A micro lesion positioning device

Abstract

This utility model relates to the field of medical device technology, and in particular to a device for locating small lesions, comprising: a positioning structure, which includes a titanium clip, a sleeve, and a guidewire; the first end of the titanium clip is a clamping end, and the second end of the titanium clip is a traction end; the clamping end extends from the first end of the sleeve; the portion of the titanium clip between the clamping end and the traction end is slidably connected to the sleeve; the traction end is connected to the first end of the guidewire, and the second end of the guidewire extends from the second end of the sleeve; the surface of the sleeve has a luminescent material that can emit light when excited by a light source; and an insertion structure, which includes a catheter, a working handle, and a handle; the first end of the catheter is connected to the second end of the sleeve, and the second end of the catheter is connected to the working handle; the handle is mounted on the working handle and is slidable relative to the working handle; the second end of the guidewire passes through the catheter and is connected to the handle. This utility model is at least beneficial for improving the positioning accuracy of lesions in minimally invasive surgery.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a device for locating tiny lesions. Background Technology

[0002] For surgery on benign and malignant tumors of the gastrointestinal tract, accurate lesion localization is fundamental to successful operation. However, in clinical practice, a significant number of early-stage gastrointestinal cancers, benign tumors (those unresectable endoscopically), and small endoscopic stromal tumors are difficult to locate accurately by sight or touch alone due to their small size. Before the widespread adoption of laparoscopic techniques, one or more titanium clips were often placed endoscopically preoperatively to assist in lesion localization, and the lesion could be accurately located intraoperatively by touching the titanium clips. Currently, laparoscopic minimally invasive surgery is widely used in gastrointestinal surgery, and its efficacy is widely recognized. It is a good indication for early-stage gastrointestinal cancers, benign tumors (those unresectable endoscopically), and small endoscopic stromal tumors. For these types of lesions, the surgeon lacks direct tactile feedback during laparoscopic surgery. Even with preoperative endoscopic placement of titanium clips to assist in lesion localization, it is difficult to determine the lesion's location by simply touching the intestinal segment between instruments, thus limiting the accuracy of lesion localization in laparoscopic minimally invasive surgery. Utility Model Content

[0003] In view of this, the present invention aims to provide a device for locating small lesions, which at least helps to improve the positioning accuracy of lesions in minimally invasive surgery.

[0004] To achieve the above objectives, the technical solution created by this utility model is implemented as follows:

[0005] This invention provides a device for locating small lesions, comprising: a positioning structure, including a titanium clip, a sleeve, and a guidewire; a portion of the titanium clip and a portion of the guidewire are disposed within the inner ring of the sleeve; a first end of the titanium clip is a clamping end, and a second end of the titanium clip is a traction end; the clamping end extends from the first end of the sleeve; a portion of the titanium clip between the clamping end and the traction end is slidably connected to the sleeve; the traction end is connected to the first end of the guidewire, and the second end of the guidewire extends from the second end of the sleeve; the surface of the sleeve has a luminescent material that emits light when excited by a light source; and an insertion structure, including a catheter, a working handle, and a handle; a first end of the catheter is connected to the second end of the sleeve, and the second end of the catheter is connected to the working handle; the handle is disposed on the working handle and is slidable relative to the working handle; the second end of the guidewire passes through the catheter and is connected to the handle; during use, by pulling the guidewire with the handle, the guidewire causes the traction end to slide relative to the sleeve, thereby clamping the titanium clip at the target position; pulling the guidewire away from the titanium clip until the guidewire breaks off, thereby disengaging the positioning structure from the insertion structure; and the positioning structure is then clamped at the target position by the titanium clip.

[0006] Furthermore, luminescent materials can emit infrared light when excited by visible light or ultraviolet light sources.

[0007] Furthermore, the titanium clip includes a first clamping part and a second clamping part. The first end of the first clamping part corresponds to the clamping end, and the second end of the first clamping part corresponds to the traction end. The first end of the second clamping part corresponds to the clamping end, and the second end of the second clamping part corresponds to the traction end. The second ends of the first clamping part and the second ends of the second clamping part are fixed to the guide wire by set screws. The first clamping part has a first slot, and a first fixing screw passes through the first slot, with both ends of the first fixing screw fixed to the sleeve. The second clamping part has a second slot, and a second fixing screw passes through the second slot, with both ends of the second fixing screw fixed to the sleeve.

[0008] Furthermore, the first end of the first clamping part is serrated on the side facing the second clamping part, and the first end of the second clamping part is serrated on the side facing the first clamping part.

