Medical wire retractor and methods of use

Abstract

The application discloses a medical steel wire tractor and a use method thereof, and comprises a sleeve, a movable piece, a clamping assembly, a screw rod, a limiting gasket, a first spring, a handle and a second spring. In the tensioning process, the second spring compression length can be used to determine the tensioning force, so that the appropriate tensioning force can be applied to the steel wire, the situation of too large or too small tensioning force can be avoided, the problem that the internal dislocation of the internal bone of a patient is caused by too small tensioning force and leads to operation failure, and the problem that the strength of the steel wire is reduced due to too large tensioning force and the service life of the steel wire is greatly reduced and the bone resetting and fixing strength are greatly affected can be effectively solved. Therefore, the overall use effect is better.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to a medical wire traction device and its method of use. Background Technology

[0002] In orthopedic fracture surgery, to reduce pathogenic damage and minimize patient suffering, minimally invasive reduction methods are usually used. This involves making only a small incision, then passing a wire through the affected area to reduce and fix the bone. Because the wire has a certain degree of elasticity and toughness, it needs to be straightened after passing through the affected area to achieve better treatment results. Since a large force is required, a traction device is often used to straighten the wire in the affected area.

[0003] Because the existing traction device has the wire inside the patient's body, it is difficult to determine whether the wire is taut during the tightening process. Tightening can only be done based on the operator's experience, which can easily lead to the wire not being straight enough, causing internal bone misalignment and resulting in surgical failure. Alternatively, excessive tightening force can reduce the strength of the wire, significantly shortening its lifespan and greatly affecting its ability to reposition and fix the bone, thus posing a greater risk to the patient. Therefore, it is necessary to further improve the structure of the existing traction device. Summary of the Invention

[0004] In view of this, the present invention addresses the deficiencies of the prior art, and its main objective is to provide a medical wire traction device and its method of use, which can solve the problems of existing traction devices having difficulty in determining whether the wire is taut, and the wire tension being insufficient or excessive.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A medical wire traction device includes a sleeve, a movable component, a clamping assembly, a screw, a limiting washer, a first spring, a handle, a second spring, and a fixing assembly. The sleeve has a mounting cavity with an open rear end, and a limiting boss protrudes inward from the inner wall of the mounting cavity. The front end of the sleeve has a feed inlet communicating with the interior of the mounting cavity. The movable component is movably disposed within the mounting cavity and has a movable cavity with open ends. The clamping assembly is movably disposed within the movable cavity and moves back and forth with the movable component; the clamping assembly corresponds to the position of the feed inlet. The rod is movably mounted in the mounting cavity and drives the movable part to move back and forth. The front end of the screw fits into the rear opening of the movable cavity. The limiting washer is sleeved on the screw, and the front end of the limiting washer abuts against the limiting boss. The first spring is sleeved on the screw, and the two ends of the first spring abut against the movable part and the limiting washer respectively. The handle is rotatably mounted on the sleeve and extends into the mounting cavity. The handle is screwed to the rear end of the screw and drives the screw to move back and forth. The second spring is sleeved on the screw, and the two ends of the second spring abut against the handle and the limiting washer respectively.

[0007] As a preferred embodiment, the front end of the sleeve extends forward integrally with a positioning post, and the aforementioned feed port is located next to the positioning post.

[0008] As a preferred embodiment, the sleeve sidewall is provided with a front-to-back extending limiting groove, and the sidewall of the movable part is provided with a limiting post, which cooperates with the limiting groove and extends inward into the limiting groove.

[0009] As a preferred embodiment, the inner wall of the movable cavity is conical, and the diameter of the inner wall increases sequentially from front to back; the clamping assembly includes a clamping cylinder and multiple steel balls; the clamping cylinder has a clamping hole penetrating the front and rear ends of the clamping cylinder, and the outer wall of the clamping hole is also conical, which mates with the inner wall of the movable cavity; the side wall of the clamping hole has mounting holes that communicate with the clamping hole, and multiple mounting holes are arranged at equal angles; the steel balls are movably disposed in the aforementioned mounting holes, and the outside of the steel balls abuts against the inner wall of the movable cavity, with each steel ball disposed in a corresponding mounting hole.

