An endoscopic mucosal dissection specimen sampling device

Abstract

The application discloses an endoscopic mucosal dissection sample taking device, and relates to the technical field of medical sampling equipment, which comprises a base, a cutter seat and a guide mechanism. The cutter seat comprises a cutter holder and a plurality of cutter blades arranged on the cutter holder. One side of the cutter holder is pivoted relative to the base to enable the cutter seat to be in a cutting state in which the cutter blades are perpendicular to the base. The guide mechanism is connected to the base and the cutter seat in a guided manner. The guide mechanism is configured to vertically guide the cutter blades to enable the cutter blades to vertically approach pathological samples on the base for cutting. The cutter blades comprise first ends and second ends. The first ends are pivotally connected to the cutter holder. The second ends can rotate relative to the cutter holder about the pivot axis of the first ends. The cutter holder is provided with a locking and unlocking piece for locking or unlocking the cutter blades. In the application, the locking and unlocking piece is used to unlock or lock the cutter blades, so that the pathological samples can be synchronously cut, and the cut tissue slices can be sampled one by one.

Description

Technical Field

[0001] This utility model relates to the technical field of medical sampling equipment, specifically to a specimen collection device for endoscopic mucosal dissection that facilitates sampling. Background Technology

[0002] Endoscopic submucosal dissection (ESD) is a minimally invasive technique that completely removes diseased mucosa from the submucosa under endoscopic guidance. This technique is primarily used for the diagnosis and treatment of early-stage gastrointestinal tumors, offering the advantage of complete resection of a certain area of ​​superficial lesions in a single procedure. With the rapid development of minimally invasive surgery and precision medicine, ESD has also seen rapid advancements, holding significant clinical importance for the diagnosis and treatment of early-stage esophageal cancer, early-stage gastric cancer, stromal tumors, and early-stage colon tumors. The quality of ESD specimen pathological examination has a decisive impact on the accuracy of the diagnosis of these lesions. After the ESD specimen is sent to the pathology department, the pathologist must perform tissue sampling examination on all specimens. The sampling requirement is to cut the tissue parallel to each other at 3mm intervals. The quality of the sample taken has a significant impact on the accuracy of the pathological diagnosis of the ESD specimen.

[0003] A specimen collection device for endoscopic mucosal dissection, disclosed in patent publication number CN215953012U, can ensure "parallel cutting of tissue at 3mm intervals". However, because the two blades are only 3mm apart, after the entire row of blades cuts the tissue, the tissue becomes stuck between the blades and is difficult to remove. Utility Model Content

[0004] Therefore, in order to solve the above problems, this utility model provides a specimen collection device for endoscopic mucosal dissection that facilitates sampling.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: An easy-to-use endoscopic mucosal dissection specimen collection device includes: The base, used to hold pathological specimens, The tool holder includes a tool post and a plurality of blades arranged on the tool post. The plurality of blades are evenly and parallelly spaced apart, with a spacing of 3 mm between two adjacent blades. One side of the tool post pivots relative to the base so that the tool holder is in a cutting state in which the blades are perpendicular to the base. A guiding mechanism guides the connection between the base and the blade holder; the guiding mechanism is configured to vertically guide the blade so that the blade is perpendicularly close to the pathological specimen located on the base. The blade includes a first end and a second end. The first end is pivotally connected to the tool holder, and the second end is rotatable relative to the tool holder about the pivot axis of the first end. The tool holder is provided with a locking / unlocking element for locking or unlocking the position of the blade relative to the tool holder.

[0006] Optionally, the locking / unlocking component includes a connecting shaft detachably connected to the tool holder, and a through hole is provided at the second end of the blade. The connecting shaft is configured to be movably inserted into or disengaged from the through hole of the blade along its own axial direction to lock or unlock the position of the blade relative to the tool holder.

[0007] Optionally, the tool holder is provided with mounting posts on both sides along the axial direction of the connecting shaft. The mounting posts are provided with mounting holes perpendicular to their own axial direction. The connecting shaft is movably inserted through the mounting holes of the two mounting posts along its own axial direction. The mounting posts are detachably equipped with limiting members for restricting the movement of the connecting shaft.

