Retractor device for kidney transplantation surgery

Abstract

The application provides a retractor for kidney transplantation surgery and relates to the technical field of medical auxiliary devices.The retractor comprises a retractor assembly and control pliers for controlling the opening and closing of the retractor assembly.The control pliers comprise two plier heads, and the retractor assembly comprises two retractor parts connected to the corresponding plier heads respectively.Two sets of the retractor assembly and the control pliers are symmetrically arranged, and a first driving device is arranged between the two sets of control pliers to maintain and / or adjust the distance between the two control pliers.A second driving device is arranged inside the control pliers to adjust the opening and closing angle of the control pliers.Both the first driving device and the second driving device are hydraulic telescopic elements.The application greatly improves the efficiency of the surgery and shortens the surgery time.In the process of the surgery, the surgery posture of the patient and the related equipment can be greatly adjusted without the need for secondary traction positioning, and the normal performance of the surgery is not affected by the great change of the surgery window.

Description

Technical Field

[0001] This invention relates to the field of medical auxiliary device technology, and in particular to a retraction device for kidney transplant surgery. Background Technology

[0002] Kidney transplantation is an open surgery that requires creating a large surgical window in the patient's abdomen to transplant a healthy kidney.

[0003] During kidney transplantation surgery, an adjustable surgical incision is made in the patient's abdomen. Then, a retraction device applies forces in different directions to the surgical incision to create a surgical window to facilitate the operation. Existing retraction devices typically include an L-shaped retraction frame. One bent side of the retraction frame extends into the surgical incision to pull it, while the other side of the retraction frame is fixed to the operating table by a ratchet structure or other mechanical locking structure to ensure the stability of the surgical incision retraction.

[0004] Because kidney transplantation surgery requires a large surgical incision, creating a larger surgical window necessitates the use of multiple retractors at different angles. This requires skilled surgeons to perform locking operations individually or simultaneously from different angles, which consumes considerable surgical time and impacts the patient's anesthesia and subsequent transplantation procedures. Furthermore, existing retractors are typically connected to the operating table, requiring the patient and retractors to remain in a relatively stable state during surgery. This makes it difficult to adjust the patient's surgical posture and related equipment, placing even higher demands on the surgeon. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a retraction device for kidney transplant surgery. This invention greatly improves surgical efficiency and shortens surgical time. Furthermore, during the surgery, the patient's surgical posture and related equipment can be significantly adjusted without the need for secondary traction positioning. At the same time, there is no need to worry about significant changes in the surgical window affecting the normal progress of the surgery.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0007] A retraction device for kidney transplant surgery includes a retraction assembly and control clamps for controlling the opening and closing of the retraction assembly. The control clamps include two clamp heads, and the retraction assembly includes two retraction portions respectively connected to the corresponding clamp heads. Two sets of the retraction assembly and control clamps are symmetrically arranged. A first driving device is provided between the two sets of control clamps to maintain and / or adjust the distance between the two control clamps. A second driving device is provided inside each control clamp to adjust the opening and closing angle of the control clamps. Both the first and second driving devices are hydraulic telescopic elements. The first driving device is detachably connected to the two control clamps, and the second driving device is non-detachably connected to the corresponding control clamp. After the two control clamps are maintained at a predetermined opening angle by the first driving device, the first driving device is removed.

[0008] Preferably, the horizontal cross-section of the retracting part is an arc shape with the convex surface facing outward, the outer surface of the retracting part is provided with a friction surface and a smooth surface, and the upper end of the retracting part is rotatably connected to the corresponding clamp head through a control shaft.

[0009] Preferably, the upper end of the control shaft passes through the corresponding clamp head and is connected to a deflection device. The first drive device is disposed between the two deflection devices. The first drive device extends to control the deflection device, driving the control shaft and the retraction part to deflect at a predetermined angle, controlling the smooth surface to be opposite to the inner wall of the skin incision.

[0010] Preferably, the deflection device includes two drive rods that are fixedly connected to corresponding control shafts, and the upper end of the drive rods has a positioning opening adapted to the first drive device.

