Controllable bending catheter for interventional therapy

Abstract

The invention provides a controllable bending catheter for interventional therapy, and relates to the technical field of medical catheters. The controllable bending catheter for interventional therapy comprises a cannula, an adjusting assembly is installed on the cannula, the front portion of the adjusting assembly is in threaded connection with a large fastening ring, the front portion of the large fastening ring is in threaded connection with a stabilizing assembly, and a rear section assembly is fixedly installed in front of the stabilizing assembly. A plurality of middle section assemblies are installed in front of the rear section assembly, and a connecting outer pipe and a connecting inner pipe are installed between every two adjacent middle section assemblies. During use, the front section assembly is inserted into a human body, the front section assembly, the middle section assembly and the rear section assembly are in a non-forced connection state, the front section assembly, the middle section assembly and the rear section assembly can be conveniently inserted according to the human body structure, after insertion, the adjusting assembly and the large fastening ring can be rotated to tension the steel wire, and the front section assembly, the middle section assembly and the rear section assembly enter the forced connection state under the action of the steel wire to form a whole. And subsequent operation is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of medical catheters, in particular to a controllable bending catheter for interventional therapy. Background Art

[0002] Interventional radiology, also known as interventional therapy, is a rapidly developing discipline that integrates diagnostic imaging and clinical treatment. It is the collective name for a series of minimally invasive treatment techniques that utilize puncture needles, catheters, and other interventional devices to introduce specific instruments into the body's lesions through natural orifices or tiny incisions, guided and monitored by imaging equipment such as digital subtraction angiography, CT, ultrasound, and magnetic resonance imaging. It has become one of the three pillars of clinical practice, alongside traditional internal medicine and surgery.

[0003] Existing interventional treatments require inserting a catheter and then inserting a treatment cannula along the inside of the catheter. During the catheter insertion process, the insertion end of the catheter cannot bend flexibly and actively, and the doctor needs to repeatedly try the insertion angle to find the correct direction. The human body is complex and the organs have many branches, which is very inconvenient for interventional treatment. It often requires experienced doctors to operate very carefully, the operation is difficult, and the inserted catheter is not stable enough and is easily dislocated in the complex human body. Summary of the Invention

[0004] (1) Technical problems solved In response to the deficiencies of the prior art, the present invention provides a controllable bending catheter for interventional therapy, which solves the problems of the prior art catheters being unable to actively and flexibly bend, the inserted catheters being insufficiently stable, and being easily misplaced in the complex human body.

[0005] (2) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: a controllable bending catheter for interventional treatment, including a cannula, an adjustment component is installed on the cannula, a large fastening ring is threadedly connected to the front of the adjustment component, a stabilization component is threadedly connected to the front of the large fastening ring, a rear section component is fixedly installed in front of the stabilization component, a number of middle section components are installed in front of the rear section component, connecting outer tubes and connecting inner tubes are installed between adjacent middle section components, and a front section component is installed in front of the connecting outer tube and the connecting inner tube at the front.

[0006] Preferably, the adjustment assembly includes a rotating ball, an adjusting disk, a tube hole, a front ring, a clamping groove, a rotating ring, an inner hole, an outer guide shaft and a clamping ring. The adjusting disk is fixedly connected to the rear side wall of the rotating ball. A tube hole is provided inside the rotating ball to facilitate the insertion of the cannula. The front ring is clamped on the rotating ball. A clamping groove is provided on the spherical surface of the rotating ball. A rotating ring is installed inside the clamping groove. Several inner holes are provided on the circumferential surface of the rotating ring. The inner part of the inner hole is rotatably connected to the outer guide shaft. The inner side of the rotating ring is fixedly connected to the clamping ring.

[0007] By adopting the above technical solution, the adjustment dial can operate the rotation direction and angle of the rotating ball inside the front ring. The rotating ball is connected to the rotating ring on its spherical surface, and the retaining ring enables the rotating ring to rotate on the rotating ball and also to rotate with the rotating ball, which is highly flexible.

