A tiny lesion visible umbrella-shaped positioning device

Abstract

The present invention relates to the technical field of medical devices, and particularly to a tiny lesion visible umbrella-shaped positioning device, comprising: a positioning structure, which includes: a titanium clip, a sleeve, a guide wire, and an umbrella-shaped component. 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 out from the first end of the sleeve, the traction end is connected to the first end of the guide wire, and the second end of the guide wire extends out from the second end of the sleeve. The umbrella-shaped component includes an umbrella surface and a plurality of umbrella ribs arranged on the outer ring of the sleeve. The plurality of umbrella ribs support the umbrella surface, and the surface of the umbrella surface has a luminescent material, which can emit light under the excitation of a light source; an introduction structure, which includes a catheter, a handle, and a handle grip. 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 handle, the handle grip is arranged on the handle, and the second end of the guide wire passes through the catheter and is connected to the handle grip. The present invention is at least beneficial to improving the positioning accuracy of lesions in minimally invasive surgery.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a visual umbrella-shaped positioning device for micro lesions. Background Art

[0002] For the surgeries of gastrointestinal benign and malignant tumors, the accurate positioning of the lesion is the basis for the successful implementation of the surgery. However, in clinical practice, for a considerable number of lesions such as early gastrointestinal cancers, benign tumors (which cannot be resected endoscopically), small endophytic stromal tumors, etc., due to the small size of the lesions, it is difficult to accurately locate the lesions only by vision or touch. Before the wide popularization of laparoscopic techniques, 1 or several metallic titanium clips were often placed beside the lesion under endoscopy preoperatively to assist in lesion positioning, and during the operation, the lesion could be accurately located by touching the metallic titanium clips by hand. Nowadays, laparoscopic minimally invasive surgery is widely used in gastrointestinal surgery, and its efficacy has also been widely recognized. For lesions such as early gastrointestinal cancers, benign tumors (which cannot be resected endoscopically), small endophytic stromal tumors, etc., it is an excellent indication for laparoscopic minimally invasive surgery. For such lesions, during laparoscopic surgery, the surgeon lacks the direct tactile sensation of the hand. Even if the lesion has been assisted in positioning by placing titanium clips through endoscopy preoperatively, it is difficult to judge the location of the lesion only by touching the intestinal segment between the instruments, thus limiting the accuracy of lesion positioning during laparoscopic minimally invasive surgery. Summary of the Invention

[0003] In view of this, the present invention aims to provide a visual umbrella-shaped positioning device for micro lesions, which is at least beneficial to improving the positioning accuracy of lesions during minimally invasive surgery.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows:

[0005] The present invention provides a tiny lesion visible umbrella-shaped positioning device, comprising: a positioning structure, which includes: a titanium clip, a sleeve, a guide wire and an umbrella-shaped component. 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 out from the first end of the sleeve, and a part 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 out from the second end of the sleeve. The umbrella-shaped component includes an umbrella surface arranged on the outer circle of the sleeve and a plurality of umbrella ribs. The plurality of umbrella ribs support the umbrella surface, and the surface of the umbrella surface has a luminescent material, which can emit light under the excitation of a light source; an introduction structure, which includes a catheter, a handle and a handle grip. 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 handle, the handle grip is arranged on the handle, and the handle grip is slidable relative to the handle. The second end of the guide wire passes through the catheter and is connected to the handle grip; during use, the guide wire is pulled by the handle grip, and the guide wire drives the traction end to slide relative to the sleeve so that the titanium clip clamps at the target position. When the guide wire is pulled in the direction away from the titanium clip to a preset position, the umbrella ribs drive the umbrella surface to unfold. The guide wire is continuously pulled in the direction away from the titanium clip until the guide wire breaks, so that the positioning structure is separated from the introduction structure, and the positioning structure is arranged at the target position through the titanium clip.

[0006] Further, the luminescent material can emit infrared light under the excitation of a visible light source or an ultraviolet light source.

[0007] Further, the titanium clip includes a first clamping portion and a second clamping portion. The first end of the first clamping portion corresponds to the clamping end, the second end of the first clamping portion corresponds to the traction end, the first end of the second clamping portion corresponds to the clamping end, and the second end of the second clamping portion corresponds to the traction end. The second ends of the first clamping portion and the second clamping portion are fixed to the guide wire by set screws; the first clamping portion has a first notch, a first fixing screw passes through the first notch, and both ends of the first fixing screw are fixed on the sleeve; the second clamping portion has a second notch, a second fixing screw passes through the second notch, and both ends of the second fixing screw are fixed on the sleeve.

[0008] Further, the side of the first end of the first clamping portion facing the second clamping portion is serrated, and the side of the first end of the second clamping portion facing the first clamping portion is serrated.

