A distraction or compression device for surgical reduction of limb fractures

Abstract

The utility model relates to medical instrument technical field, specifically disclose a kind of distraction or pressurizing device for four limbs fracture operation reduction, comprising: first support and second support, first support and second support middle part swing joint;Catheter, the cavity that can be inserted metal bone needle is inside in the catheter;Connecting rod, one end of the connecting rod is fixedly embedded with the end of catheter, and the other end is ball head;Ball seat, ball seat lower part is fixedly installed in the end of first support or second support, and the ball head of connecting rod end portion is placed in ball seat;Locking nut, locking nut is threadedly connected with ball seat upper part, and ball head is fixed in ball seat.The utility model is suitable for more extensive fracture situation, can realize the two functions of distraction or pressurizing without the restriction of instrument itself;The angle of catheter and support can be adjusted to solve the obstruction of instrument to operator during operation, and the obstruction of instrument when C-arm perspective, convenient to observe reduction condition during operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a dispersing or pressurizing device for surgical reduction of limb fractures. Background Technology

[0002] Limb fractures (bodies and intra-articular fractures) account for a large proportion of fracture patients and can be seen in various types of trauma patients. After injury, the imbalance of muscle traction at both ends of the fracture leads to shortening and displacement of the fracture ends. When the fracture ends occur at the articular surface, intra-articular fractures occur, resulting in articular surface collapse. Conventional surgical treatment requires reduction of the fracture under manual traction, demanding continuous and uniform traction rather than forceful traction, which places high demands on the surgeon. Existing traction devices directly manipulate the fracture ends through the structure on the support frame, and are therefore greatly limited by the device itself, only able to achieve a single function of dispersing or compressing, which cannot meet the surgical needs of various fracture patients. In addition, during the operation, a C-arm fluoroscopy machine is generally used to observe the reduction, but because the connection between the dispersing rod and the main support frame of the traction device is fixed at 90 degrees and cannot be adjusted, it will obstruct the fluoroscopy of the C-arm, making subsequent intraoperative operations and fluoroscopy inconvenient. Utility Model Content

[0003] The purpose of this invention is to provide a dispersing or pressurizing device for the reduction of limb fractures that does not affect subsequent surgical operations or obstruct intraoperative C-arm fluoroscopy, and facilitates intraoperative observation of the reduction status.

[0004] This utility model is achieved through the following technical solution: a dispersing or pressurizing device for surgical reduction of limb fractures, comprising: A first bracket and a second bracket, wherein the first bracket and the second bracket are movably hinged at the middle; A catheter having an internal cavity capable of inserting a metal bone needle; A connecting rod, one end of which is fixedly embedded in the end of the conduit, and the other end is a ball head; A ball seat, the lower part of which is fixedly installed at the end of the first or second bracket, with the ball head at the end of the connecting rod placed inside the ball seat; A locking nut is threaded to the upper part of the ball seat and fixes the ball head inside the ball seat.

[0005] The working principle of this technical solution is to apply pressure or open up the fracture ends by setting up a catheter with nested metal bone pins. Due to the medium of metal bone pins, it is not limited to the single function of opening or applying pressure due to the limitations of the instrument itself. Instead, it can perform both opening and pressure operations on the fracture ends. In addition, the cooperation between the ball head at the connecting rod and the ball seat at the end of the support allows for multi-angle joint adjustment of the catheter and the support. By adjusting the angle of the catheter and the support, the obstruction of the instrument to the surgeon during the operation and the obstruction of the instrument to C-arm fluoroscopy can be solved, which facilitates the observation of the reduction during the operation and allows the doctor to perform the operation better for the patient.

[0006] To better realize this utility model, it further includes: A pull rod, one end of which is hinged to the inner side of the first support, and the other end of which passes through the end of the second support and extends out of the second support; the end of the first support to which the pull rod is hinged is the end away from the conduit, and the end of the pull rod passing through the second support is the end away from the conduit; Two fixing nuts are threaded onto the tie rod, one fixing nut being located between the first bracket and the second bracket, and the other fixing nut being located outside the second bracket.

[0007] To better realize this utility model, the second support is further provided with a sliding groove at the end away from the conduit. The pull rod passes through the sliding groove into the second support. When the pull rod is not fixed by the fixing nut, it can swing in the sliding groove.

[0008] To better realize this utility model, a clamping ring is further installed inside the ball seat, and the ball head of the connecting rod is fixed inside the ball seat by the cooperation of the locking nut and the clamping ring.

[0009] To better realize this utility model, a threaded hole is provided on one side of the ball seat, and a locking screw is internally threaded thereon. The side of the locking screw abuts against the lower part of the clamping ring placed inside the ball seat.

