Intramedullary fixing system

Abstract

The invention relates to an intramedullary fixing system. The intramedullary fixing system comprises a lock pin block and an expansion rod, wherein a taper hole is formed in the middle of the lock pinblock, an inner sleeve is sleeved with the taper hole, and a plurality of springs are arranged between the inner sleeve and the taper hole to achieve a universal structure of the inner sleeve; the expansion rod is formed by winding a plurality of winding rods around a semi-threaded rod, one end of each winding rod is fixed to one end of the semi-threaded rod, the other end of each winding rod isconnected with a second sleeve, the second sleeve is provided with an internal thread which is in threaded connection with an external thread at the other end of the semi-threaded rod, and the secondsleeve moves axially on the semi-threaded rod to achieve expansion and contraction of the expansion rod; the expansion rod abuts against a semi-hole in the lock pin block and is used for fixing the lock pin block; and the lock pin block is placed in a medullary cavity through an aiming tool and moved to a proper position, the expansion rod is expanded to fix the lock pin block, and a locking screwpenetrates through the lock pin block through an aiming hole of the aiming tool to fix a fracture part. According to the intramedullary fixing system, the position and angle of a screw hole can be changed at will, and indications such as trunk fracture combined with near-end or far-end complex fracture are greatly increased.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to an intramedullary fixation system. Background technique [0002] Proximal femoral fractures include femoral neck fractures, intertrochanteric fractures, and subtrochanteric fractures, accounting for about 7.3% of adult systemic fractures, and up to 23.8% of elderly fractures. With the aging of the global population, the incidence of proximal femoral fractures increases with age. According to reports, there are about 4.5 million cases of proximal femoral fractures in the elderly every year in the world, and the number of patients with proximal femoral fractures in the world is expected to increase to 21 million in the next 40 years, and the incidence of Asians accounts for about 50% of the global incidence. . The increasing treatment demands of proximal femoral fractures and the high quality of life of patients have become a challenge for orthopedic surgeons. [000...

AI Technical Summary

Problems solved by technology

[0004] However, for some cadre fractures combined with proximal or distal complex fractures, it is also more complicated to deal with

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