Positioning and guiding device for ulna coracoid process fracture

Abstract

The invention provides an ulna coracoid process fracture positioning and guiding device which comprises a clamping component and a guiding component, the clamping component and the guiding component are connected through a guiding rod, the clamping component comprises a clamping jaw and a first connecting rod, and the clamping jaw is formed at the end, away from the guiding rod, of the first connecting rod; the guiding component comprises a guiding device and a second connecting rod, the guiding device is formed at the end, away from the guiding rod, of the second connecting rod, a plurality of first guiding holes evenly penetrate through the guiding device in the axial direction, a plurality of second guiding holes evenly penetrate through the guiding device around the outer sides of the first guiding holes, and the diameter of the first guiding holes is smaller than that of the second guiding holes; the guide rod is perpendicular to the length direction of the first connecting rod and the second connecting rod. The device is used for solving the problems that in the prior art, small bone blocks are difficult to clamp and position during coronal process fracture, and the small bone blocks at the coronal process fracture are difficult to fix by a thin kirschner wire at an accurate angle.

Description

Technical Field

[0001] The present invention relates to the field of orthopedic medical devices, and particularly to a positioning and guiding device for ulnar coronoid process fractures. Background Art

[0002] The terrible triad injury of the elbow joint is a complex elbow fracture dislocation caused by longitudinal compression and shear violence applied in the extension position of the upper limb, belonging to severe high-energy trauma of the elbow. When the terrible triad injury of the elbow joint occurs, its clinical manifestations are elbow joint dislocation accompanied by fractures of the radial head and coronoid process, and injuries of the lateral collateral ligament, medial collateral ligament, and anterior joint capsule of the elbow joint.

[0003] Currently, conservative treatment is usually adopted for the terrible triad. However, due to the instability of the bony structures (coronoid process fracture, radial head fracture), and the easy dislocation caused by the tearing of the medial and lateral collateral ligaments and the anterior joint capsule, it is difficult to maintain the stability of the elbow joint, and there is a risk of redislocation. If surgical treatment is adopted, it is necessary to first fix the coronoid process fracture or repair the anterior joint capsule to restore the stability of the coronoid process. During the operation, fine Kirschner wires are used to fix the smaller bone fragments of the coronoid process fracture, and fixation wires are used to repair the joint capsule and fix it to the posterior side of the proximal ulna.

[0004] Since the bone fragments of the coronoid process fracture are small and carry joint capsule tissue, it is difficult to hold and fix them to the fracture end of the coronoid process. In the prior art, during the operation, it is necessary to use fingers to clamp and stabilize them, and find the position of the bone fragments by touching with fingers, and then drive the fine Kirschner wire from the back to the front (see Figure 1 shown). During the above operation process, it is necessary to occupy one hand of the doctor to clamp and touch and sense the bone fragments, resulting in the doctor having to drive the fine Kirschner wire and repair the joint capsule with only one hand, causing problems that the surgical accuracy is difficult to guarantee and the surgical difficulty is relatively large.

[0005] In view of this, it is necessary to improve the above prior art to solve the above problems. It should be noted that the introduction of the background art above is only for the convenience of clearly and completely explaining the technical solutions of the present application and facilitating the understanding of those skilled in the art. It cannot be considered that the above technical solutions are well-known to those skilled in the art just because these solutions are described in the background art part of the present application. Summary of the Invention

[0006] The purpose of the present invention is to disclose a positioning and guiding device for ulnar coronoid process fractures, so as to solve the problems in the prior art that when a coronoid process fracture occurs in the terrible triad injury of the elbow joint, it is difficult to clamp and position the small bone fragments, and it is difficult for the fine Kirschner wire to fix the small bone fragments at the coronoid process fracture site at an accurate angle, resulting in difficult-to-guarantee surgical accuracy and relatively large surgical difficulty.