[0011] Preferably, the first driving device includes two positioning bases, each positioning base including a positioning plate and a positioning bolt, the positioning bolt being U-shaped, and a first hydraulic telescopic rod being disposed between the two positioning plates, the first hydraulic telescopic rod being externally connected to a first pumping device.

[0012] Preferably, the telescopic end of the first hydraulic telescopic rod is further provided with a threaded telescopic component, which includes a threaded sleeve, a threaded rod, and a nut sleeved on the outside of the threaded rod, wherein the nut is rotatably connected to the threaded sleeve.

[0013] Preferably, the two drive rods are located on different horizontal planes, and the positioning openings of the two drive rods are opposite each other to form a positioning area. The horizontal cross-sectional dimension of the positioning bolt is smaller than the horizontal cross-sectional dimension of the positioning area.

[0014] Preferably, the control clamp further includes clamp handles and a rotating joint, and the second drive device is disposed between the two clamp handles.

[0015] Preferably, the second drive device includes a second hydraulic telescopic rod connected to an external second pumping device, and the telescopic end of the second hydraulic telescopic rod is connected to an opposite clamp via a connecting base.

[0016] Preferably, a rigid positioning assembly is further provided between the two control clamps. The positioning assembly includes a positioning rod and positioning heads located on both sides of the positioning rod. The positioning heads are detachably connected to the two clamp heads on the same side.

[0017] The beneficial effects of this invention are as follows:

[0018] Compared with existing technologies, the above structural design allows for rapid adjustment and limitation of the lateral and longitudinal positions of the four retraction parts via the second and first driving devices. This enables the rapid formation of a surgical window on the patient's skin surface for surgery, and the hydraulic adjustment method is more efficient and convenient. After the control forceps have stabilized, the first driving device can be removed to prevent it from forming an obstruction, further facilitating the normal conduct of the kidney transplant surgery, greatly improving surgical efficiency and shortening the operation time. Furthermore, the patient's surgical posture and related equipment can be significantly adjusted during the operation without the need for secondary traction positioning, and there is no need to worry about significant changes in the surgical window affecting the normal conduct of the surgery. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the usage state of the present invention (the curved rectangle represents the surgical window).

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 3 For the present invention Figure 2 A side view structural diagram.

[0022] Figure 4 For the present invention Figure 2 A schematic diagram of the main structure.

[0023] Figure 5 For the present invention Figure 2 A schematic diagram of the structure viewed from below.

[0024] Figure 6 For the present invention Figure 2 A top-view structural diagram.

[0025] Figure 7 This is a three-dimensional structural diagram of the control clamp, the pull-away assembly, and the deflection device of the present invention.

[0026] Figure 8 This is a three-dimensional structural diagram of the first driving device of the present invention.

[0027] Figure 9 For the present invention Figure 5 A magnified structural diagram at point A.

[0028] In the diagram: 100, Patient's skin; 110, Skin incision; 200, Second drive device; 210, Second hydraulic telescopic rod; 211, Pump connector; 220, Connecting base; 300, Control clamp; 310, Clamp head; 320, Rotating joint; 330, Clamp handle; 400, Retraction assembly; 410, Control shaft; 411, Positioning notch; 420, Retraction part; 421, Friction surface; 422, Smooth surface; 500, Deflection device; 510, Drive rod; 511, Positioning opening; 600, First drive device; 610, Positioning base; 611, Positioning plate; 612, Positioning bolt; 620, First hydraulic telescopic rod; 630, Threaded telescopic component; 631, Threaded sleeve; 632, Nut; 633, Threaded rod; 700, Positioning assembly; 710, Positioning head; 720, Positioning rod. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] To address the problems mentioned in the background art, see Appendix Figure 1 - Appendix Figure 9 A retraction device for kidney transplantation surgery includes a retraction component 400 and a control clamp 300 for controlling the opening and closing of the retraction component. The control clamp 300 includes two clamp heads 310, and the retraction component 400 includes two retraction parts 420 respectively connected to the corresponding clamp heads 310. By controlling the two control clamps 300, the retraction parts 420 are opened, and the retraction parts 420 can be positioned at different locations to open the skin incision 110 on the surface of the patient's skin 100 to form a surgical window, which facilitates kidney transplantation surgery.

