Endangium stripping device

Abstract

The invention relates to a vascular intima stripping device.The vascular intima stripping device comprises an inner core tube, a middle tube, a stripping component, an outer tube, a first operating handle and a second operating handle, the radial expansion degree of the stripping component can be flexibly adjusted to adapt to the inner diameter of a lesion blood vessel, damage to the blood vessel during stripping operation is greatly reduced, and the stripping efficiency is improved. The inner film can be clamped more easily when the inner film is twisted, and the clamped inner film can be effectively prevented from falling off in the stripping process and the device withdrawing process. The device is simple in structure, convenient to operate and high in controllability, the axial length of the stripping part can be increased, the working area of the stripping part is larger, the device is suitable for stripping some intima which is long and high in stripping difficulty, the operation efficiency is improved, the operation time is shortened, and pain of a patient is relieved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a vascular endothelial stripping device. Background Art

[0002] Endarterectomy refers to a surgery to remove the endothelium with atherosclerotic plaques from the blood vessels. It is mostly used to treat carotid stenosis and reduce stroke. Endarterectomy is a very delicate surgery that requires extremely high technical skills of the surgeon. The operation time should not be too long to avoid serious complications. In addition, the success rate and safety of the operation are also closely related to the hospital's equipment, the doctor's experience and the patient's specific situation. In some cases, an internal stent can also be selected to prop up the blood vessels, but the treatment effect is not as good as endarterectomy, and it is impossible to completely remove and eliminate the endothelium with atherosclerotic plaques. For this reason, the Endarterectomy Device has emerged.

[0003] Endarterectomy devices are used to remove the intima with atherosclerotic plaques from blood vessels. Currently, endarterectomy devices are rarely used in surgery, mainly because the existing endarterectomy devices are inconvenient to operate, and the endarterectomy and clamping effects are not very good. Developing an endarterectomy device that is easy to operate, has a good endarterectomy effect and high efficiency can reduce the difficulty and risk of endarterectomy. Summary of the invention

[0004] The object of the present invention is to provide a vascular intimal stripping device which is easy to operate and has a good intimal stripping effect.

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

[0006] A device for stripping the endothelium of a blood vessel comprises an inner core tube, an intermediate tube, a stripping component, an outer tube, a first operating handle and a second operating handle. The inner core tube is provided with a guide wire cavity extending from one end to the other end thereof for the guide wire to pass through; the intermediate tube is relatively slidably sleeved on the inner core tube; the stripping component is sleeved on the distal end of the inner core tube, the distal end of the stripping component is fixedly connected to the distal end of the inner core tube, the proximal end of the stripping component is fixedly connected to the distal end of the intermediate tube, the stripping component has a radial contraction state and a radial expansion state, and the stripping component can be switched between the radial contraction state and the radial expansion state by adjusting the distance between the distal end of the inner core tube and the distal end of the intermediate tube, and the stripping component comprises a plurality of wire elements arranged along the circumference of the inner core tube, and two adjacent wire elements are arranged at the same time. The opening formed between the elements is opened more when the stripping component is in a radially expanded state than when the stripping component is in a radially contracted state; the outer tube is relatively slidably mounted on the intermediate tube; the first operating handle is arranged between the proximal end of the inner core tube and the proximal end of the intermediate tube, and the first operating handle is provided with a first driving component capable of driving the inner core tube to slide relative to the intermediate tube and a second driving component capable of driving the inner core tube and the intermediate tube to rotate around their own axes, thereby driving the stripping component to rotate around their own axes; the second operating handle is arranged at the proximal end of the outer tube, and is used to drive the outer tube to slide relative to the intermediate tube.

