Linear cutting and closing device for polyp resection under endoscope

Abstract

The invention discloses a linear cutting and closing device for polyp resection under an endoscope, relates to the technical field of medical closing devices, and aims to solve the technical problems that perforation is easily generated in linear cutting and closing cutting, and repeated cutting is needed. Magnetic attraction linkage is taken as a core, the clamping force of the closed clamp is accurately controlled through the first magnetic attraction block, and a fine adjustment structure and a clamping limiting design are matched, so that sufficient clamping and one-time complete excision of a polyp are realized, and multiple times of cutting are avoided; the flexible lead body and the miniaturized structure are matched with an endoscope channel, so that the operation flexibility of a complex digestive tract is improved; the automatic conveying and clamping structure can immediately close the wound surface, and the bleeding and perforation risks are reduced; the whole-course button control simplifies operation, the elastic reset assembly reduces manual steps, and the operation time is shortened. The operation safety, the operation convenience and the adaptability are considered on the whole, the complication occurrence rate is effectively reduced, and the clinical treatment effect and efficiency of the endoscopic polyp resection operation are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of medical closure technology, and more specifically, to a linear cutting closure device for endoscopic polyp removal. Background Technology

[0002] In clinical gastroenterology, minimally invasive treatment of gastrointestinal lesions such as gastrointestinal polyps and stromal tumors has become the mainstream trend. Endoscopic submucosal dissection (ESD) and endoscopic mucosal resection (EMR) are widely used in clinical diagnosis and treatment due to their advantages of minimal trauma and rapid recovery. These surgeries require the removal of diseased tissue through an endoscopic channel, followed by wound management to achieve radical cure of the lesion and preservation of the integrity of the digestive tract wall. They are key medical methods to ensure postoperative recovery and reduce the risk of complications for patients.

[0003] However, existing ESD and EMR surgeries still face several technical challenges in clinical application. Firstly, the risk of perforation and enterocutaneous fistula is high. Due to the thin structure of the digestive tract wall, during the resection of large polyps or deep stromal tumors, improper control of the cutting depth and excessive wound tension can easily lead to perforation of the digestive tract wall. The incidence of postoperative enterocutaneous fistula can reach 3% to 8%, requiring emergency open surgery for repair in severe cases, significantly increasing patient suffering and medical burden. Secondly, the completeness of polyp resection is insufficient. For broad-based polyps or irregular stromal tumors larger than 2 cm in diameter, existing endoscopic instruments cannot achieve complete resection in one procedure, often requiring multiple cuts. This not only prolongs the operation time but also may lead to recurrence due to residual lesion tissue, requiring some patients to undergo a second surgery, thus increasing anesthesia risks and treatment costs. Thirdly, the adaptability of existing closure devices is limited. Traditional linear cutting closure devices are mostly designed for open or laparoscopic surgery, and are relatively large, making it difficult to access the digestive tract through the narrow endoscopic passage. Some endoscopic-specific closure devices use mechanical transmission control, which suffers from insufficient operational flexibility and short remote control distance, failing to accurately adapt to the complex anatomy of the gastrointestinal tract and affecting the reliability of suture closure. Therefore, we propose a linear cutting closure device for endoscopic polyp removal. Summary of the Invention

[0004] The purpose of this invention is to provide a linear cutting and closure device for endoscopic polyp removal, so as to solve the technical problems of easy perforation and the need for multiple cuts during linear cutting and closure.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a linear cutting and closing device for endoscopic polyp removal, comprising a lead wire, a fixing ring fixed at one end of the lead wire, two symmetrical rotating blocks rotatably connected to the inner circumference of the fixing ring, a closing clamp connected to one side of each rotating block, a closing magnetic attraction structure between the two rotating blocks, and a fine adjustment structure connected to the other end of the lead wire, wherein a control button is provided on the fine adjustment structure;

[0006] The closed magnetic attraction structure consists of a spring sheet and two first magnetic blocks. The first magnetic blocks are embedded in one side of the rotating block. The first magnetic blocks are connected to a control switch and controlled by a control button. The spring sheet is curved and made of elastic material. One side of the spring sheet is fixed to the outer periphery of the rotating block.