[0008] Preferably, the stabilizing assembly includes a stabilizing ring, a limiting ring, a front hole, a rear tube, an external mounting seat, a winding shaft and an external fastening ring, a plurality of limiting rings are fixedly connected to the inner front side wall of the stabilizing ring, a front hole is opened on the front side wall of the stabilizing ring, a rear tube is fixedly connected to the rear side wall of the stabilizing ring, a plurality of external mounting seats are fixedly connected to the rear side wall of the stabilizing ring, the internal rotatable connection of the external mounting seat is connected to the winding shaft, the left and right ends of the winding shaft are threadedly connected to the external fastening ring, and the outer fastening ring is located on the outside of the external mounting seat.

[0009] By adopting the above technical solution, the limiting ring is used to limit the rotating ball, and the winding shaft is connected to the front end of the steel wire for winding the steel wire. By twisting the outer fastening rings on both sides, the winding shaft can be limited and fixed inside the outer mounting seat to lock the winding shaft.

[0010] Preferably, the front of the large fastening ring is threadedly connected to the front ring, and the rear of the large fastening ring is threadedly connected to the rear pipe.

[0011] By adopting the above technical solution, the front ring can be rotated to move the adjustment component forward and backward along the large fastening ring. When the adjustment component is moved to the appropriate position, the large fastening ring can be used to lock the front ring and the rear tube to fix the position of the front ring.

[0012] Preferably, the rear section assembly includes a rear section outer tube, a rear section inner tube, a rear section support ring, a rear section inner seat, a rear section guide shaft and a rear section ball cover. The rear section inner tube is installed on the inner side of the rear section outer tube. The rear section outer tube and the rear section inner tube are both fixedly connected to the stabilizing ring. A rear section support ring is fixedly connected between the rear section outer tube and the rear section inner tube. Several rear section inner seats are fixedly connected to the circumferential surface of the rear section inner tube. The rear section inner seat is rotatably connected to the rear section guide shaft. Several rear section ball covers are fixedly connected in front of the rear section support ring.

[0013] By adopting the above technical solution, the rear section assembly is fixedly connected to the stabilizing assembly at the rear end, the front end is connected to the middle section assembly through the rear section ball cover, and the steel wire is wound around the rear section guide shaft.

[0014] Preferably, the middle section assembly includes a middle section outer tube, a middle section inner tube, a middle section support ring, a middle section inner seat, a middle section guide shaft, a middle section ball cover and a middle section ball rod. The middle section inner tube is installed on the inner side of the middle section outer tube, and two middle section support rings are fixedly connected between the middle section outer tube and the middle section inner tube. Several middle section inner seats are fixedly connected to the circumferential surface of the middle section inner tube, and the middle section guide shaft is connected to the inner rotation of the middle section inner seat. Several middle section ball covers are fixedly connected to the front of the middle section support ring, and several middle section ball rods are fixedly connected to the rear of the middle section support ring.

[0015] By adopting the above technical solution, several middle section components are used to form the catheter body, forming multiple motion sections. Adjacent middle section components are connected using middle section ball covers and middle section ball rods. When the device is tightened, it can form a fixed whole. When loosened, it can bend and deform, combining flexibility and connection rigidity. When inserted into the human body, the middle section component is restricted in bending in the body and is not easy to bend.

[0016] Preferably, the front section assembly includes a front section outer tube, a front section inner tube, a front section support ring, a front section inner seat, a front section guide shaft, a front section ball rod and a catheter head. The front section inner tube is installed on the inner side of the front section outer tube, and the front section support ring is fixedly connected between the front section outer tube and the front section inner tube. A plurality of front section inner seats are fixedly connected to the circumferential surface of the front section inner tube, and the front section guide shaft is connected to the interior of the front section inner seat in rotation. A plurality of front section ball rods are fixedly connected to the rear of the front section support ring, and the catheter head is fixedly connected to the front of the front section support ring.

[0017] By adopting the above technical solution, the front section assembly facilitates the extension of the cannula from the inside. When the front section assembly turns, the catheter head faces different directions, which facilitates guiding the cannula to different positions and directions. The cannula extends from the catheter head, facilitating interventional treatment.

[0018] Preferably, a connecting outer tube is fixedly connected between the adjacent rear section outer tube, middle section outer tube and front section outer tube, a connecting inner tube is fixedly connected between the adjacent rear section inner tube, middle section inner tube and front section inner tube, the rear section ball cover, middle section ball cover, middle section ball rod and front section ball rod are all located between the connecting outer tube and the connecting inner tube, the rear section ball cover and the middle section ball rod are clamped together front and back, the middle section ball cover and the middle section ball rod in the adjacent middle section assembly are clamped together front and back, and the front section ball rod and the middle section ball cover are clamped together front and back.

