Cutting device

Abstract

The invention discloses a resection device and relates to the technical field of medical instruments, the resection device comprises a catheter and a cutting assembly arranged at the far end of the catheter, the cutting assembly comprises a cutting tool bit, the resection device further comprises an anchoring assembly, the anchoring assembly comprises an anchoring rod and an anchoring piece, the anchoring rod is arranged on one side of the catheter in the radial direction of the catheter, and the anchoring piece is arranged on the other side of the catheter. The far end of the anchoring rod is located at the far end of the catheter, the anchoring piece is connected to the far end of the anchoring rod, and the anchoring piece and the cutting tool bit are correspondingly arranged in the axial direction of the catheter. The eccentric lesion is clamped through the anchoring piece and the cutting tool bit, so that the eccentric lesion is located among the anchoring piece, the anchoring rod and the cutting tool bit, then the cutting tool bit is used for cutting the eccentric lesion, and the possibility that the cutting tool bit is separated from the eccentric lesion can be reduced; it is guaranteed that the cutting tool bit is always located at the good cutting position for the eccentric lesion, complete excision of the eccentric lesion is facilitated, and the operation efficiency and the operation effect are improved.

Description

Technical Field

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

[0002] What is provided in this section is only background information related to the present disclosure, and it is not necessarily prior art.

[0003] With the increasing aging of the population and the change of diet structure, the incidence of vascular diseases has risen sharply. The main cause of peripheral arterial disease is atherosclerosis, which often manifests as ischemic changes in the limbs, abdominal arteries, carotid arteries, renal arteries, etc. The treatment methods mainly include basic treatment mainly based on drug treatment, open surgical treatment represented by classical surgical bypass surgery, and newly developed endovascular interventional treatment.

[0004] Although surgical bypass surgery has a relatively superior long-term patency rate, thus maintaining its traditional position in vascular reconstruction, endovascular interventional treatment technology has gradually been accepted by clinicians and patients due to its minimally invasive, safe, effective, and repeatable advantages, and there is a trend that the number of applications has exceeded that of bypass surgery. Among them, peripheral atherectomy is mainly aimed at stenosis or occlusion of the femoral, popliteal, and infrapopliteal arteries.

[0005] However, when the existing resection device for peripheral atherectomy performs eccentric lesion resection, since the eccentric lesion is located on one side of the blood vessel wall, the cutting component of the resection device cannot completely align with the eccentric lesion for cutting operation. This not only requires frequent adjustment of the direction of the cutting component, resulting in low surgical efficiency and poor surgical effect, but also easily cuts the non-lesion side of the blood vessel, causing damage to the patient's blood vessel.

[0006] Therefore, a new technical means is needed to solve the above problems of the prior art. Summary of the Invention

[0007] The purpose of the present invention is to at least solve the problems that the existing resection device has poor resection effect on eccentric lesions and is prone to damage the patient's blood vessels.

[0008] The present invention provides a resection device, including a catheter and a cutting component arranged at the distal end of the catheter. The cutting component includes a cutting head. Wherein, the resection device further includes an anchoring component, the anchoring component includes an anchoring rod and an anchoring piece. The anchoring rod is arranged radially along the catheter on one side of the catheter, and the distal end portion of the anchoring rod is located at the distal end of the catheter. The anchoring piece is connected to the distal end of the anchoring rod, and the anchoring piece and the cutting head are arranged correspondingly along the axial direction of the catheter.

[0009] Through the resection device of the present invention, when performing the eccentric lesion resection operation, the anchor and the cutting head are used to clamp the eccentric lesion, so that the eccentric lesion is located between the anchor, the anchor rod and the cutting head, and then the cutting head is used to cut the eccentric lesion, which can reduce the possibility of the cutting head being separated from the eccentric lesion, ensure that the cutting head is always in a good cutting position for the eccentric lesion, and is conducive to achieving complete resection of the eccentric lesion, improving surgical efficiency and surgical effect. At the same time, the anchor rod is used to separate the non-lesion area of ​​the blood vessel from the cutting head, which can also reduce the possibility of the cutting head injuring the patient's blood vessels and improve safety.

[0010] In addition, the resection device according to the present invention may also have the following additional technical features:

[0011] In some embodiments of the present invention, the anchoring assembly can move along the axial direction of the catheter to anchor the diseased site in the blood vessel; the anchoring assembly also includes a guide rod passing through the catheter, the distal end of the guide rod is connected to the proximal end of the anchoring rod, and the guide rod can move along the axial direction of the catheter to drive the anchoring rod and the anchoring member to move along the axial direction of the catheter.

[0012] In some embodiments of the present invention, the resection device also includes a handle body, the catheter is connected to the handle body, the anchoring assembly also includes a handpiece arranged at the proximal end of the guide rod, the proximal end of the guide rod is provided with a connecting portion for connecting the handpiece, the handle body is detachably connected to a support frame, and the support frame is provided with a clamping member for locking the connecting portion.

[0013] In some embodiments of the present invention, the guide rod has telescopic performance along the axial direction of the catheter, an extension portion is provided on the catheter, the extension portion is provided on one side of the radial direction of the catheter, the extension portion and the catheter are provided along the same axial direction, and the guide rod is inserted into the extension portion.

[0014] In some embodiments of the present invention, the anchor member includes a first surface facing away from the cutting head and a second surface facing the cutting head, and the distance between the first surface and the distal end of the anchor rod along the axial direction of the catheter gradually decreases from the center to the edge of the first surface.

[0015] In some embodiments of the present invention, the anchor member includes a first surface facing away from the cutting head and a second surface facing the cutting head, and the second surface is recessed toward the first surface to form a receiving groove; the receiving groove is provided with a plurality of first protrusions arranged at intervals, or the receiving groove is provided with a plurality of grooves arranged at intervals, or the receiving groove is provided with a plurality of through holes arranged at intervals.

[0016] In some embodiments of the present invention, the anchoring rod and the cutting head are arranged at intervals in the radial direction of the catheter. On one side of the anchoring rod facing the cutting head, there are a plurality of second protrusions, and the plurality of second protrusions are arranged at intervals along the extending direction of the anchoring rod; a first through hole is formed in the middle of the anchoring member, and the first through hole axially penetrates the anchoring member along the catheter.

[0017] In some embodiments of the present invention, the resection device further includes a sleeve. The sleeve is connected to the distal end of the catheter, the cutting head is connected to the distal end of the sleeve, and the anchoring rod passes through the sleeve.

[0018] In some embodiments of the present invention, the resection device further includes a handle body. The catheter is connected to the handle body. The handle body is provided with a bending adjustment assembly and a wire fixing assembly. A bending adjustment wire connected to the distal end of the catheter is arranged inside the catheter. The wire fixing assembly is movably connected to the catheter and fixedly connected to the proximal end of the bending adjustment wire. The bending adjustment assembly is connected to the wire fixing assembly and the catheter. The bending adjustment assembly is used to drive the catheter to rotate circumferentially, and the bending adjustment assembly controls the bending of the distal end of the catheter through the wire fixing assembly and the bending adjustment wire.