[0010] As a preferred embodiment, a third spring is also included, which rests between the rear end face of the clamping cylinder and the front end face of the screw.

[0011] As a preferred embodiment, the rear end of the clamping cylinder is integrally recessed inward with a first mounting groove, the front end of the screw is recessed inward with a second mounting groove, and the two ends of the third spring are respectively disposed in the first mounting groove and the second mounting groove, and abut against the bottom surface of the first mounting groove and the second mounting groove.

[0012] As a preferred embodiment, the front end of the screw is fixed to the rear end of the movable part by screwing, thereby driving the movable part to move back and forth.

[0013] As a preferred embodiment, the outer wall surface of the handle is provided with scale lines, the front end of which extends into the rear end of the mounting cavity, and the rear end of which protrudes outward from the rear end of the sleeve.

[0014] A method for using a medical wire traction device, employing a fixing component and the medical wire traction device as described in any one of claims 1-9, wherein the fixing component includes a fixing plate, two locking members, and two locking bolts, the periphery of which has a plurality of fixing holes arranged at intervals; both locking members are lockably mounted on the fixing plate and are symmetrically arranged, the locking members are positioned in conjunction with the front end of the sleeve, and the two locking bolts are disposed in the fixing holes and engage with the corresponding locking members for locking; the method includes the following steps:

[0015] (1) The fixation plate is placed on the patient's fracture site, and the two ends of the steel wire extending from the fracture site are pre-fixed by the cooperation of two locking bolts and locking parts;

[0016] (2) Lock one of the locking components with a locking bolt and fix one end of the steel wire;

[0017] (3) Place the front end of the sleeve against another locking element, and insert the other end of the steel wire into the clamping assembly through the feed port and clamp the steel wire by turning the handle;

[0018] (4) Turn the handle so that the handle first drives the screw to move backward, and at the same time drives the moving part to move backward to tighten the steel wire. At this time, the first spring provides the tension.

[0019] (5) Continue to rotate the handle to compress the second spring and provide elastic force. At this time, the handle is screwed into the mounting cavity.

[0020] (6) When the handle is screwed into the mounting cavity a certain distance, the locking part near the sleeve is locked, thereby fixing the other end of the steel wire;

[0021] (7) Rotate the handle in the opposite direction until the other end of the wire is disengaged from the feed port of the traction device;

[0022] (8) Loosen the two locking parts at both ends of the steel wire by using the two locking bolts, and remove the fixing plate.

[0023] As a preferred embodiment, the fixing plate is annular, with a through groove running through it; each locking component has a fixing groove through which a steel wire passes, and the locking component has a positioning hole that mates with the positioning pin; the sleeve is positioned by the engagement of the positioning pin and the positioning hole with the locking component.

[0024] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0025] By incorporating a movable component, clamping assembly, screw, limiting washer, first spring, handle, and second spring, the tightening process begins with the handle driving the screw and movable component backward, simultaneously compressing the first spring and pre-tensioning the wire. When the first spring's compression force is sufficient, it limits the screw's position. Further rotation of the handle moves it forward toward the screw, compressing the second spring. The second spring's elasticity then tightens the wire, allowing the tension to be determined by the spring's compression length. This facilitates applying appropriate tension, preventing excessive or insufficient force. It effectively addresses the issues of insufficient tension leading to internal bone misalignment and surgical failure, and excessive tension reducing wire strength and lifespan, significantly impacting bone repositioning and fixation. Therefore, its overall performance is superior.

[0026] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0027] Figure 1 This is a cross-sectional schematic diagram of a preferred embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional schematic diagram of a preferred embodiment of the present invention from another angle;

[0029] Figure 3 This is a three-dimensional structural diagram of the fixing component in a preferred embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the usage state of a preferred embodiment of the present invention.

