CN217772484U - Guide piece for threading needle of external fixing frame and external fixing frame assembly - Google Patents

Abstract

The present application provides a guide and an external fixator assembly for piercing a needle with an external fixator. The external fixator is arranged around the outer periphery of the target site and includes a plurality of installation holes arranged along its surrounding direction, through which the needle can pass. The target part is fixed between the two mounting holes, the guide part includes a curved guide plate and a connecting structure, the curved guide plate is attached to the surface of the target part, and the curved guide plate is formed with a first concave part, a second concave part and a third concave part, The curved guide plate includes a first end and a second end in the bending direction and a third end and a fourth end opposite in the extending direction, and the distances between the first concave portion, the second concave portion and the third concave portion and the first plane decrease in sequence, The first plane is perpendicular to the extension direction and located on the side of the fourth end away from the third end; the connection structure is connected between the curved guide plate and the external fixation frame, so that the curved guide plate is fixed in the surrounding space of the external fixation frame. The guide provided by the present application greatly improves the accuracy of the needle insertion position.

Description

Guide and External Fixator Assembly for Needle Threading of External Fixator

technical field

The present application relates to the technical field of medical devices, in particular to a guide member and an external fixator assembly for piercing a needle with an external fixator.

Background technique

Long bone fractures are common clinical fracture types, among which tibial fractures have the highest incidence rate among long bone fractures. Most open tibial fractures require primary treatment with external fixators, among which Ilizarov external fixators are the most widely used. The Taylor space external fixation bracket derived on this basis has greatly solved the problems of fixation and fracture healing of open fractures of long bones.

In the process of applying the external fixator, there will always be a problem of selecting the needle insertion position. An inaccurate needle insertion position will make it difficult to maintain the fractured limb in the center of the annular external fixator, and then the annular external fixator cannot provide the maximum rigid support, and the cutting stress on the bone after the needle is fixed will seriously affect the healing of the fracture site , and may lead to local suppuration at the fracture site, so the needle insertion position is particularly important.

Utility model content

The embodiment of the present application provides a guide member and an external fixator assembly for threading a needle with an external fixator, so as to improve the accuracy of the needle insertion position during the use of the external fixator.

In the first aspect, the embodiment of the present application provides a guide for passing a needle with an external fixator. The external fixator is arranged around the outer periphery of the target site and includes a plurality of installation holes arranged along the surrounding direction. The needle can Threaded through the target site and secured between two mounting holes, the guide consists of:

The curved guide plate is attached to the surface of the target part, the curved guide plate is formed with a first recess, a second recess and a third recess, the curved guide plate includes a first end and a second end in the bending direction and opposite to each other in the extending direction The third end and the fourth end, the first end is inwardly recessed to form at least one of the first recess, the second recess and the third recess, and the second end is inwardly recessed to form the first recess, the second recess and the first recess For the remaining part of the three recesses, the distances between the first recess, the second recess and the third recess and the first plane decrease successively, the first plane is perpendicular to the extension direction and is located on the side of the fourth end away from the third end, the first recess, the second recess The concave surfaces of the second concave part and the third concave part are used to realize the positioning of the needle;

The connection structure is connected between the curved guide plate and the external fixation frame, so that the curved guide plate is fixed in the surrounding space of the external fixation frame.

In some embodiments, one of the first recess, the second recess and the third recess is disposed at the first end, and the other two are disposed at the second end.

In some embodiments, the curved guide further includes at least one avoidance recess corresponding to one or two of the first recess, the second recess and the third recess, so that the needle passes through the curved guide.

In some embodiments, the number of the avoidance recess is one, and corresponds to the second recess; one of the second recess and the avoidance recess and the first recess are located at the first end, and the other of the second recess and the avoidance recess is at the first end. The third recess is located at the second end.

In some embodiments, the second concave portion, the escape portion and the first concave portion are located on one side of the external fixator in the circumferential direction, the third concave portion is located on the other side of the external fixator in the circumferential direction, and the second concave portion or the avoidance portion is in contact with the first concave portion. A concave part communicates with each other.

In some embodiments, the connecting structure includes a first arm and a second arm arranged along the bending direction, one end of the first arm and one end of the second arm are respectively connected to the curved guide plate, and the first arm The other end of the arm and the other end of the second arm are respectively connected to the external fixation frame through mounting holes.

