A multidimensional outward fixing device

Abstract

This application relates to a multi-dimensional outward fixation device, including a fixing block, a bone pin, and a clamping member. The fixing block has pin holes, rod holes, and locking holes, and the bone pin is installed in the pin holes. A connecting rod is installed in the rod hole and cross-abuts against the bone pin. The clamping member is installed in the locking hole and is configured to lock the connecting rod and the bone pin by clamping the connecting rod. The pin holes penetrate the fixing block and are perpendicular to the xz plane; the rod holes penetrate the fixing block and are perpendicular to the xy plane; the locking hole is perpendicular to the yz plane and communicates with the rod holes; the pin holes and rod holes are cross-connected. This application has a simple structure, is easy to operate, and has good stability.

Description

Technical Field

[0001] This application belongs to the field of orthopedic medical device technology, specifically relating to a multidimensional outward fixation device. Background Technology

[0002] Currently, external fixation products used clinically for traumatic limb fractures and pelvic fractures typically employ a combination of pin-rod clamps 100, connecting rods 200, and bone pins 300. (See [link to relevant documentation]). Figures 1 to 2 However, existing external fixation products for fractures have the following problems:

[0003] Question 1: One type of product, the pin-rod clamp 100, can only clamp one bone pin 300 at a time. Because the angle of the clamping channel is fixed, the angle of the bone pin 300 is also limited, making multi-angle adjustment impossible. Another type of product, the pin-rod clamp 100, can only clamp a maximum of two bone pins 300 at a time, but these two bone pins 300 are parallel and implanted into the bone at the same angle, also making it impossible to adjust the bone pin implantation angle. However, for some complex fracture fixation cases, multiple bone pins are required, and different bone pins need to be implanted at different angles. Therefore, existing external fixation products are insufficient to meet the needs of complex fracture fixation.

[0004] Question 2: The existing needle bar clamp 100 has a complex structure, is large and heavy, and has many parts, which makes it inconvenient to operate during surgery.

[0005] Question 3: The connecting rods of the existing products are all straight round rods with smooth outer circumference surfaces, which makes it easy for the connecting rods to loosen after surgery. Summary of the Invention

[0006] In view of the above analysis, the present invention aims to provide a multi-dimensional outward fixing device to solve one or more of the above-mentioned problems existing in the prior art.

[0007] The objective of this invention is achieved as follows:

[0008] A multidimensional outward fixing device, comprising:

[0009] A fixing block is provided with a pinhole channel, a rod channel, and a locking channel. The pinhole channel passes through the fixing block and is perpendicular to the xz plane. The rod channel passes through the fixing block and is perpendicular to the xy plane. The locking channel is perpendicular to the yz plane and communicates with the rod channel. The pinhole channel and the rod channel are arranged to communicate with each other.

[0010] A bone needle is installed in the needle hole channel; a connecting rod is installed in the rod hole channel and crosses and abuts against the bone needle.

[0011] A clamping member, installed in the locking channel, is configured to clamp and fix the connecting rod to the bone needle by clamping the connecting rod.

[0012] Furthermore, the connecting rod is located between the bone needle and the clamping member, and the connecting rod is capable of moving along the x-axis direction within the rod channel and clamping the bone needle when the clamping member is tightened.

[0013] Furthermore, the channel wall of the needle channel is provided with at least one groove, which is configured to control the angle of the bone needle within the needle channel.

[0014] Furthermore, the groove is a V-shaped groove, the groove wall surface of the V-shaped groove contacts the bone needle, and the angle between the symmetry plane of the V-shaped groove and the xy plane is 0°-60°;

[0015] or,

[0016] The groove is a cross-arranged grid-like groove, and the grid-like groove has friction with the surface of the bone needle. The angle of the bone needle in the needle hole is controlled by the friction.

[0017] Furthermore, the cross-section of the pinhole channel is teardrop-shaped.

[0018] Furthermore, the clamping member includes a threaded section and a clamping part. The first end of the threaded section is provided with a screwing operation groove. The clamping part is rotatably connected to the second end of the threaded section. The end of the clamping part is a saddle-shaped structure, and the concave part of the saddle-shaped structure abuts against the connecting rod.

[0019] Furthermore, the end of the tightening part is provided with a concave arc surface, which is adapted to the outer circumferential surface of the connecting rod and can restrict the rotation of the connecting rod when the threaded section is screwed.

[0020] Furthermore, the threaded section is provided with a negative angle thread.

[0021] Furthermore, the connecting rod has an anti-slip ring groove on its circumferential wall.

