A laparoscopic gastrointestinal lifting device

Abstract

This invention provides a laparoscopic gastrointestinal lifting device, comprising an abdominal cannula divided into an outer section and an inner section. The free end of the inner section is rotatably connected to two opposing rotating shafts. Each rotating shaft has a first parallel connector on its outer side, which connects to a second parallel connector parallel to the inner shaft. At least two parallel connecting strips are rotatably connected between the two shafts. The second connector has a push-pull strip extending outwards. A threaded connecting tube is movably connected within the outer section, and a telescopic shaft is movably connected within the inner section. The telescopic shaft is connected to the threaded connecting tube via a connecting shaft. A threaded adjusting shaft, threaded to the threaded connecting tube, is rotatably connected to the outer end of the outer section away from the inner section. This adjusting shaft cannot extend or retract relative to the outer section and has a knob on its outer side. A push-pull drive strip is located between the two rotating shafts on the telescopic shaft, with drive teeth on both sides and transmission teeth meshing with it on the outer side of the rotating shaft. This device allows entry into the abdominal cavity through a trocar, lifting and expanding the gastrointestinal tract, maintaining a stable surgical field, increasing surgical smoothness, and reducing surgical time.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology and relates to a gastrointestinal lifting device for laparoscopy. Background Technology

[0002] In modern general surgery, laparoscopic surgery has become a routine procedure for treating various abdominal diseases due to its significant advantages, such as being minimally invasive, allowing for rapid postoperative recovery, and reducing complications. This technique involves making multiple small incisions in the patient's abdominal wall, inserting a laparoscope and specialized instruments, and performing precise dissection and tissue manipulation within the operating space created by carbon dioxide pneumoperitoneum. However, laparoscopic surgery heavily relies on clear and stable surgical field exposure, especially when involving soft and large hollow organs such as the stomach, small intestine, and colon, where intraoperative field management presents significant challenges.

[0003] Because gastrointestinal tissues have natural peristalsis, a tendency to sag due to gravity, and compliance with pneumoperitoneum pressure, they are prone to collapse, displacement, or covering the target anatomical area during surgery, obscuring critical operative sites. To maintain an effective surgical field, the surgeon or assistant typically needs to manually pull and push the gastrointestinal tract laterally or head-to-tail using standard laparoscopic forceps, non-traumatic forceps, and other general instruments. However, these instruments are not designed for continuous traction, lack a fixed structure and adjustable tension mechanism, and must be continuously held manually to maintain the traction effect. This not only consumes valuable trocar channels and surgical personnel resources, but also causes repeated obstruction of the surgical field due to the difficulty in maintaining consistent traction force and the tendency for the position to slip, forcing the surgeon to frequently interrupt the main operation to adjust the field of vision. This leads to decreased surgical fluency, increased surgeon fatigue, prolonged operation time, and may even increase the risk of collateral damage. Summary of the Invention

[0004] The purpose of this invention is to provide a laparoscopic gastrointestinal lifting device that can be inserted into the abdominal cavity through a puncture cannula to lift and expand the gastrointestinal tract, maintain a stable surgical field of view, increase the smoothness of the operation, and reduce the operation time.

[0005] To solve the above-mentioned technical problems, the present invention provides a laparoscopic gastrointestinal lifting device, including an abdominal cannula. The abdominal cannula includes an outer section and an inner section. The free end of the inner section is rotatably connected to two opposing rotating shafts. Each rotating shaft is perpendicular to the inner section. Each rotating shaft is provided with a first parallel connector outside the inner section. Each first parallel connector is connected to a second parallel connector parallel to it. At least two parallel connecting strips are rotatably connected between each first parallel connector and the corresponding second parallel connector. Each second connector has a push-pull strip at the end away from the abdominal cannula. The outer section is movably connected to a threaded connecting pipe with internal threads, and the inner section is movably connected to a telescopic shaft that cannot rotate relative to its axial direction. A connecting shaft connects the telescopic shaft and the threaded connecting pipe. The end of the outer section away from the inner section is rotatably connected to a threaded adjusting shaft that is threadedly connected to the threaded connecting pipe. The threaded adjusting shaft cannot extend or retract relative to the outer section. A knob is provided on the outside of the outer section. A push-pull drive bar is provided between the two rotating shafts of the telescopic shaft. Drive teeth are provided on both sides of the push-pull drive bar, and transmission teeth that mesh with the drive teeth are provided on the outer side of each rotating shaft.

