Cutting device

Abstract

The invention discloses a resection device, and relates to the technical field of medical instruments. The excision device comprises a catheter, a cutting assembly and a recycling assembly, the cutting assembly and the recycling assembly are arranged at the far end of the catheter, the recycling assembly comprises a suction part and a flushing part, the suction part is at least partially connected to the far end of the catheter and provided with at least one suction opening used for adsorbing a target object, and the flushing part is connected to the far end of the suction part and provided with at least one suction opening used for adsorbing the target object. And at least one spraying opening for spraying flushing fluid is formed. The excision device is provided with the recycling assembly, flushing fluid is sprayed through the flushing part of the recycling assembly to conduct thrombolysis, meanwhile, thrombus is recycled through the suction part, the risk that the thrombus falls off and blocks a far-end blood vessel is reduced, and therefore the possibility of occurrence of far-end embolism complications is reduced; and the resection device can be used for resection of plaques with mixed lesions.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an excision device. Background Art

[0002] The information provided in this part 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 lesions 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 classic 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, the 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, the excision devices of the existing peripheral atherectomy have poor treatment effects on mixed lesions, and thrombus detachment is likely to occur during excision, thus blocking the distal blood vessels and causing distal embolism complications.

[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 problem that thrombus detachment is likely to occur during excision by the existing excision device, resulting in distal embolism complications.

[0008] The present invention provides an excision device, including a catheter and a cutting assembly disposed at the distal end of the catheter. The excision device further includes a recovery assembly, and the recovery assembly includes a suction member and a flushing member. The suction member is at least partially connected to the distal end of the catheter and is provided with at least one suction port for adsorbing the target object. The flushing member is connected to the distal end of the suction member and is provided with at least one spraying port for spraying flushing liquid.

[0009] With the excision device of the present invention, a recovery assembly is configured. Thrombolysis is performed by spraying flushing liquid through the flushing member of the recovery assembly. At the same time, the thrombus is recovered by the suction member, reducing the risk of thrombus detachment blocking the distal blood vessels, thereby reducing the possibility of distal embolism complications. Moreover, after the thrombus is removed, it is also beneficial for the excision device to perform plaque excision of mixed lesions.

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

[0011] In some embodiments of the present invention, the cutting assembly includes a cutting head, the suction member is located on one side of the cutting head along the radial direction of the catheter, the flushing member is disposed opposite to the cutting head along the axial direction of the catheter, and the flushing member, the suction member and the cutting head form a clamping structure for clamping the lesion.

[0012] In some embodiments of the present invention, the suction member and / or the cutting head can move along the axial direction of the catheter to clamp the lesion.

[0013] In some embodiments of the present invention, the suction port is located on the side of the suction member facing the cutting member, and the spraying port is located on the side of the flushing member facing the cutting member.

[0014] In some embodiments of the present invention, a plurality of first protrusions are provided on the side of the flushing member facing the cutting member, and at least one spraying port is provided in each of the first protrusions.

[0015] In some embodiments of the present invention, a recess recessed in a direction away from the cutting head is provided on the side of the flushing member facing the cutting head, and the spraying port is located in the recess.

[0016] In some embodiments of the present invention, a plurality of second protrusions are provided on the side of the suction member facing the cutting member, and the plurality of second protrusions are arranged at intervals along the axial direction of the suction member, and the suction port is located on one side or both sides of the second protrusion along the circumferential direction of the suction member.

[0017] In some embodiments of the present invention, the end of the second protrusion facing away from the suction member is a tip.

[0018] In some embodiments of the present invention, the suction member is provided with a first suction channel and a first liquid outlet channel, the suction port is communicated with the distal end of the first suction channel, and the spraying port is communicated with the distal end of the first liquid outlet channel.

[0019] In some embodiments of the present invention, the recovery assembly further includes an operating member, the distal end of the operating member is connected to the proximal end of the suction member, the operating member is provided with a second suction channel and a second liquid outlet channel, the second suction channel is communicated with the first suction channel, and the second liquid outlet channel is communicated with the first liquid outlet channel.

[0020] In some embodiments of the present invention, the resection device further includes a handle, and the catheter is inserted through the handle; the recovery assembly further includes a conveying mechanism installed on the handle, the conveying mechanism is connected to the distal end of the operating member, and is configured to drive the operating member and the suction member to move along the axial direction of the catheter.

