CN220423949U - External fixing frame for tibia fracture - Google Patents

Abstract

The utility model relates to the technical field of medical instruments, in particular to an external fixing frame for tibial fracture. The external fixation frame comprises: the two semicircular supporting bodies are provided with a plurality of first arc-shaped holes, and each first arc-shaped hole is provided with an opening communicated with the outer wall surface of the supporting body; the two cylindrical support rods are respectively arranged in the first arc-shaped holes on the two support bodies in a penetrating way through the openings; two first Kirschner wires which are cylindrical are respectively arranged in two sections of tibia of the fracture in a penetrating way; a second Kirschner wire in column shape, which is arranged on one of the supporting bodies and is used for being penetrated in a section of tibia near the knee; the third Kirschner wire is arranged on the other support body and is used for penetrating the bone marrow cavity of the two sections of tibia through the ankle joint, the arc top of the third Kirschner wire is positioned at the fracture part, and the needle tip of the third Kirschner wire is inserted into the inner side wall of the bone marrow cavity of the section of tibia close to the knee. The scheme has the advantages of convenient operation, small wound and reliable fixation.

Description

External fixing frame for tibia fracture

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an external fixing frame for tibial fracture.

Background

Tibial fractures are the most common long tubular bone fractures in clinic, and can occur at any age with an incidence of 8% -15% of the total body fractures. The tibial anatomy is special, with less anterolateral soft tissue coverage, most fragile at the medial-inferior 1/3 interface, and most common in the medial-inferior fracture after suffering high energy injury. In addition, the tibia has poor blood circulation, and main nutrient blood vessels penetrate into a nourishing hole from the rear outer side of the 1/3 juncture in the tibia stem, so that complications such as delayed fracture healing, nonunion and soft tissue necrosis are very easy to occur after fracture occurs in the middle and lower sections of the tibia.

The middle and lower section fracture of the tibia has two options of surgical treatment and non-surgical treatment, but with the increase of high-energy injuries such as industrial and traffic accidents, patients who need to receive surgical treatment after fracture are also increased gradually, and the selection of treatment schemes thereof still has a plurality of disputes clinically. In the face of tibia middle-lower segment fracture with different injury degrees, people should take the principal in clinic, and personalized and targeted diagnosis and treatment service is provided for patients in the long-term benefit of patient lower limb function recovery.

At present, various treatment methods are available, the application of conservative treatment such as plaster fixation, support fixation, calcaneus traction and the like is limited, the method is only suitable for small displacement fracture caused by low-energy trauma, and the surgical treatment comprises effective fixation modes such as steel plates, intramedullary nails, MIPPO, external fixation brackets and the like, and can be used for fracture caused by high-energy injury. The use of steel plates for fixation results in greater surgical trauma and increases the destruction of blood circulation at the fracture site, thereby increasing the probability of delayed healing and skin necrosis. The intramedullary nail can increase the pressure in the intramedullary cavity, increase the risk of fat embolism, seriously damage the blood circulation in the intramedullary cavity and have adverse effect on the healing of fracture.

In view of this, there is a need for an external fixation frame for tibial fractures that solves the above-mentioned problems.

Disclosure of Invention

The embodiment of the utility model describes an external fixing frame for tibial fracture, which has the advantages of convenient operation, small trauma and reliable fixation.

One embodiment of the present utility model provides an external fixation frame for a tibial fracture, comprising:

the support body is provided with a plurality of first arc-shaped holes, and each first arc-shaped hole is provided with an opening communicated with the outer wall surface of the support body;

the two cylindrical support rods are respectively penetrated into the first arc-shaped holes on the two support bodies through the openings, and each support rod is provided with external threads so as to fix the support rod with the support bodies through a first thread component;

two first Kirschner wires in column shape, each first Kirschner wire is arranged on one support body, and each first Kirschner wire is used for penetrating into two sections of fractured tibia;

the second Kirschner wire is arranged on one of the supporting bodies and is used for penetrating into a section of tibia close to the knee;

the third Kirschner wire is arranged on the other support body and is used for being penetrated into the marrow cavity of the two sections of tibia through the ankle joint, the arc top of the third Kirschner wire is positioned at the fracture position, and the needle tip of the third Kirschner wire is inserted into the inner side wall of the marrow cavity of the section of tibia close to the knee.