[0019] Preferably, the connecting outer tube and the connecting inner tube are both made of TPU material.

[0020] By adopting the above technical solution, the outer tube and the inner tube are connected to connect the rear section assembly, the middle section assembly and the front section assembly together, forming a complete pipe surface inside and outside, which can bend and deform with adjustment, and protect the internal middle section ball cover and middle section ball rod, so that the intubation can be easily reached to the target position when the intubation is inserted.

[0021] Preferably, a steel wire is installed inside the rear section assembly, the middle section assembly and the front section assembly, the front end of the steel wire is fixedly connected to the front section support ring at the front end, and is wound backward on the front section guide shaft, the middle section guide shaft and the rear section guide shaft in sequence, and the front end of the steel wire passes through the limiting ring and passes around the outer guide shaft before being fixed on the winding shaft.

[0022] By adopting the above technical solution, the steel wire is wound around the front section guide shaft, the middle section guide shaft, the rear section guide shaft and the outer guide shaft from front to back in sequence. When the reel is rotated, the corresponding steel wire can be reeled in. Correspondingly, the front end of the front section assembly will produce a corresponding bend, thereby facilitating the insertion of the device into the complex human body.

[0023] (3) Beneficial effects The present invention provides a controllable bending catheter for interventional therapy, which has the following beneficial effects: 1) When in use, the front section assembly is inserted into the human body, and there is no forced connection between the front section assembly, the middle section assembly and the rear section assembly, which is convenient for insertion in accordance with the human body structure. After insertion, the adjustment assembly and the large fastening ring can be rotated to tighten the steel wire. Under the action of the steel wire, the front section assembly, the middle section assembly and the rear section assembly enter a forced connection state, forming a whole, which is convenient for subsequent operation.

[0024] 2) When the device enters the forced connection state, the adjustment component can be rotated to make the rotating ball rotate inside the stabilizing ring, thereby rotating and adjusting the steel wire connected to the rotating ring. Different rotation angles will have different tensile forces on the steel wire at different points. By coordinating the loose and tight external reel, the front section component, middle section component and rear section component can be bent to different degrees through the steel wire, thereby achieving controllable bending of the catheter.

[0025] 3) The front section assembly, the middle section assembly and the rear section assembly are all connected by a ball rod and a ball cover. Under the pull of the steel wire, they can turn in different directions with high flexibility. After completing the controlled bending, the state can be fixed under the action of the external fastening ring, with strong stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the front view of the present invention; Figure 2 Schematic diagram of the cross-sectional structure of the regulating assembly of the present invention; Figure 3 for Figure 2 A magnified view of middle A; Figure 4 It is a schematic diagram of the cross-sectional structure of the stabilizing assembly of the present invention; Figure 5 Schematic diagram of the cross-sectional structure of the rear section assembly of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the middle section assembly of the present invention; Figure 7 Schematic diagram of the cross-sectional structure of the front section assembly of the present invention; Figure 8 The present invention is a three-dimensional Figure 1 ; Figure 9 The present invention is a three-dimensional Figure 2 ; Figure 10 This is a three-dimensional diagram of the cross-sectional structure of the stabilizing component of the present invention.

[0027] Among them, 1. Intubation; 2. Adjustment assembly; 3. Large fastening ring; 4. Stabilization assembly; 5. Rear section assembly; 6. Middle section assembly; 7. Connecting outer tube; 8. Connecting inner tube; 9. Front section assembly; 10. Steel wire; 201, rotating ball; 202, adjusting disk; 203, pipe hole; 204, front ring; 205, clamping groove; 206, rotating ring; 207, inner hole; 208, outer guide shaft; 209, clamping ring; 401, stabilizing ring; 402, limiting ring; 403, front hole; 404, rear tube; 405, external mounting seat; 406, reel; 407, external fastening ring; 501, rear section outer tube; 502, rear section inner tube; 503, rear section support ring; 504, rear section inner seat; 505, rear section guide shaft; 506, rear section ball cover; 601, middle section outer tube; 602, middle section inner tube; 603, middle section support ring; 604, middle section inner seat; 605, middle section guide shaft; 606, middle section ball cover; 607, middle section ball rod; 901, front section outer tube; 902, front section inner tube; 903, front section support ring; 904, front section inner seat; 905, front section guide shaft; 906, front section ball shaft; 907, catheter head. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figures 1 to 10The present invention provides a technical solution: a controllable bending catheter for interventional treatment, comprising a cannula 1, an adjusting component 2 installed on the cannula 1, a large fastening ring 3 threadedly connected to the front of the adjusting component 2, a stabilizing component 4 threadedly connected to the front of the large fastening ring 3, a rear section component 5 fixedly installed in front of the stabilizing component 4, a plurality of middle section components 6 installed in front of the rear section component 5, connecting outer tubes 7 and connecting inner tubes 8 installed between adjacent middle section components 6, and a front section component 9 installed in front of the frontmost connecting outer tube 7 and connecting inner tube 8.

