal cavity, nasal septum deviation, etc., when the thickness and bending arc of the nasopharyngeal airway do not match the patient's nasal cavity, it is easy to cause the risk of nasal mucosa injury and bleeding. At the same time, clinically, it often cannot be inserted once, and sometimes multiple tentative insertions are required, further increasing the degree of damage to the nasal cavity.

[0004] On the other hand, due to the thin and soft tube wall of the nasopharyngeal airway, its high flexibility results in

[0005] Poor direction control and the curved nasopharynx may cause the wall of the nasopharyngeal airway to deform or become unable to be inserted. Currently, a guide core is generally used for guidance to improve the success rate and reliability of placing the nasopharyngeal airway 1 in the nasopharyngeal cavity. For example, Chinese patent zl201822137851.7 discloses a light-guided transnasal ventilation mask, comprising: a nasopharyngeal airway adapted to the nasopharyngeal cavity and a light-guiding mechanism capable of guiding the insertion process of the nasopharyngeal airway, the light-guiding mechanism comprising a guide core with a light-emitting body at the front end, the guide core is inserted into the nasopharyngeal airway, the length of the guide core is greater than the length of the nasopharyngeal airway, and the outer diameter of the guide core is smaller than the inner diameter of the nasopharyngeal airway; when the guide core is placed in the nasopharyngeal airway, the light-emitting body and the expanded airbag are both located outside the head end of the nasopharyngeal airway, and the process of inserting the nasopharyngeal airway into the nasopharyngeal cavity is guided by the light-guiding mechanism. However, since the guide core is usually pre-shaped and has a hard texture, it may cause damage to the nasal mucosa when guiding the insertion of the nasopharyngeal airway, causing nasal mucosal loss and bleeding risks.

[0006] In summary, how to provide a core-guided anti-tongue fall hypoxia catheter that can adjust the catheter bending shape during the catheter insertion operation and reduce the incidence of nasal mucosal damage and bleeding is a technical problem that urgently needs to be solved. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a core-guided anti-tongue backward hypoxia catheter and its application. The core-guided anti-tongue backward hypoxia catheter provided by the present invention includes a supporting guide core with a soft guide core, and the soft guide core includes a plurality of movable joint modules connected end to end in sequence. During intubation, the connection angles between the movable joint modules are adjusted to allow the soft guide core to form a curved shape that matches the nasopharyngeal cavity, thereby making a steering adjustment to guide the anti-tongue backward hypoxia catheter to form a curved shape that matches the nasopharyngeal cavity passage, which can significantly reduce nasal mucosal damage and the incidence of bleeding; at the same time, it also has the advantages of easy operation, high insertion success rate, and easy connection to external devices.

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] A core-guided anti-tongue-fall hypoxia catheter comprises a catheter unit, a joint unit and a supporting core-guided catheter;

[0010] The catheter unit comprises a hollow hose that can be used for nasopharyngeal ventilation, the front end of the hollow hose is provided with an opening for ventilation or liquid, and the rear end of the hollow hose is connected to a first connector having a through-cavity;

[0011] The connector unit comprises a connector head end and a connector tail end, the connector head end and the connector tail end are connected through a through inner cavity, the connector head end is used to be detachably connected to the aforementioned first connector, and the connector tail end is used to connect to an external device;

[0012] The support guiding core includes a second joint and a flexible guiding core with flexibility. The second joint can be fixedly connected to the joint tail end of the joint unit; the flexible guiding core is arranged along the length direction of the hollow hose and can be inserted into the lumen of the hollow hose through the through lumen of the aforementioned joint unit as a support structure during the intubation of the hollow hose.

[0013] The flexible guiding core includes a plurality of movable joint modules connected end to end in sequence. The movable joint module includes a rigid fixing ring and an elastic member. The elastic member has flexibility. Adjacent movable joint modules are connected by the rigid fixing ring and the elastic member. Through the aforementioned elastic member, a flexible connecting piece is formed so that the connection angle between the movable joint modules is adjustable; during intubation, by adjusting the connection angle between the movable joint modules, the flexible guiding core forms a bending shape matching the nasopharyngeal cavity.

[0014] Furthermore, a protective end cap is arranged at the top end of the flexible guiding core; the length of the flexible guiding core is less than the length of the hollow hose. When the flexible guiding core completely enters the lumen of the hollow hose, the flexible guiding core does not reach the top end of the hollow hose to maintain the flexibility of the top end of the catheter unit during intubation.

[0015] Furthermore, the elastic member is an electroactive polymer member. The movable joint module further includes an electric excitation part corresponding to the electroactive polymer member. The electroactive polymer member can contract or expand under the electric excitation of the electric excitation part to generate asymmetric deformation, and form a bend through the aforementioned asymmetric deformation to adjust the connection angle between the movable joint modules.

