Adjustable skin stretching device and stretching method

Abstract

The invention relates to the technical field of surgery, in particular to an adjustable skin distractor and a distracting method.The adjustable skin distractor comprises an integration plate and a distracting unit; the stretching unit comprises a sliding block, a sliding assembly, a mounting plate, a kirschner wire, a driving assembly and a locking assembly; sliding columns are arranged on the two sides of the sliding block in the first direction; the movable assembly is used for achieving movement of the sliding block in the second direction, achieving swinging of the sliding block around the axis of the sliding column and achieving four degrees of freedom of lifting, rotating around a vertical shaft, horizontal sliding and swinging around a horizontal shaft of the kirschner wire, so that during initial installation, the kirschner wire of each stretching unit can be independently adjusted to the optimal position and angle, and the operation is convenient. It is ensured that the kirschner wire is inserted in the mode of being perpendicular to the local curved surface of the wound, accurate attachment to the arc-shaped or irregular wound surface is achieved, and the effects that traction force on different positions is consistent, and the traction position is more accurate are achieved.

Description

Technical Field

[0001] This invention relates to surgical techniques and fields, specifically to an adjustable skin traction device and traction method. Background Technology

[0002] With the rapid development of modern medical technology, patients have placed higher demands on wound healing: implanted or covered materials should be lightweight and comfortable, wound healing should be aesthetically pleasing, and the surgery should be minimally invasive with reduced surgical procedures. Commonly used skin traction devices include adhesive non-invasive skin traction devices and invasive skin traction devices. The former is mostly used for small wounds and cases with loose soft tissue. It consists of two adhesive plates and several traction strips. The adhesive plates are directly attached to the skin surface on both sides of the wound through adhesive strips, and the wound is closed by the traction of the traction strips, without invasiveness to the wound edges. The latter is mostly used for larger wounds. It is fixed by passing materials such as Kirschner wires, silicone, or rubber bands through the skin edges on both sides of the wound, and the wound is closed by utilizing the characteristics of skin stretching.

[0003] Commonly used invasive skin retraction devices typically consist of two Kirschner wires inserted 1 cm from the wound edge and fixed in the dermis. A metal connecting rod maintains wound tension, and a tension adjuster allows for tightening or loosening to adjust the skin tension as needed, gradually closing the wound. Some researchers have also used the principle of shoelaces or interrupted sutures to create an elastic rubber band mesh, pulling the skin edge to close the wound. Clinical trials have demonstrated that invasive skin retraction devices have achieved good clinical efficacy in treating large skin and soft tissue defects of the limbs.

[0004] However, in the current clinical application scenarios of invasive skin traction devices in my country, when the wounds on the limbs are large and the wounds are mostly arc-shaped skin defects, the existing skin traction devices are mostly flat designs, which often cause the muscle protrusions inside the wound to spill out when the wound is closed, thus hindering the closure of the wound skin. Summary of the Invention

[0005] This invention provides an adjustable skin stretcher and stretching method to solve the above-mentioned problems.

[0006] The present invention discloses an adjustable skin traction device and traction method, which adopts the following technical solution: An adjustable skin traction device includes an integrated plate and a traction unit; the length direction of the integrated plate is designated as a first direction, and the width direction is designated as a second direction. The direction perpendicular to the integrated plate is designated as a third direction; the third direction is perpendicular to both the first and second directions; in use, the integrated plate is placed on one side of the wound along the length direction of the wound, and the width direction of the integrated plate is parallel to the surface where the wound is located.

[0007] Multiple tensioning units are provided and distributed on the integrated plate along the first direction; the tensioning unit includes a slider, a sliding assembly, a mounting plate, Kirschner wires, a drive assembly, and a locking assembly.

[0008] The slider is a rectangular block; the slider has sliding columns on both sides along the first direction; the axis of the sliding column is set along the first direction; the sliding component is used to realize the slider moving along the second direction and to realize the slider swinging around the axis of the sliding column.

[0009] The mounting plate is located on one side of the integrated plate, and its length direction is set along the second direction. In use, the mounting plate is positioned between the integrated plate and the wound. A slide cylinder with its axis set along the third direction is fixed in the middle of the mounting plate. The slide cylinder and the slider can slide along the third direction and can rotate around the axis of the slide cylinder.

