Skin stretching device

Abstract

The invention discloses a skin distractor in the technical field of medical instruments, which comprises a double-end needle traction line and a tension reducing sleeve, and further comprises two groups of traction assemblies which are oppositely arranged, each traction assembly comprises a rotating wheel disc which is in threaded connection with a wiring plate, one side of each rotating wheel disc is provided with an anti-rotation mechanism for preventing the rotating wheel disc from rotating, and the other side of each rotating wheel disc is provided with a tension reducing sleeve. The multiple rotating wheel discs on the two traction assemblies fix the double-end needle traction lines respectively, the traction force of the corresponding double-end needle traction lines can be controlled by rotating the corresponding rotating wheel discs, the traction force is controlled by controlling the rotating angles of the rotating wheel discs correspondingly, the traction force is more controllable, and the operation effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a skin stretcher. Background Art

[0002] Skin and soft tissue defects are common surgical problems in clinical practice. There are many causes, including tumors, scars, trauma, inflammation, surgery, and skin lesions. When the skin wound edge has a large tension and cannot be sutured directly, skin grafting or flap transfer is often used to repair it. The skin stretching technique developed in recent years uses the looseness and ductility of the skin to use a stretcher to pull the skin edges on both sides of the wound toward the center, so as to gradually reduce the wound and finally suture and eliminate the wound surface.

[0003] Skin stretching, also known as skin external expansion, is an effective method for treating skin defects. This technique is a technique that uses a certain intensity of pulling force to close the skin wound. Its working principle is to use the pulling force to pull the normal skin on both sides of the wound edge toward the center, thereby using the skin's own stretchability (also known as viscoelasticity) to extend the skin, and the skin does not retract after the pulling force is removed, thereby generating "extra skin" to close the wound. In current clinical surgery, the commonly used method is to first insert a Kirschner wire (or insert a needle hook) 1-2 cm away from the wound edge to fix the skin, and then tighten the Kirschner wires (or needle hook components) on both sides of the wound edge, thereby gradually stretching the skin and contracting the wound until the wound is closed. However, this method relies entirely on the operator's experience, and the controllability of the stretching force is poor. Summary of the invention

[0004] The purpose of the present invention is to provide a skin stretcher, which solves the problem that the pulling force of a double-ended needle pulling line in the process of pulling the skin in the existing skin expansion surgery is uncontrollable.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a skin stretcher, comprising a double-ended needle traction wire and a tension-reducing sleeve, and also comprising two sets of traction components arranged opposite to each other, the traction components comprising a rotating wheel threadedly connected to a wiring board, and an anti-rotation mechanism is arranged on one side of the rotating wheel to prevent the rotating wheel from rotating.

[0006] Furthermore, the outer side of the wiring board is fixed on a rotating shaft, and both ends of the rotating shaft are detachably and rotatably connected to a supporting frame.

[0007] Furthermore, the rotating wheel disc is provided with a first through hole and a second through hole penetrating along the chord length direction, and the first through hole and the second through hole are symmetrically distributed on both sides of the center of the rotating wheel disc.

[0008] Furthermore, a hexagonal groove is provided at the center of the top surface of the rotating wheel, and the hexagonal groove is cooperatively connected with a torque screwdriver.

[0009] Furthermore, an annular groove is provided on the outer cylindrical surface of the rotating wheel, and the first through hole and the second through hole pass through the annular groove.

[0010] Furthermore, the anti-rotation mechanism includes a ratchet coaxially fixedly connected to the rotating wheel, a braking pawl is provided on one side of the ratchet, one end of the braking pawl is engaged with the ratchet, and the other end of the braking pawl is rotatably connected to the sliding shaft, and a torsion spring is connected between the braking pawl and the sliding shaft, so that the braking pawl can return to its original position after rotating relative to the sliding shaft through the torsion spring, and the sliding shaft can slide axially along the rotating wheel.

[0011] Furthermore, a plurality of the rotating wheels are spaced apart on the wiring board, the wiring boards in the two groups of the pulling assemblies are arranged opposite to each other, and the rotating wheels on the two wiring boards are spaced apart.

