A vasodilator device

Abstract

The present invention relates to a vascular dilation device, which includes an outer tube, a balloon connected to the distal end of the outer tube, a grasping forceps disposed within the balloon, and a handle connected to the proximal end of the outer tube. The balloon has a shaping region and a deformation region. The deformation region includes a plurality of flaps arranged circumferentially along the shaping region. The plurality of flaps are hinged to the shaping region and can be operatively rotated in a direction away from or close to the axis of the balloon to enable the balloon to switch between an expanded state and a closed state. The grasping forceps are slidably disposed within the balloon along the axial direction of the balloon and have a clamped state and a released state. The balloon of the present invention is a mechanical balloon that can be controlled to open and close. It has greater support force in the expanded state and has a better treatment effect on calcified stenosis. In addition, the balloon is provided with a grasping forceps that can be moved as needed to grasp diseased tissue or foreign matter inside and outside the balloon.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a vasodilator. Background Art

[0002] Balloon angioplasty is an interventional treatment method commonly used to treat vascular stenosis. Traditionally, balloons are inflatable thin-film balloons that are placed at the narrowed part of a blood vessel and then expand to open the narrowed area, squeezing out plaque from the narrowed area and thus dilating the blood vessel.

[0003] Calcified strictures require greater extrusion force, which means more filling medium must be added to the balloon. However, due to the extremely thin wall of thin-film balloons, their tear resistance and bursting pressure are limited. Excessive filling with filling medium can cause the balloon to burst. Even if it doesn't burst, the flexible balloon wall doesn't effectively squeeze the calcified plaque. Therefore, thin-film balloons are ineffective in treating calcified strictures. Summary of the Invention

[0004] The purpose of the present invention is to provide a novel vascular dilator, which has a better treatment effect on calcified stenosis.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The present invention provides a vasodilator, comprising:

[0007] External control;

[0008] a balloon having a shaped region and a deformable region, wherein the shaped region is connected to the distal end of the outer tube, and the deformable region includes a plurality of flaps arranged along the circumference of the shaped region, the plurality of flaps being hinged to the shaped region and operable to rotate in a direction away from or toward the axis of the balloon, so that the balloon can switch between an expanded state and a closed state;

[0009] A grasping forceps is slidably disposed in the balloon along the axial direction of the balloon and has a clamping state and a loosening state;

[0010] The handle includes a shell connected to the proximal end of the outer tube, a balloon opening and closing drive component arranged on the shell and configured to drive the balloon to expand or close, and a grasping forceps drive component configured to slide the grasping forceps and / or drive the grasping forceps to switch between a clamped state and a released state.

[0011] The balloon of this invention features multiple rotatable flaps that expand and close by controlling their rotation. Compared to inflatable thin-film balloons, this balloon offers greater support in its expanded state, providing improved treatment for calcified stenosis. Furthermore, the balloon is equipped with a grasping forceps that can be moved as needed, extending or retracting the balloon to grasp diseased tissue or foreign matter inside or outside the balloon, further enhancing the therapeutic effect.

[0012] Preferably, the flap comprises a first portion and a second portion which are hingedly connected.

[0013] Further preferably, the second portion is located distally of the first portion and comprises a transition region and a gradual transition region. In the closed state, the distance between the transition region and the axis is uniform from proximal to distal, while the gradual transition region is located distally of the transition region and its distance from the axis gradually decreases from proximal to distal. The design of the first and second portions enhances the conformability of the deformable region to the inner wall of the blood vessel and prevents damage to the inner wall of the blood vessel due to excessive expansion of the distal end of the deformable region when it expands outward.

[0014] In some embodiments, the petals are made of nylon.

[0015] Preferably, the balloon also includes a first support rod and a second support rod fixedly connected to the inner sides of the first and second parts of the flap, the first support rod and the first part have the same extension direction and the two ends are hinged to the shaping area and the second support rod respectively.

[0016] Preferably, the shaping area includes a cylindrical sac, a support ring arranged on the inner side of the sac, and a support column connected to the support ring and extending along the axial direction. The support column has at least a plurality of support columns that correspond one-to-one to the petals and are arranged circumferentially along the support ring, and the petals are hinged on the corresponding support columns.