According to the embodiment, the support body is made of carbon fiber materials; and/or the number of the groups of groups,

the first Kirschner wire, the second Kirschner wire and the third Kirschner wire are all made of stainless steel materials.

According to the embodiment, the support body is further provided with a plurality of weight-reducing round holes.

According to the above embodiment, each support rod is provided with a movable connector, so that two support bodies are horizontally offset.

According to the above embodiment, the first screw assembly includes a first nut and a first nut, and the first nut are respectively disposed on both sides of one of the supporting bodies.

According to the above embodiment, each of the first k-wires is fixed to the support body through a second screw assembly, and the second screw assembly is inserted into the first arc-shaped hole.

According to the above embodiment, the second screw assembly comprises a second nut and a first bolt, the end cap of the first bolt being provided with a groove for receiving the first k-wire, the end cap and the support body being for clamping the first k-wire.

According to the embodiment, the second k-wire and the third k-wire are fixed on the support body sequentially through the lock needle part, the L-shaped connecting piece and the third thread component which are rotatably connected, and the third thread component is arranged in the first arc-shaped hole in a penetrating manner;

the lock needle part comprises a first fixed end used for fixing the second Kirschner wire or the third Kirschner wire and a second fixed end used for fixing the connecting piece, and a second bolt is arranged between the first fixed end and the second fixed end in a penetrating way, so that the first fixed end and the second fixed end are fixed and rotated by adjusting the second bolt.

According to the above embodiment, the connecting member includes a connecting rod having a cylindrical shape and a connecting plate having a plate shape, the connecting rod is connected to the second fixed end and the connecting plate, respectively, and the connecting plate is connected to the connecting rod and the third screw member, respectively.

According to the embodiment, the connecting plate is provided with a mounting round hole and a second arc hole, the mounting round hole is used for mounting the connecting rod, and the third thread assembly penetrates through the first arc hole and the second arc hole.

According to the external fixator for tibial fracture provided by the embodiment of the utility model, the two first Kirschner wires are arranged in two sections of fractured tibia in a penetrating manner, the second Kirschner wire which is columnar is arranged in one section of tibia close to the knee in a penetrating manner, and the third Kirschner wire which is arc-shaped is arranged in the marrow cavity of the two sections of tibia through the ankle joint while the arc top of the third Kirschner wire is positioned at the fracture position, so that the needle point of the third Kirschner wire is inserted into the inner side wall of the marrow cavity of one section of tibia close to the knee, and the external fixator fixation operation is used as a semi-invasive fixation method, and has the advantages of convenience in operation and smaller trauma to a patient suffering from tibial fracture; and by additionally arranging a second Kirschner wire which is cylindrical and a third Kirschner wire which is arc-shaped, an additional biomechanical stabilization point can be provided for the external fixing frame, so that the defect of unstable fixation of a single external fixing frame is overcome, and the accuracy of the curative effect is ensured. The method has been practically applied to clinical practice and achieves good therapeutic effects. Therefore, the technical scheme has the advantages of convenient operation, small wound and reliable fixation.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic structural view of an external fixation frame for a tibial fracture according to one embodiment.

Reference numerals:

1-a support;

11-a first arcuate aperture;

111-opening;

12-a weight-reducing round hole;

2-a support bar;

21-a movable connector;

22-a first threaded assembly;

3-a first k-wire;

31-a second threaded assembly;

4-a second k-wire;

5-third k-wire;

6-locking the needle component;

61-a first fixed end;

62-a second fixed end;

63-a second bolt;

7-connecting piece;

71-connecting rods;

72-connecting plates;

721-mounting a round hole;

722-a second arcuate aperture;

8-third thread assembly.