[0031] This article uses kidney transplantation surgery as an example, but the relevant description does not constitute a limitation on the technical solution of this application.

[0032] Two sets of symmetrically arranged pull-away components 400 and control clamps 300 are provided. A first drive device 600 is provided between the two sets of control clamps 300 to maintain and / or adjust the distance between the two control clamps 300. When the control clamps 300 are initially positioned accurately, the first drive device 600 is adjusted to limit the control clamps on both sides to maintain accurate position. When the control clamps 300 are initially unstable and are in the middle position for easy insertion, the first drive device 600 is controlled to extend, driving the two control clamps 300 to move outward and away from each other.

[0033] The control clamp 300 is equipped with a second drive device 200 for adjusting the opening and closing angle of the control clamp 300; the distance between the two control clamps 300 can be adjusted by the first drive device 600, and the opening and closing angle of the two control clamps 300 can be adjusted by the second drive device 200, thereby controlling the distance between the two retraction parts 420 at the lower end of the same control clamp 300. The four retraction parts 420 can be located in four positions respectively, forming a near-rectangular surgical window, and the upper part of the surgical window is unobstructed, which facilitates the surgical operation and transplantation operation during the kidney transplantation surgery.

[0034] The first drive device 600 and the second drive device 200 are both hydraulic telescopic elements. The first drive device 600 and the second drive device 200 are both controlled by hydraulic extension and retraction. The first drive device 600 is detachably connected to the two control clamps 300, and the second drive device 200 is not detachably connected to the corresponding control clamp 300. After the two control clamps 300 are maintained at a predetermined angle by the first drive device 600, the first drive device 600 is removed.

[0035] During the process of retracting the skin incision 110, two control clamps 300 are first placed symmetrically on both sides of the skin incision 110. The control clamps 300 are used to control the two retraction parts 420 to be in close proximity and to insert the two close-fitting retraction parts 420 into the skin incision 110. Since the retraction parts 420 and the control clamps 300 are located in different horizontal planes, the retraction parts 420 penetrate deep into the skin incision 110, and the control clamps 300 are positioned on the surface of the patient's skin 100.

[0036] After the two control clamps 300 and the retraction part 420 are placed, the length of the first drive device 600 is adjusted and the first drive device 600 is installed between the two control clamps 300. The first drive device 600 can limit the length of the skin incision 110 to prevent the control clamps 300 from shifting under pressure after opening, thus ensuring the stability of the surgical window formed by retraction of the skin incision 110.

[0037] After the first driving device 600 is set up, the second driving device 200 adjusts the opening of the control clamp 300. During the opening process of the control clamp 300, the two retraction parts 420 at the lower end of the control clamp 300 move away from each other, and the two retraction parts 420 on both sides open synchronously, ultimately forming a surgical window resembling a rectangle (see attached). Figure 1(In the dotted area); the opening and traction control is achieved through hydraulic pressure, eliminating the need for manual traction and locking by surgical personnel, greatly improving surgical efficiency; at the same time, the distance between the two opening parts 420 can be controlled by adjusting the amount of pumped oil, and the control process is linear and uniform, which can be quickly adjusted and controlled according to the actual situation of the patient's skin incision 110 and the needs of the surgery. Compared with traditional mechanical buckles or other traction locking structures, the control effect is better.

[0038] Furthermore, through the above structural design, the control clamp 300 and the retraction component 400 do not need to be rigidly connected to other structures. During the operation, the patient's surgical posture and related equipment can be adjusted significantly without the need for secondary traction positioning. At the same time, there is no need to worry about significant changes in the surgical window affecting the normal progress of the operation.

[0039] After the two control clamps 300 pull the retraction part 420 to the predetermined position, the two second drive devices 200 are closed. During the operation, the position and extension length of the second drive devices 200 are kept stable to ensure the stability of the surgical window. After the control clamps 300 are opened, the whole is in a relatively stable state. Then the first drive device 600 is appropriately retracted and removed to avoid the first drive device 600 affecting the operation due to its position directly above the surgical window. This allows for the formation of a larger window and ensures the convenient and efficient performance of kidney transplantation.

