A positioning device for early digestive tract tumors before endoscopic surgery

Abstract

The present invention relates to the field of medical device technology, and specifically to a positioning device for preoperative endoscopic early-stage digestive tract tumors, comprising an endoscope body and a positioning ring for providing expansion and having a hollow interior, the positioning ring being mounted on the delivery end of the endoscope body; an adjustment component for adjusting the diameter of the positioning ring is provided on one side. The adjustment component comprises a controller, a cross, a first sleeve, a second sleeve and a plurality of support rods, the first sleeve being fixedly connected to the cross intersection of the cross; the second sleeve being sleeved on the first sleeve and slidingly matched with the first sleeve, the outer wall of the second sleeve being hinged with a plurality of connecting rods along its circumference; the ends of the connecting rods away from the second sleeve are hinged with the support rods adjacent thereto. The present invention enables the positioning ring to be dynamically adjusted according to the actual size and shape of the tumor through the flexible movement of each component; and the convenient clamping and marking functions are utilized to help improve the efficiency and accuracy of the operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a positioning device for preoperative early-stage digestive tract tumors under endoscopy. Background Art

[0002] Early digestive tract tumors are small in size, hidden in their location, and are affected by factors such as digestive tract peristalsis and digestive fluid secretion, making it particularly difficult to accurately locate them before surgery. Traditional surgical methods often rely on the surgeon's experience and feel, locating the tumor by direct touch and exploration after opening the abdomen, but this method is not only traumatic and slow to recover, but also has relatively low positioning accuracy.

[0003] With the continuous advancement of endoscopic technology, more and more endoscopic positioning technologies are being used to locate early-stage tumors in the digestive tract. Modern endoscopes are equipped with high-definition cameras that can provide clear real-time images, thereby improving diagnostic accuracy. However, these technologies still have some limitations in practical applications. For example, some positioning devices lack flexibility in design and cannot be adjusted according to the size of the tumor. When faced with tumors of different sizes, these devices may not provide the best positioning effect, thus affecting surgical planning. In addition, some devices cannot fix the tumor during positioning, and the tumor may shift slightly during surgery, which may cause inaccurate positioning.

[0004] In summary, how to solve the problem of inaccurate positioning caused by the lack of flexibility of some existing positioning devices has become a difficult problem that needs to be solved urgently in this field. Therefore, it is necessary to propose a positioning device for preoperative endoscopic early gastrointestinal tumors. Summary of the invention

[0005] To solve the above problems, the present invention provides an endoscopic positioning device for early digestive tract tumors before surgery. Through the flexible movement of various components, the positioning ring can be dynamically adjusted according to the actual size and shape of the tumor; the convenient clamping and marking functions help to improve the efficiency and accuracy of the operation.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a positioning device for preoperative endoscopic early gastrointestinal tumors, including an endoscope body and a positioning ring which is hollow inside and used to provide expansion, the positioning ring being installed at the delivery end of the endoscope body; an adjustment component for adjusting the diameter of the positioning ring is provided on one side of the positioning ring.

[0007] The adjustment assembly includes a controller, a cross, a first sleeve, a second sleeve and a plurality of support rods. The first sleeve is fixedly connected to the cross intersection of the cross; the second sleeve is sleeved on the first sleeve and slidably cooperates with the first sleeve, and the outer wall of the second sleeve is hinged with a plurality of connecting rods along its circumference; one end of the connecting rod away from the second sleeve is hinged to the support rod adjacent to it, and the side of the support rod away from the connecting rod is fixedly connected to the inner side of the positioning ring.

[0008] A channel connected to the positioning ring is opened inside the support rod, and an opening connected to the channel is opened at one end of the support rod away from the cross, and an electromagnetic one-way valve is connected at the opening; the controller is used to control the opening and closing of the electromagnetic one-way valve.

[0009] The positioning ring is connected to a conveying assembly for conveying medical dyes; a driving assembly for driving the second sleeve to slide laterally is arranged inside the first sleeve; a limiting assembly for providing stability for the support rod is arranged on the cross; and a clamping assembly for clamping the tumor is also arranged on the support rod.