Detailed Description

The scheme provided by the utility model is described below with reference to the accompanying drawings.

Fig. 1 shows a schematic structural view of an external fixation frame for a tibial fracture according to one embodiment.

As shown in fig. 1, the external fixation frame for tibial fractures includes:

the two semicircular supporting bodies 1 are oppositely arranged (namely, semicircular openings shown in fig. 1 are opposite in direction), a plurality of first arc-shaped holes 11 are formed in each supporting body 1, and each first arc-shaped hole 11 is provided with an opening 111 communicated with the outer wall surface of the supporting body 1;

two cylindrical support rods 2, each support rod 2 is penetrated into a first arc-shaped hole 11 on two support bodies 1 through an opening 111, and each support rod 2 is provided with external threads (not shown in the figure) so as to fix the support rod 2 with the support bodies 1 through a first thread assembly 22;

two first k-wires 3 in a column shape, each first k-wire 3 is arranged on one supporting body 1, and each first k-wire 3 is used for penetrating into two sections of tibia (not shown in the figure) of fracture;

a second k-wire 4 with a column shape is arranged on one of the supporting bodies 1 and is used for penetrating into a section of tibia near the knee;

the arc-shaped third Kirschner wire 5 is arranged on the other support body 1 and is used for penetrating the bone marrow cavity of the two sections of tibia through the ankle joint, the arc top of the third Kirschner wire 5 is positioned at the fracture part, and the needle tip of the third Kirschner wire 5 is inserted into the inner side wall of the bone marrow cavity of the section of tibia close to the knee.

In the embodiment, the two first Kirschner wires 3 are arranged in two sections of fractured tibia in a penetrating way, one columnar second Kirschner wire 4 is arranged in one section of tibia close to the knee in a penetrating way, one arc-shaped third Kirschner wire 5 is arranged in the marrow cavity of the two sections of tibia in a penetrating way through the ankle joint, and the arc top of the arc-shaped third Kirschner wire 5 is positioned at the fracture position, so that the needle point of the third Kirschner wire 5 is inserted into the inner side wall of the marrow cavity of one section of tibia close to the knee, and the external fixing frame fixing operation is used as a semi-invasive fixing method, so that the method has the advantages of convenience in operation and less trauma to a patient suffering from tibia fracture; and through adding a second Kirschner wire 4 which is in a column shape and a third Kirschner wire 5 which is in an arc shape, an additional biomechanical stabilization point can be provided for the external fixing frame, thereby overcoming the defect of unstable fixation of a single external fixing frame and ensuring the accuracy of curative effect. The method has been practically applied to clinical practice and achieves good therapeutic effects. Therefore, the technical scheme has the advantages of convenient operation, small wound and reliable fixation.

In some embodiments, the first k-wire 3 and the third k-wire 5 have a diameter of 2.5-3.5 mm and the second k-wire 4 has a diameter of 1.5-2.5 mm.

In one embodiment of the utility model, the support 1 is made of carbon fiber material. By the arrangement, the structural strength of the support body 1 can be increased, and meanwhile, the weight of the whole external fixing frame can not be excessively increased, so that the pain of a patient suffering from the tibial fracture can be reduced as much as possible.

In one embodiment of the present utility model, the first k-wire 3, the second k-wire 4 and the third k-wire 5 are all made of stainless steel materials. Of course, the first k-wire 3, the second k-wire 4 and the third k-wire 5 may also be made of titanium alloy materials. Stainless steel materials are preferable because they are cheaper than titanium alloy materials.

In one embodiment of the present utility model, the support body 1 is further provided with a plurality of weight-reducing circular holes 12. So arranged, to further reduce pain in patients with tibial fractures.

In one embodiment of the present utility model, each support rod 2 is provided with a movable joint 21 to horizontally shift the two support bodies 1. By the arrangement, the fractured tibia can be placed to be everted or everted, so that the growth and fusion of the fractured ends are facilitated.