[0010] To better realize this utility model, the locking screw is further described as a cylindrical head internal hexagon waterproof screw.

[0011] To better realize this utility model, the catheter is further provided with at least two cavities of different thicknesses that match metal bone needles of different sizes, and the axis of each cavity is parallel to the axis of the catheter.

[0012] To better realize this utility model, a cylindrical pin with a vertical axis is further inserted between the conduit and the connecting rod, and the cylindrical pin is welded to the conduit and the connecting rod.

[0013] To better realize this utility model, further, taking the hinge point of the first support and the second support as a reference, the first support and the second support are in an outwardly expanding arc shape on the side near the conduit, and the arc shape of the first support and the second support can form an unclosed O-ring.

[0014] To better realize this utility model, the surface of the locking nut is further provided with friction texture.

[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects: (1) This utility model provides a conduit that works with metal bone needles at the ends of the first and second supports. In this way, metal bone needles of different sizes can be used through the conduit. Due to the presence of metal bone needles as a medium, it is applicable to a wider range of fracture situations. It is not limited to a single function of opening or pressing due to the limitations of the instrument itself. Instead, it can both open the fracture ends and press the fracture ends. (2) This utility model realizes multi-angle joint adjustment of the catheter and the stent by cooperating the ball head at the connecting rod and the ball seat at the stent end. By adjusting the angle of the catheter and the stent, the obstruction of the instruments to the surgeon during the operation and the obstruction of the instruments to the C-arm fluoroscopy can be solved, which facilitates the observation of the repositioning situation during the operation. (3) The structure of this utility model is reasonable and the functions are complete. It can solve the technical defects of existing instruments. Samples have been produced and clinical use has begun. Mass production will follow. It can enable orthopedic surgeons to perform surgery on fracture patients better and bring good news to surgical patients. Attached Figure Description

[0016] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the planar structure of the present invention; Figure 3 This is a cross-sectional view of the opening mechanism A_A in this utility model.

[0017] Wherein: 1—first bracket, 2—second bracket, 3—conduit, 4—connecting rod, 5—ball seat, 6—locking nut, 7—pull rod, 8—fixing nut, 9—pressure ring, 10—locking screw, 11—cylindrical pin, 12—sliding groove. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly including one or more of the feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Example 1: The main structure of this embodiment is as follows: Figures 1-3 As shown, it includes: First support 1 and second support 2, the first support 1 and the second support 2 are movably hinged at the middle; The conduit 3 has a cavity inside which a metal bone needle can be inserted; Connecting rod 4, one end of which is fixedly embedded in the end of the conduit 3, and the other end is a ball head; Ball seat 5, the lower part of which is fixedly installed at the end of the first bracket 1 or the second bracket 2, and the ball head at the end of the connecting rod 4 is placed inside the ball seat 5; The locking nut 6 is threaded to the upper part of the ball seat 5 and fixes the ball head of the connecting rod 4 inside the ball seat 5.

[0022] Initially, the catheter 3 is fixed at one end to the connecting rod 4, and the locking nut 6 is fitted onto the connecting rod 4. The ball seat 5 can be integrated with the first support 1 and the second support 2. During use, the ball end of the connecting rod 4 is first placed inside the ball seat 5, and then the locking nut 6 is threaded onto the upper part of the ball seat 5. At this time, the locking nut 6 is not tightened, and the ball end of the connecting rod 4 can still rotate inside the ball seat 5. During the operation, metal bone needles of appropriate size are first drilled into both sides of the fracture ends, and then the metal bone needles are inserted into the cavity on the catheter 3. After determining the position of the catheter 3, the locking nut 6 is tightened so that the ball end of the connecting rod 4 placed inside the ball seat 5 can no longer rotate. Then, the fracture ends are opened or compressed by pressing or spreading the first support 1 and the second support 2, so that the surgeon can easily reduce the fracture. During the operation, the angle of the joint at the connection between the spreading rod and the main support can be adjusted so as not to affect subsequent surgical operations or obstruct intraoperative C-arm fluoroscopy, facilitating intraoperative observation of the reduction.

[0023] Example 2: This embodiment, based on the above embodiment, further adds a pull rod 7, such as... Figure 1 , Figure 2 As shown, A pull rod 7, one end of which is hinged to the inner side of the first support 1, and the other end of which passes through the end of the second support 2 and extends out of the second support 2; the end of the first support 1 to which the pull rod 7 is hinged is the end away from the conduit 3, and the end of the pull rod 7 that passes through the second support 2 is the end away from the conduit 3; Two fixing nuts 8 are threadedly installed on the tie rod 7. One fixing nut 8 is located between the first bracket 1 and the second bracket 2, and the other fixing nut 8 is located on the outside of the second bracket 2.

