Bone and soft tissue distractor

Abstract

The invention discloses a bone and soft tissue distractor, which comprises a base fixed on the forearm of an arm, a distractor support bridged on the base and a double-layer structure formed by the base and the distractor support. A first adjusting mechanism is assembled with the distractor support for adjusting the movable part and changing the position of the movable part relative to the finger. A second adjusting mechanism is assembled with the movable part and fixed on the finger, which comprises a second fixing base and a second connecting piece. The main body of the second connecting piece is located in the finger, and the two ends are located outside the finger and assembled with the second fixing base respectively, and arranged along the radial direction of the finger. The distractor has high adaptability to the blood vessel deformity and the limb deformity, can effectively treat the contracture joint, the shortening symptom of the tendon muscle and the nerve tissue, reduces the risk of needle bleeding and improves the recovery speed of the patient.

Description

Technical Field

[0001] This invention relates to a medical device, and more particularly to a tissue traction device, which is advantageous for traction of bone and soft tissues in the correction of vascular malformations combined with limb contracture deformities. Background Technology

[0002] Currently, commonly used external fixators in clinical practice have limitations, such as insufficient fixation stability, susceptibility to pin tract infections, complex operation, and low patient comfort. More importantly, most currently used external fixators are designed for fractures, bone defects, and limb contractures. Applying them to the correction of vascular malformations combined with limb contractures that are prone to bleeding, simple tendon shortening, and / or adhesions presents many limitations, such as causing severe pin tract bleeding, inability to rotate the wrist, long-term functional decline, and longer recovery time.

[0003] To address these issues, it is necessary to develop an instrument for traction of bones and soft tissues, suitable for the correction of vascular malformations combined with limb contractures, in order to improve fixation stability, reduce the risk of infection, simplify the procedure, and enhance patient comfort. Summary of the Invention

[0004] One object of the present invention is to provide a traction device suitable for the correction of vascular malformations combined with limb contractures, wherein the bone and soft tissues are stretched as needed.

[0005] Another objective of this invention is to provide a traction device that is installed on the forearm to help maintain wrist function, facilitate the application of traction to bones and soft tissues as needed, and promote the recovery of corrective injuries.

[0006] A tensioner, comprising:

[0007] The base is fixed to the (patient's) forearm;

[0008] The tension support includes a fixed part and a movable part. The fixed part is bridged on the base and together with the base, they form a double-layer structure.

[0009] The first adjustment mechanism, which is assembled with the tensioning mechanism, is used to adjust the movable part and change the position of the movable part relative to the finger;

[0010] The second adjustment mechanism, which is assembled on the movable part and fixed to the finger at the other end, includes a second fixing seat and a second connecting member;

[0011] The main body of the second connector is located inside the finger, and both ends are located outside the finger, and are respectively assembled with the second fixing seat, arranged radially along the finger.

[0012] It also includes a support component, whose two ends are respectively assembled with the base and the fixing part. The fixing part is bridged on the base, forming a double-layer structure together with the base.

[0013] Fasteners, such as set screws, are also provided to securely fix the second connector (such as a Kirschner wire) mounted on the second fixing seat.

[0014] The movable part has a moving arm and a suspension arm. The two ends of the moving arm are connected to the fixed part and the suspension arm, respectively. The moving arm rotates relative to one end of the fixed part, causing the position of the suspension arm to rise or fall relative to the fixed part.

[0015] The motion arm also includes a first connecting arm and a second connecting arm, which intersect to increase the height difference between the second connecting arm and the main arm. The first connecting arm rotates relative to one end of the fixed part. The second connecting arm is connected to the suspension arm, further increasing the suspension arm's height.

[0016] Another type of tensioner includes:

[0017] The base is fixed to the (patient's) forearm;

[0018] A tension support, comprising a fixed part and a movable part;

[0019] The first adjustment mechanism, which is assembled with the tensioning mechanism, includes a first adjustment rod, a first adjustment member, and a first support base. The two ends of the first support base are respectively connected to the movable part and the first adjustment rod. The first adjustment member assembled on the first adjustment rod is adjusted so that the first adjustment rod moves relative to the first support base.

[0020] The second adjustment mechanism, which is assembled on the movable part and fixed to the finger at the other end, includes a second fixing seat and a second connecting member;

[0021] The main body of the second connector is located inside the finger, and both ends are located outside the finger, and are respectively assembled with the second fixing seat, arranged radially along the finger.

[0022] The first adjustment mechanism also includes a first adjustment seat, which is disposed on the fixed part. The first adjustment member is placed on the first adjustment seat and forms a surface assembly, which facilitates the placement of the first adjustment member and fixes the relative position of the first adjustment rod and the first adjustment member.