[0040] In summary, through the above structural design, the second drive device 200 and the first drive device 600 can quickly adjust and limit the lateral and longitudinal positions of the four retraction parts 420, enabling the rapid formation of a surgical window on the patient's skin 100 for surgery. The hydraulic adjustment method is more efficient and convenient. After the control clamp 300 is opened and stabilized, the first drive device 600 can be removed to prevent it from forming an obstruction structure, further facilitating the normal conduct of the kidney transplant surgery, greatly improving the efficiency of the surgery and shortening the operation time. Furthermore, during the operation, the patient's surgical posture and related equipment can be adjusted significantly without the need for secondary traction positioning, and there is no need to worry about significant changes in the surgical window affecting the normal conduct of the surgery.

[0041] Furthermore, the horizontal cross-section of the retracting part 420 is an arc shape with the convex surface facing outward. The outer surface of the retracting part 420 is provided with a friction surface 421 and a smooth surface 422. The retracting part 420 can be made of different materials to change the friction coefficient of the surface of the retracting part 420. Friction strips can also be provided on the surface of the retracting part 420 to increase the friction coefficient. There is a vertical dividing line between the friction surface 421 and the smooth surface 422. The upper end of the retracting part 420 is rotatably connected to the corresponding clamp head 310 through a control shaft 410.

[0042] By rotating the control shaft 410, the retraction part 420 can be adjusted to different angles, controlling the friction surface 421 and the smooth surface 422 to contact the inner wall of the skin incision 110 respectively. When the smooth surface 422 contacts the inner wall of the skin incision 110, it is easy to adjust the control clamp 300 and the retraction assembly 400 to move along the length of the skin incision 110, thereby adjusting the surgical window. By controlling the friction surface 421 to be opposite to the inner wall of the skin incision 110, the resistance of the retraction part 420 is increased by increasing friction, ensuring the stability of the retraction part 420 during the operation, preventing the retraction assembly 400 from shifting its position during the operation, ensuring that the size of the surgical window is maintained at the normal surgical size, and avoiding any impact on the surgical process.

[0043] Furthermore, a corresponding clamp head 310 is passed through the upper end of the control shaft 410 and connected to a deflection device 500. The deflection device 500 can adjust the deflection angle of the control shaft 410. During the deflection of the control shaft 410, the retraction part 420 below is driven to rotate synchronously. The first drive device 600 is disposed between the two deflection devices 500. The first drive device 600 extends to control the deflection device 500 to drive the control shaft 410 and the retraction part 420 to deflect by a predetermined angle, so that the smooth surface 422 is opposite to the inner wall of the skin incision 110.

[0044] Through the above structural design, during the extension of the first driving device 600, the retraction part 420 can be deflected first to make the smooth surface 422 face the inner wall of the skin incision 110, reducing resistance. At the same time, as the first driving device 600 continues to extend, it can push the control clamps 300 and the retraction component 400 on both sides to move outward, and can move to both sides along the length of the skin incision 110, ultimately forming a larger surgical window to facilitate the kidney transplantation surgery. Moreover, during the outward movement of the control clamps 300 and the retraction component 400, the smooth surface 422 is facing the skin incision 110, which can be in a low-friction state, making it easier for the control clamps 300 and the retraction component 400 to move to both sides to form a larger surgical window. The low resistance during the movement ensures the smooth and stable movement of the control clamps 300 and the retraction component 400.

[0045] Here, a torsion spring can be installed between the control shaft 410 and the forceps head 310. Under the action of the torsion spring, the control shaft 410 is normally in the first position, that is, the friction surface 421 side is normally opposite to the inner wall of the skin incision 110, and is in a state of high friction. After the first drive device 600 retracts and removes, under the action of the torsion spring, the control shaft 410 can drive the retraction part 420 to automatically deflect to the side of the friction surface 421 with high friction, automatically increasing the friction resistance and ensuring the stability of the control forceps 300 on both sides and the retraction component 400. The above action process is performed automatically without the need for adjustment by the surgeon. It is normally in a high friction state, which further ensures the stability of the overall structure during the operation.

