Specimen taking device for endoscopic endoscope

Abstract

The invention discloses an endoscope specimen fetching device, and relates to the technical field of biomedicine, the endoscope specimen fetching device comprises a pull rod, a catheter and an operating handle, the left side end of the pull rod is provided with a specimen bag, the bag opening of the specimen bag is provided with a supporting ring, and the right side end of the pull rod is fixedly provided with a pull ring; the catheter is a hollow tube, and an intraoperative sealing mechanism is arranged on the left side end face of the catheter and comprises an elastic ring, a clamping hook, a sliding plate, a micro spring, a pull wire and a pulley block. The operating handle comprises a handle body, an intraoperative sealing adjusting assembly and a postoperative sealing mechanism. The middle of the specimen bag can be automatically sealed in an operation, the specimen bag is divided into two independent cavities, the specimen bag can pass through a wound of a patient more easily, tissue specimens in the specimen bag can be prevented from falling out when secondary fetching is needed, an operator does not need to pull the pull rod all the time after the operation is finished, and the burden of the operator is relieved.

Description

Technical Field

[0001] The invention relates to the technical field of biomedicine, in particular to an endoscopic specimen extractor. Background Art

[0002] Endoscopic specimen retriever is a disposable medical device. Its main function is to collect human tissue specimens or foreign bodies and remove them from the body during clinical minimally invasive endoscopic surgery. Common retrievers are mainly composed of a catheter, a pull rod and a specimen bag, in which the mouth of the specimen bag is held open by a support ring made of memory alloy and will automatically open after entering the surgical area (relevant patents include CN201510041308.5 A re-openable specimen retrieval bag).

[0003] When the specimen retriever is in use, the catheter and the pull rod need to be inserted into the puncture device to enter the surgical area (for the unopened specimen retriever, in the initial state, the pull rod and the specimen bag are inserted in the catheter, and the specimen bag is in a contracted state at this time). After entering the surgical area, the pull rod is pushed to push the specimen bag out of the catheter, and the specimen bag automatically opens. After that, the specimen bag can be used to collect various types of resected objects in laparoscopic surgery. If a second specimen retrieval is required during the operation, then after the first specimen retrieval, the pull rod is pulled to pull the support ring at the mouth of the specimen bag into the catheter to temporarily tighten the specimen bag. When the second specimen retrieval is required, the operator pushes the pull rod to reopen the specimen bag to collect the second resected object. In this process, since the specimen bag is already filled with resected objects and the space in the surgical area is limited, the resected objects in the specimen bag are easy to overflow when it is opened. Moreover, if a large number of tissue specimens are collected and the specimen bag is too large, it is difficult to pass through the wound.

[0004] In addition, after the operation, before removing the retriever, in order to prevent the resected material in the specimen bag from falling out and contaminating the abdominal cavity, the operator is required to keep pulling the pull rod to keep the specimen bag in a contracted state. Some retrievers are equipped with pull wires to tighten the specimen bags (relevant patents include CN202023181522.6 A medical disposable specimen retriever). For the latter retriever, when closing the specimen bag, the pull wire must be pulled to tighten the specimen bag. Therefore, both retrievers require the operator to use one hand to tighten the specimen bag. Summary of the invention

[0005] The object of the present invention is to provide an endoscopic specimen extractor to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An endoscopic specimen extractor comprises: a pull rod, a catheter and an operating handle, a specimen bag is arranged at the left end of the pull rod, a support ring is arranged at the bag opening of the specimen bag, and a pull ring is fixedly installed at the right end of the pull rod;

[0008] The catheter is a hollow tube, and a sealing mechanism is provided on the left end surface of the catheter. There are a plurality of sealing mechanisms, which are distributed in a circular array on the left end surface of the catheter.

[0009] The intraoperative sealing mechanism comprises an elastic ring, a hook, a sliding plate, a micro spring, a pull wire and a pulley block;

[0010] The left end surface of the conduit is provided with an annular groove for accommodating an elastic ring, the elastic ring is opened by a hook, the lower part of the annular groove is connected to a limiting groove, the hook is rotatably installed in the limiting groove, and the hook is connected to the sliding plate through a linkage rod;

[0011] The left side of the sliding plate is fixedly connected to the micro spring, the micro spring and the sliding plate are located in the transverse groove, and the transverse groove is connected to the annular groove;

[0012] The left end of the sliding plate is fixedly connected to a pull wire, the pull wire passes through a micro spring, and the pull wire changes direction through a pulley group and passes out of the catheter;

[0013] The operating handle is plugged and fixed with the catheter, and the operating handle comprises a handle body, an intraoperative sealing adjustment component and a postoperative sealing mechanism, and the end of the pull wire is connected to the intraoperative sealing adjustment component.

