Tip structure for bronchial smooth muscle radiofrequency ablation catheter

Abstract

The application discloses a top end structure of a bronchial smooth muscle radiofrequency ablation catheter, and belongs to the technical field of medical radiofrequency ablation. The top end structure of the bronchial smooth muscle radiofrequency ablation catheter comprises a stainless steel thin tube, one end of the stainless steel thin tube is fixedly provided with a tail electrode limiting column, a plurality of electrode pieces are clamped on the tail electrode limiting column, the other end of the stainless steel thin tube is provided with a head electrode limiting column, the electrode pieces are inserted into the interior of the head electrode limiting column and freely move in the interior of the head electrode limiting column, one end of the head electrode limiting column is fixedly provided with an outer sleeve, the stainless steel thin tube is inserted from one end of the head electrode limiting column and extends to the other end of the outer sleeve through the outer sleeve, and the outer sleeve is provided with a clamping assembly. The clamping assembly can effectively enhance the adaptability of the structure when coping with different electrode piece use requirements, can realize the function that the electrode pieces in the radiofrequency ablation catheter automatically return to the initial shape, and guarantees the practical safety of the structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical radiofrequency ablation, more particularly, to the tip structure of a bronchial smooth muscle radiofrequency ablation catheter. BACKGROUND

[0002] Bronchial asthma (asthma for short) is a common and frequently-occurring disease that seriously endangers health. In China, there are about 35 million asthma patients. One of the main pathogenic mechanisms of asthma is airway smooth muscle contraction, airway spasm, which further leads to a decrease in airway diameter and respiratory difficulty. The main treatment for asthma at present is to inhale hormones and airway dilators through the airway to relieve respiratory difficulty. However, for severe asthma patients, the bronchial smooth muscle thickens, leading to a decrease in the bronchial diameter and a limitation of respiratory function. The thickened smooth muscle also secretes excessive cytokines, further causing airway spasm. The effect of inhaling hormones and airway dilators becomes lower and lower with the extension of the treatment time. In summary, the main treatment for asthma at present is drug treatment, and the effect is very limited for severe asthma patients. There is an urgent need for a new and effective treatment method to reduce the thickness of the smooth muscle, expand the airway diameter, and relieve the respiratory difficulty of patients.

[0003] In recent years, a new minimally invasive surgical method for treating bronchial asthma by electrode radiofrequency has gradually been favored by doctors and patients. The current design of the tip of the electrode radiofrequency catheter is to weld two ends of four electrode pieces of a certain length into one body, and the middle is connected by a stainless steel wire with a coating. By stretching the stainless steel wire, the electrode pieces are opened and closed to form a spherical treatment site. A certain strength of electricity is conducted to the four electrode pieces through the stainless steel wire, and after contacting the tracheal wall, a closed loop is formed through the human body.

[0004] Based on the above, the present inventors have found that:

[0005] In the treatment of bronchial asthma by mechanical energy using radiofrequency ablation, there may be some drawbacks.

[0006] 1. The number of electrode pieces that can be connected to the same radiofrequency ablation catheter is a fixed value. When the number of electrode pieces in the radiofrequency ablation catheter needs to be adjusted, a new radiofrequency ablation catheter must be replaced for use, thereby reducing the use effect of the radiofrequency ablation catheter in response to different electrode pieces.

[0007] 2. The electrode pieces in the radiofrequency ablation catheter do not have the ability to automatically return to the initial shape when deformed into an ellipsoid or a hammer shape, which may cause a certain friction between the electrode pieces in the radiofrequency ablation catheter and the inner wall of the bronchus, thereby affecting the practical safety of the device.

[0008] Therefore, in view of the above, the top end structure of the bronchial smooth muscle radiofrequency ablation catheter is provided to achieve a more practical purpose. SUMMARY

[0009] 1. Technical problems to be solved

[0010] In view of the problems in the prior art, the purpose of the present application is to provide a top end structure of a bronchial smooth muscle radiofrequency ablation catheter, which can effectively enhance the adaptability of the structure when dealing with different electrode sheet use requirements, improve the use effect of the device, and at the same time realize the function of automatically returning the electrode sheet in the radiofrequency ablation catheter to the initial shape, avoiding the friction between the electrode sheet in the radiofrequency ablation catheter and the inner wall of the bronchus, and ensuring the practical safety of the structure.

