Bone and soft tissue distractor

Abstract

A bone and soft tissue distraction device comprises a base fixed on a forearm of an arm, and a distraction support is bridged on the base and forms a double-layer structure together with the base. The second adjusting mechanism is assembled on the movable part, the other end of the second adjusting mechanism is fixed to the finger, the second adjusting mechanism comprises a second fixing base and a second connecting piece, the main body part of the second connecting piece is located inside the finger, and the two ends of the second connecting piece are located outside the finger; the first fixing seat and the second fixing seat are assembled and arranged in the radial direction of the fingers. The distraction device provided by the invention has high adaptability to limb deformity accompanied by vascular deformity, and can effectively treat the shortening symptoms of contracture joints, tendons, muscles and nervous tissues, reduce the risk of needle passage bleeding and improve the rehabilitation speed of patients.

Description

Technical Field

[0001] The invention relates to a medical device, in particular to a tissue stretcher, which is beneficial for traction of bones and soft tissues in the correction of vascular malformation combined with limb contracture deformity. Background Art

[0002] At present, the external fixators commonly used in clinical practice have limitations in application, such as insufficient fixation stability, easy to cause pin tract infection, complicated operation, low patient comfort, etc. More importantly, the external fixators currently used are mostly designed for fractures, bone defects and limb contractures, and are used to correct vascular malformations that are prone to bleeding, simple tendon shortening and / or adhesions combined with limb contracture deformities. There are many limitations, such as causing severe pin tract bleeding, inability to rotate the wrist, long-term functional decline, and longer recovery time.

[0003] To solve these problems, it is necessary to propose an instrument for traction of bones and soft tissues, which is suitable for the correction of vascular malformations combined with limb contracture deformities, so as to improve fixation stability, reduce the risk of infection, simplify the operation process, and improve patient comfort. Summary of the invention

[0004] One object of the present invention is to provide a distractor suitable for the correction of vascular malformation combined with limb contracture deformity, and to distract bones and soft tissues as needed.

[0005] Another object of the present invention is to provide a distraction device installed on the forearm, which is beneficial to maintaining wrist function, distracting bones and soft tissues as needed, and promoting corrective recovery.

[0006] A distraction device, comprising:

[0007] A base, which is fixed on the forearm of the (patient's) arm;

[0008] The distraction bracket comprises a fixed part and a movable part, wherein the fixed part is bridged on the base and forms a double-layer structure together with the base;

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

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

[0011] The main body of the second connecting member is located inside the finger, and the two ends are located outside the finger and are respectively assembled with the second fixing seats, and are arranged radially along the finger.

[0012] It also includes a support member, two ends of which are respectively assembled with the base and the fixing part. The fixing part is bridged on the base to form a double-layer structure together with the base.

[0013] A fastener, such as a top screw, is also provided to firmly fix the second connecting member (such as a Kirschner wire) assembled on the second fixing seat.

[0014] The movable part comprises a moving arm and a suspension arm, wherein two ends of the moving arm are respectively connected to the fixed part and the suspension arm, and 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.

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

[0016] Another type of distraction device includes:

[0017] A base, which is fixed on the forearm of the (patient's) arm;

[0018] A distraction stent, comprising a fixed portion and a movable portion;

[0019] A first adjustment mechanism, which is assembled with the tensioning mechanism, comprises a first adjustment rod, a first adjustment member and a first support seat, wherein both ends of the first support seat are respectively connected with the movable portion and the first adjustment rod, and the first adjustment member assembled on the first adjustment rod is adjusted to make the first adjustment rod move relative to the first support seat;

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

[0021] The main body of the second connecting member is located inside the finger, and the two ends are located outside the finger and are respectively assembled with the second fixing seats, and are arranged radially along the finger.

[0022] The first adjustment mechanism also includes a first adjustment seat, which is arranged on the fixing part. The first adjustment member is arranged on the first adjustment seat to form a surface assembly, which is convenient for arranging the first adjustment member and fixing the relative position of the first adjustment rod and the first adjustment member.