[0007] The closed clamp is provided with a fine-tuning structure, which includes a pressing part, a bending plate and a tensioning part. The end of the tensioning part passes through a tension piece and is rotatably connected to a rotating block. A constraint member is provided on one side of the fine-tuning structure to constrain the position of the tensioning part.

[0008] Preferably, the pressing part includes a tension section, one end of which is fixed to the side wall of the closing clamp. The tension section is made of elastic material and has a wavy structure. A pressure bar extends from one side of the tension section, and the pressure bar has a concave-convex needle-like shape on one side.

[0009] Preferably, the tensioning part is made of an elastic material, the upper half of the tensioning part is a semi-circular curved shape, multiple oblique thorns are provided on the outer periphery of the tensioning part, the two ends of the bending plate are fixed to the tensioning part and the thorn section respectively, and the bending plate is an arc-shaped plate that bends obliquely upward towards the tensioning part.

[0010] Preferably, the constraint member includes a side guide plate fixed to the inner wall of the closing clamp, the side guide plate is located on one side of the tension section, the bottom end of the side guide plate is connected to an extension plate, the bottom of the extension plate is connected to a constraint sleeve, the constraint sleeve has a curved sliding groove adapted to the bending plate, the constraint member also includes a side pull plate and a side pressure plate, the side pressure plate is an elastic sheet, one end of the side pressure plate engages with the outer arc side of the oblique thorn block, and one end of the side pull plate engages with the inner arc side of the oblique thorn block.

[0011] Preferably, the top of the fixing ring is provided with at least one clamping structure, the clamping structure includes two limiting slide plates that slide relative to the fixing ring, an elastic rope connects the two limiting slide plates, a magnetically attracted metal is embedded in one side of the limiting slide plate, and a second magnetic block is provided on the other side of the elastic rope that slides relative to the fixing ring.

[0012] Preferably, the outer periphery of the fixing ring is provided with an annular sleeve, the annular sleeve is filled with multiple clamps, and the side wall of the annular sleeve is provided with a clamping structure.

[0013] Preferably, the clamp includes an arc plate, and the arc plate and the annular sleeve are connected by a concave-convex interlocking mechanism to achieve limited sliding. The arc plate is provided with an elastic segment, and a side clamp is connected to one side of the arc plate. The side clamp has a clamping tooth integrally formed on one side.

[0014] Preferably, the conveying clamp structure includes a flexible strip that slides on the side wall of the annular sleeve. One side of the flexible strip is connected to a plurality of equidistantly arranged reverse teeth. One end of the flexible strip passes through the annular sleeve and is connected to an annular plate. A rubber ring to increase resistance is fixed on the outer periphery of the annular plate.

[0015] Preferably, the conveying clamp structure further includes a sliding seat, one end of the conductor is a rigid rod, the sliding seat slides with the conductor in a limiting manner, a third magnetic block is provided on one side of the sliding seat, and a puller is provided on one side of the sliding seat.

[0016] Preferably, the pull member includes a fixed plate fixed to the sliding seat, a shift plate is rotatably connected to one end of the fixed plate, and a rotation limiting plate is fixed to the bottom of the fixed plate to restrict the direction of rotation.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This invention achieves automated clamping of the closed clamp through a closed magnetic suction structure. The magnetic force control of the first magnetic suction block can precisely adjust the clamping force, avoiding tissue tearing or excessive compression caused by uneven force in traditional manual operation. Combined with the pressure bar section (with concave-convex needle-like shape) of the micro-adjustment structure, it can stably move the polyp tissue inward and tightly clamp it, ensuring uniform force on the wound surface during cutting and reducing the risk of gastrointestinal wall perforation caused by uncontrolled cutting depth. In addition, the elastic tension section and tension / compression section can adaptively adjust with tissue deformation, avoiding damage to surrounding normal tissue caused by rigid clamping, significantly reducing the incidence of serious complications such as postoperative enterocutaneous fistula, and solving the technical pain points of high perforation risk and the need for multiple cuts in traditional surgery.

