Vascular plaque rotary cutting system
By incorporating movable protective and limiting components on the rotary cutting guidewire, the problem of complex rotary cutting position adjustment in existing vascular rotary cutting systems is solved, thereby expanding the cutting area, simplifying operation, and improving treatment outcomes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU TIANHONGSHENGJIE MEDICAL INSTR CO LTD
- Filing Date
- 2025-04-22
- Publication Date
- 2026-05-05
AI Technical Summary
In existing vascular excision systems, the filter is axially fixed on the excision guidewire, which makes the excision position adjustment complicated and inconvenient to operate. In addition, the existing collection method has high equipment requirements and is troublesome to operate.
A vascular plaque excision system is designed, in which a movable protective component and a limiting component are provided on the excision guidewire. The protective component can move along the axial direction of the guidewire body, and the limiting component restricts its displacement, simplifying the adjustment of the excision position and expanding the excision area.
It enables efficient axial movement and circumferential rotation of the rotary cutting guidewire at different lesion sites, simplifies the operation process, expands the cutting area, and improves the treatment effect.
Smart Images
Figure CN224193547U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical devices, specifically to a vascular plaque excision system. Background Technology
[0002] The atherectomy system is a minimally invasive interventional technique used to treat atherosclerotic vascular disease. It primarily removes obstructive plaques (such as calcified or fibrotic plaques) within blood vessels to restore blood flow. By mechanically removing or grinding away plaques, it improves vascular patency and serves as a complement or alternative to traditional percutaneous transluminal angioplasty (PTA) and stent implantation.
[0003] The vascular thrombectomy system uses a handle to control the rotation of a guidewire with a thrombectomy component. This high-speed rotation breaks up thrombi and plaque within the blood vessel, removing all fragments before the system is withdrawn from the body. However, during the thrombectomy process, the broken plaque needs to be collected. Existing collection methods mainly include aspiration sheaths and filters. Aspiration sheaths require synchronized operation with the thrombectomy guidewire and also require a transfer aspiration component, making the equipment demanding and operation cumbersome. Filters, which can be mounted on the thrombectomy guidewire for direct collection, are the most commonly used method. However, existing filter collection methods have the following problems: the filter is axially fixed to the thrombectomy guidewire, and after unfolding within the blood vessel, it is supported on the vessel, limiting the thrombectomy guidewire to specific areas. If the thrombectomy position needs to be adjusted, the filter must first be retracted, moved to the area to be cut with the catheter, and then unfolded again for thrombectomy, making the operation complex. Summary of the Invention
[0004] The purpose of this invention is to provide a vascular plaque excision system.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A vascular plaque excision system includes an excision guidewire. The excision guidewire includes a guidewire body rotatable about its own axis, an excision component for removing plaque, and a protective component for collecting the excised plaque. The excision component and the protective component are disposed on the guidewire body, with the protective component located at the distal end of the excision component. The protective component is movable along the axial direction of the guidewire body. The excision guidewire also includes a limiting component for restricting the displacement of the protective component. The limiting component includes a distal limiting component and a proximal limiting component, which are fixedly disposed on the guidewire body. The proximal limiting component is the excision component.
[0007] Preferably, the protective component has a distal end, a proximal end, and a protective body located between the distal end and the proximal end. The distal end and the proximal end are movably sleeved on the guidewire body. The distal end limiting component and the proximal end limiting component are used to limit the displacement of the proximal end on the guidewire body, that is, the proximal end is limited between the distal end limiting component and the proximal end limiting component.
[0008] More preferably, the minimum inner diameter of the distal end is greater than the maximum outer diameter of the distal limiting component; the maximum inner diameter of the proximal end is less than the minimum outer diameters of the distal limiting component and the proximal limiting component, thereby allowing the distal end to pass through the distal limiting component, while the proximal end is restricted between the distal limiting component and the proximal limiting component.