[0009] Furthermore, along the direction from the first end of the sleeve to the second end of the sleeve, the sleeve includes a first part, a second part, a third part, and a fourth part connected in sequence, wherein the outer diameters of the first part, the second part, the third part, and the fourth part are all the same; wherein, along the extension direction of the first fixing screw, the first part includes a first fixing part and a second fixing part arranged at intervals and opposite to each other, the traction end of the titanium clip is located between the first fixing part and the second fixing part, the two ends of the first fixing screw are respectively fixed to the first fixing part and the second fixing part, and the two ends of the second fixing screw are respectively fixed to the first fixing part and the second fixing part; the second part, the third part, and the fourth part are all tubular, and the inner diameters of the third part and the fourth part are both smaller than the inner diameter of the second part; along the direction from the first fixing screw to the second fixing screw, the size of the traction end gradually decreases in the direction away from the clamping end, and the part of the traction end away from the clamping end can extend into the inner ring of the second part.

[0010] Furthermore, the inner diameter of the third part is smaller than that of the fourth part; the outer ring of the guidewire has an anti-detachment component. When the guidewire is pulled away from the titanium clip, the anti-detachment component passes through the inner ring of the third part and enters the inner ring of the fourth part. After that, the anti-detachment component unfolds in the inner ring of the fourth part, and the width of the unfolded anti-detachment component is greater than that of the inner diameter of the third part.

[0011] Furthermore, the sleeve also includes a fifth part and a sixth part. The fifth part is located on the side of the fourth part away from the third part, and the sixth part is located on the side of the fifth part away from the fourth part. The outer diameter of the fifth part is equal to the outer diameter of the fourth part, and the outer diameter of the sixth part is smaller than the outer diameter of the fifth part. The sixth part extends into the first end of the catheter, and the inner diameters of both the fifth and sixth parts are smaller than the inner diameter of the fourth part.

[0012] Furthermore, the guide wire has an annular fracture groove located on the portion of the guide wire between the anti-detachment component and the handle. When the guide wire is pulled apart, the annular fracture groove breaks.

[0013] Furthermore, the luminescent material is in powder form, and the surface of the sleeve has a mixture obtained by mixing the luminescent material with silicone.

[0014] Compared with the prior art, the present invention can achieve the following beneficial effects: The micro-lesion positioning device provided by the present invention is used in minimally invasive surgery to locate lesions. Specifically, the positioning structure can be fixed at the location of the lesion or a position adjacent to the lesion by titanium clips. In the positioning structure, the opening and closing of the titanium clips can be controlled by guide wires and handles, that is, the opening and closing of the titanium clips inside the body can be controlled from outside the body. The clamping position of the first clamping part and the second clamping part of the titanium clip is designed with a serrated structure, which can improve the success rate of titanium clip fixation during use and ensure that the titanium clips are not easy to fall off after clamping. In addition, the surface of the sleeve has a luminescent material. After the positioning structure is clamped at the target position by titanium clips, the luminescent material is excited by a light source to emit light. The luminescent material on the surface of the sleeve makes the setting area of ​​the luminescent material in the positioning structure larger and the light intensity generated by the luminescent material stronger, making it easier to locate the positioning structure during surgery, thereby improving the positioning accuracy of the lesion. Attached Figure Description

[0015] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation of this utility model. Unless otherwise stated, the figures in the drawings do not constitute a limitation of scale. The figures described below are merely some embodiments of this application. For those skilled in the art, other figures can be obtained based on these figures without creative effort. In the figures:

[0016] Figure 1 A schematic diagram of the microlesion positioning device described in the embodiments of this utility model;

[0017] Figure 2 A schematic diagram of the handle, conduit, and working handle as described in the embodiments of this utility model;

[0018] Figure 3 A schematic diagram of the handle, catheter, working handle, and part of the guidewire as described in the embodiment of this utility model;

[0019] Figure 4 A schematic diagram of the structure of the titanium clip and part of the guide wire described in the embodiment of this utility model;

[0020] Figure 5A schematic diagram of the positioning structure described in the embodiment of this utility model;