[0007] The present invention can make the inner core tube slide relative to the middle tube through the first driving component, adjust the degree of radial expansion of the stripping component to adapt to the blood vessel where it is located, and make the inner core tube and the middle tube rotate together through the second driving component to drive the stripping component to rotate to twist the inner membrane, and make the inner core tube slide relative to the middle tube through the first driving component and / or make the outer tube slide relative to the middle tube through the second operating handle so that the stripping component attached or wrapped with the inner membrane can radially contract and clamp the inner membrane, and at the same time, part of the inner membrane is clamped between the middle tube and the outer tube, which can effectively prevent the inner membrane from falling off when the device is withdrawn. The device of the present invention has a simple structure, is easy to operate and has strong controllability. The axial length of the stripping component can be increased to make its working area larger, so that it is suitable for stripping some inner membranes that are longer and more difficult to strip, thereby improving the efficiency of the operation, shortening the time of the operation, and reducing the pain of the patient.

[0008] In an embodiment of the present invention, when the stripping member is in the radially expanded state, the stripping member is substantially spindle-shaped.

[0009] According to some specific embodiments of the present invention, the silk thread element includes a first section, a second section and a third section, the distal end of the first section is fixedly connected to the distal end of the inner core tube, the proximal end of the first section is fixedly connected to the distal end of the second section, the proximal end of the second section is fixedly connected to the distal end of the third section, the proximal end of the third section is fixedly connected to the distal end of the intermediate tube, the second section is wavy, and the second section increases the contact area between the stripping component and the inner membrane. Compared with the stripping component composed of completely straight silk threads, the wavy design of the second section greatly improves the clamping effect on the inner membrane, and greatly reduces the risk of inner membrane falling off during the stripping process and device withdrawal.

[0010] Furthermore, when the stripping component is in the radially expanded state, the second section has crests and troughs staggered in sequence in a direction parallel to the axis of the stripping component, the distance between two adjacent crests is equal to the distance between two adjacent troughs, and the distance between adjacent crests and troughs is equal.

[0011] Furthermore, projections of the first section and the third section on the axis of the peeling member coincide with the axis of the peeling member respectively.

[0012] Furthermore, when the stripping component is in the radially expanded state, there is a distance between the second sections of two adjacent thread elements.

[0013] In the embodiment of the present application, the number of the wire elements is 4 to 8.

[0014] According to some specific embodiments, the number of the thread elements is 6, and when the stripping component is in a radially expanded state, two thread elements located on opposite sides of the stripping component are centrally symmetrical to each other.

[0015] More specifically, the projection of the peeling component on the cross section is a circle composed of a plurality of T-shapes, wherein the projections of the first segment and the second segment overlap and are located inside the circle, and the outer circumference of the circle is formed by the projection of the second segment.

[0016] In an embodiment of the present invention, when the exfoliation member changes from a radially contracted state to a radially expanded state, the distal end of the exfoliation member approaches the proximal end of the exfoliation member.

[0017] In an embodiment of the present invention, the axis line of the inner core tube, the axis line of the intermediate tube, the axis line of the stripping component and the axis line of the outer tube coincide with each other, and when the stripping component is in the radially contracted state, the stripping component is completely attached to or close to the inner core tube.

[0018] In an embodiment of the present invention, the maximum outer diameter of the stripping component when in a radially contracted state is 1 mm to 5 mm.

[0019] In the embodiment of the present invention, the maximum outer diameter of the stripping component in the radially expanded state is 2 mm to 20 mm, and the maximum outer diameter of the stripping component in the radially expanded state is greater than the outer diameter of the stripping component in the radially contracted state.

[0020] In an embodiment of the present invention, the axial length of the stripping component when in a radially contracted state is 0.5 cm to 10 cm.

[0021] Furthermore, the length of the second section in the axial direction of the peeling component is 0.5 cm to 5 cm.

[0022] In an embodiment of the present invention, the material of the peeling component is one or more of shape memory metal, shape memory alloy, and high molecular polymer.

[0023] Furthermore, the material of the peeling component is nickel-titanium alloy, copper-based, iron-based or other shape memory metals, stainless steel wire or high molecular polymer.

[0024] In the embodiment of the present invention, the material of the peeling component is opaque and developable, so that the operator can confirm the position of the peeling component and its real-time status at any time.