[0030] The adjusting assembly 2 includes a rotating ball 201, an adjusting disk 202, a tube hole 203, a front ring 204, a clamping groove 205, a rotating ring 206, an inner hole 207, an outer guide shaft 208 and a clamping ring 209. The adjusting disk 202 is fixedly connected to the rear side wall of the rotating ball 201. The interior of the rotating ball 201 is provided with a tube hole 203 for facilitating the insertion of the cannula 1. The front ring 204 is clamped on the rotating ball 201. A clamping groove 205 is provided on the spherical surface of the rotating ball 201. The interior of the clamping groove 205 is installed with a rotating ring 206. Several inner holes 207 are provided on the circumferential surface of the rotating ring 206. The interior of the inner hole 207 is rotatably connected to the outer guide shaft 208. The inner side of the rotating ring 206 is fixedly connected to the clamping ring 209.

[0031] The adjusting disk 202 can operate the rotation direction and angle of the rotating ball 201 inside the front ring 204. The rotating ring 206 is connected to the spherical surface of the rotating ball 201. The snap ring 209 allows the rotating ring 206 to rotate on the rotating ball 201 or rotate with the rotating ball 201, which is highly flexible.

[0032] The stabilizing assembly 4 includes a stabilizing ring 401, a limiting ring 402, a front hole 403, a rear tube 404, an external mounting seat 405, a winding shaft 406 and an external fastening ring 407. Several limiting rings 402 are fixedly connected to the inner front side wall of the stabilizing ring 401, a front hole 403 is opened on the front side wall of the stabilizing ring 401, a rear tube 404 is fixedly connected to the rear side wall of the stabilizing ring 401, and several external mounting seats 405 are fixedly connected to the rear side wall of the stabilizing ring 401. The internal rotation of the external mounting seat 405 is connected to the winding shaft 406, and the left and right ends of the winding shaft 406 are threadedly connected with the external fastening rings 407. The external fastening ring 407 is located on the outside of the external mounting seat 405.

[0033] The limiting ring 402 is used to limit the rotating ball 201. The winding shaft 406 is connected to the front end of the steel wire 10 and is used to wind up the steel wire 10. By twisting the outer fastening rings 407 on both sides, the winding shaft 406 can be limited and fixed inside the outer mounting seat 405 to lock the winding shaft 406.

[0034] The front of the large fastening ring 3 is threadedly connected to the front ring 204 , and the rear of the large fastening ring 3 is threadedly connected to the rear tube 404 .

[0035] By rotating the front ring 204 , the adjustment assembly 2 can be moved forward and backward along the large fastening ring 3 . When the adjustment assembly 2 is moved to a suitable position, the large fastening ring 3 can be used to lock the front ring 204 and the rear tube 404 , thereby fixing the position of the front ring 204 .

[0036] The rear section assembly 5 includes a rear section outer tube 501, a rear section inner tube 502, a rear section support ring 503, a rear section inner seat 504, a rear section guide shaft 505 and a rear section ball cover 506. The rear section inner tube 502 is installed on the inner side of the rear section outer tube 501. Both the rear section outer tube 501 and the rear section inner tube 502 are fixedly connected to the stabilizing ring 401. The rear section support ring 503 is fixedly connected between the rear section outer tube 501 and the rear section inner tube 502. Several rear section inner seats 504 are fixedly connected to the circumferential surface of the rear section inner tube 502. The rear section inner seat 504 is internally rotatably connected to the rear section guide shaft 505. Several rear section ball covers 506 are fixedly connected to the front of the front rear section support ring 503.