[0023] Another type of tensioner includes:

[0024] The base is fixed to the (patient's) forearm;

[0025] The tension support includes a fixed part and a movable part. The fixed part is bridged on the base and together with the base, they form a double-layer structure.

[0026] The first adjustment mechanism, which is assembled with the tensioning mechanism, is used to adjust the movable part and change the position of the movable part relative to the finger;

[0027] The second adjustment mechanism, which is assembled on the movable part and fixed to the finger at the other end, includes a second adjustment rod, a second adjustment member, a second fixed seat, and a second connecting member;

[0028] The main body of the second connector is located inside the finger, and both ends are located outside the finger and are respectively assembled with the second fixed seat, arranged radially along the finger. The other end of the second fixed seat is movably connected to the second adjusting rod. Adjusting the second adjusting member assembled on the second adjusting rod causes the second adjusting rod to move relative to the second adjusting member, thereby pushing or pulling the second fixed seat to raise or lower the position of the finger.

[0029] The second connector also includes a second adjustment cavity, which is disposed in the movable part. The second adjustment member is placed in the second adjustment cavity and forms a surface assembly.

[0030] The second adjusting component also includes an assembly curved surface, which is assembled with the inner surface of the second adjusting cavity, which is also curved, so that the second adjusting component can rotate freely within the second adjusting cavity.

[0031] The second adjusting component also includes an adjusting plane, which is parallel to or intersects the axis of the second adjusting rod, and the resulting angle is greater than 0 degrees and less than 90 degrees.

[0032] The second adjusting rod also includes a connecting cavity with a curved inner surface, which is fitted to the end of a movable tenon located on the second fixed seat, allowing the second fixed seat to rotate within the connecting cavity. A groove is formed in the side wall of the connecting cavity to accommodate the movable tenon, further providing the degree of freedom required for the movement of the second fixed seat relative to the second adjusting rod.

[0033] The beneficial effects of the technical solution of this invention are as follows:

[0034] The traction device provided by this invention is highly adaptable to limb deformities caused by vascular malformations, and can effectively treat contractures, shortening of tendons, muscles and nerve tissues, reduce the risk of needle tract bleeding and improve the speed of patient recovery.

[0035] The traction device provided by this invention arranges Kirschner wires radially to the fingers. On the one hand, it is easy to operate and adjust, facilitating the application of external force to traction the bones and soft tissues. On the other hand, it significantly reduces the pain caused by needle insertion into the fingertips, improves patient compliance and comfort when using such devices, accelerates patient recovery, and effectively reduces or avoids the occurrence of joint function decline caused by prolonged fixation. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of an embodiment of the tensioner of the present invention;

[0037] Figure 2 for Figure 1 A schematic diagram of the tensioner at another angle;

[0038] Figure 3 for Figure 1 A partially enlarged cross-sectional view of the tensioner shown.

[0039] Figure 4 for Figure 1 The diagram shows an embodiment of a stretcher applied to the forearm to perform bone and soft tissue stretching.

[0040] Figure 5 for Figure 4 A diagram from another angle;

[0041] Figure 6 for Figure 1 The diagram shows an enlarged cross-sectional view of the tensioner layout. Detailed Implementation

[0042] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments of the present invention are only used to illustrate the technical solution of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of the invention without departing from the spirit and scope of the technical solution of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention.

[0043] Figure 1 This is a schematic diagram of an embodiment of the tensioner of the present invention. Figure 2 for Figure 1 A schematic diagram of the tensioner at another angle. Figure 4 for Figure 1 The diagram shown illustrates an embodiment of a stretcher applied to the forearm to perform bone and soft tissue stretching. Figure 5 for Figure 4 Another angle of the diagram, Figure 6 for Figure 1 The diagram shows an enlarged cross-sectional view of the tensioner layout. (Refer to...) Figure 4 and Figure 5 ,like Figure 1 , Figure 2 and Figure 6 As shown, the tensioner in this embodiment includes a base 100, a tension support 200, a first adjustment mechanism 300, and a second adjustment mechanism 400. The base 100 is fixed to the forearm, and the tension support 200 is mounted on the base 100. The two ends of the support member 500 are respectively assembled with the base 100 and the tension support 200, forming a double-layer structure. The lower layer is bounded by the base 100, and the upper layer is bounded by the tension support 200, with an open space in between, serving as the operating space for the tension support 200.

[0044] The tension support 200 includes a fixed part 210 and a movable part 220. The fixed part 210 is assembled with the base 100, that is, one end of the support member 500 is installed on the fixed part 210, so that the support member 500 supports the fixed part 210 to prevent it from falling onto the base 100. This allows the fixed part 210 to bridge the base 100, forming a double-layer structure, with the space between them serving as the operating space for the tension support 200. The movable part 220 includes a moving arm 221 and a suspension arm 222. The two ends of the moving arm 221 are connected to the fixed part 210 and the suspension arm 222, respectively. The moving arm 221 is movably connected to the fixed part 210. The moving arm 221 rotates relative to one end of the fixed part 210 (e.g., planar fixed-axis rotation), causing the position of the suspension arm 222 to rise or fall relative to the fixed part 210. The moving arm 221 moves relative to one end of the fixed part 210, causing the position of the suspension arm 222 to move away from or closer to the fixed part 210.

