Ablation catheter advancement device

Abstract

The present invention relates to the field of medical device technology, and specifically to an ablation catheter propulsion device. The specific technical solution is: an ablation catheter propulsion device, comprising a trumpet-shaped adsorption cover, a fixed cylinder is arranged on the top of the adsorption cover, an arc-shaped hole is opened on the side wall of the fixed cylinder, a catheter penetrating the fixed cylinder and the adsorption cover is arranged in the fixed cylinder, an internal hollow movable worm is rotatably arranged on the catheter in the fixed cylinder corresponding to the arc-shaped hole, a driving assembly for driving the movable worm to rotate is arranged on the inner wall of the fixed cylinder, and a rotating ring matched with the driving assembly is sleeved on the outer wall of the fixed cylinder at the position of the arc-shaped hole. The present invention solves the problem in the prior art that it is impossible to accurately control the contact between the electrode on the catheter and the lesion site.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an ablation catheter propulsion device. Background Art

[0002] Microwave ablation involves the use of high-frequency electromagnetic waves to treat a variety of conditions, including tumors in or on organs such as the liver, brain, lungs and kidneys. When treating lesions in these areas, a catheter is inserted directly into the lesion and then treated under the influence of the microwave field.

[0003] During the treatment process, the doctor generally manually operates the electrode on the catheter to contact the lesion site, thereby performing ablation treatment. However, the doctor's operation of the catheter to contact the lesion site depends largely on the doctor's clinical experience. For doctors who are not experienced, it is impossible to accurately control the contact between the catheter and the lesion site when operating the catheter. Therefore, in view of the above problems, the present invention discloses a catheter propulsion device. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides an ablation catheter propulsion device, which solves the problem in the prior art that the electrodes on the catheter cannot be accurately controlled to contact with the lesion site.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention discloses an ablation catheter propulsion device, comprising a trumpet-shaped adsorption cover, a fixed cylinder is arranged on the top of the adsorption cover, an arc-shaped hole is opened on the side wall of the fixed cylinder, a catheter penetrating the fixed cylinder and the adsorption cover is arranged in the fixed cylinder, an internal hollow movable worm is rotatably arranged on the catheter in the fixed cylinder corresponding to the arc-shaped hole, a driving component for driving the movable worm to rotate is arranged on the inner wall of the fixed cylinder, and a rotating ring matching the driving component is sleeved on the outer wall of the fixed cylinder at the position of the arc-shaped hole.

[0007] Preferably, an inner gear ring is provided in the inner ring of the rotating ring, an annular support plate is provided at the bottom of the rotating ring, a positioning cylinder is provided at the bottom of the support plate, a limiting protrusion is provided on the inner wall of the positioning cylinder, an annular limiting groove corresponding to the limiting protrusion is provided on the outer wall of the fixed cylinder, and the limiting protrusion is placed in the limiting groove.

[0008] Preferably, the driving assembly includes a lifting ring arranged on the inner wall of the fixed cylinder, a driving rod is arranged through the lifting ring, one end of the fixed rod is supported on the lifting ring through a baffle, and the other end is provided with a fixed worm meshing with the worm teeth on the movable worm; the driving rod is provided with a gear set driven by an inner gear ring.

[0009] Preferably, the gear set includes a fixed gear fixed on the driving rod, and a movable gear meshing with the fixed gear and the internal gear ring is arranged between the fixed gear and the internal gear ring. The movable gear is rotatably arranged on the fixed rod through a connecting rod.

[0010] Preferably, the connecting rod is in an "┏" shape. Its horizontal part is sleeved on the fixed rod and rotatably connected. The vertical part penetrates through the axis of the movable gear and is rotatably connected to the movable gear. A backing plate is arranged at the end of the vertical part of the connecting rod extending out of the movable gear. The top of the connecting rod is fixed to the inner top of the arc-shaped hole through a fixing column.

[0011] Preferably, an auxiliary worm is rotatably arranged in the fixed cylinder through a "匚"-shaped support frame. The auxiliary worm and the fixed worm are in the same plane.

[0012] Preferably, a circle of balls rotating on the inner wall of the movable worm are respectively arranged on the inner walls of the movable worm near its two ends. The balls are in contact with the outer wall of the conduit.

