A tumor extraction device

Abstract

The utility model relates to medical auxiliary instrument technical field. A kind of tumour extraction device, including the inner sheath and outer sheath of inside and outside setting, the side wall of the end of inner sheath is equipped with an opening slot, to opening slot as working chamber;Working chamber is provided with an inner bag, the opening of inner bag is towards the opening of opening slot, and the opening of inner bag is installed with pull line;The opening of inner bag is connected with bag mouth tightening mechanism by pull line;It further includes a covering film for covering the opening of opening slot and the opening of inner bag, covering film is connected with outer sheath or inner sheath. When tumour is placed into inner bag, bag mouth tightening mechanism is tightened, once for tumour that inner bag cannot be covered, can be secondarily wrapped by covering film, avoid tumour with inner and outer sheath extraction process, contact urethra.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary device technology, specifically to a tumor removal device. Background Technology

[0002] Non-muscle-invasive bladder cancer is the most common malignant tumor of the bladder, invading the mucosal layer or the lamina propria. Traditional transurethral resection of bladder tumor (TURP) is the primary treatment for non-muscle-invasive bladder cancer. However, due to its fragmented tumor resection, there is a high risk of residual tumor, dissemination, and recurrence. Furthermore, it cannot provide complete specimens for pathological diagnosis, resulting in a low detection rate of the detrusor muscle layer, which often leads to an underestimation of the tumor stage and affects the choice of subsequent treatment.

[0003] In recent years, transurethral en bloc resection of bladder tumors has attracted increasing attention from urologists. This technique allows for the complete removal of the tumor, avoiding incision and dissemination, and preserving the intact histological layers of the tumor specimen, which facilitates more accurate pathological diagnosis.

[0004] The size of the bladder tumor is considered a major factor limiting the technique of en bloc resection of transurethral bladder tumors.

[0005] For larger tumors (even those > 3 cm), although the procedure becomes more difficult, it is still technically feasible. In practice, dividing the entire specimen into 2-3 pieces and removing them separately can still ensure complete local resection of the bladder tumor and accurate staging.

[0006] Currently, there are various tumor removal devices, such as a bladder tumor resection device disclosed in CN107126253A, and an umbrella-shaped negative pressure suction forceps for soft tissue specimens disclosed in CN111803141A. Although these can all remove tumors, they cannot isolate the tumor from the urethra during the removal process. Utility Model Content

[0007] In view of the problems existing in the prior art, the present invention provides a tumor removal device, which solves at least one of the above-mentioned technical problems.

[0008] The technical solution of this utility model is: a tumor removal device, comprising an inner sheath and an outer sheath disposed inside and outside, characterized in that an opening groove is formed on the side wall of the end of the inner sheath, and the opening groove serves as a working cavity;

[0009] An inner bag is provided inside the working chamber, the opening of the inner bag faces the opening of the opening slot, and a pull cord is installed at the opening of the inner bag.

[0010] The opening of the inner bag is connected to the bag opening tightening mechanism via a pull-out line;

[0011] It also includes a covering film for covering the opening of the opening slot and the opening of the inner bag, the covering film being connected to the outer sheath or the inner sheath.

[0012] After the tumor is placed into the inner bag, the bag opening tightening mechanism tightens it. If the inner bag cannot cover the tumor, it can be covered again with a covering film to prevent the tumor from coming into contact with the urethra during the removal of the inner and outer sheaths.

[0013] More preferably, the covering film is connected to the inner sheath, and the covering film is connected to the region below the working chamber;

[0014] A water inlet pipe is provided on the outer sheath, and the water inlet pipe is connected to the gap between the inner sheath and the outer sheath.

[0015] After the tumor is encased in the inner bag, water is injected into the gap between the inner and outer sheaths through the water inlet channel. At the same time, the inner sheath is pulled outward. At this time, due to the friction between the inner and outer sheaths and the action of water entering between the inner and outer sheaths, the encapsulating membrane covers the working cavity.