[0031] Explanation of reference numerals in the attached diagram:

[0032] 10. Sleeve 101. Mounting cavity

[0033] 102. Feed inlet; 103. Limiting groove

[0034] 11. Limiting boss 12. Positioning post

[0035] 20. Movable component 201. Movable cavity

[0036] 21. Limiting post; 30. Clamping assembly

[0037] 301. Clamping hole; 302. Mounting hole

[0038] 303, mounting slot 31, clamping cylinder

[0039] 32. Steel balls; 40. Screw

[0040] 401, Second mounting slot; 41, Third spring

[0041] 50. Limiting washer; 60. First spring

[0042] 70. Handle; 71. Scale lines

[0043] 80. Second spring; 90. Fixing assembly

[0044] 901, through groove; 902, fixing hole

[0045] 903, Fixing groove; 904, Positioning hole

[0046] 91. Fixed plate 92. Locking component

[0047] 93. Tighten the bolts. Detailed Implementation

[0048] Please refer to Figures 1 to 4 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, which includes a sleeve 10, a movable part 20, a clamping assembly 30, a screw 40, a limiting washer 50, a first spring 60, a handle 70, a second spring 80, and a fixing assembly 90.

[0049] The sleeve 10 has a mounting cavity 101 with an opening at the rear end. A limiting boss 11 protrudes inward from the inner wall of the mounting cavity 101, and the front end of the sleeve 10 has a feed port 102 communicating with the interior of the mounting cavity 101. In this embodiment, a positioning post 12 extends forward integrally from the front end of the sleeve 10. The aforementioned feed port 102 is located beside the positioning post 12. The positioning post 12 is used to position the sleeve 10 against the outside when the steel wire is tightened, so as to prevent the sleeve 10 from sliding and thus affecting the tightening effect. A limiting groove 103 extending forward and backward is provided on the side wall of the sleeve 10.

[0050] The movable component 20 is movably disposed in the mounting cavity 101, and the movable component 20 has a movable cavity 201 with openings at both ends. In this embodiment, a limiting post 21 is provided on the side wall of the movable component 20. The limiting post 21 cooperates with the limiting groove 103 and extends inward into the limiting groove 103. The sleeve 10 limits the movable component 20 through the cooperation of the limiting groove 103 and the limiting post 21, preventing the movable component 20 from rotating during the movement, ensuring the stability of the tensioning process. At the same time, the tensioning stroke of the steel wire can be judged by directly observing the position of the limiting post 21, making the tensioning process more convenient. The inner wall surface of the movable cavity 201 is conical, and the diameter of the inner wall surface of the movable cavity 201 increases sequentially from front to back.

[0051] The clamping assembly 30 is movably disposed in the movable cavity 201 and moves back and forth with the movable component 20. The clamping assembly 30 corresponds to the position of the feed inlet 102. In this embodiment, the clamping assembly 30 includes a clamping cylinder 31 and a plurality of steel balls 32. The clamping cylinder 31 has a clamping hole 301 that penetrates the front and rear end faces of the clamping cylinder 31, and the outer wall of the clamping hole 301 is also conical, which cooperates with the inner wall of the movable cavity 201. The side wall of the clamping hole 301 has mounting holes 302 that communicate with the clamping hole 301. The mounting holes 302 are arranged in a plurality of equal angles. The steel balls 32 are movably disposed in the aforementioned mounting holes 302, and the outside of the steel balls 32 abuts against the inner wall of the movable cavity 201. Each steel ball 32 is disposed in a corresponding mounting hole 302, so that when clamping the steel wire, the clamping assembly 30 first passes the steel wire through the plurality of steel balls 32 to tighten it. When the steel wire is clamped, the steel wire will exert a forward force on the clamping assembly 30, thereby causing the clamping assembly to move forward a short distance. At this time, the inner wall of the movable cavity 201 becomes smaller towards the front, thus squeezing the steel ball 32 inward, thereby causing the steel ball 32 to clamp the steel wire. At the same time, when the movable part 20 moves backward, it will further clamp the steel wire. The clamping method of using multiple steel balls not only has a greater clamping force, but also requires less operation during the clamping process. When removing it, you only need to turn the handle 70 in the opposite direction to make the movable part 20 move forward, making the operation simpler. The mounting holes 302 are arranged in three equal angles, and correspondingly, there are also three steel balls 32. Each steel ball 32 is set in the corresponding mounting hole 302. The mounting holes 302 and steel balls 32 can also be arranged in other numbers at equal angles, which is not limited. The rear end of the clamping cylinder 31 is integrally recessed inward with a first mounting groove 303.

