Multi-azimuth reduction external fixator for bone fracture

Abstract

The invention discloses a multi-azimuth reduction external fixator for bone fracture. The multi-azimuth reduction external fixator for bone fracture comprises a mandrel, a sleeve, a slide rail mechanism, two angular fine-tuning mechanisms vertical to each other, a first bone needle mounting part and a second bone needle mounting part, wherein a first universal device is arranged between the first bone needle mounting part and the mandrel, a second universal device is arranged between the second bone needle mounting part and the sleeve, the slide rail mechanism comprises a crisscross dovetail guide rail, a first dovetail groove block fixed on a first connector sleeve, a second dovetail groove block fixed on the mandrel, a first adjusting bolt and a second adjusting bolt, the two dovetail groove blocks are slidably arranged on the dovetail guide rail, the first adjusting bolt and the second adjusting bolt are respectively connected with the dovetail guide rail in a screwed manner, each angular fine-tuning mechanism comprises an adjusting threaded sleeve, a pair of rod-end joint bearings and two connecting rods, the rod-end joint bearings are respectively connected to two ends of the adjusting threaded sleeve in a screwed manner, the connecting rods are respectively fixed onto the sleeve and the second bone needle mounting part, and each rod-end joint bearing is pivoted to the corresponding connecting rod. By the arrangement, the multi-azimuth reduction external fixator has the advantages that lateral and angular displacement of a bone fracture end can be corrected, and the reduction external fixator is labor-saving in operation and capable of lowering fracture reduction difficulty.

Description

[0001] 【Technical Field】 [0002] The invention relates to a fracture multi-directional reduction external fixator, which is used for multi-directional reduction of misplaced fracture ends in orthopedic minimally invasive surgery, and belongs to the technical field of orthopedic medical appliances. [0003] 【Background technique】 [0004] At present, the reduction of fractures in the operation is basically performed by the orthopedic surgeon. The fracture end is held with the help of tools such as bone clamps, and the assistant assists in traction and corrects the displacement of the fracture, which requires a lot of manpower. On the other hand, it is difficult to maintain after reduction. Temporary fixation needs to be achieved by means of reduction forceps, Kirschner wires or screws. Due to the large trauma, the blood supply of the fracture end is damaged, the periosteum is peeled off and the damage is large, which easily leads to delayed healing or even bone failure. In view of th...

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Problems solved by technology

On the other hand, it is difficult to maintain after reduction, and it is necessary to achieve temporary fixation by means of reduction forceps, Kirschner wires or screws. Due to the large trauma to the blood supply of the fracture end and the damage to the periosteum peeling, it is easy to cause delayed healing or even bone failure. Lian, in view of this, the existing medical device industry urgently needs a humanized external fixator for fracture reduction

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