A catheter for use based on bronchoscopy and a mode of use thereof

Abstract

The application discloses a catheter based on bronchoscopy and a use mode thereof, and relates to the technical field of medical devices. The catheter based on bronchoscopy comprises a sheath tube, a dilating tube, a puncture needle and a balloon. One end of the sheath tube is provided with a sheath handle, and the balloon is arranged outside the sheath tube. The inside of the sheath tube is provided with a working channel and a ventilation channel, and the ventilation channel forms an opening on the sheath handle. One end of the dilating tube is provided with a dilating handle. The inside of the dilating tube is provided with a cavity. One end of the puncture needle is a puncture part, and the other end is provided with a puncture handle. After the puncture needle is arranged in the cavity, the puncture handle is located on one side of the dilating tube close to the dilating handle. The application can simultaneously meet the use requirements of puncture, dilation, biopsy and occlusion, simplifies the operation steps, reduces the operation difficulty, and effectively reduces the probability of tissue damage of a patient.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and in particular to a catheter used with a bronchoscope and its usage. Background Technology

[0002] Clinically, in pulmonary interventional surgery, puncture and sampling of the lungs and bronchi are required both before and during the procedure. Current techniques typically utilize the bronchoscopic forceps channel. However, the diameter of existing endoscopes is generally 2.5 mm or larger, limiting their reach to the main trachea. Furthermore, to reach the middle and upper lobes or lower lobes for sampling, bare biopsy forceps must be repeatedly inserted into the tissue for batch sampling. This repeated friction during sampling can damage the tissue and lead to further infection. Additionally, to sample distal suspicious tissue, a puncture needle must be re-entered through the bronchoscopic forceps channel, adding extra tools and again posing a risk of tissue damage.

[0003] Furthermore, in the field of treatment, if symptoms such as lesions or bleeding occur in the distal bronchi, ablation or occlusion treatment tools are required. Existing ablation treatment equipment can be used to treat the lungs through the bronchoscopy channel. During this process, the bronchoscopy channel can protect the main bronchus of the lungs, but the distal part cannot be protected, which can easily cause tissue damage.

[0004] Furthermore, in actual clinical practice, puncture, dilation, biopsy, and ablation treatments are often accompanied by complications such as bleeding. In such cases, all treatment tools need to be removed, and then a occlusion balloon is used through the bronchoscopic forceps channel for occlusion treatment. In the current technology, although the sheath has the function of protecting tissues in the above treatment process, due to the limitations of the current technology, after adding a balloon to the sheath, its outer diameter will be larger than the inner diameter of the forceps channel, making it impossible for the balloon to pass through the forceps channel. If the outer diameter of the sheath is reduced, the internal space of the sheath cannot pass through the smallest ablation device on the market.

[0005] Therefore, existing catheters cannot combine the functions of puncture, dilation, biopsy, and occlusion, resulting in frequent additional and replacement of tools, which leads to complicated surgical procedures, increased surgical difficulty, and increased patient suffering. Summary of the Invention

[0006] This application provides a catheter for use with a bronchoscope and its usage method, which can simultaneously meet the needs of puncture, dilation, biopsy, and occlusion, simplifying surgical procedures, reducing surgical difficulty, and effectively reducing the probability of tissue damage to patients.

[0007] On the one hand, this application provides a catheter for use with a bronchoscope, employing the following technical solution: A catheter for use with a bronchoscope includes a sheath, a dilator, a puncture needle, and a balloon. One end of the sheath extends outward to have a sheath handle, the balloon is disposed on the outside of the other end of the sheath, and the sheath has a reduced diameter structure at both ends of the balloon; the interior of the sheath has a working channel for the dilator to pass through and a ventilation channel communicating with the interior of the balloon, and the end of the ventilation channel away from the balloon forms an opening on the sheath handle; One end of the expansion tube has an expansion handle, and after the other end of the tube is inserted into the working channel, the expansion handle is located on the side of the sheath tube closer to the sheath handle, and the end of the expansion tube away from the expansion handle extends out of the sheath tube. The dilator has a cavity inside for the puncture needle to pass through. One end of the puncture needle is a puncture part and the other end is a puncture handle. After the puncture needle is inserted into the cavity, the puncture handle is located on the side of the dilator closer to the dilator handle, and the puncture part is close to the end of the dilator away from the dilator handle.