[0016] Furthermore, the electroactive polymer member includes at least two electroactive polymer rods fixedly installed on the rigid fixing ring and arranged at intervals along the circumferential direction of the rigid fixing ring;

[0017] The electric excitation part includes a conductive line composed of a central control cable and branch cables. The branch cables are arranged in one-to-one correspondence with the electroactive polymer rods; the central control cable extends along the axial direction of the rigid fixing ring and is arranged concentrically with the rigid fixing ring. The central control cable can be connected to a power supply; the branch cables are arranged radially with the aforementioned central control cable as the center. One end of the branch cable is connected to the central control cable, and the other end is connected to the electroactive polymer rod through the aforementioned electrode;

[0018] Through the aforementioned central control cable, the electric signal sent from the power supply is selectively applied to the electrode connected to the branch cable, and an electric excitation is applied to the corresponding electroactive polymer rod through the electrode to cause the electroactive polymer rod to generate a contraction deformation, thereby causing the electroactive polymer member to bend towards or in the opposite direction of the electroactive polymer rod.

[0019] Further, four isomorphic electroactive polymer rods are circumferentially and uniformly arranged along the rigid fixing ring, and adjacent electroactive polymer rods are arranged at an interval of 90 degrees; each electroactive polymer rod includes a first arm and a second arm arranged at an angle α, and the angle range of the angle α is 120 degrees - 160 degrees.

[0020] Further, a switch is provided at the connection of each branch cable and the central control cable, and a switch on-off controller is provided corresponding to each switch. After obtaining the switch on-off instruction through the switch on-off controller, the corresponding switch is controlled to connect or disconnect the circuit to selectively apply an electrical excitation to one or more electroactive polymer rods in the electroactive polymer member;

[0021] Moreover, the shrinkage amount of the electroactive polymer rod to be bent is adjusted by adjusting the voltage intensity of the electrical excitation.

[0022] Further, the flexible guiding core further includes a camera module installed at the front end of the first active joint module, and an operation handle module installed at the rear end of the last active joint module;

[0023] The camera module contains a camera and a central control cable; when the camera module is installed on the first active joint module, the central control cable of the camera module can be electrically connected to the central control cable of the first active joint module;

[0024] The operation handle module includes a rigid fixing ring, a handle part and an external conducting cable. The rigid fixing ring is connected to the electroactive polymer rod of the last active joint module; when the operation handle module is installed on the last active joint module, the external conducting cable of the operation handle module can be electrically connected to the central control cable of the last active joint module;

[0025] The external conducting cable can be inserted into the cable cavity of the aforementioned second joint to electrically connect to an external control system through the external conducting cable in the second joint.

[0026] Further, corresponding to each active joint module, an interface is provided at the free end of the rigid fixing ring for fixedly connecting to the rod end of the electroactive polymer rod of the adjacent active joint module; the interface is an adhesion interface, a magnetic adsorption interface or a plug-in interface;

[0027] Moreover, corresponding to each active joint module, magnetic adsorption interfaces are provided at both ends of the central control cable for connecting to the central control cables of adjacent active joint modules, and the connected adjacent central control cables can conduct electrical signals.

[0028] Furthermore, the hollow hose is a non-bending hollow hose, and scale marks are provided on the side wall of the hollow hose; the hollow hose includes a connected opening section and a reinforced lining section, openings are provided on the tube wall of the opening section, and an elastic reinforced lining structure is provided on the tube wall of the reinforced lining section.

[0029] The present invention also provides a guide core type anti-apnea hypoxemia catheter kit, which includes the aforementioned guide core type anti-apnea hypoxemia catheter and a nasal plug; the nasal plug is sleeved on the hollow hose and can move relative to the hollow hose under an external force, the outer diameter of the nasal plug matches the size of the nostril, and the inner diameter of the nasal plug matches the outer diameter of the hollow hose so that the nasal plug can be limited after the movement is completed.

[0030] Due to the adoption of the above technical solutions, compared with the prior art, the present invention has the following advantages and positive effects by way of example:

[0031] The anti-apnea hypoxemia catheter provided by the present invention includes a support guide core with a soft guide core. The soft guide core includes a plurality of movable joint modules connected in sequence at the head and tail. During intubation, by adjusting the connection angle between the movable joint modules, the soft guide core forms a bent shape matching the nasopharyngeal cavity. In this way, through the bending of the soft guide core for steering adjustment, the anti-apnea hypoxemia catheter is guided to form a bent shape matching the nasopharyngeal cavity channel, avoiding the risk of nasal mucosa injury and bleeding caused by the inconsistent bending radian of the nasopharyngeal airway and the patient's nasopharyngeal cavity in the prior art, and significantly reducing the incidence of nasal mucosa injury and bleeding. At the same time, the hollow hose is detachably connected to the joint unit through the first joint. Openings are provided at the bottom and / or side wall of the front end of the hollow hose for ventilation or liquid passage. When the first joint is connected to the joint unit, it is connected to external devices such as syringes, ventilators, oxygen supply pipelines, etc. through the joint tail end of the joint unit. When the first joint is separated from the joint unit, it is directly connected to the ventilation pipeline such as the oxygen supply pipeline through the first joint; the support guide core includes a second joint, and the second joint is adapted to the joint tail end of the aforementioned joint unit and can be fixedly connected to the joint tail end, so it is convenient to disassemble the support guide core during the operation according to needs to connect various types of external devices.