[0025] In an embodiment of the present invention, a TIP head is provided at the distal end of the inner core tube, and the material of the TIP head is opaque and developable, or a developing coating or developing ring is provided at the distal end of the inner core tube, so that the operator can confirm the position of the distal end of the inner core tube in the blood vessel at any time. Further, the materials of the inner core tube, the intermediate tube and the outer tube are all metal and / or high molecular polymer.

[0026] Still further preferably, the inner core tube, the middle tube and the outer tube are all polymer extruded tubes, such as one or more of FEP extruded tube, Peek extruded tube, PI extruded tube, PTFE extruded tube, Pebax extruded tube, TPU extruded tube, PP extruded tube, PA12 extruded tube or TR55 extruded tube.

[0027] The materials of the inner core tube, the middle tube and the stripping component may be the same or different, and the stripping component and the inner core tube and / or the middle tube may be connected by bonding, welding, integral cutting and forming, etc.

[0028] In some embodiments of the present invention, the inner core tube and the intermediate tube are respectively composed of a hollow nickel-titanium alloy catheter / guidewire, the distal end of the intermediate tube is laser cut to form a wire element of the stripping part, and the distal end of the wire element is welded to the distal end of the inner core tube.

[0029] In some specific embodiments of the present invention, the inner core tube, the middle tube and the outer tube are all polymer extruded tubes, and a plurality of prefabricated memory metal wires are connected between the distal end of the inner core tube and the distal end of the middle tube by bonding to form the stripping component.

[0030] Furthermore, the vascular endothelial stripping device also includes a guide wire for guiding the vascular endothelial stripping device into the blood vessel and delivering the stripping component to the location of the endothelial membrane.

[0031] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0032] The vascular endothelial stripping device of the present invention can flexibly adjust the degree of radial expansion of the stripping component to adapt to the inner diameter of the diseased blood vessel, greatly reduce the damage to the blood vessel during the stripping operation, and can more easily clamp the endothelial membrane when twisting the endothelial membrane, and can effectively prevent the clamped endothelial membrane from falling off during the stripping process and during the withdrawal of the device. The device of the present invention has a simple structure, convenient operation and strong controllability, and can increase the axial length of the stripping component to make its working area larger, so as to be suitable for stripping some endothelial membranes that are longer and more difficult to strip, thereby improving the efficiency of the operation, shortening the operation time, and reducing the pain of the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 It is a schematic structural diagram of the vascular endarterectomy device of Example 1;

[0035] Figure 2 for Figure 1 sectional view of (stripped parts not shown);

[0036] Figure 3 It is a schematic diagram of the three-dimensional structure of the stripping component of the endothelial stripping device of Example 1;

[0037] Figure 4 It is a front view of the stripping component of the endothelial stripping device of Example 1;

[0038] Figure 5 It is a front view of the stripping component of the endothelial stripping device of Example 1 from another viewing angle;

[0039] Figure 6 It is a projection diagram of the stripping component of the endothelial stripping device of Example 1 on a cross section;

[0040] Figure 7 It is a schematic structural diagram of a wire element of a stripping component of the endothelial stripping device of Example 1;

[0041] Figure 8 is a projection diagram of the wire element of the stripping component of the endothelial stripping device of Example 1 on the axis of the stripping component,

[0042] In the above figure: 1. inner core tube; 2. middle tube; 3. stripping component; 31. wire element; 311. first section; 312. second section; 313. third section; 4. outer tube; 51. first operating handle; 511. first driving component; 512. second driving component; 52. second operating handle; 6. guide wire. DETAILED DESCRIPTION

[0043] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0044] In the description of the present invention, it is necessary to understand that the distal end refers to the end of the instrument or component away from the operator (e.g., medical staff), and the proximal end refers to the end of the instrument or component close to the operator (e.g., medical staff); the axial direction refers to the direction parallel to the line connecting the distal and proximal centers of the instrument or component, and the radial direction refers to the direction perpendicular to the axial direction; the inside and the outside are positions defined by the distance relative to the center of the instrument or component, wherein the inside is a position close to the center of the instrument or component, and the outside is a position far from the center of the instrument or component. The description of the above-mentioned directional words is only for the convenience of describing the embodiments of the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0045] In this application, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0046] In this application, unless otherwise clearly specified and limited, in the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "fixed" and the like should be understood in a broad sense, for example, they can be fixedly connected or integrated. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

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

[0048] Example 1

[0049] like Figures 1 to 8 As shown, this embodiment provides a vascular endothelial stripping device, which includes an inner core tube 1, an intermediate tube 2, a stripping component 3, an outer tube 4, a first operating handle 51, a second operating handle 52 and a guide wire 6.