[0016] Alternatively, the covering film is arranged in an umbrella shape, narrow at the top and wide at the bottom, surrounding the outer wall of the outer sheath, and the opening at the top center of the covering film is connected to the top outer side of the outer sheath.

[0017] After the tumor is encased in the inner bag, the inner and outer sheaths are simultaneously withdrawn from the body. At this point, due to the friction of the body, the covering membrane flips upward and wraps around the working cavity.

[0018] More preferably, it also includes an external sheath, the external sheath comprising a connector coaxially rotatably connected to and an external body.

[0019] The inner sheath is connected to the outer body, and the connector is used to rotate and snap the inner sheath.

[0020] The inner sheath is provided with a vertically arranged water inlet channel;

[0021] The external body is provided with a docking water inlet channel that docks with the water inlet channel of the inner sheath.

[0022] It facilitates the supply of water to the inner sheath through the outer sheath.

[0023] More preferably, the lower end of the inner sheath is provided with a rotating snap ring and a positioning protrusion arranged vertically;

[0024] The external body has a positioning groove for longitudinally inserting the positioning protrusion;

[0025] The connector is provided with a slot structure for longitudinally inserting the rotating snap ring and rotating it into place.

[0026] More preferably, the slot structure includes an upper limit protrusion and a lower limit protrusion arranged at the top and bottom, and the gap between the upper limit protrusion and the lower limit protrusion is a limiting area for rotating and engaging the rotating snap ring;

[0027] The external body is provided with a main body positioning point, and the connector is connected to a rotating rod and a connector positioning point.

[0028] When the connector positioning point is set vertically to correspond with the main body positioning point, the inner sheath is inserted longitudinally into the connector and abuts against the connector. At this time, the rotating locking ring is located on the periphery of the area between the upper limit protrusion and the lower limit protrusion. By rotating the connector, the rotating locking ring is locked between the upper limit protrusion and the lower limit protrusion.

[0029] More preferably, the inner sheath has a hollow negative pressure channel that mates with the opening groove;

[0030] The external body has a negative pressure suction port, which is connected to the hollow negative pressure channel.

[0031] More preferably, the inner bag is provided with an upper opening and a lower opening, and the upper opening of the inner bag is connected to the top outer contour of the opening groove.

[0032] The lower opening of the inner bag is connected to the bottom of the opening groove;

[0033] The inner bag has a vertically arranged strip opening on its outer circumference that connects to the upper opening and the lower opening, with the strip opening serving as the opening of the inner bag.

[0034] The left and right connecting lines are threaded through the left and right ends of the inner bag opening;

[0035] The top of the left connecting line is fixedly connected to the top left side of the opening of the inner bag, and the top of the right connecting line is fixedly connected to the top right side of the opening of the inner bag.

[0036] More preferably, the drawstring is made of a highly resilient metal or polymer material, such as nickel-titanium alloy, stainless steel, or PEEK.

[0037] More preferably, the bag opening tightening mechanism includes a bag opening lateral closing push-pull rod and a bag opening longitudinal closing push-pull rod, wherein the bag opening lateral closing push-pull rod includes an end limiting ring, a connecting post and a first pull rod arranged sequentially from top to bottom along the axial direction;

[0038] The end limiting ring has an oval hole for connecting lines to pass through side by side on the left and right sides of the bag opening, and the length direction of the end limiting ring is the front-back direction;

[0039] Two connecting posts are provided. The two connecting posts are connected to both ends of the end limiting ring in the length direction. The two connecting posts connect the end limiting ring and the first pull rod, and form an opening for the lateral lead-out of the connecting line.

[0040] The longitudinal closing push-pull rod of the bag opening is located in front of or behind the first pull rod;

[0041] The connecting line on the left side of the bag opening passes through the oval hole and extends to the right corner formed by the first pull rod and the longitudinal closing push-pull rod of the bag opening;

[0042] The connecting line on the right side of the bag opening passes through the oval hole and extends to the left to the left corner formed by the first pull rod and the longitudinal closing push-pull rod of the bag opening.