[0017] Further preferably, there are a plurality of support rings arranged along the axial direction.

[0018] Preferably, the balloon opening and closing drive assembly includes a threaded tube movably arranged in the outer tube, a drive ring threadedly connected to the distal end of the threaded tube, and a drive rod arranged between the drive ring and the petals and corresponding to the petals one by one. The two ends of the drive rod are respectively hinged to the drive ring and the corresponding petals. The threaded tube is connected to the outer shell and can be operably rotated around its axis so that the drive ring slides axially and drives the petals to open outward or close inward.

[0019] Further preferably, the balloon expansion and closing drive assembly further comprises a rotation button provided on the housing, the threaded tube is connected to the rotation button, and the threaded tube rotates when the rotation button is operated.

[0020] Preferably, the grasping forceps includes a connecting seat and a first clamp body and a second clamp body rotatably arranged at the left and right ends of the connecting seat.

[0021] Preferably, the grasping forceps drive assembly includes a first rod and a second rod slidably arranged in the outer tube along the axial direction, and a transmission rod group connected between the second rod and the grasping forceps, the first rod is fixedly connected to the connecting seat, and when the first rod and the second rod move simultaneously and in the same direction, the grasping forceps has a tendency to extend the balloon or retract the balloon; when one of the first rod and the second rod moves or both move in opposite directions, the grasping forceps has a tendency to switch to an expanded state or a closed state.

[0022] In some embodiments, the transmission rod group includes a connecting rod fixedly connected to the second rod member, two first transmission arms rotatably provided on the left and right sides of the connecting rod, and two second transmission arms rotatably provided on the two first transmission arms, respectively. The two second transmission arms are respectively connected to the first clamp body and the second clamp body or their rotating shafts. When the connecting rod is away from the connecting seat, the first transmission arm and the second transmission arm rotate and the angle between the two gradually increases and drives the first clamp body and the second clamp body to move away from each other; when the connecting rod is close to the connecting seat, the first transmission arm and the second transmission arm rotate and the angle between the two gradually decreases and drives the first clamp body and the second clamp body to move towards each other.

[0023] Preferably, the shell, outer tube and balloon each have a guidewire channel for the guidewire to pass through.

[0024] Preferably, the balloon is connected to the outer tube via a spherical joint.

[0025] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0026] The balloon in the vascular dilation device of the present invention is a mechanical balloon, which has greater supporting force in the expanded state and has a better treatment effect on calcified stenosis; in addition, the balloon in the vascular dilation device is also provided with a grasping forceps, which can be moved according to needs to remove diseased tissue or foreign matter inside and outside the balloon. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 Schematic diagram of the structure of the distal portion of the vascular dilation device of Example 1, wherein the balloon is in an expanded state and the grasping forceps are in a released state;

[0029] Figure 2 This is another schematic diagram of the distal portion of the vascular dilation device of Example 1, wherein the balloon is in an expanded state and the grasping forceps is in a released state;

[0030] Figure 3 Another structural schematic diagram of the distal portion of the vascular dilation device of Example 1, wherein the balloon is in an expanded state and the grasping forceps are in a released state

[0031] Figure 4 This is an exploded view of the distal portion of the vasodilator of Example 1, wherein the balloon is in a closed state and the grasping forceps is in a clamped state;

[0032] Figure 5 This is a schematic structural diagram of the distal portion of the vasodilator of Example 1 without showing the balloon;

[0033] Figure 6 This is a schematic structural diagram of the distal portion of the vascular dilation device of Example 1 without the grasping forceps;

[0034] Figure 7 This is a schematic structural diagram of the grasping forceps of the vascular dilation device of Example 1;

[0035] Figure 8 This is a schematic structural diagram of the handle of the vasodilator of Example 1;

[0036] Including: 1. outer tube; 11. spherical joint;

[0037] 2. Balloon; 21. Shaped region; 22. Petal; 221. First portion; 222. Transition region; 223. Gradual region; 224. Guidewire channel; 23. First support rod; 24. Second support rod; 25. Support ring; 26. Support column;

[0038] 3. Grasping forceps; 31. First forceps body; 32. Second forceps body; 33. Connecting seat;