[0008] By adopting the above technical solutions, medical personnel can conveniently perform actual clinical operations such as biopsy, ablation, occlusion, dilation, puncture, and fluid injection through bronchoscopy in one procedure during lung intervention surgery, according to clinical needs. This simplifies surgical steps, reduces surgical difficulty, and effectively reduces the probability of tissue damage to patients.

[0009] Optionally, the puncture handle is used to control the puncture part to enter and exit the cavity, and the puncture part is normally located in the cavity.

[0010] By adopting the above technical solutions, the probability of damaging patient tissues during the puncture needle installation process can be reduced, making it easier for medical personnel to complete the puncture operation according to clinical needs.

[0011] Optionally, the puncture handle includes a handpiece, several threaded parts, and connectors; The connector is located on one side of the expansion handle and connected to the expansion handle. Several threaded parts are provided on the handpiece, and the threaded parts are used to engage with the outer thread of the connector. The handpiece is movably installed on the end of the puncture needle away from the puncture part. The handpiece is used to rotate and move relative to the puncture needle. Its rotation axis coincides with its own axis and the axis of the puncture needle, and its direction of movement is parallel to its axis.

[0012] By adopting the above technical solution, medical personnel can easily perform step-by-step puncture operations through the threaded engagement of the threaded parts and connectors, reducing the probability of medical personnel accidentally touching the puncture handle and causing incorrect puncture of tissue, thus further reducing the difficulty of the operation.

[0013] Optionally, the puncture handle may further include several control components and several elastic components; The threaded component is movably connected to the handheld component, and its direction of movement is perpendicular to the axial direction of the handheld component; the control component is movably connected to the handheld component, and its direction of movement is perpendicular to both the axial direction of the handheld component and the direction of movement of the threaded component; the elastic component is disposed inside the handheld component and is simultaneously connected to several threaded components and several control components; the elastic component has a tendency to drive the threaded component inward to a state for engaging with the outer thread of the connector, while at this time the control component moves outward to its limit position.

[0014] By adopting the above technical solution, medical personnel can easily change the way the handheld device controls the movement of the puncture site through the control device, thereby making it convenient for medical personnel to control the puncture target to perform tissue puncture and sampling at an appropriate speed according to clinical needs.

[0015] Optionally, the puncture handle may further include a limiting member; The limiting member is sleeved on the connecting member and threadedly engaged with the connecting member, and the limiting member is located on the side of the handpiece closer to the puncture part.

[0016] By adopting the above technical solution, medical personnel can easily control the puncture distance of the puncture needle during tissue puncture according to clinical needs, thereby effectively reducing the probability of tissue damage caused by excessive puncture and further reducing the difficulty of the operation.

[0017] Optionally, the puncture handle further includes a plurality of first magnets and a plurality of second magnets; A plurality of first magnets are disposed on the limiting member, and a plurality of second magnets are disposed on the handheld member, wherein the first magnets and the second magnets repel each other.

[0018] By adopting the above technical solution, the repulsion between the first magnet and the second magnet can effectively suppress the speed at which medical personnel control the puncture needle to puncture the tissue, thereby enabling stable and reliable operation of step-by-step puncture by the puncture needle. Furthermore, after the puncture is completed, medical personnel can easily control the handpiece to reset by means of the magnetic repulsion force.

[0019] Optionally, the outer side of the handpiece has multiple anti-slip protrusions.

[0020] By adopting the above technical solutions, the stability and reliability of medical personnel's control over the handheld device can be improved, and the probability of slippage during operation affecting the quality of surgery can be reduced.

[0021] Optionally, the control member has anti-slip protrusions on both sides along the axial direction of the handheld member, and when the control member moves inward to its limit position, an anti-slip groove is formed between the anti-slip protrusions on both sides.

[0022] By adopting the above technical solution, when medical personnel control the handheld device by pressing the control device, the probability of releasing the control device due to slippage or resistance can be reduced, thereby further improving the stability and reliability of the medical personnel's operation of the control device.

[0023] Optionally, the sheath has a radiopaque ring located near the balloon.

[0024] By adopting the above technical solution, medical personnel can easily observe the position of the balloon in the patient's lungs using imaging equipment such as CT, which facilitates more precise operation based on the balloon's position information.