[0023] Another type of distraction device includes:

[0024] A base, which is fixed on the forearm of the (patient's) arm;

[0025] The distraction bracket comprises a fixed part and a movable part, wherein the fixed part is bridged on the base and forms a double-layer structure together with the base;

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

[0027] A second adjustment mechanism, which is assembled on the movable part and has the other end fixed to the finger, comprises a second connecting rod, a second adjusting member, a second fixing seat and a second connecting member;

[0028] The main part of the second connecting member is located inside the finger, and the two ends are located outside the finger, and are respectively assembled with the second fixing seat, and are arranged radially along the finger. The other end of the second fixing seat is movably connected to the second adjusting rod. The second adjusting member assembled on the second adjusting rod is adjusted to move the second adjusting rod relative to the second adjusting member, thereby pushing or pulling the second fixing seat to raise or lower the position of the finger.

[0029] The second connecting member also includes a second adjusting cavity, which is arranged in the movable part. The second adjusting member is arranged in the second adjusting cavity to form a surface assembly.

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

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

[0032] The second adjusting rod also includes a connecting cavity, the inner surface of which is provided with a curved surface, which is assembled with the end of the movable tenon provided on the second fixing seat, so that the second fixing seat can rotate in the connecting cavity. A groove is provided on the side wall of the connecting cavity, which is used to place the movable tenon to further provide the second fixing seat with the required degree of freedom for movement relative to the second adjusting rod.

[0033] Beneficial effects achieved by the technical solution of the present invention:

[0034] The distraction device provided by the present invention has high adaptability to limb deformities complicated by vascular malformations, can effectively treat contracted joints, shortening symptoms of tendons, muscles and nerve tissues, reduce the risk of needle tract bleeding, and improve the patient's recovery speed.

[0035] The distraction device provided by the present invention arranges the Kirschner wires radially of the fingers. On the one hand, it is easy to operate and adjust, which is beneficial to the application of external force to stretch the bones and soft tissues. On the other hand, it significantly reduces the pain caused by needle insertion at the fingertips, improves the compliance and comfort of patients in using such instruments, speeds up the recovery of patients, and effectively reduces or avoids the occurrence of joint movement dysfunction caused by long-term fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of an embodiment of a distractor of the present invention;

[0037] Figure 2 for Figure 1 A schematic diagram of the distractor from another angle;

[0038] Figure 3 for Figure 1 A partial cross-sectional enlarged schematic diagram of the distractor shown;

[0039] Figure 4 for Figure 1 The distractor shown is a schematic diagram of an embodiment of applying the distractor to the forearm to perform bone and soft tissue distraction;

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

[0041] Figure 6 for Figure 1 The diagram shown is an enlarged schematic cross-sectional view of the distractor layout. DETAILED DESCRIPTION

[0042] The technical solution of the present invention is 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 rather than to limit it. Although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

[0043] Figure 1 is a schematic diagram of an embodiment of the distractor of the present invention, Figure 2 for Figure 1 A schematic diagram of the distractor from another angle is shown. Figure 4 for Figure 1 The distractor shown is a schematic diagram of an embodiment of applying the distractor to the forearm to perform bone and soft tissue distraction. Figure 5 for Figure 4 A diagram from another angle. Figure 6 for Figure 1 The layout of the distractor is shown in the enlarged cross-sectional view. Figure 4 and Figure 5 ,like Figure 1 , Figure 2 and Figure 6 As shown, the distractor of this embodiment includes a base 100, a distraction bracket 200, a first adjustment mechanism 300 and a second adjustment mechanism 400. The base 100 is fixed on the forearm, and the distraction bracket 200 is installed on the base 100. The two ends of the support member 500 are respectively assembled with the base 100 and the distraction bracket 200 to form a double-layer structure, with the lower layer bounded by the base 100 and the upper layer bounded by the distraction bracket 200, and the space between them is suspended as the operating space of the distraction bracket 200.

[0044] The tensioning bracket 200 includes a fixed portion 210 and a movable portion 220. The fixed portion 210 is assembled with the base 100, that is, one end of the support member 500 is installed on the fixed portion 210, and the support member 500 supports the fixed portion 210 to prevent it from overlapping the base 100, so that the fixed portion 210 is bridged on the base 100 to form a double-layer structure, and the space between the two layers serves as the operating space of the tensioning bracket 200. The movable portion 220 includes a moving arm 221 and a suspension arm 222. The two ends of the moving arm 221 are connected to the fixed portion 210 and the suspension arm 222 respectively. The moving arm 221 is movably connected to the fixed portion 210. The moving arm 221 rotates relative to one end of the fixed portion 210 (for example: plane fixed axis rotation), so that the position of the suspension arm 222 rises or falls relative to the fixed portion 210. The moving arm 221 moves relative to one end of the fixed portion 210, so that the position of the suspension arm 222 moves away from or close to the fixed portion 210.