[0046] Specifically, the deflection device 500 includes two drive rods 510 that are fixedly connected to the corresponding control shafts 410. The upper end of the drive rod 510 has a positioning opening 511 that is adapted to the first drive device 600. The positioning opening 511 can be adapted to both sides of the first drive device 600, and can position both sides of the first drive device 600 to ensure that the first drive device 600 can be normally supported and extended, to ensure the stability of the connection of the first drive device 600, and to ensure the stability of the state of the control clamps 300 and the pulling component 400 on both sides.

[0047] Both drive rods 510 extend toward the other clamp head 310. The two drive rods 510 partially overlap, and the two positioning openings 511 overlap to form a positioning area for connection and positioning on both sides of the first drive device 600.

[0048] Specifically, the first driving device 600 includes two positioning bases 610, each positioning base 610 including a positioning plate 611 and a positioning bolt 612. The positioning bolt 612 is U-shaped, and a first hydraulic telescopic rod 620 is provided between the two positioning plates 611. The first hydraulic telescopic rod 620 is externally connected to a first pumping device.

[0049] During the extension of the first drive device 600, control oil is pumped into the first hydraulic telescopic rod 620 through the first pumping device to control the extension of the first hydraulic telescopic rod 620. During the initial positioning process, the U-shaped positioning bolt 612 is inserted into the corresponding positioning area with its opening facing outward to achieve a limit. The first drive device 600 extends in the limited state on both sides, which can drive the four drive rods 510 on both sides to deflect inward synchronously, and finally drive the lower control shaft 410 and the pulling part 420 to deflect, thereby realizing the adjustment and switching of the position of the friction surface 421 and the smooth surface 422.

[0050] The positioning bolt 612 here is designed in a U-shape and is inverted during installation. The first hydraulic telescopic rod 620 can be positioned in a relatively horizontal position with the four drive rods 510 on both sides. At the same time, the positioning bolt 612 and the positioning plate 611 are made of rigid materials, which can prevent the positioning bolt 612 from deflecting too much during the process of being stressed. This ensures that the drive rods 510 on both sides can deflect normally while reducing the requirements for the rigidity and strength of the related structures.

[0051] Furthermore, the telescopic end of the first hydraulic telescopic rod 620 is also provided with a threaded telescopic component 630. The threaded telescopic component 630 includes a threaded sleeve 631, a threaded rod 633, and a nut 632 sleeved on the outside of the threaded rod 633. The nut 632 is rotatably connected to the threaded sleeve 631. By rotating the nut 632, the distance between the threaded rod 633 and the threaded sleeve 631 can be adjusted, thereby adjusting the overall length of the threaded telescopic component 630. Here, the threaded telescopic component 630 is adjusted according to the actual length of the skin incision 110, and the nut 632 and the threaded rod 633 are self-locking under normal conditions, maintaining relative stability. Through the above structural design, the threaded telescopic component 630 can be adaptively adjusted according to the length of different skin incisions 110, meeting the requirements for different surgical incision sizes and improving the adaptability of the overall structure.

[0052] Specifically, the two drive rods 510 are located on different horizontal planes, and the positioning openings 511 of the two drive rods 510 together form a positioning area. The horizontal cross-sectional dimension of the positioning bolt 612 is smaller than the horizontal cross-sectional dimension of the positioning area. Through the above structural design, during the extension of the first hydraulic telescopic rod 620, the positioning bolt 612 can abut against the outer side of the positioning area, thereby pushing the two drive rods 510 to deflect outwards synchronously, realizing adjustment control. After the control clamp 300 and the retraction assembly 400 are locked, the first hydraulic telescopic rod 620 is controlled to retract appropriately, and the positioning bolt 612 is controlled to be in a non-contact state with the two positioning openings 511. An upward force is applied to the first drive device 600 as a whole to pull out the first drive device 600 as a whole, thereby avoiding the first drive device 600 from blocking the outside of the surgical window and facilitating the normal performance of the kidney transplant surgery.