[0021] Figure 6 This is a schematic diagram of the sleeve structure described in an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 1. Titanium clip; 2. Sleeve; 5. Guide wire; 3. Fixing screw; 20. Guide tube; 21. Working handle; 22. Handle; 31. First fixing screw; 32. Second fixing screw; 110. First clamping part; 120. Second clamping part; 4. Set screw; 41. First slot; 42. Second slot; 111. First part; 112. Second part; 113. Third part; 114. Fourth part; 115. Fifth part; 116. Sixth part; 123. Anti-detachment component; 52. Annular fracture groove; 1111. First fixing part; 1112. Second fixing part; 60. Positioning structure; 61. Guide structure. Detailed Implementation

[0023] Analysis revealed that the existing methods for locating lesions using titanium clips mainly include the following two methods: The first method is that the surgeon locates the titanium clip by touch during the operation, thereby determining the location of the lesion; the second method is that when it is difficult to locate the titanium clip by touch, a gastroscopy or colonoscopy is required for auxiliary positioning. The above two methods have the following problems: During laparoscopic surgery, the surgeon lacks direct tactile feedback. Even if titanium clips are inserted endoscopically to assist in lesion localization before surgery, it is difficult to determine the location of the lesion simply by touching the intestinal segment between instruments; Intraoperative endoscopy (insertion of gastroscopes and colonoscopes) prolongs the operation time, increases operating room operating costs, and correspondingly prolongs the patient's anesthesia time; Because the gastroscopes and colonoscopes are always connected to external devices, a large amount of gas is injected into the intestinal lumen during the operation, causing significant intestinal distension, occupying abdominal space, increasing the difficulty of laparoscopic surgery, and even forcing conversion to open surgery; For colonic lesions, the patient is already positioned before intraoperative colonoscopy, and some or even all punctures have been completed. If the localization does not match the preoperative assessment, the patient's position and puncture location must be reselected, adding unnecessary procedures and failing to fully reflect the principle of minimally invasive surgery; Intraoperative endoscopy requires the cooperation of professional endoscopists, nurses, and the disinfection team, consuming human resources; Intraoperative endoscopy requires the operating room to be equipped with a complete set of specialized endoscopic equipment.

[0024] To address the aforementioned issues, this invention provides a device for locating small lesions. Considering the small size of the titanium clips, forming luminescent material solely on the clips may result in a light source that is too small to be easily detected. Furthermore, considering that insufficient contact between the titanium clips and the target location could easily lead to clip detachment, this invention incorporates luminescent material on the surface of the sleeve. This material emits infrared light under ultraviolet or visible light excitation, thus increasing the area of ​​the luminescent material. During surgery, irradiation with a suitable light source allows for convenient and precise positioning of the locating structure, thereby enabling lesion resection. Additionally, a toothed structure and anti-detachment components enhance the stability of the titanium clips in holding the target location, helping to prevent clip detachment.

[0025] To make the purpose, technical solution, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and do not constitute a limitation thereof.

[0026] It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] refer to Figures 1 to 6 This invention provides a device for locating small lesions, comprising: a positioning structure 60, which includes a titanium clip 1, a sleeve 2, and a guide wire 5. A portion of the titanium clip 1 and a portion of the guide wire 5 are disposed within the inner ring of the sleeve 2. The first end of the titanium clip 1 is a clamping end, and the second end of the titanium clip 1 is a traction end. The clamping end extends from the first end of the sleeve 2. The portion of the titanium clip 1 between the clamping end and the traction end is slidably connected to the sleeve 2 by a fixing screw 3. The traction end is connected to the first end of the guide wire 5, and the second end of the guide wire 5 extends from the second end of the sleeve 2. The surface of the sleeve 2 has a luminescent material that emits light when excited by a light source; and an insertion structure 61, which includes a catheter 20 and a working handle 21. The catheter 20 is connected to the second end of the sleeve 2, and the second end of the catheter 20 is connected to the working handle 21. The handle 22 is mounted on the working handle 21 and is slidable relative to the working handle 21. The second end of the guidewire 5 passes through the catheter 20 and is connected to the handle 22. During use, the guidewire 5 is pulled by the handle 22, and the guidewire 5 causes the traction end to slide relative to the sleeve 2 so that the titanium clip 1 is clamped at the target position. The guidewire 5 is pulled in a direction away from the titanium clip 1 until the guidewire 5 is broken, so that the positioning structure 60 is disengaged from the introduction structure 61. The positioning structure 60 is clamped at the target position by the titanium clip 1. The target position is the location of the lesion or the location adjacent to the lesion.

[0031] It should be noted that by pulling the guide wire 5 away from the titanium clip 1 using the handle 22, the titanium clip 1 can be closed; and by pushing the guide wire 5 towards the titanium clip 1 using the handle 22, the titanium clip 1 can be opened.