In some embodiments, the thickness of the curved guide plate is 2 mm to 6 mm, and the length of the curved guide plate along the extending direction is 50 mm to 120 mm.

In some embodiments, the lengths of the first recess, the second recess and the third recess along the extending direction are 2.5 mm˜5 mm.

In a second aspect, the embodiment of the present application further provides an external fixator assembly, including the above-mentioned guide piece, an external fixator and a needle.

In some embodiments, it also includes a plurality of guide sleeves adapted to the needle, the guide sleeves are fixed in the installation hole, one end of the guide sleeve is used for inserting the needle, and the other end abuts against the concave surface.

The guide provided by the embodiment of the present application cooperates with the external fixator during use, and the first recess, the second recess and the third recess are used in conjunction with the mounting holes on the external fixator according to the preoperative plan, and then the doctor uses the guide according to the guide and the external fixator. The needle insertion direction and needle insertion position formed by the operation of the fixed frame are very close to the needle insertion direction and needle insertion position planned before the operation, which greatly improves the accuracy of the needle insertion position and reduces the needling of the doctor's planned needle insertion position and experience. The error of the actual needle position can minimize the complications caused by nerve and blood vessel damage, and reduce unnecessary damage to bones and soft tissues.

Description of drawings

The features, advantages, and technical effects of the exemplary embodiments of the present application will be described below by referring to the accompanying drawings.

Fig. 1 is a structural schematic diagram of the cooperation between an external fixator assembly and a target part according to an embodiment of the present application;

2 is a schematic structural view of an external fixator assembly according to an embodiment of the present application;

Fig. 3 is a schematic structural view of a curved guide plate according to an embodiment of the present application;

Fig. 4 is a schematic structural diagram of another external fixator assembly and a target site according to an embodiment of the present application.

Reference signs:

1. Guide piece;

11, curved guide plate; 111, first recess; 112, second recess; 113, third recess; 114, first end; 115, second end; 116, third end; 117, fourth end; 118, Avoidance recess; 12. Connection structure; 121. First support arm; 122. Second support arm; 123. Installation matching hole;

2. External fixator;

21. Mounting hole;

3. Needle;

31. The first needle; 32. The second needle; 33. The third needle;

4. Target part;

5. Guide sleeve;

6. External fixator components;

X, extension direction.

Detailed ways

The implementation manner of the present application will be further described in detail below with reference to the drawings and embodiments. The detailed description and drawings of the following embodiments are used to illustrate the principles of the application, but not to limit the scope of the application, that is, the application is not limited to the described embodiments.

In the description of this application, it should be noted that, unless otherwise specified, the meaning of "plurality" is more than two; the terms "upper", "lower", "left", "right", "inner", " The orientation or positional relationship indicated by "outside" and so on are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a reference to this application. Application Restrictions. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

The orientation words appearing in the following description are the directions shown in the figure, and do not limit the specific structure of the application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be interpreted in a broad sense, for example, it can be a fixed connection or a flexible connection. Disassembled connection, or integral connection; it can be directly connected or indirectly connected through an intermediary. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In order to better understand the present application, the following describes the embodiment of the present application with reference to FIG. 1 to FIG. 4 .

The inventors found that when a patient with a fracture is treated with the external fixator 2 , the needle entry point plays a vital role in affecting the healing of the fracture site. When the doctor inserts the needle, although the position of the needle has been planned in advance, the actual insertion will inevitably deviate from the planned position, which may cause nerve and blood vessel damage and lead to complications, and cause adverse effects on bones and soft tissues. necessary damage.

In order to solve the above problems, the present application provides a guide 1 for needle threading of an external fixator, so as to position the needle when threading the needle, reduce the deviation that may be caused during actual insertion, and make the needle insertion position as close as possible to the planned position .

Fig. 1 is a schematic structural diagram of an external fixator assembly of an embodiment of the present application cooperating with a target site; Fig. 2 is a schematic structural diagram of an external fixator assembly of an embodiment of the present application; Fig. 3 is a schematic diagram of an external fixator assembly of an embodiment of the present application Schematic diagram of the structure of the curved guide plate.

Please refer to Fig. 1 to Fig. 3, the present application provides a kind of guide piece 1 that is used for external fixator to pass the needle. holes 21 through which the needle 3 can pass through the target site 4 and be fixed between the two mounting holes 21 .