[0009] Preferably, the protective component of the above technical solution is a filter screen, the distal end of the filter screen is gathered on the guide wire body to form a distal end, and the proximal end of the filter screen is gathered on the guide wire body to form a proximal end. The filter screen can be folded around the outer periphery of the guide wire body or unfolded, and when unfolded, the opening of the filter screen faces the proximal end of the guide wire body.
[0010] Preferably, in the above technical solution, the distance from the proximal end of the distal limiting component to the distal end of the rotary cutting component is 35-130mm.
[0011] Preferably, in the above technical solution, the length of the distal limiting component is 2-10mm.
[0012] Preferably, in the above technical solution, the total length of the rotary cutting component is 1-10mm.
[0013] Preferably, in the above technical solution, the length of the protective component is 15-30mm.
[0014] Preferably, in the above technical solution, the rotary cutting component is a ring body, which is fixedly sleeved on the guide wire body. The axis of the ring body coincides with or deviates from the axis of the guide wire body, i.e., a concentric ring body or an eccentric ring body. The eccentric ring body has a greater centrifugal force during rotation than the concentric ring body, resulting in a better rotary cutting effect; and / or
[0015] The rotary cutting component is a protrusion. One end of the protrusion is fixedly connected to the guide wire body and protrudes radially from the guide wire body. Compared with the ring body, the protrusion has a greater centrifugal force when rotating, and the rotary cutting effect is also better.
[0016] Preferably, the guidewire body is provided with a PTFE coating. The PTFE coating is applied to the guidewire body between the proximal end of the guidewire body and the proximal end of the rotary cutting component. The PTFE coating can reduce the friction of the guidewire body during rotation.
[0017] Preferably, the guidewire body is provided with an axial marking coating, and multiple axial marking coatings are applied. The multiple axial marking coatings are applied at intervals on the guidewire body between the proximal end of the guidewire body and the proximal end of the rotary cutting component. The axial movement distance of the guidewire body can be known through the axial marking coatings.
[0018] Preferably, the guidewire body is provided with a radial marking coating. The radial marking coating is applied to the proximal end of the guidewire body and extends radially spirally for a certain distance. The rotation angle of the guidewire body can be known through the radial marking coating.
[0019] Preferably, in the above technical solution, the rotary cutting system further includes an operating handle, the distal end of which is detachably connected to the proximal end of the guide wire body, and the operating handle is configured to drive the rotation, speed, and start / stop of the guide wire body.
[0020] Preferably, in the above technical solution, the rotary cutting system further includes a catheter, which includes a delivery section, a connecting section, and a retraction section. The proximal end of the delivery section and the distal end of the retraction section are connected through the connecting section. The distal end of the delivery section and the proximal end of the retraction section are flexible ends. The delivery section has a guide wire outlet and a rotary cutting guide wire outlet. The retraction section has a rotary cutting guide wire outlet.
[0021] Preferably, the far end of the conveying section and the near end of the retraction section are provided with developing components; and / or the near end and far end of the protective component are provided with developing components.
[0022] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:
[0023] This invention movably mounts the protective component on the guidewire body, allowing the guidewire body to simultaneously drive the rotary cutting component to move axially and rotate circumferentially, enabling the grinding of different lesion sites. The axial movement distance is longer, the cutting area is wider, and the treatment effect is better. At the same time, the rotary cutting component itself limits the protective component, making the structure of the rotary cutting guidewire more simplified. Attached Figure Description
[0024] Appendix Figure 1 This is a schematic diagram of the rotary cutting guide wire in this utility model;
[0025] Appendix Figure 2a This is a schematic diagram of the structure of the rotary cutting component in this utility model, which is a concentric ring.