[0014] As a further solution of the present invention: the hook is rotatably installed in the limiting groove through the central axis;

[0015] The sliding plate is located above the hook, and a linkage block is fixedly installed at the bottom of the sliding plate, and the linkage block is connected to the hook through a linkage rod;

[0016] One end of the linkage rod is rotatably mounted on the linkage block, and the other end is rotatably mounted on the hook.

[0017] As a further solution of the present invention: the pulley group includes a first pulley and a second pulley. After the pull wire passes through the micro spring, it changes direction through the first pulley and passes into the wire groove. The wire groove is connected to the transverse groove. The direction of the wire groove is opened along the axial direction of the catheter. The end of the pull wire changes direction again through the second pulley to pass out of the catheter.

[0018] As a further solution of the present invention: the size of the limiting groove is set according to the movable range of the hook;

[0019] The width of the transverse groove matches the width of the sliding plate, the sliding plate is L-shaped, and the length of the sliding plate is greater than the length of the notch of the limiting groove.

[0020] As a further solution of the present invention: the intraoperative sealing adjustment assembly includes a threaded rod, an adjusting nut, an upper limit plate and a lower limit plate, the end of the pull wire is connected to the threaded rod, the upper limit plate and the lower limit plate are fixedly connected to the handle body, the adjusting nut is sleeved on the threaded rod, the threaded rod passes through the upper limit plate and the lower limit plate, and the adjusting nut is located between the upper limit plate and the lower limit plate.

[0021] As a further solution of the present invention: planes are cut out on the front and rear sides of the threaded rod along its own direction, and at the same time, the notches on the upper limit plate and the lower limit plate for the threaded rod to pass through match the cross-sectional size of the threaded rod.

[0022] As a further solution of the present invention: a plurality of hooks are fixedly installed on the top of the threaded rod, and a hanging ring is provided at the end of the pull wire, and the hanging ring is hooked on the hook.

[0023] As a further solution of the present invention: the position where the pull wire passes through the catheter corresponds to the position of the hook.

[0024] As a further solution of the present invention: a connecting rod is fixedly installed at the right end of the catheter, the top of the handle body is designed to be an arc surface that is embedded and installed with the outer wall of the catheter, and a socket is provided on the top of the handle body, and the size of the socket matches the connecting rod;

[0025] A mounting groove is arranged on the front side of the handle body, the mounting groove intersects with the insertion hole vertically, a pressing piece and a first spring are fixedly installed in the mounting groove, and a through hole for allowing the connecting rod to pass through is arranged on the pressing piece at a position corresponding to the insertion hole.

[0026] As a further solution of the present invention: the postoperative sealing mechanism comprises a left claw and a right claw, the bottom of the right claw is fixed to the handle body, the bottom of the left claw is rotatably connected to the right claw, and a second spring is installed between the left claw and the right claw;

[0027] The right clamping claw is provided with an electromagnet, and the left clamping claw is correspondingly provided with a magnet. A switch button is provided on the back of the handle body, and the switch button is used to control the switch of the electromagnet.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. During the operation, the specimen bag can be automatically sealed in the middle, dividing it into two independent cavities, reducing the cross-sectional size of the specimen bag after filling, making it smoother for the specimen bag to pass through the patient's wound, effectively reducing the pulling and secondary damage to the wound, and speeding up the operation process. At the same time, the independent cavity can better isolate different tissue specimens to avoid mutual contamination, which can improve the accuracy of subsequent pathological detection.

[0030] 2. When a second sample is needed and the mouth of the specimen bag is reopened, the tissue specimen in the specimen bag can be prevented from falling out, ensuring the safety of the operation and reducing the risk of infection caused by the falling specimen. At the same time, the tedious process of re-collecting the specimen is avoided, saving operation time and improving operation efficiency.