[0039] 4. Handle 4; 41. Housing; 411. Rotary button; 412. Pull rod; 413. Trigger; 42. Threaded tube; 43. Drive ring; 44. Drive rod; 45. First rod; 46. Second rod; 47. Connecting rod; 48. First transmission arm; 49. Second transmission arm;

[0040] 5. Guide wire;

[0041] 6. Double-lumen tube. DETAILED DESCRIPTION

[0042] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0043] In describing the embodiments of the present invention, it should be understood that the terms "distal" and "proximal," etc., indicating positions or relationships, are defined based on the orientation of the vasodilator device during use, with the side closest to the operator being the proximal end and the side farther from the operator being the distal end. These terms are used solely for the purpose of facilitating the description of the embodiments of the present invention and to simplify the description. They do not indicate or imply that the device or component referred to must have, be constructed, or operate in a specific orientation, and are not to be construed as limiting the embodiments of the present invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0045] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed.

[0047] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0048] Example 1

[0049] A vascular dilation device includes an outer tube 1, a balloon 2 connected to the distal end of outer tube 1, a grasping forceps 3 disposed within balloon 2, and a handle 4 connected to the proximal end of outer tube 1. Handle 4 includes a housing 41, a balloon expansion and closing drive assembly disposed on housing 41 and configured to drive balloon 2 to expand or close, and a grasping forceps drive assembly configured to move grasping forceps 3 and switch grasping forceps 3 between a clamped state and a released state.

[0050] See also Figures 1 to 4 and Figure 6 The balloon 2 has a shaping area 21 and a deformation area. The shaping area 21 is connected to the outer tube 1, preferably through a spherical joint 11. The deformation area includes a plurality of flaps 22 arranged along the circumference of the shaping area 21. The plurality of flaps 22 are hinged to the shaping area 21, and the flaps 22 can be operated to rotate away from the axis of the balloon 2, thereby expanding outward (see Figures 1 to 3 ), or rotate in a direction close to the axis, thereby closing inward (see Figure 4 、 Figure 6 ), thereby enabling the balloon to switch between an expanded state and a closed state. Preferably, the number of the petals 22 is 3 to 5. In this embodiment, the number of the petals 22 is 4.

[0051] The present invention allows the balloon 2 to be expanded or closed by rotating the flap 22, and the expansion size of the balloon 2 can be adjusted according to the rotation angle of the flap 22, which is very convenient. Compared with a thin film balloon, the balloon 2 has greater support force in the expanded state and has a better treatment effect on calcified stenosis.

[0052] Furthermore, the flap 22 includes a hinged first portion 221 and a second portion, the second portion being located distally from the first portion 221 and having a transition region 222 and a gradual transition region 223. In the closed state, the distance from the transition region 222 to the axis of the balloon 2 is uniform from proximal to distal, i.e., the outer diameters of different regions of the transition region 222 are uniform; the gradual transition region 223 is located distally from the transition region 222 and its distance from the axis gradually decreases from proximal to distal, i.e., the outer diameter of the gradual transition region 223 is larger at the proximal end and smaller at the distal end.

[0053] When the flaps 22 rotate outward and open, their opening radius typically increases from proximal to distal, which can result in: 1) the flaps 22 having difficulty conforming to the vessel wall; and 2) the risk of the distal portion of the flaps 22 rupturing the vessel wall. The present invention utilizes the design of the first portion 221 and the second portion, so that when the flaps 22 rotate outward and open, the second portion rotates slightly inward due to the pressure from the vessel's inner wall, thereby preventing the distal portion of the flaps 22 from rupturing the vessel due to an excessively large opening radius. Furthermore, the design of the transition region 222 and the gradual transition region 223 allows the deformed region to better conform to the vessel's inner wall, resulting in a more optimal expansion effect.

[0054] In order to further enhance the supporting effect of the deformation zone, the balloon 2 further includes a first supporting rod 23 and a second supporting rod 24 fixedly connected to the first portion 221 and the inner side of the second portion. Figure 3 The first support rod 23 extends in the same direction as the first part 221 and its two ends are hinged to the shaping area 21 and the second support rod 24 respectively. Multiple first support rods 23 can be provided as needed, and the second support rod 24 is connected to the transition area 222.