[0026] Appendix Figure 2b This is a schematic diagram of the eccentric ring structure of the rotary cutting component in this utility model;
[0027] Appendix Figure 2c This is a schematic diagram of the structure of the rotary cutting component as a protrusion in this utility model;
[0028] Appendix Figure 3a This is a schematic diagram of the filter screen in the folded state in this utility model;
[0029] Appendix Figure 3b This is a schematic diagram of the filter screen in the unfolded state in this utility model;
[0030] Appendix Figure 4a This is a schematic diagram showing that the distal end of the filter screen in this utility model does not pass through the distal limiting component;
[0031] Appendix Figure 4b This is a schematic diagram of the filter screen at its distal end via a distal limiting component in this utility model;
[0032] Appendix Figure 5 This is a schematic diagram of the structure of the operating handle in this utility model;
[0033] Appendix Figure 6 This is a schematic diagram of the structure of the conduit in this utility model;
[0034] Appendix Figure 7 This is a schematic diagram of the rotary cutting guidewire of this utility model in a blood vessel.
[0035] In the attached diagrams above:
[0036] 1. Rotary cutting guide wire; 10. Guide wire body; 11. Rotary cutting component; 110. Concentric ring body; 111. Eccentric ring body; 112. Protrusion; 12. Filter screen; 120. Distal end; 121. Proximal end; 13. Distal limiting component;
[0037] 2. Operating handle; 20. Torque controller; 21. Switch; 22. Gear position;
[0038] 3. Catheter; 30. Delivery section; 301. Guide wire outlet; 302. Rotary guide wire outlet; 31. Retraction section; 310. Rotary guide wire outlet; 32. Connecting section;
[0039] 40. Blood vessels; 41. Plaque. Detailed Implementation
[0040] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0041] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0042] A vascular plaque excision system includes an excision guidewire 1, an operating handle 2, and a catheter 3. Specifically:
[0043] like Figure 1 As shown: The rotary cutting guidewire 1 includes a guidewire body 10 that can rotate around its own axis, a rotary cutting component 11 for removing plaques, a protective component for collecting the rotary-cut plaques, and a limiting component for restricting the displacement of the protective component. The rotary cutting component 11, the protective component, and the limiting component are all disposed on the guidewire body 10.
[0044] The guide wire body 10 is the supporting body of the rotary cutting guide wire 1, and its proximal end is connected to the handle 2. In this embodiment, the guide wire body 10 is provided with a coating, which includes one or more of the following:
[0045] PTFE coating: A PTFE coating is applied to the guidewire body 10 between the proximal end of the guidewire body 10 and the proximal end of the rotary cutting component 11. The PTFE coating can reduce the friction of the guidewire body 10 during rotation.
[0046] Axial marking coating: Multiple axial marking coatings are applied to the guidewire body 10 between the proximal end of the guidewire body 10 and the proximal end of the rotary cutting component 11. The axial movement distance of the guidewire body 10 can be known through the axial marking coatings.
[0047] Radial marking coating: A radial marking coating is applied to the proximal end of the guidewire body 10 and extends radially in a spiral for a certain distance. The rotation angle of the guidewire body 10 can be understood through the radial marking coating, especially the rotation angle when the guidewire body 10 is manually rotated.
[0048] The rotary cutting component 11 can be a ring or a protrusion 112. For a rotary cutting component 11 using a ring: the ring is fixedly sleeved on the guide wire body 10, and the axis of the ring coincides with or deviates from the axis of the guide wire body 10, i.e., a concentric ring 110, such as... Figure 2a As shown, the eccentric ring 111, as Figure 2b As shown, the eccentric ring 111 has a greater centrifugal force and a better cutting effect when rotating compared to the concentric ring 110. For the cutting component 11 using the protrusion 112: one end of the protrusion 112 is fixedly connected to the guide wire body 10 and protrudes radially from the guide wire body 10. Compared to the ring, the protrusion 112 has a greater centrifugal force and a better cutting effect when rotating.
[0049] The total length of the rotary cutting component 11 is 1-10mm, and it can be one or more of the following combinations: concentric ring 110, eccentric ring 111, and protrusion 112.