The guide 1 includes a curved guide plate 11 and a connecting structure 12 . The curved guide plate 11 is attached to the surface of the target site 4. The curved guide plate 11 is formed with a first recess 111, a second recess 112 and a third recess 113. The curved guide plate 11 includes a first end 114 and a second end in the bending direction. end 115 and the third end 116 and the fourth end 117 opposite to each other in the extension direction X, the first end 114 is inwardly recessed to form at least one of the first recess 111, the second recess 112 and the third recess 113, the second The end 115 is inwardly recessed to form the remainder of the first recess 111, the second recess 112 and the third recess 113, and the distances from the first recess 111, the second recess 112 and the third recess 113 to the first plane decrease successively, and the first The plane is perpendicular to the extension direction X and is located on the side of the fourth end 117 away from the third end 116 . The concave surfaces of the first recess 111 , the second recess 112 and the third recess 113 are used for positioning the needle 3 . The connection structure 12 is connected between the curved guide plate 11 and the external fixator 2 , so that the curved guide plate 11 is fixed in the surrounding space of the external fixator 2 .

It should be noted that the target site 4 is a site that needs to be threaded and fixed.

It should be noted that at least one of the first recess 111 , the second recess 112 and the third recess 113 is formed on the first end 114 inwardly, and the second end 115 is recessed inwardly to form the first recess 111 and the second recess. 112 and the remaining part of the third recess 113 means that the first end 114 is recessed inwardly to form one, two or all of the first recess 111, the second recess 112 and the third recess 113, correspondingly, The second end 115 is recessed inward to form the remaining two, one or none of the first recess 111 , the second recess 112 and the third recess 113 .

Specifically, the first recess 111 , the second recess 112 and the third recess 113 are formed by the end surfaces of the first end 114 and/or the second end 115 being recessed toward the inside of the curved guide plate 11 along the bending direction.

It should be noted that the extension direction X of the curved guide plate 11 is parallel to its length direction. In one embodiment, the extending direction X of the curved guide plate 11 is perpendicular to the bending direction.

In one embodiment, the shape of the external fixator 2 is ring or U-shape. Of course, other shapes that can surround the target site 4 and have an opening are also possible, and the present application does not make too much limitation here.

It should be noted that the enclosing direction of the external fixator 2 refers to its bending direction.

In one embodiment, the concave surface is a curved surface. Of course, it may also be a plane, and the present application does not make too much limitation here.

It should be noted that the concave surface refers to the surface farthest from the end surface of the first end 114 and/or the second end 115 among the first concave portion 111 , the second concave portion 112 and the third concave portion 113 .

In one embodiment, the connecting structure 12 and the curved guide plate 11 are integrally formed, and the connecting structure 12 and the external fixator 2 are positioned through the mounting holes 21 and connected and fixed by bolts and nuts.

In one embodiment, the two ends of the needle 3 are fixed to the two mounting holes 21 in a threaded manner.

In one embodiment, the shape of the curved guide plate 11 is made by 3D printing technology. Specifically, the 3D model of the target part 4 can be reconstructed according to the CT data of the target part 4; the initial model of the curved guide plate 11 that fits the topographic surface of the target part 4 can be generated through the wrapping function; combined with treatment experience and image data , select the needle threading position of the external fixator 2 and the curved guide plate 11; establish the connection structure 12 between the curved guide plate 11 and the external fixator 2; use Boolean operations to remove the needle threading area on the curved guide plate 11 to form the first The concave part 111, the second concave part 112 and the third concave part 113; merge the curved guide plate 11 and the connection structure 12; generate the model of the curved guide plate 11, and obtain the curved guide plate 11 through rapid prototyping and 3D printing technology.

When the guide member 1 provided in the embodiment of the present application is used, the connecting structure 12 is first fixed on the set mounting hole 21 of the external fixator 2 according to the doctor's plan before the operation, and then the curved guide plate 11 is attached to the target site 4 ( That is, related bony protrusion), so as to realize that the external fixator 2 is in the predetermined position before operation. The external fixator 2 has determined two first mounting holes corresponding to the first concave portion 111, two second mounting holes corresponding to the second concave portion 112, and two corresponding to the third concave portion 113 according to the preoperative planning. a third mounting hole. Wherein, the depression depths of the first concave portion 111 , the second concave portion 112 and the third concave portion 113 are also determined according to the preoperatively planned needle insertion positions. Therefore, the direction and needle insertion position of the first needle 31 are determined by any one of the two first mounting holes and the concave surface of the first recess 111, and by any one of the two second mounting holes and the second recess. The concave surface of 112 determines the needle-entry direction and needle-entry position of the second needle 32, and the needle-entry direction and needle entry position of the third needle 33 are determined by any one of the two third mounting holes and the concave surface of the third recess 113. Therefore, the doctor inserts the needle according to the above-mentioned needle insertion direction and needle insertion position, which greatly improves the accuracy of the insertion position.