[0019] In some embodiments of the present invention, the wire fixing assembly is movably connected to the catheter and is arranged inside the bending adjustment assembly. The bending adjustment assembly can separately drive the wire fixing assembly to axially move relative to the catheter or separately drive the wire fixing assembly to rotate synchronously with the catheter. Description of the Drawings

[0020] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0021] Figure 1 Schematically shows a structural schematic diagram of the resection device provided in the first embodiment of the present invention;

[0022] Figure 2 is Figure 1 the cross-sectional view A-A in

[0023] Figure 3 is Figure 1 the enlarged view of part a shown in

[0024] Figure 4 Schematically shows a structural schematic diagram of the anchoring assembly and the cutting head of the resection device provided in the first embodiment of the present invention;

[0025] Figure 5 The Figure 4 schematic diagram of the state where the anchoring component and the cutting head in

[0026] Figure 6 The Figure 4 schematic diagram of the state where the anchoring component and the cutting head pass through the narrow lesion in

[0027] Figure 7 The Figure 4 schematic diagram of the state where the anchoring component and the cutting head pass through the narrow lesion in

[0028] Figure 8 Schematically shows the structural schematic diagram of the anchoring component and the cutting head of the resection device provided in the second embodiment of the present invention;

[0029] Figure 9 Schematically shows the structural schematic diagram of the anchoring component and the cutting head of the resection device provided in the third embodiment of the present invention;

[0030] Figure 10 Schematically shows the structural schematic diagram of the anchoring component and the cutting head of the resection device provided in the fourth embodiment of the present invention;

[0031] Figure 11 Schematically shows the structural schematic diagram of the anchoring component and the cutting head of the resection device provided in the fifth embodiment of the present invention;

[0032] Figure 12 Is the three - dimensional structural schematic diagram of the resection device in the sixth embodiment of the present invention;

[0033] Figure 13 Is the internal structural schematic diagram of the resection device in the sixth embodiment of the present invention;

[0034] Figure 14 Is the three - dimensional exploded view of the resection device from one perspective in the sixth embodiment of the present invention;

[0035] Figure 15 Is the plane cross - sectional view of the guide wire locking device and the shaft - driven gear of the resection device in the sixth embodiment of the present invention in cooperation through a bearing;

[0036] Figure 16 Is the three - dimensional exploded view of the resection device from another perspective in the sixth embodiment of the present invention;

[0037] Figure 17 Is the internal structural schematic diagram of the first cylinder shell in the sixth embodiment of the present invention;

[0038] Figure 18 Is the three - dimensional structural schematic diagram of the hollow limit shaft of the push switch in the sixth embodiment of the present invention;

[0039] Figure 19 It is a three-dimensional structural schematic diagram of the second wire-fixing slider of the wire-fixing component in the sixth embodiment of the present invention;

[0040] Figure 20 It is a three-dimensional structural schematic diagram of the clamp of the push switch in the sixth embodiment of the present invention;

[0041] Figure 21 It is a three-dimensional structural schematic diagram of the tooth plate of the push switch in the sixth embodiment of the present invention;

[0042] Figure 22 It is a three-dimensional exploded view of the driving device of the cutting device in the sixth embodiment of the present invention;

[0043] Figure 23 It is a three-dimensional exploded view of the cutting device in the seventh embodiment of the present invention;

[0044] Figure 24 It is a three-dimensional structural schematic diagram of the sliding key of the wire-fixing component in the seventh embodiment of the present invention;

[0045] Figure 25 It is a three-dimensional structural schematic diagram of the second cylinder shell of the adjusting cylinder in the seventh embodiment of the present invention.

[0046] The reference numerals are as follows:

[0047] 100. Excision device; 200. Eccentric lesion; 10. Handle body; 12. Second handle shell; 121. Damping rib position; 122. Ball plunger; 123. Stress diffusion tube; 13. Third handle shell; 20. Catheter; 21. Extension part; 22. Steering wire; 30. Cutting assembly; 31. Cutting tool head; 32. Torque shaft; 40. Anchoring assembly; 41. Anchoring rod; 411. Guide arc surface; 412. Second protrusion; 42. Anchor; 421. First surface; 422. Second surface; 423. Accommodating groove; 4231. Anchoring groove part; 4232. Anchoring mesh hole; 424. First through hole; 4241. Connecting hole; 425. First protrusion; 4251. Second through hole; 43. Guide rod; 44. Support frame; 45. Handheld part; 46. Clamping part; 47. Connecting part; 48. Sleeve; 50. Wire fixing assembly; 52. Second wire fixing slider; 521. Second wire threading hole; 522. Wire fixing hole; 523. Avoidance hole; 53. Wire fixing pin; 54. Sliding key; 541. Sliding shaft; 5411. Sliding hole; 542. Fixed frame; 5421. Third wire threading hole; 5422. Hook; 543. Sliding key; 60. Steering adjustment assembly; 612. Rotating knob; 614. Buffer elastic part; 63. Adjusting cylinder; 631. First cylinder shell; 6311. First keyway; 6312. Rib; 63121. Damping hole; 632. Second cylinder shell; 6321. Second keyway; 6322. Second damping tooth; 64. Press switch; 641. Press key; 642. Hollow limiting shaft; 6421. Rack; 6422. Wire threading hole; 643. Clamping part; 6431. Clamp; 64311. Positioning groove; 64312. Mounting post; 6432. Tooth plate; 64321. Tooth gap; 64322. Positioning protrusion; 644. Return spring; 645. Guide cylinder; 6451. Guide rib; 70. Wire locking device; 71. Cap nut; 72. Sealing gasket; 73. Cylinder base; 80. Driving device; 81. Motor; 82. Electric wire; 83. Battery; 84. Driving switch; 85. Power switch; 86. Y-valve; 87. Gear pair; 88. Bearing; 89. Mounting shaft. Detailed implementation mode

[0048] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0049] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an execution order is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0050] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly dictates otherwise, terms such as "first", "second", and other numerical terms when used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0051] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures, such as "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figure is flipped, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can include both the above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are to be interpreted accordingly.

[0052] In addition, it should be noted that in the field of interventional medical devices, generally, the end of a medical device implanted in the human body or animal body or the delivery system for delivering the medical device that is closer to the operator is called the "proximal end", and the end that is farther from the operator is called the "distal end". Based on this principle, the "proximal end" and "distal end" of any component of the medical device or delivery system are defined. The "axial direction" generally refers to the length direction of the medical device during delivery, and the "radial direction" generally refers to the direction perpendicular to the "axial direction" of the medical device. Based on this principle, the "axial direction" and "radial direction" of any component of the medical device are defined.

[0053] Embodiment 1

[0054] Combined with the attached Figure 1 - attached Figure 4 As shown in the attached drawings, Embodiment 1 of the present invention provides a resection device 100. The resection device 100 is used to resect embolisms in blood vessels, such as thrombus or plaque tissue. The resection device 100 includes a handle body 10, a catheter 20 connected to the handle body 10, and a cutting assembly 30 provided at the distal end of the catheter 20. The handle body 10 is a structure held by the operator during the surgical process. The material of the catheter 20 can be a polymer material, a nitinol material, or a stainless steel composite material. The cutting assembly 30 includes a cutting blade head 31 for resecting thrombus or plaque tissue, and the material of the cutting blade head 31 can be stainless steel.

[0055] Combined with Figure 2 As shown, the cutting assembly 30 of this embodiment includes a torque shaft 32. The cutting blade head 31 is fixedly connected to the distal end of the torque shaft 32. The rotational cutting action of the cutting blade head 31 is realized by the torque shaft 32 passing through the catheter 20. The torque shaft 32 is made of nitinol metal material. The connection method between the distal end of the torque shaft 32 and the proximal end of the cutting blade head 31 can be fixed by welding. A driving structure (not shown in the figure) is provided inside the handle body. The driving structure drives the rotation of the torque shaft 32 to drive the cutting blade head 31 to rotate synchronously, so as to realize the rotation of the cutting blade head 31, thereby cutting the plaque in the blood vessel. The driving structure can be a motor and a gear transmission group.