[0032] On the other hand, the elastic member of the movable joint module is preferably an electroactive polymer member. The movable joint module further includes an electric excitation part corresponding to the electroactive polymer member, including at least two electroactive polymer rods fixedly installed on a rigid fixing ring and arranged at intervals along the circumferential direction of the rigid fixing ring. By applying different electric excitation conditions to different electroactive polymer rods to generate asymmetric contraction or expansion, the electroactive polymer member generates asymmetric deformation, and the connection angle between the movable joint modules is adjusted by the aforementioned asymmetric deformation to form a bend.

[0033] On the other hand, a guide-wire type anti-apneic hypoxic catheter kit with nasal plugs is also provided. The nasal plugs are sleeved on the hollow hose and can move relative to the hollow hose under the action of an external force. The outer diameter of the nasal plugs matches the size of the nostrils, and the inner diameter of the nasal plugs matches the outer diameter of the hollow hose so that the nasal plugs can be limited after the movement is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 FIG. is a schematic structural diagram of the guide-wire type anti-apneic hypoxic catheter and the corresponding structure provided by an embodiment of the present invention.

[0035] Figure 2 FIG. is a schematic structural diagram of the catheter unit and the opening provided by an embodiment of the present invention.

[0036] Figure 3 is Figure 1 a schematic structural diagram of the connection between the first joint and the joint unit in FIG.

[0037] Figure 4 FIG. is a schematic connection diagram of the built-in support guide wire with the catheter unit and the joint unit provided by an embodiment of the present invention.

[0038] Figure 5 is Figure 4 a schematic structural diagram of the connection between the support guide wire and the joint unit in FIG.

[0039] Figure 6 FIG. is a schematic structural diagram of the second joint provided by an embodiment of the present invention.

[0040] Figure 7 FIG. is a schematic structural diagram of the soft guide core provided by an embodiment of the present invention.

[0041] Figure 8 FIG. is a schematic exploded structural diagram of the soft guide core provided by an embodiment of the present invention.

[0042] Figure 9 FIG. is a three-dimensional structural schematic diagram of the movable joint module provided by an embodiment of the present invention Figure 1 .

[0043] Figure 10 FIG. is a three-dimensional structural schematic diagram of the movable joint module provided by an embodiment of the present invention Figure 2 .

[0044] Figures 11 to 13 FIG. is a planar structural schematic diagram of the movable joint module provided by an embodiment of the present invention.

[0045] Figure 14 FIG. is a schematic structural diagram of the hollow hose with a divided cavity provided by an embodiment of the present invention.

[0046] Figure 15Schematic diagram of the structure of the guiding-core type anti-apnea hypoxic catheter kit provided by the embodiment of the present invention.

[0047] Figure 16 Schematic diagram of the structure of the nasal plug provided by the embodiment of the present invention.

[0048] Explanation of reference numerals:

[0049] Anti-apnea hypoxic catheter 10;

[0050] Catheter unit 100, hollow hose 110, main cavity 110a, sub-cavity 110b, scale mark 111, opening 120, first joint 130, anti-slip thread 131, rotary connection structure 132, third joint 140;

[0051] Joint unit 200, joint head end 210, joint tail end 220, operation handle 230;

[0052] Support guiding core 300, second joint 310, first chamber 311, second chamber 312, thread 313, soft guiding core 320, movable joint module 321, rigid fixing ring 3211, electroactive polymer rod 3212, central control cable 3213, sub-cable 3214, camera module 322, operation handle module 323;

[0053] Nasal plug 20, nasal plug body 21, through hole 22, wing 23;

[0054] External device 30. Detailed implementation manners

[0055] The guiding-core type anti-apnea hypoxic catheter and its application disclosed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features described in the following embodiments or the combination of technical features should not be considered in isolation, and they can be combined with each other to achieve better technical effects. In the accompanying drawings of the following embodiments, the same reference numerals appearing in each drawing represent the same features or components, which can be applied to different embodiments. Therefore, once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.

[0056] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the invention can be implemented. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the invention can produce and the purposes that can be achieved, should fall within the scope covered by the technical content disclosed by the invention. The scope of the preferred embodiments of the present invention includes additional implementations, where the functions can be executed in a substantially simultaneous manner or in the reverse order according to the functions involved, rather than in the order described or discussed. This should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0057] Technologies, methods, and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific values should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. Embodiment

[0058] See Figure 1 As shown, a guiding core type anti - tongue - falling hypoxia catheter provided by this embodiment.

[0059] The anti - tongue - falling hypoxia catheter 10 includes a catheter unit 100, a joint unit 200, and a support guiding core 300.

[0060] The catheter unit 100 includes a hollow hose 110 that can be used for nasopharyngeal ventilation. The hollow hose 100 is a flexible hollow tube and can be made of flexible materials, such as flexible plastics, rubbers, silicones, resins, etc. Preferably, a medical PVC tube is used.