[0019] 2. This invention also controls the magnetic attraction force of the first magnetic block to slightly open the closed clamp. The cooperation between the side pull plate and the oblique thorn block drives the pressure thorn section to pull the polyp inward. The side pressure plate and the constraint sleeve ensure the stability of the position after fine adjustment. The limiting slide plate of the clamping structure further constrains the slight opening amplitude and avoids fine adjustment deviation caused by unstable magnetic control. This design can achieve full clamping of polyp tissue through multiple precise fine adjustments, ensuring complete removal of large-diameter broad-based polyps in one operation without the need for multiple cuts, shortening the operation time, reducing residual lesions and the risk of secondary surgery, and solving the problem of insufficient completeness of traditional instruments.

[0020] 3. This invention also employs a flexible guide wire combined with a miniaturized structural design. The sizes of the fixing ring, closing clip, and annular sleeve are adapted to the narrow endoscopic channel, allowing for smooth access to complex anatomical sites such as the gastrointestinal tract. The flexibility of the guide wire ensures flexible turning within the curved digestive tract, and the stable support of the distal rigid rod enables precise positioning. Compared to the shortcomings of traditional laparoscopic closing devices that are too large, this device can directly reach the lesion location through the endoscopic channel, with a more sensitive operational response. It is especially suitable for polyp removal in deep digestive tracts such as the colon and duodenum, solving the problems of limited adaptability and insufficient operational flexibility of existing instruments.

[0021] 4. This invention also achieves automated delivery of the clamps within the annular clip after polyp removal via a clamp delivery structure: the third magnetic block drives the sliding seat, which, through the engagement of the puller and the reverse teeth of the soft strip, precisely pushes the clamps in a charged state to the wound surface. After the clamps are pushed out, the elastic segment automatically recovers, and the clamp teeth of the side clamps quickly bite the wound surface, achieving immediate closure. The resistance positioning of the rubber ring and the elastic reset design of the sliding seat support multiple continuous clamp delivery, meeting the segmented closure requirements of larger wounds, effectively reducing the risk of postoperative bleeding, and solving the problems of cumbersome operation and insufficient closure timeliness of traditional closure devices.

[0022] 5. This invention also achieves magnetic linkage through the button operation of the control switch, eliminating the need for complex mechanical transmission: the first magnetic block controls the clamping of the closing clamp, the second magnetic block drives the clamping structure to limit the position, and the third magnetic block completes the automatic clamping. The coordinated actions of each action greatly reduce the operational difficulty for medical staff. The elastic reset components (spring tension plate, elastic rope, etc.) realize the automatic return of the structure, reducing manual reset steps; the multiple fine-tuning and continuous clamping functions avoid the frequent entry and exit of instruments into the endoscope channel, significantly shortening the operation time. This design makes the surgical procedure simpler and more efficient, especially suitable for the rapid response needs in high-difficulty endoscopic surgery, improving clinical treatment efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 Enlarged view of the structure at point A in the middle;

[0025] Figure 3 This is a schematic diagram of the structure when the annular sleeve is removed at the end position in this invention;

[0026] Figure 4 This is a schematic diagram of the connection structure between the closed magnetic attraction structure and the fixing ring in this invention;

[0027] Figure 5 This is a schematic diagram of the single-sided fine-tuning structure and constraint component in this invention;

[0028] Figure 6This is a schematic diagram of the fine-tuning structure in this invention;

[0029] Figure 7 For the present invention Figure 5 Enlarged view of the structure at point B;

[0030] Figure 8 For the present invention Figure 5 Enlarged view of the structure at point C;

[0031] Figure 9 This is a schematic diagram of the clamping structure constrained by the clamping mechanism in this invention.

[0032] Figure 10 This is a schematic diagram of the internal structure of the constraint closure clamp in this invention;

[0033] Figure 11 This is a schematic diagram of the partially cut-open annular jacket structure in this invention;

[0034] Figure 12 This is a schematic diagram of the clip structure in this invention;

[0035] Figure 13 This is a schematic diagram of the structure of the annular jacket when it is partially cut open to remove the clip in this invention;

[0036] Figure 14 This is a schematic diagram of the annular jacket structure in this invention;

[0037] Figure 15 This is a schematic diagram of the conveyor clamp structure in this invention;

[0038] Figure 16 This is a schematic diagram of the connection structure of the pull-pull component in this invention.