[0011] 2. Technical solutions

[0012] To solve the above problems, the technical scheme adopted by the present application is as follows.

[0013] The top end structure of the bronchial smooth muscle radiofrequency ablation catheter comprises a stainless steel thin tube, one end of the stainless steel thin tube is fixedly provided with a tail electrode limiting column, a plurality of electrode sheets are clamped on the upper part of the tail electrode limiting column, the other end of the stainless steel thin tube is provided with a head electrode limiting column, the electrode sheets are inserted into the inside of the head electrode limiting column and can move freely in the inside of the head electrode limiting column, one end of the head electrode limiting column is fixedly provided with a sleeve tube, the stainless steel thin tube is inserted from one end of the head electrode limiting column and extends to the other end of the sleeve tube through the sleeve tube, and a clamping assembly is arranged on the sleeve tube.

[0014] The clamping assembly comprises an elastic clamping piece, the top end of the elastic clamping piece is provided with a pull rope, a plurality of fixed pulleys are arranged on the side surface of the pull rope, and a winding disc is connected after the pull rope is turned through the fixed pulleys.

[0015] Further, a plurality of parallel arranged alignment sockets are arranged at one end of the stainless steel thin tube, and the alignment sockets and the elastic clamping piece are clamped.

[0016] Further, the tail electrode limiting column comprises an arc-shaped head, the arc-shaped head is fixedly connected with a clamping head through electric welding, and one end of the clamping head is fixedly provided with a binding sleeve through electric welding.

[0017] Further, eight clamping holes are arranged on the clamping head, one end of the electrode sheet passes through the binding sleeve and is clamped with the corresponding clamping hole one by one.

[0018] Further, the electrode piece is fixed with an oval head at one end away from the tail electrode limiting column, a first through hole in sliding connection with the electrode piece is formed at one end inside the head electrode limiting column, a second through hole in sliding connection with the oval head is formed at the other end inside the head electrode limiting column, and the second through hole and the first through hole are in communication with each other.

[0019] Further, a plugging disc is fixed inside the second through hole, and a first spring member is fixedly connected between the plugging disc and the oval head.

[0020] Further, the elastic clamping member includes two left-right symmetrically arranged limiting supports, two clamping strips are in sliding connection with the inner side of the limiting support, a second spring member is sleeved on the inner side of the limiting support between the two clamping strips, and a pressing frame is in sliding connection with the position of the inner side of the limiting support in contact with the clamping strip, and the pressing frame is inserted into the limiting support and keeps free sliding.

[0021] Further, one end of the pressing frame is fixed with a rack, the rack is in sliding connection inside the limiting support, and the rack is in meshing connection with a gear member, one end of the gear member is fixed with a concentric shaft winding wheel, and one end of the pull rope is wound on the side surface of the concentric shaft winding wheel.

[0022] Further, the two racks are centrosymmetric around the gear member.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the advantages of the present application are:

[0025] (1) In the present scheme, when the radio frequency ablation catheter is in use, the electrode piece is inserted into the clamping head through the clamping sleeve, and then the arc head, the clamping head and the clamping sleeve are welded in sequence to form an integrated fixing of the tail electrode limiting column and the electrode piece. In this process, according to the actual demand for the number of electrode pieces, corresponding welding elements are used to realize the replacement of only the required number of electrode pieces, tail electrode limiting columns and head electrode limiting column shells, which can effectively enhance the adaptability of the structure in response to different electrode piece usage requirements and improve the use effect of the device.

[0026] (2) the scheme, in the electrode piece in radio frequency ablation catheter is deformed into ellipsoid or hammer, utilizes the rotation of winding disc to drive the pull rope to move, and then controls the rotation of concentric shaft around wheel and gear piece, on the basis of the meshing connection between gear piece and rack, can control the compression frame to compress the clamping strip, and then makes the clamping strip form the clamping of the alignment clamp, and realizes the locking of the deformed shape of the electrode piece in radio frequency ablation catheter, when the shape of the electrode piece in radio frequency ablation catheter needs to be restored, the winding disc is loosened, the compression frame and the clamping strip are separated under the elastic force of the second spring piece, the automatic restoration of the electrode piece in radio frequency ablation catheter to the initial shape can be realized, the friction between the electrode piece in radio frequency ablation catheter and the inner wall of the bronchus is avoided, and the practical safety of the structure is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the application;

[0028] Figure 2 It is a structural schematic diagram of the application Figure 1 It is a structural schematic diagram of the enlarged A part;

[0029] Figure 3 It is a structural schematic diagram of the tail electrode limiting column;

[0030] Figure 4 It is a structural schematic diagram of the head electrode limiting column Figure 1 ;

[0031] Figure 5 It is a structural schematic diagram of the head electrode limiting column Figure 2 ;

[0032] Figure 6 It is a structural schematic diagram of the elastic clamping piece Figure 1 ;

[0033] Figure 7 It is a structural schematic diagram of the elastic clamping piece Figure 2 .

