An exchangeable endoscopic hemostatic clip device

Abstract

The application discloses a replaceable endoscope hemostatic clip device and relates to the technical field of medical instruments. The replaceable endoscope hemostatic clip device comprises a release device and a chuck assembly. The release device is reusable, and the chuck assembly is replaceably connected to the distal end of the release device. The release device comprises an outer tube, a push-pull wire and a connecting part. The lower end of the outer tube is fixedly connected with a handle. The push-pull wire is arranged in the outer tube, the lower end of the push-pull wire extends to the outside of the outer tube and can be manually dragged, and the upper end of the push-pull wire is fixedly connected with the connecting part. The chuck assembly comprises a sleeve and a clamping piece. The lower end of the sleeve is detachably fixedly connected with the upper end of the outer tube. The application provides the endoscope hemostatic clip device which has the advantages of simple structure, reliable connection, convenient operation, reusable release device and quick replacement of the clamping piece, and has remarkable clinical value and economic benefits in reducing medical costs, improving operation efficiency and reducing the burden of patients.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a replaceable endoscopic hemostatic clip device. Background Technology

[0002] Endoscopic hemostatic clips are core instruments used for tissue closure and hemostasis in digestive endoscopy. Their principle is to close the wound surface by clamping the clips, using mechanical force to ligate surrounding tissues and bleeding vessels, thereby blocking blood flow and achieving hemostasis. Due to its advantages of minimal trauma, rapid hemostasis, and few complications, endoscopic hemostatic clips have become the most effective and clinically valuable non-surgical treatment for gastrointestinal bleeding.

[0003] However, existing endoscopic hemostatic clips still have many shortcomings in clinical use. Most commercially available products are designed with one clip per lever, and one release device can only be used with one clip. For endoscopic treatments with larger incisions or complex bleeding, a single operation often requires dozens of hemostatic clips, each equipped with a complete handle and release mechanism. This not only results in a large waste of resources but also significantly increases the medical expenses and economic burden on patients.

[0004] To address these issues, some companies have begun developing replaceable technologies aimed at enabling the reuse of release devices and the rapid replacement of clamps. However, existing replaceable solutions are generally complex in structure, with cumbersome connection and disconnection operations between the clamp and the release device. Furthermore, the positioning accuracy decreases significantly after multiple connections, directly affecting the accuracy and reliability of clamping, and failing to meet the clinical demand for efficient and precise hemostasis.

[0005] Furthermore, the clips and release devices of existing hemostatic clips cannot be separated once the connection is completed, and the release device is discarded along with the clip. Even if the concept of interchangeable clips is adopted, the connection structure lacks a standardized interface design, which cannot truly achieve the clinical goal of reusing the release device across multiple clips.

[0006] Therefore, there is an urgent need for a replaceable endoscopic hemostatic clip device that is simple in structure, reliable in connection, convenient in operation, and has a reusable release device. These are the technical problems that those skilled in the art urgently need to solve.

[0007] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0008] To address the aforementioned technical problems, embodiments of the present invention provide a replaceable endoscopic hemostatic clip device to solve the problems mentioned in the background art.

[0009] This invention provides the following technical solution: a replaceable endoscopic hemostatic clip device, comprising: Release device, reusable release device; and A chuck assembly, which can be replacedly connected to the distal end of the releaser; The release device includes an outer tube, a push-pull wire, and a connecting part; The lower end of the outer tube is fixedly connected to the handle; The push-pull wire is located inside the outer tube, with its lower end extending to the outside of the outer tube and can be manually dragged. Its upper end is fixedly connected to the connecting part. The chuck assembly includes a sleeve and a clamp; The lower end of the sleeve is detachably and fixedly connected to the upper end of the outer tube; The clamp includes a U-shaped bent section and two clamping arms connected to the U-shaped bent section, which is inserted into the sleeve; The connecting part can be connected to the bottom of the U-shaped bend section. Manually dragging and pulling the wire can drive the two clamping arms of the clamping plate to penetrate into the sleeve to achieve closure.

[0010] Preferably, the connecting part includes a pull rod and a limiting block fixed to the peripheral wall of the pull rod; The bottom of the U-shaped bend of the clip is provided with a tie rod through hole, and the peripheral wall of the tie rod through hole is provided with a radial clearance groove and a limiting groove adjacent to the clearance groove; After the head of the pull rod and the limiting block pass upward through the pull rod through the hole and the clearance groove respectively, manually rotate the push-pull screw to control the pull rod to rotate through a certain angle, so that the limiting block rotates into the limiting groove.