[0045] The motion arm 221 further includes a first connecting arm 2211 and a second connecting arm 2212. The first connecting arm 2211 and the second connecting arm 2212 intersect each other to increase the height difference between the second connecting arm 2212 and the arm. One end of the first connecting arm 2211 is disposed on the fixed portion 210 and rotates relative to one end of the fixed portion 210 (e.g., plane fixed axis rotation). The second connecting arm 2212 is connected to the suspension arm 222 to further increase the height of the suspension arm 222.

[0046] The first adjustment mechanism 300 is used to adjust the distraction bracket, change the position of the distraction bracket relative to the finger, that is, adjust 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, and the first support seat 340 rotates relative to one end of the first adjustment rod 310 (for example: plane fixed axis rotation). The first adjustment rod 310 is extended or shortened, so that the first adjustment rod 310 pushes or pulls the moving arm 221, thereby rotating the moving arm 221 relative to one end of the fixed part 210 (for example: plane fixed axis rotation), so that the position of the suspension arm 222 rises or falls relative to the fixed part 210.

[0047] The first adjustment seat 330 is disposed on the fixing portion 210 and includes a first adjustment cavity 331. The first adjustment member 320 is disposed in the first adjustment cavity 331 to form a surface assembly. The first adjustment member 320 assembled on the first adjustment rod 310 is adjusted to move the connection between the first adjustment rod 310 and the first support seat 340 away from or close 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 a curved surface, so that the first adjusting member 320 can rotate freely in the first adjusting cavity 331. The first adjusting member 320 is threadedly assembled with the first adjusting rod 310, and the first adjusting member 320 is rotated to move the connection between the first adjusting rod 310 and the first support seat 340 away from or close to the first support seat 340, thereby driving the moving arm 221 to rotate relative to one end of the fixed portion 210 (e.g., plane fixed axis rotation), so that the position of the suspension arm 222 rises or falls relative to the fixed portion 210.

[0049] The first adjusting member 320 further includes an adjusting plane 322, which is parallel to or intersects the axis of the first adjusting rod 310, and the angle formed therebetween is greater than 0 degrees and less than 90 degrees. The first adjusting member 320 is rotated in the first adjusting cavity 331 by applying a finger or a tool (such as a wrench) on the adjusting plane, so that the connection between the first adjusting rod 310 and the first supporting seat 340 moves away from or closer to the first supporting seat 340.

[0050] The second adjustment mechanism 400 is assembled with the suspension arm 222, and one end of the second adjustment mechanism 400 is also connected to the finger. When the position of the suspension arm 222 rises or falls relative to the fixing part 210, the second adjustment mechanism 400 is driven to move, thereby pulling the finger bones and soft tissues.

[0051] The second adjustment mechanism 400 includes a second connecting rod 410, a second adjusting member 420, a second fixing seat 430, a second connecting member 440 and a second adjustment chamber 450. The main part of the second connecting member 440 is located inside the finger (bone or soft tissue), and the two ends are located outside the finger and are respectively assembled with one end of the second fixing seat 430, so that the second connecting member 440 is arranged radially of the finger, thereby changing the mechanism of bone and soft tissue stretching, the force intensity and the force direction, which is more conducive to the movement of the wrist joint and the correction of vascular malformation combined with limb contracture deformity. The other end of the second fixing seat 430 is movably connected to the second adjusting rod 410, providing the second fixing seat 430 with the freedom of movement relative to the second adjusting rod 410.

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

[0053] Figure 3 for Figure 1 The partial cross-sectional enlarged schematic diagram of the distractor is shown. Figure 1,like Figure 3 As shown, the second adjusting member 420 includes an assembly curved surface 421 (such as a spherical surface), which is assembled with the inner surface of the second adjusting cavity 450 which is also a curved surface, so that the second adjusting member 420 can rotate freely in the second adjusting cavity 450. The second adjusting member 420 is threadedly assembled with the second adjusting rod 410, and the second adjusting member 420 is rotated to make the second adjusting rod 410 and the second adjusting member 420 move relative to each other, and then the second fixing seat 430 is convenient for adjusting the position of the finger or finger joint according to the need of stretching, such as rising or falling, to achieve the correction of vascular malformation combined with limb contracture deformity.