[0009] Furthermore, the sleeve has a plurality of through holes, and the inner ring of the sleeve is connected to the outside of the sleeve through the through holes; the umbrella-shaped assembly also includes a large fixing ring, a plurality of connecting ribs, a small fixing ring, a central sleeve and a release spring, the large fixing ring is sleeved and fixed on the outer ring of the sleeve, the first end of each rib is connected to the large fixing ring, the middle part of each rib is connected to the first end of the corresponding connecting rib, the second end of the connecting rib passes through the corresponding through hole and extends into the inner ring of the sleeve, the central sleeve is located in the inner ring of the sleeve, and is sleeved on the outer ring of the guide wire, the small fixing ring is fixed to the outer ring of the central sleeve, and each connecting rib is connected to the large fixing ring. The second ends of the ribs are connected to the small fixing ring, the first end of the release spring abuts the center sleeve, and the second end of the release spring abuts the second end of the sleeve. When the ribs are in a retracted state, the release spring is in a compressed state; the micro-lesion visual umbrella-shaped positioning device also includes a limiting component, which is used to limit the center sleeve. When the guide wire is pulled to a preset position in a direction away from the titanium clip, the limiting component releases the center sleeve, and the release spring pushes the center sleeve to move in the direction of the titanium clip, so that the first end connected to the ribs extends to the outside of the sleeve, thereby pushing the ribs to drive the umbrella surface to unfold.

[0010] Furthermore, the inner wall of the sleeve has a first mounting hole, the center sleeve has a second mounting hole, the inner ring of the center sleeve is connected to the outside of the center sleeve through the second mounting hole, and the limiting assembly is arranged in the first mounting hole and the second mounting hole. When the limiting assembly limits the center sleeve, the first mounting hole is opposite to the second mounting hole.

[0011] Furthermore, the limiting assembly includes a guide sleeve, a first spring, a trigger ejector pin, a fixed ejector pin, an ejector pin spring and a fixed ejector pin bottom cover, the fixed ejector pin bottom cover is fixed in the first mounting hole, the ejector pin spring connects the fixed ejector pin bottom cover and the fixed ejector pin, the second mounting hole includes a first through hole and a second through hole that are connected to each other, the inner diameter of the first through hole is smaller than the inner diameter of the second through hole, and the connection between the first through hole and the second through hole forms a first step structure, the guide sleeve is arranged in the second through hole, the first spring is sleeved on the outer ring of the trigger ejector pin, and the first end of the first spring contacts the guide sleeve, and the second end of the first spring contacts the first step structure; wherein, the trigger ejector pin passes through the first through hole and the inner ring of the guide sleeve, the first mounting hole When the hole is directly opposite to the second mounting hole, the end of the fixed ejector pin away from the ejector pin spring contacts the first end of the trigger ejector pin, and the end of the fixed ejector pin away from the ejector pin spring extends into the first through hole, and the second end of the trigger ejector pin contacts a portion of the guide wire located on the inner ring of the center sleeve, and in the direction from the second end of the sleeve to the first end of the sleeve, the side of the guide wire in contact with the trigger ejector pin gradually tilts toward the sleeve; when the limiting assembly limits the center sleeve, the guide wire is pulled in a direction away from the titanium clip, and the inclined side of the guide wire pushes the trigger ejector pin to move toward the fixed ejector pin, and the trigger ejector pin pushes the fixed ejector pin to move toward the bottom cover of the fixed ejector pin. When the end of the fixed ejector pin away from the ejector pin spring detaches from the first through hole, the limiting assembly releases the center sleeve.

[0012] Furthermore, the guide wire has a strip groove, which extends along the extension direction of the guide wire. In the direction from the second end of the sleeve to the first end of the sleeve, the bottom surface of the strip groove gradually tilts toward the sleeve, and the bottom surface of the strip groove is used to contact the trigger ejector pin.

[0013] Furthermore, the positioning structure also includes a bottom seal, which is arranged at the second end of the catheter and connects the sleeve and the catheter. The second end of the release spring abuts the bottom seal, and the guide wire passes through the inner circle of the bottom seal and extends into the catheter.

[0014] Furthermore, along the direction of the sleeve pointing to the catheter, the bottom seal includes a first part and a second part connected in sequence, and the inner diameter of the first part is smaller than the inner diameter of the second part; the outer ring of the guide wire that passes through the bottom seal has an anti-slip component, and when the guide wire is pulled in a direction away from the titanium clamp, the anti-slip component passes through the inner ring of the first part and enters the inner ring of the second part, and then the anti-slip component is unfolded, and the width of the unfolded anti-slip component is greater than the inner diameter of the first part.

[0015] Compared with the prior art, the invention can achieve the following beneficial effects: the tiny lesion visual umbrella-shaped positioning device provided by the invention is applied to minimally invasive surgery to position the lesion. Specifically, the positioning structure can be fixed at the position where the lesion is located or at a position adjacent to the lesion by a titanium clip. The opening and closing of the titanium clip of the positioning structure can be controlled by structures such as a guide wire and a handle, that is, the opening and closing of the titanium clip in the body can be controlled in vitro. The clamping position of the first clamping part and the second clamping part of the titanium clip is designed to be a serrated structure, which can improve the success rate of titanium clip fixation during use and ensure that the titanium clip is not easy to fall off after being clamped. In addition, an umbrella surface with luminescent material is provided on the outer ring of the sleeve. After the titanium clip clamps the target position, the umbrella surface is controlled to unfold by further pulling the guide wire. In this way, the design of the umbrella surface makes the luminescent material setting area in the positioning structure larger, and the light intensity generated by the luminescent material is also stronger, which makes it more convenient to locate the positioning structure during surgery, thereby helping to improve the positioning accuracy of the lesion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of the structure of the positioning structure of the umbrella-shaped positioning device for visually positioning micro-lesions according to an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the structure of the introduction structure of the umbrella-shaped positioning device for visually locating micro-lesions according to an embodiment of the present invention;