[0043] While keeping the longitudinal closing push-pull rod of the bag opening unchanged, push the transverse closing push-pull rod of the bag opening upward to achieve transverse closure of the bottom of the bag opening. Simultaneously, the transverse closing push-pull rod and the longitudinal closing push-pull rod of the bag opening are pulled downward, thereby causing the bag opening to be longitudinally pulled closed.

[0044] More preferably, it further includes an endoscope, which is disposed inside and outside the inner sheath, or the endoscope is disposed side by side with the inner sheath inside the outer sheath.

[0045] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0046] 1. An inner bag design is used instead of a mesh bag to ensure that the tumor is completely wrapped, prevent the loss of small tumor fragments, and reduce the risk of secondary contamination.

[0047] 2. The bag opening is made of highly resilient material, which allows the capacity of the working chamber to expand with the opening, ensuring that even large tumors can be completely encapsulated.

[0048] 3. To address the issue that large tumors may prevent the bag opening from closing completely, a covering membrane design has been added to further prevent the tumor from contacting the urethra and reduce the chance of dissemination and implantation. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of a specific embodiment 1 of the present utility model;

[0050] Figure 2 This is a schematic diagram of the structure of the inner sheath in a specific embodiment 1 of this utility model;

[0051] Figure 3 This is a specific embodiment 1 of the present utility model. Figure 2 Sectional view at point A in the middle.

[0052] Figure 4 This is a partial structural diagram of the bottom of the inner sheath in a specific embodiment 1 of this utility model;

[0053] Figure 5 This is a schematic diagram of the structure of an external sheath according to a specific embodiment 1 of the present invention;

[0054] Figure 6 This is a cross-sectional view of the outer sheath of a specific embodiment 1 of this utility model;

[0055] Figure 7 This is a partial structural diagram of the combination of the outer sheath and the inner sheath in a specific embodiment 1 of this utility model;

[0056] Figure 8 This is a schematic diagram of the bag opening in its initial state according to a specific embodiment of the present invention;

[0057] Figure 9 This is a schematic diagram of the bag opening in the specific embodiment 1 of this utility model;

[0058] Figure 10 This is a schematic diagram of the bottom of the bag opening in a horizontally pulled-out and tightened state in a specific embodiment of this utility model;

[0059] Figure 11 This is a schematic diagram of the bag opening in a longitudinally pulled-out and tightened state according to a specific embodiment of the present invention;

[0060] Figure 12 This is a schematic diagram of the bag opening tightening mechanism in a specific embodiment of the present invention;

[0061] Figure 13 This is a specific embodiment 1 of the present utility model. Figure 11 A magnified view of a section at point C;

[0062] Figure 14 This is a schematic diagram of the state in which the inner sheath of the device is inserted into the bladder but not yet propelled out, according to a specific embodiment of the present invention.

[0063] Figure 15 This is a schematic diagram of the state in which the inner sheath is pushed out of the bladder in a specific embodiment 1 of this utility model;

[0064] Figure 16 This is a schematic diagram showing the working state of a specific embodiment 1 of the present invention;

[0065] Figure 17 This is a schematic diagram of the wrapped-out state in a specific embodiment 1 of this utility model;

[0066] Figure 18 This is a schematic diagram of a specific embodiment 2 of the present utility model.

[0067] In the diagram, 100 represents the outer sheath, and 130 represents the water inlet pipe.

[0068] 200 is the inner sheath, 210 is the head, 220 is the opening groove, 2301 is the water inlet channel of the inner sheath, 2302 is the hollow negative pressure channel, 2303 is the positioning protrusion, 2304 is the scale line, 2305 is the rotating locking ring, and 2306 is the limiting block.