[0007] To achieve the above object, the present invention provides a positioning and guiding device for ulnar coronoid process fractures, comprising: a clamping member and a guiding member, wherein the clamping member is connected to the guiding member by a guiding rod, the clamping member includes a clamping jaw and a first connecting rod, and the clamping jaw is formed at one end of the first connecting rod away from the guiding rod;

[0008] The guiding member includes a guiding device and a second connecting rod, the guiding device is formed at one end of the second connecting rod away from the guiding rod, the guiding device is uniformly provided with a plurality of first guiding holes along the axial direction, and a plurality of second guiding holes are uniformly provided around the outside of the first guiding holes, and the aperture of the first guiding hole is smaller than the aperture of the second guiding hole;

[0009] The guiding rod is arranged perpendicular to the length directions of the first connecting rod and the second connecting rod, the first connecting rod is detachably connected to the guiding rod, and the second connecting rod is slidably matched with the guiding rod and clamped and fixed by a positioning member.

[0010] As a further improvement of the present invention, the clamping jaw has a mounting seat and five supporting fingers, the mounting seat is fixedly connected to the first connecting rod, and the five supporting fingers are radially assembled on one side of the mounting seat close to the guiding device;

[0011] The supporting finger includes a first supporting portion and a second supporting portion, one end of the first supporting portion is connected to the mounting seat, and the other end extends towards the guiding device and away from the mounting seat, the top end of the second supporting portion is connected to the first supporting portion, and the other end extends towards the guiding device and close to the mounting seat, and the length of the second supporting portion is less than the length of the first supporting portion.

[0012] As a further improvement of the present invention, the five supporting fingers are divided into three front area finger groups and two rear area finger groups, the first supporting finger arranged in the middle of the three front area finger groups is inclined towards the direction away from the guiding rod, and the line segment formed by the vertical projection of the first supporting finger is arranged along the same length direction as the first connecting rod;

[0013] The other two second supporting fingers of the three front area finger groups are evenly distributed on the left and right sides of the first supporting finger, and the line segments formed by the vertical projections of the two second supporting fingers form acute angles with the same angle with the length direction of the first connecting rod;

[0014] The line segments formed by the vertical projections of the two third supporting fingers of the two rear area finger groups form an angle greater than 60° with the line segments formed by the vertical projections of the adjacent second supporting fingers.

[0015] As a further improvement of the present invention, a guiding hole is formed in the guiding rod along the height direction, a guiding member is formed at one end of the second connecting rod away from the guiding device, and the guiding member passes through the guiding hole and displaces along the height direction of the guiding hole;

[0016] One end of the guiding member passing out of the guiding hole forms a threaded section, and the positioning member is selected and matched with a first nut that is threadedly engaged with the threaded section.

[0017] As a further improvement of the present invention, the guiding device is arranged as a cylindrical member with a diameter larger than the width of the second connecting rod.

[0018] As a further improvement of the present invention, the aperture range of the first guiding hole is 0.75 - 1 mm, and the aperture range of the second guiding hole is 2.5 - 3 mm.

[0019] As a further improvement of the present invention, it further includes: a supporting device, the supporting device includes a first supporting rod arranged parallel to the first connecting rod and a second supporting rod arranged perpendicular to the first supporting rod, the first supporting rod is detachably connected to the guiding rod, and the top end of the second supporting rod abuts against the lower surface of the first connecting rod.

[0020] As a further improvement of the present invention, a supporting plate is fixedly connected to the top end of the second supporting rod, and the top surface of the supporting plate is attached to the lower surface of the first supporting rod.

[0021] As a further improvement of the present invention, the guiding rod is arranged with a guiding surface that fits with the first connecting rod and the second connecting rod on one side close to the first connecting rod and the second connecting rod.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: A positioning and guiding device for ulnar coronoid process fractures composed of a clamping member and a guiding member. Among them, the clamping member includes a claw and a first connecting rod. The small-sized bone block existing at the ulnar coronoid process is clamped and initially fixed by the claw, and then the guiding member is moved along the length direction of the guiding rod so that the guiding device it has abuts against the posterior side of the proximal ulna. A thin Kirschner wire is driven into the coronoid process through the first guiding hole opened by the guiding device, and a number of densely arranged first guiding holes simultaneously guide a thin Kirschner wire to fix the small-sized bone block. Then, a fixation wire is guided through the second guiding hole opened by the guiding device to repair the joint capsule. In the above process, first, the clamping member plays a role in clamping and positioning the small bone block, effectively improving the simplicity of fixing the small bone block compared with manually fixing the bone block in the prior art. Then, the guiding member abuts against the posterior side of the proximal ulna, and the guiding function for the thin Kirschner wire and the fixation wire is realized through the guiding device it has, thereby effectively improving the surgical accuracy and effectively reducing the surgical difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1Schematic diagram of the specific structure of the elbow joint and the state of the thin Kirschner wire being inserted;