[0021] In some embodiments of the present invention, the conveying mechanism includes a mounting frame, a conveying knob, and a conveying seat. The mounting frame is installed on the handle body. The operating member passes through the mounting frame and is connected to the conveying knob. The conveying knob is connected to the mounting frame. The rotation of the conveying knob drives the operating member to move linearly. The conveying seat is connected to the distal end of the operating member and is provided with a third suction channel and a third liquid outlet channel. The third suction channel is communicated with the second suction channel, and the third liquid outlet channel is communicated with the second liquid outlet channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] By reading the detailed description of the preferred embodiments below, 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 to be considered as limiting the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0023] Figure 1 Schematically shows a schematic structural view of the resection device provided in the first embodiment of the present invention;

[0024] Figure 2 For Figure 1 the sectional view A-A in

[0025] Figure 3 For Figure 1 the enlarged view of part a shown in

[0026] Figure 4 Schematically shows a schematic structural view of the cutting head and the recovery assembly of the resection device provided in the first embodiment of the present invention;

[0027] Figure 5 For Figure 4 the schematic view of the state where the recovery assembly and the cutting head in

[0028] Figure 6 For Figure 4 the schematic view of the state when the recovery assembly and the cutting head pass through the narrow lesion in

[0029] Figure 7 Schematically shows a cross-sectional view of the operating member of the resection device provided in the first embodiment of the present invention;

[0030] Figure 8 Schematically shows a structural schematic diagram of a delivery seat of an excision device provided in the first embodiment of the present invention;

[0031] Figure 9 Schematically shows a structural schematic diagram of a recovery assembly and a cutting head of an excision device provided in the second embodiment of the present invention;

[0032] Figure 10 Schematically shows a structural schematic diagram of a recovery assembly and a cutting head of an excision device provided in the third embodiment of the present invention;

[0033] Figure 11 Schematically shows a structural schematic diagram of a recovery assembly and a cutting head of an excision device provided in the fourth embodiment of the present invention.

[0034] The reference numerals are as follows:

[0035] 100, excision device;

[0036] 10, handle body;

[0037] 20, catheter; 21, extension part;

[0038] 30, cutting assembly; 31, cutting head; 32, torque shaft;

[0039] 40, recovery assembly; 41, suction member; 411, suction port; 412, first suction channel; 413, first liquid outlet channel; 414, second protrusion; 42, flushing member; 421, spraying port; 422, first protrusion; 423, recess; 43, operating member; 431, second suction channel; 432, second liquid outlet channel; 44, conveying mechanism; 441, mounting frame; 442, conveying knob; 443, conveying seat; 4431, third suction channel; 4432, third liquid outlet channel;

[0040] 200, eccentric lesion. Detailed implementation manners

[0041] Hereinafter, the exemplary embodiments of the present disclosure will be described in more detail with reference to the 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.

[0042] 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 the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0043] 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 indicates 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.

[0044] 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 "inner", "outer", "inside", "outside", "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 figures 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 an upper and a lower orientation. 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.

[0045] In addition, it should be noted that in the field of interventional medical devices, generally, the end of a medical device implanted into the human body or an animal body or the delivery system for delivering the medical device that is closer to the operator is referred to as the "proximal end", and the end that is farther from the operator is referred to as the "distal end". Based on this principle, the "proximal end" and "distal end" of any component of the medical device or the delivery system are defined. The "axial direction" generally refers to the length direction of the medical device when it is being delivered, 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.

[0046] Embodiment 1

[0047] As shown in the attached Figure 1-4 FIGURES, Embodiment 1 of the present invention provides an excision device 100 for excising embolisms in blood vessels, such as thrombi or plaque tissues. The excision device 100 includes a handle body 10, a catheter 20 connected to the handle body 10, and a cutting assembly 30 disposed at the distal end of the catheter 20. 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 31 for excising thrombi or plaque tissues, and the material of the cutting blade 31 can be stainless steel or nitinol material.