The guide 1 provided in the embodiment of the present application is used in cooperation with the external fixator 2, and the first recess 111, the second recess 112 and the third recess 113 are used in conjunction with the mounting holes 21 on the external fixator 2, and then the doctor follows the guide The needle insertion direction and needle insertion position formed by the operation of part 1 and external fixator 2 are very close to the needle insertion direction and needle insertion position planned before the operation, which greatly improves the accuracy of the needle insertion position and reduces the needle insertion position planned by the doctor. And relying on the error of the actual needle insertion position operated by experience, the complications caused by nerve and blood vessel damage are minimized, and unnecessary damage to bones and soft tissues is reduced. It should be noted that the above operation based on experience means that the doctor inserts the needle according to the preoperative plan based on experience. Needle insertion based on experience has many uncertain factors, which is likely to cause errors with the planned needle insertion position.

Moreover, the distances between the first concave portion 111, the second concave portion 112 and the third concave portion 113 and the first plane decrease successively, so that after the needles are inserted, the first needle 31, the second needle 32 and the third needle The distances from 33 to the first plane will also decrease successively, that is, the three needles 3 will not be located in the same plane parallel to the first plane, and will not interfere with each other.

In some embodiments, one of the first recess 111 , the second recess 112 and the third recess 113 is disposed at the first end 114 , and the other two are disposed at the second end 115 .

If the first concave part 111, the second concave part 112 and the third concave part 113 are all arranged at the same end, then when the needle 3 is inserted, it needs to be inserted on the same side of the curved guide plate 11, which is inconvenient during operation and can hardly be used by many people. Operating the needle insertion reduces the operating efficiency, and also reduces the structural strength of the end of the curved guide plate 11 . Therefore, such setting can improve the operation efficiency and ensure the structural strength of the curved guide plate 11 .

Please continue to refer to FIG. 3 , in some embodiments, the curved guide plate 11 further includes at least one avoidance recess 118 , the avoidance recess 118 and one or both of the first recess 111 , the second recess 112 and the third recess 113 Correspondingly, so that the needle 3 passes through the curved guide plate 11. The escape recess 118 is formed at the first end 114 and/or the second end 115 , and is formed by indenting the first end 114 and/or the second end 115 toward the inside of the curved guide plate 11 along the bending direction. Specifically, the escape recess 118 is formed at an end opposite to the end where the first recess 111 , the second recess 112 or the third recess 113 is located. For example, the escape recess 118 corresponds to the first recess 111 , and when the first recess 111 is located at the first end 114 , the avoidance recess 118 is located at the second end 115 .

The avoidance recess 118 is provided to avoid the needle 3, so that the structural layout of the first recess 111, the second recess 112 and the third recess 113 in the curved guide plate 11 is more reasonable and more convenient to use.

And, the number of avoidance recesses 118 is set to one or two, instead of setting the first recess 111, the second recess 112 and the third recess 113 to set corresponding avoidance recesses 118, on the one hand, setting three avoidance recesses 118 will The structural strength of the first end 114 and the second end 115 is reduced and they are easily damaged; on the other hand, the first needle 31, the second needle 32 and the third needle 33 are fixed in the first plane. The projections of the projections are in a state of intersecting each other, and there is a relatively large angle between them. Therefore, the existence of three avoidance recesses 118 means that the curved length of the curved guide plate 11 is relatively long, and the longer curved guide plate 11 is inconvenient to fit and hold. The following operations, and at the same time the processing and production are also more troublesome.

In some embodiments, there is one avoidance recess 118, which corresponds to the second recess 112; one of the second recess 112 and the avoidance recess 118 and the first recess 111 are located at the first end 114, and the second recess 112 and The other of the escape recesses 118 and the third recess 113 are located at the second end 115 .

It should be noted that, during use, both the concave surface of the second concave portion 112 and the concave surface of the avoidance concave portion 118 can cooperate with the second mounting hole to position the second needle 32, that is, the second concave portion 112 and the avoidance concave portion 118 functions are interchangeable.