[0050] The protective component is located at the distal end of the rotary cutting component 11 and is movable along the axial direction of the guide wire body 10. The protective component has a distal end 120, a proximal end 121, and a protective body located between the distal end 120 and the proximal end 121. The distal end 120 and the proximal end 121 are movably sleeved on the guide wire body 10.
[0051] In this embodiment: the protective component is a filter screen 12. The distal end of the filter screen 12 is gathered on the guide wire body 10 to form a distal end 121, and the proximal end of the filter screen 12 is gathered on the guide wire body 10 to form a proximal end 121. The filter screen 12 can be folded around the outer periphery of the guide wire body 10 or unfolded, and when unfolded, the opening of the filter screen 12 faces the proximal end of the guide wire body 10.
[0052] The filter screen 12 (protective component) is 15-30mm long and can be made of nickel-titanium wire with a diameter of 0.03-0.05mm.
[0053] In addition, developing components, such as developing rings and developing coatings, are provided on the distal end 120 and proximal end 121 of the filter screen 12.
[0054] The limiting components include a distal limiting component 13 and a proximal limiting component. The distal limiting component 13 and the proximal limiting component are fixedly mounted on the guide wire body 10, and the proximal limiting component is a rotary cutting component 11. In this embodiment, the proximal limiting is achieved by using the rotary cutting component 11 located at the proximal end of the protective component, which can save one proximal limiting component and simplify the structure of the rotary cutting guide wire 1.
[0055] In this embodiment: the distal limiting component 13 and the proximal limiting component (rotary cutting component 11) are specifically used to limit the displacement of the proximal end 121 of the filter screen 12 on the guide wire body 10, that is, the proximal end 121 is limited between the distal limiting component 13 and the proximal limiting component (rotary cutting component 11), such as Figure 4a , 4b As shown. Specifically: the minimum inner diameter of the distal end 120 of the filter 12 is greater than the maximum outer diameter of the distal limiting member 13; the maximum inner diameter of the proximal end 121 of the filter 12 is less than the minimum outer diameter of the distal limiting member 13 and the proximal limiting member (rotary cutting member 11), thereby allowing the distal end 120 to pass through the distal limiting member 13, while the proximal end 121 is restricted between the distal limiting member 13 and the proximal limiting member (rotary cutting member 11).
[0056] Since the filter 12 is movably mounted on the guidewire body 10, when releasing the filter 12, the guidewire body 10 is moved, and the proximal end 121 of the filter 12 abuts against the cutting member 11. Continuing to move the guidewire body 10 moves the filter 12 together until it is released. When retracting the filter 12, the proximal end 121 of the filter 12 abuts against the distal limiting member 13. Continuing to move the guidewire body 10 moves the filter 12 together until it is retracted into the catheter 3.
[0057] The length of the distal limiting component 13 is 2-10mm, the length of the proximal limiting component, i.e. the rotary cutting component 11, is 1-10mm, and the distance from the proximal end of the distal limiting component 13 to the distal end of the rotary cutting component 11 is 35-130mm.
[0058] like Figure 5 As shown: the distal end of the operating handle 2 is detachably connected to the proximal end of the guide wire body 10, for example, via a torque controller 20; the operating handle 2 is configured to drive the rotation, speed, and start / stop of the guide wire body 10, for example, by equipping the operating handle 2 with a drive motor, equipping the operating handle 2 with a switch 21 for controlling the operation of the drive motor, and equipping the operating handle 2 with a speed setting 22 for controlling the speed of the drive motor. The operating handle 2 does not relate to the inventive point of this application and will not be described in detail here.
[0059] like Figure 6 As shown: The catheter 3 includes a delivery section 30, a retraction section 31, and a connecting section 32. The proximal end of the delivery section 30 and the distal end of the retraction section 31 are connected by the connecting section 32.