[0010] The technical principles of the above scheme are as follows:

[0011] The second sleeve is slid laterally by the driving assembly. Since the outer wall of the second sleeve is hinged with a plurality of connecting rods along its circumference, and the other ends of the connecting rods are hinged with the support rods, the second sleeve will drive the connecting rods to move together during the lateral sliding process. At this time, the design of the limit assembly is used so that the support rod will not be driven to move to the outside of the positioning ring. Instead, through the hinged effect of the support rod and the connecting rod, the support rod will slide with the horizontal end and the vertical end of the cross; when the support rod slides, the positioning ring is opened, and after it is opened to a suitable position, the tumor is clamped by the clamping assembly, and the medical dye is transported to the positioning ring through the conveying assembly. Since the support rod has a channel connected to the positioning ring, the support rod has an opening connected to the passage, and the opening is connected to an electromagnetic one-way valve, the medical dye can be transported to the outside by opening the electromagnetic one-way valve, thereby marking the tumor.

[0012] The above scheme has the following beneficial effects:

[0013] 1. The present invention controls the lateral sliding of the second sleeve through the driving assembly, and utilizes the articulation of the connecting rod and the support rod, so that the positioning ring can be dynamically adjusted according to the actual size and shape of the tumor. The design of the limit assembly can effectively limit the sliding of the support rod along the cross, thereby achieving uniform expansion of the positioning ring. Ensure that the marking point is located at a precise position, and improve the accuracy of diagnosis and treatment.

[0014] 2. After the positioning ring is stretched to a suitable position, the clamping assembly can grasp the edge of the tumor to reduce its movement during the operation. This not only improves the stability of positioning, but also makes the design of the device more flexible and improves the safety and success rate of the operation.

[0015] 3. The present invention utilizes a delivery assembly to deliver medical dyes to the positioning ring. A channel connected to the positioning ring is provided inside the support rod, and an electromagnetic one-way valve is connected to the end opening to ensure that the medical dyes can be accurately released to the outside to mark the tumor. This convenient clamping and marking function helps to improve the efficiency and accuracy of the operation.

[0016] Furthermore, the driving assembly includes a screw rod, a nut seat and a rotating member for rotating the screw rod, and the controller is used to control the rotating member to rotate, and the rotating member is fixedly connected to a side of the cross away from the first sleeve.

[0017] The screw rod is located in the first sleeve and is rotatably matched with the first sleeve. One end of the screw rod is coaxially fixedly connected to the output shaft of the rotating part, and the other end of the screw rod extends to the outside of the first sleeve and is fixedly connected with a stopper; the nut seat is threadedly matched with the outer wall of the screw rod outside the first sleeve, and the nut seat is fixedly connected to the end of the second sleeve away from the cross.

[0018] Beneficial effect: The screw rod is driven to rotate by the rotating member. Since the screw rod outside the first sleeve is threaded with a nut seat, and the nut seat is fixedly connected to the second sleeve, when the screw rod rotates, the nut seat can move along the axial direction of the screw rod, and when the nut seat moves, it drives the second sleeve to slide horizontally. Through the precise control of the screw rod and the nut seat, the second sleeve can be located outside the first sleeve for precise movement, further improving the positioning accuracy.

[0019] Furthermore, the limiting assembly includes a number of sliders, and the cross is provided with sliding grooves along its circumference, and the sliders are slidably fitted in the sliding grooves; the sliders are fixedly connected to the support rods adjacent to them, and the side of the sliders away from the support rods is fixedly connected with a blocking block, and the width of the support rods and the blocking block is greater than the width of the sliding groove.

[0020] Beneficial effect: The design of the slider and the slide groove enables the support rod to be precisely matched with the horizontal end and the vertical end of the cross, and the design of the card block prevents the support rod from being pulled out when the support rod moves, so that the support rod only slides with the cross, thereby improving the coordination of the device.

[0021] Furthermore, the delivery component includes a pump system for delivering the medical dye, and the controller is used to control the operation of the pump system; the output end of the pump system is communicated with the inside of the positioning ring.

[0022] Beneficial effects: The pump system is used to transport the medical dye, and the output end of the pump system is connected to the inside of the positioning ring, so that the medical dye can directly enter the positioning ring and be delivered to the designated position through the channel inside the support rod. By accurately controlling the start and stop of the pump system, it is ensured that the amount and time of each dye delivery are in line with expectations, thereby improving the accuracy and consistency of the marking.