[0012] Furthermore, the support frame includes a first support plate, a second support plate, a first length limiting plate and a second length limiting plate which are assembled and enclosed into a rectangle, the first support plate and the second support plate are arranged opposite to each other, the first length limiting plate and the second length limiting plate are arranged opposite to each other, and the first support plate and the second support plate are provided with card grooves for the card connection part to clamp.

[0013] Furthermore, columns are fixed at both ends of the first support plate, the second support plate, the first length limiting plate and the second length limiting plate. The columns extend outward and are adjustably connected to abutment plates, and at least two suture holes are evenly distributed along the circumference of the abutment plates.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Each double-ended needle traction wire is fixed separately by using multiple rotating wheels on the two sets of traction components, and then the traction force of the corresponding double-ended needle traction wire can be controlled by rotating the corresponding rotating wheel. The size of the rotation angle of the rotating wheel corresponds to the control of the traction force, making the traction force more controllable. In addition, each double-ended needle traction wire is controlled individually, and the traction force of the corresponding double-ended needle traction wire can be flexibly adjusted according to the actual situation around the skin defect. Therefore, the skin stretcher in this scheme makes the skin external expansion surgery more controllable, less dependent on the operator's experience, and improves the surgical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the skin stretcher;

[0017] Figure 2 All of them are schematic diagrams of the routing of the double-ended needle pull line;

[0018] Figure 3is a cross-sectional view along the radial direction of the rotating wheel disc;

[0019] Figure 4 This is a side view of the skin stretcher;

[0020] In the figure: 1. double-ended needle pulling line; 2. tension-reducing sleeve; 3. rotating wheel; 31. first through hole; 32. second through hole; 33. hexagonal groove; 34. circular groove; 4. wiring board; 41. rotating shaft; 5. anti-rotation mechanism; 51. ratchet; 52. braking pawl; 53. sliding shaft; 6. supporting frame; 61. first supporting plate; 62. second supporting plate; 63. first length limiting plate; 64. second length limiting plate; 65. slot; 66. column; 67. abutment disk; 68. suture hole; 7. ruler. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1 to Figure 4 As shown, in the embodiment of the present invention, the skin stretcher includes a double-ended needle pull line 1 and a tension-reducing sleeve 2. The double-ended needle pull line 1 and the tension-reducing sleeve 2 are two surgical instruments commonly used in skin external expansion surgery. The double-ended needle pull line 1 includes a pull line with certain toughness and strength and two straight needles connected at both ends of the pull line. The tension-reducing sleeve 2 is commonly used in clinical practice. It is a transparent silicone tube with an inner diameter of 3 to 5 mm and a length of about two centimeters. When performing skin external expansion surgery, the tension-reducing sleeve is put on the pull line to reduce the local pressure of the skin being stretched, thereby avoiding strangulation of the skin.

[0023] The skin stretcher also includes two sets of pulling components arranged opposite to each other. In this embodiment, the pulling components use a torque screwdriver with adjustable force to pull the pulling wire, instead of relying on the operator's hands to pull in the existing operation, making it more controllable and easier to operate. Each set of pulling components includes a rotating wheel 3 threadedly connected to a wiring board 4, and an anti-rotation mechanism 5 is provided on one side of the rotating wheel 3 to prevent the rotating wheel 3 from rotating. The anti-rotation mechanism 5 allows the rotating wheel 3 to rotate in only one direction.

[0024] like Figure 1 and Figure 3As shown, the anti-rotation mechanism 5 includes a ratchet 51 which is coaxially fixedly connected to the rotating wheel 3, and a braking pawl 52 is provided on one side of the ratchet 51. One end of the braking pawl 52 is meshed with the ratchet 51, and the other end of the braking pawl 52 is rotatably connected to the sliding shaft 53. A torsion spring is connected between the braking pawl 52 and the sliding shaft 53. The torsion spring enables the braking pawl 52 to return to its original position after rotating relative to the sliding shaft 53, and the sliding shaft 53 can slide axially along the rotating wheel 3.