[0055] The shaping area 21 includes a cylindrical capsule, a support ring 25 provided inside the capsule, and a support column 26 connected to the support ring 25 and extending axially. There are multiple support columns 26 corresponding to the petals 22 and arranged along the circumference of the support ring 25. The support columns 26 are hinged to the first support rod 23 of the corresponding petal 22. The number of support rings 25 can be adaptively set according to the size of the deformation zone. In this embodiment, there are two support rings 25 and they are arranged at intervals along the axial direction of the balloon 2. The capsule, the first part 221 and the second part are preferably made of nylon. The support ring 25, the support column 26, the first support rod 23 and the second support rod 24 are preferably made of stainless steel.

[0056] In order to achieve the expansion and closing of the balloon 2, the balloon opening and closing drive assembly of the present invention includes a threaded tube 42, a drive ring 43 and a drive rod 44. Among them, the threaded tube 42 is rotatably arranged in the outer tube 1, and its distal end passes through the support ring 25 and extends into the balloon 2, and the proximal end is operably arranged on the outer shell 41. The drive ring 43 is threadedly connected to the distal end of the threaded tube 42. The drive rod 44 is arranged between the drive ring 43 and the petal 22 and is arranged in a one-to-one correspondence with the petal 22. The two ends of the drive rod 44 are respectively hinged on the drive ring 43 and the first support rod 23 of the corresponding petal 22. When the threaded tube 42 rotates around its axis, the threaded tube 42 drives the drive ring 43 to slide axially and drive the petal 22 to open outward or close inward. Specifically, when the threaded tube 42 is rotated, the drive ring 43 can slide toward the distal end, thereby pushing the drive rod 44 to rotate outward, and the drive rod 44 pushes the first support rod 23 outward, and the first support rod is forced to rotate outward, thereby driving the petals 22 to expand outward; when the threaded tube 42 is rotated in the opposite direction, the drive ring 43 slides toward the proximal end, thereby pulling the drive rod 44 to rotate inward, and the drive rod 44 pulls the first support rod 23 and the petals 22 to close inward.

[0057] In order to facilitate the rotation of the threaded tube 42, as Figure 8 As shown, the balloon opening and closing drive assembly further includes a rotation button 411 provided on the housing 41 , and the threaded tube 42 is connected to the rotation button 411 . When the rotation button 411 is operated, the threaded tube 42 rotates synchronously.

[0058] The grasping forceps 3 are slidably arranged in the balloon 2 along the axial direction of the balloon 2, and have a clamping state and a loosening state. Figure 7 The grasping forceps 3 includes a connecting base 33 and a first clamp body 31 and a second clamp body 32 rotatably arranged on the left and right ends of the connecting base 33. The first clamp body 31 and the second clamp body 32 are preferably provided with anti-slip grooves on the clamping surfaces relative to each other to better clamp foreign matter or diseased tissue.

[0059] The grasping forceps 3 is controlled by a grasping forceps drive assembly to slide and switch between a clamped state and a released state. Specifically, the grasping forceps drive assembly includes a first rod 45, a second rod 46, and a transmission rod assembly. The first rod 45 is axially slidably disposed within the outer tube 1, preferably within the threaded tube 42, with its distal end fixedly connected to the connecting seat 33 and its proximal end operably connected to the outer shell 41. The second rod 46 is also axially slidably disposed within the outer tube 1, preferably within the threaded tube 42, with its proximal end operably connected to the outer shell 41 and its distal end connected to the transmission rod assembly. The transmission rod assembly includes a connecting rod 47 fixedly connected to the distal end of the second rod 46, two first transmission arms 48 rotatably disposed on the left and right sides of the connecting rod 47, and two second transmission arms 49 rotatably disposed on the two first transmission arms 48, respectively. The two second transmission arms 49 are respectively connected to the rotating shafts of the first and second jaw bodies 31 and 32. When the first rod 45 and the second rod 46 move toward the distal end at the same time, the grasping forceps 3 can extend out of the balloon 2 and be exposed; when the first rod 45 and the second rod 46 move toward the proximal end at the same time, the grasping forceps 3 can be retracted into the balloon 2. When one of the first rod 45 and the second rod 46 moves or both move in opposite directions, the grasping forceps 3 has a tendency to switch to an expanded state or a closed state, that is, when the connecting rod 47 moves away from the connecting seat 33 under the drive of the first rod 45 and the second rod 46, the first transmission arm 48 and the second transmission arm 49 rotate and the angle between them gradually increases, driving the first jaw body 31 and the second jaw body 32 to move away from each other, and the grasping forceps 3 opens; when the connecting rod 47 approaches the connecting seat 33, the first transmission arm 48 and the second transmission arm 49 rotate and the angle between them gradually decreases, driving the first jaw body 31 and the second jaw body 32 to move toward each other, and the grasping forceps 3 closes.