[0034] Mark explanation in the drawing:

[0035] 1, stainless steel pipe;101, alignment clamp;

[0036] 2, tail electrode limiting column;

[0037] 201, arc head;

[0038] 202, clamping head;2021, clamping hole;

[0039] 203, clamping sleeve;

[0040] 3, electrode piece;301, oval column head;

[0041] 4, head electrode limiting column; 401, first through hole; 402, second through hole; 4021, blocking disc; 4022, first spring member;

[0042] 5, outer sleeve tube;

[0043] 6, clamping assembly;

[0044] 601, elastic clamping member; 6011, limiting support; 6012, clamping strip; 6013, second spring member; 6014, pressing frame; 6015, rack; 6016, gear member; 6017, concentric shaft around wheel;

[0045] 602, pull rope; 603, fixed pulley; 604, winding disc. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0047] Embodiment:

[0048] Please refer to Figures 1-7 , the top structure of the bronchial smooth muscle radiofrequency ablation catheter includes a stainless steel thin tube 1, a tail electrode limiting column 2 is fixed at one end of the stainless steel thin tube 1, a plurality of electrode sheets 3 are clamped on the tail electrode limiting column 2, a head electrode limiting column 4 is arranged at the other end of the stainless steel thin tube 1, the electrode sheets 3 are inserted into the inside of the head electrode limiting column 4 and can move freely in the inside of the head electrode limiting column 4, an outer sleeve tube 5 is fixed at one end of the head electrode limiting column 4, the stainless steel thin tube 1 is inserted from one end of the head electrode limiting column 4 and extends to the other end of the outer sleeve tube 5 through the outer sleeve tube 5, and the outer sleeve tube 5 is provided with a clamping assembly 6.

[0049] The clamping assembly 6 includes an elastic clamping member 601, a pull rope 602 is arranged at the top end of the elastic clamping member 601, a plurality of fixed pulleys 603 are arranged on the side surface of the pull rope 602, and a winding disc 604 is connected after being turned through the fixed pulleys 603. When the winding disc 604 is shaken, the pull rope 602 can be pulled tight, then the force direction of the pull rope 602 is changed through the fixed pulleys 603, and the clamping between the elastic clamping member 601 and the alignment clamping port 101 can be controlled, wherein the winding disc 604 is selected to be of a type with a locking winding degree.

[0050] Please refer to Figure 4The one end of the stainless steel thin tube 1 is provided with a plurality of parallel arranged alignment sockets 101, and the alignment sockets 101 are clamped with the elastic clamping parts 601. When the alignment sockets 101 are clamped with the elastic clamping parts 601, the position of the stainless steel thin tube 1 can be bound, and the stability of the bound stainless steel thin tube 1 can be ensured.

[0051] Referring to Figure 1 , Figure 2 and Figure 3 , the tail electrode limiting column 2 comprises an arc-shaped head 201, the arc-shaped head 201 is fixedly connected with a clamping head 202 through electric welding, and one end of the clamping head 202 is fixedly provided with a binding sleeve 203 through electric welding. In actual use, according to the number of electrode sheets 3 required, the corresponding arc-shaped head 201 and clamping head 202 in the attached Figure 3 are welded to improve the applicability of the structure to different numbers of electrode sheets 3.

[0052] Referring to Figure 3 , eight clamping holes 2021 are formed in the clamping head 202, and one end of the electrode sheet 3 passes through the binding sleeve 203 and is clamped with the corresponding clamping hole 2021 one by one. As shown in the attached Figure 3 , the clamping head 202 with the number of clamping holes 2021 corresponding to the number of electrode sheets 3 can be replaced for use, and the number of clamping holes 2021 of the clamping head 202 is 4-8.