[0019] Figure 3Schematic three-dimensional structure diagram of the positioning structure of the micro-lesion visible umbrella-shaped positioning device according to the embodiment of the present invention;

[0020] Figure 4 Partial structure schematic diagram of the positioning structure of the micro-lesion visible umbrella-shaped positioning device according to the embodiment of the present invention;

[0021] Figure 5 Enlarged schematic diagram of a partial structure of the positioning structure of the micro-lesion visible umbrella-shaped positioning device according to the embodiment of the present invention;

[0022] Figure 6 Schematic diagram of the structure of a partial guide wire of the micro-lesion visible umbrella-shaped positioning device according to the embodiment of the present invention;

[0023] Figure 7 Schematic diagram of the structure of a partial guide wire and a central sleeve of the micro-lesion visible umbrella-shaped positioning device according to the embodiment of the present invention;

[0024] Figure 8 Schematic diagram of the structure of the bottom seal and a partial guide wire of the micro-lesion visible umbrella-shaped positioning device according to the embodiment of the present invention;

[0025] Figure 9 Schematic diagram of the structure of the sleeve of the micro-lesion visible umbrella-shaped positioning device according to the embodiment of the present invention.

[0026] Explanation of reference numerals: 1, titanium clip; 2, sleeve; 5, guide wire; 3, fixing screw; 19, umbrella surface; 7, umbrella rib; 20, catheter; 21, working handle; 22, handle; 16, fixed thimble; 31, first fixing screw; 32, second fixing screw; 110, first clamping part; 120, second clamping part; 4, set screw; 41, first notch; 42, second notch; 43, through hole; 6, large fixing ring; 8, connecting umbrella rib; 9, small fixing ring; 10, central sleeve; 11, release spring; 200, limiting component; 111, first groove; 113, annular limiting groove; 112, sliding part; 44, sliding groove; 45, first mounting hole; 114, second mounting hole; 13, guide shaft sleeve; 14, first spring; 15, trigger thimble; 17, thimble spring; 18, fixed thimble bottom seal; 51, strip-shaped groove; 12, bottom seal; 121, first part; 122, second part; 123, anti-disengagement part; 1141, first through hole; 1142, second through hole; 52, annular fracture groove. Detailed implementation manners

[0027] After analysis, it is found that the existing methods for positioning lesions using titanium clips mainly include the following two: The first method: During the operation, the doctor locates the position of the titanium clip by touching and then determines the lesion position; The second method: When it is difficult to locate the titanium clip by touching, it is necessary to insert a gastroscope to assist in positioning. The above two methods have the following problems: During laparoscopic surgery, the surgeon lacks the direct tactile sensation of the hand. Even if the lesion has been assisted in positioning by inserting a titanium clip through an endoscope before the operation, it is difficult to judge the lesion position only by touching the intestinal segment between the instruments; Intraoperative endoscopy (inserting a gastroscope) prolongs the operation time, increases the operating cost of the operating room, and the anesthesia time of the patient is also correspondingly prolonged; Since the gastroscope is always connected to an external device, a large amount of gas will be injected into the intestinal cavity during the operation, resulting in obvious intestinal dilation, occupying the abdominal cavity space, increasing the difficulty of laparoscopic surgery, and even forcing a conversion to open surgery; For colonic lesions, the patient's position has been set before intraoperative colonoscopy, and some or even all of the trocar punctures have been completed. At this time, if the positioning does not match the preoperative assessment, it is necessary to reselect the position and trocar puncture position, which increases unnecessary procedures and does not well reflect the principle of minimally invasive surgery; Intraoperative endoscopy requires the joint cooperation of professional endoscopists, nurses and disinfection teams, consuming human resources; Intraoperative endoscopy requires the operating room to be equipped with a dedicated full set of endoscopic equipment.

[0028] To solve the above problems, the present invention provides a visual umbrella-shaped positioning device for micro-lesions. Considering that since the titanium clip is small, forming a luminescent material on the titanium clip may cause the light source emitted by the luminescent material to be too small to be easily detected, and considering that if the contact between the titanium clip and the target position to be clamped is small, it is easy for the titanium clip to fall off, the present invention sets an expandable umbrella surface in the positioning structure, and a luminescent material is arranged on the umbrella surface. The luminescent material can emit infrared light under the excitation of ultraviolet light or visible light. In this way, the umbrella surface increases the setting area of the luminescent material. During the operation, after irradiating with a corresponding light source, the positioning structure can be conveniently and accurately located, and then the resection of the lesion can be realized. In addition, a serrated structure and an anti-detachment member are also provided to improve the clamping stability of the titanium clip to the target position, which is beneficial to avoiding the titanium clip from falling off.

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the following further details the present invention in combination with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation to the present invention.