[0024] The purpose of the pull rod 7 is to fix the relative position of the first support 1 and the second support 2. Two fixing nuts 8 are rotated on the pull rod 7 to clamp the second support 2 from both sides. The fixing nuts 8 on both sides of the second support 2 can also be used to fine-tune the position between the first support 1 and the second support 2, thereby allowing the guide rod 3 to spread or compress the fracture ends via the metal bone graft, achieving precise operation. The other parts of this embodiment are the same as those in the above embodiment and will not be repeated.

[0025] Example 3: This embodiment, based on the above embodiment, defines the relationship between the second frame 2 and the pull rod 7, such as... Figure 1 , Figure 2As shown, the second support 2 has a sliding groove 12 inside at the end away from the conduit 3. The pull rod 7 passes through the sliding groove 12 and can swing within the sliding groove 12 when not fixed by the fixing nut 8. The pull rod 7's ability to swing within the sliding groove 12 allows for more flexible fixing of the second support 2, ensuring positional stability between the first support 1 and the second support 2. Other parts of this embodiment are the same as those in the above embodiment and will not be repeated.

[0026] Example 4: This embodiment, based on the above embodiment, adds a clamping ring 9. The clamping ring 9 is also installed inside the ball seat 5. The ball head of the connecting rod 4 is fixed inside the ball seat 5 by the engagement of the locking nut 6 and the clamping ring 9. The main function of the clamping ring 5 is to fix the ball head end of the connecting rod 4. When the locking screw 10 is tightened, the clamping ring 9 is squeezed by the ball head, increasing friction and maintaining the stability of the ball head within the ball seat 5. The other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0027] Example 5: This embodiment adds a locking screw 10 to the above embodiment. A threaded hole is provided on one side of the ball seat 5, and the locking screw 10 is internally threaded into it. The side of the locking screw 10 abuts against the lower part of the clamping ring 9 placed inside the ball seat 5. Since it is not convenient to fix the ball head of the connecting rod 4 inside the ball seat 5 by tightening the locking nut 6 during the fixing of the guide tube, a locking screw 10 is specifically provided at the lower part of the ball seat 5. This ensures that the locking nut 6 remains in its initial locked state. By pressing the clamping ring 9 with the locking screw 10, the ball head remains stable inside the ball seat 5, facilitating adjustment. Other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0028] Example 6: This embodiment, based on the above embodiment, further specifies the type of locking screw 10, which is a cylindrical head hexagonal waterproof screw. For ease of tightening the locking screw 10, it is preferred to use a cylindrical head hexagonal waterproof screw, which can be tightened using a small hex wrench. The other parts of this embodiment are the same as those in the above embodiment and will not be repeated.

[0029] Example 7: This embodiment further defines the structure of catheter 3 based on the above embodiments, such as... Figures 1-3As shown, the conduit 3 has at least two cavities of different diameters to match metal bone needles of different sizes, and the axes of the cavities are all parallel to the axis of the conduit 3. Due to the size differences of the metal bone needles, to improve its applicability, at least two cavities of different diameters are specifically provided in the conduit 3 to match metal bone needles of different sizes, for fixing metal bone needles of different sizes and better achieving the separation or compression of the fracture site. Other parts of this embodiment are the same as those in the above embodiment and will not be repeated.

[0030] Example 8: This embodiment, based on the above embodiment, further defines the connection relationship between the conduit 3 and the connecting rod 4, such as... Figure 1 , Figure 3 As shown, a cylindrical pin 11 with a vertical axis is inserted between the conduit 3 and the connecting rod 4. The cylindrical pin 11 is welded to both the conduit 3 and the connecting rod 4. To maintain axial vertical stability between the conduit 3 and the connecting rod 4, the cylindrical pin 11 is specially provided to connect the conduit 3 and the connecting rod 4 in a vertically inserted manner, and is simultaneously welded to both, maintaining the stability of their connection. Other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0031] Example 9: This embodiment, based on the above embodiment, further defines the shapes of the first support 1 and the second support 2, such as... Figure 1 , Figure 2 As shown, with the hinge point of the first support 1 and the second support 2 as the reference, the first support 1 and the second support 2 are outwardly flared arcs near the catheter 3, and the arcs of the first support 1 and the second support 2 can form an open O-ring. The first support 1 and the second support 2 serve as the force-bearing structure for the operator. To better achieve the opening or compression of the fracture ends by the end catheter 3, the structure of the first support 1 and the second support 2 has been specially optimized, making the operational force distribution more reasonable. Other parts of this embodiment are the same as those in the above embodiment and will not be repeated.