[0037] The rear section assembly 5 is fixedly connected to the stabilizing assembly 4 at the rear end, and the front end is connected to the middle section assembly 6 through the rear section ball cover 506 , and the steel wire 10 is wound around the rear section guide shaft 505 .

[0038] The middle section assembly 6 includes a middle section outer tube 601, a middle section inner tube 602, a middle section support ring 603, a middle section inner seat 604, a middle section guide shaft 605, a middle section ball cover 606 and a middle section ball rod 607. The middle section inner tube 602 is installed on the inner side of the middle section outer tube 601. Two middle section support rings 603 are fixedly connected between the middle section outer tube 601 and the middle section inner tube 602. Several middle section inner seats 604 are fixedly connected to the circumferential surface of the middle section inner tube 602. The inner part of the middle section inner seat 604 is rotatably connected to the middle section guide shaft 605. Several middle section ball covers 606 are fixedly connected to the front of the front middle section support ring 603, and several middle section ball rods 607 are fixedly connected to the rear of the rear middle section support ring 603.

[0039] Several middle section components 6 are used to form the catheter body, forming multiple motion sections. Adjacent middle section components 6 are connected using middle section ball covers 606 and middle section ball rods 607. When the device is tightened, it can form a fixed whole. When loosened, it can bend and deform, combining flexibility and connection rigidity. When inserted into the human body, the middle section component 6 is limited in bending in the body and is not easy to bend.

[0040] The front section assembly 9 includes a front section outer tube 901, a front section inner tube 902, a front section support ring 903, a front section inner seat 904, a front section guide shaft 905, a front section ball rod 906 and a catheter head 907. The front section inner tube 902 is installed on the inner side of the front section outer tube 901. The front section support ring 903 is fixedly connected between the front section outer tube 901 and the front section inner tube 902. Several front section inner seats 904 are fixedly connected to the circumferential surface of the front section inner tube 902. The front section inner seat 904 is internally rotatably connected to the front section guide shaft 905. Several front section ball rods 906 are fixedly connected to the rear of the rear front section support ring 903, and the catheter head 907 is fixedly connected to the front of the front section support ring 903.

[0041] The front section assembly 9 facilitates the extension of the cannula 1 from the inside. When the front section assembly 9 turns, the catheter head 907 faces different directions, which facilitates guiding the cannula 1 to different positions and directions. The cannula 1 extends from the catheter head 907, facilitating interventional treatment.

[0042] A connecting outer tube 7 is fixedly connected between the adjacent rear section outer tubes 501, the middle section outer tube 601 and the front section outer tube 901, and a connecting inner tube 8 is fixedly connected between the adjacent rear section inner tubes 502, the middle section inner tube 602 and the front section inner tube 902. The connecting outer tube 7 and the connecting inner tube 8 are both made of TPU material. The rear section ball cover 506, the middle section ball cover 606, the middle section ball rod 607 and the front section ball rod 906 are all located between the connecting outer tube 7 and the connecting inner tube 8. The rear section ball cover 506 and the middle section ball rod 607 are clamped together front to back. The middle section ball cover 606 and the middle section ball rod 607 in the adjacent middle section assembly 6 are clamped together front to back, and the front section ball rod 906 and the middle section ball cover 606 are clamped together front to back.

[0043] The connecting outer tube 7 and the connecting inner tube 8 connect the rear section assembly 5, the middle section assembly 6 and the front section assembly 9 together, forming a complete pipeline surface inside and outside, which can be bent and deformed according to adjustment, and provide protection for the internal middle section ball cover 606 and the middle section ball rod 607, so that when the cannula 1 is inserted, it is convenient for the cannula 1 to reach the target position directly.

[0044] A steel wire 10 is installed inside the rear section assembly 5, the middle section assembly 6 and the front section assembly 9. The front end of the steel wire 10 is fixedly connected to the front section support ring 903 at the front end, and is wound backward on the front section guide shaft 905, the middle section guide shaft 605 and the rear section guide shaft 505 in sequence. The front end of the steel wire 10 passes through the limit ring 402 and passes around the outer guide shaft 208 before being fixed on the winding shaft 406.

[0045] The steel wire 10 is wound around the front section guide shaft 905, the middle section guide shaft 605, the rear section guide shaft 505 and the outer guide shaft 208 from front to back in sequence. When the reel 406 is rotated, the corresponding steel wire 10 can be reeled in. Correspondingly, the front end of the front section component 9 will produce a corresponding bend, thereby facilitating the insertion of the device into the complex human body.