[0022] Furthermore, one of the connecting rods is used in conjunction with at least two of the fixing clips; a matching fixing clip is selected according to the implantation angle of the bone needle, and each fixing clip is fitted with at least one bone needle.

[0023] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0024] a) The multidimensional outward fixation device provided by this invention revolutionizes the pin-rod clamp of current fixation products by replacing the pin-rod clamp with a fixation block, thus overcoming many defects of current fixation products. For example, the pin holes of the fixation block of this application have multiple configurations, which not only allows more than 3 bone pins to be installed on one fixation block at the same time, but also allows the angles of multiple bone pins on a uniform fixation block to be different by selecting pin holes with different structural shapes. The angles of multiple bone pins on different fixation blocks with the connecting rod can be 30°, 45°, 60°, 90°, etc., thereby adapting to complex fracture fixation situations that require the implantation of multiple bone pins at different angles.

[0025] b) The multidimensional outward fixation device provided by the present invention has only two components, namely a fixing clamp and a clamping member, in addition to the bone needle and connecting rod. The number of components is reduced, the weight is lighter, and the volume can be made smaller. The size of the fixing clamp is about 5 times smaller than that of the needle-bar clamp of the existing products, and the installation and operation are more convenient and simple.

[0026] c) The multidimensional outward fixation device provided by the present invention uses a threaded section and a tightening part that are rotatably connected, and the clamping method between the tightening part and the connecting rod is a saddle type, which has good locking force and more secure connection and fixation, and can effectively prevent loosening after surgery.

[0027] d) The multidimensional outward fixation device provided by this invention has a simple structure, is relatively easy to operate, and has good stability; the incision is small during implantation, reducing bleeding; it will not cause excessive damage to the soft tissues at the fracture site, and is especially suitable for severe open fractures with extensive soft tissue damage; it allows for early joint mobilization, gradual limb lengthening, and can be adjusted at any time according to the fracture reduction situation. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings.

[0029] Figure 1 This is a schematic diagram of the structure of a pin clamp for an external fixation product in the prior art;

[0030] Figure 2 This is a schematic diagram illustrating the implementation state of an external fixation product in the prior art.

[0031] Figure 3 A schematic diagram of the fixing clamp block of the multidimensional outward fixing device provided by the present invention;

[0032] Figure 4 A disassembly diagram of the fixing clamp and the clamping member of the multidimensional outward fixing device provided by the present invention;

[0033] Figure 5 A schematic diagram of the structure of the clamping member provided by the present invention;

[0034] Figure 6 A partial cross-sectional structural diagram of the multidimensional outward fixing device provided by the present invention;

[0035] Figure 7 A schematic diagram of the fixing clamp block with V-shaped groove bone needle hole provided by the present invention;

[0036] Figure 8 A schematic diagram of the structure of the fixing clamp block with a grid-like grooved bone needle channel provided by the present invention;

[0037] Figure 9 A schematic diagram of the structure of the fixing block with teardrop-shaped channels provided by the present invention;

[0038] Figure 10 A schematic diagram of the first angle structure of the multidimensional outward fixing device provided by the present invention;

[0039] Figure 11 A schematic diagram of the second angle structure of the multidimensional outward fixing device provided by the present invention;

[0040] Figure 12 This provides a schematic diagram of the implementation state of the multidimensional outward fixing device of the present invention.

[0041] Figure label:

[0042] 100. Needle bar clamp; 200. Connecting rod; 300. Bone needle;

[0043] 400, Fixing clamp; 401, Pinhole channel; 4011, V-groove; 4012, Mesh groove; 4013, Teardrop-shaped channel; 402, Rod channel; 403, Locking channel; 500, Connecting rod; 501, Anti-slip ring groove; 600, Tightening component; 601, Threaded section; 602, Tightening part; 6021, Concave arc surface. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be noted that, unless otherwise specified, the implementation methods and features in the implementation methods in this disclosure can be combined, separated, interchanged, and / or rearranged. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] In the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0046] When a component is referred to as being "on" or "above" another component, "connected to," or "joined to" another component, the component may be directly on, directly connected to, or directly joined to the other component, or there may be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to," or "directly joined to" another component, there are no intermediate components. Therefore, the term "connection" can refer to a physical connection, an electrical connection, etc., and may or may not have intermediate components.

[0047] For descriptive purposes, this disclosure may use spatial relative terms such as “top,” “bottom,” “below,” “under,” “under,” “below,” “above,” “above,” “higher,” etc., which are relative to components, to describe the relationship between one component and another (other) component as shown in the accompanying drawings.