[0069] 300 is a endoscope, 400 is a covering film;

[0070] 500 is the inner pocket, and 520 is the opening of the inner pocket.

[0071] 600 is the bag opening tightening mechanism; 610 is the bag opening longitudinal closing push-pull rod; 620 is the bag opening transverse closing push-pull rod; 6201 is the end limiting ring; 6202 is the connecting post.

[0072] 700 is the external sheath, 710 is the connector, 7101 is the rotating rod, 7102 is the upper limit protrusion, 7103 is the lower limit protrusion, 7104 is the connector positioning point, and 720 is the sealing ring.

[0073] 730 is the external body, 7301 is the negative pressure suction port, 7302 is the docking water inlet channel, 7305 is the main body positioning point, and 7306 is the positioning groove. Detailed Implementation

[0074] See Figures 1 to 17 In specific embodiment 1, a tumor removal device includes an inner sheath 200 and an outer sheath 100 disposed inside and outside. An opening groove 220 is formed on the side wall of the end of the inner sheath 200, serving as a working chamber. The head 210 of the inner sheath 200 has a hemispherical structure. The opening groove 220 is located below the head 210 of the inner sheath 200. The inner sheath 200 is a multi-lumen tube. A vertically arranged hollow negative pressure channel 2302 and an inner sheath water inlet channel 2301 are formed on the inner sheath 200.

[0075] An inner bag 500 is provided inside the working chamber, with its opening 520 facing the opening of the opening slot 220. A pull-out cord is installed at the opening 520 of the inner bag 500. The opening 520 of the inner bag 500 is connected to the bag opening tightening mechanism 600 via the pull-out cord. It also includes a covering film 400 for covering the opening of the opening slot 220 and the opening 520 of the inner bag 500. The covering film 400 is connected to either the outer sheath 100 or the inner sheath 200. The inner bag 500 is made of an elastic membrane. When a tumor is placed into the inner bag 500, the bag opening tightening mechanism 600 tightens it. For tumors that the inner bag 500 cannot cover, a secondary covering can be provided using the covering film 400, preventing the tumor from contacting the urethra during removal of the inner and outer sheaths.

[0076] It also includes an outer sheath 700, which includes a connector 710 and an outer body 730 that are coaxially rotatably connected. The inner sheath 200 is connected to the outer body 730, and the connector 710 is used to rotatably engage the inner sheath 200. The inner sheath 200 has a vertically arranged inner sheath water inlet channel 2301. The outer body 730 has a docking water inlet channel 7302 that docks with the inner sheath water inlet channel 2301. This facilitates water supply to the inner sheath 200 through the outer sheath 700. The docking water inlet channel 7302 is provided with an upwardly extending extension tube that extends into the inner sheath water inlet channel 2301.

[0077] The lower end of the inner sheath 200 is provided with a rotating snap ring 2305 and a positioning protrusion 2303 arranged vertically; the outer body 730 is provided with a positioning groove 7306 for longitudinally inserting the positioning protrusion 2303; the connector 710 is provided with a slot structure for longitudinally inserting the rotating snap ring 2305 and rotatingly snapping the rotating snap ring 2305. The slot structure includes an upper limit protrusion 7102 and a lower limit protrusion 7103 set vertically. The gap between the upper limit protrusion 7102 and the lower limit protrusion 7103 is the limiting area for rotating and engaging the rotating locking ring 2305. The outer body 730 is provided with a main body positioning point 7305, and the connector 710 is connected with a rotating rod 7101 and a connector positioning point 7104. When the connector positioning point 7104 and the main body positioning point 7305 are vertically aligned, the inner sheath 200 is inserted longitudinally into the connector 710 and abuts against the connector 710. At this time, the rotating locking ring 2305 is located outside the area between the upper limit protrusion 7102 and the lower limit protrusion 7103. The rotating connector 710 is used to engage the rotating locking ring 2305 between the upper limit protrusion 7102 and the lower limit protrusion 7103. The inner sheath 200 has a hollow negative pressure channel 2302 that mates with the opening slot 220; the outer body 730 has a negative pressure suction port 7301, which mates with the hollow negative pressure channel 2302. A limiting block 2306 is fixed on the inner sheath 200, located directly below the rotating snap ring 2305, and is used to abut against the lower limiting protrusion 7103 for positioning during rotation. The top of the negative pressure suction port 7301 has an upwardly extending crescent-shaped interface, the outer wall of which is covered with a sealing ring 720, which is located between the crescent-shaped interface and the hollow negative pressure channel 2302 of the inner sheath 200. An extension tube is provided at the notch of the crescent-shaped interface. Scale lines 2304 are provided on the outer wall of the inner sheath 200. The zero point of the scale line 2304 is located at the lower end of the inner sheath 200.