[0025] On the other hand, this application also provides a method for using a catheter based on a bronchoscope, employing the following technical solution: A method of using a bronchoscope-based catheter, based on the above-mentioned bronchoscope-based catheter, includes the following steps: S1. Using a bronchoscope, insert one end of the bronchoscope into the main trachea; S2. Using the sheath, pass the sheath through the bronchoscope channel so that the end of the sheath extends into the bronchus; S3. Select different surgical tools according to needs and use them with the help of the sheath: When a tissue biopsy is required, the biopsy forceps are inserted through the working channel to complete the biopsy; When tissue ablation is required, the ablation needle is inserted through the working channel to complete the ablation. When tissue blockage is required, the balloon is inflated by inflating the ventilation channel through the sheath handle to complete the blockage; When tissue expansion is required, the expansion tube is inserted through the working channel to complete the expansion. When tissue puncture sampling is required, the puncture needle and the dilation tube are inserted through the cavity, and the puncture part is moved by the puncture handle to complete the puncture sampling.

[0026] In summary, this application includes at least one of the following beneficial effects: 1. It can simultaneously meet the needs of puncture, dilation, biopsy, and occlusion, simplifying surgical procedures, reducing surgical difficulty, and effectively reducing the probability of tissue damage to patients; 2. It enables medical personnel to choose the appropriate puncture sampling method according to clinical needs, and at the same time improves the standardization and safety of stepwise puncture sampling procedures; 3. It allows medical personnel to easily observe the position of the balloon in the patient's lungs during surgery, and enables them to perform more precise operations based on the balloon's position information, further reducing the probability of tissue damage during surgery. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a catheter used with a bronchoscope in Example 1 (when the balloon is used for occlusion). Figure 2 This is a cross-sectional view of Example 1, showing a catheter used in bronchoscopy passing through the bronchoscope (when the balloon is used for occlusion). Figure 3 This is a partial cross-sectional view of a catheter used with a bronchoscope in Example 1; Figure 4 This is a schematic diagram of the structure of the sheath with another structure in Example 1 after the expansion tube is inserted; Figure 5 This is a schematic diagram of the structure of a catheter used in bronchoscopy when it passes through the bronchoscope (when the balloon is used for occlusion) in Example 2. Figure 6 This is a cross-sectional view of Example 2 of a bronchoscope-based catheter passing through the bronchoscope (when the balloon is used for occlusion). Figure 7 This is a partial cross-sectional view of the puncture handle in Example 2; Figure 8 This is a schematic diagram of the internal structure of the puncture handle in Example 2.

[0028] Explanation of reference numerals in the attached drawings: 1. Bronchoscope; 11. Forceps channel; 2. Sheath; 21. Sheath handle; 22. Working channel; 23. Ventilation channel; 3. Dilatator; 31. Dilatator handle; 32. Cavity; 4. Puncture needle; 41. Puncture handle; 411. Handhold; 4111. Groove; 4112. Anti-slip protrusion; 4113. Anti-slip groove; 412. Threaded part; 413. Connector; 414. Control part; 415. Elastic part; 416. Limiting part; 417. First magnet; 418. Second magnet; 42. Puncture section; 5. Balloon; 6. Contrast ring. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail. Example 1

[0030] Reference Figure 1 and Figure 2This application discloses a catheter based on a bronchoscope, which is used with a bronchoscope 1 and is used by medical personnel to perform operations such as puncture, dilation, biopsy, and occlusion on the tissue of the patient's lung bronchi according to clinical surgical needs.

[0031] The catheter includes a sheath (2), a dilator (3), a puncture needle (4), and a balloon (5).