[0010] Two Kirschner wires are provided, symmetrically distributed on both sides of the slide cylinder; the Kirschner wires are arranged along a third direction and are slidably mounted on the mounting plate along a second direction.

[0011] The drive unit drives two Kirschner wires to move closer together to pull the skin at the wound site.

[0012] When the traction force of the two Kirschner wires on the skin reaches a preset value, the locking component locks the relative movement between the slide and the slider, and also locks the relative movement between the slider and the integration plate. Each tension unit uses a sliding component to move the slider along the second direction and swing around the axis of the slide column, thereby enabling the slide cylinder, mounting plate, and Kirschner wires to move along the second direction and swing around the axis of the slide column. The slide cylinder and slider can slide and rotate in a third direction, allowing the slide cylinder to move the mounting plate and Kirschner wires up and down and rotate around the axis of the slide cylinder. This achieves four degrees of freedom for the Kirschner wires: lifting, rotating around the vertical axis, sliding horizontally, and swinging around the horizontal axis. During initial installation, the Kirschner wires of each tension unit can be independently adjusted to the optimal position and angle, ensuring that the Kirschner wires are inserted perpendicular to the local curved surface of the wound. This achieves precise fit to curved or irregular wounds, resulting in consistent traction force at different locations and more accurate tension positioning.

[0013] Furthermore, the sliding assembly includes a first slide groove and a second slide groove; the first slide groove is a through groove formed on the integrated plate; the length direction of the first slide groove extends along the second direction; the slider is slidably disposed in the first slide groove; the second slide groove is disposed on the groove wall of the first slide groove, extending along the second direction along the length direction; the side wall of the slide column and the second slide groove are slidably and rotatably engaged.

[0014] Furthermore, the slider is provided with a first through hole and a second through hole; the axis of the first through hole is set along a third direction, and the axis of the second through hole is set along a first direction; the sliding column is slidably inserted into the second through hole; the sliding cylinder is slidably inserted into the first through hole, so that the sliding cylinder and the slider can slide and rotate along a third direction.

[0015] Furthermore, the drive assembly includes a drive rod and a connecting rod assembly. The drive rod is arranged along a third direction and coaxially within the slide cylinder, with its center threaded into the mounting plate. The connecting rod assembly includes two connecting rods, distributed on both sides of the drive rod. The connecting rods are inclined along a third direction, with one end hinged to a Kirschner wire and the other end hinged to the drive rod. The two connecting rods form an upward-opening V-shape. When the skin on both sides of the wound is stretched, rotating the drive rod causes it to move downward, driving the two Kirschner wires closer together.

[0016] Furthermore, the locking assembly includes a first braking layer, a side hole groove, an elastic plate, a convex ring, and a second braking layer.

[0017] The first braking layer is attached to the groove wall corresponding to the end face of the second slide groove and the slide column away from the axis of the slide cylinder.

[0018] Multiple side slots are provided along the circumference of the slide cylinder. The side slots are through holes opened on the side wall of the slide cylinder; the length direction of the side slots extends along the axis of the slide cylinder.

[0019] Multiple elastic plates are provided along the circumference of the slide cylinder, and each elastic plate corresponds to a side hole groove; the elastic plate is slidably disposed in the side hole groove; a top block is fixed on the side wall of the elastic plate near the axis of the slide cylinder.

[0020] The second braking layer is attached to the side wall of the elastic plate away from the axis of the slide; both the first and second braking layers are rough layers.

[0021] Multiple convex rings are evenly distributed along the axis of the drive rod near the integrated plate at one end of the drive rod. The convex rings are fixed to the side wall of the drive rod. Initially, the top block is positioned between two adjacent convex rings, and the convex rings abut against the elastic plate. After the Kirschner wire is inserted into the skin, the drive rod is rotated, causing it to move downwards and drive the two Kirschner wires closer together. The drive rod drives the convex rings to move downwards and push against the top block, causing the elastic plate to move away from the axis of the slide cylinder and protrude from the side slot. This causes the second braking layer and the hole wall of the first through hole to press against each other, restricting the relative movement between the slide cylinder and the slider, thus achieving the two degrees of freedom of locking the Kirschner wire: lifting and lowering, and rotating around the vertical axis. At the same time, the elastic plate pushes the sliding column, causing the sliding column and the first braking layer to press against each other, restricting the relative movement of the sliding column in the second sliding groove, thus achieving the two degrees of freedom of locking the Kirschner wire: horizontal sliding and swinging around the horizontal axis. During the process of pulling the wound, the top block is intermittently pressed by multiple convex rings, causing the locking component to intermittently lock and unlock the four degrees of freedom of the Kirschner wire. When unlocking, the muscles near the wound relax and adjust themselves, preventing mismatch between the tension angle and tension caused by different tension positions during the adjustment of tension.