[0048] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0049] Example 1

[0050] A specific embodiment of the present invention, such as Figures 2 to 12 As shown, a multidimensional outward fixation device is disclosed, including a fixation clamp 400, a bone pin 300, a connecting rod 500, and a tightening member 600. It can be combined in clinical practice for traumatic limb fractures and pelvic fractures. The fixation clamp 400 is a rectangular parallelepiped structure with six sides and twelve blunted edges. The fixation clamp 400 has pin holes 401, rod holes 402, and locking holes 403. The bone pin 300 is installed in the pin holes 401. The connecting rod 500 is installed in the rod holes 402 and cross-abuts against the bone pin 300. The tightening member 600 is installed in the locking holes 403 and is configured to lock the connecting rod 500 and the bone pin 300 by tightening it.

[0051] To facilitate the description of the relative positions of each channel on the fixed clamp 400, a three-dimensional spatial coordinate system composed of the x-axis, y-axis, and z-axis is established to define the relationship between each surface and the xy-plane, yz-plane, and xz-plane. Specifically, as follows... Figure 3 As shown, the pinhole channel 401 penetrates the fixing clamp 400 and is perpendicular to the xz plane; the rod channel 402 penetrates the fixing clamp 400 and is perpendicular to the xy plane; the locking channel 403 is perpendicular to the yz plane and communicates with the rod channel 402; the pinhole channel 401 and the rod channel 402 are intersecting and communicating; the locking channel 403 is opened on one side of the fixing clamp 400 and does not penetrate the fixing clamp 400.

[0052] In this embodiment, the projection of the rod channel 402 onto the xy plane is an elongated hole, with its length along the x-axis. Furthermore, the size of the needle channel 401 is larger than the diameter of the bone needle 300. This structural design allows the connecting rod 500 to move a certain distance within the rod channel 402, facilitating the rapid installation of the bone needle and connecting rod. The connecting rod 500 is located between the bone needle 300 and the clamping member 600. When the clamping member 600 is tightened, the connecting rod 500 can move along the x-axis within the rod channel 402 until it clamps the bone needle 300, thereby achieving the fixed installation of the bone needle 300, the connecting rod 500, and the fixing clamp 400.

[0053] In one alternative embodiment, the bone needle 300, the fixation clamp 400, the connecting rod 500, and the clamping member 600 are made of high-strength, low-modulus biomedical titanium alloy materials, such as Ti-15Mo and titanium alloy materials, and the patient can undergo MRI.

[0054] In this embodiment, the angle of the bone needle 300 in the needle channel 401 can be varied, and the shape and structure of the needle channel 401 on the fixing block 400 include the following structures:

[0055] The first type of needle channel 401 achieves angle control of the bone needle 300 after installation by providing a groove in the channel wall of the needle channel 401. Specifically, the channel wall of the needle channel 401 is provided with at least one groove, which is configured to control the angle of the bone needle 300 within the needle channel 401.

[0056] In the first type of pinhole channel 401, such as Figure 7As shown, the groove can be a V-shaped groove 4011, and the groove wall of the V-shaped groove 4011 contacts the bone needle 300. The angle α between the symmetry plane of the V-shaped groove 4011 and the xy plane is 0°-60°, and can be set to a fixed angle, such as 0°, 30°, 45°, 60°, etc. For example, when the angle between the symmetry plane of the V-shaped groove 4011 and the xy plane is 0°, the bone needle 300 is perpendicular to the connecting rod 500; that is, the angle between the bone needle 300 and the connecting rod 500 can be 90°, 60°, 45°, 30°, etc. Of course, the same fixing block 400 can be provided with only one type of V-groove 4011 with an included angle α, or it can be provided with multiple types of V-groove 4011 with included angle α. This allows the angles of the multiple bone pins 300 to be different when at least two bone pins 300 are installed on the same fixing block 400, thus adapting to complex fracture fixation situations that require the implantation of multiple bone pins with different angles. For example, at least one V-groove 4011 has an angle α of 0° with the xy plane and at least one V-groove 4011 has an angle α of 30° with the xy plane. When bone pins 300 are inserted into these two types of V-groove 4011 with included angles, the angles of the two bone pins 300 and the connecting rod 500 are different, differing by 30°.

[0057] In the first type of pinhole channel 401, such as Figure 8 As shown, the groove can also be a cross-arranged grid-like groove 4012. The grid-like groove 4012 is a shallow groove. The grid-like groove 4012 has friction with the surface of the bone needle 300. The friction controls the fixed angle of the bone needle 300 in the needle channel 401. With this structure of the needle channel 401, the bone needle 300 can be finely adjusted in angle within the needle channel 401. For example, the angle between the bone needle 300 and the connecting rod 500 can be adjusted arbitrarily between 0° and ±60°. The maximum adjustment angle is affected by the size parameters of the needle channel 401, that is, the shape and size of the needle channel 401 affect the swing angle range of the bone needle 300 within the needle channel 401.