[0050] Specifically, a guidewire cavity extending from one end to the other end thereof for the guidewire 6 to pass through is provided in the inner core tube 1 , and the guidewire 6 can extend from the distal end of the guidewire cavity.

[0051] Specifically, the middle tube 2 is relatively slidably sleeved on the inner core tube 1 , and the distal end of the inner core tube 1 extends out from the distal end of the middle tube 2 .

[0052] Specifically, the stripping component 3 is sleeved on the distal end of the inner core tube 1, the distal end of the stripping component 3 is fixedly connected to the distal end of the inner core tube 1, the proximal end of the stripping component 3 is fixedly connected to the distal end of the intermediate tube 2, and the stripping component 3 has a radial contraction state and a radial expansion state. The stripping component 3 can be switched between the radial contraction state and the radial expansion state by adjusting the distance between the distal end of the inner core tube 1 and the distal end of the intermediate tube 2. In the present embodiment, when the stripping component 3 changes from the radial contraction state to the radial expansion state, the distal end of the stripping component 3 approaches the proximal end of the stripping component 3. The stripping component 3 includes a plurality of wire elements 31 arranged along the circumference of the inner core tube 1, and the opening formed between two adjacent wire elements 31 is larger in opening degree when the stripping component 3 is in the radial expansion state than in opening degree when the stripping component 3 is in the radial contraction state. In the present embodiment, as Figures 3 to 5 As shown in FIG. 1 , when the peeling member 3 is in a radially expanded state, the peeling member 3 is substantially spindle-shaped. Figure 7 and Figure 8As shown, each thread element 31 includes a first section 311, a second section 312 and a third section 313, the distal end of the first section 311 is fixedly connected to the distal end of the inner core tube 1, the proximal end of the first section 311 is fixedly connected to the distal end of the second section 312, the proximal end of the second section 312 is fixedly connected to the distal end of the third section 313, the proximal end of the third section 313 is fixedly connected to the distal end of the intermediate tube 2, and the second section 312 is wavy. When the stripping component 3 is in a radial expansion state, the second section 312 has crests and troughs that are staggered in sequence in a direction parallel to the axis of the stripping component 3, the distance between two adjacent crests is equal to the distance between two adjacent troughs, and the distance between adjacent crests and troughs is equal. The projections of the first section 311 and the third section 313 on the axis of the stripping component 3 coincide with the axis of the stripping component 3 respectively. When the stripping component 3 is in a radial expansion state, there is a distance between the second sections 312 of two adjacent thread elements 31. In this embodiment, the number of the thread elements 31 is 6. When the stripping component 3 is in a radially expanded state, the two thread elements 31 located on opposite sides of the stripping component 3 are centrally symmetrical to each other. Figure 6 As shown, the projection of the stripping component 3 on the cross section is a circle composed of 6 T-shapes, wherein the projections of the first section 311 and the second section 312 overlap and are located inside the circle, and the outer circumference of the circle is formed by the projection of the second section 312. In this embodiment, when the stripping component 3 is in a radially contracted state, the stripping component 3 is completely attached to or close to the inner core tube 1, the maximum outer diameter of the stripping component 3 when in a radially contracted state is 2.5 mm, the maximum outer diameter of the stripping component 3 when in a radially expanded state is 15 mm, and the axial length of the stripping component 3 when in a radially contracted state is 10 cm, wherein the length of the second section 312 in the axial direction of the stripping component 3 is 5 cm. In other embodiments, the stripping component 3 of a suitable size can be selected according to the size and / or length of the endothelium in the blood vessel.