[0013] Preferably, a circle of air bags is arranged inside the adsorption cover near its connection with the fixed cylinder. Air pipes respectively communicating with the air bags and the inside of the adsorption cover are arranged on the outer wall of the adsorption cover. The other ends of the two air pipes are connected to a valve assembly. The other side of the valve assembly is communicated with a hose, and a vacuum pump is connected to the hose.

[0014] Preferably, the valve assembly includes a valve body and a pipeline penetrating through the valve body. A main pipeline communicating with the pipeline is arranged on one side of the valve body. One ends of the two air pipes are respectively connected to the two ends of the pipeline. A control member for controlling the opening and closing of the two air pipes is arranged on the valve body.

[0015] Preferably, the control member includes a support frame arranged on one side of the valve body. A support rod parallel to the pipeline is rotatably connected to the support frame through a rotating shaft. Sealing plates are hinged to both ends of the support rod. The sealing plates are inserted into the valve body and extend into the pipeline.

[0016] The present invention has the following beneficial effects:

[0017] Through the adsorption cover and the air bags arranged inside the adsorption cover, the adsorption cover is fixed on the human body and the traction syringe left outside the human body after being inserted is fixed. Then, a movable worm is rotatably connected to the conduit inserted into the fixed cylinder, and the movable worm is driven by a fixed worm arranged in the fixed cylinder, so as to control the length of the conduit extending into the human body, and further accurately control the position of the electrode on the conduit reaching the lesion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 for Figure 1 Middle AA view;

[0020] Figure 3 It is a schematic diagram of the connection structure between the fixed cylinder and the adsorption hood;

[0021] Figure 4 is a schematic diagram of the rotating ring structure;

[0022] Figure 5 It is a schematic diagram of the structure of the movable worm;

[0023] Figure 6 It is a schematic diagram of the drive component structure;

[0024] Figure 7 It is a schematic diagram of the valve assembly structure;

[0025] Figure 8 for Figure 7 Middle BB view;

[0026] In the figure: adsorption cover 1, fixed cylinder 2, arc hole 3, conduit 4, movable worm 5, rotating ring 6, inner ring gear 7, support plate 8, positioning cylinder 9, limiting protrusion 10, limiting groove 11, lifting ring 12, driving rod 13, fixed worm 14, fixed gear 15, movable gear 16, connecting rod 17, pad 18, fixed column 19, support frame 20, auxiliary worm 21, ball 22, airbag 23, air pipe 24, hose 25, valve body 26, pipeline 27, main pipeline 28, bracket 29, support rod 30, sealing plate 31, baffle 32, insertion column 33. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0028] Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0029] refer to Figure 1-Figure 8The present invention discloses an ablation catheter propulsion device, including a trumpet-shaped adsorption cover 1, which is made of rubber and is used to be adsorbed on the surface of the human body, so as to fix the propulsion device. A fixed cylinder 2 is arranged on the top of the adsorption cover 1, and the interior of the fixed cylinder 2 is hollow and communicated with the adsorption cover. An arc-shaped hole 3 is opened on the side wall of the fixed cylinder 2. A catheter 4 that passes through the fixed cylinder 2 and the adsorption cover 1 is arranged in the fixed cylinder 2. The catheter 4 is an ablation catheter, which passes through the fixed cylinder 2 and the adsorption cover 1 in sequence until it is inserted into the human body. The specific structure of the adsorption cover 1 adsorbed on the human body is as follows: a circle of air bags 23 is arranged in the adsorption cover 1, near the connection between it and the fixed cylinder 2, and an air pipe 24 that is respectively connected to the air bag 23 and the adsorption cover 1 is arranged on the outer wall of the adsorption cover 1. The other ends of the two air pipes 24 are connected to the valve assembly, and the other side of the valve assembly is connected to a hose 25, and a vacuum pump is connected to the hose 25. The vacuum pump is a dual-purpose vacuum pump for exhaust and blowing. When blowing, the air pipe connected to the airbag 23 is connected to the hose 25 by adjusting the valve assembly, and the vacuum pump is turned on to blow air into the airbag 23 so that the inner ring of the airbag is fixed at the tube mouth of the traction syringe ( Figure 1 The dotted line in the figure represents the traction syringe), thereby achieving the purpose of fixing the traction syringe. Then, the air pipe connected to the adsorption hood 1 is connected to the hose 25 by adjusting the valve assembly, and the vacuum pump is turned on to extract the air in the adsorption hood. Since the traction syringe is fixed to the air bag, a closed space is formed in the adsorption hood. When the air in the adsorption hood is extracted, the adsorption hood is adsorbed on the human body, thereby completing the fixation of the adsorption hood and the traction syringe. When the vacuum pump is disconnected from the hose, a sealing plug is inserted at the end of the hose to prevent air from entering the adsorption hood or the air in the air bag from escaping.