[0053] Referring to Figure 4 and Figure 5 , the end of the electrode sheet 3 away from the tail electrode limiting column 2 is fixedly provided with an oval-shaped head 301, the inside of the head electrode limiting column 4 is provided with a first through hole 401 for sliding connection with the electrode sheet 3, the inside of the head electrode limiting column 4 is provided with a second through hole 402 for sliding connection with the oval-shaped head 301, and the second through hole 402 and the first through hole 401 are in communication with each other. The electrode sheet 3 slides in the first through hole 401, and the oval-shaped head 301 slides in the second through hole 402, which can ensure the stability of the electrode sheet 3 during movement.

[0054] The inside of the second through hole 402 is fixedly provided with a plugging disc 4021, and the plugging disc 4021 and the oval-shaped head 301 are fixedly connected with a first spring part 4022. When the electrode sheet 3 needs to return to the initial shape, the oval-shaped head 301 can be pushed to move under the elastic force of the first spring part 4022, thereby improving the speed of the electrode sheet 3 returning to the initial shape, and the first spring part 4022 remains in a compressed state during the whole process.

[0055] Referring to Figure 6 and Figure 7The elastic clamping part 601 comprises two left and right symmetrical limiting supports 6011, the inner side of the limiting support 6011 is slidably connected with two clamping strips 6012, the inner side of the limiting support 6011 is sleeved with a second spring part 6013 between the two clamping strips 6012, and the inner side of the limiting support 6011 is slidably connected with a pressing frame 6014 at a position in contact with the clamping strip 6012, and the pressing frame 6014 is inserted into the limiting support 6011 and keeps free sliding. When the pressing frame 6014 moves, the clamping strip 6012 can be pressed, at this time, the second spring part 6013 is further compressed, and then the clamping strip 6012 is forced to form clamping with the positioning clamping hole 101, so as to realize the position fixing of the stainless steel thin tube 1, and in the whole process, the second spring part 6013 keeps the compressed state.

[0056] One end of the pressing frame 6014 is fixedly provided with a rack 6015, the rack 6015 is slidably connected in the limiting support 6011, and the rack 6015 is engagedly connected with a gear part 6016, one end of the gear part 6016 is fixedly provided with a concentric shaft winding wheel 6017, and one end of a pull rope 602 is wound on the side surface of the concentric shaft winding wheel 6017. When the pull rope 602 is pulled tight, the concentric shaft winding wheel 6017 and the gear part 6016 are driven to rotate, thereby making the rack 6015 and the pressing frame 6014 move, and realizing the adjustment of the position of the pressing frame 6014.

[0057] The two racks 6015 are centrally symmetrical around the gear part 6016. When the gear part 6016 rotates, the two racks 6015 synchronously approach or synchronously move away.

[0058] In use:

[0059] Firstly, according to the number of the actually used electrode sheet 3, the clamping head 202 corresponding to the clamping hole 2021 is selected and used.

[0060] Then, the selected structure combination is put into the bronchial smooth muscle radiofrequency ablation catheter, when the bronchial smooth muscle radiofrequency ablation catheter is used, the catheter is placed at the smooth muscle lesion position, when the stainless steel thin tube 1 is pulled outwards, the electrode sheet 3 is compressed and forms an ellipsoid or a hammer shape.

[0061] In the process, the electrode sheet 3 slides in the first through hole 401, the oval head 301 slides in the second through hole 402, and the first spring member 4022 is further compressed, and then the position of the stainless steel thin tube 1 is locked by the detent assembly 6, specifically: rotating the winding disc 604, the pull rope 602 is tightened, and the concentric shaft winding wheel 6017 and the gear member 6016 are driven to rotate, and then the rack 6015 and the pressing frame 6014 are moved to adjust the position of the pressing frame 6014, and when the pressing frame 6014 moves, the detent bar 6012 can be pressed, at this time the second spring member 6013 is further compressed, and then the detent bar 6012 is forced to be clamped with the counter-bite 101, the position of the stainless steel thin tube 1 is fixed, and during the whole process, the second spring member 6013 remains in a compressed state and locks the winding disc 604, so that the locking process is completed, and the circuit is connected to realize the treatment of radiofrequency ablation of the bronchus.

[0062] When the single treatment is completed, the winding disc 604 is locked, at this time the oval head 301 can be pushed to move under the elastic force of the first spring member 4022, and then the speed of the electrode sheet 3 returning to the initial shape is increased, and during the whole process, the first spring member 4022 remains in a compressed state.

