Bone cutting device for auxiliary external fixation of long bones of four limbs

Abstract

The utility model relates to an osteotomy device for auxiliary external fixation of long bones of four limbs, belongs to the technical field of medical instruments, and solves the problems that in the prior art, when osteotomy is assisted, the parallelism of a plane cut by a saw blade cannot be controlled, and the fracture reduction difficulty is high. The device comprises a guide rod, a first limiting assembly and a second limiting assembly, the first limiting assembly and the second limiting assembly are arranged at the two ends of the guide rod respectively, both the first limiting assembly and the second limiting assembly can slide on the guide rod, and the first limiting assembly and the second limiting assembly are used for being connected with long bones of four limbs of a patient. According to the osteotomy device, the side wall of a first limiting frame is parallel to the side wall of a second limiting frame; the osteotomy saw blade can be tightly attached to the side wall of the first limiting frame or the side wall of the second limiting frame to conduct osteotomy operation, so that it is guaranteed that the two end faces of the cut long bone section are parallel, and finally the reduction bone setting difficulty is lowered.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially, it is a kind of osteotomy device for long bone of four limbs auxiliary external fixation. BACKGROUND

[0002] Osteotomy surgery is a surgical procedure, usually refers to the part of bone is cut off or cut by surgery, to treat or improve the disease or problem related to bone.This kind of surgery is widely used in fracture healing, bone tumor, joint disease, limbs length inequality, deformity correction and other bone system disease treatment.In osteotomy surgery, surgeon needs to use the auxiliary device of external world, to accurately cut off the part of bone, the auxiliary external fixation osteotomy device on the market, generally set into the structure of "V" or "U", by placing the cutting site of patient in the middle of "V" or "U" structure, then, staff takes osteotomy saw piece, can complete osteotomy work, but the device above-mentioned when assisting osteotomy, the parallelism of saw piece cannot be controlled, leading to the difficulty of reset bone increases.

[0003] Therefore, there is an urgent need for a kind of osteotomy device for long bone of four limbs auxiliary external fixation to solve the problem that the parallelism of saw piece cannot be controlled when assisting osteotomy at present, and the difficulty of reset bone is big. UTILITY MODEL CONTENT

[0004] In view of the above analysis, the utility model embodiment aims at providing a kind of osteotomy device for long bone of four limbs auxiliary external fixation to solve the problem that the parallelism of saw piece cannot be controlled when assisting osteotomy in prior art, and the difficulty of reset bone is big.

[0005] The utility model mainly aims to realize by the following technical scheme:

[0006] A kind of osteotomy device for long bone of four limbs auxiliary external fixation, including guide rod, first limiting component and second limiting component, first limiting component and second limiting component are respectively set in the both ends of guide rod, first limiting component and second limiting component can slide on guide rod, first limiting component and second limiting component are used to be connected with the long bone of four limbs of patient;

[0007] First limiting component includes first sliding block sleeve, first limiting frame, first fixed pin and first fixed bolt;

[0008] Second limiting component includes second sliding block sleeve, second limiting frame, second fixed pin and second fixed bolt;The structure of second limiting component is same with first limiting component;

[0009] The side wall of the first limiting frame and the side wall of the second limiting frame are parallel; the osteotomy saw blade can abut against the side wall of the first limiting frame or the side wall of the second limiting frame to perform an osteotomy operation, so as to ensure that the two end faces of the cut long bone segment are parallel.

[0010] Further, the first sliding sleeve is connected with the outer wall of the first limiting frame, one end of the first fixing pin is connected with the inner wall of the first limiting frame, and the first fixing bolt is threadedly connected with the first limiting frame, and is used for pushing the long bone towards the first fixing pin and connecting the outer wall of the long bone with the first fixing pin, so as to prevent the long bone from being separated from the first fixing pin; the first fixing pin is two, and the distances from the ends of the two first fixing pins to the guide rod are the same.

[0011] Further, the first sliding sleeve and the second sliding sleeve are the same in structure and each include a hollow portion, the longitudinal section shape of the hollow portion is the same as that of the guide rod, the hollow portion of the first sliding sleeve can be connected with the guide rod, the first sliding sleeve can slide on the guide rod and cannot rotate around the guide rod.

[0012] Further, the first limiting frame and the second limiting frame are the same in structure and each is a circular arc limiting frame.

[0013] Further, the first limiting frame is provided with a first notch, and the second limiting frame is provided with a second notch.

