CN213075873U - Ulna coronal process fracture fixing device - Google Patents

Abstract

The utility model relates to an ulna coronal process fracture fixation device, which comprises a plate body which is in accordance with the ulna coronal process surface dissection radian, wherein two first locking holes which are arranged side by side are arranged on the near end of the plate body which is close to the ulna coronal process, each first locking hole is used for accommodating one locking nail, and the fixed direction angle of the locking nail in the first locking hole is approximately parallel to the elbow joint; the plate body is further provided with two second locking holes which are arranged side by side at the far end away from the ulna coronal process, each second locking hole is used for accommodating one locking nail, and the fixed direction angle of the locking nail in each second locking hole inclines to an included angle of 15-45 degrees towards the elbow joint direction so as to solve some problems of the existing coronal process fracture fixing device.

Description

Ulna coronal process fracture fixing device

Technical Field

The utility model relates to the field of medical equipment, specifically relate to an ulna coronarium fracture fixing device.

Background

The ulna coronary process fracture is a common elbow injury, accounts for 10% -15% of elbow joint injuries, and is often combined with elbow joint dislocation, radius capitulum fracture and the like. The injury mechanism is mainly that the hand touches the ground when the elbow joint is fallen down, when the elbow joint is bent less than 20 degrees, the axial load is transmitted to the elbow joint through the forearm, the ulna coronal process collides with the humerus pulley, and the coronal process bears larger shear stress to cause fracture.

At present, the surgical approach and the fixing method are not uniform, and the common surgical approach comprises an inner approach, an outer approach, a posterior medial approach and the like. The traditional medial approach has the obstruction of the gyro-flexor group, so that the exposure of the coronary process is difficult, the coronary process needs to be exposed through the 'overhead' approach, the tissue trauma is larger, and the risk of ulnar nerve paralysis is increased. The external elbow approach is suitable for patients with ulna and coronary fracture complicated with fracture of radius head or radius neck, and need internal fixation or resection of radius head and removal of coronary bone fragment. The external approach of the elbow is not suitable for the reduction and internal fixation of simple coronary fracture. The proximal end of the ulna can be fixed at the same time by the posterior medial approach, and the treatment of Regan-Morrey III type coronary fracture is more convenient; the fracture fixation of the type I and the type II is difficult, the ulnar nerve needs to be exposed, the soft tissue wound is large, and the reduction and fixation of the outer bone block are difficult.

The coronary process fracture belongs to the intra-articular fracture, and the fracture healing is difficult because the inside of the joint is soaked by synovial fluid. In addition, because the fracture block is small, the commonly used fixing method comprises a kirschner wire, a hollow compression screw, a micro steel plate and the like. The crura bone coronarism fracture is fixed by the kirschner wire, the fixation is not firm, the compression effect is not generated, the delayed union or the nonunion of the fracture is easy to cause, the early functional exercise can not be performed after the operation, the functional recovery of the elbow joint is influenced, and the satisfactory effect can not be achieved; the bone fracture plate is fixed by a pure hollow compression screw, the diameter of the screw is thick, fracture fragments are easy to break when compression is carried out, the shape of a fracture block is irregular, accurate compression fixation is often difficult to realize, the tail part of the screw is large, and bone can not be embedded, so that joint movement is easily influenced. The miniature steel plate is not specially designed for the fracture of the ulna coronoid process part, has poor fitting effect with the coronoid process and is difficult to bend and mold; and the locking direction of the fixing screw is not ideal enough, and the fixing screw is easy to penetrate into the joint surface to influence the elbow joint movement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an ulna coronaries breaks fixing device to solve some problems that current coronaries breaks fixing device exists.

The specific scheme is as follows:

an ulna coronal process fracture fixing device comprises a plate body which conforms to the anatomical radian of an ulna coronal process bone surface, wherein two first locking holes which are arranged side by side are formed in the near end, close to the ulna coronal process, of the plate body, each first locking hole is used for receiving one locking nail, and the fixed direction angle of each locking nail in each first locking hole is approximately parallel to an elbow joint; the plate body is further provided with two second locking holes which are arranged side by side at the far end away from the ulna coronal process, each second locking hole is used for accommodating one locking nail, and the fixed direction angle of the locking nail in each second locking hole inclines to an included angle of 15-45 degrees towards the elbow joint direction.

Preferably, the two first locking holes and the two second locking holes on the plate body are arranged in a substantially rectangular shape.

Preferably, the plate body has a first hollow portion in an area surrounded by the two first locking holes and the two second locking holes.

Preferably, the bottom surface of the plate body, which is fit for the ulna coronal apophysis surface, is also provided with a plurality of sharp teeth.

Preferably, the proximal end of the plate body further has a support portion extending in the direction of the ulnar coronal process, the support portion having an anatomical curvature conforming to the ulnar coronal process.

Preferably, the support portion has a second hollow portion.

Preferably, the first locking hole and the second locking hole are internally provided with internal threads matched with the locking nail.

The utility model provides an ulna coronaries breaks fixing device compares with prior art and has following advantage: the utility model provides an ulna coronarium fracture fixing device can form stable support fixed effect to the fracture piece, and the soft tissue that can furthest remain the bone piece adheres to, has both increased fixed strength, has remain bone piece blood circulation again, is favorable to union.

Drawings

Figure 1 shows a front view of an ulnar coronal process fracture fixation device.

Figure 2 shows a side view of an ulnar coronal fracture fixation device.

Figure 3 shows a schematic view of the ulnar coronal process fracture fixation device after intraoperative fixation.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

As shown in fig. 1-3, the present embodiment provides an ulna coronal process fracture fixation device, which includes a plate body 10, the plate body 10 has a main body shape conforming to the anatomical curvature of the ulna coronal process surface, so that the ulna coronal process surface is conformed, and at the same time, no additional bending and shaping are required during the operation, which is convenient for the operation during the operation.