[0011] Preferably, the wall thickness of the bottom of the relief groove is less than the wall thickness of other areas at the bottom of the U-shaped bend section; when the downward pulling force applied to the connection exceeds the preset threshold, the limiting block presses against the bottom of the relief groove, causing it to undergo plastic deformation, which can cause the limiting block to come out of the limiting groove and slide down along the relief groove.

[0012] Preferably, a fixing sleeve is fixedly connected to the upper end of the outer tube, and a ball fixing sleeve is provided inside the fixing sleeve; Both the ball retainer sleeve and the retainer sleeve have radial holes on their peripheral walls. The balls are placed in the radial holes and held between the ball retainer sleeve and the retainer sleeve. A tapered fixing sleeve is coaxially fixed at the upper end of the push-pull wire and the lower part of the connecting part, and both ends of the tapered fixing sleeve are tapered. The inner wall of the sleeve is provided with a groove that matches the ball bearing; After the upper end of the outer tube is inserted into the lower end of the sleeve, manually push the push-pull wire forward, which can simultaneously drive the tapered fixing sleeve to push the ball into the slot, so as to realize the detachable and fixed connection between the outer tube and the sleeve.

[0013] Preferably, an elastic side piece is formed on one side of the U-shaped bend, and the free end of the elastic side piece extends toward the side away from the U-shaped bend. When the wire is pulled backward, the elastic side plate undergoes elastic deformation, causing the ball to spring out of the slot, releasing the snap-fit ​​and separating the upper end of the outer tube from the lower end of the sleeve.

[0014] Preferably, the clamping piece is integrally formed from an elastic material, and the U-shaped bending section is used to provide elastic restoring force, so that the two clamping arms remain open in the natural state and close when subjected to external constraints.

[0015] Preferably, the clip is made of medical-grade stainless steel or nickel-titanium alloy and integrally formed by stamping or wire cutting, or is made of polymer material and integrally formed by injection molding.

[0016] Preferably, the clip is made entirely of a biodegradable metal material or a biodegradable polymer material.

[0017] The replaceable endoscopic hemostatic clip device provided in this embodiment of the invention has the following beneficial effects: (1) With the detachable connection design of the release device and the clamp assembly, only one release device is needed in one operation to complete multiple clamping operations. This breaks through the traditional one-bar-one-clamp design limitation, greatly reduces the waste of resources of the handle and release mechanism, and effectively reduces the medical expenses and economic burden of patients.

[0018] (2) The connecting part is inserted into the limiting block by rotating the pull rod head through the pull rod through the hole and the clearance groove. The release device and the clamp can be quickly connected by rotating the pull rod in the opposite direction. Applying a predetermined tension will cause plastic deformation at the bottom of the clearance groove, which will enable quick release. The connection structure between the release device and the clamp assembly is simple and reliable, and the operation is convenient and efficient.

[0019] (3) The locking and unlocking mechanism of the outer tube and the sleeve is ingenious; the ball is pushed open by the tapered fixed sleeve to make it snap into the slot to achieve quick locking, and the ball is ejected from the slot by the deformation of the elastic side plate to achieve quick unlocking. The locking state is stable and reliable, and the unlocking process does not require external intervention, which further improves the efficiency of changing.

[0020] (4) The clamp adopts an integral molding structure, which eliminates the risk of loosening and falling off of independent parts such as hinge shafts and pins of split clamps, simplifies the manufacturing and assembly process, reduces production costs and defect rate, and improves the structural strength and long-term clamping reliability of the clamp.

[0021] (5) The clip can be made of biodegradable material and can be gradually degraded and absorbed after the tissue heals. It does not require a second surgery to remove it, thus avoiding the chronic inflammatory reaction caused by long-term retention of metal foreign bodies and the interference of imaging examinations such as CT and MRI, reducing the psychological burden and physical pain of patients. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the structure of the present invention.

[0023] Figure 2 For the present invention Figure 1 A schematic diagram of the cross-sectional structure.

[0024] Figure 3 This is a structural schematic diagram showing the connection angle between the clamp assembly and the release device in this invention.

[0025] Figure 4 This is a schematic diagram of the structure of the clamp assembly and the release device connected at angle two in this invention.