[0031] 3. After the operation, the pull rod can be fixed to tighten the bag opening of the specimen bag. The operator does not need to pull the pull rod all the time, which reduces the burden on the operator and allows the operator to focus more on other surgical operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the pull rod, the guide tube and the operating handle of the present invention when they are not installed;

[0033] Figure 2 It is a schematic diagram of the overall structure of the pull rod, the guide tube and the operating handle of the present invention in the installed state;

[0034] Figure 3 It is a schematic diagram of the distribution of the sealing mechanism during surgery of the present invention;

[0035] Figure 4 It is a schematic diagram of the structure of the sealing mechanism during surgery of the present invention when the hook is in an extended state;

[0036] Figure 5 It is a schematic structural diagram of the sealing mechanism during surgery of the present invention when the hook is in a retracted state;

[0037] Figure 6 It is a schematic diagram of the structure of the sealing mechanism during surgery when the hook is in the extended state after the elastic ring is removed;

[0038] Figure 7 It is a schematic diagram of the structure of the sealing mechanism during surgery when the hook is in a retracted state after the elastic ring is removed;

[0039] Figure 8 It is a schematic diagram of the end of the pull wire of the present invention passing through the catheter;

[0040] Fig. 9 It is a schematic diagram of the prior art when the object extractor is pulled out of the wound;

[0041] Fig.10 This is a schematic diagram of the present invention when the wound is pulled out;

[0042] Fig.11 It is a structural schematic diagram of the operating handle of the present invention;

[0043] Fig.12 It is a side structural schematic diagram of the operating handle of the present invention;

[0044] Fig.13This is a schematic diagram of the disassembled structure of the operating handle of the present invention;

[0045] Fig.14 It is a structural schematic diagram of the intraoperative sealing adjustment component of the present invention;

[0046] Fig.15 It is a structural schematic diagram of the postoperative sealing mechanism of the present invention;

[0047] Fig.16 The present invention is used in a state diagram Figure 1 ;

[0048] Fig.17 The present invention is used in a state diagram Figure 2 ;

[0049] Fig.18 The present invention is used in a state diagram Figure 3 ;

[0050] Fig.19 The present invention is used in a state diagram Figure 4 .

[0051] In the figure, 100, pull rod; 110, specimen bag; 111, support ring; 120, pull ring; 200, catheter; 210, intraoperative sealing mechanism; 211, elastic ring; 2110, annular groove; 212, hook; 2120, limiting groove; 2121, central axis; 213, sliding plate; 2130, transverse groove; 2131, linkage block; 2132, linkage rod; 214, micro spring; 215, pull wire; 2150, wire groove; 2151, hanging ring; 216, first pulley; 2161, second pulley; 220, connecting rod Connecting rod; 300, operating handle; 310, handle body; 311, jack; 312, mounting slot; 320, intraoperative sealing adjustment assembly; 321, threaded rod; 3211, hook; 322, adjusting nut; 323, upper limit plate; 324, lower limit plate; 325, notch; 330, postoperative sealing mechanism; 331, left clamping claw; 3311, magnet; 332, right clamping claw; 333, second spring; 3321, electromagnet; 340, pressing piece; 341, first spring; 342, through hole; 350, switch button. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] See also Figures 1 to 19In an embodiment of the present invention, an endoscopic specimen retrieval device includes a pull rod 100, a catheter 200 and an operating handle 300; wherein the catheter 200 is a hollow tube, the pull rod 100 is located inside the catheter 200, a specimen bag 110 is arranged at the left end of the pull rod 100, and a pull ring 120 for people to pull is fixedly installed at the right end of the pull rod 100; a support ring 111 is arranged at the bag opening of the specimen bag 110, and the support ring 111 is made of memory alloy material, and its function is to open the bag opening. The initial state of the support ring 111 is contracted in the catheter 200, and it will automatically open after extending out of the catheter 200, so as to open the bag opening of the specimen bag 110, and the pull rod 100 is repeatedly pulled to open and close the support ring 111, so that the bag opening of the specimen bag 110 can be repeatedly opened or closed.

[0054] A plurality of intraoperative sealing mechanisms 210 are provided on the left end surface of the catheter 200. The intraoperative sealing mechanisms 210 are arranged in a circular array on the end surface of the catheter 200. The intraoperative sealing mechanisms 210 are used to: when a large number of tissue specimens are collected in the specimen bag 110 during the operation (especially when the specimen bag 110 is half full), the specimen bag 110 which has been partially filled with tissue specimens is clamped by launching an elastic ring 211, so as to divide the specimen bag 110 into two upper and lower independent cavities (such as the upper and lower cavities). Fig.10 As shown in a in the middle, the tissue specimens already collected in the specimen bag 110 are sealed in the lower cavity, and the upper cavity becomes a new storage space. When the specimen bag 110 is opened again for the second time, the newly collected tissue specimens can be directly placed in the upper cavity.