[0056] As Figure 3 and Figure 4As shown in the figure, when the eccentric lesion 200 in the blood vessel is an atherosclerotic plaque, in order to reduce the possibility that the cutting head 31 detaches from the eccentric lesion 200 during the resection operation, the resection device 100 of this embodiment further includes an anchoring assembly 40 to anchor the eccentric lesion through the anchoring assembly 40. The anchoring assembly 40 includes an anchoring rod 41 and an anchor 42, and the anchor 42 is used to clamp the eccentric lesion 200 from the distal end. The material of the anchoring rod 41 can be a nickel-titanium metal material, and the material of the anchor 42 can be a metal material such as stainless steel or nickel-titanium, or other polymer materials with a certain structural strength. The anchoring rod 41 passes through the catheter 20 and at least part of it is located at the distal end of the catheter 20. The anchoring rod 41 and the cutting head 31 are arranged at intervals along the radial direction of the catheter 20, and the anchoring rod 41 is located on one side of the cutting head 31 along the radial direction of the catheter 20.

[0057] Among them, the anchor 42 is connected to the distal end of the anchoring rod 41. When the anchor 42 and the anchoring rod 41 are made of metal materials, the anchor 42 and the anchoring rod 41 can be fixed by welding or integrally formed. When the anchor 42 and the anchoring rod 41 are made of polymer materials, the anchor 42 and the anchoring rod 41 can be integrally formed during processing by injection molding or other methods. In order to balance the anchoring property and passability of the anchor 42, the radial dimension of the anchor 42 should be smaller than the radial dimension of the target blood vessel and larger than half of the radial dimension of the target blood vessel. For example, the radial dimension of the anchor 42 is 0.5-0.7 times the radial dimension of a normal peripheral artery blood vessel. Since the anchoring rod 41 is made of a nickel-titanium metal material or a polymer material with elastic properties, it can deform when being squeezed, so that the anchor 42 can span from the proximal end to the distal end of the eccentric lesion 200.

[0058] Among them, the anchor 42 and the cutting head 31 have an interval along the axial direction of the catheter 20, that is, the anchor 42 is located at the distal end of the entire resection device 100, so that the eccentric lesion 200 can be clamped along the axial direction of the catheter 20 between the anchor 42 and the cutting head 31. Among them, the axial distance between the anchor 42 and the cutting head 31 can be set to be adjustable or fixed. When the axial distance between the anchor 42 and the cutting head 31 is fixed, the axial distance between the anchor 42 and the cutting head 31 can be designed to be less than or equal to the size of the common eccentric lesion 200.

[0059] When performing the resection operation of the eccentric lesion 200, first determine the position of the eccentric lesion 200 through angiography technology, and then operate the anchoring rod 41 so that the anchoring member 42 straddles the eccentric lesion 200, so that the anchoring member 42 and the cutting head 31 can clamp from the distal end and the proximal end of the eccentric lesion 200 respectively, and then use the cutting head 31 to cut the eccentric lesion 200, which can avoid the cutting head 31 detaching from the eccentric lesion 200, make the cutting head 31 in a good cutting position, be conducive to realizing the smooth resection of the eccentric lesion 200, and improve the surgical effect. In addition, it can also reduce the possibility of the cutting head 31 injuring the patient, because the anchoring rod 41 isolates the cutting head 31 and the non-lesioned side, improving safety.

[0060] To realize the position adjustment of the anchoring member 42, the anchoring rod 41 can move along the axial direction of the catheter 20. The movement of the anchoring rod 41 drives the anchoring member 42 to approach or move away from the cutting head 31, and then changes the clamping distance between the anchoring member 42 and the cutting head 31 to adapt to eccentric lesions 200 of different sizes. In other embodiments, the cutting head 31 can also realize position adjustment under the axial drive of the torque shaft 32, and can also realize the change of the clamping distance between the anchoring member 42 and the cutting head 31.

[0061] The anchoring assembly 40 of this embodiment further includes a guide rod 43. The guide rod 43 in the catheter 20 drives the anchoring rod 41 to move along the axial direction of the catheter 20, and the doctor can operate the guide rod 43 to move axially along the catheter 20. The guide rod 43 and the anchoring rod 41 are made of the same material and integrally formed. The axial movement of the guide rod 43 along the catheter 20 drives the anchoring rod 41 to move along the axial direction of the catheter 20, and then adjusts the distance between the anchoring member 42 and the cutting head 31 to realize the adjustment of the clamping distance.

[0062] In other embodiments, the guide rod 43 can also have the deformation ability of axial expansion and contraction. For example, the guide rod 43 is designed as a spring. The distal end of the guide rod 43 is connected to the proximal end of the anchoring rod 41, so that when the anchoring member 42 abuts against the eccentric lesion 200, it has a certain deformation and expansion margin, which is convenient for the anchoring member 42 to clamp the eccentric lesion 200 more tightly when anchoring. That is, when the anchoring member 42 anchors the eccentric lesion 200, the spring-shaped guide rod 43 is stretched, so that the guide rod 43 has a pulling force towards the proximal end on the anchoring member 42. When the cutting head 31 performs the cutting operation, the doctor only needs to push the cutting head 31. Under the elastic force of the guide rod 43, the anchoring member 42 can always clamp the eccentric lesion 200 tightly, so that the eccentric lesion 200 is always clamped during the cutting operation, further improving the anchoring effect and facilitating the cutting operation of the cutting head 31.

[0063] The outer wall of the catheter 20 is provided with an extension 21 extending radially outward therefrom. A guide rod 43 is installed inside the extension 21, and a torque shaft 32 is installed inside the catheter 20. The torque shaft 32 is coaxially arranged with the catheter 20. The guide rod 43 and the torque shaft 32 have a radial spacing and are parallel to each other.

[0064] Refer to the attached Figure 1 As shown, the anchoring assembly 40 further includes a support frame 44, a handpiece 45, a clamping member 46, and a connecting portion 47. Among them, the support frame 44 is detachably connected to the handle body 10. The clamping member 46 is installed on the support frame 44. The proximal end of the connecting portion 47 passes through the clamping member 46 and the support frame 44. The clamping member 46 is used to lock the connecting portion 47, and the connecting portion 47 is driven to move by the movement of the handpiece 45. When it is necessary to control the handpiece 45 to drive the connecting portion 47 to move, the support frame 44 is detached from the handle body 10, and then the clamping member 46 is loosened so that the connecting portion 47 can move relative to the support frame 44. At this time, the doctor can operate the handpiece 45 to push the connecting portion 47 to move axially along the catheter 20, thereby driving the anchor 42 to move.

