阅读说明：本技术 一种外固定架 (External fixing frame ) 是由 王林华 卢敏 朱付平 龚志贤 李武平 刘鑫 邝高艳 严可 于 2021-10-15 设计创作，主要内容包括：本发明公开了一种外固定架,包括牵拉板,及与所述牵拉板固接的牵拉针,还包括与所述牵拉针固接、并带动所述牵拉针沿轴向移动的螺纹传动机构。使用时,在患者胫骨结节下剥开骨膜截取一小块骨块,并保护好胫骨表面的骨膜,首先,将牵拉板设于被截取的胫骨骨块和位于胫骨表面的骨膜之间,然后,将牵拉针与牵拉板和骨块连接,最后,通过螺纹传动机构带动牵拉针沿其轴向移动。这样一来,通过带动牵拉针和牵拉板移动,以实现在牵拉骨块的同时牵拉骨膜,从而可以促进小腿部位血管网新生,建立新生血管,增加小腿部位营养血液,进而促进糖尿病足创面自然愈合。(The invention discloses an external fixing frame which comprises a traction plate, a traction needle fixedly connected with the traction plate and a thread transmission mechanism fixedly connected with the traction needle and driving the traction needle to move along the axial direction. When the traction device is used, a periosteum is stripped under a tibial tubercle of a patient to intercept a small bone block, the periosteum on the surface of the tibia is protected, firstly, the traction plate is arranged between the intercepted tibial bone block and the periosteum on the surface of the tibia, then, the traction needle is connected with the traction plate and the bone block, and finally, the traction needle is driven to move along the axial direction of the traction needle through the threaded transmission mechanism. Therefore, the traction needle and the traction plate are driven to move, so that the periosteum is pulled while the bone block is pulled, the blood vessel network of the lower leg part can be promoted to regenerate, the new blood vessel is established, the nutrient blood of the lower leg part is increased, and the natural healing of the wound surface of the diabetic foot is promoted.)

1. An external fixing frame is characterized by comprising a traction plate (1), a traction needle (2) fixedly connected with the traction plate (1), and a thread transmission mechanism fixedly connected with the traction needle (2) and driving the traction needle (2) to move along the axial direction.

2. The external fixator according to claim 1, further comprising a first fixing block (3) fixedly connected with the traction needle (2); the screw transmission mechanism comprises a second fixed block (4), a screw rod (5) and an adjusting nut (6), the screw rod (5) penetrates through the second fixed block (4) and then is fixedly connected with the first fixed block (3), and the adjusting nut (6) is arranged in the second fixed block (4) and is in threaded connection with the screw rod (5).

3. External fixator according to claim 2, characterized in that the cross section of the screw (5) is fan-shaped, and the second fixing block (4) is provided with a limiting hole which cooperates with the screw (5) to limit the rotation of the screw (5).

4. External fixator according to claim 2, characterized in that the second fixing block (4) is provided with a receiving groove (41) for receiving the adjusting nut (6) on the side close to the pulling needle (2), and the adjusting nut (6) protrudes out of the receiving groove (41).

5. The external fixator according to claim 2, wherein the screw (5) is in threaded connection with a positioning nut (7), and the screw (5) is fixed with the second fixing block (4) by the positioning nut (7).

6. The external fixator according to claim 2, further comprising two first fixing rods (8) fixed to two ends of the second fixing block (4), respectively, wherein a second fixing rod is fixed to each of the two first fixing rods (8), and the second fixing rods are perpendicular to the first fixing rods (8).

7. External fixator according to claim 2, characterised in that the adjusting nut (6) is an octahedral nut.

8. External fixator according to any of claims 1-7, characterized in that the drawplates (1) are shaped with a large end and a small middle.

9. External fixator according to claim 8, characterized in that the pulling plate (1) is screwed to the pulling needle (2).

10. The external fixator according to claim 9, wherein the traction plate (1) is provided with a threaded connection hole (11) in the center, the traction pin (2) is provided with a coarse thread section and a fine thread section inside the coarse thread section, and the fine thread section is connected with the threaded connection hole (11).

Technical Field

The invention relates to the technical field of medical instruments, in particular to an external fixing frame.

Background

Diabetic foot is a serious complication of diabetic patients, and chronic foot ulcer can be caused by lower limb angiopathy, combined infection and diabetic peripheral neuropathy, and the chronic foot ulcer gradually develops into chronic intractable wound surface and even deformity.