[0053] Specifically, the outer tube 4 is relatively slidably sleeved on the middle tube 2. In this embodiment, the proximal ends of the inner core tube 1 and the middle tube 2 extend from the proximal end of the outer tube 4 respectively, and when the outer tube 4 slides along the middle tube 2 toward the distal end of the inner core tube 1, the radial direction of the stripping component 3 can also be reduced and gradually accommodated in the outer tube 4.

[0054] In the present embodiment, the first operating handle 51 is arranged between the proximal end of the inner core tube 1 and the proximal end of the intermediate tube 2. The first operating handle 51 is provided with a first driving component 511 capable of driving the inner core tube 1 to slide relative to the intermediate tube 2 and a second driving component 512 capable of driving the inner core tube 1 and the intermediate tube 2 to rotate around their own axis, thereby driving the stripping component 3 to rotate around its own axis. In the present embodiment, there is no special restriction on the first driving component 511. A conventional driving component capable of realizing relative sliding of the inner core tube 1 and the intermediate tube 2 in the art can be used, which will not be described in detail here. Similarly, the present embodiment has no special restriction on the second driving part. A conventional driving component capable of realizing simultaneous rotation of the inner core tube 1 and the central tube around the axis in the art can be used, which will not be described in detail here. In the present embodiment, the second operating handle 52 is arranged at the proximal end of the outer tube 4, and is used to drive the outer tube 4 to slide relative to the intermediate tube 2.

[0055] In this embodiment, a TIP head is provided at the distal end of the inner core tube 1 , and the material of the TIP head is a nickel-titanium alloy that is opaque and developable.

[0056] In this embodiment, the inner core tube 1 and the middle tube 2 are respectively composed of hollow nickel-titanium alloy catheters, the distal end of the middle tube 2 is laser cut to form the wire element 31 of the stripping component 3, and the distal end of the wire element 31 is welded to the distal end of the inner core tube 1. The outer tube 4 is a Peek extrusion tube. In other embodiments, the materials of the inner core tube 1, the middle tube 2 and the outer tube 4 can be selected according to actual needs.

[0057] The method of using the endothelial stripping device of this embodiment is as follows:

[0058] (1) Before use, the stripping component 3 is housed in the outer tube 4, the inner core tube 1 is flushed with a syringe and a flushing needle, the desired site is punctured with a puncture sheath, and a guide wire 6 is inserted. The endothelial stripping device enters the blood vessel along the guide wire 6, and the stripping component 3 reaches the lesion site.

[0059] (2) The outer tube 4 is withdrawn to expose the stripping component 3, and the radial expansion degree of the stripping component 3 is adjusted by operating the first driving component 511 to adapt to the blood vessel in which it is located.

[0060] (3) The peeling member 3 is rotated by operating the second driving member 512 to twist and wrap the inner film.

[0061] (4) By operating the second driving component 512 and / or pushing the outer tube 4, the peeling component 3 is radially contracted to clamp the inner membrane.

[0062] (5) The device is withdrawn to completely peel off the endothelium. At the same time, the outer tube 4 can be selectively pushed further to further clamp the endothelium. The device and guide wire 6 are withdrawn until they are out of the body.