[0065] Combined with the above structural description, the operation process of the cutting blade 31 and the anchoring assembly 40 in this embodiment will be described below. Refer to the attached Figure 5 As shown, when excising the eccentric lesion 200, the medical staff place the cutting blade 31 and the anchor 42 near the eccentric lesion 200 through visual angiography. Then the anchor 42 is pushed from one side of the eccentric lesion 200 to the other side of the eccentric lesion 200. Subsequently, according to the size of the eccentric lesion 200, the clamping distance between the cutting blade 31 and the anchor 42 is adjusted by operating the connecting portion 47 so that the clamping distance is greater than the size of the eccentric lesion 200, forming the state shown in Figure 6 As shown. Finally, the connecting portion 47 is operated again so that the cutting blade 31 and the anchor 42 clamp the eccentric lesion 200, forming the state shown in Figure 7 As shown. Then, the driving structure inside the handle body 10 is used to drive the torque shaft 32 to rotate, driving the cutting blade 31 to rotate for cutting the eccentric lesion 200. During the cutting process, as the size of the eccentric lesion 200 continuously decreases, the anchor 42 can be controlled to always clamp the eccentric lesion 200 by continuously operating the connecting portion 47, ensuring that the cutting blade 31 is always in a good cutting position for the eccentric lesion 200. The guide rod 43 can also be set as a spring, and the elastic restoring force of the guide rod 43 is used to drive the anchor 42 to always clamp the eccentric lesion 200.

[0066] In addition, combined with Figures 4 to 6As shown, in order to facilitate the anchoring member 42 to cross from one side of the eccentric lesion 200 to the other side of the eccentric lesion 200, the structure of the anchoring member 42 is also adaptively improved in this embodiment. The anchoring member 42 includes a first surface 421 facing the cutting head 31 and a second surface 422 facing away from the cutting head 31. From the center to the edge of the first surface 421, the axial distance between the first surface 421 and the distal end of the anchoring rod 41 gradually decreases.

[0067] The axial distance between the first surface 421 and the distal end of the anchoring rod 41 is designed to gradually decrease, so that the first surface 421 can form a guiding surface such as an arc surface, a hemispherical surface or an inclined surface. The first surface 421 with such a structure not only facilitates the entry of the anchoring member 42 and the anchoring rod 41 into the blood vessel, but also avoids scratching the blood vessel during the pushing process of the anchoring member 42. Moreover, when the anchoring member 42 has not passed through the eccentric lesion 200 and abuts against one side of the eccentric lesion 200, the first surface 421 can form a guide with the eccentric lesion 200, causing the distal end of the anchoring rod 41 to have an elastic deformation away from the eccentric lesion 200, so that the anchoring member 42 can cross from one side of the eccentric lesion 200 to the other side, facilitating the subsequent clamping of the eccentric lesion 200.

[0068] Refer to the appendix Figures 8 - 11 , the second surface 422 is designed to be recessed towards the first surface 421 to form a receiving groove 423. The setting of the receiving groove 423 makes the anchoring member 42 form a bowl-shaped structure. The receiving groove 423 can receive the distal side of the eccentric lesion 200 and play an anchoring role on the distal side of the eccentric lesion 200, reducing the possibility of the anchoring member 42 detaching from the eccentric lesion 200, and thus improving the stability of the clamping structure for clamping the eccentric lesion 200.

[0069] In order to facilitate the passage of the anchoring member 42 in the blood vessel, a first through hole 424 is also provided on the anchoring member 42 along its axial direction, penetrating through the first surface 421 and the second surface 422. The blood in the blood vessel can flow through the first through hole 424, reducing the resistance of the blood when the anchoring member 42 is pushed into the blood vessel. And when the cutting head 31 performs a cutting operation on the eccentric lesion 200, it can ensure the patency of the blood flow and avoid the problem of local blood blockage in the patient due to too long surgical time.

[0070] In other embodiments, the structure of the anchoring rod 41 can also be correspondingly improved. The anchoring rod 41 can be designed such that its thickness dimension and / or width dimension gradually decreases from the proximal end to the distal end, to facilitate the generation of a deformation away from the cutting head 31, thereby facilitating the anchoring member 42 to cross the eccentric lesion 200.

[0071] Further, a guiding arc surface 411 may be provided on a side of the anchoring rod 41 facing away from the cutting tool head 31. The guiding arc surface 411 extends from the distal end of the anchoring rod 41 to the middle of the anchoring rod 41, such that the distal end side of the anchoring rod 41 is recessed towards the direction of the cutting tool head 31. This structure can enable the anchoring rod 41 to enter the blood vessel more smoothly and avoid damaging the blood vessel wall.

[0072] Again referring to the attached Figure 4 As shown in the figure, the resection device 100 further includes a sleeve 48. The sleeve 48 is connected to the distal end of the catheter 20. The cutting tool head 31 is disposed at the distal end of the sleeve 48. The anchoring rod 41 passes through the sleeve 48. The material of the sleeve 48 may be a hard metal material such as stainless steel. The sleeve 48 is mainly used for assembling the cutting tool head 31 and can also play a role in connecting the catheter 20 and the anchoring rod 41. When assembling the resection device 100, first install the anchoring rod 41 and the cutting tool head 31 at the distal end of the sleeve 48, and then dock the sleeve 48 and the catheter 20. The sleeve 48 and the catheter 20 are fixed by welding.

[0073] In summary, through the resection device 100 in the present invention, when performing the resection operation on the eccentric lesion 200, the eccentric lesion 200 is clamped by the anchoring member 42 and the cutting tool head 31, such that the eccentric lesion 200 is located between the anchoring member 42, the anchoring rod 41 and the cutting tool head 31. Then, the cutting tool head 31 is used to cut the eccentric lesion 200, which can reduce the possibility of the cutting tool head 31 detaching from the eccentric lesion 200, ensure that the cutting tool head 31 is always in a good cutting position for the eccentric lesion 200, is conducive to realizing the smooth resection of the eccentric lesion 200, and improves the surgical efficiency and surgical effect. At the same time, the anchoring rod 41 separates the lesion-free area of the blood vessel from the cutting tool head 31, which can also reduce the possibility of the cutting tool head 31 cutting the patient's blood vessel and improve the safety.

[0074] Embodiment Two

[0075] Embodiment Two of the present invention provides a resection device 100. As Figure 8 shown, the same parts of Embodiment Two and Embodiment One will not be described in detail. The difference between Embodiment Two and Embodiment One is that a plurality of second protrusions 412 are provided on a side of the anchoring rod 41 facing the cutting tool head 31, and the plurality of second protrusions 412 are arranged at intervals along the extending direction of the anchoring rod 41.

[0076] A plurality of second protrusions 412 are connected to one side of the anchoring rod 41 facing the cutting head 31 at one end in the radial direction of the catheter 20, and the connection method can be by welding or integrally formed. The other ends of the plurality of second protrusions 412 in the radial direction of the catheter 20 are flush, further increasing the anchoring force on the eccentric lesion 200. The thickness of the anchoring rod 41 in this embodiment gradually decreases from the proximal end to the distal end. Correspondingly, the length dimension of the plurality of second protrusions 412 in the radial direction of the catheter 20 can be adaptively designed to gradually increase from the proximal end to the distal end of the anchoring rod 41.

[0077] When the clamping structure clamps the eccentric lesion 200, the second protrusions 412 can form extrusion with the eccentric lesion 200, thereby providing an auxiliary clamping force for the clamping structure formed by the anchor 42, the anchoring rod 41 and the cutting head 31, improving the stability of clamping the eccentric lesion 200, further reducing the possibility of the cutting head 31 detaching from the area of the eccentric lesion 200, improving the cutting effect, and effectively protecting the blood vessel.