[0061] In this embodiment, the hollow hose 110 has a certain flexibility such that the hollow hose can be bent along the bending shape of the support guiding core 300 and can form an arc matching the nasopharyngeal cavity channel after being inserted into the nasopharyngeal cavity. The bending performance of the hollow hose is related to the flexibility of the hose. When the hose material is selected, the flexibility of the hose is related to the slenderness ratio (i.e., the ratio of length to diameter) of the hose. That is to say, the slenderness ratio of the hollow hose can be adjusted by adjusting the length and the cross - sectional diameter of the hose.

[0062] As a preferred in a typical manner, the outer diameter of the hollow hose can be 1 - 10 mm, preferably less than 4 mm; the wall thickness can be between 0.3 - 0.5 mm, preferably 0.4 mm, and the length of the hollow hose can be 50 - 500 mm, preferably 50 - 150 mm.

[0063] An opening 120 is also provided at the front end of the hollow hose 110 for ventilation or liquid passage, so that the hollow hose 110 can conduct ventilation, drain liquid, administer medicine, etc. through the opening.

[0064] See Figure 2 As shown, the opening 120 can be provided at the bottom and / or the side wall of the front end of the hollow hose 110. Preferably, at least one opening is provided at the bottom of the front end of the hollow hose, and multiple rows - by way of example and not limitation, for example, 4 rows are provided on the side wall of the front end of the hollow hose, and at least 2 openings are arranged in each row.

[0065] In this embodiment, the hollow hose is a non-bent hollow hose, and scale marks are provided on the side wall of the hollow hose for the operator to locate the relative position of the catheter unit. Preferably, the aforementioned scale marks can be set in combination with the tissue structure characteristics of the nasopharyngeal cavity so that the operator can quickly understand the position information of the hose in the nasopharyngeal cavity through the scale marks.

[0066] In this embodiment, the hollow hose 110 can be an ordinary hose or a reinforced hose. When a reinforced hose is used, an elastic reinforced lining structure can be provided on the tube wall of the hollow hose 110.

[0067] Preferably, the reinforced lining structure is not provided at the top end of the hollow hose 110 to maintain sufficient flexibility at the top end of the catheter unit during intubation. At this time, the hollow hose is divided into an opening section and a reinforced lining section, and the opening section and the reinforced lining section are connected end to end. The opening section is located at the front end of the hollow hose, and the aforementioned opening 120 is provided on the tube wall of the opening section. The reinforced lining section is located at the rear end of the opening section, and an elastic reinforced lining structure is provided on the tube wall of the reinforced lining section.

[0068] The reinforced lining structure is preferably an elastic spiral lining structure, an elastic strip lining structure or an elastic mesh lining structure. The elastic strip lining, such as a steel strip, a plastic strip, etc., and the elastic mesh lining, such as a steel mesh.

[0069] In this embodiment, it is preferably an elastic spiral lining structure. As an elastic support structure of the hollow hose, the elastic spiral lining structure can form a reinforced hose, enabling the hollow hose to have good flexibility and certain strength, with good anti-deformation ability, ensuring the smoothness of the hollow hose in the patient's airway, avoiding the airway obstruction phenomenon caused by being twisted or flattened by the patient's respiratory tract, and improving the safety of using the anti-glossoptosis and hypoxemia catheter. During specific implementation, the elastic spiral lining structure can be coated and arranged inside the tube wall of the hollow hose. During specific implementation, the elastic spiral lining structure is preferably a spiral steel wire. As an example of a typical method, the hollow hose is preferably made of polyvinyl chloride, and the spiral steel wire is preferably made of stainless steel wire with a diameter of 0.1 mm. The stainless steel is preferably medical-grade 316 stainless steel.

[0070] The rear end of the hollow hose 110 is also connected to a first joint 130 with a through lumen.

[0071] The joint unit 200 may include a joint head end and a joint tail end. The joint head end and the joint tail end are communicated through a through lumen. The joint head end is used for detachably connecting with the aforementioned first joint 130, and the joint tail end can be used for connecting external devices.

[0072] Specifically, referring to Figure 3 As shown, the joint unit 200 includes a small-diameter joint head end 210 and a large-diameter joint tail end 220. The joint head end 210 and the joint tail end 220 are communicated through a through lumen. Optionally, an operation handle 230 is provided at the connection between the joint head end 210 and the joint tail end 220 for the user to hold and operate. The inner diameter dimension of the joint head end 210 matches the outer diameter dimension of the proximal end of the first joint 130, so that the proximal end of the first joint 130 can enter the joint head end 210 to achieve fixed connection.

[0073] The joint tail end 220 may include a plurality of nested joint tubes. Specifically, at least a first joint tube and a second joint tube are included. The first joint tube is arranged inside the second joint tube and they are coaxially arranged. Through the first joint tube, a small-interface external device with a first general instrument size can be connected. The first general instrument size, for example, is suitable for the sizes of syringe joints and nasal oxygen tube joints. Through the second joint tube, a large-interface external device with a second general instrument size can be connected. Optionally, a gas supply device with a flexible interface can also be connected through the annular tube between the first joint tube and the second joint tube. As an example, for example, a flexible nasal oxygen tube joint.