[0024] Figure 2 Schematic diagram of the structure of the positioning and guiding device for the coronoid process fracture in the present invention;

[0025] Figure 3 For Figure 2 Schematic cross-sectional view along the F-F direction in

[0026] Figure 4 Top view of the present invention;

[0027] Figure 5 For Figure 2 Enlarged view of part A in

[0028] Figure 6 For Figure 3 Enlarged view of part B in Detailed implementation mode

[0029] The present invention will be described in detail below in conjunction with the various implementation modes shown in the drawings. However, it should be noted that these implementation modes are not limitations on the present invention. Any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these implementation modes shall fall within the protection scope of the present invention.

[0030] Refer Figures 2 to 6 As shown, a positioning and guiding device for ulnar coronoid process fracture disclosed by the present invention, compared with the prior art, is composed of a clamping member 1 and a guiding member 2. Among them, the clamping member 1 includes a clamping jaw 11 and a first connecting rod 12. The small-sized bone block existing at the coronoid process 1031 of the ulna 103 (refer Figure 1 As shown) is clamped and preliminarily fixed, and then the guiding member 2 is moved along the length direction of the guiding rod 3 so that the guiding device 21 thereof abuts against the rear side of the proximal end of the ulna 103 (the specific position refers to Figure 1The position where the shown thin Kirschner wire 107 penetrates into the ulna 103). The thin Kirschner wire 107 is driven into the coronoid process 1031 through the first guiding hole 211 opened in the guiding device 21. A number of densely arranged first guiding holes 211 guide a thin Kirschner wire 107 at the same time to fix a small-sized bone block (not shown). Then, the fixing wire is guided through the second guiding hole 212 opened in the guiding device 21 to repair the joint capsule (not shown). In the above process, first, the clamping member 2 plays a role in clamping and positioning the small bone block. Compared with manually fixing the bone block in the prior art, the simplicity of fixing the small bone block is effectively improved. The clamping jaws 11 are arranged in a posture close to that of a human hand to achieve the purpose of flexibly clamping the small bone block instead of the hand. Then, the guiding member 2 abuts against the proximal posterior side of the ulna 103, and the guiding device 21 it has realizes the guiding function for the thin Kirschner wire 107 and the fixing wire (not shown), thereby effectively improving the surgical accuracy and effectively reducing the surgical difficulty.

[0031] Refer Figures 2 to 6 As shown, in this embodiment, the positioning and guiding device for ulnar coronoid process fracture (hereinafter referred to as the positioning and guiding device) includes: a clamping member 1 and a guiding member 2. The clamping member 1 and the guiding member are connected by a guiding rod. The clamping member 1 includes clamping jaws 11 and a first connecting rod 12. The clamping jaws 11 are formed at one end of the first connecting rod 12 far from the guiding rod 3. The guiding member 21 includes a guiding device and a second connecting rod 22. The guiding device 21 is formed at one end of the second connecting rod 22 far from the guiding rod 3. The guiding device 21 is uniformly provided with a number of first guiding holes 211 axially penetrating therethrough. The guiding device 21 is uniformly provided with a number of second guiding holes 212 around the outside of the first guiding holes 211. The aperture of the first guiding hole 211 is smaller than the aperture of the second guiding hole 212. The guiding rod 3 is arranged perpendicular to the length directions of the first connecting rod 12 and the second connecting rod 22. The first connecting rod 12 is detachably connected to the guiding rod 3. The second connecting rod 22 is slidably matched with the guiding rod 3 and is clamped and fixed by a positioning member 32.