[0060] To facilitate operation of the first rod 45 and the second rod 46, the housing 41 is provided with a pull rod 412 corresponding to the first rod 45 and a trigger 413 corresponding to the second rod 46. Operating the pull rod 412 and the trigger 413 can respectively drive the first rod 45 and the second rod 46 to move. The specific design of the pull rod 412 and the trigger 413 can refer to the existing technology.

[0061] In order to prevent the first rod 45 and the second rod 46 from interfering with each other, a double-lumen tube 6 is further provided in the threaded tube 42 . The first rod 45 and the second rod 46 pass through the first channel and the second channel of the double-lumen tube 6 respectively to connect with their corresponding components.

[0062] To guide the balloon 2 to the target location, the vascular dilation device's housing 41, outer tube 1, and balloon 2 are each provided with a guidewire channel 224 for the passage of a guidewire 5. The guidewire channel 224 in the outer tube 1 is located within the threaded tube 42. The guidewire channel 224 of the balloon 2 is partially located within the shaping zone 21, specifically between the support ring 25 and the threaded tube 42, with the remaining portion located outside one of the petals 22 in the deformation zone.

[0063] Working principle:

[0064] Place the balloon 2 at the target position, turn the rotation button 411 to rotate the threaded tube 42 synchronously. While the threaded tube 42 rotates, the drive ring 43 is driven to move axially toward the distal end. Driven by the drive ring 43, the drive rod 44 thereon rotates outward and drives the first support rod 23 to rotate outward. The flap 22 gradually expands outward, thereby squeezing the plaque at the narrow area outward to achieve vascular dilation.

[0065] At this point, the grasping forceps 3 can be operatively extended from the balloon 2 to grasp foreign matter or diseased tissue. Specifically, by simultaneously pushing the pull rod 412 and depressing the trigger 413, the first rod 45 and the second rod 46 synchronously slide toward the distal end, pushing the grasping forceps 3 out of the balloon 2. The trigger 413 is then reversed, causing the second rod 46 to pull the connecting rod 47 and slide away from the grasping forceps 3. The connecting rod 47 pulls the first transmission arm 48 and the second transmission arm 49 to rotate until both are straightened. Driven by the transmission arms, the first and second jaws 31 and 32 rotate away from each other, and the grasping forceps 3 are opened. After grasping the foreign matter or diseased tissue, the trigger 413 is depressed to close the grasping forceps 3. The pull rod 412 and trigger 413 are then simultaneously reversed to retract the grasping forceps 3 into the balloon 2.

[0066] Rotate the rotation button 411 in the opposite direction, and the threaded tube 42 rotates in the opposite direction, driving the drive ring 43 to move axially toward the proximal end. The drive ring 43 pulls the drive rod 44 to rotate inward, and drives the first support rod 23 to rotate inward. The flaps 22 gradually rotate inward and close, and the balloon 2 can be withdrawn.

[0067] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A vasodilator, characterized in that: The vasodilator comprises: outer tube (1); A balloon (2), the balloon (2) having a shaped region (21) and a deformable region, the shaped region (21) being connected to the distal end of the outer tube (1), the deformable region comprising a plurality of flaps (22) arranged along the circumference of the shaped region (21), the plurality of flaps (22) being hinged on the shaped region (21) and operable to rotate in a direction away from or close to the axis of the balloon (2) so that the balloon can switch between an expanded state and a closed state, the flaps (22) comprising a first portion (221) and a second portion that are hinged to each other; A grasping forceps (3), the grasping forceps (3) being slidably arranged in the balloon (2) along the axial direction of the balloon (2), and having a clamping state and a loosening state; A handle (4), the handle (4) comprising a housing (41) connected to the proximal end of the outer tube (1), a balloon opening and closing drive assembly arranged on the housing (41) and configured to drive the balloon to expand or close, and a grasping forceps drive assembly configured to make the grasping forceps (3) slide and / or drive the grasping forceps (3) to switch between a clamped state and a released state.