[0025] One end of the braking pawl 52 is meshed with the ratchet 51. Due to the structural features of the pawl and the ratchet, the ratchet 51 can only rotate in one direction. If the direction is recorded as clockwise, if the ratchet 51 wants to rotate counterclockwise, the operator needs to press the sliding shaft 53 to allow the braking pawl 52 to slide out along the axial direction of the ratchet and no longer mesh with the ratchet 51. The end of the sliding shaft 53 is slidably installed on the wiring board 4 and a compression spring is connected between the wiring board 4. After pressing the sliding shaft 53, the sliding shaft 53 squeezes the compression spring. When not pressed, the braking pawl 52 returns to a state of meshing with the ratchet 51 under the action of the elastic force of the compression spring.

[0026] The outer side of the wiring board 4 is fixed on the rotating shaft 41, and the two ends of the rotating shaft 41 are embedded in the supporting grooves of the supporting frame. The bottom of the supporting groove is set as an arc-shaped groove that matches the clearance of the two ends of the rotating shaft 41, so that the rotating shaft 41 can rotate freely in the supporting groove. During use, the wiring board 4 can flexibly change the angle relative to the supporting frame according to the actual position of the wound surface, thereby improving the convenience of operation. The supporting frame 6 abuts against the wound to support the traction component to provide a stable force during traction.

[0027] The support frame 6 includes a first support plate 61, a second support plate 62, a first length limiting plate 63 and a second length limiting plate 64 which are assembled and enclosed into a rectangle. The first support plate 61 and the second support plate 62 are arranged opposite to each other, and the first length limiting plate 63 and the second length limiting plate 64 are arranged opposite to each other. The first support plate 61 and the second support plate 62 are provided with a card slot 65 for the two ends of the rotating shaft 41 to be embedded and rotated. The card slot 65 is a U-shaped slot, and the bottom of the U-shaped slot is a semicircular arc that is clearance-matched with the rotating shaft 41, so that the rotating shaft 41 can rotate freely in the U-shaped slot under the action of gravity. When pulling the traction wire, the traction direction can be slightly different according to the different wound areas of different patients, so the required angle between the wiring board 4 and the support frame 6 is different. The free rotation of the rotating shaft 41 can make the angle fine-tuned within the range of 10 to 20 degrees, which does not require any equipment to achieve, and can be achieved by pulling the wire.

[0028] The first support plate 61 and the second support plate 62 are used to support the wiring board 4, and the first length limiting plate 63 and the second length limiting plate 64 are used to allow the support frame 6 to form a stable rectangular structure. Dovetail bosses are fixed at both ends of the first length limiting plate 63, and the dovetail bosses at both ends are respectively inserted from top to bottom into dovetail grooves relatively arranged on the first support plate 61 and the second support plate 62. The second length limiting plate 64 has the same structure as the first length limiting plate 63 and is inserted into the dovetail groove at the other end of the first support plate 61 and the second support plate 62, and the lower end of the dovetail groove is not penetrated so as to support the two length limiting plates.

[0029] Both ends of the first support plate 61, the second support plate 62, the first length limiting plate 63 and the second length limiting plate 64 are fixed with a column 66, which extends outward and is connected to an abutment plate 67 through a thread. The length of the threaded connection is adjusted by rotating the abutment plate 67, so that the distance between the column 66 and the abutment plate 67 can be adjusted according to actual conditions, so that the abutment plate 67 can better abut and support. The abutment plate 67 can increase the abutment area and improve comfort. As a preferred mode of this embodiment, at least two suture holes 68 are evenly distributed along the circumference of the abutment plate 67, so that in some application scenarios where abutment cannot be used for stable support, the abutment plate 67 can be fixed by sutures through the suture holes 68.

[0030] The shapes of the first support plate 61, the second support plate 62, the first length limiting plate 63 and the second length limiting plate 64 can be adaptively changed according to the location of the wound. In this embodiment, the wound is located on the thigh as an example. Figure 4 As shown, the first support plate 61 and the second support plate 62 are fan-shaped, matching the anatomical structure of the thigh, and an arched operating space is reserved inside the "fan-shaped" to facilitate suturing and flushing operations. The columns 66 are distributed along the radial direction of the fan-shaped so that the abutment plate 67 can directly abut on the patient's thigh.