[0008] Optionally, the limiting member includes a limiting rod, the top of the mounting post has an axially extending insertion hole extending to the mounting hole, the connecting shaft has a limiting hole perpendicular to its own axial direction, the limiting rod is detachably fixedly inserted into the insertion hole, and the end of the limiting rod can be inserted into the limiting hole to restrict the movement of the connecting shaft.

[0009] Optionally, the limiting rod is threadedly connected to the insertion hole.

[0010] Optionally, an extension rod is provided at the upper end of the limiting rod, and the extension rod and the limiting rod are at an angle.

[0011] Optionally, a first clamping block is provided at the first end of the blade, and a second clamping block is provided at the second end of the blade. The first clamping block is pivotally connected to the blade holder, and the through hole is formed in the second clamping block.

[0012] Optionally, the tool holder includes a first connecting rod and a second connecting rod that are parallel to each other and spaced apart. The first clamping block is pivotally connected to the first connecting rod, and the second clamping block is configured such that when the connecting shaft is disengaged from the second clamping block, the second clamping block partially overlaps the upper surface of the second connecting rod.

[0013] Optionally, the guiding mechanism includes a first guiding component and a second guiding component, the blade holder includes a first connecting rod and a second connecting rod arranged parallel to each other, the first end of the blade is pivotally connected to the first connecting rod, and the second end of the blade can be connected to or disengaged from the second connecting rod through the locking and unlocking member; the first guiding component acts on the first connecting rod, the second guiding component acts on the second connecting rod, and the blade holder is configured such that when the blade holder is in a cutting state, the first guiding component and the second guiding component vertically guide the blade.

[0014] Optionally, two sets of the first guide assembly are provided, respectively arranged at both ends of the first connecting rod along its length. The first guide assembly includes a first guide post, a first guide sleeve, and a first elastic element. The first guide post is fixedly connected to the base. The first guide sleeve is slidably sleeved on the first guide post along its axial direction. The first elastic element acts between the first guide sleeve and the first guide post to provide a restoring force to the first guide sleeve. The ends of the first connecting rod are rotatably connected to the first guide sleeve. And / or, the second guide assembly is provided in two sets, respectively arranged at both ends of the second connecting rod along its length. The second guide assembly includes a second guide post, a second guide sleeve, and a second elastic element. The second guide post is fixedly connected to the lower end face of the second connecting rod. The second guide post includes a limiting part and a guiding part. The second elastic element is sleeved on the guiding part and connected to the limiting part. The second guide sleeve is fixedly connected to the base. The second guide sleeve includes a guiding section and a flared section. The guiding part can be slidably inserted into the guiding section. The second elastic element can act between the limiting part and the flared section to provide a restoring force to the second guide post.

[0015] The technical solution provided by this utility model has the following beneficial effects: the locking and unlocking components lock all the blades on the blade holder to form a whole, thereby enabling synchronous cutting of pathological tissues and cutting the pathological tissues into multiple parallel tissue slices with a thickness of 3mm; when the locking and unlocking components unlock the blades, each blade can rotate relatively independently, so that during sampling, the blades can be rotated sequentially to detach from the tissue slices, thereby sampling each fully exposed tissue slice one by one and avoiding interference from adjacent blades. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this embodiment; Figure 2 This is an exploded view of the tool holder and locking / unlocking components in this embodiment; Figure 3 This is an exploded view of the base, tool holder, and guide mechanism in this embodiment; Figure 4 This is a partial exploded view of the second guide component in this embodiment; Figure 5 This is a diagram showing the state of the tool holder when it is flipped upwards in this embodiment; Figure 6 This is a diagram showing the state of a single blade flipping during sampling in this embodiment.