[0030] Specifically: the valve assembly includes a valve body 26 and a pipeline 27 that runs through the valve body 26. The pipeline 27 runs through the center of the length direction of the valve body 26. A main pipeline 28 that communicates with the pipeline 27 is provided on one side of the valve body 26. The pipe opening of the main pipeline 28 that extends into the valve body 26 is preferably provided at the center of the pipeline 27. One end of the two air pipes 24 is respectively connected to the two ends of the pipeline 27. The valve body 26 is provided with a control component that controls the opening and closing of the two air pipes 24. It should be noted that: the two ends of the pipeline 27 are respectively connected to an air pipe 24, and the other ends of the two air pipes are respectively connected to the air bag 23 and the adsorption cover 1. The control component controls whether the main pipeline 28 is connected to the air pipe that communicates with the air bag or the air pipe that communicates with the adsorption cover.

[0031] Specifically, the control part includes a bracket 29 arranged on one side of the valve body 26, and a support rod 30 parallel to the pipeline 27 is rotatably connected to the bracket 29 through a rotating shaft, and sealing plates 31 are hinged at both ends of the support rod 30, and the sealing plates 31 are inserted into the valve body 26 and extend into the pipeline 27. It should be noted that the sealing plate 31 is rotatably connected to both ends of the support rod 30 through a rotating shaft, and a hole for inserting the sealing plate is provided in the valve body, and the hole is adapted to the sealing plate, so as to prevent gas from escaping from the hole. The sealing plate can close the pipeline 27, thereby controlling the communication between different air pipes and hoses. Figure 7 The state shown in the middle sealing plate is that the passages connected to the two air pipes are closed. It is only necessary to press one end of the support rod 30 to break the balance of the support rod, so as to open one of the pipes connected to the air pipe, thereby realizing the inflation of the airbag and the degassing of the adsorption cover.

[0032] Furthermore, in order to facilitate the connection between the air pipe and the hose and the valve body, an insertion column 33 is fixed at both ends of the pipeline 27 and the outlet of the main pipeline 28. The insertion column 33 is hollow inside and communicates with the pipeline and the main pipeline. A clamping platform is provided on the circumference of the insertion column 33, so as to fix the air pipe and the hose to the valve body well.

[0033] Furthermore, a hollow movable worm 5 is rotatably arranged on the conduit 4 corresponding to the arc-shaped hole 3 in the fixed cylinder 2, a driving assembly for driving the movable worm 5 to rotate is arranged on the inner wall of the fixed cylinder 2, and a rotating ring 6 cooperating with the driving assembly is sleeved on the outer wall of the fixed cylinder 2 at the position of the arc-shaped hole 3. The conduit 4 and the movable worm 5 are connected in the following manner: the conduit 4 passes through the axis of the movable worm 5 and is arranged away from the inner wall of the movable worm 5. The inner walls of the movable worm 5 near both ends are respectively provided with a circle of balls 22 rotating on the inner wall of the movable worm 5, and the balls 22 are against the outer wall of the conduit 4. That is, the balls 22 can rotate on the inner wall of the movable worm 5, and at the same time, the balls 22 are in contact with the outer wall of the conduit 4. When the movable worm 5 rotates, under the action of the balls 22, the conduit 4 does not rotate, but drives the conduit 4 to move in the vertical direction. The length of the movable worm is set according to actual needs.

[0034] Further, an inner gear ring 7 is provided in the inner ring of the rotating ring 6, an annular support plate 8 is provided at the bottom of the rotating ring 6, a positioning cylinder 9 is provided at the bottom of the support plate 8, a limiting protrusion 10 is provided on the inner wall of the positioning cylinder 9, and an annular limiting groove 11 corresponding to the limiting protrusion 10 is provided on the outer wall of the fixed cylinder 2, and the limiting protrusion 10 is placed in the limiting groove 11. It should be noted that the rotating ring 6, the support plate 8 and the positioning cylinder 9 are all sleeved on the fixed cylinder 2, and the inner gear ring 7 on the rotating ring 6 corresponds to the arc hole 3. When the rotating ring rotates, the limiting protrusion 10 rotates along the limiting groove 11, thereby preventing the rotating ring from moving in the vertical direction of the fixed cylinder, thereby achieving the purpose of fixing the rotating ring 6 on the fixed cylinder 2. The inner gear ring on the rotating ring is meshed with the driving component, so that the driving component drives the movable worm 5 to rotate, and then drives the catheter 4 to move up and down, controls the length of the catheter extending into the human body, and enables the electrode on the catheter to accurately reach the lesion site.