[0078] Furthermore, in order to improve the clamping force between the second protrusions 412 and the eccentric lesion 200 during the clamping process, the second protrusions 412 in this embodiment are also designed to have tips. For example, the cross-section of the second protrusions 412 is designed to be a structure approximately triangular as shown in the figure, or can also be designed as a diamond-shaped structure, etc. In this way, the tips can penetrate into the eccentric lesion 200 when the clamping structure clamps the eccentric lesion 200, improving the anchoring force of the anchoring rod 41 on the eccentric lesion 200, and further improving the clamping stability of the clamping structure on the eccentric lesion 200.

[0079] Embodiment Three

[0080] Embodiment Three of the present invention proposes a resection device 100, as Figure 9 shown. The same parts of Embodiment Three and Embodiment One will not be described in detail. The difference between Embodiment Three and Embodiment One is that in this embodiment, a plurality of first protrusions 425 are provided on the receiving groove 423 formed on the second surface 422 of the anchor 42 at circumferentially spaced intervals.

[0081] The first protrusions 425 are columnar or conical. One end of the first protrusion 425 is connected to the second surface 422, and the other end of the first protrusion 425 is a free end. When the first protrusion 425 is columnar, the free end has an arc surface. After the anchor 42 and the cutting head 31 in this embodiment clamp the eccentric lesion 200, the first protrusions 425 squeeze the eccentric lesion 200, improving the anchoring force of the anchor 42 on the eccentric lesion 200, and further improving the clamping stability of the anchor 42 on the eccentric lesion 200.

[0082] To facilitate the movement of the anchor 42 within the blood vessel, in this embodiment, a second flow hole 4251 is further formed on the first protrusion 425. The extending direction of the second flow hole 4251 is the same as that of the first protrusion 425 and penetrates through the first protrusion 425, the second surface 422, and the first surface 421. Blood within the blood vessel can flow through the second flow hole 4251, further reducing the resistance of the blood when the anchor 42 is pushed into the blood vessel. Of course, in this embodiment, a plurality of second protrusions 412 can also be provided on the side of the anchor rod 41 facing the cutting head 31. Since the structure and function of the second protrusions 412 have been given in the above-mentioned second embodiment, they will not be elaborated in this embodiment.

[0083] Embodiment Four

[0084] Embodiment Four of the present invention provides a resection device 100, as Figure 10 shown. The similarities between Embodiment Four and Embodiment One will not be elaborated. The difference between Embodiment Four and Embodiment One is that in this embodiment, a plurality of anchoring groove portions 4231 are formed on the receiving groove 423 formed on the second surface 422 of the anchor 42.

[0085] The plurality of anchoring groove portions 4231 can be arranged at intervals in the direction from the proximal end to the distal end of the anchor 42. The extending direction of the anchoring groove portions 4231 can be set along the circumferential direction of the receiving groove 423. For example, the extending length of the anchoring groove portion 4231 occupies three-quarters of the circumferential length of the receiving groove 423. After the anchor 42 and the cutting head 31 of this embodiment clamp the eccentric lesion 200, a part of the eccentric lesion 200 is pressed into the anchoring groove portion 4231 for locking, improving the anchoring force of the anchor 42 for the eccentric lesion 200, and further improving the clamping stability of the clamping structure for the eccentric lesion 200, thereby improving the resection efficiency.

[0086] In addition, the anchoring groove portion 4231 of this embodiment can also be designed to penetrate the first surface 421, so that the anchoring groove portion 4231 forms a through-hole structure. In this way, not only can the function of improving the anchoring force of the anchor 42 for the eccentric lesion 200 be realized, but also the blood within the blood vessel can flow through the through-hole formed by the anchoring groove portion 4231, further increasing the blood flow area and reducing the resistance of the blood when the anchor 42 is pushed into the blood vessel.

[0087] Of course, in this embodiment, a plurality of second protrusions 412 can also be provided on the side of the anchor rod 41 facing the cutting head 31. Since the structure and function of the second protrusions 412 have been given in the above-mentioned second embodiment, they will not be elaborated in this embodiment.

[0088] Embodiment Five

[0089] Embodiment 5 of the present invention provides an excision device 100, as Figure 11 shown. The similarities between Embodiment 5 and Embodiment 1 will not be elaborated. The difference between Embodiment 5 and Embodiment 1 is that the anchoring member 42 in this embodiment is reticular, that is, a plurality of anchoring mesh holes 4232 are formed on the second surface 422 of the anchoring member 42. The plurality of anchoring mesh holes 4232 are arranged at intervals in the direction from the proximal end to the distal end of the anchoring member 42, and are arranged at intervals along the circumferential direction of the receiving groove 423. The anchoring mesh holes 4232 form multiple rows along the direction from the proximal end to the distal end of the anchoring member 42, and each row has a plurality of anchoring mesh holes 4232 arranged at intervals in the circumferential direction.

[0090] Among them, after the anchoring member 42 and the cutting head 31 clamp the eccentric lesion 200, a part of the eccentric lesion 200 is pressed into the anchoring mesh holes 4232 for locking, which improves the anchoring force of the anchoring member 42 on the eccentric lesion 200, and further improves the clamping stability of the clamping structure on the eccentric lesion 200. Moreover, the anchoring mesh holes 4232 can also assist the cutting head 31 to excise the eccentric lesion 200, improving the excision efficiency.

[0091] In addition, the anchoring member 42 is reticular, and the anchoring mesh holes 4232 penetrate the first surface 421. In this way, not only can the function of improving the anchoring force of the anchoring member 42 on the eccentric lesion 200 be realized, but also the blood in the blood vessel can flow through the through holes formed by the anchoring mesh holes 4232, further increasing the blood flow area and reducing the blood resistance when the anchoring member 42 is pushed into the blood vessel. And the reticular anchoring member 42 can also intercept the plaque debris chopped by the cutting head 31, preventing the plaque debris from falling into the downstream branch blood vessels and causing blockage of the branch blood vessels.

[0092] Furthermore, connection holes 4241 can be provided on the side wall at the first through hole 424 in this embodiment. The plurality of connection holes 4241 are in one-to-one correspondence and communicate with the plurality of anchoring mesh holes 4232 located at the distal end of the receiving groove 423, so that a part of the blood passing through the through hole can flow out through a row of anchoring mesh holes 4232 located at the distal end of the receiving groove 423, further improving the blood passability.

[0093] Of course, in this embodiment, a plurality of second protrusions 412 can also be provided on the side of the anchoring rod 41 facing the cutting head 31. Since the structure and function of the second protrusions 412 have been given in Embodiment 2 above, they will not be elaborated in this embodiment.

[0094] Embodiment 6

[0095] Embodiment 6 of the present invention provides an excision device 100, as Figures 12 to 22 shown. The similarities between Embodiment 6 and Embodiment 1 will not be elaborated. The difference between Embodiment 6 and Embodiment 1 is that the structure of the excision device 100 is different.

[0096] In this embodiment, the resection device 100 can not only adjust the head orientation of the catheter 20, but also control the rotation of the catheter 2, so that the anchoring assembly 40 can adjust its orientation driven by the rotation of the catheter 20, enabling the anchor 42 to be aligned with the eccentric lesion, thereby improving the surgical efficiency and success rate.

[0097] As Figures 12 to 14 shown, a wire fixing assembly 50 and a bending adjustment assembly 60 are provided on the handle body 10. A bending adjustment wire 22 is disposed inside the catheter 20. The distal end of the bending adjustment wire 22 is fixedly connected to the distal end portion of the catheter 20, and the proximal end of the bending adjustment wire 22 is connected to the wire fixing assembly 50. The wire fixing assembly 50 is movably connected to the bending adjustment assembly 60 and fixedly connects to the proximal end of the bending adjustment wire 22. The bending adjustment assembly 60 is disposed on the handle body 10 and sleeved with the catheter 20, and is mainly used to adjust the traction force of the bending adjustment wire 22 by controlling the axial sliding of the wire fixing assembly 50, thereby adjusting the bending angle of the catheter 20.