The specific structure of the movable joint 21 is not shown in fig. 1. In order to enable those skilled in the art to know the specific structure of the movable joint 21, the source that can be queried is described herein, for example, the NPW28-a180180 degree fixed outer joint produced by the company "Shenzhen norubishi" of the scientific development limited, i.e. the structure similar to the 180 degree movable outer joint of the product is the specific structure of the movable joint 21 described in the embodiment.

In one embodiment of the present utility model, the first screw assembly 22 includes a first nut and a first nut, which are respectively disposed at both sides of one of the supporting bodies 1.

In one embodiment of the present utility model, each of the first k-wires 3 is fixed to the support body 1 by a second screw assembly 31, and the second screw assembly 31 is inserted into the first arc-shaped hole 11.

In one embodiment of the utility model, the second threaded assembly 31 comprises a second nut and a first bolt, the end cap of which is provided with a groove (not shown in the figures) for receiving the first k-wire 3, and the end cap and the support 1 for clamping the first k-wire 3. This arrangement ensures that the first k-wire 3 is securely locked.

In one embodiment of the utility model, the second k-wire 4 and the third k-wire 5 are fixed on the support body 1 sequentially through a lock needle part 6, an L-shaped connecting piece 7 and a third thread component 8 which are rotatably connected, and the third thread component 8 is penetrated in the first arc-shaped hole 11;

the locking pin part 6 includes a first fixing end 61 for fixing the second k-wire 4 or the third k-wire 5 and a second fixing end 62 for fixing the connection member 7, and a second bolt 63 is penetrated between the first fixing end 61 and the second fixing end 62 so that the first fixing end 61 and the second fixing end 62 are fixed and rotated by adjusting the second bolt 63.

In the embodiment, the space positions of the second k-wire 4 and the third k-wire 5 can be freely adjusted by arranging the lock needle part 6 which is rotatably connected and the L-shaped connecting piece 7, so that the implementation of a fixed operation by a doctor is more convenient.

In one embodiment of the present utility model, the connection member 7 includes a connection rod 71 having a cylindrical shape and a connection plate 72 having a plate shape, the connection rod 71 being connected to the second fixed end 62 and the connection plate 72, respectively, and the connection plate 72 being connected to the connection rod 71 and the third screw member 8, respectively.

In one embodiment of the present utility model, the connection plate 72 is provided with a mounting circular hole 721 and a second arc hole 722, the mounting circular hole 721 for mounting the connection rod 71, and the third screw member 8 is penetrated in the first arc hole 11 and the second arc hole 722.

In the present embodiment, by providing the connection plate 72 having the second arc-shaped hole 722, the spatial positions of the second k-wire 4 and the third k-wire 5 can be more conveniently adjusted.

When the external fixing frame is used for fixing operation, the method can be carried out according to the following steps:

1) Pre-bending a Kirschner wire with the diameter of 1.5-2.5 mm into an arc shape to prepare a second Kirschner wire 4 which enters the marrow cavity from the ankle joint;

2) Closing the fracture end of the reduction bone, and continuously entering the second Kirschner wire 4 to enable the arc top of the second Kirschner wire to be positioned at the fracture part, wherein the needle point reaches the inner side wall of the proximal medullary cavity; after X-ray perspective meets the requirements, the second Kirschner wire 4 is knocked down in a proper direction, so that the needle tip of the second Kirschner wire is inserted into the inner side wall to be fixed;

3) Taking two first Kirschner wires 3 with diameters of 2.5-3.5 mm, traversing to penetrate through proximal and distal tibial cortex, parallel to knee ankle joint surface, installing two supporting bodies 1, fixing by threads of two supporting rods 2, and locking after traction;

4) A third k-wire 5 is inserted 3-5 cm from the proximal fracture line, locked to the proximal support 1 by a locking member 6, and the second k-wire 4 is locked to the distal support 1 by another locking member 6, thereby completing the fixation operation.