[0063] Thus the single radiofrequency ablation treatment of bronchial smooth muscle is completed, and the structure can effectively enhance the adaptability of the structure in response to different electrode sheet 3 use requirements, improve the use effect of the device, and realize the function of automatically returning the electrode sheet 3 in the radiofrequency ablation catheter to the initial shape, avoid the friction between the electrode sheet 3 in the radiofrequency ablation catheter and the inner wall of the bronchus, and ensure the practical safety of the structure.

[0064] Finally, it should be noted that in the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the device or element indicated or implied to have a specific orientation, structure and operation, and therefore cannot be understood as limiting the present application.

[0065] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "set", "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0066] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art, according to the technical solution of the present application and the improved concept thereof, makes equivalent replacement or change within the technical range disclosed by the present application, and should be covered within the protection scope of the present application.

Claims

1. Tip structure of a bronchial smooth muscle radiofrequency ablation catheter, comprising a stainless steel tube (1), characterised in that: The tail electrode limiting column (2) is arranged at one end of the stainless steel thin tube (1), a plurality of electrode sheets (3) are clamped on the tail electrode limiting column (2), a head electrode limiting column (4) is arranged at the other end of the stainless steel thin tube (1), the electrode sheet (3) is inserted into the inside of the head electrode limiting column (4) and freely moves in the inside of the head electrode limiting column (4), an outer sleeve (5) is fixedly arranged at one end of the head electrode limiting column (4), the stainless steel thin tube (1) is inserted from one end of the head electrode limiting column (4) and extends to the other end of the outer sleeve (5) through the outer sleeve (5), and the outer sleeve (5) is provided with a clamping assembly (6); the clamping assembly (6) comprises elastic clamping pieces (601), the top end of the elastic clamping piece (601) is provided with a pull rope (602), and the side of the pull rope (602) is provided with a plurality of fixed pulleys (603) and is connected with a winding disc (604) after being turned through the fixed pulley (603). A plurality of parallel alignment sockets (101) are arranged at one end of the stainless steel thin tube (1), and the alignment socket (101) is clamped with the elastic clamping piece (601). The elastic clamping piece (601) comprises two left-right symmetrical limiting supports (6011), the inner side of the limiting support (6011) is slidably connected with two clamping strips (6012), the inner side of the limiting support (6011) is sleeved with a second spring piece (6013) between the two clamping strips (6012), the inner side of the limiting support (6011) is slidably connected with a pressing frame (6014) in contact with the clamping strip (6012), and the pressing frame (6014) is inserted into the inside of the limiting support (6011) and freely slides; One end of the pressing frame (6014) is fixedly provided with a rack (6015), the rack (6015) is slidably connected in the inside of the limiting support (6011), the rack (6015) is engagedly connected with a gear piece (6016), one end of the gear piece (6016) is fixedly provided with a concentric shaft winding wheel (6017), and one end of the pull rope (602) is wound on the side of the concentric shaft winding wheel (6017). The two racks (6015) are centrally symmetrical around the gear piece (6016).

2. The tip structure of a bronchial smooth muscle radiofrequency ablation catheter according to claim 1, characterized in that: The tail electrode limiting column (2) comprises an arc-shaped head (201), the arc-shaped head (201) is fixedly connected with a clamping head (202) through electric welding, and one end of the clamping head (202) is fixedly provided with a clamping sleeve (203) through electric welding.

3. The tip structure of a bronchial smooth muscle radiofrequency ablation catheter according to claim 2, characterized in that: Eight clamping holes (2021) are arranged on the clamping head (202), one end of the electrode sheet (3) passes through the clamping sleeve (203) and is clamped with the corresponding clamping hole (2021) one by one.

4. The tip structure for a bronchial smooth muscle radiofrequency ablation catheter of claim 1, wherein: The electrode piece (3) is fixed with an oval head (301) at one end away from the tail electrode limiting column (2), the inside one end of the head electrode limiting column (4) is provided with a first through hole (401) for sliding connection with the electrode piece (3), the inside other end of the head electrode limiting column (4) is provided with a second through hole (402) for sliding connection with the oval head (301), and the second through hole (402) and the first through hole (401) are in communication with each other.

5. The tip structure of a bronchial smooth muscle radiofrequency ablation catheter according to claim 4, characterized in that: The inside of the second through hole (402) is fixed with a plugging disc (4021), and a first spring member (4022) is fixedly connected between the plugging disc (4021) and the oval head (301).

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