[0039] Explanation of the labels in the diagram:

[0040] 1. Conductor body; 2. Fixing ring; 3. Rotating block; 4. Closing clamp; 5. Closed magnetic attraction structure; 501. Spring sheet; 502. First magnetic attraction block; 6. Fine-tuning structure; 7. Constraint component; 8. Clamping structure; 9. Annular sleeve; 10. Clip; 11. Clip delivery structure; 81. Control switch;

[0041] 601. Pressing section; 6011. Tensioning section; 6012. Pressing section; 602. Bending plate; 603. Tensioning section; 6031. Slanted spur block; 701. Side guide plate; 702. Extension plate; 703. Constraint sleeve; 704. Side pulling plate; 705. Side pressure plate; 801. Limiting slide plate; 802. Elastic rope; 803. Second magnetic block; 101. Arc plate; 102. Elastic section; 103. Side clamp; 111. Soft strip; 112. Reverse tooth; 113. Ring plate; 114. Sliding seat; 115. Third magnetic block; 116. Pulling component; 1161. Fixing plate; 1162. Moving plate; 1163. Limiting rotation plate. Detailed Implementation

[0042] like Figures 1 to 16 As shown, the present invention relates to a linear cutting and closing device for endoscopic polyp removal, comprising a lead wire 1, the lead wire 1 having a certain degree of flexibility, a fixing ring 2 fixed at one end of the lead wire 1, two symmetrical rotating blocks 3 rotatably connected to the inner circumference of the fixing ring 2, a closing clamp 4 connected to one side of the rotating blocks 3, a closing magnetic attraction structure 5 provided between the two rotating blocks 3, a control switch 81 connected to the other end of the lead wire 1, the control switch 81 being provided with a control button, the closing magnetic attraction structure 5 being composed of a spring sheet 501 and two first magnetic attraction blocks 502, the first magnetic attraction blocks 502 being embedded in one side of the rotating blocks 3, the first magnetic attraction blocks 502 being connected to the control switch 81 and controlled by the control button, the spring sheet 501 being in an arc shape, the spring sheet 501 being made of elastic material, and one side of the spring sheet 501 being fixed to the outer circumference of the rotating blocks 3.

[0043] Working principle: The lead wire 1, with its own flexibility, can adapt to the complex anatomical structure of the digestive tract, making it easy to operate deep into the lesion site inside the body; the inner circumference of the fixed ring 2 fixed at one end, the two symmetrical rotating blocks 3 are in a non-magnetic state, the closed clip 4 connected to one side of the rotating block 3 is in an open state, in the closed magnetic attraction structure 5, the elastic material curved elastic sheet 501 is fixed to the outer circumference of the rotating block 3, at this time the elastic sheet 501 is in a naturally extended state, storing force for the subsequent opening action.

[0044] When it is necessary to clamp the polyp or wound during the operation, the operator presses the control button on the control switch 81 to activate the closing magnetic suction structure 5. After the two first magnetic suction blocks 502 are energized, they generate a magnetic force that attracts each other. This magnetic force drives the two rotating blocks 3 to rotate synchronously towards the center along the inner circumference of the fixing ring 2. The rotating blocks 3 are linked to the closing clamp 4 to move towards the center. As the rotating blocks 3 continue to rotate, the closing clamp 4 gradually fits the polyp tissue or wound, and finally achieves precise clamping without the need for manual and forceful operation, thus reducing the difficulty of operation.

[0045] Furthermore, during clamping, there may be instances where insufficient clamping occurs, leading to incomplete cutting. To address this, and in order to achieve fine-tuning and avoid multiple cuts, the following structure is designed.