[0074] The support guide core 300 includes a second joint 310 and a flexible soft guide core 320. A protective end cap may also be provided at the top end of the soft guide core 320 as a protective structure.

[0075] The second joint 310 is adapted to the joint end 220 of the foregoing joint unit 200 and can be fixedly connected to the joint end 220. See Figure 4 and 5 as shown. Specifically, the second joint 310 can be detachably and fixedly connected to the joint end 220. The detachable connection method can adopt an extrusion connection method, a frictional connection method, a rotational connection method, and / or a bayonet connection method. In this embodiment, preferably, a frictional connection method is adopted, that is, the fastening effect between the second joint 310 and the joint end 220 is achieved through friction.

[0076] See Figure 6 as shown. Specifically, the second joint 310 can include a first chamber 311 and a second chamber 312. The first chamber 311 is provided with a through inner cavity penetrating through the second joint 310. The head end of the soft guiding core 320 is installed in the first chamber 311 and penetrates through the first chamber 311, so that the interface of the external device can be connected to the soft guiding core 320. An external thread 313 is further provided on the outer surface of the second joint 310 for the user to hold and operate.

[0077] The soft guiding core 320 is arranged along the length direction of the hollow hose 110 and can be inserted into the lumen of the hollow hose 110 through the through inner cavity of the foregoing joint unit 200 as a support structure when the hollow hose is inserted. That is to say, the soft guiding core 320 can provide sufficient supporting force and anti-kinking force for the body of the hollow hose and can be used as a guiding structure and a support structure during the insertion of the hollow hose. At the same time, the soft guiding core 320 should also have flexibility so that it can deform along with the bending part of the nasopharyngeal cavity channel, which is beneficial to passing through the nasal cavity and can reduce the damage to the nasal cavity and the lateral pharyngeal wall.

[0078] Preferably, the length of the soft guiding core is less than the length of the hollow hose. When the soft guiding core completely enters the lumen of the hollow hose, the soft guiding core does not reach the top end of the hollow hose to maintain the flexibility of the top end of the catheter unit during intubation. The so-called "completely entering" means that the soft guiding core completes the operation of entering the hollow hose. Specifically, when the soft guiding core completely enters the lumen of the hollow hose, the distance between the end of the soft guiding core and the top end of the hollow hose is not less than the length of the foregoing opening section. That is to say, the insertion length of the soft guiding core in the hollow hose is adapted to the length of the reinforced lining section, so as to maintain sufficient flexibility of the top end of the catheter unit during intubation.

[0079] The soft guiding core 320 includes a plurality of movable joint modules 321 connected end to end in sequence. After being assembled and connected by the plurality of movable joint modules 321, a slender rod-shaped soft guiding core is formed. See Figure 7 as shown.

[0080] Combined Figure 8 As shown, the flexible guiding core 320 may further include a camera module 322 installed at the front end of the first active joint module 321, and an operation handle module 323 installed at the rear end of the last active joint module.

[0081] The active joint module 321 is composed of a rigid fixing ring 3211 and an elastic member. The elastic member has flexibility. Adjacent active joint modules 321 are connected by the rigid fixing ring 3211 and the elastic member. A flexible connecting member is formed by the foregoing elastic member so that the connection angle between the active joint modules is adjustable. During intubation, the connection angle between the active joint modules can be adjusted to make the flexible guiding core form a curved shape matching the cavity.

[0082] The flexible connecting member refers to a structure that can achieve flexible connection of the target object. By way of example and not limitation, such as a spring, a corrugated pipe (a tubular element formed by connecting collapsible corrugated sheets along the folding and telescoping direction), a hinge shaft and other connecting structures, or other elastic structures with desired flexibility and anti-kinking performance.

[0083] In this embodiment, preferably, the elastic member is an electroactive polymer member. At this time, the active joint module further includes an electric excitation part corresponding to the electroactive polymer member. The electroactive polymer member is a member made of electroactive polymer (EAP, Electro Active Polymer) material. The electroactive polymer can generate various forms of mechanical responses such as contraction or expansion through the change of the internal structure of the material under the action of an external electric field, that is, it can generate deformation after being electrically stimulated. According to needs, EAP can adopt a fiber bundle structure (EAP fiber bundle) or a laminated structure (formed by laminating multiple EAP layers); and various configurations, shapes or sizes are set based on the movement to be achieved, which belongs to the prior art and will not be elaborated here.

[0084] The electroactive polymer member can contract or expand under the electric excitation of the electric excitation part to generate asymmetric deformation, and form a bend through the foregoing asymmetric deformation to adjust the connection angle between the active joint modules. Preferably, to form the foregoing asymmetric deformation, the electroactive polymer member may include at least two electroactive polymer rods fixedly installed on the rigid fixing ring and arranged at intervals along the circumferential direction of the rigid fixing ring.