[0026] Figure 5 This is a schematic diagram of the exploded structure of the present invention.

[0027] Figure 6 This is a schematic diagram of the structure after the two clamping arms are combined in this invention.

[0028] Figure 7 For the present invention Figure 2 A magnified view of part A in the image.

[0029] Figure 8 For the present invention Figure 3 A magnified view of part B in the image.

[0030] Figure 9 For the present invention Figure 4 A magnified view of part C. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] See Figures 1-9 .

[0033] To address the problems mentioned in the background section, this invention provides a replaceable endoscopic hemostatic clip device to solve the aforementioned technical problems. The technical solution is as follows: A replaceable endoscopic hemostatic clip device, comprising: Release device, reusable release device; and A chuck assembly, which can be replacedly connected to the distal end of the releaser; The release device includes an outer tube 180, a push-pull wire 190, and a connecting part 130; The lower end of the outer tube 180 is fixedly connected to the handle; the structure of the handle is not shown in the attached drawings. The push-pull wire 190 is located inside the outer tube 180, and its lower end extends to the outside of the outer tube 180 and can be manually dragged. The upper end of the push-pull wire 190 is fixedly connected to the connecting part 130. Push-pull wire 190 is a slender metal component with axial push-pull stiffness, such as steel wire rope, nickel-titanium alloy wire or stranded steel cable. The chuck assembly includes a sleeve 110 and a clamp 120; The sleeve 110 is tubular, and the upper end of the outer tube 180 is detachably and fixedly connected to the lower end of the sleeve 110. The clamp 120 includes a U-shaped bent section 122 and two clamping arms 121 connected to the U-shaped bent section 122. The U-shaped bent section 122 of the clamp 120 is inserted into the sleeve 110. The connecting part 130 can be connected to the bottom of the U-shaped bending section 122. Manually dragging the push-pull wire 190 can drive the two clamping arms 121 of the clamping plate 120 to go deeper into the sleeve 110 to achieve closure.

[0034] In this embodiment, the connecting part 130 includes a pull rod 131 and a limiting block 132 fixed on the peripheral wall of the pull rod 131; The bottom of the U-shaped bend 122 of the clip 120 is provided with a pull rod through hole 124, and the peripheral wall of the pull rod through hole 124 is provided with a radial clearance groove 125 and a limiting groove 126 adjacent to the clearance groove 125. After the head 133 and the limiting block 132 of the pull rod 131 pass through the pull rod through hole 124 and the clearance groove 125 respectively, the push-pull wire 190 is manually rotated to control the pull rod 131 to rotate through a certain angle, so that the limiting block 132 rotates into the limiting groove 126.

[0035] The limiting block engages with the head of the pull rod, and can be quickly connected by rotating it into the limiting groove; rotating it in the opposite direction will release the engagement and allow it to quickly disengage by engaging with the clearance groove.

[0036] In this embodiment, the wall thickness of the bottom of the relief groove 125 is less than the wall thickness of other areas at the bottom of the U-shaped bending section 122. When the downward pulling force applied to the connecting part 130 exceeds the preset threshold, the limiting block 132 presses against the bottom of the relief groove 125, causing it to undergo plastic deformation, which can cause the limiting block 132 to come out of the limiting groove 126 and slide down along the relief groove 125.

[0037] In this embodiment, a fixed sleeve 170 is fixedly connected to the upper end of the outer tube 180, and a ball fixed sleeve 150 is fixedly provided inside the fixed sleeve 170. Both the ball retaining sleeve 150 and the retaining sleeve 170 have radial holes 151 on their peripheral walls. The ball 160 is disposed in the radial hole 151 and is clamped between the ball retaining sleeve 150 and the retaining sleeve 170. A tapered fixing sleeve 140 is coaxially fixed at the upper end of the push-pull wire 190 and below the connecting part 130, and both ends of the tapered fixing sleeve 140 are tapered. The inner wall of the sleeve 110 is provided with a groove 111 that is adapted to the ball 160; After the upper end of the outer tube 180 is inserted into the lower end of the sleeve 110, the push-pull wire is manually pushed forward, which can simultaneously drive the tapered fixing sleeve 140 to push the ball 160 into the slot 111, so as to realize the detachable fixed connection between the outer tube 180 and the sleeve 110.