[0030] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0033] The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0034] Reference Figures 1 to 9, the present invention provides a micro-lesion visible umbrella-shaped positioning device, including: a positioning structure, which includes: a titanium clip 1, a sleeve 2, a guide wire 5 and an umbrella-shaped component. The first end of the titanium clip 1 is a clamping end, and the clamping end is used to clamp the target position, which is the position where the lesion is located or the position adjacent to the lesion. The second end of the titanium clip 1 is a traction end. The clamping end extends out from the first end of the sleeve 2. A part of the titanium clip 1 between the clamping end and the traction end is slidably connected to the sleeve 2 through 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 out from the second end of the sleeve 2. The umbrella-shaped component includes an umbrella surface 19 and a plurality of umbrella ribs 7 arranged on the outer circle of the sleeve 2. The plurality of umbrella ribs 7 support the umbrella surface 19, and the surface of the umbrella surface 19 has a luminescent material, which can emit light under the excitation of a light source; an introduction structure, which includes a catheter 20, a working handle 21 and a handle 22. The first end of the catheter 20 is connected to the second end of the sleeve 2, the second end of the catheter 20 is connected to the working handle 21, the handle 22 is arranged on the working handle 21, and the handle 22 is slidable relative to the working handle 21. The second end of the guide wire 5 passes through the catheter 20 and is connected to the handle 22.

[0035] During use, by pulling the guide wire 5 through the handle 22, the guide wire 5 drives the traction end to slide relative to the sleeve 2, so that the titanium clip 1 clamps the target position. When the guide wire 5 is pulled in the direction away from the titanium clip 1 to a preset position, the umbrella ribs 7 drive the umbrella surface 19 to unfold. Continuing to pull the guide wire 5 in the direction away from the titanium clip 1 until the guide wire 5 breaks, so that the positioning structure is separated from the introduction structure, and the positioning structure is arranged at the target position through the titanium clip 1.

[0036] It should be noted that in the drawings provided by the present invention, in order to clearly show the structure below the umbrella surface 19, only a part of the umbrella surface 19 is shown. The actual umbrella surface is a whole umbrella surface 19 surrounding the sleeve 2. Additionally, it should be further noted that by pulling the guide wire 5 in the direction away from the titanium clip 1 through the handle 22, the closing operation of the titanium clip 1 can be realized, and by pushing the guide wire 5 in the direction of the titanium clip 1 through the handle 22, the opening operation of the titanium clip 1 can be realized.

[0037] It can be understood that the umbrella surface 19 has two opposite surfaces. In some embodiments, both of the two opposite surfaces of the umbrella surface 19 have a luminescent material. In this way, the setting area of the luminescent material can be increased, which is beneficial to further reducing the positioning difficulty of the positioning structure and making it easier to locate the positioning structure during the operation.

[0038] In some embodiments, silicone and powdered luminescent material are mixed and coated on the surface of the umbrella surface 19. In other embodiments, the bonding method of the luminescent material and the umbrella surface 19 can also be fixed forms such as spraying and gluing. The present invention does not limit the fixing method of the luminescent material, as long as it is ensured that the surface of the umbrella surface has a luminescent material.

[0039] In some embodiments, the luminescent material can emit infrared light under the excitation of a visible light source or an ultraviolet light source.

[0040] It should be noted that when the guide wire 5 is disconnected, the positioning structure stays at the target position. By irradiating with a light source that excites the luminescent material to emit light, the positioning structure can be accurately and quickly located, thereby realizing the positioning of the lesion. The positioning structure is removed simultaneously with the lesion during the surgical resection of the lesion. In addition, the irradiation form of the light source can be direct irradiation into the body, introduction into the body through an optical fiber, or direct irradiation outside the body, etc.

[0041] In some embodiments, the luminescent material is a near-infrared phosphor with good chemical stability, non-toxicity, strong beam penetration ability and high luminous efficiency, that is, a NIR (near-infrared) fluorescent agent. Its specific materials can include Ca 2 LuHf 2 Al 3 O 12 :Cr 3+ . Using the near-infrared phosphor as the luminescent material, an infrared camera can be used to image the luminous umbrella surface 19 located inside the gastrointestinal tract, which is beneficial to accurately locate the positioning structure.

[0042] In some embodiments, the fixing screw 3 includes a first fixing screw 31 and a second fixing screw 32. The titanium clip 1 includes a first clamping portion 110 and a second clamping portion 120. The first end of the first clamping portion 110 corresponds to the clamping end, the second end of the first clamping portion 110 corresponds to the traction end, the first end of the second clamping portion 120 corresponds to the clamping end, and the second end of the second clamping portion 120 corresponds to the traction end. The second ends of the first clamping portion 110 and the second clamping portion 120 are fixed to the guide wire 5 through a set screw 4; the first clamping portion 110 has a first notch 41, the first fixing screw 31 passes through the first notch 41, and both ends of the first fixing screw 31 are fixed on the sleeve 2; the second clamping portion 120 has a second notch 42, the second fixing screw 32 passes through the second notch 42, and both ends of the second fixing screw 32 are fixed on the sleeve 2. Thus, when the guide wire 5 drives the traction end to move, the second clamping portion 120 slides relative to the second fixing screw 32. Since the second fixing screw 32 is arranged in the second notch 42, the second fixing screw 32 makes the second clamping portion 120 slide along a fixed track. Similarly, when the guide wire 5 drives the traction end to move, the first clamping portion 110 slides relative to the first fixing screw 31. Since the first fixing screw 31 is arranged in the first notch 41, the first fixing screw 31 makes the first clamping portion 110 slide along a fixed track. Thus, the opening and closing of the titanium clip 1 can be controlled by the guide wire 5.