[0048] The cutting action of the cutting blade 31 in this embodiment can be achieved by Figure 2 a torque shaft 32 within the catheter 20. The torque shaft 32 can be regarded as a part of the cutting assembly 30, and the material of the torque shaft 32 can be stainless steel or nitinol material. The distal end of the torque shaft 32 is connected to the proximal end of the cutting blade 31, and the connection method can be bonding or welding. By rotating the torque shaft 32, the cutting blade 31 is driven to rotate synchronously to perform rotational cutting of the cutting blade 31. The torque shaft 32 is rotated by a driving structure (not shown in the figure) disposed within the handle body 10, and the driving structure can be a motor.

[0049] In order to better perform excision operations on mixed lesions, the excision device 100 of this embodiment further includes a recovery assembly 40. While performing cutting operations on mixed lesions, the recovery assembly 40 can dissolve and recover thrombi, facilitating the cutting operation and reducing the risk of thrombus detachment and blockage of distal blood vessels, thereby reducing the possibility of distal embolism complications.

[0050] The recovery component 40 of this embodiment includes a suction member 41 and a flushing member 42. The suction member 41 is at least partially connected to the distal end of the catheter 20 and is provided with at least one suction port 411 for adsorbing the target object. The target object may include thrombus and excised plaque. The length of the suction member 41 may be set along the axial direction of the catheter 20. The suction member 41 may be entirely located outside the distal end of the catheter 20, or a part of the suction member 41 is located outside the distal end of the catheter 20, and the other part of the suction member 41 is located inside the catheter 20. The material of the suction member 41 may be a polymer material, such as polyvinyl alcohol or polyacrylic acid, etc. The suction port 411 is provided at a position of the suction member 41 close to the flushing member 42, and the negative pressure of the suction port 411 can adsorb and recover target objects such as thrombus.

[0051] The number of the suction ports 411 of this embodiment may be one or more. In some examples, a plurality of suction ports 411 are formed on the suction member 41, and the plurality of suction ports 411 can form a greater negative pressure, which helps to capture smaller target objects.

[0052] The flushing member 42 of this embodiment is connected to the distal end of the suction member 41. The flushing member 42 and the suction member 41 may be integrally connected by welding or bonding, or may be formed into an integral structure by injection molding or other processes during processing. The flushing member 42 is provided with at least one spraying port 421 for spraying flushing liquid, and the flushing liquid may be a thrombolytic solution. In order to facilitate spraying by the flushing member 42, the radial dimension of the flushing member 42 should be smaller than the radial dimension of the blood vessel for resection surgery. For example, the radial dimension of the flushing member 42 is 0.4-0.7 times the radial dimension of a normal peripheral artery blood vessel.

[0053] The number of the spraying ports 421 of this embodiment may be one or more. In some examples, a plurality of spraying ports 421 are formed on the flushing member 42, and the plurality of spraying ports 421 can expand the flushing range of the lesion, thereby improving the flushing and thrombolysis efficiency of the thrombus.

[0054] When performing hybrid lesion resection, the flushing member 42 of the recovery component 40 can be used to spray the flushing liquid for thrombolysis. At the same time, the suction member 41 is used to recover the thrombus, reducing the risk of thrombus detachment and blocking the distal blood vessel, thereby reducing the possibility of occurrence of distal embolism complications. Moreover, after the thrombus is removed, it is also beneficial for the resection device 100 to perform plaque resection of the hybrid lesion.

[0055] In addition, when the resection device 100 performs eccentric lesion resection, the cutting component 30 cannot completely align with the eccentric lesion for cutting operation, and it is necessary to frequently adjust the direction of the cutting component 30, resulting in low surgical efficiency and poor surgical effect. Moreover, it is easy to cut the non-lesioned side of the blood vessel, causing damage to the patient's blood vessel.

[0056] In view of this, the present embodiment further improves the structure of the resection device 100 by arranging the suction member 41 on one side of the cutting head 31 along the radial direction of the catheter 20. As shown in the attached Figure 2 In order to facilitate the accommodation of the suction member 41, as shown in the attached figure, a radially extending extension 21 can be provided on the catheter 20 of the present embodiment. The suction member 41 is accommodated in the extension 21. The suction member 41 has a radial interval from the torque shaft 32, and the two can be parallel to each other.

[0057] Further, the flushing member 42 of the present embodiment is arranged opposite to the cutting head 31 along the axial direction of the catheter 20, so that there is an axial interval between the flushing member 42 and the cutting head 31 along the axial direction of the catheter 20. It can be understood that the flushing member 42 is located at the distal end of the entire resection device 100, so that the flushing member 42, the suction member 41 and the cutting head 31 of the present embodiment form a clamping structure that can clamp the eccentric lesion 200 along the axial direction of the catheter 20.