[0031] If the wound is located in a flat area, such as during abdominal suture or skin removal in the lower abdomen, the surgeon only needs to replace the first support plate 61 and the second support plate 62 of the rectangular structure.

[0032] The rotating wheel 3 is provided with a first through hole 31 and a second through hole 32 that penetrate along the chord length direction, and the first through hole 31 and the second through hole 32 are symmetrically distributed on both sides of the center of the rotating wheel. The first through hole 31 and the second through hole 32 are used for the straight needles at both ends of the double-ended needle traction line 1 to pass through, and then the two ends of the traction line are knotted, so that the double-ended needle traction line 1 can be directly fixed on the rotating wheel 3, and when the rotating wheel 3 is rotated, the traction line can be tightened, making the operation easier. An annular groove 34 is provided on the outer cylindrical surface of the rotating wheel 3, and the first through hole 31 and the second through hole 32 pass through the annular groove 34. The annular groove 34 allows the traction line to be located in the annular groove 34 to avoid slipping outward.

[0033] A hexagonal groove 33 is provided at the center of the top surface of the rotating wheel 3, and the hexagonal groove 33 is connected with a torque screwdriver. When the rotating wheel 3 needs to be rotated, the torque screwdriver is inserted and rotated, and the rotation angle of the rotating wheel 3 is controlled by the torque screwdriver, thereby controlling the pulling force of the pulling line and improving controllability. The torque screwdriver is a commonly used tool in industry, which is used to tighten threaded connectors. The torque is controlled by adjusting the torque value. When the set torque value is exceeded, the screwdriver will make a sound or loosen to remind the operator to stop tightening, so the required torque value needs to be adjusted before use.

[0034] There are multiple rotating wheels 3 distributed at intervals on the wiring board 4. The wiring boards 4 in the two pulling components are arranged opposite to each other. The rotating wheels 3 on the two wiring boards 4 are arranged crosswise. The crosswise arrangement can restrain each other to be tightened, and suturing requires pulling in pairs.

[0035] like Figure 2 As shown, the size comparison of the rotating wheel disk 3 and the tension-reducing sleeve 2 is shown. The number on the left is the ruler 7, the unit is centimeters, the diameter of the rotating wheel disk 3 is 2 cm, the spacing between two adjacent rotating wheel disks 3 on the same side is 2 cm, and the length of the tension-reducing sleeve 2 is 2 cm. During the operation, the two ends of the double-ended needle traction line 1 pass through the skin from one side of the tension-reducing sleeve 2, and the line passes through the middle of the wound and then passes through the first through hole 31 and the second through hole 32 on the rotating wheel disk 3 respectively and then is knotted. The traction line is used to pull up the wound edge on one side of the tension-reducing sleeve to avoid the wound edge from rolling inward, which is beneficial to the recovery of the wound; two sets of rotating wheels (a pair of rotating wheels arranged oppositely represents one group) are suitable for 10 cm wounds, and three sets of rotating wheels (such as Figure 2 The three rotating wheels shown are suitable for wounds up to 15 cm in size. These two models can be adapted to a wide variety of wounds, achieving the highest applicability. When suturing, each wound is sutured in sequence, with one tension-reducing sleeve corresponding to one suture. When pulling, the rotating wheels are also rotated in sequence.

[0036] Method of using the above-mentioned skin stretcher:

[0037] S1, select the type of traction assembly according to the length of the wound, specifically whether to use a traction assembly with two sets of rotating wheels or three sets of rotating wheels, symmetrically clamp the selected two sets of traction assemblies on the support frame 6, so that the skin defect is located between the two sets of traction assemblies, and adjust the length between the abutment disk 67 and the column 66 so that the abutment disk 67 abuts against the support, which can be a patient's body part or an external object for support;

[0038] S2, suturing starts from one end of the wound, and a pair of rotating wheels set opposite to each other represent one group;