[0043] In some embodiments, the first end of the first clamping portion 110 is serrated toward one side of the second clamping portion 120, and the first end of the second clamping portion 120 is serrated toward one side of the first clamping portion 110. That is, the clamping position of the titanium clip is designed to be serrated, which can improve the success probability of fixing the titanium clip 1 to the target position during use and ensure that the titanium clip 1 is not easily detached after being clamped.

[0044] In some embodiments, the sleeve 2 has a plurality of through holes 43, and the inner ring of the sleeve 2 communicates with the outside of the sleeve 2 through the through holes 43; the umbrella-shaped assembly further includes a large fixing ring 6, a plurality of connecting umbrella ribs 8, a small fixing ring 9, a central sleeve 10 and a release spring 11. The large fixing ring 6 is sleeved and fixed on the outer ring of the sleeve 2. The first end of each umbrella rib 7 is connected to the large fixing ring 6. The middle part of each umbrella rib 7 is connected to the first end of the corresponding connecting umbrella rib 8. The second end of the connecting umbrella rib 8 passes through the corresponding through hole 43 and extends into the inner ring of the sleeve 2. The central sleeve 10 is located in the inner ring of the sleeve 2 and is sleeved on the outer circle of the guide wire 5. The small fixing ring 9 is fixed on the outer circle of the central sleeve 10. The second end of each connecting umbrella rib 8 is connected to the small fixing ring 9. The first end of the release spring 11 abuts against the central sleeve 10, and the second end of the release spring 11 abuts against the second end of the sleeve 2. When the umbrella rib 7 is in a contracted state, the release spring 11 is in a compressed state; the micro-lesion visible umbrella-shaped positioning device further includes a limiting component 200 for limiting the central sleeve 10. When the guide wire 5 is pulled away from the titanium clip 1 to a preset position, the limiting component 200 releases the central sleeve 10, and the release spring 11 pushes the central sleeve 10 toward the titanium clip 1, so that the first end of the connecting umbrella rib 8 extends toward the outside of the sleeve 2, and further pushes the umbrella rib 7 to drive the umbrella surface 19 to unfold.

[0045] In some embodiments, the umbrella-shaped assembly may include 6 groups of corresponding umbrella ribs 7 and connecting umbrella ribs 8.

[0046] In some embodiments, the surface of the sleeve 2 has a groove. When the umbrella surface 19 is in a contracted state, the umbrella rib 7 and the large fixing ring 6 are both arranged in the groove. In this way, it is beneficial to ensure that the side surface of the positioning structure is a relatively smooth surface, and when the sleeve 2 is introduced into the body, it can avoid scraping the internal tissues of the body.

[0047] In some embodiments, the side surface of the central sleeve 10 also has a corresponding first groove 111, and the small fixing ring 9 is arranged in the first groove 111 on the side surface of the central sleeve 10.

[0048] In some embodiments, the side of the central sleeve 10 facing the release spring 11 has an annular limiting groove 113 for arranging the release spring 11.

[0049] In some embodiments, the outer side surface of the central sleeve 10 has a protruding sliding portion 112, and the inner wall of the sleeve 2 has a sliding groove 44. The sliding portion 112 is arranged in the sliding groove 44. In this way, the sliding portion 112 and the sliding groove 44 guide the sliding of the central sleeve 10 relative to the sleeve 2, which is beneficial to improving the stability of the sliding.

[0050] In some embodiments, the sleeve 2 has a first mounting hole 45, and the central sleeve 10 has a second mounting hole 114. The inner ring of the central sleeve 10 communicates with the outside of the central sleeve 10 through the second mounting hole 114. When the limiting component 200 is arranged in the first mounting hole 45 and the second mounting hole 114, and the limiting component 200 limits the central sleeve 10, the first mounting hole 45 is aligned with the second mounting hole 114.

[0051] In some embodiments, the limiting component 200 includes a guiding bushing 13, a first spring 14, a trigger ejector pin 15, a fixed ejector pin 16, an ejector pin spring 17, and a fixed ejector pin bottom seal 18. The fixed ejector pin bottom seal 18 is fixed in the first mounting hole 45. The ejector pin spring 17 connects the fixed ejector pin bottom seal 18 and the fixed ejector pin 16. The second mounting hole 114 includes a first through hole 1141 and a second through hole 1142 that are communicated with each other. The inner diameter of the first through hole 1141 is smaller than the inner diameter of the second through hole 1142. The connection part between the first through hole 1141 and the second through hole 1142 forms a first stepped structure. The guiding bushing 13 is arranged in the second through hole 1142. The first spring 14 is sleeved on the outer circle of the trigger ejector pin 15, and the first end of the first spring 14 contacts the guiding bushing 13, and the second end of the first spring 14 contacts the first stepped structure. Among them, the trigger ejector pin 15 penetrates through the inner circle of the first through hole 1141 and the guiding bushing 13. When the first mounting hole 45 is aligned with the second mounting hole 114, the end of the fixed ejector pin 16 away from the ejector pin spring 17 contacts the first end of the trigger ejector pin 15, and the end of the fixed ejector pin 16 away from the ejector pin spring 17 extends into the first through hole 1141. The second end of the trigger ejector pin 15 contacts a part of the guide wire 5 located in the inner circle of the central sleeve 10. Along the direction from the second end of the sleeve 2 to the first end of the sleeve 2, the side surface of the guide wire 5 in contact with the trigger ejector pin 15 gradually inclines towards the sleeve 2. When the limiting component 200 limits the central sleeve 10, when the guide wire 5 is pulled in the direction away from the titanium clip 1, the inclined side surface of the guide wire 5 pushes the trigger ejector pin 15 to move towards the fixed ejector pin 16, and the trigger ejector pin 15 pushes the fixed ejector pin 16 to move towards the fixed ejector pin bottom seal 18. When the end of the fixed ejector pin 16 away from the ejector pin spring 17 disengages from the first through hole 1141, the limiting component 200 releases the central sleeve 10, thereby realizing the unfolding operation of the umbrella surface 19.