[0078] The inner bag 500 has an upper opening and a lower opening. The upper opening of the inner bag is connected to the top outer contour of the opening groove 220; the lower opening of the inner bag 500 is connected to the bottom of the opening groove 220. Specifically, the lower opening of the inner bag is tightly fitted around the inner wall of the hollow negative pressure channel 2302.

[0079] The inner bag 500 has a vertically oriented strip opening on its outer circumference that aligns with both the upper and lower openings, serving as the inner bag opening 520. A left connecting wire and a right connecting wire pass through the left and right ends of the inner bag opening 500. The top of the left connecting wire is fixedly connected to the top left side of the inner bag opening 520, and the top of the right connecting wire is fixedly connected to the top right side of the inner bag opening 520. Both the left and right connecting wires are made of highly resilient metal or polymer materials, such as nickel-titanium alloy, stainless steel, or PEEK.

[0080] The bag opening tightening mechanism 600 includes a transverse closing push-pull rod 620 and a longitudinal closing push-pull rod 610. The transverse closing push-pull rod 620 includes an end limiting ring 6201, a connecting post 6202, and a first pull rod arranged sequentially from top to bottom along the axial direction. The end limiting ring 6201 has an oblong hole for connecting lines passing through the left and right sides of the bag opening side by side. The length direction of the end limiting ring 6201 is the front-to-back direction. Two connecting posts 6202 are provided, and the two connecting posts 6202 are connected to the end limiting ring 610. The two ends of the positioning ring 6201 are connected in the length direction. The two connecting posts 6202 connect the end limiting ring 6201 and the first pull rod, and form an opening for the lateral lead-out of the connecting line. The longitudinal closing push-pull rod 610 of the bag opening is located in front of or behind the first pull rod. The connecting line on the left side of the bag opening passes through the oval hole and extends to the right to the right corner formed by the first pull rod and the longitudinal closing push-pull rod 610 of the bag opening. The connecting line on the right side of the bag opening passes through the oval hole and extends to the left to the left corner formed by the first pull rod and the longitudinal closing push-pull rod 610 of the bag opening.

[0081] The lower ends of the left and right connecting lines are connected to the longitudinal closing push-pull rod of the bag opening.

[0082] While keeping the position of the longitudinal closing push-pull rod 610 of the bag opening unchanged, push the transverse closing push-pull rod 620 of the bag opening upward to achieve transverse closure of the bottom of the bag opening. Simultaneously, drive the transverse closing push-pull rod 620 and the longitudinal closing push-pull rod 610 of the bag opening downward, thereby causing the bag opening to be longitudinally pulled closed.

[0083] See Figures 8 to 11 This is a diagram illustrating the changes in the bag opening. See the initial state. Figure 8 The opening of the inner bag 500 is strip-shaped. Upon entering the bladder opening, the shape-memory metal opens the opening of the inner bag 500, causing it to expand. See [link / reference needed]. Figure 9While keeping the longitudinal closing push-pull rod 610 of the bag opening unchanged, push the transverse closing push-pull rod 620 of the bag opening upward to achieve transverse closure of the bottom of the bag opening. See [link / reference]. Figure 10 Simultaneously, this causes the horizontal closing push-pull rod 620 and the vertical closing push-pull rod 610 of the bag opening to be pulled downwards, thereby causing the bag opening to be pulled and closed vertically. See also Figure 11 .