[0098] Under the control of the bending adjustment assembly 60, the wire fixing assembly 50 can move back and forth along the axis of the catheter 5. Since the length of the bending adjustment wire 22 remains unchanged, when the wire fixing assembly 50 moves forward, the proximal end of the bending adjustment wire moves forward, which is equivalent to reducing the traction force and releasing the bending adjustment wire 22 to reduce the bending angle of the head of the catheter 20; conversely, when moving backward, it is equivalent to increasing the traction force to pull the bending adjustment wire 22 to increase the bending angle of the head of the catheter 20. In this way, the bending angle of the head of the catheter 20 is adjusted by controlling the sliding distance of the wire fixing assembly 50, so as to pass through the curved part in the blood vessel.

[0099] In addition, the bending adjustment assembly 60 can also be used to control the rotation of the catheter 20, so that the doctor can rotate the catheter 20 according to the position and size of the eccentric lesion, enabling the anchoring assembly 40 to adjust its circumferential position driven by the catheter 20, so that the anchor 42 can more accurately anchor the eccentric lesion.

[0100] The bending adjustment assembly 60 includes an adjustment cylinder 63. Among them, the adjustment cylinder 63 is communicatively disposed on the handle body 10 and sleeved with the catheter 20. The wire fixing assembly 50 is axially slidably disposed in the adjustment cylinder 63 through a push switch 64.

[0101] Exemplarily, the proximal end of the adjustment cylinder 63 is connected to the distal end of the handle body 10 and communicates with the inner cavity of the handle body 10. The main parts of the wire fixing assembly 50 and the push switch 64 are both disposed in the adjustment cylinder 63. The adjustment cylinder 63, the wire fixing assembly 50 and the push switch 64 are all sleeved with the catheter 20, and the catheter 20 and the adjustment cylinder 63 are fixedly connected by means of bonding, welding, etc. In this way, when the adjustment cylinder 63 rotates, it can drive the catheter 20 to rotate.

[0102] In addition, a stress diffusion tube 123 is provided at the distal end of the bending adjustment assembly 60. The stress diffusion tube 123 is sleeved on the catheter 20 and fixedly connected to the distal end of the adjustment cylinder 63 to prevent stress concentration and folding at the connection between the catheter 20 and the adjustment cylinder 63 when the catheter 20 is bent.

[0103] To adjust the bending angle of the catheter 20, the wire fixing assembly 50 includes a hollow second wire fixing slider 52. The second wire fixing slider 52 is sleeved on the catheter 20 and is used to fix the proximal end of the bending wire 22 and pull the bending wire 22 by axial movement.

[0104] As shown in FIGS. 16 to Figure 19 As shown, the wire fixing assembly 50 further includes a wire fixing pin 53. An axial second wire passing hole 521 and a wire fixing hole 522 communicating with the second wire passing hole 521 and extending radially are formed on the outer wall of the second wire fixing slider 52. Among them, the bending wire 22 led out from the catheter 20 passes through the second wire passing hole 521 and enters the wire fixing hole 522. By inserting the wire fixing pin 53 into the wire fixing hole 522 through which the bending wire 22 passes, the bending wire 22 can be fixed on the second wire fixing slider 52.

[0105] In addition, as Figure 12 shown, the push switch 64 includes a push button 641. The push button 641 is axially slidably arranged on the outer wall of the adjustment cylinder 63. Specifically, the adjustment cylinder 63 includes two first cylinder shells 631. The two first cylinder shells 631 are covered opposite to each other left and right to enclose the adjustment cylinder 63. A first key groove 6311 is recessed on the outer wall of the adjustment cylinder 63. The push button 641 is accommodated in the first key groove 6311 and can axially slide along the first key groove 6311. The sliding of the push button 641 drives the second wire fixing slider 52 to slide.

[0106] Among them, in combination with Figure 16 and Figure 17 shown, a hollow limiting shaft 642 and a clamping member 643 are further arranged in the adjustment cylinder 63. The hollow limiting shaft 642 is arranged along the axial direction of the adjustment cylinder 63. The second wire fixing slider 52 is slidably sleeved on the hollow limiting shaft 642, thereby guiding the axial sliding of the second wire fixing slider 52.

[0107] The snap-in part 643 is sleeved on the outer side of the second wire-fixing slider 52. The snap-in part 643 is connected to the pressing key 641 and can be slidably connected to the second wire-fixing slider 52 in the radial direction. A rack 6421 is provided on the hollow limiting shaft 642, and the rack 6421 is arranged on the other side of the hollow limiting shaft 642 relative to the pressing key 641. A tooth plate 6432 corresponding to the rack 6421 is provided on the snap-in part 643. A return spring 644 is arranged between the snap-in part 643 and the second wire-fixing slider 52. The return spring 644 is used to drive the snap-in part 643 to move towards the side of the pressing key 641. In the natural state, the rack 6421 and the tooth plate 6432 are engaged under the drive of the return spring 644, so that the pressing key 641 and the hollow limiting shaft 642 are axially relatively fixed.

[0108] When the pressing key 641 is pressed, the return spring 644 is compressed, and the rack 6421 and the tooth plate 6432 are separated. At this time, the pressing key 641 can move axially, thereby driving the second wire-fixing slider 52 to move axially, and further driving the distal end of the catheter 20 to bend through the wire bending wire 22.

[0109] An end wire hole 6422 is axially opened on the distal end of the hollow limiting shaft 642. The wire bending wire 22 sequentially enters the wire fixing hole 522 from the end wire hole 6422 and the second wire passing hole 521 for fixation. The snap-in part 643 includes a snap ring 6431 fixedly connected, and the tooth plate 6432 is arranged on the snap ring 6431.

[0110] Specifically, as shown in Figures 17 to 21 The snap ring 6431 is provided with a positioning groove 64311. The tooth plate 6432 is convexly provided with a positioning protrusion 64322 on the side facing the hollow limiting shaft 642. After the snap ring 6431 passes through the radial sliding groove 612 on the second wire-fixing slider 52, it is buckled with the tooth plate 6432. The snap ring 6431 and the tooth plate 6432 are fixed through the positioning groove 64311 and the positioning protrusion 64322. Thus, the snap-in part 643 is sleeved on the second wire-fixing slider 52, and the snap-in part 643 can move radially relative to the radial sliding groove 612 on the second wire-fixing slider 52.

[0111] Among them, a tooth slot 64321 is provided on the tooth plate 6432, and the rack 6421 on the outer wall of the hollow limiting shaft 642 is snapped into the tooth slot 64321 on the tooth plate 6432. An avoidance hole 523 is also opened on the second wire-fixing slider 52. Among them, the tooth slot 64321 of the snap-in part 643 can enter the cavity of the second wire-fixing slider 52 through the avoidance hole 523 to be snapped with the rack 6421 on the hollow limiting shaft 642.

[0112] The pressing key 641 is fixedly connected to the top of the clamp 6431 by means of bonding, welding or the like. The return spring 644 is arranged between the second wire-fixing slider 52 and the clamp 6431. An installation post 64312 is arranged on one side of the clamp 6431 facing the second wire-fixing slider 52, and the return spring 644 is assembled on the installation post 64312.