[0032] Specifically, please refer Figure 1 As shown, it is a schematic structural diagram of the elbow joint 10. When the elbow joint 10 has a fracture including the terrible triad, the specific symptoms include a fracture of the radial head 102 (i.e., the part close to the coronoid process 1031 shown in the figure), a fracture 1031 of the ulnar coronoid process 103, and local joint dislocation. Further, along with the terrible triad fracture, injuries to the lateral collateral ligament, the medial collateral ligament (denoted by reference numeral 104 in the figure), and the anterior joint capsule 1032 of the elbow joint (hereinafter simply referred to as the anterior joint capsule 1032, which is located inside the coronoid process 1031) will also occur. It should be noted that when the coronoid process 1031 has a fracture, there are several small bone blocks with attached anterior joint capsule 1032 tissues, which need to be Figure 1At the posture shown, multiple thin Kirschner wires 107 are driven from the back to the front at the coronoid process 1031 to achieve the effect of fixing small bone fragments. Further, when a small bone fragment exists during the fracture of the coronoid process 1031, its position needs to be determined by touch. Then, the coronoid process 1031 is manually held continuously to locate the small bone fragment. Then, under the cooperation of X-ray, several thin Kirschner wires 107 are driven in to fix the small bone fragment at the coronoid process 1031 to achieve the purpose of repairing the coronoid process 1031. Since the operation of manually holding the coronoid process 1031 and then driving in the thin Kirschner wire 107 is difficult: holding the fractured part of the coronoid process 1031 with one hand and driving in the thin Kirschner wire 107 without guidance, first, the action of holding the coronoid process 1031 to locate the small bone fragment itself is quite difficult, requiring the hand to maintain the positioning action and the initial position until the positioning of the thin Kirschner wire 107 is completed. Second, when one hand is occupied in positioning the coronoid process 1031, there is a problem of difficultly controlling the direction of the thin Kirschner wire 107 when driving it in without guidance, that is, it is difficult to avoid the error in the direction of the thin Kirschner wire 107 during driving, which may lead to the problem that the small bone fragment cannot be fixed. In this embodiment, through the design of the clamping member 1 and the guiding member 2, the problems existing in the fixation process of the coronoid process fracture in the prior art are effectively avoided.

[0033] In this embodiment, the positioning and guiding device is composed of three parts: a clamping member 1, a guiding member 2, and a guiding rod 3. When it is necessary to clamp and position the fractured coronoid process 1031, manually touch to confirm the position of the small bone fragment existing at the coronoid process 1031. Then, the clamping jaws of the clamping member 1 are attached to the position where the confirmed small bone fragment is located to achieve the purpose of clamping and positioning the small bone fragment at the coronoid process 1031. Then, the guiding member 2 that is slidably matched with the guiding rod 3 is slid along the guiding rod 3 until the guiding device 21 abuts against the position where the Kirschner wire 107 is driven into the coronoid process 1031 (this position can also be the proximal posterior side of the ulna 103. During the operation, the skin and soft tissues are incised through the incision so that the guiding device 21 can abut against the proximal posterior side of the ulna 103). Then, several thin Kirschner wires 107 are driven into the ulna 103 after passing through several first guiding holes 211 of the guiding device 21 away from the ulna 103, and finally, the small bone fragment clamped and positioned by the clamping jaws 11 at the coronoid process 1031 is fixed to achieve the purpose of fixing the small bone fragment at the coronoid process 1031. Then, a fixing wire (not shown) is driven into the ulna 103 through several second guiding holes 212 arranged around the first guiding holes 211, and the anterior joint capsule 1032 is repaired through the fixing wire. Through the above design in this embodiment, through the clamping member 1 composed of the clamping jaws 11 and the first connecting rod 12, the small bone fragment with joint capsule tissue at the coronoid process 1031 can be effectively clamped and positioned instead of the human hand.