[0014] Further, the line connecting the center of the first limiting frame with the center of the second limiting frame is parallel to the guide rod.

[0015] Further, the outer surface of the guide rod is provided with a plurality of mark grooves which are equidistantly arranged; the mark grooves are used for marking the distance between the first limiting assembly and the second limiting assembly.

[0016] Further, the first limiting assembly further includes a first locking screw, the first locking screw is threadedly connected with the first sliding sleeve, and when the first locking screw is rotated, the side wall of the guide rod can be connected with the hollow portion of the first sliding sleeve, and the first sliding sleeve cannot slide along the guide rod.

[0017] Further, the first limiting assembly further includes a first saw blade groove, the first saw blade groove is arranged on the first limiting frame, and the first saw blade groove is perpendicular to the guide rod.

[0018] Further, the second limiting assembly further includes a second locking screw and a second saw blade groove; the osteotomy saw can be inserted into the first saw blade groove or the second saw blade groove, the first saw blade groove and the second saw blade groove can prevent the osteotomy saw from deflecting, and further ensure that the two end faces of the cut long bone segment are parallel.

[0019] Compared with the prior art, the utility model can realize at least one of the following beneficial effects:

[0020] (1) The side wall of the first limiting frame and the side wall of the second limiting frame of the bone cutting device are parallel; the bone cutting saw blade can be close to the side wall of the first limiting frame or the side wall of the second limiting frame for bone cutting operation, so that the two end faces of the cut long bone segment are parallel, and finally the difficulty of bone reduction is reduced;

[0021] (2) The guide rod is a prism, the longitudinal section shape of the hollow part of the first sliding block sleeve is the same as the longitudinal section shape of the guide rod, the first sliding block sleeve can slide on the guide rod and cannot rotate around the guide rod, the first sliding block sleeve and the second sliding block sleeve ensure that the line connecting the centers of the first limiting frame and the second limiting frame is parallel to the guide rod, and the first limiting frame and the second limiting frame are not twisted;

[0022] (3) The bone cutting saw can be inserted into the first saw blade slot or the second saw blade slot of the bone cutting device, the first saw blade slot and the second saw blade slot can prevent the bone cutting saw from deflecting, further ensuring that the two end faces of the cut long bone segment are parallel, and the difficulty of bone reduction is further reduced.

[0023] In the utility model, the above-mentioned technical schemes can be combined with each other to realize more preferred combination schemes. Other features and advantages of the utility model will be described in the following content, and part of the advantages can become apparent from the description or be understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained through the content specially pointed out in the description and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings are only used for the purpose of showing specific embodiments and are not considered as limitations of the utility model, and the same reference signs represent the same parts in the whole drawings.

[0025] Figure 1 It is a side view structure schematic diagram of the utility model;

[0026] Figure 2 It is a top view structure schematic diagram of the utility model;

[0027] Figure 3 It is a whole structure schematic diagram of the utility model;

[0028] Figure 4 It is an exploded structure schematic diagram of the utility model;

[0029] Figure 5 It is a first limiting assembly split amplification structure schematic diagram.

[0030] Reference signs:

[0031] 1-guide rod; 2-first limiting assembly; 3-second limiting assembly; 21-first sliding sleeve; 22-first limiting frame; 23-first fixed pin; 24-first fixed bolt; 25-first locking screw; 26-first saw blade slot; 31-second sliding sleeve; 32-second limiting frame; 33-second fixed pin; 34-second fixed bolt; 35-second locking screw; 36-second saw blade slot. DETAILED DESCRIPTION

[0032] The preferred embodiments of the utility model will be described below in detail in conjunction with the drawings, wherein the drawings form a part of the utility model and are used together with the embodiments of the utility model to explain the principles of the utility model, and are not used to limit the scope of the utility model.

[0033] Embodiment 1

[0034] One specific embodiment of the utility model, as shown in Figure 1 and Figure 2 , discloses a bone cutting device for auxiliary external fixation of long bones of limbs (hereinafter referred to as bone cutting device), including guide rod 1, first limiting assembly 2 and second limiting assembly 3, first limiting assembly 2 and second limiting assembly 3 are arranged at both ends of guide rod 1 respectively, first limiting assembly 2 and second limiting assembly 3 can slide on guide rod 1, first limiting assembly 2 and second limiting assembly 3 are used to be connected with a long bone of limbs of a patient, and the bone cutting personnel can tightly adhere the bone cutting saw blade to first limiting assembly 2 or second limiting assembly 3, so that the end surface of the long bone segment cut by the saw blade can be guaranteed to be parallel, and the difficulty of reduction and bone setting is reduced.