[0058] The second type of pinhole channel 401, such as Figure 9 As shown, the cross-section of the needle channel 401 is teardrop-shaped. That is, the needle channel 401 is a teardrop-shaped channel 4013, and multiple teardrop-shaped channels 4013 are arranged in parallel. The cross-section at the tip of the teardrop-shaped channel 4013 is also V-shaped, that is, the angle between the symmetry plane of the teardrop-shaped channel 4013 and the xy plane is 0°. When the bone needle 300 is fixedly installed into the teardrop-shaped channel 4013, the bone needle 300 is perpendicular to the connecting rod 500.

[0059] It is understandable that pinhole channels 401 with various structures can be provided on the same fixed clamping block 400. For example, the pinhole channels 401 on the same fixed clamping block 400 can be one or more of the following combinations: V-groove 4011, mesh groove 4012, and teardrop-shaped channel 4013.

[0060] In one optional embodiment, the clamping member 600 includes a threaded section 601 and a clamping part 602. The first end of the threaded section 601 has a screwing operation groove, into which a screwing tool is inserted to achieve rotational installation of the threaded section 601. The clamping part 602 is rotatably connected to the second end of the threaded section 601. The end of the clamping part 602 has a saddle-shaped structure, with the recess of the saddle-shaped structure abutting against the connecting rod 500. The clamping method between the clamping part 602 and the connecting rod is a saddle-type, resulting in a more secure connection and effectively preventing postoperative loosening. Specifically, the clamping part 602 is rotatably connected to the second end of the threaded section 601. The end of the clamping part 602 has an inwardly concave arc surface 6021, which is adapted to the outer circumferential surface of the connecting rod 500 and can restrict the rotation of the connecting rod 500 when the threaded section 601 is screwed, thereby preventing the angle of the connecting rod 500 from deflecting. When the clamping member 600 is inserted into the locking channel 403, as the threaded section 601 is turned, the clamping part 602 gradually moves toward the connecting rod 500. When the recess of the saddle-shaped structure of the clamping part 602 abuts against the connecting rod 500, the connecting rod 500 will prevent the clamping part 602 from rotating further, while the threaded section 601 can still continue to rotate and continue to apply clamping force to the clamping part 602 until the connecting rod 500 is clamped, thus completing the locking installation of the clamping member 600. During this process, the position of the connecting rod 500 will not shift due to the continuous turning of the clamping member 600.

[0061] In one alternative embodiment, the threaded segment 601 is provided with a negative angle thread. After the threaded segment 601 is inserted into the locking channel 403 and locked, the negative angle thread can prevent the threaded segment 601 from coming out of the locking channel 403.

[0062] In one alternative embodiment, the connecting rod 500 has an anti-slip groove 501 on its circumferential wall, which can improve the connection strength between the connecting rod 500 and the fixing block 400 and prevent loosening between the connecting rod 500 and the fixing block 400 after surgery. In this embodiment, the anti-slip groove 501 on the circumferential surface of the connecting rod 500 is not a thread. If it were a thread, stress concentration would occur at the thread teeth, making the rod prone to breakage.

[0063] Furthermore, to prevent stress concentration and subsequent postoperative rod breakage, the anti-slip groove 501 is smoothed. Compared to a smooth round rod, this application, by providing a smooth anti-slip groove 501 on the circumferential surface of the connecting rod 500, enables the connecting rod to be clamped more tightly to the fixation block and bone pin, and is less prone to breakage.

[0064] In this embodiment of the multidimensional outward fixation device, one connecting rod 500 is used in conjunction with at least two fixation clips 400; the fixation clips 400 are selected according to the implantation angle of the bone pins 300, and each fixation clip 400 is equipped with at least one bone pin 300. See [link to documentation]. Figures 10 to 11 .

[0065] During the procedure, depending on the patient's fracture condition, the surgeon can select multiple fixation clips 400. Each fixation clip 400 can hold 1-2 or more bone pins 300. The number of bone pins is related to the size and shape of the pin channel 401, and it is advisable to ensure that the bone pins do not interfere with each other. Moreover, since the angle of the bone pins on the same fixation clip 400 can be selected in various ways, a fixation clip 400 with a suitable structure for the pin channel 401 can be selected according to the specific fracture condition. The differentiated angle settings between the multiple bone pins 300 and the connecting rod 500 can better adapt to complex fracture fixation situations that require the implantation of multiple bone pins at different angles.

