Femoral intramedullary nail device, use method and application thereof

Abstract

The invention provides a femoral intramedullary nail device, a use method and the application thereof.The femoral intramedullary nail device comprises a main nail and a lag screw, a through obliquely-inserted locking hole is formed in the surface of the main nail, the lag screw comprises an inner core rod and a sleeve rod which are arranged in a nested mode, the sleeve rod is divided into a deformation section and a fixing section, the main nail is implanted into a femoral medullary cavity. the lag screw penetrates through the oblique insertion locking hole, the deformation section is screwed into a separated fracture block, the fixing section is fixed in the main nail, the fixing section is of a tubular structure, the deformation section comprises at least two bendable ridge plates, the bendable ridge plates surround the inner core rod, grooves are formed in the middles of the bendable ridge plates. The device is rotated to extrude the deformation section, and the bendable edge plates are bent towards the periphery from the grooves. The femoral nail has small influence on the fracture end of the femur, enhances the elasticity of the main nail, conforms to the anterior arch angle characteristics of the femur, and can reduce the stimulation to the medullary cavity.

Description

technical field [0001] The invention belongs to the technical field of internal fixation in orthopedics, and relates to a femoral fixation device, in particular to a femoral intramedullary nail device and its use method and application. Background technique [0002] The femur is usually divided into two ends. The proximal end has a circular femoral head, pointing inward and forward, and forms the hip joint with the acetabulum. The narrow part below the femoral head is the femoral neck. bending. Femoral fractures are prone to occur at the round femoral head at the proximal end, but less commonly at the distal end. Adults can experience hip dislocation, and the elderly are prone to femoral head fractures. [0003] After the human femur is fractured, intramedullary nails are usually used to connect the broken bones. After a wound is made at one end of the bone and the intramedullary nail is implanted, lag screws and fixation nails are respectively installed at the proximal and...

AI Technical Summary

Problems solved by technology

[0007] Most of the main nails of the existing intramedullary nails are vertically implanted into the medullary cavity, which will stimulate the medullary cavity and cause pain. Although the distal end has been slotted, this problem has not been fundamentally solved. may cause dislocation between the fracture gaps during insertion

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