[0113] Through the above-mentioned implementation manner, in the initial state, the return spring 644 will push up the clamp 6431, so that the tooth gap 64321 on the tooth plate 6432 is engaged with the rack 6421 on the hollow limiting shaft 642 to axially fix the second wire-fixing slider 52. When the pressing key 641 is pressed, the tooth plate 6432 will be pushed out to disengage the tooth gap 64321 from the rack 6421, and then the pressing key 641 is axially pushed to realize the bending adjustment of the catheter 20. For example, when the pressing key 641 is moved proximally, the second wire-fixing slider 52 can be driven by the clamp 6431 to move proximally to increase the traction force on the bending wire 22, so that the head of the catheter 20 is bent to realize the bending function.

[0114] To realize the positioning after the rotation of the catheter 20, there is a large damping between the adjusting cylinder 63 and the handle body 10. Thus, under the action of no external force, the adjusting cylinder 63 can be stationary relative to the handle body 10. When the doctor rotates the adjusting cylinder 63, the adjusting cylinder 63 can rotate relative to the handle body 10, and simultaneously drive the second wire-fixing slider 52 to rotate through the pressing switch 64, avoiding the winding of the bending wire 22 and the internal structure of the handle body 10 when the adjusting cylinder 63 rotates. When the doctor operates the pressing switch 64, the pressing key 641 can drive the wire-fixing assembly 50 to axially move, so as to bend the distal end of the catheter 20.

[0115] Specifically, as shown in Figure 17 Since the catheter 20 is fixedly connected to the adjusting cylinder 63, and the clamp 6431 of the pressing switch 64 is connected to the second wire-fixing slider 52 and the hollow limiting shaft 642 of the wire-fixing assembly 50, and the hollow limiting shaft 642 is fixedly arranged on the first cylinder shell 631 of the adjusting cylinder 63 and movably sleeved on the catheter 20. Therefore, when the adjusting cylinder 63 is rotated and the pressing key 641 is not subjected to a pressing force, the entire pressing switch 64 can rotate together with the adjusting cylinder 63 and the catheter 20. When the axial limit of the second wire-fixing slider 52 is released after the pressing key 641 is subjected to a pressing force, the pressing key 641, the clamping member 643, the second wire-fixing slider 52 and the catheter 20 of the pressing switch 64 can also rotate together with the adjusting cylinder 63. In this way, the synchronous rotation of the second wire-fixing slider 52 and the catheter 20 with the adjusting cylinder 63 can be realized, avoiding the winding of the bending wire 22 and the catheter 20.

[0116] As shown in Figures 12 to 14As shown in the figure, to achieve the damped rotation of the adjusting cylinder 63 relative to the handle body 10, the handle body 10 includes a second handle shell 12. A damping rib position 121 is convexly provided on the second handle shell 12. A convex rib 6312 is circumferentially provided on the proximal end of the first cylinder shell 631 of the adjusting cylinder 63. A damping hole 63121 is axially formed on the convex rib 6312. Among them, when the proximal end of the adjusting cylinder 63 is rotationally inserted into the distal end of the handle body 10, the convex rib 6312 is inside the handle body 10 and on the proximal side of the damping rib position 121, so that the ball 122 inserted into the damping hole 63121 abuts against the damping rib position 121 to achieve the damping effect when the adjusting cylinder 63 rotates.

[0117] Combined with Figure 13 and Figure 22 As shown in the figure, to achieve the rotation of the cutting assembly 30, the driving device 80 includes a motor 81, a wire 82, a battery 83, a driving switch 84, a Y-shaped valve 86, a gear pair 87, a bearing 88 and a mounting shaft 89 arranged inside the handle body 10, and further includes a key switch 85 arranged on the outer wall of the handle body 10 and connected to the driving switch 84. Among them, the Y-shaped valve 86 includes a main valve pipe and a waste discharge pipe. Inside the handle body 10, the motor 81 is electrically connected to the battery 83 and the driving switch 84 through the wire 82. The output shaft of the motor 81 is connected to the driving wheel of the gear pair 87; the proximal end of the torque shaft 32 of the cutting assembly 30 is inserted into the mounting shaft 89 inside the main valve pipe of the Y-shaped valve 86 and fixedly connected to the mounting shaft 89 by welding or other means. The distal end of the mounting shaft 89 is rotatably installed inside the main valve pipe of the Y-shaped valve 86 through a bearing 88. The mounting shaft 89 is fixedly connected to the driven wheel of the gear pair 87 and is installed inside the cylinder base 73 through another bearing 88 at the proximal end. When the battery 83 is powered on, by operating the key switch 85 to start the driving switch 84, the motor 81 can be made to work to drive the torque shaft 32 to rotate, thereby realizing the rotary cutting function of the cutting head 31.

[0118] The Y-shaped valve 86 communicates with the conveying channel 27 of the catheter 20 and obliquely extends out of the handle body 10 along the direction of removing the embolus 300, so as to quickly discharge the cut embolus 300.

[0119] In other embodiments, the rotation speed and torque of the torque shaft 32 can also be adjusted by different transmission ratios between the driving wheel and the driven wheel in the gear pair 87 to meet the removal requirements of emboli 300 with different hardnesses. For example, in the normal removal state, a high speed gear can be selected to facilitate quick removal and shorten the operation time; in the case of special situations such as eccentric calcified lesions, a low speed gear can be selected to prevent the cutting head 31 from jamming.

[0120] Such as Figures 13 to 15As shown in the figure, the guide wire locking device 70 includes a rotary cap 71, a sealing gasket 72, and a barrel base 73. Among them, the barrel base 73 is fixedly installed at the proximal end of the handle body 10. The proximal end of the mounting shaft 89 of the driving device 80 is rotatably installed in the stepped hole at the distal end of the barrel base 73 through a bearing 88. The sealing gasket 72 is inserted into the barrel base 73 from the proximal end of the barrel base 73. The rotary cap 71 is threadedly sleeved on the proximal end of the barrel base 73 and can axially abut against the sealing gasket 72 inside the barrel base 73. The guide wire can sequentially pass through the rotary cap 71, the sealing gasket 72, the barrel base 73, and the mounting shaft 89 from the outside and enter the torque shaft 32, so as to realize the overall axial passing of the guide wire through the handle body 10, facilitating the smoother pushing of the catheter 20 into the lesion site. When the rotary cap 71 is tightened, the sealing gasket 72 inside the barrel base 73 can be axially extruded, causing the aperture of the sealing gasket 72 to contract and lock the guide wire to fix the guide wire, preventing the guide wire from rotating with the cutting head 31 during the operation and damaging the blood vessel 200. At the same time, it also seals the proximal end of the handle body 10.

[0121] Through the above technical solutions of this embodiment, the bending of the distal end of the catheter 20 and the circumferential rotation of the catheter 20 can be controlled, so as to facilitate the catheter 20 to pass through the curved part of the blood vessel. And the anchoring assembly 40 can adjust its circumferential position along with the rotation of the catheter 20, so as to align with the eccentric lesion 200, facilitating the doctor to operate the anchoring assembly 40 to clamp the eccentric lesion and then perform the resection operation.

[0122] Embodiment Seven

[0123] Embodiment Seven of the present invention proposes a resection device 100, as Figures 23 to 25 shown. The same parts of Embodiment Seven and Embodiment Six will not be described in detail. The difference between Embodiment Seven and Embodiment Six lies in the different structures of the resection device 100.