[0022] Furthermore, a hexagonal end block is fixed to one end of the drive rod near the integrated plate. A torque wrench is set to a torque value, and the end block is rotated by the torque wrench. Assuming the locking resistance of the locking assembly is 2N and the preset tension at the wound is approximately 3N, the torque value set by the torque wrench is 5N. As the two Kirschner wires approach each other, the tension at the wound gradually increases. When the tension reaches the preset 3N, the torque wrench spins freely, and the drive rod is stopped from being turned.

[0023] Furthermore, two linkage groups are distributed along the third direction on the drive rod; the two connecting rods on the same side of the drive rod, the Kirschner wire, and the drive rod together form a parallelogram.

[0024] Furthermore, the mounting plate is provided with a mounting groove extending along the second direction in the length direction; the Kirschner wire and the mounting groove are slidably engaged.

[0025] A traction method using an adjustable skin traction device, comprising the following steps: S1. Determine a fitting straight line based on the direction of the wound, and place the centerline of the integrated plate to coincide with the fitting straight line.

[0026] S2, two Kirschner wires are placed on either side of the corresponding wound location, the line connecting the two Kirschner wires is perpendicular to the direction of the wound, and the insertion direction of the Kirschner wires is perpendicular to the surface where the wound is located; then the Kirschner wires are inserted into the skin.

[0027] S3, use tools to rotate the drive rods of each tension unit individually or simultaneously; drive the two Kirschner wires closer together to tension the wound.

[0028] S4, during the process of pulling the wound, the top block is intermittently pressed by multiple convex rings, causing the locking component to intermittently lock and unlock the four degrees of freedom of the Kirschner wire. When unlocking, the muscles near the wound relax and adjust themselves, preventing mismatch of the tension angle and tension caused by different tension positions during the adjustment of tension.

[0029] Furthermore, the tool in step S3 is a torque wrench.

[0030] The beneficial effects of this invention are: it realizes four degrees of freedom for the Kirschner wire to move up and down, rotate around the vertical axis, slide horizontally, and swing around the horizontal axis, so that during initial installation, the Kirschner wire of each tension unit can be independently adjusted to the optimal position and angle, ensuring that the Kirschner wire is inserted perpendicular to the local curved surface of the wound, achieving precise fit to arc-shaped or irregular wound surfaces, so as to achieve consistent tension at different positions and more accurate tension position.

[0031] Furthermore, during the process of traction on the wound, the top block is intermittently pressed by multiple convex rings, causing the locking component to intermittently lock and unlock the four degrees of freedom of the Kirschner wire. When unlocking, the muscles near the wound relax and adjust themselves, preventing mismatch between the traction angle and traction tension due to different traction positions during the adjustment of traction tension. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of an embodiment of an adjustable skin stretcher according to the present invention; Figure 2 This is a side view of an embodiment of an adjustable skin stretcher according to the present invention; Figure 3 This is a front view of an embodiment of an adjustable skin stretcher according to the present invention; Figure 4 This is a schematic diagram of an embodiment of the adjustable skin stretcher of the present invention after the integration plate has been removed; Figure 5 This is a schematic diagram of the integrated plate and tensioning unit of an embodiment of an adjustable skin tensioner according to the present invention; Figure 6 An exploded view of the traction unit of an embodiment of an adjustable skin traction device according to the present invention; Figure 7 This is a top view of the traction unit of an embodiment of an adjustable skin traction device according to the present invention; Figure 8 for Figure 7 A cross-sectional view along the AA direction; Figure 9 for Figure 8 Enlarged view of point B in the middle.