[0035] Preferably, as shown in Figure 4 , in order to prevent first limiting assembly 2 or second limiting assembly 3 from deflecting around guide rod 1, guide rod 1 is a prism. Preferably, guide rod 1 is a triangular prism or a quadrangular prism, which is simple to process.

[0036] Preferably, as shown in Figure 2 and Figure 3 , first limiting assembly 2 includes first sliding sleeve 21 and first limiting frame 22, and the outer wall of first sliding sleeve 21 is connected with first limiting frame 22.

[0037] Preferably, first sliding sleeve 21 includes a hollow portion, the longitudinal section shape of the hollow portion is the same as the longitudinal section shape of guide rod 1, the hollow portion of first sliding sleeve 21 can be connected with guide rod 1, first sliding sleeve 21 can slide on guide rod 1 and cannot rotate around guide rod 1.

[0038] Preferably, the first limiting frame 22 is an arc-shaped limiting frame, and further, the first limiting frame 22 is a circular arc-shaped limiting frame. The first limiting frame 22 is used for fixing the long bone. The first limiting frame 22 is provided with a first notch, and the first limiting frame 22 can clamp the long bone through the first notch.

[0039] Preferably, the second limiting assembly 3 has the same structure as the first limiting assembly 2, and the second limiting assembly 3 comprises a second sliding block sleeve 31 and a second limiting frame 32. The second sliding block sleeve 31 has the same structure as the first sliding block sleeve 21, and the first sliding block sleeve 21 and the second sliding block sleeve 31 ensure that the line connecting the center of the first limiting frame 22 and the center of the second limiting frame 32 is parallel to the guide rod 1, and the first limiting frame 22 and the second limiting frame 32 are not twisted.

[0040] The second limiting frame 32 is provided with a second notch. The side wall of the first limiting frame 22 and the side wall of the second limiting frame 32 are parallel. The osteotomy saw blade can be close to the side wall of the first limiting frame 22 or the side wall of the second limiting frame 32 for osteotomy operation, so as to ensure that the two end faces of the cut long bone segment are parallel, and finally reduce the difficulty of bone reduction.

[0041] Preferably, the first limiting assembly 2 further comprises a first fixed pin 23, one end of the first fixed pin 23 is connected with the inner wall of the first limiting frame 22, and the other end of the first fixed pin 23 is a first positioning end. The first fixed pin 23 is two, and the extension lines of the two first fixed pins 23 intersect at the center of the first limiting frame 22, and the distances from the first positioning ends of the two first fixed pins 23 to the guide rod 1 are the same. The second limiting assembly 3 further comprises a second fixed pin 33, the structure of the second fixed pin 33 is the same as that of the first fixed pin 23, and the end of the second fixed pin 33 not connected with the second limiting frame 32 is a second positioning end. The first positioning end is used for fixing one end of the long bone, and the second positioning end is used for fixing the other end of the long bone, and the first positioning end and the second positioning end can be connected with the outer walls of the two ends of the long bone respectively. The first fixed pin 23 and the second fixed pin 33 are used to ensure that the distances from the two ends of the cut long bone segment to the guide rod 1 are equal.

[0042] Preferably, the first limiting assembly 2 further comprises a first fixed bolt 24, the first fixed bolt 24 is arranged at two ends of the first notch and is in threaded connection with the first limiting frame 22, the first fixed bolt 24 is used to push the long bone towards the first fixed pin 23, and the outer wall of the long bone is connected with the first positioning end, so as to prevent the long bone from being separated from the first fixed pin 23. The second limiting assembly 3 further comprises a second fixed bolt 34, the structure of the second fixed bolt 34 is the same as that of the first fixed bolt 24, and the second fixed bolt 34 is used to push the long bone towards the second fixed pin 33, and the outer wall of the long bone is connected with the second positioning end, so as to prevent the long bone from being separated from the second fixed pin 33.