It is noted that relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. An external fixation frame for a tibial fracture, comprising:

the device comprises two semicircular supporting bodies (1), wherein the two supporting bodies (1) are oppositely arranged, a plurality of first arc-shaped holes (11) are formed in each supporting body (1), and an opening (111) communicated with the outer wall surface of each supporting body (1) is formed in each first arc-shaped hole (11);

two cylindrical support rods (2), wherein each support rod (2) is penetrated into the first arc-shaped holes (11) on the two support bodies (1) through the opening (111), and each support rod (2) is provided with external threads so as to fix the support rod (2) with the support body (1) through a first thread assembly (22);

two first Kirschner wires (3) in a column shape, wherein each first Kirschner wire (3) is arranged on one supporting body (1), and each first Kirschner wire (3) is used for being penetrated in two sections of tibia of a fracture;

a second Kirschner wire (4) with a column shape is arranged on one of the supporting bodies (1) and is used for penetrating into a section of tibia near the knee;

the third Kirschner wire (5) is arranged on the other support body (1) and is used for penetrating into the marrow cavity of the two sections of tibia through the ankle joint, the arc top of the third Kirschner wire (5) is positioned at the fracture position, and the needle tip of the third Kirschner wire (5) is inserted into the inner side wall of the marrow cavity of the section of tibia close to the knee.

2. External fixator for tibial fractures according to claim 1, wherein the support body (1) is made of carbon fibre material; and/or the number of the groups of groups,

the first Kirschner wire (3), the second Kirschner wire (4) and the third Kirschner wire (5) are all made of stainless steel materials.

3. External fixator for tibial fractures according to claim 1, characterized in that the support body (1) is further provided with a plurality of weight-reducing circular holes (12).

4. External fixator for tibial fractures according to claim 1, wherein each of said support rods (2) is provided with a movable joint (21) to horizontally offset both of said supports (1).

5. External fixator for tibial fractures according to claim 1, wherein said first threaded assembly (22) comprises a first nut and a first nut, respectively arranged on both sides of one of said supports (1).

6. External fixation frame for tibial fractures according to claim 1, characterized in that each of said first k-wire (3) is fixed to said support body (1) by means of a second threaded assembly (31), said second threaded assembly (31) being threaded in said first arched hole (11).

7. External fixation frame for tibial fractures according to claim 6, wherein said second threaded assembly (31) comprises a second nut and a first bolt, the end cap of said first bolt being provided with a groove for receiving said first k-wire (3), said end cap and said support body (1) being adapted to clamp said first k-wire (3).

8. External fixation frame for tibial fractures according to any of claims 1-7, wherein the second k-wire (4) and the third k-wire (5) are each fixed to the support body (1) in sequence by a rotatably connected locking pin part (6), an L-shaped connecting piece (7), a third threaded assembly (8), the third threaded assembly (8) being threaded in the first arcuate hole (11);

the lock needle part (6) comprises a first fixed end (61) for fixing the second Kirschner wire (4) or the third Kirschner wire (5) and a second fixed end (62) for fixing the connecting piece (7), and a second bolt (63) is arranged between the first fixed end (61) and the second fixed end (62) in a penetrating way, so that the first fixed end (61) and the second fixed end (62) are fixed and rotated by adjusting the second bolt (63).

9. External fixator for tibial fractures according to claim 8, wherein said connecting element (7) comprises a connecting rod (71) in the form of a cylinder and a connecting plate (72) in the form of a plate, said connecting rod (71) being connected to said second fixed end (62) and to said connecting plate (72), respectively, said connecting plate (72) being connected to said connecting rod (71) and to said third threaded assembly (8), respectively.

10. External fixation frame for tibial fractures according to claim 9, characterized in that the connection plate (72) is provided with a mounting circular hole (721) and a second arc-shaped hole (722), the mounting circular hole (721) being used for mounting the connection rod (71), the third screw assembly (8) being threaded in the first arc-shaped hole (11) and the second arc-shaped hole (722).