Femur osteotomy assistor

Abstract

The invention discloses a femur osteotomy assistor. The femur osteotomy assistor comprises a distal assisting piece, a proximal assisting piece and a connecting piece, wherein the distal assisting piece is mounted on the lateral surface of the far end of the femur diaphysis, the proximal assisting piece is mounted on the lateral surface of the near end of the femur diaphysis, and the connecting piece is used for fixing the relative positions of the distal assisting piece and the proximal assisting piece; distal guide needle cannulas perpendicular to the lateral surface of the far end of the femur diaphysis are arranged on the distal assisting piece, proximal guide needle cannulas perpendicular to the lateral surface of the near end of the femur diaphysis are arranged on the proximal assisting piece, an included angle between the distal guide needle cannulas and the proximal guide needle cannulas is 10-35 degrees, and during use, the femur diaphysis position subjected to osteotomy is positioned in an interval between the distal guide needle cannulas and the proximal guide needle cannulas. The femur osteotomy assistor has the advantages that accuracy in osteotomy length and rotating angle of the far end of the femur diaphysis can be improved effectively, and good surgical effect is guaranteed.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a femoral osteotomy auxiliary device for performing femur correction surgery on children with DDH (developmental dysplasia of the hip, Chinese name is "developmental dislocation of the hip"). Background technique [0002] Developmental dislocation of the hip, characterized by loss of normal alignment of the femoral shaft 4 with the acetabulum 8, as in figure 1 As shown, most of them show that the femoral head partially or completely protrudes from the acetabulum, resulting in the diseased femur being too long relative to the normal femur, and the lesions often involve the acetabulum, femoral head, joint capsule, and ligaments and muscles around the hip joint. Developmental dislocation of the hip is a common bone developmental disease in children, often accompanied by increased femoral anteversion, and increased femoral anteversion is also one of the causes of secondary ac...

AI Technical Summary

Problems solved by technology

In the traditional Kirschner wire surgical treatment process, the surgeon can only determine the rotation angle of the distal end of the femur (that is, the degree of anteversion to be corrected) by visual inspection, and then insert the two Kirschner wires on the femur. Not only does it require a very high level of experience for the surgeon, but it is also very prone to deviations. The incidences of insufficient and excessive rotation angles are as high as 15% and 44% respectively, which makes it difficult to cure the root cause of the disease or cause posterior dislocation of the femoral shaft

At the same time, due to the lack of accurate control of the length of the osteotomy with the help of limiting components during the osteotomy, it is easy to cause the osteotomy to be too short or too long, which greatly affects the health of the patient.

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