[0023] Furthermore, the clamping assembly includes a plurality of clamping blocks, and the clamping blocks are all fixedly connected to a side of the support rod away from the positioning ring.

[0024] Beneficial effect: By setting up multiple clamping blocks, it can ensure that the tumor is firmly supported and fixed at multiple points, thereby improving the stability and reliability of clamping.

[0025] Furthermore, the number of connecting rods located on the same plane is at least two.

[0026] Beneficial effects: The design of multiple connecting rods can disperse the load and reduce the pressure on each connection point, thereby helping to reduce the risk of connection point failure and improve the reliability of the connection.

[0027] Furthermore, the positioning ring is made of elastic material, and the elastic material is selected from one or more of silicone rubber, polyurethane, TPE and PEBAX.

[0028] Beneficial effects: The design of the elastic material allows the size of the positioning ring to be adjusted, and can be dynamically adjusted according to the specific size and shape of the tumor to ensure that the marking point is located at a precise position.

[0029] Furthermore, the side of the stopper away from the screw rod is arc-shaped, and the arc-shaped surface is designed to reduce friction with the contact surface.

[0030] Beneficial effect: The arc-shaped design can reduce the friction between the block and the inner wall of the digestive tract, so that the device can be stably delivered into the digestive tract.

[0031] Furthermore, the support rod is in a "﹁" shape, and is used to support the positioning ring.

[0032] Beneficial effect: Through the "﹁"-shaped design, the support rod can effectively support the positioning ring, and the positioning ring can be effectively opened through the movement of the mechanical parts.

[0033] Furthermore, the sliding distance of the second sleeve is smaller than the length of the positioning ring and the support rod.

[0034] Beneficial effect: By setting the sliding distance of the second sleeve to be smaller than the length of the positioning ring and the support rod, the support rod drives the clamping block to effectively position the tumor.

[0035] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is an axonometric diagram of the positioning device used before endoscopic early digestive tract tumor surgery of the present invention.

[0037] Figure 2It is a schematic diagram of the installation of the adjustment component of the present invention.

[0038] Figure 3 It is a cross-sectional view of the positioning device used before endoscopic digestive tract early tumor surgery of the present invention.

[0039] The figure marks in the drawings of the specification include: 1, positioning ring; 2, cross; 3, first sleeve; 4, second sleeve; 5, support rod; 6, connecting rod; 7, electromagnetic one-way valve; 8, screw rod; 9, nut seat; 10, rotating motor; 11, stop block; 12, slider; 13, clamping block; 14, clamping block. DETAILED DESCRIPTION

[0040] The following is further described in detail through specific implementation methods:

[0041] Embodiment 1:

[0042] As attached Figure 1-Figure 3 Shown is: a positioning device for preoperative endoscopic early gastrointestinal tumors, including an endoscope body (not shown) and a positioning ring 1 for providing expansion and having a hollow interior. The positioning ring 1 is made of an elastic material, and the elastic material is selected from one or more of silicone rubber, polyurethane, TPE and PEBAX. In this embodiment, the elastic material is silicone rubber.

[0043] The positioning ring 1 is installed at the conveying end of the endoscope body; an adjustment component for adjusting the diameter of the positioning ring 1 is provided on one side.

[0044] The adjustment assembly includes a controller, a cross 2, a first sleeve 3, a second sleeve 4 and a plurality of support rods 5. The first sleeve 3 is fixedly connected to the cross intersection of the cross 2 by screws; the second sleeve 4 is sleeved on the first sleeve 3 and slidably cooperates with the first sleeve 3, and the outer wall of the second sleeve 4 is hinged with a plurality of connecting rods 6 along its circumference; the other ends of the connecting rods 6 are hinged to the adjacent support rods 5, and the other sides of the support rods 5 are fixedly bonded to the inner side of the positioning ring 1.

[0045] The support rods 5 have passages inside them connected to the positioning ring 1 , and the left ends of the support rods 5 have openings connected to the passages, and the openings are connected to electromagnetic one-way valves 7 ; the controller is used to control the opening and closing of the electromagnetic one-way valves 7 .