[0035] Specifically, the driving assembly includes a lifting ring 12 arranged on the inner wall of the fixed cylinder 2, the lifting ring 12 is arranged above the arc hole 3, and a driving rod 13 is arranged through the lifting ring 12, and the driving rod 13 is arranged parallel to the movable worm 5. One end of the driving rod 13 passing through the lifting ring 12 is supported on the lifting ring 12 through a baffle 32, that is, the baffle 32 is against the top of the lifting ring 12, so as to prevent the driving rod 13 from falling. The other end of the driving rod 13 is fixedly provided with a fixed worm 14 meshing with the worm teeth on the movable worm 5; the driving rod 13 is provided with a gear set driven by the inner gear ring 7.

[0036] Specifically, the gear set includes a fixed gear 15 fixed on the driving rod 13, the fixed gear 15 is arranged above the fixed worm 14, and a movable gear 16 is arranged between the fixed gear 15 and the inner gear ring 7, which is respectively meshed with the fixed gear 15 and the inner gear ring 7, and the movable gear 16 is rotatably arranged on the driving rod 13 through a connecting rod 17. The movable gear 16 is respectively meshed with the inner gear ring 7 and the fixed gear 15. When the rotating ring 6 is rotated, the movable gear 16 is driven to rotate, and the movable gear 16 drives the fixed gear 15 to rotate, and the fixed gear 15 drives the driving rod 13 and the fixed worm 14 fixed on the driving rod 13 to rotate, thereby driving the movable worm 5 to rotate. During the rotation of the movable worm 5, the catheter 4 is driven to rise and fall, thereby achieving the purpose of controlling the rise and fall of the catheter, so that medical staff can drive the electrode on the catheter to the lesion site by operating the rotating ring.

[0037] Among them, the connecting rod 17 is in an "┏" shape. Its horizontal part is sleeved on the driving rod 13 and rotatably connected. That is, through holes are provided on the horizontal part of the connecting rod 17. The driving rod 13 passes through these through holes and is arranged separately. The vertical part of the connecting rod 17 penetrates through the axis of the movable gear 16 and is rotatably connected to the movable gear 16. A backing plate 18 is provided at the bottom end of the vertical part of the connecting rod 17 extending out of the movable gear 16 to prevent the movable gear 16 from falling off. The top (horizontal part) of the connecting rod 17 is fixed to the inner top of the arc-shaped hole 3 through a fixing column 19, thereby fixing the connecting rod 17.

[0038] Furthermore, an auxiliary worm 21 is rotatably arranged in the fixing cylinder 2 through a "匚"-shaped support frame 20. The auxiliary worm 21 is sleeved on the vertical part of the support frame 20 and rotates on the vertical part. The auxiliary worm 21 meshes with the movable worm 5. The auxiliary worm 21 and the fixed worm 14 are in the same plane. When the movable worm rotates, it will drive the auxiliary worm 21 to rotate. The number of the auxiliary worms 21 is set according to actual needs. At the same time, the purpose of setting the auxiliary worm 21 is to make the catheter or the movable worm 5 always located at the center of the fixing cylinder, and to avoid the adjacent arrangement of the movable worm and the fixed worm.