[0034] In the diagram: 100, wound; 200, integrated plate; 210, first slide groove; 220, second slide groove; 300, slider; 310, first through hole; 320, second through hole; 400, sliding column; 500, mounting plate; 600, slide cylinder; 700, Kirschner wire; 810, drive rod; 811, end block; 812, connecting rod; 910, elastic plate; 911, top block; 920, convex ring. Detailed Implementation

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] An embodiment of the adjustable skin traction device of the present invention, such as... Figures 1 to 9 As shown, it includes an integrated plate 200 and a tensioning unit; the length direction of the integrated plate 200 is designated as the first direction, and the width direction is designated as the second direction. The direction perpendicular to the integrated plate 200 is designated as the third direction; the third direction is perpendicular to both the first and second directions; in use, the integrated plate 200 is placed on one side of the wound 100 along the extension direction of the wound 100, and the width direction of the integrated plate 200 is parallel to the surface where the wound 100 is located.

[0037] Multiple tensioning units are provided and distributed on the integrated plate 200 along the first direction; the tensioning unit includes a slider 300, a sliding assembly, a mounting plate 500, a Kirschner wire 700, a driving assembly, and a locking assembly.

[0038] The slider 300 is a rectangular block; slider 300 has sliding posts 400 on both sides along a first direction; the axis of the sliding posts 400 is set along the first direction; the sliding assembly is used to realize the movement of slider 300 along a second direction and to realize the swing of slider 300 around the axis of sliding posts 400. The sliding assembly includes a first sliding groove 210 and a second sliding groove 220; the first sliding groove 210 is a through groove formed on the integrated plate 200; the length direction of the first sliding groove 210 extends along the second direction; slider 300 is slidably disposed in the first sliding groove 210; the length direction of the second sliding groove 220 is set on the groove wall of the first sliding groove 210; the side wall of the sliding post 400 and the second sliding groove 220 are slidably and rotatably engaged. The slider 300 is provided with a first through hole 310 and a second through hole 320; the axis of the first through hole 310 is set along a third direction, and the axis of the second through hole 320 is set along the first direction; the sliding post 400 is slidably inserted into the second through hole 320.

[0039] The mounting plate 500 is located on one side of the integrated plate 200, with its length direction along the second direction. In use, the mounting plate 500 is positioned between the integrated plate 200 and the wound 100. A slide cylinder 600 with its axis along the third direction is fixed in the middle of the mounting plate 500. The slide cylinder 600 and the slider 300 can slide along the third direction and rotate around the axis of the slide cylinder 600. The slide cylinder 600 is slidably inserted into the first through hole 310, enabling the slide cylinder 600 and the slider 300 to slide along the third direction and rotate around the axis of the slide cylinder 600.

[0040] Two Kirschner wires 700 are provided, symmetrically distributed on both sides of the slide cylinder 600; the Kirschner wires 700 are arranged along a third direction and slidably mounted on the mounting plate 500 along a second direction. The mounting plate 500 is provided with a mounting groove extending along the second direction in the length direction; the Kirschner wires 700 and the mounting groove are slidably engaged.

[0041] The drive assembly drives two Kirschner wires 700 closer together to pull the skin at the wound 100. The drive assembly includes a drive rod 810 and a linkage group; the drive rod 810 is arranged along a third direction, coaxially disposed within the slide cylinder 600, and threadedly engaged with the mounting plate 500 in the middle; the linkage group includes two connecting rods 812; the two connecting rods 812 are distributed on both sides of the drive rod 810; the connecting rods 812 are inclined along a third direction, with one end hinged to the Kirschner wire 700 and the other end hinged to the drive rod 810; the two connecting rods 812 form an upward-opening V-shape. When pulling the skin on both sides of the wound 100, the drive rod 810 is rotated, the drive rod 810 moves downward, driving the two Kirschner wires 700 closer together. Two linkage groups are distributed along a third direction on the drive rod 810; the two connecting rods 812 on the same side of the drive rod 810, the Kirschner wires 700, and the drive rod 810 form a parallelogram.