[0060] The following is a specific implementation of catheter 3:
[0061] The transport section 30 has a length of 30-80cm and a diameter of 0.8-1.6mm. The transport section 30 can consist of two or more sections of different materials and colors, and includes a transparent section with a length of 5-20cm. The illustration shows three sections, with the middle section being transparent. This transparent section serves as a marker for retracting the filter 12, allowing direct observation of whether the filter 12 is in place. The transport section 30 has a guide wire outlet 301 and a rotary cutting guide wire outlet 302, with the rotary cutting guide wire outlet 302 located at the proximal end of the transport section 30. The distal end of the transport section 30 is a flexible end to avoid puncturing tissue. A developing component is also located at the distal end of the transport section 30, and the developing component is made of platinum-iridium alloy, platinum-nickel alloy, or platinum-tungsten alloy.
[0062] The length of the retraction section 31 is 10-80 cm; the diameter of the retraction section 31 is 1.0-1.8 mm. The retraction section 31 can also be divided into two or more sections. A rotary cutting guide wire outlet 310 is provided on the retraction section 31, located at the distal end of the retraction section 31. In addition, similarly, the proximal end of the retraction section 31 is also a flexible end to avoid puncturing the tissue, and a imaging component is also provided at the proximal end of the retraction section 31. The material of the imaging component is also selected from platinum-iridium alloy, platinum-nickel alloy, and platinum-tungsten alloy.
[0063] The innermost layer of the conveying section 30 and the retraction section 31 is made of PTFE, and is covered with an outer layer material, such as a braided layer made of stainless steel wire, polymer wire, nickel-titanium wire, and / or a covering layer made of polyethylene (PE), polypropylene (PP), Pebax, or nylon; the innermost layer of the connecting section 32 is made of stainless steel lining wire, and is covered with an outer layer material, such as a braided layer made of stainless steel wire, polymer wire, nickel-titanium wire, and / or a covering layer made of polymer material.
[0064] The following is a detailed description of how to use this embodiment:
[0065] ①Preparation:
[0066] The filter 12 and the conveying section 30 of the duct 2 are flushed to purge the air from the conveying section 30.
[0067] ②Sheathing:
[0068] The rotary cutting guide wire 1 is inserted into the delivery section 30 of the catheter 3, and the delivery section 30 is pushed so that the rinsed filter screen 12 is retracted into the transparent section of the delivery section 30 so that the front end of the delivery section 30 can pass through the guide wire.
[0069] ③ Guide wire placement:
[0070] The guidewire is inserted from the distal end of the delivery segment 30 and passed through the delivery segment 30, and then inserted into the blood vessel and through the stenotic lesion.
[0071] ④ Filter placement:
[0072] Push the delivery section 30 4-5 cm beyond the lesion site and withdraw the guide wire to separate the guide wire from the delivery section 30. Push the filter 12 to the imaging component at the head end of the delivery section 30 so that the imaging component at the distal end 120 of the filter 12 overlaps with the imaging component at the distal end of the delivery section 30. Withdraw the delivery section 30 to open the filter 12. Continue to withdraw the delivery section 30 to separate the delivery section 30 from the rotary cutting guide wire 1.
[0073] ④ Rotary excision therapy:
[0074] Connect the proximal end of the guidewire body 10 to the distal end of the operating handle 2, and start the switch 21 to drive the guidewire body 10 to rotate. The rotation of the guidewire body 10 drives the rotary cutting component 11 to grind the plaque area. By axially pulling the guidewire body 10, the rotary cutting component 11 performs different grinding and pulsed rotary cutting on the lesion site to treat calcification morphology. Since the distal end 120 of the filter 12 can pass through the distal limiting component 13, the axial movement range of the guidewire body 10 is the length from the distal limiting component 13 to the rotary cutting component 11.
[0075] ⑤ Postoperative retraction:
[0076] After treatment, the rotary cutting guidewire 1 is inserted into the proximal port of the retraction section 31 and passes through the retraction section 31. The retraction section 31 is pushed so that the imaging component at its proximal end overlaps with the imaging component at the proximal end 121 of the filter 12. The retraction section 31 is continued to be pushed until the opening of the filter 12 is closed or it is completely inserted into the retraction section 31. The rotary cutting guidewire 1 and the retraction section 31 are fixed with a guidewire torsion controller and retracted together until they are withdrawn from the body.