[0039] When using the present invention, the catheter is passed through the movable worm, passes out from the adsorption cover, and the catheter is inserted into the human blood vessel through the traction syringe. Then, the adsorption cover is fixed on the human body in the above-mentioned disclosed manner, that is, the edge of the traction syringe abuts against the airbag, so as to form a closed space in the adsorption cover. Then the medical staff rotates the rotating ring, thereby adjusting the length of the catheter inserted into the human body, so that the electrode on the catheter reaches the lesion site. It should be noted that: when using the present invention, the medical staff manually inserts the catheter into the human blood vessel through the traction syringe. When the electrode of the catheter is about to reach the lesion, the propulsion device of the present invention is installed, so as to accurately control the electrode to reach the lesion site.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0041] The above-described embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. An ablation catheter propulsion device, comprising a trumpet-shaped adsorption cover (1), characterized in that: A fixing cylinder (2) is provided at the top of the adsorption hood (1). An arc-shaped hole (3) is formed in the side wall of the fixing cylinder (2). A conduit (4) passing through the fixing cylinder (2) and the adsorption hood (1) is arranged in the fixing cylinder (2). An internally hollow movable worm (5) is rotatably arranged on the conduit (4) corresponding to the arc-shaped hole (3) in the fixing cylinder (2). A driving assembly for driving the movable worm (5) to rotate is arranged on the inner wall of the fixing cylinder (2). A rotating ring (6) cooperating with the driving assembly is sleeved on the outer side wall of the fixing cylinder (2) at the position of the arc-shaped hole (3); An internal gear ring (7) is arranged in the inner ring of the rotating ring (6). An annular support plate (8) is arranged at the bottom of the rotating ring (6). A positioning cylinder (9) is arranged at the bottom of the support plate (8). A limiting projection (10) is arranged on the inner wall of the positioning cylinder (9). An annular limiting groove (11) corresponding to the limiting projection (10) is arranged on the outer wall of the fixing cylinder (2). The limiting projection (10) is placed in the limiting groove (11); The driving assembly includes a lifting ring (12) arranged on the inner wall of the fixing cylinder (2). A driving rod (13) passes through the lifting ring (12). One end of the driving rod (13) is supported on the lifting ring (12) through a baffle, and the other end is provided with a fixed worm (14) meshing with the worm teeth on the movable worm (5); A gear set driven by the internal gear ring (7) is arranged on the driving rod (13); The gear set includes a fixed gear (15) fixed on the driving rod (13). A movable gear (16) meshing with the fixed gear (15) and the internal gear ring (7) respectively is arranged between the fixed gear (15) and the internal gear ring (7). The movable gear (16) is rotatably arranged on the driving rod (13) through a connecting rod (17); The connecting rod (17) is in an "┏” shape. Its horizontal part is sleeved on the driving rod (13) and rotatably connected. The vertical part penetrates through the axis of the movable gear (16) and is rotatably connected with the movable gear (16). A cushion plate (18) is arranged at the end of the vertical part of the connecting rod (17) extending out of the movable gear (16). The top of the connecting rod (17) is fixed to the inner top of the arc-shaped hole (3) through a fixing column (19).

2. The ablation catheter propulsion device according to claim 1, characterized in that: An auxiliary worm (21) is rotatably arranged in the fixing cylinder (2) through an "匚”-shaped support frame (20). The auxiliary worm (21) and the fixed worm (14) are in the same plane.

3. The ablation catheter advancement device according to claim 1, characterized in that: A circle of balls (22) rotating on the inner wall of the movable worm (5) are respectively arranged on the inner walls of the movable worm (5) near its two ends. The balls (22) abut against the outer wall of the conduit (4).

4. The ablation catheter propulsion device according to claim 1, characterized in that: A circle of airbags (23) is arranged inside the adsorption hood (1) near the connection between the adsorption hood (1) and the fixed cylinder (2); air pipes (24) are arranged on the outer wall of the adsorption hood (1) and are respectively connected to the airbags (23) and the adsorption hood (1); the other ends of the two air pipes (24) are connected to a valve assembly; the other side of the valve assembly is connected to a hose (25); and the hose (25) is connected to a vacuum pump.

5. The ablation catheter propulsion device according to claim 4, characterized in that: The valve assembly comprises a valve body (26) and a pipeline (27) penetrating the valve body (26); a main pipeline (28) communicating with the pipeline (27) is arranged on one side of the valve body (26); one end of the two air pipes (24) are respectively connected to the two ends of the pipeline (27); and a control component for controlling the opening and closing of the two air pipes (24) is arranged on the valve body (26).

6. The ablation catheter propulsion device according to claim 5, characterized in that: The control component comprises a bracket (29) arranged on one side of the valve body (26); a support rod (30) parallel to the pipeline (27) is rotatably connected to the bracket (29) via a rotating shaft; sealing plates (31) are hinged at both ends of the support rod (30); the sealing plates (31) are inserted into the valve body (26) and extend into the pipeline (27).

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