[0058] In this clamping structure, the axial distance between the flushing member 42 and the cutting head 31 can be set to be adjustable or fixed. When the axial distance between the flushing member 42 and the cutting head 31 is fixed, the axial distance between the flushing member 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] During the operation of excising the eccentric lesion 200, the flushing member 42, the suction member 41 and the cutting head 31 of the present embodiment are operated through the angiography technique, so that the lesion is located within the clamping structure formed by the three. Then, the thrombus is dissolved and aspirated by using the flushing member 42 and the suction member 41. At the same time or after the dissolution and aspiration of the thrombus, the eccentric lesion 200 is cut by using the cutting head 31. This can reduce the possibility of the cutting head 31 detaching from the eccentric lesion 200, make the cutting head 31 in a good cutting position, be conducive to achieving the complete resection of the eccentric lesion 200, improve the surgical effect, and also reduce the possibility of the cutting head 31 injuring the patient. At the same time, since the suction member 41 isolates the cutting head 31 from the non-lesion side, the possibility of the cutting head 31 injuring the patient's blood vessel is further reduced, and the safety is improved.

[0060] In some examples, optionally, the suction member 41 of the present embodiment is designed to be movable along the axial direction of the catheter 20. The movement of the suction member 41 drives the flushing member 42 to approach or move away from the cutting head 31, thereby changing the clamping distance of the clamping structure to adapt to different sizes of eccentric lesions 200. Of course, it can also be that the cutting head 31 of the present embodiment can be linearly moved and rotated under the drive of the torque shaft 32 (this implementation manner is not shown in the figure), and the change of the clamping distance of the clamping structure can also be achieved.

[0061] Again referring to the attached Figure 4As shown, in some examples, optionally, in this embodiment, the suction port 411 is designed to be located on the side of the suction member 41 facing the cutting member, and the spraying port 421 is located on the side of the flushing member 42 facing the cutting member. Such a structure can make the eccentric lesion 200 located between the spraying port 421 and the suction port 411. Most of the thrombus rinsed through the spraying port 421 can fall into the suction range of the suction port 411, which is conducive to the suction of the thrombus by the suction port 411, so as to improve the recovery efficiency and effect of the recovery assembly 40.

[0062] Again referring to the attached Figure 2 As shown, in some examples, optionally, the suction member 41 of this embodiment is provided with a first suction channel 412 and a first liquid outlet channel 413. The suction port 411 is communicated with the distal end of the first suction channel 412, and the spraying port 421 is communicated with the distal end of the first liquid outlet channel 413. Such a structural design does not require a separate spraying liquid channel for the flushing member 42, which can simplify the structure, reduce the volume of the entire recovery assembly 40, and is beneficial for the recovery assembly 40 and the cutting assembly 30 to enter the blood vessel.

[0063] In some examples, optionally, in this embodiment, the operating member 43 in the catheter 20 drives the suction member 41 to move axially along the extension portion 21 of the catheter 20. The axial movement of the operating member 43 along the extension portion 21 of this embodiment can be achieved by manual operation. The operating member 43 can be understood as a part of the recovery assembly 40. The material of the operating member 43 can be a metal material or a polymer material, such as nitinol or stainless steel. The distal end of the operating member 43 is connected to the proximal end of the suction member 41. The connection method can be integrally connected by bonding or welding, or integrally formed during processing. The axial movement of the operating member 43 along the catheter 20 drives the suction member 41 to move axially along the catheter 20, thereby adjusting the distance between the flushing member 42 and the cutting tool head 31 and realizing the adjustment of the clamping distance of the clamping structure.

[0064] Referring to the attached Figure 7 As shown, in order to meet the suction operation of the suction member 41 and the spraying operation of the flushing member 42, the operating member 43 of this embodiment is provided with a second suction channel 431 and a second liquid outlet channel 432. The second suction channel 431 is communicated with the first suction channel 412, and the second liquid outlet channel 432 is communicated with the first liquid outlet channel 413. The thrombus adsorbed by the first suction channel 412 can enter the second suction channel 431 and be discharged, and the second liquid outlet channel 432 is used to supply liquid to the first liquid outlet channel 413.