[0032] Example 10: This embodiment further defines the structure of the locking nut 6 based on the above embodiment, such as... Figure 1 , Figure 2 As shown, the surface of the locking nut 6 is also provided with friction texture. The friction texture on the locking nut 6 is to facilitate tightening or loosening the locking nut 6 from the ball seat 5 and to prevent slippage. The other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0033] Example 11: This embodiment further specifies the technical limitations based on the above embodiments, specifically including: the overall surface should be smooth and clean, free from defects such as sharp edges, burrs, dents, and cracks; all edges and corners should be rounded; rotating parts should be flexible and free from jamming; the ball head and guide tube 3 should be firmly welded; the locking screw should rotate flexibly, and when locked, the ball head and guide tube should be able to withstand a large force; it should not rotate, but when not locked, the ball head and guide tube 3 should be able to rotate freely; the bracket should be polished, and after assembly, the whole assembly should be sandblasted.

[0034] The dispersing or pressurizing device for surgical reduction of limb fractures has been manufactured according to the above technical requirements. Other parts of this embodiment are the same as those in the above embodiments and will not be repeated.

[0035] It is understood that the working principle and process of the opening or pressing device structure for surgical reduction of limb fractures according to one embodiment of the present invention, such as the locking nut 6 and the fixing nut 8, are existing technologies and are well known to those skilled in the art, and will not be described in detail here.

[0036] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A dispersing or pressurizing device for surgical reduction of limb fractures, characterized in that, include: The first support (1) and the second support (2) are hinged at the middle of the first support (1) and the second support (2); The conduit (3) has a cavity inside which a metal bone needle can be inserted; Connecting rod (4), one end of which is fixedly embedded in the end of the conduit (3), and the other end is a ball head; Ball seat (5), the lower part of which is fixedly installed at the end of the first bracket (1) or the second bracket (2), and the ball head at the end of the connecting rod (4) is placed inside the ball seat (5); The locking nut (6) is threaded to the upper part of the ball seat (5) and fixes the ball head inside the ball seat (5).

2. The dispersing or compressing device for surgical reduction of limb fractures according to claim 1, characterized in that, Also includes: A pull rod (7) has one end hinged to the inside of the first bracket (1) and the other end of the pull rod (7) passes through the end of the second bracket (2) and extends out of the second bracket (2); the end of the first bracket (1) to which the pull rod (7) is hinged is the end away from the conduit (3), and the end of the pull rod (7) that passes through the second bracket (2) is the end away from the conduit (3); Two fixing nuts (8) are threaded onto the tie rod (7). One fixing nut (8) is located between the first bracket (1) and the second bracket (2), and the other fixing nut (8) is located outside the second bracket (2).

3. A dispersing or pressurizing device for surgical reduction of limb fractures according to claim 2, characterized in that, The second bracket (2) has a sliding groove (12) inside the end away from the conduit (3). The pull rod (7) passes through the sliding groove (12) inside the second bracket (2). When the pull rod (7) is not fixed by the fixing nut (8), it can swing in the sliding groove (12).

4. A dispersing or pressurizing device for surgical reduction of limb fractures according to any one of claims 1 to 3, characterized in that, A clamping ring (9) is also installed inside the ball seat (5), and the ball head of the connecting rod (4) is fixed inside the ball seat (5) by the cooperation of the locking nut (6) and the clamping ring (9).

5. A dispersing or compressing device for surgical reduction of limb fractures according to claim 4, characterized in that, The ball seat (5) has a threaded hole on one side, and a locking screw (10) is connected to its internal thread. The side of the locking screw (10) abuts against the lower part of the clamping ring (9) placed inside the ball seat (5).

6. A dispersing or pressurizing device for surgical reduction of limb fractures according to claim 5, characterized in that, The locking screw (10) is a cylindrical head internal hexagonal waterproof screw.

7. A dispersing or pressurizing device for surgical reduction of limb fractures according to any one of claims 1 to 3, characterized in that, The catheter (3) is provided with at least two cavities of different thicknesses that match metal bone needles of different sizes, and the axis of each cavity is parallel to the axis of the catheter (3).

8. A dispersing or pressurizing device for surgical reduction of limb fractures according to any one of claims 1 to 3, characterized in that, A cylindrical pin (11) with a vertical axis is inserted between the conduit (3) and the connecting rod (4), and the cylindrical pin (11) is welded to the conduit (3) and the connecting rod (4).

9. A dispersing or pressurizing device for surgical reduction of limb fractures according to any one of claims 1 to 3, characterized in that, Based on the hinge point of the first support (1) and the second support (2), the first support (1) and the second support (2) are in an outward arc shape on the side near the conduit (3), and the arc shape of the first support (1) and the second support (2) can form an unclosed O-ring.

10. A dispersing or pressurizing device for surgical reduction of limb fractures according to any one of claims 1 to 3, characterized in that, The surface of the locking nut (6) is also provided with friction texture.

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