[0045] The motion arm 221 also includes a first connecting arm 2211 and a second connecting arm 2212, which intersect to increase the height difference between the second connecting arm 2212 and the arm. One end of the first connecting arm 2211 is disposed at the fixed part 210 and can rotate relative to one end of the fixed part 210 (e.g., planar fixed-axis rotation). The second connecting arm 2212 is connected to the suspension arm 222, further increasing the suspension height of the suspension arm 222.

[0046] The first adjustment mechanism 300 is used to adjust the tension support, changing the position of the tension support relative to the finger, that is, adjusting the position of the movable part 220 relative to the finger. It includes a first adjustment rod 310, a first adjustment member 320, a first adjustment seat 330, and a first support seat 340. The two ends of the first support seat 340 are respectively connected to the moving arm 221 and the first adjustment rod 310. The first support seat 340 rotates relative to one end of the first adjustment rod 310 (e.g., planar fixed-axis rotation). Operating the first adjustment rod 310 to extend or retract pushes or pulls the moving arm 221, thereby causing the moving arm 221 to rotate relative to one end of the fixed part 210 (e.g., planar fixed-axis rotation), resulting in the suspension arm 222 rising or falling relative to the fixed part 210.

[0047] The first adjusting seat 330 is disposed on the fixed part 210 and includes a first adjusting cavity 331. The first adjusting member 320 is disposed in the first adjusting cavity 331 and forms a surface assembly. The first adjusting member 320, which is mounted on the first adjusting rod 310, is adjusted so that the connection between the first adjusting rod 310 and the first support seat 340 is moved away from or closer to the first support seat 340.

[0048] The first adjusting member 320 includes an assembly curved surface 321 (e.g., a spherical surface), which is assembled with the inner surface of the first adjusting cavity 331, which is also curved, so that the first adjusting member 320 can rotate freely within the first adjusting cavity 331. The first adjusting member 320 is threadedly assembled with the first adjusting rod 310. Rotating the first adjusting member 320 causes the connection between the first adjusting rod 310 and the first support 340 to move away from or closer to the first support 340 relative to the first support 340, thereby driving the moving arm 221 to rotate relative to one end of the fixed part 210 (e.g., planar fixed-axis rotation), so that the position of the suspension arm 222 rises or falls relative to the fixed part 210.

[0049] The first adjusting member 320 also includes an adjusting plane 322, which is parallel to or intersects the axis of the first adjusting rod 310, forming an angle greater than 0 degrees and less than 90 degrees. When a finger or tool (such as a wrench) is applied to the adjusting plane, the first adjusting member 320 rotates within the first adjusting cavity 331, causing the connection between the first adjusting rod 310 and the first support base 340 to move away from or closer to the first support base 340.

[0050] The second adjustment mechanism 400 is assembled with the suspension arm 222, one end of which is also connected to the finger. When the position of the suspension arm 222 rises or falls relative to the fixed part 210, it drives the second adjustment mechanism 400 to move, thereby achieving traction on the finger bones and soft tissues.

[0051] The second adjustment mechanism 400 includes a second adjustment rod 410, a second adjustment member 420, a second fixing seat 430, a second connector 440, and a second adjustment cavity 450. The main body of the second connector 440 is located inside the finger (bone or soft tissue), with both ends located outside the finger, and each end is assembled to one end of the second fixing seat 430, so that the second connector 440 is arranged radially to the finger. This changes the mechanism of bone and soft tissue traction, the intensity and direction of force, making it more conducive to wrist joint movement and the correction of vascular malformations combined with limb contractures. The other end of the second fixing seat 430 is movably connected to the second adjustment rod 410, providing the second fixing seat 430 with freedom of movement relative to the second adjustment rod 410.

[0052] The second adjustment cavity 450 is disposed on the suspension arm 222, and the second adjustment member 420 is disposed in the second adjustment cavity 450, forming a surface assembly. The second adjustment member 420, which is mounted on the second adjustment rod 410, is adjusted so that the second adjustment rod 410 moves relative to the second adjustment member 420, thereby pushing / pulling the second fixing seat 430 to raise or lower the position of the fingers, and adjust the positional relationship between the fingers and each finger joint as needed to achieve the correction of vascular malformation combined with limb contracture deformity.