[0046] The positioning ring 1 is connected to a conveying component for conveying medical dyes; a driving component for driving the second sleeve 4 to slide laterally is arranged inside the first sleeve 3; a limiting component for providing stability for the support rod 5 is arranged on the cross 2; and a clamping component for clamping the tumor is also arranged on the support rod 5.

[0047] Combination Figure 3As shown, the driving assembly includes a screw rod 8, a nut seat 9 and a rotating part for rotating the screw rod 8. In this embodiment, the rotating part is a rotating motor 10. The controller is used to control the rotating motor 10 to rotate. The rotating motor 10 is screw-fixedly connected to the right side of the cross 2.

[0048] The screw rod 8 is located in the first sleeve 3 and is rotatably matched with the first sleeve 3. One end of the screw rod 8 is coaxially fixedly connected to the output shaft of the rotating motor 10, and the other end of the screw rod 8 extends to the outside of the first sleeve 3 and is screw-fixed with a stopper 11; the nut seat 9 is threadedly matched with the outer wall of the screw rod 8 outside the first sleeve 3, and the nut seat 9 is screw-fixedly connected to the left end of the second sleeve 4.

[0049] Specifically, the screw rod 8 is driven to rotate by rotating the motor 10. Since the screw rod 8 outside the first sleeve 3 is threaded with a nut seat 9, and the nut seat 9 is screw-fixedly connected to the second sleeve 4, when the screw rod 8 rotates, the nut seat 9 can move along the axial direction of the screw rod 8, and when the nut seat 9 moves, it drives the second sleeve 4 to slide horizontally. Through the precise control of the screw rod 8 and the nut seat 9, the second sleeve 4 can be located outside the first sleeve 3 and move accurately, further improving the positioning accuracy.

[0050] Combination Figure 2 and Figure 3 As shown, the limit assembly includes a plurality of sliders 12, and the cross 2 is provided with sliding grooves along its circumference, and the sliders 12 are all slidably fitted in the sliding grooves; the sliders 12 are all screw-fixedly connected to the adjacent support rods 5, and the right side of the sliders 12 is screw-fixedly connected to a clamping block 13, and the width of the support rod 5 and the clamping block 13 are both greater than the width of the sliding groove.

[0051] Specifically, the design of the slider 12 and the slide groove enables the support rod 5 to precisely match the horizontal end and the vertical end of the cross 2, and the design of the block 13 prevents the support rod 5 from being pulled out when the support rod 5 moves, so that the support rod 5 only slides with the cross 2, thereby improving the coordination of the device.

[0052] The delivery component includes a pump system for delivering medical dyes. In this embodiment, the pump system uses a water pump, and the controller is used to control the operation of the pump system; the output end of the pump system is connected to the inside of the positioning ring 1.

[0053] Specifically, the medical dye is delivered by a pump system, and the output end of the pump system is connected to the inside of the positioning ring 1, so that the medical dye can directly enter the positioning ring 1 and be delivered to the designated position through the channel inside the support rod 5. By accurately controlling the start and stop of the pump system, it is ensured that the amount and time of each dye delivery are in line with expectations, thereby improving the accuracy and consistency of the marking.

[0054] The clamping assembly includes a plurality of clamping blocks 14, each of which is screwed and fixed to the side of the support rod 5 away from the positioning ring 1. By providing a plurality of clamping blocks 14, the tumor can be stably supported and fixed at multiple points, thereby improving the stability and reliability of the clamping.

[0055] The specific implementation process is as follows: First, the positioning ring 1 is transported into the digestive tract through the endoscope body. When the positioning ring 1 reaches the tumor position, the screw 8 is driven to rotate by the rotating motor 10. When the screw 8 rotates, the nut seat 9 moves axially along the screw 8, and the movement of the nut seat 9 drives the second sleeve 4 to slide horizontally. Since the outer wall of the second sleeve 4 is hinged with a plurality of connecting rods 6 along its circumference, and the other ends of the connecting rods 6 are hinged to the support rods 5, the connecting rods 6 will be driven to move together during the horizontal sliding of the second sleeve 4. At this time, the design of the block 13 is utilized so that the support rod 5 will not be driven to move to the outside of the positioning ring 1. Instead, through the effect of its hinge with the connecting rod 6, the support rod 5 will slide with the horizontal and vertical ends of the cross 2.