[0065] Again referring to the attached Figure 1As shown, in some examples, optionally, the recovery assembly 40 of this embodiment further includes a conveying mechanism 44 installed on the handle. The conveying mechanism 44 is connected to the distal end of the operating member 43 and is used to drive the operating member 43 and the suction member 41 to move along the axial direction of the catheter 20. At the same time, the conveying mechanism 44 is used to discharge the thrombus in the second suction channel 431 and convey the thrombolytic solution to the second liquid outlet channel 432.

[0066] In some examples, optionally, the conveying mechanism 44 includes a mounting bracket 441, a conveying knob 442, and a conveying seat 443. Among them, the mounting bracket 441 of this embodiment is installed on the handle body 10. The operating member 43 passes through the mounting bracket 441 and is connected to the conveying knob 442. The conveying knob 442 is connected to the mounting bracket 441, and the rotary motion of the conveying knob 442 drives the operating member 43 to move linearly. The structure of the conveying knob 442 in this embodiment can be similar to a lead screw structure. For example, the conveying knob 442 can include an external knob and an internal nut (not shown in the figure). The rotation of the knob drives the nut to rotate. The nut is directly threadedly connected to the operating member 43 or indirectly connected through a screw sleeve. The rotation of the nut can drive the operating member 43 to perform a linear motion. During the process of rotating the conveying knob 442, the operator holds the conveying seat 443 to limit the shaking of the proximal end of the operating member 43 to improve the stability of the operating member 43 during the linear motion.

[0067] Of course, the structure for driving the operating member 43 of this embodiment to move along the axial direction of the catheter 20 is not limited to this. For example, it can also be driven by a telescopic member that can perform linear reciprocating motion, or the knob on the conveying knob 442 can be rotated by a motor, or the operating member 43 can be directly driven by the movement of the conveying seat 443. This embodiment will not list them one by one.

[0068] Combined with the attached Figure 8 As shown, the conveying seat 443 of this embodiment is connected to the distal end of the operating member 43 and is provided with a third suction channel 4431 and a third liquid outlet channel 4432. The third suction channel 4431 is communicated with the second suction channel 431, and the third liquid outlet channel 4432 is communicated with the second liquid outlet channel 432. A negative pressure generating device (not shown in the figure) can be connected through the third suction channel 4431 to provide suction negative pressure for the suction member 41, and a thrombolytic solution supply device (not shown in the figure) can be communicated through the third liquid outlet channel 4432 to provide thrombolytic solution for the flushing member 42.

[0069] Combined with the above structural description, the operation process of the cutting head 31 and the recovery assembly 40 in this embodiment will be described below. Combined with the attached Figure 5As shown in the figure, when excising the eccentric lesion 200, medical staff place the cutting head 31 and the flushing member 42 near the eccentric lesion 200 through visual angiography. Then, the flushing member 42 is pushed from one side of the eccentric lesion 200 to the other side of the eccentric lesion 200. Subsequently, the operating member 43 is operated according to the size of the eccentric lesion 200 to adjust the clamping distance of the clamping structure formed by the cutting head 31, the flushing member 42, and the suction member 41, so that the clamping distance of the clamping structure is greater than the size of the eccentric lesion, forming an attachment Figure 6 The state shown in the figure. Finally, the operating member 43 is operated again so that the cutting head 31 and the flushing member 42 clamp the eccentric lesion. Then, the torque shaft 32 is rotated by operating the handle body 10 to cut the eccentric lesion. At the same time, the thrombus is thrombolyzed and aspirated and recovered by using the flushing member 42 and the suction member 41, reducing the risk of distal vascular embolism. During the cutting process, as the size of the eccentric lesion continuously decreases, the operating member 43 of this embodiment can be continuously operated to adjust the clamping of the clamping structure, ensuring that the cutting head 31 is always in a good cutting position for the eccentric lesion, continuously excising the eccentric lesion, reducing the idling time of the cutting head 31, reducing the number of times the instrument enters the blood vessel, and thus reducing the surgical complexity and shortening the surgical time. During the process of excising the lesion, the recovery component 40 can also be used to timely aspirate the excised plaque out of the blood vessel