[0055] Depend on Figures 1 to 8 It can be seen that an annular groove 2110 is provided on the left end face of the catheter 200, and the annular groove 2110 is used to place the elastic ring 211. It should be noted that the elastic ring 211 is not installed in the catheter 200 in the initial state. Before performing the surgical operation, the operator is required to install the elastic ring 211 on the hook 212 in the annular groove 2110.

[0056] The elastic ring 211 is an elastic rubber ring, which is stretched open by the hook 212. The sharp hook of the hook 212 hooks the elastic ring 211 outward. Since a plurality of sealing mechanisms 210 are provided during the operation, it can be known that a plurality of hooks 212 are also provided. These hooks 212 are distributed in a circular array in the annular groove 2110. These hooks 212 hook the elastic ring 211 at the same time to stretch the elastic ring 211 open. In this state, the elastic ring 211 is in an open state, and the pull rod 100, the specimen bag 110 and the support ring 111 can pass through the middle of the elastic ring 211 normally.

[0057] It should be noted that when the hook 212 releases the elastic ring 211, the elastic ring 211 will automatically shrink inward. The following will combine the structure and working principle of the intraoperative sealing mechanism 210 to specifically explain how the hook 212 opens and ejects the elastic ring 211 to clamp the specimen bag 110.

[0058] Depend on Figures 3 to 8 It can be seen that the intraoperative sealing mechanism 210 includes an elastic ring 211, a hook 212, a sliding plate 213, a micro spring 214, a pull wire 215 and a pulley block; the elastic ring 211 is located in the annular groove 2110, and the lower part of the annular groove 2110 is connected to the limiting groove 2120, and the hook 212 is rotatably installed in the limiting groove 2120 through the central axis 2121. Therefore, the hook 212 can rotate with the central axis 2121 as the rotation center, and the power that causes the hook 212 to rotate From the sliding plate 213, the sliding plate 213 is located above the hook 212, and the linkage block 2131 is fixedly installed at the bottom of the sliding plate 213. The linkage block 2131 and the sliding plate 213 are an integrated structure. The linkage block 2131 and the hook 212 are connected by a linkage rod 2132. The linkage rod 2132 is U-shaped as a whole. One end of the linkage rod 2132 passes through the linkage block 2131 and is rotatably installed with the linkage block 2131, and the other end passes through the hook 212 and is rotatably installed with the hook 212.

[0059] The movement process of the hook 212 and the sliding plate 213 is as follows: when the sliding plate 213 moves to the right, the linkage rod 2132 on the sliding plate 213 also moves to the right. Under the pulling effect of the linkage rod 2132, the hook 212 will rotate to the right with the central axis 2121 as the rotation center, and the effect of the right rotation of the hook 212 is to turn into the limiting groove 2120. When the sliding plate 213 moves to the far right, the hook 212 will be completely retracted into the limiting groove 2120 (the state is as shown in FIG. Figure 7 shown).

[0060] Correspondingly, when the sliding plate 213 moves to the left, the hook 212 will rotate to the left with the central axis 2121 as the rotation center until it extends out of the limiting groove 2120 (the state is as shown in FIG. Figure 6 As shown), the size of the limiting groove 2120 is set according to the movable range of the hook 212.

[0061] In order to prevent the sliding plate 213 from moving up and down when moving, the width of the transverse groove 2130 is designed to match the width of the sliding plate 213, and the sliding plate 213 is set to be L-shaped. This design can guide the movement process of the sliding plate 213, so that it can slide in a straight line along the transverse groove 2130. In addition, the length of the sliding plate 213 is greater than the slot length of the limiting groove 2120. With this design, when the sliding plate 213 moves to the far right, it can block the slot of the limiting groove 2120 and finally rest on the inner wall of the slot of the limiting groove 2120.

[0062] Depend on Figures 4 to 8 It can be seen that the left side of the sliding plate 213 is fixedly connected to the micro spring 214, and the micro spring 214 is fixedly installed in the transverse groove 2130, and the transverse groove 2130 is connected to the annular groove 2110. When the sliding plate 213 slides linearly along the transverse groove 2130, the micro spring 214 will expand and contract and change its own length accordingly.