[0052] Among them, the fixed ejector pin bottom seal 18 is used to fix the ejector pin spring 17 and the fixed ejector pin 16 in the first mounting hole 45 of the sleeve 2.

[0053] In some embodiments, the guide wire 5 has a strip-shaped groove 51 that extends along the extension direction of the guide wire 5. Along the direction from the second end of the sleeve 2 to the first end of the sleeve 2, the bottom surface of the strip-shaped groove 51 gradually inclines towards the sleeve 2. The bottom surface of the strip-shaped groove 51 is used to contact the trigger ejector pin 15, and the second end of the trigger ejector pin 15 can extend into the strip-shaped groove 51 to ensure that the second end of the trigger ejector pin 15 contacts the bottom surface of the strip-shaped groove 51.

[0054] In some embodiments, the positioning structure further includes a bottom seal 12. The bottom seal 12 is disposed at the second end of the catheter 20, and the bottom seal 12 connects the sleeve 2 and the catheter 20. The second end of the release spring 11 abuts against the bottom seal 12, and the guide wire 5 passes through the inner ring of the bottom seal 12 and extends into the catheter 20. When the positioning structure is separated from the guiding structure, the bottom seal 12 is separated from the catheter 20.

[0055] In some embodiments, along the direction from the sleeve 2 to the catheter 20, the bottom seal 12 includes a first part 121 and a second part 122 that are sequentially connected. The inner diameter of the first part 121 is smaller than the inner diameter of the second part 122. An anti-disengagement member 123 is provided on the outer circumference of a part of the guide wire 5 passing through the bottom seal 12. When the guide wire 5 is pulled in the direction away from the titanium clip 1, after the anti-disengagement member 123 passes through the inner ring of the first part 121 and enters the inner ring of the second part 122, the anti-disengagement member 123 unfolds, and the width of the unfolded anti-disengagement member 123 is greater than the inner diameter of the first part 121. In this way, the second part 122 and the anti-disengagement member 123 cooperate to limit the guide wire 5 at the position for controlling the closing of the titanium clip 1, avoiding the titanium clip falling off from the target position after the guide wire 5 breaks.

[0056] In some embodiments, the guide wire 5 has an annular fracture groove 52 located on a part of the guide wire 5 between the anti-disengagement member 123 and the handle 22. When the guide wire 5 is broken, it breaks from the annular fracture groove 52.

[0057] In some embodiments, the working principle of the micro-lesion visible umbrella-shaped positioning device provided by the present invention is as follows: The positioning structure is transported to the lesion position through the catheter 20 using the dedicated channel of the gastroscope. The handle 22 is pulled to drive the guide wire 5 to move, thereby controlling the opening and closing of the titanium clip 1 to complete the clamping task. When the guide wire 5 moves, the bottom surface of the strip-shaped groove 51 thereon contacts the second end of the trigger ejector pin 15, and the trigger ejector pin 15 moves axially along the guide bushing 13 relative to the guide bushing 13, so that the fixed ejector pin 16 disengages from the first through hole 1141, and further the central sleeve 10 is released from the limit. The compressed release spring 11 releases elastic force, causing the central sleeve 10 to move towards the titanium clip 1. The central sleeve 10 drives the umbrella surface 19 to unfold. When the guide wire 5 is broken, the positioning structure stays at the target position. During the operation, the positioning of the positioning structure is realized by irradiating with a light source that can excite the luminescent material to emit light, which can reduce the operation time and the required equipment, reduce the operation cost, and increase the operation efficiency.

[0058] In some embodiments, the assembly method of the tiny lesion visible umbrella-shaped positioning device provided by the present invention is as follows: First, place the fixed thimble 16 in the first mounting hole 45 of the sleeve 2, and at the same time place the thimble spring 17 behind the fixed thimble 16, and fix the thimble spring 17 and the fixed thimble 16 through the fixed thimble bottom seal 18; Second, use the large fixing ring 6 to fix the umbrella ribs 7 on the sleeve 2, connect the connecting umbrella ribs 8 to the umbrella ribs 7, and fix them on the central sleeve 10 through the small fixing ring 9, and fix the umbrella surface 19 on the umbrella ribs 7; Next, place the first spring 14 and the trigger thimble 15 in the corresponding positions of the central sleeve 10, and complete the fixation through the guide bushing 13; Finally, use the set screw 4 to connect the titanium clip 1 and the guide wire 5, pass the guide wire 5 through the sleeve 2 and the catheter 20 and connect it to the handle 22, and install the handle 22 on the working handle 21. The working handle 21 is fixed to the catheter 20 through a threaded structure, and the fixing screw passes through the notch opened on the titanium clip 1 and is fixed on the sleeve 2 to complete the overall assembly.