[0054] The second adjusting member 420 further includes an adjusting plane 422, which is parallel to or intersects the axis of the second adjusting rod 410, and the angle formed therebetween is greater than 0 degrees and less than 90 degrees. The second adjusting member 420 is rotated in the second adjusting cavity 450 by applying a finger or a tool (such as a wrench) on the adjusting plane, so as to realize the axial movement of the second adjusting member 420 along the second adjusting rod 410.

[0055] The second adjustment rod 410 also includes a connection cavity 411, and a curved surface (such as a spherical surface) is provided on the inner surface of the cavity, which is assembled with the end of the movable tenon 431 provided on the second fixing seat 430, for example, a curved surface is formed at the assembly position, so that the second fixing seat 430 can rotate in the connection cavity 411. A groove 412 is provided on the side wall of the connection cavity 411, which is used to place the movable tenon 431 to further provide the second fixing seat 430 with the required degree of freedom (such as the Z axis) for the movement relative to the second adjustment rod 410, so as to meet the clinical demand for bone and soft tissue stretching and facilitate the correction of vascular malformation combined with limb contracture deformity.

[0056] A fastener 600, such as a top screw, is also provided to firmly fix the second connecting member 440 (such as a Kirschner wire) assembled on the second fixing seat 430 to avoid deviation or slippage after being stretched, and to facilitate the radial arrangement of the second connecting member 440 of the finger, the application of external force, and the implementation of bone and soft tissue stretching.

Claims

1. A distraction device, characterized in that include: a base, which is fixed to the forearm of the arm; The distraction bracket comprises a fixed part and a movable part, wherein the fixed part is bridged on the base and forms a double-layer structure together with the base; A first adjustment mechanism, which is assembled with the stretching mechanism and is used to adjust the movable part to change the position of the movable part relative to the finger; A second adjustment mechanism, which is assembled on the movable part and has the other end fixed on the finger, and includes a second fixing seat and a second connecting member; The main body of the second connecting member is located inside the finger, and the two ends are located outside the finger and are respectively assembled with the second fixing seats, and are arranged radially along the finger.

2. The distractor according to claim 1, characterized in that It also includes a support member, two ends of which are respectively assembled with the base and the fixing part. The fixing part is bridged on the base to form a double-layer structure together with the base.

3. The distractor according to claim 1, characterized in that A fastener is also provided to fix the second connecting member assembled on the second fixing seat.

4. The distractor according to claim 1, characterized in that The first adjustment mechanism includes a first adjustment rod, a first adjustment member and a first support seat. The two ends of the first support seat are respectively connected to the movable part and the first adjustment rod. The first adjustment member assembled on the first adjustment rod is adjusted to make the first adjustment rod move relative to the first support seat.

5. The distractor according to claim 4, characterized in that It also includes a first adjustment seat, which is arranged on the fixing part. The first adjustment member is arranged on the first adjustment seat to form a surface assembly.

6. The distractor according to claim 1, characterized in that The second adjustment mechanism comprises a second connecting rod, a second adjusting member, a second fixing seat and a second connecting member; The other end of the second fixing seat is movably connected to the second adjusting rod. The second adjusting member assembled on the second adjusting rod is adjusted to move the second adjusting rod relative to the second adjusting member, thereby pushing or pulling the second fixing seat to raise or lower the position of the finger.

7. The distractor according to claim 6, characterized in that It also includes a second adjustment cavity, which is arranged on the movable part. The second adjustment member is arranged in the second adjustment cavity to form a surface assembly.

8. The distractor according to claim 6, characterized in that The second adjusting member also includes an assembly curved surface, which is assembled with the inner surface of the second adjusting cavity which is also a curved surface, so that the second adjusting member can rotate freely in the second adjusting cavity.

9. The distractor according to claim 6, characterized in that The second adjusting rod also includes a connecting cavity, the inner surface of which is provided with a curved surface, which is assembled with the end of the movable tenon provided on the second fixing seat, so that the second fixing seat can rotate in the connecting cavity.

10. The distractor according to claim 9, characterized in that A groove is provided on the side wall of the connecting cavity for accommodating the movable tenon, thereby providing the second fixing seat with the required degree of freedom for movement relative to the second adjusting rod.

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