[0017] Explanation of reference numerals in the attached drawings: 1. Base; 11. Base plate; 111. Support area; 12. Enclosure plate; 2. Tool holder; 21. Tool post; 211. First connecting rod; 212. Second connecting rod; 213. Third connecting rod; 214. Mounting post; 2141. Mounting hole; 2142. Insertion hole; 215. Limiting element; 2151. Limiting rod; 2152. Extension rod; 22. Blade; 221. First end; 2211. First clamping block; 222. Second end; 2221 1. Second clamping block; 2222. Through hole; 3. Guide mechanism; 31. First guide assembly; 311. First guide post; 312. First guide sleeve; 313. First elastic element; 32. Second guide assembly; 321. Second guide post; 3211. Limiting part; 3212. Guide part; 322. Second guide sleeve; 3221. Guide section; 3222. Flared section; 323. Second elastic element; 4. Locking and unlocking part; 41. Connecting shaft; 411. Limiting hole. Detailed Implementation

[0018] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0019] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0020] Reference Figure 1-6This embodiment provides an endoscopic mucosal dissection specimen collection device for easy sampling, including a base 1, a blade holder 2, and a guide mechanism 3. The base 1 is used to hold pathological specimens. The base 1 includes a bottom plate 11 and a surrounding plate 12, with the surrounding plate 12 arranged around the bottom plate 11. The bottom plate 11 has a rectangular support area 111 for placing the pathological specimen. The blade holder 2 includes a blade holder 21 and multiple blades 22 arranged on the blade holder 21. The multiple blades 22 are evenly and parallelly spaced, with a spacing of 3 mm between adjacent blades 22 to ensure that the thickness of the pathological specimen after cutting is 3 mm. One side of the blade holder 21 pivots relative to the base 1 to allow the blade holder 2 to be in a cutting state where the blades 22 are perpendicular to the base 1. The guide mechanism 3 guides and connects the base 1 and the blade holder 2. The guide mechanism 3 is configured to vertically guide the blades 22 so that the blades 22 are perpendicularly close to the pathological specimen located on the base 1 for cutting.

[0021] The blade 22 includes a first end 221 and a second end 222. The first end 221 is pivotally connected to the blade holder 21, and the second end 222 can rotate relative to the blade holder 21 about the pivot axis of the first end 221. The blade holder 21 is provided with a locking / unlocking member 4 for locking or unlocking the position of the blade 22 relative to the blade holder 21. Through the pivotal connection of the blade 22 relative to the blade holder 21, when the locking / unlocking member 4 locks the blade 22, all the blades 22 are locked on the blade holder 21 to form a whole, thereby enabling synchronous cutting of pathological tissue, cutting the pathological tissue into multiple parallel tissue slices with a thickness of 3mm; when the locking / unlocking member 4 unlocks the blades 22, each blade 22 can rotate relatively independently, so that during sampling, the blades 22 can be rotated sequentially to detach from the tissue slice, thereby sampling each fully exposed tissue slice one by one, avoiding interference from adjacent blades 22.

[0022] Furthermore, refer to Figure 2The locking / unlocking component 4 includes a connecting shaft 41. The connecting shaft 41 is detachably connected to the blade holder 21. When the connecting shaft 41 is mounted on the blade holder 21, its axial direction is perpendicular to the length direction of the blade 22. The second end 222 of the blade 22 is provided with a through hole 2222. The connecting shaft 41 is configured to be movably inserted into or disengaged from the through hole 2222 of the blade 22 along its own axial direction to lock or unlock the position of the blade 22 relative to the blade holder 21. By passing the connecting shaft 41 through the through hole 2222 of the second end 222 of all the blades 22, all the blades 22 can be locked on the blade holder 21 to form a whole, thereby facilitating the cutting of pathological tissue. When sampling after cutting, the connecting shaft 41 can be moved along its axial direction, so that the connecting shaft 41 can unlock each blade 22 sequentially from one side, allowing the blades 22 to rotate relatively independently around the pivot axis of the first end 221, thereby facilitating the sampling of tissue sections one by one. In other embodiments, the locking / unlocking component 4 can also be a bolt or other locking component. For example, a bolt can be passed through the second end 222 of the blade 22 and then locked onto the tool holder 21, with each bolt corresponding to one of the blades 22. This can also achieve locking or unlocking of the blade 22 relative to the tool holder 21. However, this method makes the locking or unlocking process of the blade 22 very cumbersome, time-consuming, and inefficient.