[0032] Reference Figure 2 and Figure 3The sheath 2 has a conical tubular structure. Its constricted end is used to pass through the forceps 11 of the bronchoscope 1, allowing the end near its constricted end to extend into the bronchus of the lung. The other end of the sheath 2 extends outward with a sheath handle 21, which has a working channel 22 for tools such as the dilator 3, biopsy forceps, and ablation needle to pass through. The working channel 22 extends along the length of the sheath 2 and forms openings at both ends along the length of the sheath 2. The balloon 5 is fixedly installed on the outside of the sheath 2, near the end of the sheath 2 away from the sheath handle 21, and the sheath 2 is... Both ends of the balloon 5 have a narrowed diameter structure, which allows the balloon 5 to conform to the outer wall of the sheath 2 when it is in the deflation state, reducing the probability that its protrusion will affect the end of the sheath 2 extending into the bronchus. The inside of the sheath 2 is also provided with a ventilation channel 23 for controlling the gas in and out of the balloon 5. The ventilation channel 23 is adjacent to the working channel 22 but not connected to it. One end of the ventilation channel 23 is connected to the internal space of the balloon 5, and the other end forms an opening at the end of the sheath handle 21, which makes it convenient for medical personnel to control the inflation and deflation of the balloon 5 through the sheath handle 21. In this embodiment, the preferred sheath 2 is made of a mixture of PA (polyamide), PEBAX (polyether block polyamide), and PE (polyethylene) through an extrusion process, wherein PA accounts for approximately 30%, PE approximately 30%, and PEBAX approximately 30% (because PA alone is too hard to pass through the complex bronchial routes of the lungs, and PE or PEBAX alone is too soft and is prone to collapse when used as an instrument channel). Preferably, the overall outer diameter of the sheath 2 is no greater than 2.0 mm (this allows it to pass smoothly through the forceps 11 of the bronchoscope 1), the length is greater than 650 mm (this allows it to pass through the lung bronchi with the assistance of the bronchoscope 1, better reaching the area requiring treatment), and the inner diameter is 1.45-1.55 mm, larger than the outer diameter of the smallest biopsy forceps and ablation needles on the market (this allows for the use of micro-surgical devices such as biopsy forceps and ablation needles). The therapeutic device can operate through the sheath 2, which serves to establish a channel and protect tissue. Preferably, the opening formed at the end of the sheath handle 21 is compatible with the Luer connector, allowing medical personnel to control the inflation and deflation of the balloon 5 through the ventilation channel 23. Preferably, the balloon 5 is made of natural rubber using a blow molding process, with a single-sided wall thickness of no more than 0.1 mm. It is fixedly connected to the outside of the sheath 2 by adhesive bonding. In the inflated state, the balloon 5 can reach a diameter of more than 4 mm, and in the deflated state, it can conform to the outer wall of the sheath 2 without wrinkling or folding, and will not scrape tissue or increase the outer diameter during the push. Preferably, the diameter reduction structure is located 15-30 mm from the front end of the sheath 2, so that its outer diameter is 1.65-1.70 mm and its inner diameter is not less than 1.5 mm, ensuring that the sheath 2 can pass smoothly through the forceps channel 11 of the bronchoscope 1 and that tools such as biopsy forceps and ablation needles can pass through the working channel 22.

[0033] Reference Figure 4In this embodiment, the sheath 2 can also be used with different structures. The expansion tube 3 is also inserted into the working channel 22 for use. In addition, a structure is installed on the outside of the sheath handle 21 to facilitate medical personnel to control the gas in and out of the ventilation channel 23.

[0034] Reference Figure 1 and Figure 3 Furthermore, since the sheath 2 loses the visual aid provided by the internal space of the bronchoscope 1 after passing through the clamp channel 11 of the bronchoscope 1, a contrast ring 6 is fixedly installed on the outer side of the sheath 2 near the sheath handle 21 of the balloon 5 to facilitate more precise control of the end of the sheath 2 by medical personnel. In this embodiment, it is preferred that the position of the contrast ring 6 on the sheath 2 is 5-10 mm away from the balloon 5; and preferably the contrast ring 6 is supported by precious metal, with a length of 3 mm, an outer diameter of 1.9 mm and an inner diameter of 1.7 mm, and medical personnel can observe the position of the contrast ring 6 in the lungs with the help of equipment such as CT (computed tomography).

[0035] Reference Figure 1 and Figure 2 The dilator 3 has a tubular structure, and one end of its axis has a dilator handle 31 that allows medical personnel to control the other end to pass through the working channel 22. When the dilator 3 passes through the working channel 22 and the dilator handle 31 comes into contact with the side of the sheath 2 near the sheath handle 21, the sheath 2 restricts the dilator 3 from going deeper, and at this time the end of the dilator 3 away from the dilator handle 31 passes out of the sheath 2. In this embodiment, the surface of the dilation handle 31 is preferably covered with anti-slip texture to reduce the probability of slippage and operational errors during use by medical personnel; the front end of the dilation tube 3 preferably has a 30-60° bevel to enable it to perform puncture and dilation, and to establish a channel for the sheath tube 2 for guidance. It has a cavity 32 in the middle to provide a channel for the insertion of the puncture needle 4 and to facilitate the injection of liquids, drugs, etc. during treatment; and the dilation tube 3 preferably is made of a mixture of PA (polyamide), PEBAX (polyether block polyamide), and PE (polyethylene) through an extrusion process, wherein PA is close to 80%, PE is close to 10%, and PEBAX is close to 10% (because PA material alone is too hard and cannot pass through the complex bronchial route of the lungs, and PE or PEBAX material alone is too soft and cannot play a role in puncture and dilation).