[0085] At this time, the electric excitation part may include a conductive line composed of a central control cable and branch cables, and the branch cables are arranged in one-to-one correspondence with the electroactive polymer rods. The central control cable extends along the axial direction of the rigid fixing ring and is arranged concentrically with the rigid fixing ring, and the central control cable can be connected to a power source. The branch cables are arranged radially with the central control cable as the center. One end of each branch cable is connected to the central control cable, and the other end is connected to the electroactive polymer rod through the aforementioned electrode. In this way, each electroactive polymer rod can be connected to the central control cable through an independent branch cable, and independent control can be achieved to avoid interference.

[0086] Specifically, there may be multiple electrodes corresponding to each electroactive polymer rod, and the multiple electrodes are connected to at least one side or at least a part of the electroactive polymer rod by embedding, adhesion or fixing. The electrodes used can be of any shape and material as long as they can provide an appropriate voltage to the electroactive polymer.

[0087] When steering adjustment is required, selective electric excitation is performed on the aforementioned multiple electroactive polymer rods so that the excited electroactive polymer rods contract or expand, driving asymmetric deformation. Specifically, an electrical signal sent from a power source is selectively applied to the electrodes connected to the branch cables through the aforementioned central control cable, and an electric excitation is applied to the corresponding electroactive polymer rod through the electrodes, causing the electroactive polymer rod to contract and deform, thereby causing the electroactive polymer component to bend in the direction of or in the opposite direction of the electroactive polymer rod. It can be known that when the electroactive polymer rod being electrically stimulated contracts, the electroactive polymer component bends in the direction of the electroactive polymer rod, and when the electroactive polymer rod being electrically stimulated expands, the electroactive polymer component bends in the opposite direction of the electroactive polymer rod.

[0088] At this time, the camera module 322 may include a camera and a central control cable. When the camera module is installed on the first movable joint module 321, the central control cable of the camera module can be electrically connected to the central control cable of the first movable joint module 321.

[0089] The operation handle module 323 may include a rigid fixing ring, a handle part, and an external conducting cable. The rigid fixing ring is connected to the electroactive polymer rods of the last movable joint module 321. When the operation handle module 323 is installed on the last movable joint module 321, the external conducting cable of the operation handle module 323 can be electrically connected to the central control cable of the last movable joint module 321.

[0090] The external conducting cable can be inserted into the first chamber (the first chamber serves as a cable chamber) of the aforementioned second joint 310. In this way, the external conducting cable in the second joint 310 can be used to electrically connect to an external control system when needed.

[0091] To achieve the rapid splicing of modules, for each active joint module, a quick interface is provided at the free end of the rigid fixing ring for rapid and fixed connection with the rod end of the electro-active polymer rod of the adjacent active joint module. Preferably, the quick interface is an adhesion interface, a magnetic adsorption interface or a plug-in interface.

[0092] In addition, for each module (including the active joint module, the camera module and the operating handle module), magnetic adsorption interfaces are provided at both ends of the central control cable for connection with the central control cables of adjacent active joint modules, and the adjacent central control cables after connection can conduct electrical signal transmission. That is, the quick connection of the central control cable unit is achieved by providing quick magnetic adsorption interfaces at both ends of the central control cable. To provide the input and output of electrical signals after connection, the magnetic adsorption interface is set as an electrical contact joint that can achieve electrical connection after connection.

[0093] In this way, signals can be transmitted through each section of the active joint module and the operating handle module, and finally connected to the external control system.

[0094] Preferably, the image information of the cavity can also be collected by the camera of the aforementioned camera module and sent to the aforementioned external control system. After obtaining the image information of the cavity, the external control system can analyze the image to obtain the three-dimensional data of the cavity, obtain the bending parameters of the cavity, and then control the bending of each section of the active joint module according to the aforementioned bending parameters to achieve the adaptive guiding control of the flexible guiding core.

[0095] Preferably, as shown in Figures 9 to 13 the electro-active polymer member includes four isomorphic electro-active polymer rods 3212 arranged circumferentially and uniformly along the rigid fixing ring, and the adjacent electro-active polymer rods 3212 are arranged at intervals of 90 degrees (corresponding to the adjustment in the front, back, left and right 4 directions respectively). A central cable 3213 is connected to the four electro-active polymer rods 3212 through branch cables 3214 in four directions, and different electrical excitation conditions can be applied to the electro-active polymer rods 3212 in four directions through the electrodes on the branch cables 3214 to obtain the final required bending direction. At the same time, the electro-active polymer rod may include a first arm and a second arm arranged at an angle α, and the angle range of the angle α is preferably 120 degrees - 160 degrees. By setting it as a V-shaped rod, the bending sensitivity can be improved.

[0096] Preferably, a switch is provided at the connection of each branch cable and the central control cable, and a switch on-off controller is provided corresponding to each switch. After obtaining the switch on-off instruction through the switch on-off controller, the corresponding switch is controlled to connect or disconnect the circuit to selectively apply electrical excitation to one or more electro-active polymer rods in the electro-active polymer member.