[0006] By employing the above technical solution, in clinical surgical procedures, when it is necessary to lift the patient's gastrointestinal tract to expose the surgical field, the surgeon first inserts the inner segment of the abdominal cannula into the abdominal cavity through a trocar. At this time, the two push-pull strips are in a retracted state to accommodate the cannula channel. After the inner segment is fully inserted into the abdominal cavity, the surgeon rotates the knob of the outer segment. The knob drives the threaded adjustment shaft to rotate synchronously. Under the action of the threads, the threaded connecting tube moves along the axial direction of the outer segment towards the inner segment, and then pushes the telescopic shaft to slide within the inner segment through the connecting shaft. When the telescopic shaft moves, the push-pull drive strip at its front end extends forward. The drive teeth on both sides of the push-pull drive strip mesh with the transmission teeth on the outer side of the rotating shaft, driving the two rotating shafts to rotate outward around their own axes. When the rotating shafts rotate, the first parallel connecting head drives the parallel connecting strip to move, causing the second parallel connecting head to move away from the abdominal cannula. Finally, the two push-pull strips are pushed outward around the rotating shaft as a fulcrum until the required lifting angle and range are achieved. At this point, the gastrointestinal tissue is stably supported by the push-pull strip, allowing the surgical field to be fully exposed.

[0007] The present invention is further configured such that the open end of the internal segment is provided with a movable notch for the first parallel connector to move.

[0008] The present invention is further configured such that the cross-section of the inner segment is rectangular, and the cross-section of the telescopic shaft is a rectangle that matches the inner segment.

[0009] The present invention is further configured such that a limiting ring is provided outside the outer section of the threaded adjusting shaft, and a plurality of L-shaped limiting hooks are provided at the open end of the outer section, which are circumferentially distributed and rotatably connected with the limiting ring.

[0010] The present invention is further configured such that a baffle is provided on the free end of the push-pull drive bar extending out of the inner section.

[0011] The present invention is further configured such that each first parallel connector is perpendicular to the abdominal cannula.

[0012] Compared with existing technologies, this invention provides a laparoscopic gastrointestinal traction device that achieves precise control of the traction angle through a mechanical transmission structure. It maintains a stable traction state without requiring continuous manual manipulation, effectively freeing up the surgeon's operating space and hands. The device has a compact overall structure and can be inserted into the abdominal cavity through a standard laparoscopic puncture cannula, avoiding the need for additional incisions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial cross-sectional view used to illustrate the internal structure of the present invention; Figure 3 Used to demonstrate the connection between the push-pull drive bar and the drive shaft; Figure 4 Used to display the active gap at the free end of the internal segment.

[0014] The components are as follows: 1. External section; 2. Internal section; 3. Rotating shaft; 4. First parallel connector; 5. Movable notch; 6. Second parallel connector; 7. Parallel connecting strip; 8. Push-pull strip; 9. Threaded connecting pipe; 10. Telescopic shaft; 11. Connecting shaft; 12. Threaded adjusting shaft; 13. Limiting ring; 14. L-shaped limiting hook; 15. Knob; 16. Push-pull drive strip; 17. Baffle. Detailed Implementation

[0015] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of the gastrointestinal lifting device for laparoscopy proposed in this invention. The advantages and features of the invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention. The same or similar reference numerals in the drawings represent the same or similar parts.