[0077] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.
Claims
1. A vascular plaque excision system, comprising an excision guidewire, the excision guidewire including a guidewire body rotatable about its own axis, an excision component for excising plaque, and a protective component for collecting the excised plaque, wherein the excision component and the protective component are disposed on the guidewire body, and the protective component is located at the distal end of the excision component, characterized in that: The protective component can move along the axial direction of the guide wire body. The rotary cutting guide wire also includes a limiting component for limiting the displacement of the protective component. The limiting component includes a distal limiting component and a proximal limiting component. The distal limiting component and the proximal limiting component are fixedly disposed on the guide wire body. The proximal limiting component is the rotary cutting component.
2. The vascular plaque excision system according to claim 1, characterized in that: The protective component has a distal end, a proximal end, and a protective body located between the distal end and the proximal end. The distal end and the proximal end are movably sleeved on the guidewire body. The distal end limiting component and the proximal end limiting component are used to limit the displacement of the proximal end on the guidewire body.
3. The vascular plaque excision system according to claim 2, characterized in that: The minimum inner diameter of the distal end is greater than the maximum outer diameter of the distal limiting component; the maximum inner diameter of the proximal end is less than the minimum outer diameter of both the distal and proximal limiting components.
4. The vascular plaque excision system according to claim 1 or 2, characterized in that: The protective component is a filter screen. The distal end of the filter screen is gathered on the guide wire body to form a distal end, and the proximal end of the filter screen is gathered on the guide wire body to form a proximal end. The filter screen can be folded around the outer periphery of the guide wire body or unfolded, and when unfolded, the opening of the filter screen faces the proximal end of the guide wire body.
5. The vascular plaque excision system according to claim 1, characterized in that: The distance from the proximal end of the distal limiting component to the distal end of the rotary cutting component is 35-130mm; The length of the distal limiting component is 2-10mm; The total length of the rotary cutting component is 1-10mm; The length of the protective component is 15-30mm.
6. The vascular plaque excision system according to claim 1, characterized in that: The rotary cutting component is a ring, which is fixedly sleeved on the guide wire body. The axis of the ring coincides with or deviates from the axis of the guide wire body; and / or The rotary cutting component is a protrusion, one end of which is fixedly connected to the guide wire body and protrudes radially from the guide wire body.
7. The vascular plaque excision system according to claim 1, characterized in that: The guidewire body is provided with a coating, which includes one or more of the following: PTFE coating: The PTFE coating is applied to the guidewire body between the proximal end of the guidewire body and the proximal end of the rotary cutting component; Axial marking coating: Multiple axial marking coatings are applied, with the multiple axial marking coatings spaced apart on the guidewire body between the proximal end of the guidewire body and the proximal end of the rotary cutting component; Radial marking coating: The radial marking coating is applied to the proximal end of the guidewire body and extends radially spirally for a distance.
8. The vascular plaque excision system according to claim 1, characterized in that: The rotary cutting system also includes an operating handle, the distal end of which is detachably connected to the proximal end of the guide wire body. The operating handle is configured to drive the rotation, speed, and start / stop of the guide wire body.
9. The vascular plaque excision system according to claim 1, characterized in that: The rotary cutting system also includes a catheter, which includes a delivery section, a connecting section, and a retraction section. The proximal end of the delivery section and the distal end of the retraction section are connected through the connecting section. The distal end of the delivery section and the proximal end of the retraction section are flexible ends. The delivery section has a guide wire outlet and a rotary cutting guide wire outlet. The retraction section has a rotary cutting guide wire outlet.
10. The vascular plaque excision system according to claim 9, characterized in that: The distal end of the transport section and the proximal end of the retraction section are provided with developing components; and / or The protective component is provided with developing components at its proximal and distal ends.