[0036] The puncture needle 4 has a puncture portion 42 for puncturing lung tissue and a puncture handle 41 for controlling the puncture portion 42 to puncture the lung tissue at both ends. After the puncture needle 4 inserts the puncture portion 42 into the cavity 32, the puncture handle 41 will contact and abut against the dilation handle 31, and at this time the puncture portion 42 will be hidden inside the dilation tube 3 at the end away from the dilation handle 31. In this embodiment, the puncture portion 42 of the puncture needle 4 is preferably made of nickel-titanium alloy material, with a 30-60° bevel at the front end and a pointed tip, which facilitates its function of breaking up the tissue wall; and preferably the puncture handle 41 is injection molded from a soft material with elastic properties, which is connected to the puncture portion 42 by an adhesive process. After pressing the puncture handle 41, the puncture portion 42 will extend out of the dilation tube 3 to puncture and break up the tissue wall. After stopping the pressing of the puncture handle 41, the puncture portion 42 will retract into the cavity 32 during the recovery process of the puncture handle 41.

[0037] The implementation principle of a catheter used in bronchoscopy according to an embodiment of this application is as follows: After the sheath 2 is installed on the bronchoscope 1, medical personnel can select appropriate tools based on the sheath 2 to perform operations such as puncture, dilation, biopsy, and occlusion on the tissue of the patient's lung bronchi according to the needs of clinical surgery. When it is necessary to puncture and dilate the tissue of the patient's lung bronchus, according to the position of the imaging ring 6 inside the lung, after the end of the sheath tube 2 reaches the accurate position, the dilator tube 3 and the puncture needle 4 can be passed through the working channel 22 together, and finally the puncture handle 41 is controlled to pass through the puncture part 42 to complete the puncture. When it is necessary to perform biopsy and ablation on the bronchial tissue of the patient's lungs, the end of the sheath 2 is positioned accurately according to the location of the imaging ring 6 inside the lung. Then, the biopsy forceps and ablation needle are passed through the working channel 22, and finally the biopsy forceps and ablation needle are controlled to complete the biopsy and ablation. When it is necessary to block the tissue of the patient's lung bronchi, the end of the sheath 2 is positioned accurately according to the location of the imaging ring 6 inside the lung. Then, the gas can be controlled by the sheath handle 21 to enter and exit the balloon 5 through the ventilation channel 23 to control the inflation and deflation of the balloon 5, thereby completing the blockage or deblocking. Example 2

[0038] Reference Figure 5 and Figure 6 The difference between this embodiment and embodiment 1 is that the puncture handle 41 makes it easier for medical personnel to control the puncture part 42 to complete the puncture at an appropriate puncture speed and puncture distance according to their needs.

[0039] Reference Figure 7 and Figure 8The puncture handle 41 includes a hand-held part 411, a plurality of threaded parts 412, a connector 413, a plurality of control parts 414, a plurality of elastic parts 415, a limiting part 416, a plurality of first magnets 417 and a plurality of second magnets 418.

[0040] The connector 413 is a hollow cylindrical structure, installed on one side of the expansion handle 31, and its internal space communicates with the cavity 32. In this embodiment, the outer surface of the connector 413 is preferably threaded, and the axis of the connector 413 is preferably coincident with the axis of the expansion tube 3 and the axis of the cavity 32.

[0041] Reference Figure 6 and Figure 7 The handheld part 411 has a cylindrical structure. One end of its axis extends and is fixedly connected to the puncture part 42. The side of the handheld part 411 near the puncture part 42 has a groove 4111 to make way for the connector 413. When the handheld part 411 moves to its limit position in the direction of the expansion handle 31, the connector 413 will be completely inserted into the groove 4111, and at this time the puncture part 42 will extend out of the expansion tube 3. When the handheld part 411 moves away from the expansion handle 31 until the connector 413 leaves the groove 4111, the puncture part 42 will retract into the cavity 32.