[0016] Example, refer to Figure 1-4A laparoscopic gastrointestinal lifting device includes an abdominal cannula comprising an outer segment 1 and an inner segment 2. Two opposing rotating shafts 3 are rotatably connected to the free end of the inner segment 2. Each rotating shaft 3 is perpendicular to the inner segment 2. A first parallel connector 4 is provided on the outside of each rotating shaft 3 outside the inner segment 2. Each first parallel connector 4 is perpendicular to the abdominal cannula. An movable notch 5 is provided at the open end of the inner segment 2 for the first parallel connector 4 to move freely outward. Each first parallel connector 4 is connected to a second parallel connector 6 parallel to it. Two parallel connecting strips 7 are rotatably connected between each first parallel connector 4 and the corresponding second parallel connector 6. A push-pull strip 8 is provided outward at the end of each second connector away from the abdominal cannula. Through the connection of the two parallel connecting strips 7, the push-pull strip 8 remains parallel to the abdominal cannula during the opening process.

[0017] An internally threaded connecting pipe 9 is movably connected to the outer section 1. An internally threaded telescopic shaft 10 is movably connected to the inner section 2. The cross-section of the inner section 2 is rectangular, and the cross-section of the telescopic shaft 10 is also rectangular, matching the inner section 2, preventing the telescopic shaft 10 from rotating axially relative to the inner section 2. A connecting shaft 11 connects the telescopic shaft 10 and the internally threaded connecting pipe 9. A threaded adjusting shaft 12, threadedly connected to the internally threaded connecting pipe 9, is rotatably connected to the outer end of the outer section 1. A limiting ring 13 is provided around the outer section 1. Multiple L-shaped limiting hooks 14, circumferentially distributed and rotatably connected to the limiting ring 13, are provided at the open end of the outer section 1, preventing the threaded adjusting shaft 12 from extending or retracting relative to the outer section 1. A knob 15 is provided around the outer end of the threaded adjusting shaft 12. A push-pull drive bar 16 is provided between the two rotating shafts 3 of the telescopic shaft 10. Drive teeth are provided on both sides of the push-pull drive bar 16, and transmission teeth that mesh with the drive teeth are provided on the outer side of each rotating shaft 3. The rotation of the threaded adjusting shaft 12 can drive the threaded connecting pipe 9 to extend and retract. After the push-pull drive bar 16 extends and retracts, the drive teeth and transmission teeth mesh to drive the rotating shaft 3 to rotate, and finally drive the two push-pull bars 8 to open outward. A baffle 17 is provided on the free end of the push-pull drive bar 16 extending out of the inner section 2.

[0018] Working principle: In clinical surgical procedures, when it is necessary to pull the patient's stomach and intestines to expose the surgical field, the surgeon first inserts the inner segment 2 of the abdominal cannula into the abdominal cavity through the puncture cannula. At this time, the two push-pull strips 8 are in a retracted state to accommodate the cannula channel. After the inner segment 2 is fully inserted into the abdominal cavity, the surgeon rotates the knob 15 of the outer segment 1. The knob 15 drives the threaded adjustment shaft 12 to rotate synchronously. The threaded connecting tube 9 moves along the axis of the outer segment 1 towards the inner segment 2 under the action of the thread, and then pushes the telescopic shaft 10 to slide within the inner segment 2 through the connecting shaft 11. When the telescopic shaft 10 moves, the push-pull drive strip 16 at its front end extends forward. The drive teeth on both sides of the push-pull drive strip 16 mesh with the transmission teeth on the outer side of the rotating shaft 3, driving the two rotating shafts 3 to rotate outward around their own axes respectively. When the rotating shaft 3 rotates, the first parallel connecting head 4 drives the parallel connecting strip 7 to move, causing the second parallel connecting head 6 to move away from the abdominal cannula. This ultimately pushes the two push-pull strips 8 outwards around the rotating shaft 3 until the desired lifting angle and range are achieved. At this point, the gastrointestinal tissue is stably supported by the push-pull strips 8, allowing for full exposure of the surgical field. During the surgery, if adjustments to the lifting force or angle are needed, the surgeon can fine-tune the degree of expansion of the push-pull strips 8 by rotating the knob 15 in either the forward or reverse direction, ensuring a consistently clear field of vision. After the surgery, rotating the knob 15 in the reverse direction causes the threaded connecting tube 9 to retract the telescopic shaft 10 and the push-pull drive strip 16. The drive teeth and transmission teeth mesh in opposite directions, resetting the rotating shaft 3 and retracting the push-pull strips 8, allowing the device to be removed from the abdominal cavity. This device achieves stable expansion and adjustment of the push-pull strips 8 through mechanical transmission, eliminating the need for continuous manual control. This effectively saves surgical personnel resources and avoids the problems of unstable force and easy slippage associated with traditional instruments, significantly improving the smoothness and safety of the surgical procedure.