Further, the recess depths of the escape recess 118 and the second recess 112 are both smaller than the recess depths of any one of the first recess 111 and the second recess 112 .

The avoidance recess 118 corresponds to the second recess 112, and the first recess 111 is arranged at the first end 114, and the third recess 113 is arranged at the second end 115, and the first recess 111 and the third recess 113 have no corresponding avoidance recess 118 , so that the angle between the first needle 31 corresponding to the first recess 111 and the third needle 33 corresponding to the third recess 113 is the largest, while the second needle 32 corresponding to the second recess 112 and the escape recess 118 The included angles formed with the first needle 31 and the third needle 33 are all small, that is, the first needle 31, the second needle 32 and the third needle 33 are sequentially twisted and arranged, such an arrangement can make The fixation effect of the fractured limb is better, the fixation is more stable, and the damage to the target part 4 is less. It should be noted that the above included angle is the included angle formed by the first needle 31 , the second needle 32 and the third needle 33 on the first plane.

In some embodiments, the second recess 112, the escape recess 118 and the first recess 111 are located on one side of the external fixator 2 in the direction of encircling, the third recess 113 is located on the other side of the external fixator 2 in the encircling direction, and the second The recess 112 or the escape recess 118 communicates with the first recess 111 . As shown in FIG. 2 , the second recess 112 , the avoidance recess 118 and the first recess 111 are located on the upper side of the external fixator 2 in the circumferential direction, and the third recess 113 is located on the lower side of the external fixator 2 in the circumferential direction.

Since the second recess 112, the avoidance recess 118 and the first recess 111 are located on one side of the external fixator 2 in the encircling direction, one of the second recess 112 and the avoidance recess 118 is communicated with the first recess 111 to simplify It is difficult to make and saves materials.

In one embodiment, the connection structure 12 and the first concave portion 111 are located on one side of the external fixator 2 in the circumferential direction.

In some embodiments, the connection structure 12 includes a first arm 121 and a second arm 122 arranged along the bending direction, and one end of the first arm 121 and one end of the second arm 122 are connected to the curved guide plate 11 respectively. The other end of the first arm 121 and the other end of the second arm 122 are respectively connected to the external fixator 2 through the mounting holes 21 .

In one embodiment, the other end of the first support arm 121 and the other end of the second support arm 122 are respectively provided with installation fitting holes 123, and the connection between the installation fitting holes 123 and the installation holes 21 on the external fixation frame 2 is through bolts and nuts. to connect.

The connection structure 12 is configured to include a first arm 121 and a second arm 122 to fix the curved guide plate 11 on the external fixator 2 for more stability.

In some embodiments, the thickness of the curved guide plate 11 is 2 mm˜6 mm, and the length of the curved guide plate 11 along the extending direction X is 50 mm˜120 mm.

Such a setting can meet the needs of different groups of people, and will not waste too much material.

In some embodiments, the length of the first recess 111 , the second recess 112 and the third recess 113 along the extending direction X is 2.5 mm˜5 mm.

Such setting can meet the needs of different groups of people, and will not waste materials.

Fig. 4 is a schematic structural diagram of another external fixator assembly and a target site according to an embodiment of the present application.

Referring to FIG. 4 , the embodiment of the present application also provides an external fixator assembly 6 , including an external fixator 2 , a needle 3 and the aforementioned guide 1 .

In some embodiments, the external fixator assembly 6 also includes a plurality of guide sleeves 5 adapted to the needle 3, the guide sleeves 5 are fixed in the mounting holes 21, one end of the guide sleeve 5 is used to insert the needle 3, and the other end abuts against the needle 3. On the concave surface of the first concave portion 111 , the second concave portion 112 or the third concave portion 113 . Wherein, the inside of the guide sleeve 5 is provided with a channel adapted to the needle 3 , and the diameter of the channel is larger than the outer diameter of the needle 3 .

Taking the first recess 111 as an illustration, according to the preoperative planning, the guide sleeve 5 is fixed to one of the two first mounting holes corresponding to the first recess 111, and one end of the guide sleeve 5 is abutted against the first recess 111. On the concave surface, when the needle 3 is screwed in, the needle 3 enters the first recess 111 after passing through the guide sleeve 5 . The guide sleeve 5 can be used repeatedly on the second recess 112 and the third recess 113, and a plurality of guide sleeves 5 can also be provided, corresponding to the first recess 111, the second recess 112 or the third recess 113, and installed at the same time. The application is not overly limited here.