[0053] Figure 3 for Figure 1 A partially enlarged cross-sectional view of the tensioner shown. (Combined with...) Figure 1,like Figure 3 As shown, the second adjusting member 420 includes an assembly curved surface 421 (e.g., a spherical surface), which is assembled with the inner surface of the second adjusting cavity 450, which is also curved, allowing the second adjusting member 420 to rotate freely within the second adjusting cavity 450. The second adjusting member 420 is threadedly assembled with the second adjusting rod 410. Rotating the second adjusting member 420 causes the second adjusting rod 410 to move relative to the second adjusting member 420, thereby adjusting the position of the second fixing seat 430 according to the need for traction, such as raising or lowering it, to correct vascular malformations combined with limb contractures.

[0054] The second adjusting member 420 also includes an adjusting plane 422, which is parallel to or intersects the axis of the second adjusting rod 410, and the angle between them is greater than 0 degrees and less than 90 degrees. When a finger or tool (such as a wrench) is applied to the adjusting plane, the second adjusting member 420 is rotated within the second adjusting cavity 450, thereby moving the second adjusting member 420 axially along the second adjusting rod 410.

[0055] The second adjusting rod 410 also includes a connecting cavity 411, the inner surface of which is provided with a curved surface (e.g., a spherical surface) to assemble with the end of the movable tenon 431 provided in the second fixing seat 430. For example, a curved surface assembly is formed at the assembly point, allowing the second fixing seat 430 to rotate within the connecting cavity 411. A groove 412 is formed in the side wall of the connecting cavity 411 to accommodate the movable tenon 431, further providing the degree of freedom (e.g., Z-axis) required for the movement of the second fixing seat 430 relative to the second adjusting rod 410, adapting to the clinical need for bone and soft tissue traction, and facilitating the correction of vascular malformations combined with limb contracture deformities.

[0056] Fasteners 600, such as set screws, are also provided to securely fix the second connector 440 (e.g., Kirschner wire) mounted on the second fixing seat 430, preventing deviation or slippage after tensioning, and facilitating the radial arrangement of the second connector 440 in the shape of fingers, the application of external forces, and the implementation of tensioning of bone and soft tissue.

Claims

1. A tensioner, characterized in that... include: The base is fixed to the forearm of the arm; The tension support includes a fixed part and a movable part. The fixed part is bridged on the base and together with the base forms a double-layer structure. The movable part includes a moving arm and a suspension arm. The two ends of the moving arm are respectively connected to the fixed part and the suspension arm. The moving arm is movably connected to the fixed part. The moving arm rotates relative to one end of the fixed part, so that the position of the suspension arm rises or falls relative to the fixed part. The support component is assembled with the base and the fixing part at its two ends respectively. The fixing part is bridged on the base and together with the base, it forms a double-layer structure. The first adjustment mechanism, which is assembled with the tensioning mechanism, is used to adjust the movable part and change the position of the movable part relative to the finger; it includes a first adjustment rod, a first adjustment member, a first adjustment seat and a first support seat, with the two ends of the first support seat connected to the moving arm and the first adjustment rod respectively; the first adjustment seat is disposed on the fixed part, and the first adjustment member is placed on the first adjustment seat and forms a surface assembly; Adjust the first adjusting member mounted on the first adjusting rod, so that the first adjusting rod moves relative to the first support seat; The second adjustment mechanism, which is mounted on the suspension arm and fixed to the finger at the other end, includes a second adjustment rod, a second adjustment member, a second fixing seat, and a second connecting member. The main body of the second connecting member is located inside the finger, and both ends are located outside the finger, and are respectively mounted to one end of the second fixing seat, so that the second connecting member is arranged radially along the finger. The other end of the second fixing seat is movably connected to the second adjustment rod, adjusting the second adjustment member mounted on the second adjustment rod, so that the second adjustment rod moves relative to the second adjustment member, thereby pushing or pulling the second fixing seat to raise or lower the position of the finger. The suspension arm is provided with a second adjustment cavity, and a second adjustment component is placed in the second adjustment cavity to form a surface assembly; The second adjusting member further includes: The assembly surface is assembled with the inner surface of the second adjustment cavity, which is also curved, so that the second adjustment component can rotate freely within the second adjustment cavity; The connecting cavity has a curved surface on its inner surface, which is assembled with the end of the movable tenon provided on the second fixed seat, so that the second fixed seat can rotate in the connecting cavity. A groove is opened in the side wall of the connecting cavity to accommodate the movable tenon and provide the Z-axis degree of freedom required for the movement of the second fixed seat relative to the second adjusting rod. An adjustment plane is parallel to or intersects the axis of the second adjustment rod. When a finger or tool is applied to the adjustment plane, the second adjustment element rotates within the second adjustment cavity, thereby moving the second adjustment element along the axial direction of the second adjustment rod. Fasteners that secure the second connector mounted on the second mounting base.

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