[0042] When the pulling force of the two Kirschner wires 700 on the skin reaches a preset value, the locking component locks the relative movement between the slide cylinder 600 and the slider 300, and also locks the relative movement between the slider 300 and the integrated plate 200. Each tension unit uses a sliding assembly to move the slider 300 along the second direction and swing around the axis of the slider 400 via the sliding column 400. The slider 300 then drives the sliding cylinder 600, mounting plate 500, and Kirschner wire 700 to move along the second direction and swing around the axis of the slider 400. The sliding cylinder 600 and slider 300 can slide and rotate along a third direction, allowing the sliding cylinder 600 to move the mounting plate 500 and Kirschner wire 700 up and down and rotate around its axis. This achieves four degrees of freedom for the Kirschner wire 700: up and down, rotation around the vertical axis, horizontal sliding, and swinging around the horizontal axis. During initial installation, the Kirschner wire 700 of each tension unit can be independently adjusted to the optimal position and angle, ensuring that the Kirschner wire 700 is inserted perpendicular to the local curved surface of the wound 100. This achieves precise fit to curved or irregular wound surfaces, resulting in consistent tension at different locations and more accurate tension positioning.

[0043] The locking assembly includes a first braking layer, side slots, elastic plates 910, a convex ring 920, and a second braking layer. The first braking layer is attached to the groove wall corresponding to the end face of the second slide groove 220 and the slide post 400 away from the axis of the slide cylinder 600. Multiple side slots are provided circumferentially along the slide cylinder 600, and each side slot is a through hole formed in the side wall of the slide cylinder 600; the length direction of the side slots extends along the axis of the slide cylinder 600. Multiple elastic plates 910 are provided circumferentially along the slide cylinder 600, each elastic plate 910 corresponding to one side slot; the elastic plates 910 are slidably disposed within the side slots; a top block 911 is fixed to the side wall of the elastic plate 910 near the axis of the slide cylinder 600. The second braking layer is attached to the side wall of the elastic plate 910 away from the axis of the slide cylinder 600; both the first and second braking layers are roughened layers. Multiple convex rings 920 are provided and are evenly distributed along the axis of the drive rod 810 at one end of the drive rod 810 near the integrated plate 200. The convex rings 920 are fixed on the side wall of the drive rod 810. Initially, the top block 911 is located between two adjacent convex rings 920, and the convex rings 920 and the elastic plate 910 abut against each other.

[0044] After the Kirschner wire 700 is inserted into the skin, the drive rod 810 is rotated, causing the drive rod 810 to move downward, driving the two Kirschner wires 700 closer together. The drive rod 810 drives the convex ring 920 to move downward and push the top block 911, driving the elastic plate 910 to move away from the axis of the slide cylinder 600 and protrude from the side hole groove, so that the second braking layer and the hole wall of the first through hole 310 are pressed together, restricting the relative movement between the slide cylinder 600 and the slider 300, that is, realizing the two degrees of freedom of locking the Kirschner wire 700: lifting and lowering and rotating around the vertical axis. At the same time, the elastic plate 910 pushes the sliding column 400, so that the sliding column 400 and the first braking layer are pressed together, restricting the relative movement of the sliding column 400 in the second sliding groove 220, that is, realizing the two degrees of freedom of locking the Kirschner wire 700: horizontal sliding and swinging around the horizontal axis. During the process of pulling the wound 100, the top block 911 is intermittently pressed by multiple protruding rings 920, causing the locking component to intermittently lock and unlock the four degrees of freedom of the Kirschner wire 700. When unlocking, the muscles near the wound 100 are relaxed and self-adjusted, preventing mismatch of the tension angle and tension caused by different tension positions during the adjustment of tension.

[0045] A hexagonal end block 811 is fixed to one end of the drive rod 810 near the integrated plate 200. A torque wrench is set to a torque value, and the end block 811 is rotated by the torque wrench. Assuming the locking resistance of the locking assembly is 2N and the preset tension at the wound 100 is approximately 3N, the torque value set by the torque wrench is 5N. As the two Kirschner wires 700 approach each other, the tension at the wound 100 gradually increases. When the tension reaches the preset 3N, the torque wrench spins freely, and the drive rod 810 is stopped from being turned.

[0046] A traction method using an adjustable skin traction device, comprising the following steps: S1. Determine a fitting straight line based on the direction of the wound 100, and place the centerline of the integrated plate 200 to coincide with the fitting straight line.