[0034] Furthermore, by abutting the guiding member 21 against the posterior side of the proximal end of the ulna 103, while guiding the thin Kirschner wire 107, the clamping jaws 11 are used to clamp both sides of the coronoid process 103 simultaneously, further improving the clamping and positioning stability of the small bone fragment. Moreover, the thin Kirschner wire 107 is guided by the first guiding hole 211 to be driven into the posterior side of the proximal end of the ulna 103 to achieve the effect of fixing the small bone fragment, so as to ensure that the thin Kirschner wire 107 can accurately penetrate into the target position to fix the small bone fragment at the coronoid process 103. Finally, the second guiding hole 212 formed around the first guiding hole 211 is used to guide the fixation wire to repair the anterior joint capsule 1032. As can be seen from the above, the guiding device 21 not only plays the role of guiding the direction of the thin Kirschner wire 107, but also cooperates with the clamping jaws 11 to clamp and position the small bone fragment at the coronoid process 103 and guide the fixation wire to repair the anterior joint capsule 1032, effectively improving the repair effect of the coronoid process fracture and effectively reducing the repair difficulty of the coronoid process 12. In this embodiment, the aperture range of the first guiding hole 211 is 0.75 - 1 mm, and the aperture range of the second guiding hole 212 is 2.5 - 3 mm. Specifically, the aperture of the first guiding hole can be 0.75 mm or 1 mm, and the aperture of the second guiding hole 212 is 2.5 mm or 3 mm, so that the thin Kirschner wire 107 and the fixation wire with appropriate thickness can pass through. The specific aperture can be selected according to the actual needs of the operation.

[0035] See Figures 2 to 5As shown, the jaw 11 has a mounting base 111 and five supporting fingers 112. The mounting base 111 is fixedly connected to the first connecting rod 12, and the five supporting fingers 112 are radially assembled on the side of the mounting base 111 close to the guiding device 21; the supporting finger 112 includes a first supporting portion 1121 and a second supporting portion 1122. One end of the first supporting portion 1121 is connected to the mounting base 111, and the other end extends in the direction close to the guiding device 21 and away from the mounting base 111. The top end of the second supporting portion 1122 is connected to the first supporting portion 1121, and the other end extends in the direction close to the guiding device 21 and close to the mounting base 111. The length of the second supporting portion 1122 is less than the length of the first supporting portion 1121. Further, the five supporting fingers 112 are divided into three front-region finger groups 1123 and two rear-region finger groups 1124. The first supporting finger 1123a arranged in the middle of the three front-region finger groups 1123 is inclined in the direction away from the guiding rod 3, and the line segment formed by the vertical projection of the first supporting finger 1123a is arranged along the same length direction as the first connecting rod 11; the other two second supporting fingers 1123b of the three front-region finger groups 1123 are evenly distributed on the left and right sides of the first supporting finger 1123a, and the line segments formed by the vertical projections of the two second supporting fingers 1123b form acute angles with the same angle with the length direction of the first connecting rod 111; the line segments formed by the vertical projections of the two third supporting fingers 11241 of the two rear-region finger groups 1124 form an angle greater than 60° with the line segments formed by the vertical projections of the adjacent second supporting fingers 1123b.

[0036] First, in this embodiment, the jaw 11 is composed of five supporting fingers 112, and each supporting finger 112 includes a first supporting portion 1121 and a second supporting portion 1122, and as Figure 2 and Figure 5As shown, the first supporting portion 1121 is also composed of a first part with a larger inclination and a second part (not labeled) with a smaller inclination. The bottom end of the second part is connected to the second supporting portion 1122, so that each supporting finger 112 forms three joints similar to those of a finger, thereby achieving a clamping effect close to that of a human hand. Secondly, the five supporting fingers 11 are divided into a three-finger front-region finger group 1123 and a two-finger rear-region finger group 1124. By setting the directions of the first supporting finger 1123a, the second supporting finger 1123b, and the third supporting finger 11241, as well as the angles presented between two adjacent fingers, the overall structure of the jaw 11 is arranged in a posture closer to that of a human hand. That is, the first supporting finger 1123a is close to the middle finger, the two second supporting fingers 1123b are close to the index finger and the ring finger, and the two third supporting fingers 11241 are close to the thumb and the little finger. Through the above settings, the supporting finger 112 composed of the first supporting portion 1121 and the second supporting portion 1122 is close to the posture of a finger during the supporting action, and the five supporting fingers 112 are divided into a three-finger front-region finger group 1123 and a two-finger rear-region finger group 1124, so that the overall structure of the jaw 11 is closer to the posture of a human hand during the clamping and supporting actions. Furthermore, the purpose of clamping the small bone mass at the coronoid process 1031 with an action close to that of a human hand through the jaw 11 is achieved, so as to replace the human hand to clamp the small bone mass.