[0023] Furthermore, the tool holder 21 is provided with mounting posts 214 on both sides along the axial direction of the connecting shaft 41, and each mounting post 214 has a mounting hole 2141 perpendicular to its own axial direction. The connecting shaft 41 is movably inserted through the mounting holes 2141 of the two mounting posts 214 along its own axial direction. The mounting posts 214 are detachably equipped with limiting members 215 for restricting the movement of the connecting shaft 41. The limiting members 215 ensure a stable connection between the connecting shaft 41 and the mounting posts 214, thereby allowing the connecting shaft 41 to lock all the cutting tools 22 onto the tool holder 21 to form a whole. Moreover, removing the limiting members 215 releases the restriction on the connecting shaft 41, allowing the connecting shaft 41 to move along its own axial direction to unlock all the cutting tools 22.

[0024] Furthermore, the limiting member 215 includes a limiting rod 2151. The top of the mounting post 214 has an axially extending insertion hole 2142 extending to the mounting hole 2141. The connecting shaft 41 has a limiting hole 411 perpendicular to its own axial direction. The limiting rod 2151 is detachably and fixedly inserted into the insertion hole 2142, and the end of the limiting rod 2151 can be inserted into the limiting hole 411 to restrict the movement of the connecting shaft 41. In this embodiment, the limiting rod 2151 and the insertion hole 2142 are threaded together to ensure a stable connection between the limiting rod 2151 and the mounting post 214. An extension rod 2152 is provided at the upper end of the limiting rod 2151. The extension rod 2152 and the limiting rod 2151 are approximately L-shaped to facilitate manual application of force to the extension rod 2152 to rotate the limiting rod 2151. In other embodiments, the limiting rod 2151 and the insertion hole 2142 can also be detachably fixed by an interference fit. However, after frequent disassembly and assembly, the outer wall of the limiting rod 2151 is prone to wear, making the connection between the limiting rod 2151 and the insertion hole 2142 unstable.

[0025] Furthermore, a first clamping block 2211 is provided at the first end 221 of the blade 22, and a second clamping block 2221 is provided at the second end 222 of the blade 22. The first clamping block 2211 is pivotally connected to the tool holder 21, and a through hole 2222 is formed in the second clamping block 2221. The arrangement of the first clamping block 2211 and the second clamping block 2221 facilitates the mounting of the blade 22 on the tool holder 21.

[0026] Furthermore, refer to Figure 1 , 2 6. The tool holder 21 includes a first connecting rod 211 and a second connecting rod 212 that are parallel to each other and spaced apart. A first clamping block 2211 is pivotally connected to the first connecting rod 211. The second clamping block 2221 is configured such that when the connecting shaft 41 disengages from the second clamping block 2221, the second clamping block 2221 partially overlaps the upper surface of the second connecting rod 212. That is, when the connecting shaft 41 unlocks the blade 22, the second clamping block 2221 of the blade 22 partially overlaps the second connecting rod 212, thus preventing it from falling directly into the support area 111 of the base 1. In this embodiment, a third connecting rod 213 is also connected between the first connecting rod 211 and the second connecting rod 212. Two third connecting rods 213 are provided so that the tool holder 21 encloses a rectangular frame structure, and the blade 22 is arranged within the rectangular frame.

[0027] Furthermore, refer to Figure 3 and Figure 5The guiding mechanism 3 includes a first guiding component 31 and a second guiding component 32. The first guiding component 31 acts on the first connecting rod 211, and the second guiding component 32 acts on the second connecting rod 212. The blade holder 2 is configured such that when the blade holder 2 is in the cutting state, the first guiding component 31 and the second guiding component 32 vertically guide the blade 22.