[0046] The closing clamp 4 is equipped with a fine-tuning structure 6, which includes a pressing part 601, a bending plate 602, and a tensioning part 603. The end of the tensioning part 603 passes through the elastic sheet 501 and is rotatably connected to the rotating block 3. The pressing part 601 includes a tensioning section 6011, one end of which is fixed to the side wall of the closing clamp 4. The tensioning section 6011 is made of elastic material and has a wave-shaped structure. A barbed section 6012 extends from one side of the tensioning section 6011. The barbed section 6012 has a concave-convex needle-like shape on one side. The tensioning part 603 is made of elastic material. The upper half of the tensioning part 603 is a semi-circular curved shape. Multiple oblique barbs 6031 are provided on the outer periphery of the tensioning part 603. The two ends of the bending plate 602 are fixed to the tensioning part 603 and the barbed section 6012, respectively. The bending plate 602 is an arc-shaped plate that bends obliquely upward toward the tensioning part 603.

[0047] The fine-tuning structure 6 has a constraint member 7 on one side for constraining the position of the tension section 603. The constraint member 7 includes a side guide plate 701 fixed to the inner wall of the closing clamp 4. The side guide plate 701 is located on one side of the tension section 6011. An extension plate 702 is connected to the bottom end of the side guide plate 701. A constraint sleeve 703 is connected to the bottom of the extension plate 702. The constraint sleeve 703 has a curved sliding groove inside that is adapted to the bending plate 602. The constraint member 7 also includes a side pull plate 704 and a side pressure plate 705. The side pressure plate 705 is an elastic sheet. One end of the side pressure plate 705 engages with the outer arc side of the oblique thorn block 6031, and one end of the side pull plate 704 engages with the inner arc side of the oblique thorn block 6031.

[0048] Working principle: After the closing clamp 4 initially clamps the polyp through the closing magnetic suction structure 5, if there is insufficient clamping or incomplete clamping, the operator can adjust the magnetic force of the first magnetic suction block 502 by controlling the switch 81, so that the closing clamp 4 is in a slightly open state (the magnetic force is weakened, and the spring plate 501 slightly rebounds, causing the closing clamp 4 to open slightly). At this time, the tension and pressure part 603 (elastic material, semi-circular curved shape) of the fine adjustment structure 6 is kept in rotational connection with the rotating block 3. The side pull plate 704 and side pressure plate 705 of the constraint part 7 are respectively engaged with the inner and outer arc sides of the oblique thorn block 6031 on the outer periphery of the tension and pressure part 603. The curved sliding groove of the constraint sleeve 703 is adapted to the bending plate 602, providing trajectory constraint for the fine adjustment action.

[0049] When the clamp 4 is slightly open, the side pull plate 704 exerts an inward pulling force on the oblique thorn block 6031, causing the pulling and pressing part 603 to rotate slightly along the rotation connection point with the rotating block 3. Since the pulling and pressing part 603 is fixed to the bending plate 602, when the pulling and pressing part 603 rotates, it simultaneously pulls the bending plate 602 (an arc-shaped plate that bends obliquely upward toward the pulling and pressing part 603) to slide along the curved groove of the constraint sleeve 703. The bending plate 602 then pulls the pressing section 6012 of the pressing part 601 to move inward toward the inside of the clamp 4. The pressing section 6012 (with concave and convex needle-like shape) contacts the polyp, pulling the polyp part that was not completely clamped inward, realizing precise fine adjustment of the polyp clamping position, and avoiding incomplete cutting in the future due to insufficient clamping.

[0050] During the fine-tuning process, the tensioning section 603 and the stretching section 6011 (elastic wave-shaped structure) are both made of elastic material, which can adapt to the deformation of the micro-tensioning action, ensuring that the pressure bar section 6012 always keeps in contact with the polyp and does not leave the clamping area. At the same time, under the pulling force of the side pull plate 704 and the action of its own arc structure, the oblique bar block 6031 can automatically slide along the engagement surface of the side pull plate 704 and the side pressure plate 705 without forced constraint or jamming, ensuring smooth fine-tuning action and avoiding additional damage to the polyp.