[0042] Reference Figure 7 and Figure 8 The threaded component 412 is movably mounted on the handheld component 411, and its direction of movement is perpendicular to the axis of the handheld component 411. The side of the threaded component 412 near the groove 4111 has a thread that engages with the threaded component 413, and the threaded side can move in and out of the groove 4111 during its movement relative to the handheld component 411. In this embodiment, the piercing handle 41 preferably includes two threaded components 412, and the two threaded components 412 are arranged in a circular array on the handheld component 411 with the axis of the handheld component 411 as the axis.

[0043] The threaded part 412 is restricted in its movement relative to the handheld part 411. When both threaded parts 412 move inward to their limit positions relative to the handheld part 411, the threaded portion of the threaded part 412 will be located in the groove 4111, and the medical personnel can control the movement and rotation of the handheld part 411 relative to the connector 413, so that both threaded parts 412 are threadedly engaged with the connector 413; when the threaded part 412 moves outward to its limit position relative to the handheld part 411, the threaded part 412 will leave the groove 4111.

[0044] The elastic element 415 is installed inside the handheld component 411 and has the tendency to drive the two threaded components 412 to move inward relative to the handheld component 411 to their limit positions and maintain them. In this embodiment, the elastic element 415 is preferably an elastic annular structure, which is circular in its normal state, with its two ends in contact with the two threaded components 412 respectively, and at this time the two threaded components 412 are kept in the state of moving inward to their limit positions under its elastic force; and preferably the piercing handle 41 includes a total of one elastic element 415.

[0045] The control element 414 is movably mounted on the handheld element 411, and its direction of movement is perpendicular to the axis of the handheld element 411. The side of the control element 414 away from the groove 4111 remains outside the handheld element 411 during its movement relative to the handheld element 411, while the side of the control element 414 near the groove 4111 remains connected to the elastic element 415 during its movement relative to the handheld element 411. In this embodiment, the puncture handle 41 preferably includes two control elements 414, which are arranged in a circular array on the handheld element 411 about the axis of the handheld element 411 and are offset from the two threaded elements 412.

[0046] The control member 414 is restricted in its movement relative to the handheld member 411, and its movement causes the elastic member 415 to deform. When both control members 414 move outward to their limit positions relative to the handheld member 411, the elastic member 415 remains in a circular shape; when the control member 414 moves inward to its limit position relative to the handheld member 411, the elastic member 415 deforms into an elliptical ring shape, and causes the two threaded members 412 to move outward to their limit positions relative to the handheld member 411.

[0047] Furthermore, preferably, the outer side of the handheld component 411 is evenly distributed with multiple anti-slip protrusions 4112 to facilitate the medical personnel's control of the rotation of the handheld component 411 relative to the connecting component 413. In this embodiment, the anti-slip protrusions 4112 are preferably elongated, with their length direction parallel to the axial direction of the handheld component 411, and the multiple anti-slip protrusions 4112 are arranged in a circular array with the axial direction of the handheld component 411 as the axis.

[0048] Some of the anti-slip protrusions 4112 provide space for the control member 414. When the control member 414 moves outward to its limit relative to the handheld member 411, the outer surface of the control member 414 will be flush with the adjacent anti-slip protrusion 4112. When the control member 414 moves inward to its limit relative to the handheld member 411, the outer side of the control member 414 will form an anti-slip groove 4113 between the adjacent anti-slip protrusions 4112.

[0049] At this time, the multiple anti-slip protrusions 4112 can increase resistance and prevent slippage when the medical personnel need to control the rotation of the handpiece 411, while the anti-slip grooves 4113 can facilitate the medical personnel to press the control piece 414 to drive it to move inward to the limit position while controlling the movement of the handpiece 411, which also increases resistance and prevents slippage.

[0050] Reference Figure 6 and Figure 7 The limiting member 416 has an overall ring structure and is sleeved on the outside of the connector 413, and it is threadedly engaged with the connector 413. The side of the hand-held member 411 near the expansion handle 31 is aligned with the limiting member 416 along its axial direction. By adjusting the position of the limiting member 416 on the connector 413, the length of the puncture part 42 extending out of the expansion tube 3 when the hand-held member 411 moves to the limit position in the direction close to the expansion handle 31 can be limited.

[0051] The first magnet 417 is fixedly installed on the side of the limiting member 416 away from the expansion handle 31, and the second magnet 418 is fixedly installed on the side of the handheld member 411 near the expansion handle 31, with the first magnet 417 and the second magnet 418 aligned along the direction of movement of the handheld member 411. In this embodiment, the piercing handle 41 preferably includes one first magnet 417 and one second magnet 418.