[0063] The left end of the sliding plate 213 is fixedly connected to a pull wire 215, which passes through a micro spring 214, changes direction through a first pulley 216, and passes into a wire groove 2150, the wire groove 2150 is connected to the transverse groove 2130, and the direction of the wire groove 2150 is opened along the axial direction of the catheter 200, and the sliding plate 213 can be controlled to move to the left by pulling the pull wire 215.

[0064] The first pulley 216 and the second pulley 2161 are fixedly installed in the wire groove 2150, and the first pulley 216 is fixedly installed at the head end of the wire groove 2150, and the second pulley 2161 is fixedly installed at the tail end of the wire groove 2150. The function of the pull wire 215 is to change the routing direction of the pull wire 215, wherein the first pulley 216 allows the pull wire 215 to change from being parallel to the micro spring 214 to being parallel to the wire groove 2150. After the pull wire 215 passes through the wire groove 2150, the end of the pull wire 215 changes direction again through the second pulley 2161 to pass through the catheter 200.

[0065] Combination Figures 3 to 8 It can be seen that the movement process of the pull wire 215, the sliding plate 213 and the hook 212 is as follows: when the pull wire 215 is pulled, the sliding plate 213 will move to the left under the pulling of the pull wire 215, and at the same time, the linkage rod 2132 on the sliding plate 213 will pull the hook 212 to rotate to the left until the hook 212 extends out of the limiting groove 2120. At this time, the elastic ring 211 can be installed on the hook 212 with the help of tweezers or other tools, so that the hook 212 hooks and stretches the elastic ring 211 (such as Figure 4 shown).

[0066] The above content is a process of allowing the hook 212 to stretch the elastic ring 211 by pulling the pull wire 215. Correspondingly, by loosening the pull wire 215, the hook 212 can eject the elastic ring 211. The principle is as follows: when the pull wire 215 is loosened, the sliding plate 213 will automatically move to the right under the action of the micro spring 214 because the sliding plate 213 loses the pulling force of the pull wire 215. At the same time, the linkage rod 2132 on the sliding plate 213 pulls the hook 212 to rotate to the right, allowing the hook 212 to rotate into the limiting groove 2120. When the hook 212 retracts into the limiting groove 2120, the elastic ring 211 will detach from the hook 212 (such as Figure 5As shown in the figure, after the elastic ring 211 is separated from the hook 212, it will automatically shrink inwards under the action of its own elastic force, and the effect presented is that the elastic ring 211 will be ejected toward the central axis position of the catheter 200.

[0067] It can be seen from the above content that the operator can achieve the purpose of ejecting the elastic ring 211 by loosening the pull wire 215. The following will describe how to pull or loosen the pull wire 215 in conjunction with the structure of the operating handle 300.

[0068] Depend on Figures 1 to 15 It can be seen that the operating handle 300 includes a handle body 310 , an intraoperative sealing adjustment component 320 and a postoperative sealing mechanism 330 .

[0069] The intraoperative sealing adjustment component 320 includes a threaded rod 321, an adjusting nut 322, an upper limit plate 323 and a lower limit plate 324; the upper limit plate 323, the lower limit plate 324 are fixedly connected to the handle body 310 as an integrated structure, the threaded rod 321 passes through the upper limit plate 323 and the lower limit plate 324, the adjusting nut 322 is mounted on the threaded rod 321, and the adjusting nut 322 is located between the upper limit plate 323 and the lower limit plate 324.

[0070] Planes are cut out on the front and rear sides of the threaded rod 321 along its own direction. The upper limit plate 323 and the lower limit plate 324 are provided with slots 325 for the threaded rod 321 to pass through, and the slots 325 match the cross-sectional size of the threaded rod 321 .

[0071] It should be noted that in the above structure, the threaded rod 321 passes through the slot 325, and because the slot 325 is matched with the threaded rod 321 in size and is not circular, the threaded rod 321 cannot rotate in the slot 325. Since the adjusting nut 322 is limited between the upper limit plate 323 and the lower limit plate 324, when the operator turns the adjusting nut 322, the threaded rod 321 can only move up and down (its structure and principle are similar to the adjustment principle of a wrench).