[0051] The operator enhances the magnetic attraction of the first magnetic block 502 by controlling switch 81, causing the closing clamp 4 to close again from a slightly open state. During the closing process, the side pressure plate 705 (elastic sheet) exerts an inward squeezing force on the oblique thorn block 6031, which, together with the side pull plate 704, tightens and engages the oblique thorn block 6031, forming a "pressure-pull" bidirectional fixation, locking the tension and pressure part 603 in the fine-tuned position. At the same time, the constraint sleeve 703 restricts the deviation of the bending plate 602 through the curved sliding groove, ensuring that the tension and pressure part 603 always moves towards the side pressure plate 705 and the side pull plate 704. This ensures that if the sequential fine-tuning is still insufficient, multiple fine-tunings can be performed, ensuring that subsequent cutting can be completed in one go, avoiding the risk of prolonged operation time and tissue damage caused by multiple cuttings.

[0052] Furthermore, the above design mainly achieves fine-tuning by controlling the magnetic attraction force and the degree of opening and closing of the four clamps, but its stability is poor. To address this, the following structure is added.

[0053] The top of the fixed ring 2 is provided with at least one clamping structure 8. The clamping structure 8 includes two limiting slide plates 801 that slide relative to the fixed ring 2. An elastic rope 802 is connected between the two limiting slide plates 801. A metal that can be magnetically attracted is embedded in one side of the limiting slide plate 801. A second magnetic block 803 is provided on the other side of the elastic rope 802 that slides relative to the fixed ring 2. The second magnetic block 803 is connected to the control switch 81.

[0054] Working principle: The two limiting slide plates 801 of the clamp structure 8 are slidably connected to the fixed ring 2. Initially, under the traction of the elastic rope 802 (in its natural extended state), they are located away from the closing clamp 4, which does not affect the normal opening and closing of the closing clamp 4. The magnetically attracted metal embedded in one side of the limiting slide plate 801 is in a non-magnetic state with the second magnetic block 803 (connected to the control switch 81) on the other side of the fixed ring 2.

[0055] The operator activates the second magnetic block 803 via control switch 81, causing it to generate magnetic force. The magnetic force attracts the metal embedded in the limiting slide plate 801, causing the two limiting slide plates 801 to overcome the tension of the elastic rope 802 and slide synchronously towards the closing clamp 4 along the limiting structure of the fixed ring 2. As the limiting slide plates 801 continue to slide, they eventually move to the bottom side of the closing clamp 4 and make contact with it. At this time, the limiting slide plates 801 form a physical barrier, limiting the opening range of the closing clamp 4. Even if the magnetic attraction force is adjusted by the first magnetic block 502 to make the closing clamp 4 enter a slightly open state, its opening degree is firmly constrained by the limiting slide plates 801 and cannot be over-opened.

[0056] Furthermore, in order to close the wound after cutting, the following structure is designed.

[0057] A ring-shaped sleeve 9 is provided on the outer periphery of the fixed ring 2. The ring-shaped sleeve 9 is filled with multiple clips 10. Each clip 10 includes an arc plate 101. The arc plate 101 and the ring-shaped sleeve 9 are connected by a convex-concave interlocking mechanism to achieve limited sliding. An elastic segment 102 with elasticity is provided on the arc plate 101. A side clip 103 is connected to one side of the arc plate 101. One side of the side clip 103 is integrally formed with clamping teeth. The clips 10 here are generally the same as those in the existing ones. They are all pre-cast into a shape. When they are inserted into the ring-shaped sleeve 9, they are in an elastic storage state. When they are pushed out, they are elastically restored and clamp and close the wound.

[0058] The annular sleeve 9 has a clamping structure 11 on its side wall. The clamping structure 11 includes a soft strip 111, which slides on the side wall of the annular sleeve 9. A plurality of equidistantly arranged reverse teeth 112 are connected to one side of the soft strip 111. One end of the soft strip 111 passes through the annular sleeve 9 and is connected to a ring plate 113. A rubber ring to increase resistance is fixed on the outer periphery of the ring plate 113.

[0059] The clamping structure 11 also includes a sliding seat 114. One end of the wire body 1 is a rigid rod. The sliding seat 114 slides with the wire body 1 in a limited manner. A third magnetic block 115 is provided on one side of the sliding seat 114. The side of the sliding seat 114 away from the third magnetic block 115 can be elastically engaged to reset it. This design is relatively conventional and has been described above, so it will not be described again. A pull member 116 is provided on one side of the sliding seat 114. The pull member 116 includes a fixed plate 1161 fixed to the sliding seat 114. One end of the fixed plate 1161 is rotatably connected to a shifting plate 1162. A rotation limiting plate 1163 is fixed at the bottom of the fixed plate 1161 to limit the direction of rotation.