[0084] It also includes an endoscope 300, which is disposed inside and outside the inner sheath 200, or the endoscope 300 and the inner sheath 200 are disposed side by side inside the outer sheath 100.

[0085] The covering membrane 400 is connected to the inner sheath 200 and also to the area below the working chamber. A water inlet pipe 130 is provided on the outer sheath 100, and the water inlet pipe 130 is connected to the gap between the inner sheath 200 and the outer sheath 100. After the tumor is encased in the inner bag 500, water is injected into the gap between the inner sheath 200 and the outer sheath 100 through the water inlet channel. Simultaneously, the inner sheath 200 is pulled outwards. At this time, due to friction between the inner and outer sheaths and the action of water entering between them, the covering membrane 400 encapsulates the working chamber.

[0086] For working principle, please refer to Figure 14 The tip of the outer sheath 100 has begun to enter the bladder, while the inner sheath 200 remains covered by the outer sheath 100. See also Figure 15 This demonstrates the state of the inner sheath 200 being pushed out of the outer sheath 100 until the covering membrane 400 is completely inside the bladder. Externally, the state of the covering membrane can be determined by checking the zero mark on the scale.

[0087] See Figure 16 This demonstrates the operational phase of this example. In this phase, the deformation of the shape-memory metal at the opening of the inner bag causes the inner bag 500 to open. The operator precisely locates the tumor using a speculum 300, retrieves the tumor through the inner bag 500, and, with the assistance of the negative pressure water outlet channel 2302, adsorbs and fixes the tumor. During this process, the tumor is guided and restrained by the inner bag 500. At this time, the covering membrane 400 is in a free-floating state.

[0088] See Figure 17 This is the extubation stage. In this stage, the operator first pulls the horizontal closing push-pull rod 620 to tightly close the bag opening laterally, and then pulls the vertical closing push-pull rod 610 to tightly wrap the inner bag 500 around the tumor. As the inner sheath 200 is pulled outwards, water is simultaneously injected into the gap between the inner and outer sheaths through the outer sheath water inlet channel 130. The action of the water flow and friction causes the covering membrane 400 to reverse, further wrapping the entire working cavity. This process effectively avoids re-contact between the tumor and the bladder and urethra, ensuring the safety of the operation and the complete removal of the tumor.

[0089] See Figure 18 In specific embodiment 2, based on specific embodiment 1, the difference is that the covering membrane 400 is arranged in an umbrella shape, narrow at the top and wide at the bottom, surrounding the outer wall of the outer sheath 100, and the central opening at the top of the covering membrane 400 is connected to the outer side of the top of the outer sheath 100. After the tumor is wrapped in the inner bag 500, the inner sheath 200 and the outer sheath 100 are simultaneously pulled out from the human body. At this time, due to the friction force of the human body, the covering membrane flips upward and wraps around the working cavity. Figure 18 The diagram shown is of the film 400 flipped up.

[0090] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A tumor removal device, comprising an inner sheath and an outer sheath disposed inside and outside, characterized in that, An opening groove is formed on the side wall of the end of the inner sheath, and the opening groove serves as the working chamber; An inner bag is provided inside the working chamber, the opening of the inner bag faces the opening of the opening slot, and a pull cord is installed at the opening of the inner bag. The opening of the inner bag is connected to the bag opening tightening mechanism via a pull-out line; It also includes a covering film for covering the opening of the opening slot and the opening of the inner bag, the covering film being connected to the outer sheath or the inner sheath.

2. The tumor removal device according to claim 1, characterized in that: The covering membrane is connected to the inner sheath, and the covering membrane is also connected to the region below the working chamber; A water inlet pipe is provided on the outer sheath, and the water inlet pipe is connected to the gap between the inner sheath and the outer sheath.