[0052] The screw 40 is movably disposed in the mounting cavity 101 and drives the movable part 20 to move back and forth. The front end of the screw 40 engages with the rear end opening of the movable cavity 201. In this embodiment, a third spring 41 is also included, which rests between the rear end face of the clamping cylinder 31 and the front end face of the screw 40. The front end face of the screw 40 is recessed with a second mounting groove 401. The two ends of the third spring 41 are respectively disposed in the first mounting groove 303 and the second mounting groove 401, and rest against the bottom surfaces of the first mounting groove 303 and the second mounting groove 401. The third spring 41 is used to cause the clamping cylinder 31 to move forward, thereby clamping the steel wire. The front end of the screw 40 is fixed to the rear end of the movable part 20 by screwing and drives the movable part 20 to move back and forth.

[0053] The limiting gasket 50 is sleeved on the screw 40, and the front end face of the limiting gasket 50 abuts against the limiting boss 11; the limiting boss 11 is used to limit the position of the limiting gasket 50.

[0054] The first spring 60 is sleeved on the screw 40, and the two ends of the first spring 60 abut against the movable part 20 and the limiting washer 50 respectively.

[0055] The handle 70 is rotatably mounted on the sleeve 10 and extends inward into the mounting cavity 101. The handle 70 is screwed to the rear end of the screw 40, causing the screw 40 to move back and forth. In this embodiment, the outer wall of the handle 70 is provided with a scale line 71. The front end of the scale line 71 extends into the rear end of the mounting cavity 101, and the rear end of the scale line 71 protrudes outward from the rear end of the sleeve 10. This allows for a more direct observation of the distance the handle 70 enters the mounting cavity 10, thereby obtaining the compression distance of the second spring 80 and the magnitude of the tension force.

[0056] The second spring 80 is sleeved on the screw 40, and the two ends of the second spring 80 abut against the handle 70 and the limiting washer 50 respectively; in this embodiment, the elastic force of the second spring 80 is greater than the elastic force of the first spring 60.

[0057] The fixing assembly 90 includes a fixing plate 91, two locking members 92, and two locking bolts 93. The fixing plate 90 is annular, with a through groove 901 running through it. Multiple fixing holes 902 are spaced apart along the periphery of the fixing plate 90. Both locking members 92 are securely mounted on the fixing plate 91 and are symmetrically arranged. Each locking member 92 has a fixing groove 903 through which a steel wire passes. The locking members 92 are positioned in conjunction with the front end of the sleeve 10. The two locking bolts 93 are located in the fixing holes 902 and engage with the corresponding locking members 92 for locking. In this embodiment, the locking members 92 have positioning holes 904 that engage with the positioning pins 12. The sleeve 10 is positioned by the engagement of the positioning pins 12 with the positioning holes 904 and the locking members 92.

[0058] The working principle of this embodiment is described in detail below:

[0059] During operation, the fixation plate 91 is first placed on the patient's fracture site, and the two ends of the steel wire extending from the fracture site are pre-fixed by the cooperation of two locking bolts 93 and locking parts 92. Then, one of the locking parts 92 is locked. Next, the front end of the traction device is positioned in conjunction with the other locking part 92, so that the other end of the steel wire extends into the clamping assembly 30 through the feed port 102. The clamping cylinder 31 is moved forward by the third spring 41, which causes the inner wall of the movable cavity 201 to squeeze the steel ball 32 inward, thereby clamping the steel wire. Then, the handle 70 is turned. At this time, the handle 70 will first drive the screw 40 to move backward, and at the same time drive the movable part 20 to move backward. At this time, the movable part 20 and the limiting washer 50 will first compress the first spring 60, so that the steel wire is tightened by the elastic force of the first spring 60. When the elastic force of the first spring 60 is greater than the tension force on the steel wire, the first spring 60 will then release. The screw 40 is limited in the front and rear. When the handle 70 is rotated, the handle 70 will enter the mounting cavity 101 inward, and the second spring 80 will be compressed until the steel wire is tightened to the optimal state. At this time, the tension force on the steel wire is provided by the elastic force generated when the second spring 80 is compressed. The operator can obtain the compression distance of the second spring 80 by extending the handle 70 into the mounting cavity 101, and thus obtain the appropriate tension force according to the elastic coefficient of the spring. When tightening the steel wire, the handle 70 can be screwed into the mounting cavity 101 a specific distance to apply the appropriate tension force to the steel wire. When the steel wire is fully tightened, the other end of the steel wire is also locked and fixed by another locking member 92. Then, by rotating the handle 70 in the opposite direction, the puller is removed from the steel wire. Finally, the two locking members 92 are released from both ends of the steel wire, and the fixing plate 91 is removed.