[0097] Preferably, when the deformation amount (shrinkage amount or expansion amount) of the electroactive polymer is related to the voltage intensity, the shrinkage amount of the electroactive polymer rod to be bent can also be adjusted by adjusting the voltage intensity of the electric excitation.

[0098] Preferably, an insulating coating is plated on the outer surface of the electroactive polymer rod as a protective structure.

[0099] In this embodiment, optionally, the hollow hose may further include a plurality of cavities. Specifically, refer to Figure 14 As shown, the hollow hose 110 may include a main cavity 110a and at least one sub-cavity 110b. The main cavity 110a and the sub-cavity 110b are isolated from each other. A third joint 140 may be provided corresponding to the sub-cavity 110b for connection to an external device.

[0100] The main cavity 110a is mainly used for nasopharyngeal ventilation. A camera and / or a carbon dioxide detection probe may be installed in the sub-cavity 110b. The camera and / or the carbon dioxide detection probe are connected to corresponding image detection devices and / or carbon dioxide detection devices through the third joint for image detection and / or carbon dioxide detection. Alternatively, the sub-cavity 110b may be used for independent liquid passage to achieve separation of the gas-liquid channels.

[0101] Refer to Figure 15 As shown, in another embodiment of the present invention, a guide core type anti-apnea and hypoxia catheter kit is provided.

[0102] The guide core type anti-apnea and hypoxia catheter kit includes the aforementioned guide core type anti-apnea and hypoxia catheter 10 and a nasal plug 20.

[0103] The anti-apnea and hypoxia catheter 10 includes a catheter unit 100, a joint unit 200, and a support guide core 300.

[0104] The nasal plug is sleeved on the hollow hose and can move relative to the hollow hose under an external force. The outer diameter of the nasal plug matches the size of the nostril, and the inner diameter of the nasal plug matches the outer diameter of the hollow hose so that the nasal plug can be limited after the movement is completed.

[0105] Refer to Figure 16 As shown, the nasal plug 20 includes a nasal plug body 21 and a through hole 22 penetrating the nasal plug body 21. Through the through hole 22, the nasal plug can be sleeved on the hollow hose 110 and can move relative to the hollow hose 110 under an external force. Preferably, the outer diameter of the nasal plug 20 matches the size of the nostril, and the inner diameter of the nasal plug 20 (i.e., the diameter of the through hole 22) matches the outer diameter of the hollow hose 110 so that the nasal plug 20 can be limited after the movement is completed. The limiting methods include, but are not limited to, extrusion limiting or frictional limiting.

[0106] The nasal plug 20 can be made of materials such as rubber, silica gel, and elastic plastic.

[0107] Preferably, the nasal plug 20 further includes a nasal plug wing piece 23 to prevent the nasal plug from falling into the patient's nasal cavity. Preferably, the nasal plug wing piece can be integrally formed with the nasal plug main body.

[0108] Other features of the anti-apnea hypoxemia catheter refer to the previous embodiments and will not be elaborated here.

[0109] Within the scope of the targeted protection of the present disclosure, the components can be selectively and operably combined in any number. Additionally, terms such as "including", "comprising", and "having" should be construed as inclusive or open by default, rather than exclusive or closed, unless explicitly defined to the contrary. All technical, scientific, or other terms conform to the meanings understood by those skilled in the art, unless defined to the contrary. Common terms found in dictionaries should not be interpreted too idealistically or too unrealistically in the context of the relevant technical documents, unless the present disclosure explicitly defines them as such. Any changes or modifications made by those of ordinary skill in the art of the present invention based on the above disclosure fall within the scope of protection of the claims.

Claims

1. A guide-core type anti-apnea low-oxygen catheter, characterized in that: It includes a catheter unit, a connector unit, and a support guide core; The catheter unit includes a non-bending hollow hose that can be used for nasopharyngeal ventilation. After being inserted into the nasopharyngeal cavity, it can form an arc matching the nasopharyngeal cavity passage. An opening for ventilation or liquid passage is provided at the front end of the hollow hose, and the rear end of the hollow hose is connected to a first connector with a through lumen; The connector unit includes a connector head end and a connector tail end that are connected through a through lumen. The connector head end is used for detachable connection with the first connector, and the connector tail end is used for connecting to an external device; The support guide core includes a second connector and a flexible soft guide core. The second connector can be fixedly connected to the connector tail end of the connector unit; the soft guide core is arranged along the length direction of the hollow hose and can be inserted into the lumen of the hollow hose for nasopharyngeal ventilation through the through lumen of the connector unit as a support structure during the intubation of the hollow hose. At this time, the end of the soft guide core does not reach the top of the hollow hose and has a certain distance to maintain the flexibility of the top end of the catheter unit during intubation; The soft guide core includes a plurality of movable joint modules connected in sequence from head to tail. The movable joint module includes a rigid fixing ring and an elastic member. The elastic member has flexibility. Adjacent movable joint modules are connected by a rigid fixing ring and an elastic member, and the rigid fixing rings are spaced apart by an elastic member. A flexible connecting member is formed by the elastic member so that the connection angle between the movable joint modules is adjustable; during intubation, the soft guide core is formed into a bent shape matching the nasopharyngeal cavity by adjusting the connection angle between the movable joint modules.