At present, the tension-stress principle of the Ilizarov technology is applied domestically, the diabetic foot is treated by the transverse tibial bone moving technology, the medial tibial bone block is pulled, the lower limb blood vessel regeneration is promoted, and the purpose of treating the diabetic foot is finally achieved. However, in the prior art, during the transverse bone moving process of the tibia, the cut infection is caused due to the large size of the tibial cutting bone block, and even the combined tibia osteomyelitis is caused. Therefore, there is a need in the art for a bone tissue removal external fixation frame that greatly reduces the size of the surgical incision and reduces the trauma to the bone tissue.

Disclosure of Invention

The invention aims to provide an external fixing frame which can well move bone tissues and can greatly reduce surgical incisions and wounds to the bone tissues.

In order to achieve the above object, the present invention provides an external fixing frame, which comprises a pulling plate, a pulling needle fixedly connected to the pulling plate, and a screw transmission mechanism fixedly connected to the pulling needle and driving the pulling needle to move axially.

Optionally, the device further comprises a first fixing block fixedly connected with the traction needle; the screw transmission mechanism comprises a second fixed block, a screw rod and an adjusting nut, the screw rod penetrates through the second fixed block and then is fixedly connected with the first fixed block, and the adjusting nut is arranged in the second fixed block and is in threaded connection with the screw rod.

Optionally, the cross section of the screw rod is fan-shaped, and the second fixed block is provided with a limiting hole which is matched with the screw rod to limit the rotation of the screw rod.

Optionally, a receiving groove for receiving the adjusting nut is formed in one side, close to the traction needle, of the second fixing block, and the adjusting nut extends out of the receiving groove.

Optionally, the screw is in threaded connection with a positioning nut, and the screw is fixed to the second fixing block through the positioning nut.

Optionally, the fixing device further comprises two first fixing rods fixedly connected to two ends of the second fixing block, wherein the two first fixing rods are fixedly connected to second fixing rods, and the second fixing rods are perpendicular to the first fixing rods.

Optionally, the adjustment nut is an octahedral nut.

Optionally, the shape of the pulling plate is big at two ends and small at the middle.

Optionally, the pulling plate is in threaded connection with the pulling pin.

Optionally, a threaded connection hole is formed in the center of the pulling plate, a coarse thread section and a fine thread section are arranged on the pulling needle and are arranged on the inner side of the coarse thread section, and the fine thread section is connected with the threaded connection hole.

Compared with the background art, the external fixing frame provided by the embodiment of the invention comprises the traction plate and the traction needle, wherein the traction plate is arranged between the tibia and the periosteum positioned on the surface of the tibia, and the traction needle is fixedly connected with the traction plate. The external fixing frame can be used for moving foot bone tissues of diabetic patients, when in use, a periosteum is peeled off under a tibial tubercle of the patient to intercept a small bone block (the bone block is not completely separated from the tibia), and the periosteum on the surface of the tibia is protected.

Therefore, the traction needle and the traction plate are driven to move, so that the periosteum is pulled while the bone block is pulled, the blood vessel network of the lower leg part can be promoted to regenerate, the new blood vessel is established, the nutrient blood of the lower leg part is increased, and the natural healing of the wound surface of the diabetic foot is promoted. Meanwhile, compared with the traditional arrangement mode of only pulling large-size bone blocks, the external fixing frame provided by the embodiment of the invention can simultaneously pull the cut bone blocks and periosteum through the pulling needle and the pulling plate, on one hand, the cut size of the bone blocks is smaller, and the operative incision and the wound on bone tissues can be greatly reduced; on the other hand, the bone block and the periosteum are promoted to be simultaneously pulled, so that the natural healing efficiency of the wound surface can be further improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural view of an external fixing frame according to an embodiment of the present invention;

fig. 2 is a schematic partial structure view of an external fixing frame according to an embodiment of the present invention;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a top view of FIG. 1;

FIG. 5 is a schematic view of the drawplate of FIG. 1;

fig. 6 is a schematic structural view of the adjusting nut in fig. 1.

Wherein:

the device comprises a traction plate 1, a thread connecting hole 11, a traction needle 2, a first fixing block 3, a second fixing block 4, an accommodating groove 41, a screw rod 5, an adjusting nut 6, a positioning nut 7 and a first fixing rod 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the invention is to provide an external fixing frame which can well move bone tissues and greatly reduce surgical incisions and wounds to the bone tissues.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

It should be noted that the following directional terms such as "upper end, lower end, left side, right side" and the like are defined based on the drawings of the specification.

Referring to fig. 1 to 6, fig. 1 is a schematic structural view of an external fixing frame according to an embodiment of the present invention; fig. 2 is a schematic partial structure view of an external fixing frame according to an embodiment of the present invention;

FIG. 3 is a front view of FIG. 1; FIG. 4 is a top view of FIG. 1; FIG. 5 is a schematic view of the drawplate of FIG. 1; fig. 6 is a schematic structural view of the adjusting nut in fig. 1.