[0043] Preferably, as Figure 5As shown, the first limiting assembly 2 further comprises a first locking screw 25, which is threadedly connected with the first sliding sleeve 21. When the first locking screw 25 is rotated, the end of the first locking screw 25 can be connected with the side wall of the guide rod 1. When the first locking screw 25 is further rotated, the side wall of the guide rod 1 can be connected with the hollow portion of the first sliding sleeve 21, and the first sliding sleeve 21 cannot slide along the guide rod 1, so as to fix the positional relationship between the first limiting assembly 2 and the guide rod 1. The second limiting assembly 3 further comprises a second locking screw 35, which is threadedly connected with the second sliding sleeve 31. When the second locking screw 35 is rotated, the end of the second locking screw 35 can be connected with the side wall of the guide rod 1. When the second locking screw 35 is further rotated, the side wall of the guide rod 1 can be connected with the hollow portion of the second sliding sleeve 31, and the second sliding sleeve 31 cannot slide along the guide rod 1, so as to fix the positional relationship between the second limiting assembly 3 and the guide rod 1, and fix the distance between the first limiting assembly 2 and the second limiting assembly 3, thereby fixing the length of the cut bone segment.

[0044] Preferably, the outer surface of the guide rod 1 is provided with marking grooves, and a plurality of marking grooves are equidistantly arranged. The marking grooves are used for marking the distance between the first limiting assembly 2 and the second limiting assembly 3, so as to facilitate the determination of the length of the cut bone segment.

[0045] During the operation of the bone cutting surgery, the bone cutting personnel determines the distance between the first limiting assembly 2 and the second limiting assembly 3 according to the requirements of the surgery, and fixes the distance by using the first locking screw 25 and the second locking screw 35 respectively. The first gap and the second gap are aligned with the long bone, and the first limiting frame 22 and the second limiting frame 32 are respectively clamped on the two ends of the long bone. The first fixing bolt 24 and the second fixing bolt 34 are respectively tightened in the direction of the guide rod 1, so as to completely fix the long bone and the bone cutting device of the embodiment. The bone cutting saw blade is tightly attached to the side wall of the first limiting frame 22 and the side wall of the second limiting frame 32 for the bone cutting operation. The two end faces of the cut long bone segment are parallel, and the difficulty of bone reduction is low.

[0046] Compared with the prior art, the side wall of the first limiting frame 22 and the side wall of the second limiting frame 32 of the osteotomy device of the embodiment are parallel. The osteotomy saw blade can be close to the side wall of the first limiting frame 22 or the side wall of the second limiting frame 32 for the osteotomy operation, so as to ensure that the two end faces of the cut long bone segment are parallel, and finally reduce the difficulty of reduction and bone setting; the guide rod 1 is a prism, the hollow part of the first sliding block sleeve 21 has the same longitudinal section shape as the longitudinal section shape of the guide rod 1, the first sliding block sleeve 21 can slide on the guide rod 1 and cannot rotate around the guide rod 1, the first sliding block sleeve 21 and the second sliding block sleeve 31 ensure that the line connecting the centers of the first limiting frame 22 and the second limiting frame 32 is parallel to the guide rod 1, and the first limiting frame 22 and the second limiting frame 32 are not twisted; the first positioning end is used for fixing one end of the long bone, and the second positioning end is used for fixing the other end of the long bone, and the first positioning end and the second positioning end can be connected with the outer walls of the two ends of the long bone, respectively. The first fixing pin 23 and the second fixing pin 33 are used for ensuring that the distances from the two ends of the cut long bone segment to the guide rod 1 are equal.

[0047] Embodiment 2

[0048] Another specific embodiment of the utility model, as Figure 3 shown, on the basis of embodiment 1, the first limiting assembly 2 and the second limiting assembly 3 are improved, the saw blade slot is increased, so that the osteotomy saw can be connected with the saw blade slot when osteotomy, the saw blade slot limits the deflection of the osteotomy saw, further ensures that the two end faces of the cut long bone segment are parallel, and the difficulty of reduction and bone setting is further reduced.

[0049] Preferably, the first limiting assembly 2 further comprises a first saw blade slot 26, and the first saw blade slot 26 is arranged on the first limiting frame 22 and is perpendicular to the guide rod 1. The second limiting assembly 3 further comprises a second saw blade slot 36, and the structure of the second saw blade slot 36 is the same as that of the first saw blade slot 26.

[0050] Compared with embodiment 1, the osteotomy saw can be inserted into the first saw blade slot 26 or the second saw blade slot 36, the first saw blade slot 26 and the second saw blade slot 36 can prevent the osteotomy saw from deflecting, further ensure that the two end faces of the cut long bone segment are parallel, and the difficulty of reduction and bone setting is further reduced.