[0052] The first magnet 417 and the second magnet 418 repel each other magnetically. Under the repulsive force of the first magnet 417 and the second magnet 418, the handheld part 411 can move away from the expansion handle 31 until the connecting part 413 is just away from the groove 4111. At the same time, during the process of controlling the handheld part 411 to move closer to the limiting part 416, the repulsive force of the first magnet 417 and the second magnet 418 can provide resistance to prevent the medical personnel from operating too fast during this process, which would cause the puncture part 42 to be over-punctured.

[0053] The implementation principle of a catheter used in bronchoscopy according to an embodiment of this application is as follows: When it is necessary to puncture the tissue of the patient's lung bronchus, according to the location of the imaging ring 6 inside the lung, after the end of the sheath 2 is brought to the accurate position, the dilator 3 and the puncture needle 4 can be passed through the working channel 22 together. Next, the required puncture depth is determined based on clinical surgical needs. Then, the limiting member 416 is installed on the connector 413 and its position is adjusted. Following this, the movement of the handheld member 411 is controlled according to the required puncture speed of the puncture head 42. When a faster puncture is needed, pressing both control members 414 and simultaneously moving the handheld member 411 towards the limiting member 416 completes the puncture. After the puncture is completed, the magnetic repulsion force... The medical personnel assist the handheld device 411 in retracting and resetting; when the puncture part 42 needs to complete the puncture at a slower speed, after controlling the handheld device 411 to move towards the limiting part 416, the two threaded parts 412 are threadedly engaged with the connecting part 413, and the handheld device 411 is rotated so that it moves towards the limiting part 416 to complete the puncture. After the puncture is completed, pressing the two control parts 414 will assist the medical personnel in quickly retracting and resetting the handheld device 411 under the action of magnetic repulsion. Example 3

[0054] Reference Figure 1 and Figure 2 This application discloses a method of using a bronchoscope-based catheter, applied to a bronchoscope-based catheter disclosed in Embodiment 1, including the following steps: S1. Using bronchoscope 1, insert one end of bronchoscope 1 into the main trachea.

[0055] One end of the bronchoscope 1 is inserted into the bronchus of the patient's lung, so that the clamp channel 11 of the bronchoscope 1 provides a channel for the subsequent use of the catheter, while effectively protecting the bronchus of the patient's lung.

[0056] S2. Using sheath 2, pass sheath 2 through the clamp channel 11 of bronchoscope 1 so that the end of sheath 2 extends into the bronchus.

[0057] The end of the sheath 2 away from the sheath handle 21 is inserted into the clamp channel 11 of the bronchoscope 1. The position of the contrast ring 6 in the lung is observed by CT and other equipment, so that the end of the sheath 2 can be accurately positioned for the surgery. At the same time, the working channel 22 inside the sheath 2 provides space for subsequent surgery and further protects the bronchi of the patient's lungs.

[0058] S3. Select different surgical tools according to needs and use them with the help of the sheath 2: When a tissue biopsy is required, the biopsy forceps are inserted through the working channel 22 to complete the biopsy; When tissue needs to be ablated, the ablation needle is inserted through the working channel 22 to complete the ablation. When tissue occlusion is required, the balloon 5 is inflated by inflating the ventilation channel 23 through the sheath handle 21 to complete the occlusion; When tissue expansion is required, the expansion tube 3 is inserted through the working channel 22 to complete the expansion; When tissue puncture sampling is required, the puncture needle 4 and the dilation tube 3 are inserted through the cavity 32, and the puncture part 42 is moved by the puncture handle 41 to complete the puncture sampling.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A catheter used with a bronchoscope, characterized in that, It includes a sheath (2), a dilator (3), a puncture needle (4), and a balloon (5); One end of the sheath (2) extends outward with a sheath handle (21), and the balloon (5) is located on the outside of the other end of the sheath (2). The sheath (2) has a reduced diameter structure at both ends of the balloon (5). The interior of the sheath (2) has a working channel (22) through which the expansion tube (3) passes and a ventilation channel (23) communicating with the interior of the balloon (5). The end of the ventilation channel (23) away from the balloon (5) forms an opening on the sheath handle (21). One end of the expansion tube (3) has an expansion handle (31), and after the other end of the tube is inserted into the working channel (22), the expansion handle (31) is located on the side of the sheath tube (2) close to the sheath handle (21), and the end of the expansion tube (3) away from the expansion handle (31) extends out of the sheath tube (2). The interior of the dilation tube (3) has a cavity (32) through which the puncture needle (4) passes. One end of the puncture needle (4) is a puncture part (42) and the other end has a puncture handle (41). After the puncture needle (4) is inserted into the cavity (32), the puncture handle (41) is located on the side of the dilation tube (3) closer to the dilation handle (31), and the puncture part (42) is close to the end of the dilation tube (3) away from the dilation handle (31).