[0038] In this embodiment, an elastic side piece 123 is formed on one side of the U-shaped bending section 122, and the free end of the elastic side piece 123 extends toward the side away from the U-shaped bending section 122. When the push-pull wire 190 is pulled backward, the elastic side plate 123 undergoes elastic deformation, which causes the ball 160 to be ejected from the slot 111, releasing the snap-fit ​​and causing the upper end of the outer tube 180 to separate from the lower end of the sleeve 110.

[0039] When the tapered retaining sleeve is pushed forward, it opens the ball bearings and causes them to engage in the slot, achieving quick locking between the outer tube and the sleeve; when the elastic side plate is dragged, it deforms and pushes the ball bearings out of the slot, releasing the lock and achieving quick unlocking.

[0040] In this embodiment, the clamp 120 is integrally formed from an elastic material, and the U-shaped bending section 122 is used to provide elastic restoring force so that the two clamp arms 121 remain open in their natural state and close when subjected to external constraints.

[0041] In this embodiment, the clip 120 is made of medical stainless steel or nickel-titanium alloy by stamping or wire cutting, or is made of polymer material by injection molding.

[0042] In this embodiment, the clip 120 is made entirely of a biodegradable metal material or a biodegradable polymer material. Since the clip is made entirely of a biodegradable material, it can gradually degrade and be absorbed after tissue healing, eliminating the need for a second surgery to remove it.

[0043] The operation method of the replaceable endoscopic hemostatic clip device provided in this embodiment of the invention is as follows: (1) In the pre-installed state of the chuck assembly, the U-shaped bend 122 of the clamp 120 is inserted into the sleeve 110, and the two clamp arms 121 remain naturally open under the elastic restoring force of the U-shaped bend 122. The clamp 120 and the sleeve 110 are shipped as a whole assembly, and multiple chuck assemblies can be provided in one package for replacement.

[0044] (2) When assembling the chuck assembly and the release device, first insert the upper end of the outer tube 180 into the lower end of the sleeve 110. Push the handle so that the push-pull wire 190 drives the tapered fixing sleeve 140 to move forward. The tapered end of the tapered fixing sleeve 140 pushes against the ball 160, so that the ball 160 moves outward along the radial hole 151 and is inserted into the slot 111 on the inner wall of the sleeve 110, thereby realizing the detachable fixed connection between the outer tube 180 and the sleeve 110.

[0045] Continue pushing the handle forward, and the push-pull wire 190 drives the connecting part 130 to continue moving forward. The head 133 of the pull rod 131 and the limiting block 132 pass through the pull rod through hole 124 and the clearance groove 125 at the bottom of the clamp 120, respectively. Then, manually rotate the push-pull wire 190 to make the pull rod 131 rotate through a certain angle, and the limiting block 132 rotates into the limiting groove 126. At this point, the connecting part 130 and the clamp 120 are connected, and the clamp assembly and the release device are assembled.

[0046] (3) When performing clamping hemostasis, manually drag the push-pull wire 190 backward. The connecting part 130 drives the clamp 120 to move backward as a whole. The two clamping arms 121 gradually close under the constraint of the cannula 110 wall, clamping the target tissue to achieve hemostasis. When it is necessary to release the tissue, push the push-pull wire 190 forward to move the clamp 120 forward. After the two clamping arms 121 are released from the constraint of the cannula 110, they reopen under the action of elastic restoring force.

[0047] (4) When the chuck assembly needs to be replaced, continue to pull the push-pull wire 190 backward with force. The connecting part 130 drives the clamp 120 to move backward as a whole. The U-shaped bending section 122 of the clamp 120 tightens and is put into the sleeve 110. At this time, the tapered fixing sleeve 140 moves backward, the ball 160 loses the push of the tapered fixing sleeve 140, the elastic side plate 123 undergoes elastic deformation and ejects the ball 160 from the slot 111. The ball 160 returns to the radial hole 151, and the fixed connection between the outer tube 180 and the sleeve 110 is released.

[0048] At this time, the push-pull wire 190 can be manually rotated in the opposite direction to make the pull rod 131 rotate through a certain angle. The limiting block 132 rotates out of the limiting groove 126 and rotates to the position corresponding to the avoidance groove 125. Then, the push-pull wire 190 is dragged backward, and the limiting block 132 slides down along the avoidance groove 125, and the connecting part 130 disengages from the clamp 120.