[0072] A plurality of hooks 3211 are fixedly mounted on the top of the threaded rod 321 , and a hanging ring 2151 is provided at the end of the pull wire 215 , and the hanging ring 2151 is hooked on the hook 3211 .

[0073] By turning the adjusting nut 322, the threaded rod 321 can be controlled to move up and down, so the up and down position of the hook 3211 can be adjusted. The downward movement of the hook 3211 will tighten the pull wire 215, and the upward movement of the hook 3211 will loosen the pull wire 215. Combining the intraoperative sealing adjustment component 320 and the intraoperative sealing mechanism 210, it can be known that the working process of the two is as follows:

[0074] The operator turns the adjusting nut 322 (a prompt sign can be set near the adjusting nut 322, such as turning to the left to tighten and turning to the right to loosen). If the control threaded rod 321 moves upward, the hook 3211 will move upward synchronously, thereby loosening the pull wire 215. As explained in the previous text, when the pull wire 215 is loosened, the sliding plate 213 will automatically move to the right under the action of the micro spring 214, allowing the hook 212 to retract and release the elastic ring 211. The released elastic ring 211 will automatically shrink inward.

[0075] When the operator pulls the support ring 111 and part of the specimen bag 110 back into the catheter 200 (eg Fig.17 As shown in the figure, the part of the specimen bag 110 containing the tissue specimen will remain outside the catheter 200. At this time, by screwing the adjusting nut 322, the elastic ring 211 is released, and the elastic ring 211 is allowed to shrink inward and ejected onto the specimen bag 110, and the specimen bag 110 is clamped and sealed from the middle. After the elastic ring 211 seals the specimen bag 110, the specimen bag 110 is divided into two independent cavities, the cross-sectional size of the filled specimen bag is reduced, and it is easier to pass through the patient's wound.

[0076] It can be seen from the above content that during the operation, the operator only needs to turn the adjusting nut 322 to eject the elastic ring 211 and complete the intraoperative sealing operation of the specimen bag 110 .

[0077] After the elastic ring 211 seals the specimen bag 110 during the operation, the operator pushes the pull rod 100 to open the bag opening of the specimen bag 110 again, and can take out the remaining tissue specimens for a second time.

[0078] It should be noted that the position where the pull wire 215 passes through the catheter 200 corresponds to the position of the hook 3211. The pull wire 215 close to the hook 3211 can directly pass through the catheter 200, and the pull wire 215 far from the hook 3211 can go along the wire groove 2150 to the position close to the hook 3211, and then go around the inner wall of the catheter 200 and pass out (such as Figure 8 shown).

[0079] Depend on Figures 1 to 15 It can be seen that the connecting rod 220 is fixedly installed on the right end of the catheter 200; the top of the handle body 310 is designed to be an arc surface that is embedded and installed with the outer wall of the catheter 200, and a socket 311 is set on the top of the handle body 310. The size of the socket 311 matches the connecting rod 220, and the catheter 200 and the handle body 310 are connected with the connecting rod 220 through the size of the socket 311.

[0080] A mounting groove 312 is provided on the front side of the handle body 310, and the mounting groove 312 intersects with the insertion hole 311 vertically. A first spring 341 is fixedly installed in the mounting groove 312, and the first spring 341 and the pressing member 340 are fixedly connected. The pressing member 340 is located in the mounting groove 312, and the pressing member 340 is provided with a through hole 342 at a position corresponding to the insertion hole 311, and when the first spring 341 is in a compressed state, the through hole 342 is aligned with the insertion hole 311.

[0081] After the operator presses the pressing piece 340, the through hole 342 is aligned with the socket 311. At this time, the operator can directly insert the connecting rod 220 into the socket 311 to complete the installation of the catheter 200 and the operating handle 300. After that, the operator releases the pressing piece 340, and the pressing piece 340 will automatically clamp the connecting rod 220 to fix the catheter 200 on the operating handle 300.

[0082] It can be seen from the above content that the operating handle 300 and the catheter 200 are detachably connected and therefore the operating handle 300 can be reused.

[0083] Depend on Figures 1 to 15 It can be seen that the postoperative sealing mechanism 330 includes a left claw 331 and a right claw 332. The bottom of the right claw 332 is fixed to the handle body 310. The bottom of the left claw 331 is rotatably hinged with the right claw 332. The left claw 331 can rotate with the connection as the rotation center. The second spring 333 is fixedly installed between the left claw 331 and the right claw 332. The right claw 332 is fixedly installed with an electromagnet 3321, and the left claw 331 is fixedly installed with a magnet 3311 at a corresponding position. A switch button 350 is set on the back of the handle body 310. The switch button 350 is used to control the switch of the electromagnet 3321.