By setting the guide sleeve 5, the doctor can realize the positioning of the needle 3 by screwing the needle 3 into the guide sleeve 5, which is convenient for operation. Specifically, when the guide sleeve 5 is not used, the doctor needs to hold one end of the needle 3 to screw the needle 3 into the first recess 111 through the positional relationship between the first installation hole 21 and the first recess 111, because the needle 3 It is always in a rotating state, so it is dangerous to hold it by hand, and it is easy to get the gloves involved, but it is almost unnecessary to hold it by hand when the needle 3 is screwed in through the guide sleeve 5, which greatly reduces the risk and improves the safety factor of the operation.

In one embodiment, one of the first concave portion 111, the second concave portion 112 and the third concave portion 113 is located on one side of the external fixator 2 in the circumferential direction, and the remaining two are located on the other side of the external fixator 2 in the circumferential direction. side. Such arrangement can improve the structural stability between the needle 3 , the target part 4 and the external fixator 2 .

While the present application has been described with reference to a preferred embodiment, various modifications may be made thereto and equivalents may be substituted for parts thereof without departing from the scope of the present application, in particular, as long as there are no structural conflicts , the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (10)

1. The utility model provides a guide that is used for external fixation frame to wear needle, the external fixation frame encloses the periphery of establishing at the target site to including a plurality of mounting holes of establishing the direction range along it, the needle can pass the target site is fixed in between two mounting holes, its characterized in that, the guide includes:

the curved guide plate is attached to the surface of the target part and is provided with a first concave part, a second concave part and a third concave part, the curved guide plate comprises a first end and a second end in the bending direction and a third end and a fourth end opposite to each other in the extending direction, the first end is inwards recessed to form at least one of the first concave part, the second concave part and the third concave part, the second end is inwards recessed to form the rest parts of the first concave part, the second concave part and the third concave part, the distances from the first concave part, the second concave part and the third concave part to a first plane are sequentially reduced, the first plane is perpendicular to the extending direction and is located on one side, away from the third end, of the fourth end, of the first concave part, the second concave part and the third concave part are used for achieving positioning of the needle;

and the connecting structure is connected between the curved guide plate and the outer fixing frame so that the curved guide plate is fixed in the surrounding space of the outer fixing frame.

2. The guide for external mount needle threading of claim 1, wherein one of the first recess, the second recess, and the third recess is disposed at the first end and the other two are disposed at the second end.

3. The guide for an external mount needle threading of claim 1, wherein said curved guide further comprises at least one relief recess in one-to-one correspondence with one or two of said first recess, said second recess, and said third recess to allow said needle to pass through said curved guide.

4. The guide for external fixator threading needle of claim 3, wherein the number of the avoiding concave part is one, and the avoiding concave part corresponds to the second concave part;

the first recess and one of the second recess and the avoidance recess are located at the first end, and the third recess and the other of the second recess and the avoidance recess are located at the second end.

5. The guide for threading the needle through the external fixing frame according to claim 4, wherein the second recess, the avoiding recess and the first recess are located on one side of the external fixing frame in the circumferential direction, the third recess is located on the other side of the external fixing frame in the circumferential direction, and the second recess or the avoiding recess is communicated with the first recess.

6. The guide member for threading a needle through an external fixation frame according to claim 1, wherein the connecting structure comprises a first arm and a second arm arranged along the bending direction, one end of the first arm and one end of the second arm are respectively connected with the curved guide plate, and the other end of the first arm and the other end of the second arm are respectively connected with the external fixation frame through the mounting hole.

7. The guide for a needle of an external fixing frame according to claim 1, wherein the thickness of the curved guide plate is 2mm to 6mm, and the length of the curved guide plate along the extending direction is 50mm to 120mm.

8. The guide for external fixator threading of claim 1, wherein the first, second and third recesses have a length in the extension direction of 2.5mm to 5mm.

9. An external mount assembly comprising the guide of any of claims 1-8, an external mount and a needle.

10. The external mounting bracket assembly of claim 9 further comprising a plurality of guide sleeves adapted to the needles, the guide sleeves being secured to the mounting holes, one end of the guide sleeves being adapted to receive a needle and the other end abutting the recessed surface.

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