[0059] The tiny lesion visible umbrella-shaped positioning device provided by the present invention is applied in minimally invasive surgery. Therefore, in some embodiments, the outer diameter dimension of the sleeve is in the range of 2 mm to 2.3 mm, and the outer diameter dimension of the working handle is in the range of 10 mm to 12 mm. In this way, it is beneficial to ensure that the size of the end entering the human body is small.

[0060] In addition, it should be noted that the actual length of the catheter in the present invention can be in the range of 1900 mm to 2100 mm.

[0061] It should be understood that the various forms of the process shown above can be used, steps can be reordered, added or deleted. For example, the steps recorded in the disclosure of the present invention can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solutions disclosed in the present invention can be achieved, and no limitations are imposed herein.

[0062] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. 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 principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A visual umbrella-shaped positioning device for micro-lesions, characterized in that: include: A positioning structure, the positioning structure comprising: a titanium clip (1), a sleeve (2), a guide wire (5) and an umbrella-shaped component, the first end of the titanium clip (1) being a clamping end, the second end of the titanium clip (1) being a traction end, the clamping end extending from the first end of the sleeve (2), the titanium clip (1) being slidably connected to the sleeve (2) at a portion between the clamping end and the traction end, the traction end being connected to the first end of the guide wire (5), and the second end of the guide wire (5) extending from the second end of the sleeve (2), the umbrella-shaped component comprising an umbrella surface (19) and a plurality of umbrella ribs (7) arranged on the outer ring of the sleeve (2), the plurality of umbrella ribs (7) supporting the umbrella surface (19), the surface of the umbrella surface (19) having a luminescent material, the luminescent material being able to emit light under the excitation of a light source; An introduction structure, the introduction structure comprising a catheter (20), a working handle (21) and a handle (22), the first end of the catheter (20) being connected to the second end of the sleeve (2), the second end of the catheter (20) being connected to the working handle (21), the handle (22) being arranged on the working handle (21), and the handle (22) being slidable relative to the working handle (21), and the second end of the guide wire (5) passing through the catheter (20) and being connected to the handle (22); During use, the guide wire (5) is pulled by the handle (22), and the guide wire (5) drives the traction end to slide relative to the sleeve (2), so that the titanium clip (1) is clamped at the target position. When the guide wire (5) is pulled in a direction away from the titanium clip (1) to a preset position, the ribs (7) drive the umbrella surface (19) to unfold, and the guide wire (5) is continued to be pulled in a direction away from the titanium clip (1) until the guide wire (5) is disconnected, so that the positioning structure is separated from the introduction structure, and the positioning structure is set at the target position through the titanium clip (1).

2. The micro-lesion visual umbrella-shaped positioning device according to claim 1, characterized in that: The luminescent material can emit infrared light under the excitation of a visible light source or an ultraviolet light source.

3. The micro-lesion visual umbrella-shaped positioning device according to claim 1, characterized in that: The titanium clamp (1) comprises a first clamping portion (110) and a second clamping portion (120), wherein the first end of the first clamping portion (110) corresponds to the clamping end, the second end of the first clamping portion (110) corresponds to the traction end, the first end of the second clamping portion (120) corresponds to the clamping end, the second end of the second clamping portion (120) corresponds to the traction end, and the second end of the first clamping portion (110) and the second end of the second clamping portion (120) are fixed to the guide wire (5) by a set screw (4); The first clamping portion (110) has a first notch (41), the first fixing screw (31) passes through the first notch (41), and both ends of the first fixing screw (31) are fixed to the sleeve (2); The second clamping portion (120) has a second notch (42), the second fixing screw (32) passes through the second notch (42), and both ends of the second fixing screw (32) are fixed on the sleeve (2).

4. The micro-lesion visual umbrella-shaped positioning device according to claim 3, characterized in that: The first end of the first clamping portion (110) is in a sawtooth shape on the side facing the second clamping portion (120), and the first end of the second clamping portion (120) is in a sawtooth shape on the side facing the first clamping portion (110).