2. The catheter for use with a bronchoscope according to claim 1, characterized in that, The puncture handle (41) is used to control the puncture part (42) to enter and exit the cavity (32), and the puncture part (42) is normally located in the cavity (32).

3. The catheter for use with a bronchoscope according to claim 2, characterized in that, The puncture handle (41) includes a handpiece (411), several threaded parts (412) and a connector (413). The connector (413) is located on one side of the expansion handle (31) and connected to the expansion handle (31). Several threaded parts (412) are disposed on the handheld part (411), and the threaded parts (412) are used to engage with the outer thread of the connector (413). The handheld part (411) is movably installed on the end of the puncture needle (4) away from the puncture part (42). The handheld part (411) is used to rotate and move relative to the puncture needle (4). Its rotation axis coincides with its own axis and the axis of the puncture needle (4), and its movement direction is parallel to its axis.

4. A bronchoscope-based catheter according to claim 3, characterized in that, The puncture handle (41) also includes several control elements (414) and several elastic elements (415). The threaded component (412) is movably connected to the handheld component (411), and its direction of movement is perpendicular to the axial direction of the handheld component (411); the control component (414) is movably connected to the handheld component (411), and its direction of movement is perpendicular to the axial direction of the handheld component (411) and perpendicular to the direction of movement of the threaded component (412); the elastic component (415) is disposed inside the handheld component (411), and it is simultaneously connected to a plurality of the threaded components (412) and a plurality of the control components (414); the elastic component (415) has a tendency to drive the threaded component (412) to move inward to a state for engaging with the outer thread of the connector (413), and at this time the control component (414) moves outward to its limit position.

5. A bronchoscope-based catheter according to claim 4, characterized in that, The puncture handle (41) also includes a limiting member (416). The limiting member (416) is sleeved on the connecting member (413) and threadedly engaged with the connecting member (413), and the limiting member (416) is located on the side of the handheld member (411) near the puncture part (42).

6. A bronchoscope-based catheter according to claim 5, characterized in that, The puncture handle (41) also includes a plurality of first magnets (417) and a plurality of second magnets (418). A plurality of first magnets (417) are disposed on the limiting member (416), and a plurality of second magnets (418) are disposed on the handheld member (411), wherein the first magnets (417) and the second magnets (418) repel each other.

7. A bronchoscope-based catheter according to claim 4, characterized in that, The outer side of the handpiece (411) has multiple anti-slip protrusions (4112).

8. A bronchoscope-based catheter according to claim 7, characterized in that, The control member (414) has anti-slip protrusions (4112) on both sides along the axial direction of the handheld member (411), and when the control member (414) moves inward to the limit position, an anti-slip groove (4113) is formed between the anti-slip protrusions (4112) on both sides.

9. A bronchoscope-based catheter according to claim 1, characterized in that, The sheath (2) has a radiopaque ring (6) located near the balloon (5).

10. A method of using a catheter based on a bronchoscope, characterized in that, Based on a bronchoscope-based catheter as described in any one of claims 1-9, the procedure includes the following steps: S1. Using a bronchoscope (1), insert one end of the bronchoscope (1) into the main trachea; S2. Using the sheath (2), pass the sheath (2) through the clamp channel (11) of the bronchoscope (1) so that the end of the sheath (2) extends into the bronchus; S3. Select different surgical tools according to the needs and use them with the help of the sheath (2): When a biopsy is required, the biopsy forceps are inserted through the working channel (22) to complete the biopsy; When tissue needs to be ablated, the ablation needle is inserted through the working channel (22) to complete the ablation. When tissue blockage is required, the balloon (5) is inflated by inflating the ventilation channel (23) through the sheath handle (21) to complete the blockage; When it is necessary to expand the tissue, the expansion tube (3) is inserted through the working channel (22) to complete the expansion; When tissue puncture sampling is required, the puncture needle (4) and the dilation tube (3) are inserted through the cavity (32), and the puncture part (42) is moved by the puncture handle (41) to complete the puncture sampling.

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