[0046] Working principle: When in use, the front section component 9 is inserted into the human body, and there is no forced connection between the front section component 9, the middle section component 6 and the rear section component 5, and they can be inserted according to the human body structure. After insertion, the front ring 204 is rotated to make the front ring 204 away from the rear tube 404, until the front section component 9, the middle section component 6 and the rear section component 5 are forced to be connected under the action of the steel wire 10 and form a whole with each other, and then the large fastening ring 3 is rotated to lock the front ring 204 and the rear tube 404. At this time, the rotating ball 201 can be rotated by the adjusting disk 202. When the rotating ball 201 rotates, the steel wires 10 around it will be pulled to different degrees, and the adjusting disk 202 will turn to one side, and the front end of the front section component 9 will bend in the opposite direction, so that the front section component 9 can be adjusted. Active steering enables controllable bending, making it easier for the device to continue to penetrate the human body. The middle section of the device is not easily deformed under the constraints of the human body, and the front section component 9 is easier to bend during operation. When it is necessary to penetrate in different directions, it is only necessary to operate the adjustment disk 202 until it reaches the target position, and then screw the outer fastening rings 407 around it to lock the winding shaft 406 to fix the final orientation of the front section component 9. Then, the cannula 1 is inserted from the tube hole 203 in the rotating ball 201, and continues to penetrate along the rear section component 5, the middle section component 6, the connecting inner tube 8 and the front section component 9, and finally extends from the catheter head 907 to reach the target position for interventional treatment. The device has high operational flexibility and low operational difficulty. It is not easy to bend again after the state is fixed, and has strong stability.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A controllable bendable catheter for interventional therapy, comprising a cannula (1), characterized in that: The cannula (1) is provided with an adjusting assembly (2), a large fastening ring (3) is threadedly connected to the front of the adjusting assembly (2), a stabilizing assembly (4) is threadedly connected to the front of the large fastening ring (3), a rear section assembly (5) is fixedly installed in front of the stabilizing assembly (4), a plurality of middle section assemblies (6) are installed in front of the rear section assembly (5), connecting outer tubes (7) and connecting inner tubes (8) are installed between adjacent middle section assemblies (6), and a front section assembly (9) is installed in front of the connecting outer tube (7) and the connecting inner tube (8) at the front.

2. The controllable bendable catheter for interventional therapy according to claim 1, characterized in that: The adjusting assembly (2) comprises a rotating ball (201), an adjusting disk (202), a tube hole (203), a front ring (204), a clamping groove (205), a rotating ring (206), an inner hole (207), an outer guide shaft (208) and a clamping ring (209). The adjusting disk (202) is fixedly connected to the rear side wall of the rotating ball (201). The interior of the rotating ball (201) is provided with a tube hole (203) for facilitating the insertion of the cannula (1). The front ring (204) is clamped on the rotating ball (201). The spherical surface of the rotating ball (201) is provided with a clamping groove (205). The interior of the clamping groove (205) is provided with a rotating ring (206). The circumferential surface of the rotating ring (206) is provided with a plurality of inner holes (207). The interior of the inner hole (207) is rotatably connected to the outer guide shaft (208). The inner side of the rotating ring (206) is fixedly connected with the clamping ring (209).

3. The controllable bendable catheter for interventional therapy according to claim 2, characterized in that: The stabilizing assembly (4) comprises a stabilizing ring (401), a limiting ring (402), a front hole (403), a rear tube (404), an external mounting seat (405), a reeling shaft (406) and an external fastening ring (407), wherein a plurality of limiting rings (402) are fixedly connected to the inner front side wall of the stabilizing ring (401), a front hole (403) is provided on the front side wall of the stabilizing ring (401), a rear tube (404) is fixedly connected to the rear side wall of the stabilizing ring (401), a plurality of external mounting seats (405) are fixedly connected to the rear side wall of the stabilizing ring (401), the internal portion of the external mounting seat (405) is rotatably connected to the reeling shaft (406), the left and right ends of the reeling shaft (406) are threadedly connected to the external fastening ring (407), and the external fastening ring (407) is located on the outer side of the external mounting seat (405).