[0124] The bending adjustment assembly 60 includes an adjustment cylinder 63. Among them, the adjustment cylinder 63 is communicatively arranged on the handle body 10 and sleeved on the catheter 20. The wire fixing assembly 50 is axially slidably arranged in the adjustment cylinder 63 to adjust the bending angle of the catheter 20.

[0125] The proximal end of the adjustment cylinder 63 is connected to the distal end of the handle body 10 and communicates with the inner cavity of the handle body 10. And the main part of the wire fixing assembly 50 is located inside the adjustment cylinder 63. The adjustment cylinder 63 and the wire fixing assembly 50 are respectively sleeved on the catheter 20. In addition, the wire fixing assembly 50 is movably connected to the catheter 20, and the adjustment cylinder 63 and the catheter 20 are fixedly connected by means of bonding, welding, etc.

[0126] To axially slide the wire fixing component 50 and arrange it on the adjusting cylinder 63, the wire fixing component 50 includes a sliding key 54. The sliding key 54 includes a sliding shaft 541, a fixing bracket 542, and a sliding key 543. Among them, the sliding shaft 541 is movably sleeved on the catheter 20, and the fixing bracket 542 is radially arranged on the outer wall of the sliding shaft 541 and is used to fix the wire bending wire 22; the sliding key 543 is connected to one end of the fixing bracket 542 away from the sliding shaft 541 and is axially damped and slidably arranged on the outer wall of the adjusting cylinder 63.

[0127] As Figure 23 shown in Figure 24 Figure, a second key groove 6321 is concavely provided on the outer wall of the adjusting cylinder 63. The sliding key 543 is accommodated in the second key groove 6321 and can axially slide along the second key groove 6321. To realize the wire fixing and wire bending functions of the sliding key 54, a third wire passing hole 5421 is axially provided on the fixing bracket 542. Among them, the wire bending wire 22 passes through the third wire passing hole 5421 and then winds around the fixing bracket 542, and thus the wire bending wire 22 can be fixed on the fixing bracket 542. And because the entire sliding key 54 is axially movably sleeved on the catheter 20, when the sliding key 543 axially slides in the second key groove 6321 with damping, the sliding key 543 can drive the connected fixing bracket 542 and sliding shaft 541 to axially slide relative to the catheter 20 together, thereby adjusting the traction force of the wire bending wire 22 and realizing the adjustment of the bending angle of the catheter 20.

[0128] As Figure 25 shown in

[0129] To realize the damped axial sliding of the sliding key 543, the adjusting cylinder 63 includes two second cylinder shells 632. The two second cylinder shells 632 are covered relatively up and down to enclose the adjusting cylinder 63. And a second damping tooth 6322 is provided on the inner wall of the second cylinder shell 632. Correspondingly, an elastic hook 5422 is provided on the fixing bracket 542. Among them, when the sliding key 543 axially slides, the hook 5422 can be engaged with the second damping tooth 6322 at the corresponding position, thereby realizing the damping effect of the axial sliding of the sliding key 543.

[0130] With the above structure, when the adjusting cylinder 63 is rotated, the sliding key 54 provided on the adjusting cylinder 63 and the catheter 20 fixedly connected to the adjusting cylinder 63 will rotate together with the adjusting cylinder 63, so that while the catheter 20 is rotated, the bending wire 22 can be prevented from being wound.

[0131] In this embodiment, the handle body 10 includes two third handle shells 13, and the two third handle shells 13 are covered relative to each other up and down to enclose the handle body 10. The proximal end of the second cylinder shell 632 of the adjusting cylinder 63 is rotationally connected to the distal end of the third handle shell 13 of the handle body 10 through a concave-convex structure with damping.

[0132] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An excision device, comprising a catheter and a cutting assembly disposed at the distal end of the catheter, the cutting assembly including a cutting head, characterized in that, The cutting device further includes an anchoring assembly, which includes an anchoring rod and an anchoring member. The anchoring rod is arranged on one side of the catheter in the radial direction of the catheter, and the distal end of the anchoring rod is located at the distal end of the catheter. The anchoring member is connected to the distal end of the anchoring rod, and the anchoring member and the cutting head are arranged correspondingly along the axial direction of the catheter.

2. The cutting device according to claim 1, wherein The anchoring assembly can move axially along the catheter to anchor the diseased part in the blood vessel; the anchoring assembly further includes a guiding rod passing through the catheter. The distal end of the guiding rod is connected to the proximal end of the anchoring rod, and the guiding rod can move axially along the catheter to drive the anchoring rod and the anchoring member to move axially along the catheter.

3. The cutting device according to claim 2, wherein The cutting device further includes a handle body. The catheter is connected to the handle body. The anchoring assembly further includes a handheld member arranged at the proximal end of the guiding rod. A connecting portion for connecting the handheld member is arranged at the proximal end of the guiding rod. A support frame is detachably connected to the handle body, and a clamping member for locking the connecting portion is arranged on the support frame.

4. The cutting device according to claim 2, wherein The guiding rod has telescopic performance along the axial direction of the catheter. An extension portion is arranged on the catheter. The extension portion is arranged on one side in the radial direction of the catheter and is arranged along the same axial direction as the catheter. The guiding rod passes through the extension portion.

5. The cutting device according to claim 1, characterized in that, The anchoring member includes a first surface facing away from the cutting head and a second surface facing the cutting head. From the center to the edge of the first surface, the distance along the axial direction of the catheter between the first surface and the distal end of the anchoring rod gradually decreases.

6. The cutting device according to claim 1, characterized in that The anchoring member includes a first surface facing away from the cutting head and a second surface facing the cutting head. The second surface is recessed towards the first surface to form a receiving groove; a plurality of first protrusions arranged at intervals are provided on the receiving groove, or a plurality of grooves arranged at intervals are formed on the receiving groove, or a plurality of through holes arranged at intervals are formed on the receiving groove.

7. The cutting device according to claim 1, characterized in that The anchoring rod and the cutting head are arranged at intervals in the radial direction of the catheter. A plurality of second protrusions are arranged on the side of the anchoring rod facing the cutting head, and the plurality of second protrusions are arranged at intervals along the extending direction of the anchoring rod; a first through hole is formed in the middle of the anchoring member, and the first through hole axially penetrates the anchoring member along the catheter.

8. The cutting device according to claim 1, characterized in that The cutting device further includes a sleeve. The sleeve is connected to the distal end of the catheter, the cutting head is connected to the distal end of the sleeve, and the anchoring rod passes through the sleeve.

9. The cutting device according to claim 1, characterized in that, The cutting device further includes a handle body. The catheter is connected to the handle body. A bending adjustment assembly and a wire fixing assembly are arranged on the handle body. A bending adjustment wire connected to the distal end of the catheter is arranged in the catheter. The wire fixing assembly is movably connected to the catheter and fixedly connected to the proximal end of the bending adjustment wire. The bending adjustment assembly is connected to the wire fixing assembly and the catheter. The bending adjustment assembly is used to drive the catheter to rotate circumferentially, and the bending adjustment assembly controls the bending of the distal end of the catheter through the wire fixing assembly and the bending adjustment wire.

10. The cutting device according to claim 9, wherein, The wire fixing assembly is movably connected to the catheter and is disposed within the bending adjustment assembly. The bending adjustment assembly can independently drive the wire fixing assembly to axially move relative to the catheter or independently drive the wire fixing assembly and the catheter to rotate synchronously.

Images