[0053] Specifically, the control clamp 300 also includes clamp handles 330 and a rotating joint 320. The second drive device 200 is disposed between the two clamp handles 330. The clamp handles 330 are integrally formed with the clamp heads 310 on the opposite side. The two clamp handles 330 are rotatably connected by the rotating joint 320. The second drive device 200 is located between the two clamp handles 330 to control the opening and closing of the two clamp handles 330, thereby adjusting and controlling the opening and closing angle of the two clamp heads 310. The clamp handles 330 can be designed to be relatively long. The rotating joint 320 here can act as a fulcrum. The clamp handles 330 can amplify the displacement driving force of the second drive device 200 to ensure the stability of the two clamp heads 310 during the subsequent traction process of driving the corresponding traction component 400.

[0054] The second drive device 200 includes a second hydraulic telescopic rod 210 connected to an external second pumping device. The telescopic end of the second hydraulic telescopic rod 210 is connected to the corresponding clamp 330 via a connecting base 220. The connecting base 220 and the corresponding clamp 330 are movably or slidably connected. The second hydraulic telescopic rod 210 can be fixedly connected to the side wall of the other clamp 330. When control oil is pumped into the second hydraulic telescopic rod 210, it can push the second hydraulic telescopic rod 210 to extend, controlling the two clamps 330 to move away from each other while driving the two outer clamp heads. 310 moves away synchronously, enabling convenient drive control; simultaneously, after the second hydraulic telescopic rod 210 has extended and stabilized, the skin incision 110, under the action of elasticity, can push the two clamp heads 310 to have a tendency to retract. This force is transmitted to both sides of the second hydraulic telescopic rod 210 through the clamp handles 330. The two clamp handles 330 can clamp and limit the second hydraulic telescopic rod 210. During the operation, the second hydraulic telescopic rod 210 can be located between the two clamp handles 330 in a stable support state, ensuring the stability of the position of the control clamp 300 and the retraction component 400.

[0055] The second hydraulic telescopic rod 210 here is connected to the second pumping equipment through the pumping connector 211. A valve can be installed in the pumping connector 211. After the control clamp 300 is in a stable state after opening, the valve in the pumping connector 211 is closed to prevent the control oil from flowing out of the second hydraulic telescopic rod 210 and to ensure the stability of the extended state of the second hydraulic telescopic rod 210.

[0056] A rigid positioning component 700 is also provided between the two control clamps 300. By setting the positioning component 700, the two symmetrically arranged control clamps 300 can be limited to prevent the two control clamps 300 from moving along the length of the skin incision 110 during the operation, and further ensure the stability after the surgical window is formed.

[0057] Specifically, the positioning assembly 700 includes a positioning rod 720 and positioning heads 710 located on both sides of the positioning rod 720. The positioning heads 710 are detachably connected to two clamp heads 310 on the same side. A positioning notch 411 is opened at the upper end of the control shaft 410. Inserting the positioning heads 710 on both sides into the corresponding positioning notches 411 can lock and position the positioning heads 710 on both sides. The positioning heads 710 and the positioning rod 720 can be positioned by bolts or by snap-fit ​​to ensure the stability between the two positioning heads 710 and the positioning rod 720. The positioning heads 710 and the positioning rod 720 as a whole can be limited and stabilized.