2. The vasodilator according to claim 1, characterized in that The second part is located at the distal end of the first part (221) and has a transition area (222) and a gradual change area (223); in a closed state, the distance between the transition area (222) and the axis is consistent from near to far, and the gradual change area (223) is located at the distal end of the transition area (222) and the distance between the transition area (222) and the axis gradually decreases from near to far.

3. The vasodilator according to claim 1, wherein: The balloon (2) further comprises a first support rod (23) and a second support rod (24) fixedly connected to the first portion (221) and the inner side of the second portion of the flap (22); the first support rod (23) and the first portion (221) extend in the same direction, and both ends of the first support rod (23) are hinged to the shaping area (21) and the second support rod (24), respectively.

4. The vasodilator according to claim 1, wherein: The shaping area (21) includes a cylindrical capsule, a support ring (25) provided inside the capsule, and a support column (26) connected to the support ring (25) and extending along the axial direction. The support column (26) has at least a plurality of corresponding flaps (22) and arranged along the circumference of the support ring (25). The flaps (22) are hinged on the corresponding support columns (26).

5. The vasodilator according to claim 1, wherein: The balloon opening and closing drive assembly includes a threaded tube (42) movably arranged in the outer tube (1), a drive ring (43) threadedly connected to the distal end of the threaded tube (42), and a drive rod (44) arranged between the drive ring (43) and the flap (22) and corresponding to the flap (22) one by one. The two ends of the drive rod (44) are respectively hinged to the drive ring (43) and the flap (22) corresponding thereto. The threaded tube (42) is connected to the outer shell (41) and can be operably rotated around its axis so that the drive ring (43) slides axially and drives the flap (22) to open outward or close inward.

6. The vasodilator according to claim 1, characterized in that The grasping forceps (3) comprises a connecting seat (33) and a first clamp body (31) and a second clamp body (32) rotatably arranged at the left and right ends of the connecting seat (33); The grasping forceps drive assembly comprises a first rod (45) and a second rod (46) which are slidably arranged in the outer tube (1) along the axial direction, and a transmission rod group connected between the second rod (46) and the grasping forceps (3), wherein the first rod (45) is fixedly connected to the connecting seat (33), and when the first rod (45) and the second rod (46) move simultaneously and in the same direction, the grasping forceps (3) has a tendency to extend the balloon (2) or retract the balloon (2); when one of the first rod (45) and the second rod (46) moves or both move in opposite directions, the grasping forceps (3) has a tendency to switch to an expanded state or a closed state.

7. The vasodilator according to claim 6, characterized in that: The transmission rod group comprises a connecting rod (47) fixedly connected to the second rod (46), two first transmission arms (48) rotatably arranged on the left and right sides of the connecting rod (47), and two second transmission arms (49) rotatably arranged on the two first transmission arms (48), respectively. The two second transmission arms (49) are respectively connected to the first caliper (31), the second caliper (32) or the rotating shaft thereof. When the connecting rod (47) moves away from the connecting seat (33), the first transmission arm (48) and the second transmission arm (49) rotate, and the angle between them gradually increases, and the first caliper (31) and the second caliper (32) are driven to move in a direction away from each other; when the connecting rod (47) and the connecting seat (33) move closer, the first transmission arm (48) and the second transmission arm (49) rotate, and the angle between them gradually decreases, and the first caliper (31) and the second caliper (32) are driven to move in a direction close to each other.

8. The vasodilator according to claim 1, characterized in that The outer shell (41), the outer tube (1) and the balloon (2) are respectively provided with a guidewire channel (224) for the guidewire (5) to pass through.

9. The vasodilator according to claim 1, characterized in that: The balloon (2) is connected to the outer tube (1) via a spherical joint (11).

Images