[0028] Specifically, two sets of first guide components 31 are provided, respectively arranged at both ends of the first connecting rod 211 along its length. The first guide component 31 includes a first guide post 311, a first guide sleeve 312, and a first elastic element 313. The first guide post 311 is fixedly connected to the base 1. The first guide sleeve 312 is slidably fitted onto the first guide post 311 along its axial direction. The first elastic element 313 acts between the first guide sleeve 312 and the first guide post 311 to provide a restoring force to the first guide sleeve 312. The two ends of the first connecting rod 211 are rotatably connected to the corresponding first guide sleeve 312. When the blade holder 2 is pressed down to cut the pathological specimen, the first guide sleeve 312 slides downwards along the axial direction of the first guide post 311. After cutting, the blade holder 2 is released, and the first guide sleeve 312 springs upwards under the action of the first elastic element 313, completing its reset. The first elastic element 313 can be a spring or an elastic rubber pad.

[0029] The second guide assembly 32 is also provided in two sets, respectively arranged at both ends of the second connecting rod 212 along its length. The second guide assembly 32 includes a second guide post 321, a second guide sleeve 322, and a second elastic element 323. (Refer to...) Figure 4 The second guide post 321 is fixedly connected to the lower end face of the second connecting rod 212. The second guide post 321 includes a limiting part 3211 and a guiding part 3212. The second elastic member 323 is sleeved on the guiding part 3212 and connected to the limiting part 3211. The second guide sleeve 322 is fixedly connected to the base 1. The second guide sleeve 322 includes a guiding section 3221 and a flared section 3222. The flared section 3222 is arranged facing upward to ensure that when the tool holder 2 is flipped downward to the cutting state, the second guide post 321 and the second elastic member 323 can fall into the flared section 3222. The outer diameter of the limiting part 3211 is larger than the inner diameter of the guiding section 3221. When the tool holder 2 is pressed down vertically, the guiding part 3212 can slide into the guiding section 3221, and the second elastic member 323 can act between the limiting part 3211 and the flared section 3222 so that the second guide post 321 provides a restoring force. The second elastic element 323 can also be a spring, and the outer diameter of the spring is larger than the inner diameter of the guide section 3221.

[0030] Work process: In preparation, the connecting shaft 41 passes through the through hole 2222 of the second clamping block 2221 of all blades 22, and the connecting shaft 41 is limited by the installation post 214 inserted by the limiting rod 2151, so that all blades 22 are locked on the blade holder 21 to form a whole; the blade holder 2 flips upward around the pivot axis of the first connecting rod 211, and the support area 111 of the base plate 11 is exposed, and the pathological specimen is placed in the support area 111.

[0031] During the cutting process, the blade holder 2 rotates downward around the pivot axis of the first connecting rod 211 to the cutting state, that is, the blade 22 on the blade holder 2 is perpendicular to the base plate 11; then the blade holder 2 is pressed down vertically, so that all the blades 22 simultaneously cut the pathological specimen into multiple parallel tissue slices with a thickness of 3mm.

[0032] During sampling, the downward pressure on the blade holder 2 is released. Under the reset action of the first elastic element 313 and the second elastic element 323, the blade 22 springs upward, disengaging from the base plate 11. The limiting rod 2151 releases its restriction on the connecting shaft 41, allowing the connecting shaft 41 to move axially and unlocking all blades 22. Using tweezers, the second clamping block 2221 of any blade 22 is clamped, and the blade 22 is flipped upward, separating it from the tissue slice. This fully exposes the corresponding tissue slice, making it easier to grasp with tweezers. Repeating this process allows for individual sampling of all tissue slices, avoiding interference from adjacent blades 22.

[0033] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A convenient endoscopic mucosal dissection specimen collection device, characterized in that: The base, used to hold pathological specimens, The tool holder includes a tool post and a plurality of blades arranged on the tool post. The plurality of blades are evenly and parallelly spaced apart, with a spacing of 3 mm between two adjacent blades. One side of the tool post pivots relative to the base so that the tool holder is in a cutting state in which the blades are perpendicular to the base. A guiding mechanism guides the connection between the base and the blade holder; the guiding mechanism is configured to vertically guide the blade so that the blade is perpendicularly close to the pathological specimen located on the base. The blade includes a first end and a second end. The first end is pivotally connected to the tool holder, and the second end is rotatable relative to the tool holder about the pivot axis of the first end. The tool holder is provided with a locking / unlocking element for locking or unlocking the position of the blade relative to the tool holder.