[0032] In some embodiments, the outer surface of the sleeve 2 is provided with luminescent material, which increases the area of ​​the luminescent material and helps to further reduce the positioning difficulty of the positioning structure 60, making it easier to locate the positioning structure 60 during the operation.

[0033] In some embodiments, the luminescent material is in powder form, and the surface of the sleeve 2 has a mixture of the luminescent material and silicone. In other embodiments, the luminescent material and the sleeve 2 can be bonded together by spraying, gluing, or other fixing methods. This invention does not limit the fixing method of the luminescent material, as long as the surface of the sleeve 2 is covered with luminescent material.

[0034] In some embodiments, the surface of the titanium clip 1 also has a luminescent material.

[0035] In some embodiments, the luminescent material can emit infrared light when excited by a visible light source or an ultraviolet light source.

[0036] It should be noted that when the guide wire 5 is disconnected, the positioning structure 60 remains at the target position. Irradiation with a light source that emits light from the excitation material can accurately and quickly locate the positioning structure 60, thereby achieving the positioning of the lesion. The positioning structure 60 is removed along with the lesion during the surgical resection of the lesion. In addition, the irradiation of the light source can be done by directly irradiating the body, introducing it into the body through an optical fiber, or directly irradiating the body outside the body.

[0037] In some embodiments, the luminescent material is a near-infrared phosphor that has good chemical stability, is non-toxic, has strong excitation light penetration ability, and high luminous efficiency, i.e., a NIR (near-infrared) phosphor. Specific materials may include Ca2LuHf2Al3O4. 12 Cr 3+ Using near-infrared phosphor as the luminescent material, an infrared camera can be used to image the luminescent sleeve 2 located inside the gastrointestinal tract, which is beneficial for accurately locating the positioning structure 60.

[0038] In some embodiments, the fixing screw 3 includes a first fixing screw 31 and a second fixing screw 32, and the titanium clip 1 includes a first clamping part 110 and a second clamping part 120. The first end of the first clamping part 110 corresponds to the clamping end, and the second end of the first clamping part 110 corresponds to the traction end. The first end of the second clamping part 120 corresponds to the clamping end, and the second end of the second clamping part 120 corresponds to the traction end. The second ends of the first clamping part 110 and the second ends of the second clamping part 120 are fixed to the guide wire 5 by a set screw 4. The first clamping part 110 has a first slot 41, the first fixing screw 31 passes through the first slot 41, and both ends of the first fixing screw 31 are fixed to the sleeve 2. The second clamping part 120 has a second slot 42, the second fixing screw 32 passes through the second slot 42, and both ends of the second fixing screw 32 are fixed to the sleeve 2. Thus, when the guide wire 5 moves the traction end, the second clamping part 120 slides relative to the second fixing screw 32. Since the second fixing screw 32 is located in the second slot 42, the second fixing screw 32 causes the second clamping part 120 to slide along a fixed trajectory. Similarly, when the guide wire 5 moves the traction end, the first clamping part 110 slides relative to the first fixing screw 31. Since the first fixing screw 31 is located in the first slot 41, the first fixing screw 31 causes the first clamping part 110 to slide along a fixed trajectory. In this way, the opening and closing of the titanium clamp 1 can be controlled by the guide wire 5.

[0039] It should be noted that both the first slot 41 and the second slot 42 are arc-shaped.

[0040] In some embodiments, the first end of the first clamping portion 110 is serrated on the side facing the second clamping portion 120, and the first end of the second clamping portion 120 is serrated on the side facing the first clamping portion 110. Designing the clamping position of the titanium clip 1 as serrated can increase the success rate of fixing the titanium clip 1 to the target position during use, and ensure that the titanium clip 1 is not easy to fall off after clamping.

[0041] In some embodiments, along the direction from the first end to the second end of the sleeve 2, the sleeve 2 includes a first portion 111, a second portion 112, a third portion 113, and a fourth portion 114 connected in sequence, wherein the outer diameters of the first portion 111, the second portion 112, the third portion 113, and the fourth portion 114 are all the same. This helps to ensure that the side surface of the sleeve 2 is relatively smooth, preventing the sleeve 2 from scraping against internal tissues when inserted into the body.