The external fixing frame provided by the embodiment of the invention comprises a traction plate 1 and a traction needle 2, wherein the traction plate 1 is arranged between a tibia and a periosteum positioned on the surface of the tibia, the traction needle 2 is fixedly connected with the traction plate 1, the traction needle 2 is fixedly connected with a bone block cut from the tibia, and further the external fixing frame further comprises a thread transmission mechanism, the thread transmission mechanism is fixedly connected with the traction needle 2, and the thread transmission mechanism is used for driving the traction needle 2 to move along the axial direction.

It should be noted that the external fixing frame can be used for moving the bone tissue of the diabetic foot. When the traction apparatus is used, a periosteum is stripped under a tibial tubercle of a patient to cut a small bone block (the bone block is not completely separated from a tibia), the periosteum on the surface of the tibia is protected, firstly, the traction plate 1 is arranged between the cut tibial bone block and the periosteum on the surface of the tibia, then, the traction needle 2 is connected with the traction plate 1 and the bone block, and finally, the traction needle 2 is driven to move along the axial direction of the traction needle through the thread transmission mechanism. The traction needle 2 is driven by the thread transmission mechanism to move along the axial direction, so that the traction effect on bone blocks and periosteum can be realized.

Therefore, the traction needle 2 and the traction plate 1 are driven to move, so that the periosteum is pulled while the bone blocks are pulled, the neogenesis of the blood vessel network of the lower leg part can be promoted, the neovascular system is established, the nutrient blood of the lower leg part is increased, and the natural healing of the diabetic foot wound surface is promoted. Meanwhile, compared with the traditional arrangement mode of only pulling large-size bone blocks, the external fixing frame provided by the embodiment of the invention can simultaneously pull periosteum and the cut bone blocks through the threaded transmission mechanism, the pulling needle 2 and the pulling plate 1, on one hand, the cutting size of the bone blocks is small, and the surgical incision and the wound to bone tissues can be greatly reduced; on the other hand, the bone block and the periosteum are promoted to be simultaneously pulled, so that the natural healing efficiency of the wound surface can be further improved.

Furthermore, the external fixing frame also comprises a first fixing block 3, and the first fixing block 3 is fixedly connected with the traction needle 2. The thread transmission mechanism comprises a second fixed block 4, a screw rod 5 and an adjusting nut 6, wherein the screw rod 5 penetrates through the second fixed block 4 and then is fixedly connected with the first fixed block 3, and the adjusting nut 6 is arranged in the second fixed block 4 and is in threaded connection with the screw rod 5.

Thus, the adjusting nut 6 is rotated to drive the screw rod 5 to move up and down relative to the second fixing block 4, so as to drive the first fixing block 3 and the pulling needle 2 to move up and down.

Specifically, one side of the second fixing block 4 close to the pulling needle 2 is provided with a receiving groove 41, the receiving groove 41 is used for receiving the adjusting nut 6, and the adjusting nut 6 extends out of the receiving groove 41 so as to facilitate manual rotation.

In order to limit the rotation of the screw 5, the cross section of the screw 5 is fan-shaped or D-shaped, and correspondingly, the second fixing block 4 is provided with a limiting hole which cooperates with the screw 5 to limit the rotation of the screw 5, obviously, the limiting hole is embodied as a fan-shaped hole or a D-shaped hole.

It should be noted that the number of spacing hole is two, and two spacing holes are coaxial to be set up in the top and the below of holding tank 41, and two spacing holes communicate with holding tank 41. The screw 5 successively passes through the upper limiting hole, the accommodating groove 41 and the lower limiting hole from top to bottom, and is finally fixedly connected with the first fixing block 3. Wherein, first fixed block 3 is T type structure, and the one end of first fixed block 3 and tractive needle 2 rigid coupling, other end and screw rod 5 rigid coupling, screw rod 5 and tractive needle 2 parallel arrangement.

Compared with a circular screw rod, when the adjusting nut 6 is used for adjusting, the flexibility of the movement of the fan-shaped or D-shaped screw rod is good, the screw thread is not easy to clamp when the adjusting nut 6 rotates, and the operation is simple and labor-saving.

In addition, in order to lock the position of the screw 5, the screw 5 is connected with a positioning nut 7 in a threaded manner, and the screw 5 is fixed with the second fixing block 4 through the positioning nut 7, that is, when the adjusting nut 6 is rotated and the bone block and the traction plate 1 are moved to the preset traction position, the positioning nut 7 is screwed in at one end of the screw 5 far away from the first fixing block 3, so that the screw 5 is fixed on the second fixing block 4.