[0037] Refer Figure 2 and Figure 3 As shown, a guide hole 31 is opened in the guide rod 3 in the height direction. A guide member 221 is formed at one end of the second link 22 away from the guiding device 21. The guide member 221 passes through the guide hole 31 and displaces along the height direction of the guide hole 31. One end of the guide member 221 passing out of the guide hole 31 forms a threaded section (not shown). The positioning member 32 is selected as a first nut that is threadedly (not shown) engaged with the threaded section. The guiding device 21 is arranged as a cylindrical member with a diameter larger than the width of the second link 22. Through the above design, after the jaw 11 abuts against the position of the coronoid process 1031 close to the anterior joint capsule 1032, a force is applied to the second link 22 to make the guide member 221 move upward (i.e., toward the direction close to the first link 12) in the guide hole 33 until the guide member 21 abuts against the proximal posterior side of the ulna 103. During the lifting and lowering process of the second link 22, the positioning member 32 can be in a state of being disengaged from the threaded section of the guide member 221, or can be in a state of still being connected to the threaded section but not abutting against the guide rod 3, as long as the free lifting and lowering of the second link 22 can be achieved. After the guiding device 21 abuts against the proximal posterior side of the ulna 103, the positioning member 32 is tightened until it abuts against the guide rod 3 to maintain the fitting state of the guiding device 21 and the ulna 103, so as to guide the thin Kirschner wire 107 and the fixation wire in the subsequent process.

[0038] Refer Figure 1 andFigure 2 As shown, the positioning and guiding device further includes: a support device 4. The support device 4 includes a first support rod 41 arranged parallel to the first connecting rod 12 and a second support rod 42 arranged perpendicular to the first support rod 41. The first support rod 41 is detachably connected to the guiding rod 3, and the top end of the second support rod 4 abuts against the lower surface of the first connecting rod 12. A support plate 43 is fixedly connected to the top end of the second support rod 4, and the top surface of the support plate 43 fits against the lower surface of the first support rod 12. The guiding rod 3 is provided with a guiding surface (not labeled) that fits against the first connecting rod 12 and the second connecting rod 22 on the side close to the first connecting rod 12 and the second connecting rod 22. In order to enable the gripper 11 to have a better supporting and clamping effect, it is necessary to keep its posture parallel to the axis of the guiding device 21. To avoid the problem that the first connecting rod 12 sags due to the large gravity of the gripper 11 at the end far from the guiding rod 3, in this embodiment, the support device is provided to effectively support the first connecting rod 12, that is, the support plate 42 formed at the top end of the second support rod 42 supports the position of the lower surface of the first connecting rod 12 between the guiding rod 3 and the gripper 11, so as to keep the first connecting rod 13 arranged perpendicular to the guiding rod 3, and further ensure the clamping state of the gripper 11 at the coronoid process 1031. Further, two mounting holes (not labeled) are provided above the guiding hole 31 of the guiding rod 3. The first connecting rod 11 and the first support rod 41 respectively pass through the two mounting holes through a mounting member (not labeled), and are then tightened by a second nut respectively to be fixed to the guiding rod 3. It should be noted that in this embodiment, the guiding rod 3 is formed as a rectangular parallelepiped rod-shaped member, so both the first connecting rod 12 and the second connecting rod 22 are vertical planes on the side that fits against it.