The proximal end of the plate body 10 near the ulnar coronal process is provided with two first locking holes 101 which are arranged side by side, each first locking hole 101 is used for receiving one locking nail, and the fixed direction angle of the locking nail in the first locking hole 101 is approximately parallel to the elbow joint, so that the locking nail can not penetrate into the joint surface when being locked.

The distal end of the plate body 10 away from the ulna coronal process is further provided with two second locking holes 102 arranged side by side, each second locking hole 102 is used for receiving one locking nail, and the fixed direction angle of the locking nail in the second locking hole 102 inclines to the elbow joint direction to form an included angle of 15-45 degrees, so as to form a stable supporting and fixing effect on the fracture block.

In this embodiment, the two first locking holes 101 and the two second locking holes 102 are arranged in a substantially rectangular shape, so that two rows of locking holes are formed in the plate body 10 in the transverse direction and the longitudinal direction, so that the bone fixing plate can fix both large bone pieces and small bone pieces, when the bone pieces are small, soft tissue adhesion of the bone pieces can be kept as much as possible, the bone pieces are fixed in a wrapping manner, direct pressurization of the bone pieces is not needed, fracture of the bone pieces is not easy to cause, the soft tissue adhesion of the bone pieces is kept to the maximum extent, the fixing strength is increased, blood circulation of the bone pieces is kept, and fracture healing is facilitated.

The ulnar coronal fracture fixation device provided by the present embodiment is applicable to both Regan-Morrey i and ii types of simple or comminuted fractures, and is particularly applicable to the fixation of comminuted and articular-surface-adjacent bone fragments. When the ulna coronary process fracture fixing device provided by the embodiment is used for fixing II and III types of comminuted or non-comminuted fractures, an elbow front side s-shaped operation access is adopted in the operation, the fracture can be more clearly exposed by adopting the elbow front side s-shaped operation access, the reduction and the fixation of the fracture are carried out under direct vision, and the interference to the vascular nerve is not large.

When treating simple ulna coronary process fracture, the operation incision enters from the muscular gap, and the amount of bleeding is small. The median nerve is divided into more branches towards ulnar side, brachial artery and vein are divided into radial branch, the median nerve enters into the brachial artery and vein, the median nerve is pulled towards the inner side, the brachial artery and vein are pulled towards the outer side, tissue damage can be reduced as much as possible, the brachial muscle is longitudinally split, the damage to muscle tissue is small, the visual field is clear, the fracture block and the front part of the elbow joint can be fully exposed, and the fracture reduction and internal fixation are facilitated. The approach does not need to suture deep tissues of a patient, only sews skin incisions, can promote the recovery of fracture parts of the patient, and reduces the incidence rate of postoperative ankylosing and ossifying myositis.

In this embodiment, the bottom surface of the plate body 10, which is fitted to the ulna coronal apophysis surface, is further provided with a plurality of sharp teeth 103, and the sharp teeth 103 can fix the plate body 10 and the reduced fracture block together, so as to avoid the reduction loss caused by the displacement of the bone block; the plate body 10 can also be fixed on the periosteum to play a role of temporary fixation.

In this embodiment, the proximal end of the plate body 10 further has a supporting portion 104 extending towards the ulnar coronal process, the supporting portion 104 has an anatomical curvature conforming to the ulnar coronal process, and the supporting portion 104 is better conformed to the ulnar coronal process in the operation, so that the plate body 10 can support the ulnar coronal process well, and the plate body 10 can ensure the reduction and fixation of the fracture.

In the embodiment, the plate body 10 has a first hollow-out portion 105 in a region surrounded by the two first locking holes 101 and the two second locking holes 102, the support portion 104 has a second hollow-out portion 106, and the hollow-out region of the plate body 10 can be implanted with an anchor for repairing and reconstructing a humeral muscle insertion point during an operation.

In the present embodiment, the first locking hole 101 and the second locking hole 102 each have an internal thread therein for mating with a locking nail, which can be directly fixed by a locking screw of a corresponding size.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (7)

1. An ulna coronal process fracture fixation device, characterized in that: the elbow joint locking device comprises a plate body which is provided with an anatomical radian according with the ulna coronal process, wherein two first locking holes which are arranged side by side are formed in the near end of the plate body close to the ulna coronal process, each first locking hole is used for receiving one locking nail, and the fixed direction angle of the locking nail in each first locking hole is approximately parallel to the elbow joint; the plate body is further provided with two second locking holes which are arranged side by side at the far end away from the ulna coronal process, each second locking hole is used for accommodating one locking nail, and the fixed direction angle of the locking nail in each second locking hole inclines to an included angle of 15-45 degrees towards the elbow joint direction.

2. The ulnar coronal fracture fixation device of claim 1, wherein: the two first locking holes and the two second locking holes on the plate body are arranged in a roughly rectangular mode.

3. The ulnar coronal fracture fixation device of claim 2, wherein: the plate body is provided with a first hollow-out part in an area defined by the two first locking holes and the two second locking holes.

4. The ulnar coronal fracture fixation device of claim 1, wherein: the bottom surface of the plate body, which is attached to the ulna coronal apophysis surface, is also provided with a plurality of sharp teeth.

5. The ulnar coronal fracture fixation device of claim 1, wherein: the proximal end of the plate body is also provided with a support portion extending in the direction of the ulnar coronal process, and the support portion has an anatomical curvature conforming to the ulnar coronal process plane.

6. The ulnar coronal fracture fixation device of claim 5, wherein: the supporting part is provided with a second hollow part.

7. The ulnar coronal fracture fixation device of claim 1, wherein: the first locking hole and the second locking hole are internally provided with internal threads matched with the locking nail.

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