In order to fix the second fixing block 4 conveniently, the external fixing frame further comprises two first fixing rods 8 fixedly connected to two ends of the second fixing block 4 respectively, the two first fixing rods 8 are fixedly connected to the second fixing block 4 through locking screws, the two first fixing rods 8 are fixedly connected to second fixing rods, the second fixing rods are perpendicular to the first fixing rods 8, and when the external fixing frame is used, the second fixing rods are used for penetrating into shanks and fixedly connected with shin bones.

It should be noted that, the first dead lever 8 on both sides adopts the stronger carbon fiber stick material of the lightest hardness of quality, compares in traditional dead lever, and the length of first dead lever 8 in this embodiment has obviously shortened, and the total length of second fixed block 4 is 180mm in addition, and the shortening of first dead lever 8 length and the setting that the quantity of traction needle 2 is only one are special for the little incision of operation and the design of intercepting small-size bone piece, can make the external fixation frame more small and exquisite like this, and is lighter.

Preferably, the adjusting nut 6 may be an octahedral nut, which is more skid-proof than a conventional nut. During the use, realize the slow tractive of bone piece and periosteum through rotating adjusting nut 6, patient's postoperative divide into four slow rotations octahedral nut every day, once rotatory two faces, wherein, after octahedral nut rotatory a week, the displacement of tractive is 1mm, so both can reach the purpose of slow tractive, convenient calculation again.

In order to optimize the above embodiment, the drawplate 1 has a shape with two large ends and a small middle. Specifically, the drawplate 1 may be configured as a three-hole gourd-shaped steel plate structure, the middle of which is a long-strip structure, and the two ends of which are respectively a round head or an oval head structure with a diameter of 16 mm.

Thus, different from the common steel plate, the traction plate 1 of the three-hole gourd-shaped steel plate structure has a larger contact area between the part, which is placed into the periosteum, and has stronger comfortable feeling, thereby reducing the shearing force in the process of drawing the periosteum and reducing the pain of a patient in the process of drawing because the periosteum is stimulated.

On the basis of the above, the pulling plate 1 and the pulling needle 2 are preferably connected by screw threads, and the pulling plate 1 is made of titanium alloy steel plate. Specifically, the center of the traction plate 1 is provided with a threaded connection hole 11, the traction needle 2 is provided with a coarse thread section and a fine thread section arranged on the inner side of the coarse thread section, and the fine thread section is connected with the threaded connection hole 11.

More specifically, the coarse thread section is arranged at the tail end of the traction needle 2, has the length of 15mm, and is mainly used for tapping and drilling and screwing into a bone block (the bone block is pre-drilled); the interval between the fine thread section and the coarse thread section is 1.5mm, the length of the fine thread section is 2mm, and the fine thread section is used for being screwed and fixed with the central thread connecting hole 11 of the traction plate 1. The purpose of this arrangement is not to make the bone block and the traction plate 1 fall off when the traction needle 2 moves up and down, and to bear a certain traction force. When the bone block traction device is used, the traction needle 2 is firstly screwed through the bone cortex, then screwed into the traction plate 1, can fix the bone block and the traction plate 1 simultaneously, and is finally fixed on the first fixing block 3 through the stop screw.

The diameter of the coarse thread section is 3mm, and the diameter of the fine thread section is less than 3 mm.

The method of using the external fixator is described in detail below.

When the bone block traction device is used, a patient can peel off a periosteum under a tibial tubercle to cut a small bone block (the bone block is not completely separated from a tibia), and the periosteum on the surface of the tibia is protected, firstly, the traction plate 1 is arranged between the cut tibial bone block and the periosteum on the surface of the tibia, the threaded connecting hole 11 in the center of the traction plate 1 is aligned to the center of the bone block, then, the traction needle 2 is connected with the traction plate 1 and the bone block to ensure that the traction needle 2 tightly clamps the bone block and is screwed with the traction plate 1, and then the traction needle 2 is fixed on the first fixing block 3, and after operation, the traction needle 2 can be driven to move upwards by rotating the adjusting nut 6 clockwise, and the adjusting nut 6 can be rotated anticlockwise to drive the traction needle 2 to move downwards. The traction needle 2 moves upwards to keep a certain distance between the bone block and the lower leg bone, and the traction plate 1 also moves upwards to pull the periosteum. Through continuous rotation of the adjusting nut 6, the bone block and the periosteum are promoted to be simultaneously pulled, so that the blood vessel network of the shank part can be promoted to regenerate, the regenerated blood vessel is established, the nutrient blood of the shank part is increased, and the natural healing of the diabetic foot wound surface is promoted.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The external fixing frame provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are provided only to help understand the concepts of the present invention and the core concepts thereof. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.