Femoral head necrosis medullary core decompression device

Abstract

The invention discloses a femoral head necrosis medullary core decompression device. The device comprises an outer guiding tube, an inner guiding tube and a soft drill bit assembly; the outer guidingtube is a straight tube; the inner guiding tube comprises a straight tube section and a bending section which are connected with each other, and the bending section deflects towards one side of the straight tube section, extends from one end of the outer guiding tube and protrudes from the other end of the outer guiding tube; the soft drill bit assembly comprises a drill bit, a soft drill rod anda hard drill rod which are sequentially connected, and the drill bit penetrates through the straight tube section and protrudes out of the bending section. The femoral head necrosis medullary core decompression device has the advantages that the bending section can protrude out of the outer guiding tube, the drill bit penetrates out of the bending section, the operation range of the drill bit is enlarged, the necrotic bone tissue is effectively and completely removed, and the full decompression is facilitated.

Description

technical field [0001] The invention belongs to the technical field of medical instruments, in particular to a decompression device for a femoral head necrosis pulp core. Background technique [0002] Necrosis of the femoral head is a type of avascular necrosis, which is a type of osteonecrosis, and the lesion leads to destruction of articular cartilage and collapse of the femoral head, eventually leading to loss of hip joint function. Femoral head necrosis caused by various reasons takes ischemia of the femoral head as its final pathological change. Necrosis of the femoral head requires interventional surgery in the early stage of collapse to preserve the femoral head to the maximum extent and avoid further collapse and damage. [0003] Core drilling decompression surgery is to drill a hole into the femoral head under X-ray fluoroscopy under the greater trochanter of the femur to maintain a certain neck-shaft angle and anteversion angle, so that the tip of the Kirschner wi...

AI Technical Summary

Problems solved by technology

However, due to the sclerosis of the necrotic bone tissue and the limited scope of the channel, some necrotic bone tissue often remains, so that the femoral head cannot be completely decompressed, thus affecting the surgical effect.

Images