[0039] Put the tension-reducing sleeve 2 on the double-ended needle traction wire 1, and use the needles at both ends of the double-ended needle traction wire 1 to penetrate the skin from the right side (or left side) of the skin defect, and fix the two ends of the traction wire on the left (or right) rotating wheel respectively after the wire comes out from the middle of the wound; then use the same method to pierce the skin from the left (or right) side for another double-ended needle traction wire 1 in the same group, and then penetrate it from the middle of the wound and fix it on another rotating wheel on the right (or left) side of the same group; use a torque screwdriver to rotate the rotating wheel according to the preset torque, tighten the traction wires to pull the wound edges in pairs,

[0040] S3, repeat step S2 to complete the traction corresponding to the next two or three groups of rotating wheels, and then the surgeon can also adjust the rotation angles of all rotating wheels according to the suturing effect of the wound edge until the suturing is in place, and finally fix the traction line according to the suturing surgery specifications and remove the skin stretcher.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A skin stretcher, comprising a double-ended needle pull line (1) and a tension-reducing sleeve (2), characterized in that: It also comprises two sets of pulling components arranged opposite to each other, wherein the pulling components comprise a rotating wheel (3) threadedly connected to a wiring board (4), and an anti-rotation mechanism (5) for preventing the rotating wheel (3) from rotating is arranged on one side of the rotating wheel (3).

2. A skin stretcher according to claim 1, characterized in that: The outer side of the wiring board (4) is fixed on a rotating shaft (41), and the two ends of the rotating shaft (41) are detachably and rotatably connected to a supporting frame (6).

3. A skin stretcher according to claim 1, characterized in that: The rotating wheel disc (3) is provided with a first through hole (31) and a second through hole (32) penetrating along the chord length direction, and the first through hole (31) and the second through hole (32) are symmetrically distributed on both sides of the center of the rotating wheel disc.

4. A skin stretcher according to claim 1, characterized in that: A hexagonal groove (33) is provided at the center of the top surface of the rotating wheel disc (3), and the hexagonal groove (33) is used in conjunction with a torque screwdriver.

5. A skin stretcher according to claim 1 or 3, characterized in that: An annular groove (34) is provided on the outer cylindrical surface of the rotating wheel disc (3), and the first through hole (31) and the second through hole (32) pass through the annular groove (34).

6. The skin stretcher according to claim 1, characterized in that: The anti-rotation mechanism (5) comprises a ratchet (51) coaxially fixedly connected to the rotating wheel (3); a braking pawl (52) is provided on one side of the ratchet (51); one end of the braking pawl (52) is meshed with the ratchet (51); the other end of the braking pawl (52) is rotatably connected to a sliding shaft (53); a torsion spring is connected between the braking pawl (52) and the sliding shaft (53); the braking pawl (52) can return to its original position after rotating relative to the sliding shaft (53) through the torsion spring; and the sliding shaft (53) can slide axially along the rotating wheel (3).

7. A skin stretcher according to claim 2, characterized in that: A plurality of rotating wheels (3) are spaced apart on the wiring board (4); the wiring boards (4) in two groups of pulling assemblies are arranged opposite to each other, and the rotating wheels (3) on the two wiring boards (4) are spaced apart.

8. A skin stretcher according to claim 2, characterized in that: The support frame (6) comprises a first support plate (61), a second support plate (62), a first length limiting plate (63) and a second length limiting plate (64) which are assembled and enclosed to form a rectangle; the first support plate (61) and the second support plate (62) are arranged opposite to each other; the first length limiting plate (63) and the second length limiting plate (64) are arranged opposite to each other; and the first support plate (61) and the second support plate (62) are provided with slots (65) for the two ends of the rotating shaft (41) to be embedded and rotated.

9. A skin stretcher according to claim 8, characterized in that: Both ends of the first support plate (61), the second support plate (62), the first length limiting plate (63) and the second length limiting plate (64) are fixed with upright posts (66), the upright posts (66) extend outward and are adjustably connected to abutment plates (67), and the abutment plates (67) are provided with at least two suture holes (68) evenly distributed along the circumference.

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