[0060] The multiple clips 10 inside the annular jacket 9 are limited and slidable by the interlocking of the arc plate 101 with the jacket, and are in an elastic storage state when installed (the elastic segment 102 deforms to store energy).

[0061] Working principle: When the polyp is cut and the wound needs to be closed, the operator activates the third magnetic block 115 through the control switch 81. The magnetic attraction drives the sliding seat 114 to slide along the rigid rod of the guide body 1 towards the annular sleeve 9. The sliding seat 114 simultaneously drives the puller 116 to move. The shifting plate 1162 at one end of the fixed plate 1161 contacts the reverse teeth 112 of the soft strip 111. Because the rotation limiting plate 1163 restricts the unidirectional rotation of the shifting plate 1162, the shifting plate 1162 pushes the reverse teeth 112 to drive the soft strip 111 to slide along the side wall of the annular sleeve 9. When the soft strip 111 slides, the reverse teeth 112 are adapted to the sleeve without twisting, stably pushing the clamp 10 in the annular sleeve 9 to move towards the outlet direction, realizing the orderly delivery of the clamp 10.

[0062] As the soft strip 111 continues to push, the outermost clamp 10 is pushed out from the outlet of the annular clamp 9. After being freed from the clamp constraint, the elastic segment 102 that was originally storing force is restored to its elasticity, which drives the arc plate 101 to rotate, thereby causing the side clamp 103 (with clamping teeth) to close towards the wound. The clamping teeth bite the wound tissue, completing the wound clamping closure.

[0063] After a single clamping operation is completed, the third magnetic block 115 is closed. The sliding seat 114 slides in the opposite direction along the guide body 1 under the elastic reset action, and the puller 116 returns to its original position. The shifting plate 1162 is restricted from rotating in the opposite direction due to the limited rotation plate 1163, and disengages from the gap of the reverse teeth 112 (without causing the soft strip 111 to retract). At the same time, the rubber ring on the outer periphery of the ring plate 113 generates frictional resistance with the annular clip 9, fixing the position of the soft strip 111 and preventing the clip 10 from retracting. If clamping is required again, the third magnetic block 115 is restarted, and the sliding seat 114 drives the puller 116 to repeat the process of "pushing the reverse teeth 112 - delivering the soft strip 111 - pushing out the clip 10", realizing multiple continuous clamping operations without the need for frequent reloading of the clip 10, thus improving surgical efficiency.

[0064] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. An endoscopic polypectomy linear cutting and closing device, characterized in that, The utility model provides a kind of wire body (1), the wire body (1) one end is fixed with fixed ring (2), the fixed ring (2) inner periphery rotationally connected with two symmetrical rotating blocks (3), the rotating block (3) one side is connected with closed clamp (4), two the rotating block (3) between being equipped with closed magnetic attraction structure (5), the wire body (1) other end is connected with control switch (81), the control switch (81) is provided with control button on it; The closed magnetic attraction structure (5) is composed of a spring sheet (501) and two first magnetic attraction blocks (502), the first magnetic attraction blocks (502) are embedded on one side of the rotating blocks (3), the first magnetic attraction blocks (502) are connected with the control switch (81) and controlled by the control button, the spring sheet (501) is in a curved arc shape, the spring sheet (501) is made of elastic material, and one side of the spring sheet (501) is fixed to the outer periphery of the rotating blocks (3). The closed clamp (4) is provided with a fine adjustment structure (6) inside, the fine adjustment structure (6) includes a pressing part (601), a curved plate (602) and a tensioning part (603), the tensioning part (603) passes through the spring sheet (501) at the end and is rotationally connected with the rotating block (3), and one side of the fine adjustment structure (6) is provided with a restraint member (7) for restraining the position of the tensioning part (603).