[0063] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vascular endothelial stripping device, characterized in that: The vascular endarterial stripping device comprises: An inner core tube (1), wherein the inner core tube (1) is provided with a guide wire cavity extending from one end thereof to the other end thereof for passing a guide wire (6); an intermediate tube (2), wherein the intermediate tube (2) is relatively slidably sleeved on the inner core tube (1); A stripping component (3), wherein the stripping component (3) is sleeved on the distal end of the inner core tube (1), the distal end of the stripping component (3) is fixedly connected to the distal end of the inner core tube (1), and the proximal end of the stripping component (3) is fixedly connected to the distal end of the intermediate tube (2), the stripping component (3) has a radial contraction state and a radial expansion state, and the stripping component (3) can be switched between the radial contraction state and the radial expansion state by adjusting the distance between the distal end of the inner core tube (1) and the distal end of the intermediate tube (2), the stripping component (3) comprises a plurality of thread elements (31) arranged along the circumference of the inner core tube (1), and the opening formed between two adjacent thread elements (31) when the stripping component (3) is in the radial expansion state is greater than the opening when the stripping component (3) is in the radial contraction state; an outer tube (4), wherein the outer tube (4) is relatively slidably sleeved on the intermediate tube (2); a first operating handle (51), the first operating handle (51) being arranged between the proximal end of the inner core tube (1) and the proximal end of the intermediate tube (2), the first operating handle (51) being provided with a first driving component (511) capable of driving the inner core tube (1) to slide relative to the intermediate tube (2), and a second driving component (512) capable of driving the inner core tube (1) and the intermediate tube (2) to rotate around their own axes, thereby driving the stripping component (3) to rotate around its own axis; A second operating handle (52), the second operating handle (52) is arranged at the proximal end of the outer tube (4) and is used to drive the outer tube (4) to slide relative to the middle tube (2).

2. The endothelial stripping device according to claim 1, characterized in that: When the peeling member (3) is in the radially expanded state, the peeling member (3) is substantially spindle-shaped.

3. The endovascular endarterectomy device according to claim 1 or 2, characterized in that: The wire element (31) comprises a first section (311), a second section (312) and a third section (313); the distal end of the first section (311) is fixedly connected to the distal end of the inner core tube (1); the proximal end of the first section (311) is fixedly connected to the distal end of the second section (312); the proximal end of the second section (312) is fixedly connected to the distal end of the third section (313); the proximal end of the third section (313) is fixedly connected to the distal end of the intermediate tube (2); and the second section (312) is wavy.

4. The endovascular endarterectomy device according to claim 3, characterized in that: When the peeling component (3) is in the radial expansion state, the second section (312) has crests and troughs that are staggered in sequence in a direction parallel to the axis of the peeling component (3), the distance between two adjacent crests is equal to the distance between two adjacent troughs, and the distance between adjacent crests and troughs is equal.

5. The endovascular endarterectomy device according to claim 3, characterized in that: The projections of the first section (311) and the third section (313) on the axis of the peeling component (3) respectively coincide with the axis of the peeling component (3).

6. The endovascular endarterectomy device according to claim 3, characterized in that: When the stripping component (3) is in the radially expanded state, there is a distance between the second sections (312) of two adjacent thread elements (31).

7. The vascular endarterectomy device according to claim 1 or 2, characterized in that: The number of the thread elements (31) is 4 to 8.

8. The endovascular endarterectomy device according to claim 7, characterized in that: The number of the thread elements (31) is 6, and when the stripping component (3) is in a radially expanded state, two thread elements (31) located on opposite sides of the axis of the stripping component (3) are centrally symmetrical to each other.

9. The endovascular endarterectomy device according to claim 1, characterized in that: When the peeling component (3) changes from the radially contracted state to the radially expanded state, the distal end of the peeling component (3) approaches the proximal end of the peeling component (3).

10. The vascular endarterectomy device according to claim 1, characterized in that: The axis centerline of the inner core tube (1), the axis centerline of the intermediate tube (2), the axis centerline of the stripping component (3) and the axis centerline of the outer tube (4) coincide with each other, and when the stripping component (3) is in the radially contracted state, the stripping component (3) is completely attached to or close to the inner core tube (1); and / or the maximum outer diameter of the stripping component (3) in the radially contracted state is 1 mm to 5 mm; and / or, the maximum outer diameter of the peeling component (3) when in a radially expanded state is 2 mm to 20 mm, and the maximum outer diameter of the peeling component (3) when in a radially expanded state is greater than the outer diameter of the peeling component (3) when in a radially contracted state; And / or, the axial length of the peeling component (3) when in the radially contracted state is 0.5 cm to 10 cm. And / or, the material of the peeling component (3) is one or more of shape memory metal, shape memory alloy, and high molecular polymer, And / or, the endothelial stripping device further includes a guide wire.

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