[0049] Alternatively, by continuing to pull backward with force, the limiting block 132 presses against the bottom of the relief groove 125 and causes it to undergo plastic deformation. The limiting block 132 disengages from the limiting groove 126 and slides down along the relief groove 125, disengaging the connecting part 130 from the clamping piece 120. At this point, the release device and the chuck assembly are completely separated, and the release device can be removed from the body to reload a new chuck assembly for the next operation.

[0050] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0051] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of components or the interaction between components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] It is understood that those skilled in the art can make equivalent substitutions or modifications to the technical solutions and concepts of this invention, and all such substitutions or modifications should fall within the protection scope of the appended claims.

Claims

1. A replaceable endoscopic hemostatic clip device, characterized in that, include: Release device; the release device is reusable. as well as A chuck assembly, which can be replacedly connected to the distal end of the releaser; The release device includes an outer tube, a push-pull wire, and a connecting part; The lower end of the outer tube is fixedly connected to the handle; The push-pull wire is located inside the outer tube, with its lower end extending to the outside of the outer tube and can be manually dragged. Its upper end is fixedly connected to the connecting part. The chuck assembly includes a sleeve and a clamp; The lower end of the sleeve is detachably and fixedly connected to the upper end of the outer tube; The clamp includes a U-shaped bent section and two clamping arms connected to the U-shaped bent section, which is inserted into the sleeve; The connecting part can be connected to the bottom of the U-shaped bend section. Manually dragging and pulling the wire can drive the two clamping arms of the clamping plate to penetrate into the sleeve to achieve closure.

2. The replaceable endoscopic hemostatic clip device according to claim 1, characterized in that, The connecting part includes a pull rod and a limiting block fixed to the peripheral wall of the pull rod; The bottom of the U-shaped bend of the clip is provided with a tie rod through hole, and the peripheral wall of the tie rod through hole is provided with a radial clearance groove and a limiting groove adjacent to the clearance groove; After the head of the pull rod and the limiting block pass upward through the pull rod through the hole and the clearance groove respectively, manually rotate the push-pull screw to control the pull rod to rotate through a certain angle, so that the limiting block rotates into the limiting groove.

3. The replaceable endoscopic hemostatic clip device according to claim 2, characterized in that, The wall thickness at the bottom of the clearance groove is less than the wall thickness of other areas at the bottom of the U-shaped bend section; When the downward force applied to the connection exceeds the preset threshold, the limiting block presses against the bottom of the relief groove, causing it to undergo plastic deformation, which can cause the limiting block to come out of the limiting groove and slide down along the relief groove.

4. The replaceable endoscopic hemostatic clip device according to claim 1, characterized in that, A fixed sleeve is fixedly connected to the upper end of the outer tube, and a ball bearing fixed sleeve is provided inside the fixed sleeve. Both the ball retainer sleeve and the retainer sleeve have radial holes on their peripheral walls. The balls are placed in the radial holes and held between the ball retainer sleeve and the retainer sleeve. A tapered fixing sleeve is coaxially fixed at the upper end of the push-pull wire and the lower part of the connecting part, and both ends of the tapered fixing sleeve are tapered. The inner wall of the sleeve is provided with a groove that matches the ball bearing; After the upper end of the outer tube is inserted into the lower end of the sleeve, manually push the push-pull wire forward, which can simultaneously drive the tapered fixing sleeve to push the ball into the slot, so as to realize the detachable and fixed connection between the outer tube and the sleeve.

5. The replaceable endoscopic hemostatic clip device according to claim 1, characterized in that, One side of the U-shaped bend section is formed with an elastic side piece, and the free end of the elastic side piece extends away from the side of the U-shaped bend section. When the wire is pulled backward, the elastic side plate undergoes elastic deformation, causing the ball to spring out of the slot, releasing the snap-fit ​​and separating the upper end of the outer tube from the lower end of the sleeve.

6. The replaceable endoscopic hemostatic clip device according to claim 1, characterized in that, The clamps are integrally molded from elastic material, and the U-shaped bend section is used to provide elastic restoring force, so that the two clamps remain open in their natural state and close when subjected to external constraints.

7. The replaceable endoscopic hemostatic clip device according to claim 1, characterized in that, The clips are made of medical-grade stainless steel or nickel-titanium alloy through stamping or wire cutting, or are made of polymer materials through injection molding.

8. The replaceable endoscopic hemostatic clip device according to claim 7, characterized in that, The clip is made entirely of biodegradable metal or biodegradable polymer materials.

Images