[0070] In addition, in this embodiment, the shape of the flushing member 42 of this embodiment can be designed as a sphere. One side of the flushing member 42 facing the cutting head 31 is provided with a plurality of spraying ports 421. The spherical flushing member 42 can make the orientations of the respective spraying ports 421 inconsistent, thereby effectively expanding the flushing range of the spraying ports 421 and improving the flushing and thrombolysis efficiency of the thrombus

[0071] Moreover, the spherical flushing member 42 enables the distal end of the flushing member 42 to form an arc surface. The arc surface facilitates the entry of the flushing member 42 and the suction member 41 into the blood vessel. Moreover, when the flushing member 42 does not pass through the eccentric lesion 200 and abuts against one side of the eccentric lesion, the arc surface can form a guide with the eccentric lesion 200, causing the distal end of the suction member 41 to have an elastic deformation away from the eccentric lesion 200, so that the flushing member 42 can cross from one side of the eccentric lesion 200 to the other side, facilitating subsequent clamping of the eccentric lesion 200

[0072] In addition, the structure of the suction member 41 can be correspondingly improved. The suction member 41 can be designed such that the thickness dimension and / or the width dimension gradually decreases from the proximal end to the distal end (this implementation manner is not shown in the figure), to facilitate the generation of a deformation away from the cutting head 31, thereby facilitating the flushing member 42 to cross the eccentric lesion 200

[0073] Embodiment Two

[0074] Embodiment Two of the present invention proposes a resection device 100, such asFigure 9 As shown, the similarities between the second embodiment and the first embodiment will not be elaborated. The difference between the second embodiment and the first embodiment is that on the side of the flushing member 42 facing the cutting member, a plurality of first protrusions 422 are provided, and at least one spraying port 421 is formed in each of the first protrusions 422.

[0075] One end of the first protrusion 422 is connected to the second surface flushing member 42, and the connection method can be integral connection or integral molding. The first protrusion 422 in this embodiment has a certain extension length. The shape of the first protrusion 422 can be columnar, rectangular block-shaped, etc., as long as it can meet the requirement of forming the spraying port 421, and specific examples will not be listed one by one in this embodiment.

[0076] After the flushing member 42 and the cutting tool head 31 in this embodiment clamp the eccentric lesion 200, the first protrusion 422 presses the eccentric lesion 200, which improves the anchoring force of the flushing member 42 on the eccentric lesion 200, prevents the lesion from detaching from the flushing member 42, and further improves the clamping stability of the clamping structure on the eccentric lesion 200.

[0077] Embodiment Three

[0078] Embodiment Three of the present invention provides a resection device 100, as Figure 10 shown. The similarities between the third embodiment and the first embodiment will not be elaborated. The difference between the third embodiment and the first embodiment is that on the side of the flushing member 42 facing the cutting tool head 31, a recess 423 recessed in the direction away from the cutting tool head 31 is provided, and the spraying port 421 is formed in the recess 423.

[0079] The provision of the recess 423 makes a structure similar to a receiving groove formed on the side of the flushing member 42 facing the cutting tool head 31. The recess 423 can accommodate one side of the eccentric lesion 200 and play a certain restricting role on one side of the eccentric lesion 200, reducing the possibility of the eccentric lesion 200 detaching from the flushing member 42, and further improving the stability of the clamping mechanism in clamping the eccentric lesion 200.

[0080] Embodiment Four

[0081] Embodiment Four of the present invention provides a resection device 100, as Figure 11 shown. The similarities between the fourth embodiment and the first embodiment will not be elaborated. The difference between the fourth embodiment and the first embodiment is that on the side of the flushing member 42 facing the cutting tool head 31, a recess 423 recessed in the direction away from the cutting tool head 31 is provided. A plurality of first protrusions 422 are provided in the recess 423, at least one spraying port 421 is provided in each of the first protrusions 422, and a plurality of second protrusions 414 are provided on the side of the suction member 41 facing the cutting tool head 31.

[0082] The provision of the recess 423 in this embodiment enables a structure similar to a receiving groove to be formed on the side of the flushing member 42 facing the cutting tool head 31. The recess 423 can accommodate one side of the eccentric lesion 200 and play a certain restrictive role on one side of the eccentric lesion 200. At the same time, the first protrusion 422 can squeeze the eccentric lesion 200, further improving the anchoring force of the flushing member 42 for the eccentric lesion 200, preventing the lesion from detaching from the flushing member 42, and thus improving the clamping stability of the clamping structure for the eccentric lesion 200. At the same time, the recess 423 and the first protrusion 422 can make the orientations of the plurality of first protrusions 422 point to the center of the arc-shaped concave surface, effectively improving the flushing effect.