[0084] Under the action of the second spring 333, the left clamping claw 331 and the right clamping claw 332 are initially in an open state. The operator turns on the electromagnet 3321 through the switch button 350. After the electromagnet 3321 is turned on, it will generate magnetism and attract the magnet 3311, so as to achieve the effect of clamping the left clamping claw 331 and the right clamping claw 332. When the left clamping claw 331 and the right clamping claw 332 are clamped, they will clamp the pull rod 100.

[0085] After the operation is completed, the pull rod 100 needs to be pulled to tighten the bag opening of the specimen bag 110 (such as Fig.10 The specific operation is to pull the support ring 111 back to the catheter 200 to tighten the bag opening of the specimen bag 110. Then the operator uses the switch button 350 to clamp the pull rod 100 with the left clamping claw 331 and the right clamping claw 332. This can replace human hands and keep the bag opening of the specimen bag 110 in a tightened state at all times, which helps the operator free up his hands to perform other surgical operations and reduces the burden on the operator.

[0086] Depend on Figures 1 to 19 It can be known that the use steps of the present invention are as follows:

[0087] S1: Insert the connecting rod 220 into the insertion hole 311 to complete the assembly of the catheter 200 and the operating handle 300.

[0088] S2: Hook the hanging ring 2151 onto the hook 3211, then turn the adjusting nut 322 to adjust the tightness of the pull line 215, and at the same time use tweezers or a stick to stretch the elastic ring 211 onto the hook 212.

[0089] S3: Collect tissue specimens (such as Fig.16 shown).

[0090] S4: After collecting a certain amount of tissue specimens or between two collections, the specimen bag 110 is partially pulled back into the catheter 200, and then the adjusting nut 322 is screwed to loosen the elastic ring 211, so that the elastic ring 211 automatically seals the middle of the specimen bag 110 during the operation (e.g. Fig.17 shown).

[0091] S5: Open the specimen bag 110 again and collect the remaining tissue specimens (such as Fig.18 shown).

[0092] S6: After the operation is completed, the specimen bag 110 is pulled back. When the mouth of the specimen bag 110 is in a tightened state, the switch button 350 is pressed to use the postoperative sealing mechanism 330 to keep the specimen bag 110 in a tightened state (such as Fig.19 shown).

[0093] S7: Take out the entire retriever from the wound.

[0094] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0095] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An endoscopic specimen extractor, comprising a pull rod (100), a catheter (200) and an operating handle (300), characterized in that: A specimen bag (110) is arranged at the left end of the pull rod (100), a support ring (111) is arranged at the bag opening of the specimen bag (110), and a pull ring (120) is fixedly installed at the right end of the pull rod (100); The catheter (200) is a hollow tube, and a sealing mechanism (210) is provided on the left end surface of the catheter (200). There are a plurality of sealing mechanisms (210) distributed in a circular array on the left end surface of the catheter (200); The intraoperative sealing mechanism (210) comprises an elastic ring (211), a hook (212), a sliding plate (213), a micro spring (214), a pull wire (215) and a pulley block; An annular groove (2110) is provided on the left end surface of the conduit (200) for accommodating an elastic ring (211), the elastic ring (211) is opened by a hook (212), a limiting groove (2120) is provided below the annular groove (2110), the hook (212) is rotatably mounted in the limiting groove (2120), and the hook (212) is connected to the sliding plate (213) via a linkage rod (2132); The left side of the sliding plate (213) is fixedly connected to the micro spring (214), the micro spring (214) and the sliding plate (213) are located in the transverse groove (2130), and the left side of the micro spring (214) is fixedly connected to the transverse groove (2130), and the transverse groove (2130) is connected to the annular groove (2110); The left end of the sliding plate (213) is fixedly connected to a pull wire (215), the pull wire (215) passes through a micro spring (214), and the pull wire (215) changes direction through a pulley group and passes out of the catheter (200); The operating handle (300) is plugged and fixed to the catheter (200), and the operating handle (300) includes a handle body (310), an intraoperative sealing adjustment component (320) and a postoperative sealing mechanism (330), and the end of the pull wire (215) is connected to the intraoperative sealing adjustment component (320).