2. The endoscopic mucosal dissection specimen collection device for easy sampling according to claim 1, characterized in that: The locking and unlocking mechanism includes a connecting shaft detachably connected to the tool holder. A through hole is provided at the second end of the blade. The connecting shaft is configured to be movably inserted into or disengaged from the through hole of the blade along its own axial direction to lock or unlock the position of the blade relative to the tool holder.

3. The endoscopic mucosal dissection specimen collection device for easy sampling according to claim 2, characterized in that: The tool holder is provided with mounting posts on both sides along the axial direction of the connecting shaft. Each mounting post has a mounting hole perpendicular to its own axial direction. The connecting shaft is movably inserted through the mounting holes of the two mounting posts along its own axial direction. Each mounting post is detachably equipped with a limiting member for restricting the movement of the connecting shaft.

4. The endoscopic mucosal dissection specimen collection device for easy sampling according to claim 3, characterized in that: The limiting component includes a limiting rod. The top of the mounting column has an insertion hole extending to the mounting hole along the axial direction. The connecting shaft has a limiting hole perpendicular to its own axial direction. The limiting rod is detachably fixedly inserted into the insertion hole, and the end of the limiting rod can be inserted into the limiting hole to restrict the movement of the connecting shaft.

5. The endoscopic mucosal dissection specimen collection device for easy sampling according to claim 4, characterized in that: The limiting rod is threadedly connected to the insertion hole.

6. The endoscopic mucosal dissection specimen collection device according to claim 5, characterized in that: An extension rod is provided at the upper end of the limiting rod, and the extension rod forms an angle with the limiting rod.

7. The endoscopic mucosal dissection specimen collection device for easy sampling according to claim 2, characterized in that: The first end of the blade is provided with a first clamping block, and the second end of the blade is provided with a second clamping block. The first clamping block is pivotally connected to the blade holder, and the through hole is formed in the second clamping block.

8. The endoscopic mucosal dissection specimen collection device according to claim 7, characterized in that: The tool holder includes a first connecting rod and a second connecting rod that are parallel to each other and spaced apart. The first clamping block is pivotally connected to the first connecting rod. The second clamping block is configured such that when the connecting shaft is disengaged from the second clamping block, the second clamping block partially overlaps the upper surface of the second connecting rod.

9. The endoscopic mucosal dissection specimen collection device for easy sampling according to claim 1, characterized in that: The guiding mechanism includes a first guiding component and a second guiding component. The blade holder includes a first connecting rod and a second connecting rod arranged parallel to each other. The first end of the blade is pivotally connected to the first connecting rod, and the second end of the blade can be connected to or detached from the second connecting rod through the locking and unlocking member. The first guiding component acts on the first connecting rod, and the second guiding component acts on the second connecting rod. The blade holder is configured such that when the blade holder is in a cutting state, the first guiding component and the second guiding component guide the blade perpendicularly.

10. The endoscopic mucosal dissection specimen collection device according to claim 9, characterized in that: The first guide assembly is provided in two sets, respectively arranged at both ends of the first connecting rod along its length. The first guide assembly includes a first guide post, a first guide sleeve, and a first elastic element. The first guide post is fixedly connected to the base. The first guide sleeve is slidably sleeved on the first guide post along its axial direction. The first elastic element acts between the first guide sleeve and the first guide post to provide a restoring force to the first guide sleeve. The ends of the first connecting rod are rotatably connected to the first guide sleeve. And / or, the second guide assembly is provided in two sets, respectively arranged at both ends of the second connecting rod along its length. The second guide assembly includes a second guide post, a second guide sleeve, and a second elastic element. The second guide post is fixedly connected to the lower end face of the second connecting rod. The second guide post includes a limiting part and a guiding part. The second elastic element is sleeved on the guiding part and connected to the limiting part. The second guide sleeve is fixedly connected to the base. The second guide sleeve includes a guiding section and a flared section. The guiding part can be slidably inserted into the guiding section. The second elastic element can act between the limiting part and the flared section to provide a restoring force to the second guide post.

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