[0056] When the support rod 5 slides, the positioning ring 1 is opened to Figure 3 For example, when the nut seat 9 drives the second sleeve 4 to move to the right, the support rod 5 can be gradually expanded to the upper and lower sides through the hinged connecting rod 6, and the positioning ring 1 is supported when expanding; on the contrary, the diameter of the positioning ring 1 can be reduced, and the size of the positioning ring 1 can be adjusted in this way. After being expanded to a suitable position, when the nut seat 9 moves to the left, the support rod 5 can be driven to contract inwardly through the hinged connecting rod 6, and an inward clamping force is generated when contracting. At this time, the clamping block 14 is used to clamp the tumor. When the medical dye is transported into the positioning ring 1 through the pump system, since the support rod 5 has a channel connected to the positioning ring 1, the support rod 5 has an opening connected to the passage, and the opening is connected to the electromagnetic one-way valve 7, the medical dye can be transported to the outside by opening the electromagnetic one-way valve 7, thereby marking the tumor.

[0057] The present invention controls the second sleeve 4 to slide horizontally by rotating the motor 10, and utilizes the hinged effect of the connecting rod 6 and the support rod 5 so that the positioning ring 1 can be dynamically adjusted according to the actual size and shape of the tumor. The design of the slide groove and the block 13 can effectively limit the sliding of the support rod 5 along the cross 2, thereby achieving uniform expansion of the positioning ring 1. Ensure that the marking point is located at a precise position to improve the accuracy of diagnosis and treatment. The design of the telescopic material allows the size of the positioning ring 1 to be adjusted, and can be dynamically adjusted according to the specific size and shape of the tumor, ensuring that the marking point is located at a precise position.

[0058] When the positioning ring 1 is stretched to a suitable position, the clamping block 14 can grasp the edge of the tumor and reduce its movement during the operation. Not only does it improve the stability of positioning, but it also makes the design of the device more flexible and maneuverable, improving the safety and success rate of the operation. The pump system is used to transport medical dyes to the positioning ring 1. The support rod 5 is provided with a channel connected to the positioning ring 1. The end opening is connected to an electromagnetic one-way valve 7 to ensure that the medical dye can be accurately released to the outside to mark the tumor. This convenient clamping and marking function helps to improve the efficiency and accuracy of the operation.

[0059] Embodiment 2:

[0060] As attached Figure 1-Figure 3 As shown, the difference from the above embodiment is that the number of connecting rods 6 located on the same plane is at least two.

[0061] The specific implementation process is as follows: the design of multiple connecting rods 6 can disperse the load and reduce the pressure on each connection point, thereby helping to reduce the risk of connection point failure and improve the reliability of the connection.

[0062] Embodiment 3:

[0063] As attached Figure 1-Figure 3 As shown, the difference from the above embodiment is that the side of the stopper 11 away from the screw rod 8 is arc-shaped, and the arc-shaped surface is designed to reduce friction with the contact surface.

[0064] The specific implementation process is as follows: the arc-shaped design can reduce the friction between the block 11 and the inner wall of the digestive tract, so that the device can be stably delivered into the digestive tract.

[0065] Embodiment 4:

[0066] As attached Figure 1-Figure 3 As shown, the difference from the above embodiment is that the support rod 5 is in a “﹁” shape, and the support rod 5 is used to support the positioning ring 1.

[0067] The specific implementation process is as follows: through the “﹁”-shaped design, the support rod 5 can effectively support the positioning ring 1, and the positioning ring 1 can be effectively opened through the movement of mechanical parts.

[0068] Embodiment 5:

[0069] As attached Figure 1-Figure 3 As shown, the difference from the above embodiment is that the sliding distance of the second sleeve 4 is smaller than the length of the positioning ring 1 and the support rod 5 .

[0070] The specific implementation process is as follows: by setting the sliding distance of the second sleeve 4 to be smaller than the length of the positioning ring 1 and the support rod 5, the support rod 5 drives the clamping block 14 to effectively position the tumor.