[0042] In some embodiments, along the extending direction of the first fixing screw 31, the first portion 111 includes a first fixing portion 1111 and a second fixing portion 1112 arranged at intervals and disposed opposite to each other. The traction end of the titanium clip 1 is located between the first fixing portion 1111 and the second fixing portion 1112. The two ends of the first fixing screw 31 are respectively fixed to the first fixing portion 1111 and the second fixing portion 1112, and the two ends of the second fixing screw 32 are respectively fixed to the first fixing portion 1111 and the second fixing portion 1112. When the titanium clip 1 is unfolded, the first clamp... The holding part 110 and the second clamping part 120 extend outward from the space between the first fixing part 1111 and the second fixing part 1112; the second part 112, the third part 113 and the fourth part 114 are all tubular, and the inner diameter of the third part 113 and the inner diameter of the fourth part 114 are smaller than the inner diameter of the second part 112. Along the direction from the first fixing screw 31 to the second fixing screw 32, the size of the traction end gradually decreases in the direction away from the clamping end, and the part of the traction end away from the clamping end can extend into the inner ring of the second part 112.

[0043] In some embodiments, the inner diameter of the third portion 113 is smaller than the inner diameter of the fourth portion 114; the outer ring of the guidewire 5 has an anti-dislodgement element 123. When the guidewire 5 is pulled away from the titanium clip 1, the anti-dislodgement element 123 passes through the inner ring of the third portion 113 and enters the inner ring of the fourth portion 114. After that, the anti-dislodgement element 123 unfolds in the inner ring of the fourth portion 114, and the width of the unfolded anti-dislodgement element 123 is greater than the inner diameter of the third portion 113. In this way, the fourth portion 114 and the anti-dislodgement element 123 cooperate to limit the guidewire 5 to the position where the titanium clip 1 is closed, preventing the titanium clip 1 from falling off from the target position after the guidewire 5 is disconnected.

[0044] In some embodiments, the sleeve 2 further includes a fifth portion 115 and a sixth portion 116. The fifth portion 115 is located on the side of the fourth portion 114 away from the third portion 113, and the sixth portion 116 is located on the side of the fifth portion 115 away from the fourth portion 114. The outer diameter of the fifth portion 115 is equal to the outer diameter of the fourth portion 114, and the outer diameter of the sixth portion 116 is smaller than the outer diameter of the fifth portion 115. The sixth portion 116 extends into the first end of the conduit 20, and the inner diameters of both the fifth portion 115 and the sixth portion 116 are smaller than the inner diameter of the fourth portion 114.

[0045] In some embodiments, the inner diameter of the fifth portion 115 and the inner diameter of the sixth portion 116 are equal.

[0046] In some embodiments, the guide wire 5 has an annular fracture groove 52, which is located on a portion of the guide wire 5 between the anti-detachment member 123 and the handle 22. When the guide wire 5 is pulled off, the annular fracture groove 52 breaks.

[0047] The microlesion positioning device provided by this utility model is used in minimally invasive surgery. Therefore, in some embodiments, the outer diameter of the sleeve 2 is in the range of 2mm to 2.3mm, and the outer diameter of the working handle 21 is in the range of 10mm to 12mm. This helps to ensure that the size of the end that enters the human body is relatively small.

[0048] In addition, it should be noted that the actual length of the catheter 20 in this utility model can be in the range of 1900mm to 2100mm.

[0049] In some embodiments, the working principle of the micro-lesion positioning device provided by this utility model is as follows: the positioning structure 60 is transported to the target position through the catheter 20 via the dedicated channel of the gastrointestinal endoscope. The handle 22 is pulled to move the guide wire 5, thereby controlling the opening and closing of the titanium clip 1 to complete the clamping task. When the guide wire 5 is broken, the positioning structure 60 stays at the target position. During the operation, the positioning structure 60 is positioned by irradiating it with a light source that can excite the luminescent material to emit light. This can reduce the operation time and the required equipment, reduce the operation cost, and increase the operation efficiency.

[0050] In some embodiments, the assembly method of the micro lesion positioning device provided by this utility model is as follows: First, the titanium clip 1 is connected to the guide wire 5 using the fixing screw 3; second, the guide wire 5 is passed through the catheter 20 and connected to the handle 22, and the handle 22 is installed on the working handle 21, which is fixed to the catheter 20 by a threaded structure; finally, the set screw 4 is passed through the slot on the titanium clip 1 and fixed on the sleeve 2 to complete the overall assembly; after assembly, a luminescent material is formed on the sleeve 2.

[0051] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this utility model can be achieved, and this is not limited herein.