5. The micro-lesion visual umbrella-shaped positioning device according to claim 1, characterized in that: The sleeve (2) has a plurality of through holes (43), and the inner ring of the sleeve (2) is connected to the outside of the sleeve (2) through the through holes (43); The umbrella-shaped assembly further comprises a large fixing ring (6), a plurality of connecting ribs (8), a small fixing ring (9), a central sleeve (10) and a release spring (11); the large fixing ring (6) is sleeved and fixed on the outer ring of the sleeve (2); the first end of each rib (7) is connected to the large fixing ring (6); the middle part of each rib (7) is connected to the first end of the corresponding connecting rib (8); the second end of the connecting rib (8) passes through the corresponding through hole (43) and extends into the inner part of the sleeve (2). The central sleeve (10) is located in the inner ring of the sleeve (2) and is sleeved on the outer ring of the guide wire (5); the small fixing ring (9) is fixed to the outer ring of the central sleeve (10); the second end of each of the connecting ribs (8) is connected to the small fixing ring (9); the first end of the release spring (11) abuts against the central sleeve (10); the second end of the release spring (11) abuts against the second end of the sleeve (2); when the rib (7) is in a contracted state, the release spring (11) is in a compressed state; The micro-lesion visual umbrella-shaped positioning device further comprises a limiting assembly (200), wherein the limiting assembly (200) is used to limit the central sleeve (10); when the guide wire (5) is pulled in a direction away from the titanium clip (1) to a preset position, the limiting assembly (200) releases the central sleeve (10), and the release spring (11) pushes the central sleeve (10) to move in the direction of the titanium clip (1), so that the first end of the connecting rib (8) extends toward the outside of the sleeve (2), thereby pushing the rib (7) to drive the umbrella cover (19) to unfold.

6. The micro-lesion visual umbrella-shaped positioning device according to claim 5, characterized in that: The sleeve (2) has a first mounting hole (45), the center sleeve (10) has a second mounting hole (114), the inner ring of the center sleeve (10) is connected to the outside of the center sleeve (10) through the second mounting hole (114), the limiting component (200) is arranged in the first mounting hole (45) and the second mounting hole (114), and when the limiting component (200) limits the center sleeve (10), the first mounting hole (45) and the second mounting hole (114) are opposite.

7. The micro-lesion visual umbrella-shaped positioning device according to claim 6, characterized in that: The limit assembly (200) comprises a guide sleeve (13), a first spring (14), a trigger ejector pin (15), a fixed ejector pin (16), an ejector pin spring (17), and a fixed ejector pin bottom cover (18); the fixed ejector pin bottom cover (18) is fixed in the first mounting hole (45); the ejector pin spring (17) connects the fixed ejector pin bottom cover (18) and the fixed ejector pin (16); the second mounting hole (114) comprises a first through hole (1141) and a second through hole (1142) that are connected to each other; The inner diameter of the first through hole (1141) is smaller than the inner diameter of the second through hole (1142); the connection between the first through hole (1141) and the second through hole (1142) forms a first step structure; the guide sleeve (13) is arranged in the second through hole (1142); the first spring (14) is sleeved on the outer ring of the trigger ejector pin (15); the first end of the first spring (14) contacts the guide sleeve (13); and the second end of the first spring (14) contacts the first step structure; The trigger ejector pin (15) passes through the first through hole (1141) and the inner ring of the guide sleeve (13); when the first mounting hole (45) is aligned with the second mounting hole (114), one end of the fixed ejector pin (16) away from the ejector spring (17) contacts the first end of the trigger ejector pin (15); and one end of the fixed ejector pin (16) away from the ejector spring (17) extends into the first through hole (1141); the second end of the trigger ejector pin (15) contacts the portion of the guide wire (5) located on the inner ring of the central sleeve (10); and in a direction from the second end of the sleeve (2) to the first end of the sleeve (2), the side of the guide wire (5) in contact with the trigger ejector pin (15) gradually tilts toward the sleeve (2); When the limiting assembly (200) limits the center sleeve (10), the guide wire (5) is pulled in a direction away from the titanium clamp (1), and the inclined side of the guide wire (5) pushes the trigger ejector pin (15) to move toward the fixed ejector pin (16). The trigger ejector pin (15) pushes the fixed ejector pin (16) to move toward the fixed ejector pin bottom cover (18). When one end of the fixed ejector pin (16) away from the ejector pin spring (17) is disengaged from the first through hole (1141), the limiting assembly (200) releases the center sleeve (10).

8. The micro-lesion visual umbrella-shaped positioning device according to claim 7, characterized in that: The guide wire (5) has a strip groove (51), and the strip groove (51) extends along the extension direction of the guide wire (5), and in the direction from the second end of the sleeve (2) to the first end of the sleeve (2). The bottom surface of the strip groove (51) gradually inclines toward the sleeve (2), and the bottom surface of the strip groove (51) is used to contact the trigger ejector pin (15).

9. The micro-lesion visual umbrella-shaped positioning device according to claim 5, characterized in that: The positioning structure further comprises a bottom seal (12), wherein the bottom seal (12) is arranged at the second end of the catheter (20), and the bottom seal (12) connects the sleeve (2) and the catheter (20), the second end of the release spring (11) abuts against the bottom seal (12), and the guide wire (5) passes through the inner circle of the bottom seal (12) and extends into the catheter (20).

10. The micro-lesion visual umbrella-shaped positioning device according to claim 9, characterized in that: Along the direction from the sleeve (2) to the conduit (20), the bottom seal (12) comprises a first part (121) and a second part (122) connected in sequence, and the inner diameter of the first part (121) is smaller than the inner diameter of the second part (122); The outer ring of the guide wire (5) that passes through the bottom seal (12) has an anti-slip component (123). When the guide wire (5) is pulled in a direction away from the titanium clamp (1), the anti-slip component (123) passes through the inner ring of the first part (121) and enters the inner ring of the second part (122). Thereafter, the anti-slip component (123) is unfolded, and the width of the unfolded anti-slip component (123) is greater than the inner diameter of the first part (121).

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