[0047] S2, two Kirschner wires 700 are located on both sides of the corresponding wound 100, the line connecting the two Kirschner wires 700 is perpendicular to the direction of the wound 100, and the insertion direction of the Kirschner wires 700 is perpendicular to the plane where the wound 100 is located; then the Kirschner wires 700 are inserted into the skin.

[0048] S3, use a torque wrench to rotate the drive rod 810 of each tensioning unit individually or simultaneously; drive the two Kirschner wires 700 to move closer to each other to tension the wound 100.

[0049] S4, during the process of pulling the wound 100, the top block 911 is intermittently pressed by multiple protruding rings 920, which causes the locking component to intermittently lock and unlock the four degrees of freedom of the Kirschner wire 700. When unlocking, the muscles near the wound 100 are relaxed and adjusted by themselves, preventing the mismatch of the tension angle and tension caused by different tension positions during the adjustment of tension.

[0050] Based on the above embodiments, the operating principle and process of this invention are as follows: In use, a fitted straight line is determined according to the direction of the wound 100, and the centerline of the integrated plate 200 is placed coinciding with this fitted straight line; two Kirschner wires 700 are respectively located on both sides of the corresponding wound 100 position, the line connecting the two Kirschner wires 700 is perpendicular to the direction of the wound 100 at that location, and the insertion direction of the Kirschner wires 700 is perpendicular to the plane where the wound 100 is located; then the Kirschner wires 700 are inserted into the skin; a torque wrench is used to rotate the drive rod 810 of each tensioning unit individually or simultaneously; this drives the two Kirschner wires 700 closer together to tension the wound 100. The drive rod 810 drives the convex ring 920 to move downward and push the top block 911, causing the elastic plate 910 to move away from the axis of the slide cylinder 600 and protrude from the side hole groove. This causes the second braking layer and the hole wall of the first through hole 310 to press against each other, restricting the relative movement between the slide cylinder 600 and the slider 300, thus realizing the two degrees of freedom of locking the Kirschner wire 700: lifting and lowering and rotating around the vertical axis. At the same time, the elastic plate 910 pushes the sliding column 400, causing the sliding column 400 and the first braking layer to press against each other, restricting the relative movement of the sliding column 400 within the second sliding groove 220, thus realizing the two degrees of freedom of locking the Kirschner wire 700: horizontal sliding and swinging around the horizontal axis. A torque wrench is set to a torque value, and the end block 811 is rotated using the torque wrench. Assuming the locking resistance of the locking assembly is 2N and the tension at the preset wound 100 is approximately 3N, the torque value set by the torque wrench is 5N. As the two Kirschner wires 700 approach each other, the tension at the wound 100 gradually increases. When the tension reaches the preset 3N, the torque wrench spins freely, and the torque drive rod 810 stops turning.

[0051] During the process of pulling the wound 100, the top block 911 is intermittently pressed by multiple protruding rings 920, causing the locking component to intermittently lock and unlock the four degrees of freedom of the Kirschner wire 700. When unlocking, the muscles near the wound 100 are relaxed and self-adjusted, preventing mismatch of the tension angle and tension caused by different tension positions during the adjustment of tension.

[0052] 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. An adjustable skin traction device, characterized in that: Includes an integrated plate and a tensioning unit; the length direction of the integrated plate is set as the first direction, and the width direction is set as the second direction; the direction perpendicular to the integrated plate is set as the third direction; in use, the length direction of the integrated plate is placed on one side of the wound along the wound extension direction, and the width direction of the integrated plate is parallel to the surface where the wound is located. Multiple tensioning units are provided and distributed along the first direction on the integrated plate; each tensioning unit includes a slider, a sliding assembly, a mounting plate, Kirschner wires, a drive assembly, and a locking assembly; The slider is a rectangular block; the slider has sliding pillars on both sides along the first direction; the axis of the sliding pillars is set along the first direction; the sliding component is used to realize the movement of the slider along the second direction and to realize the oscillation of the slider around the axis of the sliding pillars. The mounting plate is located on one side of the integrated plate, and its length direction is set along the second direction; in use, the mounting plate is positioned between the integrated plate and the wound; a sliding cylinder with its axis set along the third direction is fixed in the middle of the mounting plate; the sliding cylinder and the slider can slide along the third direction and can rotate in cooperation; Two Kirschner wires are provided, symmetrically distributed on both sides of the slide cylinder; the Kirschner wires are arranged along a third direction and are slidably mounted on the mounting plate along a second direction; The drive assembly moves two Kirschner wires closer together to pull the skin at the wound site; When the tension force applied to the skin by the two Kirschner wires reaches a preset value, the locking component locks the relative movement between the slide and the slider, and also locks the relative movement between the slider and the integrated plate.