[0051] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. An osteotomy device for assisting external fixation of long bones of the extremities, characterized in that, The application relates to a guiding rod (1), a first limiting assembly (2) and a second limiting assembly (3), the first limiting assembly (2) and the second limiting assembly (3) are arranged at two ends of the guiding rod (1) respectively, the first limiting assembly (2) and the second limiting assembly (3) can slide on the guiding rod (1), and the first limiting assembly (2) and the second limiting assembly (3) are used for connecting with long bones of limbs of a patient. The first limiting assembly (2) comprises a first sliding block sleeve (21), a first limiting frame (22), a first fixing pin (23) and a first fixing bolt (24). The second limiting assembly (3) comprises a second sliding block sleeve (31), a second limiting frame (32), a second fixing pin (33) and a second fixing bolt (34), and the structure of the second limiting assembly (3) is the same as that of the first limiting assembly (2). The side wall of the first limiting frame (22) is parallel to the side wall of the second limiting frame (32), and an osteotomy saw blade can be closely attached to the side wall of the first limiting frame (22) or the side wall of the second limiting frame (32) to perform an osteotomy operation, so that the two end faces of a long bone segment to be cut are parallel.

2. The osteotomy device for assisting the external fixation of long bones of extremities according to claim 1, characterized in that, The first sliding block sleeve (21) is connected with the outer wall of the first limiting frame (22), one end of the first fixing pin (23) is connected with the inner wall of the first limiting frame (22), the first fixing bolt (24) is threadedly connected with the first limiting frame (22), the first fixing bolt (24) is used for pushing the long bone towards the first fixing pin (23) and connecting the outer wall of the long bone with the first fixing pin (23), so that the long bone is prevented from being separated from the first fixing pin (23), and the two first fixing pins (23) are the same in distance from the guiding rod (1).

3. The osteotomy device for assisting the external fixation of long bones of extremities according to claim 2, characterized in that, The first sliding block sleeve (21) and the second sliding block sleeve (31) are the same in structure and comprise hollow portions, the longitudinal section shape of the hollow portions is the same as that of the guiding rod (1), the hollow portion of the first sliding block sleeve (21) can be connected with the guiding rod (1), the first sliding block sleeve (21) can slide on the guiding rod (1) and cannot rotate around the guiding rod (1).

4. The osteotomy device for assisting the external fixation of long bones of extremities according to claim 1, characterized in that, The first limiting frame (22) and the second limiting frame (32) are the same in structure and are circular arc limiting frames.

5. The osteotomy device for assisting the external fixation of long bones of extremities according to claim 4, characterized in that, A first notch is formed in the first limiting frame (22), and a second notch is formed in the second limiting frame (32).

6. The osteotomy device for assisting the external fixation of long bones of extremities according to claim 5, characterized in that, The connecting line of the centers of the first limiting frame (22) and the second limiting frame (32) is parallel to the guiding rod (1).

7. The osteotomy device for assisting the external fixation of long bones of extremities according to claim 1, characterized in that, The outer surface of the guiding rod (1) is provided with marking grooves, and a plurality of marking grooves are equidistantly arranged; the marking grooves are used for marking the distance between the first limiting assembly (2) and the second limiting assembly (3).

8. The osteotomy device for assisting the external fixation of long bones of extremities according to claim 1, characterized in that, The first limiting assembly (2) further comprises a first locking screw (25), the first locking screw (25) is threadedly connected with the first sliding block sleeve (21), the side wall of the guiding rod (1) can be connected with the hollow portion of the first sliding block sleeve (21) by rotating the first locking screw (25), and the first sliding block sleeve (21) cannot slide along the guiding rod (1).

9. The osteotomy device for assisting the external fixation of long bones of extremities according to claim 1, characterized in that, The first limiting assembly (2) further comprises a first saw blade slot (26) arranged on the first limiting frame (22), and the first saw blade slot (26) is perpendicular to the guide rod (1).

10. The osteotomy device for assisting the external fixation of long bones of extremities according to claim 9, characterized in that, The second limiting assembly (3) further comprises a second locking screw (35) and a second saw blade slot (36); the osteotomy saw can be inserted into the first saw blade slot (26) or the second saw blade slot (36), the first saw blade slot (26) and the second saw blade slot (36) can prevent the osteotomy saw from deflecting, and further ensure that the two end faces of the cut long bone segment are parallel.

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