[0058] The positioning component 700 is located on the same side of the skin incision 110 and does not cross the surgical window, ensuring the stability of the control clamps 300 on both sides. In cases where the pressure on the skin incision 110 is too high or the friction is insufficient to ensure the stability of the control clamps 300, a set of positioning components 700 can be set on both sides of the control clamps 300 to form a stable rectangular connection structure, further ensuring the stability of the surgical window formed by the control clamps 300 and the retraction component 400 during the operation, and ensuring the normal, stable and efficient performance of the kidney transplant surgery.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A retraction device for kidney transplant surgery, comprising a retraction assembly (400) and a control clamp (300) for controlling the opening and closing of the retraction assembly, characterized in that: The control clamp (300) includes two clamp heads (310), and the retraction assembly (400) includes two retraction parts (420) respectively connected to the corresponding clamp heads (310); the retraction assembly (400) and the control clamp (300) are symmetrically arranged in two sets, and a first drive device (600) is provided between the two sets of control clamps (300) for maintaining and / or adjusting the distance between the two control clamps (300); a second drive device (200) is provided inside the control clamp (300) for adjusting the opening and closing angle of the control clamp (300); the first drive device (600) and the second drive device (200) are both hydraulic telescopic elements; the first drive device (600) is detachably connected to the two control clamps (300), and the second drive device (200) is not detachably connected to the corresponding control clamp (300); Among them, after the two control clamps (300) are kept open at a predetermined angle by the first drive device (600), the first drive device (600) is removed; The horizontal cross section of the retracting part (420) is an arc shape with the convex surface facing outward. The outer surface of the retracting part (420) is provided with a friction surface (421) and a smooth surface (422). The upper end of the retracting part (420) is rotatably connected to the corresponding clamp head (310) through a control shaft (410). The upper end of the control shaft (410) passes through the corresponding clamp head (310) and is connected to a deflection device (500). The first drive device (600) is located between the two deflection devices (500). The first drive device (600) extends the control deflection device (500) to drive the control shaft (410) and the retraction part (420) to deflect at a predetermined angle, so that the smooth surface (422) is opposite to the inner wall of the skin incision (110). A torsion spring is installed between the control shaft and the clamp head. During the extension of the first drive device, the retraction part is first deflected so that the smooth surface is opposite to the inner wall of the skin incision, reducing resistance. Under the action of the torsion spring, the control shaft drives the retraction part to automatically deflect to the side of the friction surface with greater friction, automatically increasing the friction resistance and ensuring the stability of the control clamps on both sides and the retraction assembly.

2. The retraction device for kidney transplantation surgery according to claim 1, characterized in that, The deflection device (500) includes two drive rods (510) that are fixedly connected to the corresponding control shaft (410), and the upper end of the drive rod (510) has a positioning opening (511) adapted to the first drive device (600).

3. The retraction device for kidney transplantation surgery according to claim 2, characterized in that, The first driving device (600) includes two positioning bases (610), each positioning base (610) includes a positioning plate (611) and a positioning bolt (612), the positioning bolt (612) is U-shaped, and a first hydraulic telescopic rod (620) is provided between the two positioning plates (611), the first hydraulic telescopic rod (620) is externally connected to a first pumping device.

4. The retraction device for kidney transplantation surgery according to claim 3, characterized in that, The first hydraulic telescopic rod (620) is also provided with a threaded telescopic component (630) at its telescopic end. The threaded telescopic component (630) includes a threaded sleeve (631), a threaded rod (633), and a nut (632) sleeved on the outside of the threaded rod (633). The nut (632) is rotatably connected to the threaded sleeve (631).

5. The retraction device for kidney transplantation surgery according to claim 3, characterized in that, The two drive rods (510) are located on different horizontal planes, and the positioning openings (511) of the two drive rods (510) together form a positioning area. The horizontal cross-sectional dimension of the positioning bolt (612) is smaller than the horizontal cross-sectional dimension of the positioning area.

6. The retraction device for kidney transplantation surgery according to claim 1, characterized in that, The control clamp (300) also includes clamp handles (330) and a rotating joint (320), with the second drive device (200) disposed between the two clamp handles (330).

7. The retraction device for kidney transplantation surgery according to claim 6, characterized in that, The second drive device (200) includes a second hydraulic telescopic rod (210) connected to an external second pumping device. The telescopic end of the second hydraulic telescopic rod (210) is connected to the opposite clamp (330) via a connecting base (220).

8. A retraction device for kidney transplantation surgery according to any one of claims 1-7, characterized in that, A rigid positioning assembly (700) is also provided between the two control clamps (300). The positioning assembly (700) includes a positioning rod (720) and positioning heads (710) located on both sides of the positioning rod (720). The positioning heads (710) are detachably connected to the two clamp heads (310) on the same side.

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