2. The adjustable skin traction device according to claim 1, characterized in that: The sliding assembly includes a first slide groove and a second slide groove; the first slide groove is a through groove formed on the integrated plate; the length direction of the first slide groove extends along the second direction; the slider is slidably disposed in the first slide groove; the length direction of the second slide groove extends along the second direction and is disposed on the groove wall of the first slide groove; the side wall of the slide column and the second slide groove are slidably and rotatably engaged.

3. An adjustable skin traction device according to claim 2, characterized in that: The slider is provided with a first through hole and a second through hole; the axis of the first through hole is set along a third direction, and the axis of the second through hole is set along a first direction; the sliding column is slidably inserted into the second through hole; the sliding cylinder is slidably inserted into the first through hole.

4. An adjustable skin traction device according to claim 3, characterized in that: The drive assembly includes a drive rod and a connecting rod group; the drive rod is arranged along a third direction and coaxially disposed inside the slide cylinder, with its middle part threaded into the mounting plate; the connecting rod group includes two connecting rods; the two connecting rods are distributed on both sides of the drive rod; the connecting rods are inclined along a third direction, with one end hinged to a Kirschner wire and the other end hinged to the drive rod; the two connecting rods are V-shaped with the opening facing upwards.

5. An adjustable skin traction device according to claim 4, characterized in that: The locking assembly includes a first braking layer, a side slot, an elastic plate, a convex ring, and a second braking layer; The first braking layer is attached to the groove wall corresponding to the end face of the second slide groove and the slide column away from the axis of the slide cylinder; Multiple side slots are provided along the circumference of the slide cylinder, and the side slots are through holes opened on the side wall of the slide cylinder; the length direction of the side slots extends along the axis of the slide cylinder. Multiple elastic plates are provided along the circumference of the slide cylinder, and each elastic plate corresponds to a side hole groove; the elastic plate is slidably disposed in the side hole groove; a top block is fixed on the side wall of the elastic plate near the axis of the slide cylinder. The second braking layer is attached to the side wall of the elastic plate away from the axis of the slide cylinder; both the first and second braking layers are rough layers. Multiple convex rings are provided, evenly distributed along the axis of the drive rod at one end of the drive rod near the integrated plate; the convex rings are fixed on the side wall of the drive rod; initially, the top block is between two adjacent convex rings, and the convex rings and the elastic plate abut against each other.

6. An adjustable skin traction device according to claim 5, characterized in that: A hexagonal end block is fixed to one end of the drive rod near the integrated plate.

7. An adjustable skin traction device according to claim 6, characterized in that: Two linkage groups are distributed along the third direction on the drive rod; the two connecting rods on the same side of the drive rod, the Kirschner wire, and the drive rod together form a parallelogram.

8. An adjustable skin traction device according to claim 1, characterized in that: The mounting plate has a mounting groove extending along the second direction in the length direction; the Kirschner wire and the mounting groove are in sliding fit.

9. A traction method using an adjustable skin traction device, comprising the adjustable skin traction device described in claim 7, characterized in that: Includes the following steps: S1. Determine a fitting straight line based on the direction of the wound, and place the center line of the integrated plate to coincide with the fitting straight line. S2, two Kirschner wires are placed on either side of the corresponding wound location, the line connecting the two Kirschner wires is perpendicular to the direction of the wound, and the insertion direction of the Kirschner wires is perpendicular to the surface where the wound is located; then the Kirschner wires are inserted into the skin. S3, use tools to rotate the drive rods of each tension unit individually or simultaneously; drive the two Kirschner wires closer together to tension the wound; S4, during the process of pulling the wound, the top block is intermittently pressed by multiple convex rings, causing the locking component to intermittently lock and unlock the four degrees of freedom of the Kirschner wire.

10. The traction method of an adjustable skin traction device according to claim 9, characterized in that: The tool used in step S3 is a torque wrench.

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