[0039] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent embodiments or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

[0040] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0041] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A positioning and guiding device for ulnar coronoid process fractures, characterized in that, Comprising: A clamping member and a guiding member, the clamping member and the guiding member are connected by a guiding rod, the clamping member includes a clamping jaw and a first connecting rod, and the clamping jaw is formed at one end of the first connecting rod away from the guiding rod; The guiding member includes a guiding device and a second connecting rod, the guiding device is formed at one end of the second connecting rod away from the guiding rod, the guiding device is uniformly provided with a plurality of first guiding holes axially penetrating therethrough, and a plurality of second guiding holes are uniformly penetratingly arranged outside the first guiding holes around the first guiding holes, and the aperture of the first guiding hole is smaller than the aperture of the second guiding hole; The guiding rod is arranged perpendicular to the length directions of the first connecting rod and the second connecting rod, the first connecting rod is detachably connected to the guiding rod, and the second connecting rod is slidably matched with the guiding rod and is clamped and fixed by a positioning member.

2. The positioning and guiding device for ulnar coronoid process fractures according to claim 1, characterized in that, The clamping jaw has a mounting seat and five supporting fingers, the mounting seat is fixedly connected to the first connecting rod, and the five supporting fingers are radially assembled on one side of the mounting seat close to the guiding device; The supporting finger includes a first supporting portion and a second supporting portion, one end of the first supporting portion is connected to the mounting seat, and the other end extends in a direction close to the guiding device and away from the mounting seat, the top end of the second supporting portion is connected to the first supporting portion, and the other end extends in a direction close to the guiding device and close to the mounting seat, and the length of the second supporting portion is less than the length of the first supporting portion.

3. The positioning and guiding device for ulnar coronoid process fractures according to claim 2, characterized in that, The five supporting fingers are divided into three front area finger groups and two rear area finger groups. The first supporting finger arranged in the middle of the three front area finger groups is inclined in a direction away from the guiding rod, and the line segment formed by the vertical projection of the first supporting finger is arranged along the same length direction as the first connecting rod; The other two second supporting fingers of the three front area finger groups are evenly distributed on the left and right sides of the first supporting finger, and the line segments formed by the vertical projections of the two second supporting fingers form acute angles with the same angle with the length direction of the first connecting rod; The line segments formed by the vertical projections of the two third supporting fingers of the two rear area finger groups form an angle greater than 60° with the line segments formed by the vertical projections of the adjacent second supporting fingers.

4. The positioning and guiding device for ulnar coronoid process fractures according to claim 1, wherein, The guiding rod is provided with a guiding hole in the height direction, a guiding member is formed at one end of the second connecting rod away from the guiding device, and the guiding member passes through the guiding hole and displaces along the height direction of the guiding hole; One end of the guiding member passing out of the guiding hole forms a threaded section, and the positioning member is selected as a first nut threadedly matched with the threaded section.

5. The positioning and guiding device for ulnar coronoid process fractures according to claim 4, characterized in that, The guiding device is arranged as a cylindrical member with a diameter larger than the width of the second connecting rod.

6. The positioning and guiding device for ulnar coronoid process fractures according to claim 5, wherein, The aperture range of the first guiding hole is 0.75 - 1 mm, and the aperture range of the second guiding hole is 2.5 - 3 mm.

7. The positioning and guiding device for ulnar coronoid process fractures according to claim 1, characterized in that, Further comprising: A supporting device, the supporting device includes a first support rod arranged parallel to the first connecting rod and a second support rod arranged perpendicular to the first support rod, the first support rod is detachably connected to the guiding rod, and the top end of the second support rod abuts against the lower surface of the first connecting rod.

8. The positioning and guiding device for ulnar coronoid process fractures according to claim 7, characterized in that, A supporting plate is fixedly connected to the top end of the second support rod, and the top surface of the supporting plate is attached to the lower surface of the first support rod.

9. The positioning and guiding device for ulnar coronoid process fractures according to claim 7, characterized in that, The guide rod is arranged on the side close to the first connecting rod and the second connecting rod and is provided with a guide surface that fits with the first connecting rod and the second connecting rod.

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