[0083] The second protrusions 414 of this embodiment and the suction member 41 can be integrally formed, or integrally connected by means of welding, bonding, etc. The plurality of second protrusions 414 are arranged along the axial direction of the suction member 41. The end of the second protrusion 414 facing away from the suction member 41 is a tip, so that the plurality of second protrusions 414 form a serrated structure, and the plurality of suction ports 411 are located on one side or both sides of the second protrusions 414 along the circumferential direction of the suction member 41.

[0084] When the clamping structure clamps the eccentric lesion 200, the second protrusions 414 can penetrate into the eccentric lesion 200, thereby improving the clamping stability of the clamping structure for the eccentric lesion 200. At the same time, the thrombolytic solution sprayed by the flushing member 42 can form a vortex between two adjacent second protrusions 414, which is beneficial to capturing lesion substances such as thrombus or plaque.

[0085] As described above, only the specific preferred embodiments of the present invention are provided, 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 by 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, characterized in that, The resection device also includes a recovery component, which includes a suction piece and a flushing piece. The suction piece is at least partially connected to the distal end of the catheter and is provided with at least one suction port for adsorbing the target object. The flushing piece is connected to the distal end of the suction piece and is provided with at least one spray port for spraying flushing liquid.

2. The cutting device according to claim 1, characterized in that The cutting assembly includes a cutting head, the suction piece is located on one side of the cutting head along the radial direction of the catheter, the flushing piece is arranged opposite to the cutting head along the axial direction of the catheter, and the flushing piece, the suction piece and the cutting head form a clamping structure for clamping the lesion.

3. The cutting device according to claim 2, characterized in that, The suction member and / or the cutting head can be moved along the axial direction of the catheter to clamp the lesion.

4. The cutting device according to claim 3, characterized in that The suction port is located at a side of the suction member facing the cutting member, and the spray port is located at a side of the flushing member facing the cutting member.

5. The cutting device according to claim 4, wherein, A plurality of first protrusions are arranged on a side of the flushing member facing the cutting member, and each of the first protrusions is provided with at least one spraying port.

6. The resection device according to claim 4 or 5, characterized in that A concave portion which is recessed in a direction away from the cutting head is provided on a side of the flushing member facing the cutting head, and the spray port is located in the concave portion.

7. The cutting device according to claim 4, wherein A plurality of second protrusions are arranged on one side of the suction member facing the cutting member. The plurality of second protrusions are spaced apart along the axial direction of the suction member. The suction port is located on one or both sides of the second protrusion along the circumference of the suction member.

8. The cutting device according to claim 7, wherein, An end of the second protrusion facing away from the suction member is a pointed end.

9. The cutting device according to any one of claims 1-8, characterized in that The suction member is provided with a first suction channel and a first liquid outlet channel, the suction port is communicated with the distal end of the first suction channel, and the spray port is communicated with the distal end of the first liquid outlet channel.

10. The cutting device according to claim 9, wherein, The recovery component also includes an operating member, the distal end of which is connected to the proximal end of the suction member, and the operating member is provided with a second suction channel and a second liquid outlet channel, the second suction channel is connected to the first suction channel, and the second liquid outlet channel is connected to the first liquid outlet channel.

11. The cutting device according to claim 10, wherein The resection device also includes a handle body, and the catheter is installed in the handle body; the recovery component also includes a conveying mechanism installed on the handle body, the conveying mechanism is connected to the distal end of the operating member, and is used to drive the operating member and the suction member to move along the axial direction of the catheter.

12. The cutting device according to claim 11, wherein The conveying mechanism includes a mounting frame, a conveying knob and a conveying seat, the mounting frame is installed on the handle body, the operating member is passed through the mounting frame and connected to the conveying knob, the conveying knob is connected to the mounting frame, the rotation of the conveying knob drives the operating member to move linearly, the conveying seat is connected to the distal end of the operating member, and is provided with a third suction channel and a third liquid outlet channel, the third suction channel is connected to the second suction channel, and the third liquid outlet channel is connected to the second liquid outlet channel.

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