[0066] Compared with the prior art, the multidimensional outward fixing device provided in this embodiment can achieve the following beneficial effects:

[0067] 1. By fundamentally changing the pin-rod clamp of current fixation products and replacing it with a fixation block, this invention overcomes many of the shortcomings of current fixation products. For example, the pin channels of the fixation block in this application have multiple configurations, allowing more than three bone pins to be installed simultaneously on a single fixation block. Furthermore, by selecting pin channels with different structural shapes, the angles of multiple bone pins on a uniform fixation block can be different. The angles between multiple bone pins and the connecting rod on different fixation blocks can be 30°, 45°, 60°, 90°, etc., thus adapting to complex fracture fixation situations requiring the implantation of multiple bone pins at different angles.

[0068] 2. Apart from the bone needle and connecting rod, this application only has two parts: a fixing clamp and a clamping component. With fewer parts, the weight is lighter and the size can be made smaller. The size of the fixing clamp is about 5 times smaller than that of the needle-bar clamp of the existing product, and the installation and operation are also more convenient and simple.

[0069] 3. The clamping component adopts a rotating threaded section and a clamping part, and the clamping method between the clamping part 602 and the connecting rod adopts a saddle type, which has good locking force and more secure connection, and can effectively prevent loosening after surgery.

[0070] 4. The structure is simple, the operation is relatively simple, and the stability is good; the incision is small during implantation, reducing the amount of bleeding; it will not cause excessive damage to the soft tissues at the fracture site, and is especially suitable for severe open fractures with extensive soft tissue damage; it allows for early joint mobilization, gradual limb lengthening, and adjustments can be made at any time according to the fracture reduction.

[0071] 5. Made of Ti-15Mo and titanium alloy materials, it allows patients to undergo MRI scans.

[0072] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above description is only a specific embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A multidimensional outwardly facing fixture, characterized by, The utility model relates to a kind of bone fixation systems, including: Fixed clamp block, needle hole, rod hole, locking hole are equipped on the fixed clamp block, wherein the needle hole is vertically through the fixed clamp block and is perpendicular to xz plane, the rod hole is vertically through the fixed clamp block and is perpendicular to xy plane, the locking hole is perpendicular to yz plane and is communicated with the rod hole, the needle hole and rod hole are cross-communicated arrangement; Bone needle, installed in the needle hole; Connecting rod, installed in the rod hole, and cross-abut with the bone needle; Jacking piece, installed in the locking hole, is configured to realize the locking and fixing of the connecting rod and the bone needle by jacking the connecting rod.

2. The multi-dimensional male fastener of claim 1, wherein, The connecting rod is located between the bone needle and the jacking piece, and the connecting rod can move along the x-axis direction in the rod hole and jack the bone needle when the jacking piece is jacked.

3. The multi-dimensional, outwardly-biased securement device of Claim 1, wherein, The hole wall of the needle hole is provided with at least one groove, and the groove is configured to control the angle of the bone needle in the needle hole.

4. The multi-dimensional male fixation device of claim 3, wherein, The groove is V-shaped groove, the groove wall surface of the V-shaped groove is in contact with the bone needle, and the included angle between the symmetry plane of the V-shaped groove and the xy plane is 0-60 degrees. Or, The groove is cross-arranged grid-shaped groove, and the grid-shaped groove has friction with the surface of the bone needle, to control the angle of the bone needle in the needle hole by friction.

5. The multi-dimensional, male, fixation device of claim 1, wherein, The cross section of the needle hole is drop-shaped.

6. The multi-dimensional, male, fixation device of claim 1, wherein, The jacking piece includes threaded section and jacking part, the first end of the threaded section is provided with screwing operation groove, the jacking part is rotationally connected to the second end of the threaded section, the end of the jacking part is saddle-shaped structure, and the concave part of the saddle-shaped structure is in abutment with the connecting rod.

7. The multi-dimensional, male, fixation device of claim 6, wherein, The concave part of the saddle-shaped structure is provided with inner concave circular surface, the inner concave circular surface is matched with the outer peripheral surface of the connecting rod, and the connecting rod can be limited to rotate when the threaded section is screwed.

8. The multi-dimensional, male, fixation device of claim 6, wherein, The threaded section is provided with negative angle thread.

9. The multi-dimensional, male, fixation device of claim 1, wherein, The circumference wall of the connecting rod is provided with anti-skid ring groove.

10. The polydimensional male fixation device of claim 4 or 5, wherein, One connecting rod is matched with at least two fixed clamp blocks; According to the implantation angle of the bone needle, the matching fixed clamp block is selected, and each fixed clamp block is installed with at least one bone needle.

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