4. The controllable bendable catheter for interventional therapy according to claim 3, characterized in that: The front of the large fastening ring (3) is threadedly connected to the front ring (204), and the rear of the large fastening ring (3) is threadedly connected to the rear tube (404).

5. The controllable bendable catheter for interventional therapy according to claim 1, characterized in that: The rear section assembly (5) comprises a rear section outer tube (501), a rear section inner tube (502), a rear section support ring (503), a rear section inner seat (504), a rear section guide shaft (505) and a rear section ball cover (506). The rear section inner tube (502) is installed on the inner side of the rear section outer tube (501). Both the rear section outer tube (501) and the rear section inner tube (502) are fixedly connected to the stabilizing ring (401). The rear section support ring (503) is fixedly connected between the rear section outer tube (501) and the rear section inner tube (502). A plurality of rear section inner seats (504) are fixedly connected to the circumferential surface of the rear section inner tube (502). The rear section guide shaft (505) is rotatably connected inside the rear section inner seat (504). A plurality of rear section ball covers (506) are fixedly connected in front of the rear section support ring (503).

6. The controllable bendable catheter for interventional therapy according to claim 5, characterized in that: The middle section assembly (6) comprises a middle section outer tube (601), a middle section inner tube (602), a middle section support ring (603), a middle section inner seat (604), a middle section guide shaft (605), a middle section ball cover (606) and a middle section ball rod (607). The middle section inner tube (602) is installed on the inner side of the middle section outer tube (601). Two middle section support rings (603) are fixedly connected between the middle section outer tube (601) and the middle section inner tube (602). A plurality of middle section inner seats (604) are fixedly connected to the circumferential surface of the middle section inner tube (602). The middle section guide shaft (605) is rotatably connected to the interior of the middle section inner seat (604). A plurality of middle section ball covers (606) are fixedly connected to the front of the middle section support ring (603) in front, and a plurality of middle section ball rods (607) are fixedly connected to the rear of the middle section support ring (603) in the rear.

7. The controllable bendable catheter for interventional therapy according to claim 6, characterized in that: The front section assembly (9) comprises a front section outer tube (901), a front section inner tube (902), a front section support ring (903), a front section inner seat (904), a front section guide shaft (905), a front section ball rod (906) and a catheter head (907). The front section inner tube (902) is installed on the inner side of the front section outer tube (901), the front section support ring (903) is fixedly connected between the front section outer tube (901) and the front section inner tube (902), a plurality of front section inner seats (904) are fixedly connected on the circumferential surface of the front section inner tube (902), the interior of the front section inner seat (904) is rotatably connected to the front section guide shaft (905), a plurality of front section ball rods (906) are fixedly connected to the rear of the rear front section support ring (903), and the catheter head (907) is fixedly connected to the front of the front section support ring (903).

8. The controllable bendable catheter for interventional therapy according to claim 7, characterized in that: A connecting outer tube (7) is fixedly connected between the adjacent rear section outer tubes (501), the middle section outer tubes (601) and the front section outer tubes (901); a connecting inner tube (8) is fixedly connected between the adjacent rear section inner tubes (502), the middle section inner tubes (602) and the front section inner tubes (902); the rear section ball cover (506), the middle section ball cover (606), the middle section ball rod (607) and the front section ball rod (906) are all located between the connecting outer tube (7) and the connecting inner tube (8); the rear section ball cover (506) and the middle section ball rod (607) are clamped together in front and back; the middle section ball cover (606) and the middle section ball rod (607) in the adjacent middle section assembly (6) are clamped together in front and back; and the front section ball rod (906) and the middle section ball cover (606) are clamped together in front and back.

9. The controllable bendable catheter for interventional therapy according to claim 7, characterized in that: The connecting outer tube (7) and the connecting inner tube (8) are both made of TPU material.

10. The controllable bendable catheter for interventional treatment according to claim 7, characterized in that: A steel wire (10) is installed inside the rear section assembly (5), the middle section assembly (6) and the front section assembly (9), the front end of the steel wire (10) is fixedly connected to the front section support ring (903) at the front end, and is wound backwards on the front section guide shaft (905), the middle section guide shaft (605) and the rear section guide shaft (505) in sequence, and the front end of the steel wire (10) passes through the limit ring (402) and passes around the outer guide shaft (208) and is then fixed on the reeling shaft (406).

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