[0052] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A microlesion positioning device, characterized by, include: A positioning structure includes a titanium clip, a sleeve, and a guide wire. A portion of the titanium clip and a portion of the guide wire are disposed within the inner ring of the sleeve. A first end of the titanium clip is a clamping end, and a second end of the titanium clip is a traction end. The clamping end extends from the first end of the sleeve. A portion of the titanium clip between the clamping end and the traction end is slidably connected to the sleeve. The traction end is connected to the first end of the guide wire, and the second end of the guide wire extends from the second end of the sleeve. The surface of the sleeve has a luminescent material that emits light when excited by a light source. An inlet structure is provided, comprising a catheter, a working handle, and a handle. The first end of the catheter is connected to the second end of the sleeve, the second end of the catheter is connected to the working handle, the handle is disposed on the working handle and is slidable relative to the working handle, and the second end of the guidewire passes through the catheter and is connected to the handle. During use, the guide wire is pulled by the handle, causing the guide wire to slide relative to the sleeve, so that the titanium clip is clamped at the target position. The guide wire is pulled away from the titanium clip until it breaks, so that the positioning structure is disengaged from the inlet structure. The positioning structure is clamped at the target position by the titanium clip.

2. The micro lesion positioning device of claim 1, wherein, The luminescent material can emit infrared light when excited by a visible light source or an ultraviolet light source.

3. The micro lesion positioning device of claim 1, wherein, The titanium clip includes a first clamping part and a second clamping part. The first end of the first clamping part corresponds to the clamping end, and the second end of the first clamping part corresponds to the traction end. The first end of the second clamping part corresponds to the clamping end, and the second end of the second clamping part corresponds to the traction end. The second ends of the first clamping part and the second ends of the second clamping part are fixed to the guide wire by set screws. The first clamping part has a first slot, a first fixing screw passes through the first slot, and both ends of the first fixing screw are fixed on the sleeve; The second clamping part has a second slot, a second fixing screw passes through the second slot, and both ends of the second fixing screw are fixed on the sleeve.

4. The micro lesion positioning device of claim 3, wherein, The first end of the first clamping part is serrated on the side facing the second clamping part, and the first end of the second clamping part is serrated on the side facing the first clamping part.

5. The micro lesion positioning device of claim 3, wherein, Along the direction from the first end of the sleeve to the second end of the sleeve, the sleeve includes a first part, a second part, a third part, and a fourth part connected in sequence, wherein the outer diameters of the first part, the second part, the third part, and the fourth part are all the same; Wherein, along the extension direction of the first fixing screw, the first part includes a first fixing part and a second fixing part arranged at intervals and opposite to each other, the traction end of the titanium clip is located between the first fixing part and the second fixing part, the two ends of the first fixing screw are respectively fixed on the first fixing part and the second fixing part, and the two ends of the second fixing screw are respectively fixed on the first fixing part and the second fixing part. The second part, the third part, and the fourth part are all tubular, and the inner diameter of the third part and the inner diameter of the fourth part are both smaller than the inner diameter of the second part. Along the direction from the first fixing screw to the second fixing screw, the size of the traction end gradually decreases in the direction away from the clamping end, and the portion of the traction end away from the clamping end can extend into the inner ring of the second part.

6. The micro lesion positioning device of claim 5, wherein, The inner diameter of the third part is smaller than the inner diameter of the fourth part; The outer ring of the guidewire has an anti-detachment component. When the guidewire is pulled away from the titanium clip, the anti-detachment component passes through the inner ring of the third part and enters the inner ring of the fourth part. The anti-detachment component then unfolds in the inner ring of the fourth part, and the width of the unfolded anti-detachment component is greater than the inner diameter of the third part.

7. The micro lesion positioning device of claim 5, wherein, The sleeve further includes a fifth part and a sixth part. The fifth part is located on the side of the fourth part away from the third part, and the sixth part is located on the side of the fifth part away from the fourth part. The outer diameter of the fifth part is equal to the outer diameter of the fourth part, and the outer diameter of the sixth part is smaller than the outer diameter of the fifth part. The sixth part extends into the first end of the conduit, and the inner diameters of both the fifth and sixth parts are smaller than the inner diameter of the fourth part.

8. The micro lesion positioning device of claim 6, wherein, The guide wire has an annular fracture groove located on the portion of the guide wire between the anti-detachment component and the handle. When the guide wire is pulled apart, the annular fracture groove breaks.

9. The micro lesion positioning device of claim 1, wherein, The luminescent material is in powder form, and the surface of the sleeve has a mixture of the luminescent material and silicone.

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