2. The endoscopic specimen extractor according to claim 1, characterized in that: The hook (212) is rotatably mounted in the limiting groove (2120) via a central axis (2121); The sliding plate (213) is located above the hook (212), and a linkage block (2131) is fixedly installed at the bottom of the sliding plate (213), and the linkage block (2131) is connected to the hook (212) via a linkage rod (2132); One end of the linkage rod (2132) is rotatably mounted on the linkage block (2131), and the other end is rotatably mounted on the hook (212).

3. The endoscopic specimen extractor according to claim 1, characterized in that: The pulley group includes a first pulley (216) and a second pulley (2161). After the pull wire (215) passes through the micro spring (214), it changes direction through the first pulley (216) and passes into the wire groove (2150). The wire groove (2150) is connected with the transverse groove (2130), and the direction of the wire groove (2150) is opened along the axial direction of the catheter (200). The end of the pull wire (215) changes direction again through the second pulley (2161) and passes out of the catheter (200). The first pulley (216) and the second pulley (2161) are respectively fixedly installed at the head and tail positions of the wire groove (2150).

4. The endoscopic specimen extractor according to claim 1, characterized in that: The size of the limiting groove (2120) is set according to the range of motion of the hook (212); The width of the transverse groove (2130) matches the width of the sliding plate (213); the sliding plate (213) is L-shaped, and the length of the sliding plate (213) is greater than the length of the notch of the limiting groove (2120).

5. The endoscopic specimen extractor according to claim 1, characterized in that: The intraoperative sealing adjustment component (320) comprises a threaded rod (321), an adjustment nut (322), an upper limit plate (323) and a lower limit plate (324); The end of the pull wire (215) is hung on the threaded rod (321); The upper limit plate (323) and the lower limit plate (324) are fixedly connected to the handle body (310); the adjusting nut (322) is sleeved on the threaded rod (321); the threaded rod (321) passes through the upper limit plate (323) and the lower limit plate (324); and the adjusting nut (322) is located between the upper limit plate (323) and the lower limit plate (324).

6. The endoscopic specimen extractor according to claim 5, characterized in that: Planes are cut out along the axial direction of the threaded rod (321) at the front and rear sides thereof, and notches (325) are arranged on the upper limit plate (323) and the lower limit plate (324), the notches (325) allow the threaded rod (321) to pass through, and the notches (325) match the cross-sectional size of the threaded rod (321).

7. The endoscopic specimen extractor according to claim 6, characterized in that: A plurality of hooks (3211) are fixedly mounted on the top of the threaded rod (321), and a hanging ring (2151) is provided at the end of the pull line (215), and the hanging ring (2151) is hooked on the hook (3211).

8. The endoscopic specimen extractor according to claim 7, characterized in that: The position where the pull wire (215) passes through the catheter (200) corresponds to the position of the hook (3211).

9. The endoscopic specimen extractor according to claim 1, characterized in that: A connecting rod (220) is fixedly mounted on the right end of the conduit (200); The top of the handle body (310) is designed to be an arc surface that fits in with the outer wall of the catheter (200), and a plug hole (311) is provided on the top of the handle body (310), and the size of the plug hole (311) matches that of the connecting rod (220); The front side of the handle body (310) is provided with a mounting groove (312), the mounting groove (312) intersects with the insertion hole (311) vertically, a first spring (341) is fixedly installed in the mounting groove (312), the first spring (341) is fixedly connected to the pressing member (340), and the pressing member (340) is provided with a through hole (342) for allowing the connecting rod (220) to pass through at a position corresponding to the insertion hole (311).

10. The endoscopic specimen extractor according to claim 1, characterized in that: The postoperative sealing mechanism (330) comprises a left clamping claw (331) and a right clamping claw (332), the bottom of the right clamping claw (332) is fixed to the handle body (310), the bottom of the left clamping claw (331) is rotatably connected to the right clamping claw (332), and a second spring (333) is fixedly installed between the left clamping claw (331) and the right clamping claw (332); An electromagnet (3321) is fixedly mounted on the right clamping claw (332), and a magnet (3311) is fixedly mounted at a corresponding position on the left clamping claw (331). A switch button (350) is arranged on the back of the handle body (310), and the switch button (350) is used to control the switch of the electromagnet (3321).

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