[0019] It should also be noted that all terms such as "set up" and similar descriptive words in this application (especially the specification) indicate that two structures have or exist a connection relationship. However, the specific means by which the two are connected are not limited in detail, and are usually conventional connection methods. That is, the means should be understood as prior art and do not need to be elaborated. For example, "m is set up with n" only indicates that structure m has structure n, and whether the two are connected by welding, riveting, adhesive, or integral molding is within the scope of protection of this application. Similarly, "x is rotatably set up with y" only indicates that y and x can rotate relative to each other, and whether the two are connected by a bearing, or whether y directly passes through x and is rotatably connected to x, or other feasible methods, are all within the scope of protection of this application.

[0020] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A laparoscopic gastrointestinal lifting device, comprising an abdominal cannula, characterized in that, The abdominal cannula includes an outer section (1) and an inner section (2). The free end of the inner section (2) is rotatably connected to two opposing rotating shafts (3). Each rotating shaft (3) is perpendicular to the inner section (2). Each rotating shaft (3) is provided with a first parallel connector (4) outside the inner section (2). Each first parallel connector (4) is connected to a second parallel connector (6) parallel to it. At least two parallel connecting strips (7) are rotatably connected between each first parallel connector (4) and the corresponding second parallel connector (6). Each second connector is provided with a push-pull strip (8) at the end away from the abdominal cannula. The outer section (1) is movably connected to a threaded connecting pipe (9) with internal threads. The inner section (2) is movably connected to a telescopic shaft (10) that cannot rotate relative to its axial direction. A connecting shaft (11) is connected between the telescopic shaft (10) and the threaded connecting pipe (9). The end of the outer section (1) away from the inner section (2) is rotatably connected to a threaded adjusting shaft (12) that is threadedly connected to the threaded connecting pipe (9). The threaded adjusting shaft (12) cannot extend or retract relative to the outer section (1). A knob (15) is provided on the outside of the outer section (1). A push-pull drive bar (16) is provided between the two rotating shafts (3) of the telescopic shaft (10). Drive teeth are provided on both sides of the push-pull drive bar (16). Transmission teeth that mesh with the drive teeth are provided on the outer side of each rotating shaft (3).

2. The laparoscopic gastrointestinal lifting device according to claim 1, characterized in that, The open end of the inner segment (2) is provided with an movable notch (5) for the first parallel connector (4) to move.

3. The laparoscopic gastrointestinal lifting device according to claim 1, characterized in that, The cross-section of the inner segment (2) is rectangular, and the cross-section of the telescopic shaft (10) is a rectangle that matches the inner segment (2).

4. The laparoscopic gastrointestinal lifting device according to claim 1, characterized in that, The threaded adjusting shaft (12) is provided with a limiting ring (13) outside the outer section (1), and the open end of the outer section (1) is provided with a plurality of L-shaped limiting hooks (14) that are circumferentially distributed and rotatably connected to the limiting ring (13).

5. The laparoscopic gastrointestinal lifting device according to claim 1, characterized in that, The free end of the push-pull drive bar (16) extends out of the inner section (2) and is provided with a baffle (17).

6. The laparoscopic gastrointestinal lifting device according to claim 1, characterized in that, Each first parallel connector (4) is perpendicular to the abdominal cannula.

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