[0060] The key design feature of this invention is that, by incorporating a movable component, a clamping assembly, a screw, a limiting washer, a first spring, a handle, and a second spring, during the tightening process, the handle first moves the screw and movable component backward, simultaneously compressing the first spring and pre-tensioning the wire. When the first spring's compression force is sufficient, it limits the screw's position. Further rotation of the handle moves it forward toward the screw, compressing the second spring. The second spring's elasticity then tightens the wire, allowing the tension to be determined by the spring's compression length. This facilitates applying appropriate tension to the wire, preventing excessive or insufficient tension. It effectively addresses the issues of insufficient tension leading to internal bone misalignment and surgical failure, and excessive tension reducing wire strength and lifespan, significantly impacting its bone repositioning and fixation strength. Therefore, its overall performance is superior.

[0061] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A medical wire traction device, characterized in that: The device includes a sleeve, a movable component, a clamping assembly, a screw, a limiting washer, a first spring, a handle, a second spring, and a fixing assembly. The sleeve has a mounting cavity with an open rear end, and a limiting boss protrudes inward from the inner wall of the mounting cavity. The front end of the sleeve has a feed inlet communicating with the interior of the mounting cavity. The movable component is movably mounted back and forth within the mounting cavity and has a movable cavity with open ends. The clamping assembly is movably mounted back and forth within the movable cavity and moves back and forth with the movable component; the clamping assembly corresponds to the feed inlet. The screw is movably mounted back and forth within the mounting cavity and drives the movable component to move back and forth; the front end of the screw engages with the rear end opening of the movable cavity. The limiting washer is fitted onto the screw, and its front end abuts against the limiting boss. The first spring is fitted onto the screw, and its two ends abut against the movable component and the limiting washer, respectively. The handle... The device is rotatably mounted on a sleeve and extends into the mounting cavity. The handle is screwed to the rear end of the screw, causing the screw to move back and forth. A second spring is sleeved on the screw, with its two ends abutting between the handle and the limiting washer. The inner wall of the movable cavity is conical, and its diameter increases sequentially from front to back. The clamping assembly includes a clamping cylinder and multiple steel balls. The clamping cylinder has a clamping hole penetrating the front and rear ends of the clamping cylinder, and the outer wall of the clamping hole is also conical, which mates with the inner wall of the movable cavity. The side wall of the clamping hole has mounting holes that connect to the clamping hole, and multiple mounting holes are arranged at equal angles. The steel balls are rotatably mounted in the aforementioned mounting holes, and the outside of the steel balls abuts against the inner wall of the movable cavity. Each steel ball is mounted in a corresponding mounting hole. The front end of the screw is fixed to the rear end of the movable part by screwing and drives the movable part to move back and forth.

2. The medical wire traction device according to claim 1, characterized in that: The front end of the sleeve extends forward integrally with a positioning post, and the aforementioned feed port is located next to the positioning post.

3. The medical wire traction device according to claim 1, characterized in that: The sleeve sidewall is provided with a front-to-back extending limiting groove, and the sidewall of the movable part is provided with a limiting post, which cooperates with the limiting groove and extends inward into the limiting groove.

4. The medical wire traction device according to claim 1, characterized in that: It also includes a third spring that rests between the rear end face of the clamping cylinder and the front end face of the screw.

5. The medical wire traction device according to claim 4, characterized in that: The rear end of the clamping cylinder is integrally recessed inward with a first mounting groove, and the front end of the screw is recessed inward with a second mounting groove. The two ends of the third spring are respectively disposed in the first mounting groove and the second mounting groove, and abut against the bottom surface of the first mounting groove and the second mounting groove.

6. The medical wire traction device according to claim 1, characterized in that: The outer wall of the handle is provided with scale lines, the front end of which extends into the rear end of the mounting cavity, and the rear end of which protrudes outward from the rear end of the sleeve.

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