2. The linear cutting and stapling device for endoscopic polypectomy according to claim 1, wherein The pressing part (601) includes a tensioning section (6011), one end of the tensioning section (6011) is fixed to the side wall of the closed clamp (4), the tensioning section (6011) is made of elastic material and has a wave shape structure, and one side of the tensioning section (6011) extends a pressing section (6012), and one side of the pressing section (6012) is provided with a concave-convex needle shape.

3. An endoscopic polypectomy snare according to claim 2, wherein the distal end of the snare wire is provided with a cutting edge. The tensioning part (603) is made of elastic material as a whole, the upper half of the tensioning part (603) is in a curved arc shape of a large semicircle, a plurality of inclined prongs (6031) are arranged on the outer periphery of the tensioning part (603), the curved plate (602) is fixed to the tensioning part (603) and the pressing section (6012) at both ends, and the curved plate (602) is an arc-shaped plate curved in an obliquely upward direction of the tensioning part (603).

4. The linear cutting and stapling device for endoscopic polypectomy according to claim 3, wherein The restraint member (7) includes a side guide plate (701) fixed to the inner wall of the closed clamp (4), the side guide plate (701) is located on one side of the tensioning section (6011), the bottom end of the side guide plate (701) is connected with an extension plate (702), the bottom of the extension plate (702) is connected with a restraint sleeve (703), the restraint sleeve (703) is internally provided with a curved sliding groove matched with the curved plate (602), and the restraint member (7) further includes a side tensioning plate (704) and a side pressing plate (705), the side pressing plate (705) is a sheet body with elasticity, one end of the side pressing plate (705) is engaged with the arc side of the outer inclined prong (6031), and one end of the side tensioning plate (704) is engaged with the arc side of the inner inclined prong (6031).

5. An endoscopic polypectomy strip-off device according to claim 4, wherein The fixed ring (2) is provided with at least one about clamping structure (8) on the top, the about clamping structure (8) comprises two limiting sliding plates (801) which are limited to slide with the fixed ring (2), the two limiting sliding plates (801) are connected with elastic ropes (802), the limiting sliding plate (801) is embedded with metal which can be magnetized on one side, and the other side of the elastic rope (802) is provided with a second magnetic block (803).

6. The linear cutting and closing device for endoscopic polypectomy according to claim 4 or 5, characterized in that The fixed ring (2) is provided with an annular clamping sleeve (9) on the outer periphery, the annular clamping sleeve (9) is filled with a plurality of clamps (10) inside, and the side wall of the annular clamping sleeve (9) is provided with a conveying clamping structure (11).

7. An endoscopic polypectomy strip-off device according to claim 6, wherein The clamp (10) comprises an arc plate (101), the arc plate (101) is limited to slide through concave-convex clamping between the annular clamping sleeve (9), the arc plate (101) is provided with an elastic section (102) with elasticity, the arc plate (101) is connected with a side clamp (103) on one side, and the side clamp (103) is integrally formed with a clamping tooth on one side.

8. The linear cutting and stapling device for endoscopic polypectomy according to claim 7, wherein The conveying clamping structure (11) comprises a soft strip (111), the soft strip (111) slides on the side wall of the annular clamping sleeve (9), a plurality of equidistantly arranged reverse teeth (112) are connected on one side of the soft strip (111), the soft strip (111) penetrates through the annular clamping sleeve (9) and is connected with a ring plate (113) on one end, and the ring plate (113) is fixed with a rubber ring which increases resistance on the outer periphery.

9. The linear cutting and stapling device for endoscopic polypectomy according to claim 8, wherein The conveying clamping structure (11) further comprises a sliding seat (114), one end of the wire body (1) is a hard rod part, the sliding seat (114) is limited to slide with the wire body (1), a third magnetic block (115) is arranged on one side of the sliding seat (114), and a pulling member (116) is arranged on one side of the sliding seat (114).

10. The linear cutting stapling device for endoscopic polypectomy according to claim 9, wherein The pulling member (116) comprises a fixed plate (1161) which is fixed with the sliding seat (114), a shifting plate (1162) is rotatably connected to one end of the fixed plate (1161), and a rotation limiting plate (1163) which limits rotation is fixed to the bottom of the fixed plate (1161).

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