Minimally invasive phalanx avulsion fracture reduction internal fixation device

Abstract

The invention discloses a minimally invasive phalanx avulsion fracture reduction internal fixation device. The minimally invasive phalanx avulsion fracture reduction internal fixation device comprisestwo row nail fixator assemblies and a connecting mechanism. A fixing frame, a threaded rod, an upper inserting plate hole, a lower inserting plate hole, a double-row nail guiding inserting plate, a single-row nail guiding inserting plate, a second guiding hole, a guiding hole, a row nail fixing inserting plate, a fixing hole, a connecting plate, an inserting groove, an inserting groove hole, a supporting frame, a rotary knob, a double-row nail special pressurizing rod, a single-row nail special pressurizing rod, a single-row nail, a through groove and a double-row nail are mutually cooperated, therefore, fracture reduction and fixation can be facilitated, and patient rehabilitation is promoted. Moreover, the economic cost is low, the fixator assemblies can be repeatedly used after being disinfected and sterilized, the economic cost is saved, meanwhile, the operation difficulty is simplified, the operation time is shortened, wounds are small, blood supply around an avulsion fracture block is protected, reduction loss after internal fixation is prevented, first-stage healing of avulsion fracture is achieved, complications such as nail path infection are avoided, and great convenience is brought to a user.

Description

technical field [0001] The invention relates to the technical field of minimally invasive phalanx avulsion fracture, in particular to a minimally invasive reduction and internal fixation device for phalanx avulsion fracture. Background technique [0002] For phalanx avulsion fractures, the most similar existing techniques are Kirschner wire internal fixation and U-shaped finger drag external fixation. Kirschner wire is a commonly used surgical implant in orthopedics. It is a straight stainless steel needle with a pointed end and a blunt end with a smooth surface. Its specifications are generally fixed at about 23 cm long and 0.88-4 cm in diameter. It is used to fix small fractures or avulsion fractures and other fractures with low stress. It is also often used in the fixation of temporary fracture fragments in orthopedic surgery. U-shaped finger drag is another external fixation method commonly used in orthopedics for conservative treatment of local immobilization. It has...

AI Technical Summary

Problems solved by technology

2. Since the Kirschner wire needs to be drilled by the power system, it will cause thermal damage to the surrounding soft tissue and bone

3. The use of Kirschner wires for fixation largely depends on the experience of the surgeon, the error rate is high, the operation time is long, and repeated piercings have a great impact on the avulsion of the fracture fragment.

5. Since the Kirschner wire has no thread, the internal fixation is easy to loosen; if the avulsion fracture fragment is small, when only one Kirschner wire is used for fixation, there will be unstable rotation and loss of reset is prone to occur

6. And because the tail end stays outside the body, patients are required to take care of the nail tract, so there are still risks such as nail tract infection

Fractures often achieve secondary healing, which can easily cause malunion and affect the function of the affected limb

2. When the closed injury is combined with the tendon injury, the avulsion fracture is likely to form fracture disunion or hammer finger

Therefore, not only is the patient's activities limited, but he may also face the risk of a second surgery.

3. The patient wears the fingers for as long as one month, which is likely to cause complications such as interphalangeal joint stiffness, and the prognosis is poor

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