2. The guiding-core type anti-apnea hypoxemia catheter according to claim 1, wherein: A protective end cap is provided at the top end of the soft guide core; The length of the soft guide core is less than the length of the hollow hose.

3. The guiding core type anti-apnea hypoxemia catheter according to claim 1 or 2, characterized in that: The elastic member is an electroactive polymer member, and the movable joint module further includes an electrical excitation part corresponding to the electroactive polymer member. The electroactive polymer member can contract or expand under the electrical excitation of the electrical excitation part to generate asymmetric deformation, and form a bend through the aforementioned asymmetric deformation to adjust the connection angle between the movable joint modules.

4. The lead-core type anti-apnea hypoxemia catheter according to claim 3, wherein: The electroactive polymer member includes at least two electroactive polymer rods fixedly installed on the rigid fixing ring and arranged at intervals along the circumferential direction of the rigid fixing ring; The electrical excitation part includes a conductive line composed of a central control cable and branch cables. The branch cables are arranged corresponding to the electroactive polymer rods one by one; the central control cable extends along the axial direction of the rigid fixing ring and is arranged concentrically with the rigid fixing ring. The central control cable can be connected to a power source; the branch cables are arranged radially with the central control cable as the center. One end of the branch cable is connected to the central control cable, and the other end is connected to the electroactive polymer rod through an electrode; The electrical signal sent from the power source is selectively applied to the electrode connected to the branch cable through the central control cable, and an electrical excitation is applied to the corresponding electroactive polymer rod through the electrode to cause the electroactive polymer rod to generate a contraction deformation, thereby causing the electroactive polymer member to bend in the direction of or opposite to the electroactive polymer rod.

5. The guiding-core type anti-apneic hypoxemia catheter according to claim 4, wherein: Four isomorphic electroactive polymer rods are evenly arranged along the circumference of the rigid fixing ring, and adjacent electroactive polymer rods are arranged 90 degrees apart; each electroactive polymer rod includes a first arm and a second arm set at an angle α, and the angle α ranges from 120 degrees to 160 degrees.

6. The guide-core type anti-apneic hypoxic catheter according to claim 4, wherein: A switch is provided at the connection between each branch cable and the central control cable, and a switch on-off controller is provided corresponding to each switch. After the switch on-off controller obtains a switch on-off instruction, the corresponding switch is controlled to connect or disconnect the circuit to selectively apply electrical excitation to one or more electroactive polymer rods in the electroactive polymer component; And, the contraction amount of the electroactive polymer rod to be bent is adjusted by adjusting the voltage intensity of the electrical stimulation.

7. The guiding core type anti-apnea hypoxemia catheter according to claim 4 or 5 or 6, characterized in that: The soft guide core also includes a camera module installed at the front end of the first movable joint module, and an operating handle module installed at the rear end of the last movable joint module; The camera module includes a camera and a central control cable; when the camera module is installed on the first movable joint module, the central control cable of the camera module can be electrically connected to the central control cable of the first movable joint module; The operating handle module includes a rigid fixing ring, a handle portion and an external conductive cable, wherein the rigid fixing ring is connected to the electroactive polymer rod of the terminal movable joint module; when the operating handle module is mounted on the terminal movable joint module, the external conductive cable of the operating handle module can be electrically connected to the central control cable of the terminal movable joint module; The external conductive cable can be inserted into the cable cavity of the second connector to electrically connect to an external control system through the external conductive cable in the second connector.

8. The guiding-core type anti-apnea hypoxemia catheter according to claim 7, wherein: Corresponding to each movable joint module, an interface is provided at the free end of the rigid fixing ring to be fixedly connected with the rod end of the electroactive polymer rod of the adjacent movable joint module; the interface is an adhesive interface, a magnetic adsorption interface or a plug-in interface; And, corresponding to each active joint module, magnetic adsorption interfaces are provided at both ends of the central control cable to connect with the central control cable of the adjacent active joint module, and the connected adjacent central control cables can transmit electrical signals.

9. The guide-core type anti-apneic hypoxemia catheter according to claim 1, characterized in that: The side wall of the hollow hose is provided with scale marks; the hollow hose comprises a connected opening section and a reinforced lining section, the opening section has openings on its wall, and the reinforced lining section has an elastic reinforced lining structure on its wall.

10. A guiding core type anti-apnea hypoxemia catheter kit, characterized in that include: The core-guided anti-tongue fall hypoxia catheter according to any one of claims 1 to 9; and A nasal plug is sleeved on a hollow hose and can move relative to the hollow hose under the action of an external force. The outer diameter of the nasal plug matches the size of the nostrils, and the inner diameter of the nasal plug matches the outer diameter of the hollow hose so that the nasal plug can be limited after completing the movement.

Images