[0071] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An endoscopic positioning device for early digestive tract tumors before surgery, comprising an endoscope body, characterized in that: It also includes a positioning ring (1) for providing expansion and having a hollow interior, the positioning ring (1) being mounted on the delivery end of the endoscope body; an adjustment component for adjusting the diameter of the positioning ring (1) is provided on one side; The adjustment component comprises a controller, a cross (2), a first sleeve (3), a second sleeve (4) and a plurality of support rods (5); the first sleeve (3) is fixedly connected to the cross intersection of the cross (2); the second sleeve (4) is sleeved on the first sleeve (3) and slidably matched with the first sleeve (3); the outer wall of the second sleeve (4) is hinged with a plurality of connecting rods (6) along its circumference; one end of the connecting rod (6) away from the second sleeve (4) is hinged to the support rod (5) adjacent thereto, and one side of the support rod (5) away from the connecting rod (6) is fixedly connected to the inner side of the positioning ring (1); A channel connected to the positioning ring (1) is formed inside the support rod (5), and an opening connected to the channel is formed at one end of the support rod (5) away from the cross (2), and the opening is connected to an electromagnetic one-way valve (7); the controller is used to control the opening and closing of the electromagnetic one-way valve (7); The positioning ring (1) is connected to a delivery component for delivering medical dyes; A driving assembly for driving the second sleeve (4) to slide transversely is provided inside the first sleeve (3); The cross (2) is provided with a limiting assembly for providing stability for the support rod (5); The support rod (5) is also provided with a clamping assembly for clamping the tumor.

2. The positioning device for early digestive tract tumors before endoscopic surgery according to claim 1, characterized in that: The driving assembly comprises a screw rod (8), a nut seat (9) and a rotating member for rotating the screw rod (8), the controller is used to control the rotating member to rotate, and the rotating member is fixedly connected to a side of the cross (2) away from the first sleeve (3); The screw rod (8) is located in the first sleeve (3) and is rotatably matched with the first sleeve (3); one end of the screw rod (8) is coaxially fixedly connected to the output shaft of the rotating member, and the other end of the screw rod (8) extends to the outside of the first sleeve (3) and is fixedly connected to a stopper (11); the nut seat (9) is threadedly matched with the outer wall of the screw rod (8) outside the first sleeve (3), and the nut seat (9) is fixedly connected to the end of the second sleeve (4) away from the cross (2).

3. The positioning device for early digestive tract tumors before endoscopic surgery according to claim 2, characterized in that: The limit assembly comprises a plurality of sliders (12), the cross (2) is provided with slide grooves along its circumference, and the sliders (12) are all located in the slide grooves for sliding fit; the sliders (12) are all fixedly connected to the support rods (5) adjacent thereto, and a clamping block (13) is fixedly connected to the side of the slider (12) away from the support rod (5), and the width of the support rod (5) and the clamping block (13) are both greater than the width of the slide groove.

4. The positioning device for early digestive tract tumors before endoscopic surgery according to claim 3, characterized in that: The delivery component comprises a pump system for delivering medical dyes, and a controller is used to control the operation of the pump system; the output end of the pump system is communicated with the interior of the positioning ring (1).

5. The positioning device for early digestive tract tumors before endoscopic surgery according to claim 4, characterized in that: The clamping assembly comprises a plurality of clamping blocks (14), and the clamping blocks (14) are all fixedly connected to a side of the support rod (5) away from the positioning ring (1).

6. The positioning device for early digestive tract tumors before endoscopic surgery according to claim 5, characterized in that: The number of connecting rods (6) located on the same plane is at least two.

7. The positioning device for early digestive tract tumors before endoscopic surgery according to claim 6, characterized in that: The positioning ring (1) is made of elastic material, and the elastic material is selected from one or more of silicone rubber, polyurethane, TPE and PEBAX.

8. The positioning device for preoperative endoscopic early digestive tract tumors according to claim 7, characterized in that: The side of the stopper (11) away from the screw rod (8) is arc-shaped, and the arc-shaped surface is designed to reduce friction with the contact surface.

9. The positioning device for preoperative endoscopic early digestive tract tumors according to claim 8, characterized in that: The support rod (5) is in the shape of a "﹁" character and is used to support the positioning ring (1).

10. The positioning device for early digestive tract tumors before endoscopic surgery according to claim 9, characterized in that: The sliding distance of the second sleeve (4) is smaller than the length of the positioning ring (1) and the support rod (5).

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