3. The tumor removal device according to claim 1, characterized in that: The covering film is arranged in an umbrella shape, narrow at the top and wide at the bottom, surrounding the outer wall of the outer sheath, and the opening at the top center of the covering film is connected to the top outer side of the outer sheath.

4. A tumor removal device according to claim 1, characterized in that: It also includes an external sheath, which comprises a connector with a coaxial rotatable connection and an external body. The inner sheath is connected to the outer body, and the connector is used to rotate and snap the inner sheath. The inner sheath is provided with a vertically arranged water inlet channel; The external body is provided with a docking water inlet channel that docks with the water inlet channel of the inner sheath.

5. A tumor removal device according to claim 4, characterized in that: The lower end of the inner sheath is provided with a rotating snap ring and a positioning protrusion arranged vertically. The external body has a positioning groove for longitudinally inserting the positioning protrusion; The connector is provided with a slot structure for longitudinally inserting the rotating snap ring and rotating it into place.

6. A tumor removal device according to claim 5, characterized in that: The slot structure includes an upper limit protrusion and a lower limit protrusion arranged at the top and bottom, and the gap between the upper limit protrusion and the lower limit protrusion is the limiting area for rotating and engaging the rotating snap ring. The external body is provided with a main body positioning point, and the connector is connected to a rotating rod and a connector positioning point. When the connector positioning point is set vertically to correspond with the main body positioning point, the inner sheath is inserted longitudinally into the connector and abuts against the connector. At this time, the rotating locking ring is located on the periphery of the area between the upper limit protrusion and the lower limit protrusion. By rotating the connector, the rotating locking ring is locked between the upper limit protrusion and the lower limit protrusion.

7. A tumor removal device according to claim 5, characterized in that: The inner sheath has a hollow negative pressure channel that mates with the opening groove; The external body has a negative pressure suction port, which is connected to the hollow negative pressure channel.

8. A tumor removal device according to claim 1, characterized in that: The inner bag is provided with an upper opening and a lower opening, and the upper opening of the inner bag is connected to the top outer contour of the opening groove. The lower opening of the inner bag is connected to the bottom of the opening groove; The inner bag has a vertically arranged strip opening on its outer circumference that connects to the upper opening and the lower opening, with the strip opening serving as the opening of the inner bag. The left and right connecting lines are threaded through the left and right ends of the inner bag opening; The top of the left connecting line is fixedly connected to the top left side of the opening of the inner bag, and the top of the right connecting line is fixedly connected to the top right side of the opening of the inner bag.

9. A tumor removal device according to claim 1, characterized in that: The bag opening tightening mechanism includes a bag opening lateral closing push-pull rod and a bag opening longitudinal closing push-pull rod. The bag opening lateral closing push-pull rod includes an end limiting ring, a connecting post, and a first pull rod arranged sequentially from top to bottom along the axial direction. The end limiting ring has an oval hole for connecting lines to pass through side by side on the left and right sides of the bag opening, and the length direction of the end limiting ring is the front-back direction; Two connecting posts are provided. The two connecting posts are connected to both ends of the end limiting ring in the length direction. The two connecting posts connect the end limiting ring and the first pull rod, and form an opening for the lateral lead-out of the connecting line. The longitudinal closing push-pull rod of the bag opening is located in front of or behind the first pull rod; The connecting line on the left side of the bag opening passes through the oval hole and extends to the right corner formed by the first pull rod and the longitudinal closing push-pull rod of the bag opening; The connecting line on the right side of the bag opening passes through the oval hole and extends to the left to the left corner formed by the first pull rod and the longitudinal closing push-pull rod of the bag opening.

10. A tumor removal device according to claim 1, characterized in that: It also includes an endoscope, which is disposed inside and outside the inner sheath, or the endoscope is disposed side by side with the inner sheath inside the outer sheath.

Images