Pressurized hollow nail

Abstract

The invention relates to a medical appliance, in particular to a pressurized hollow nail, which comprises a hollow nail body, wherein a self-tapping blade head is arranged at an initial end of the nail body; the outer surface of an initial section and the outer surface of an end section of the nail body are both provided with threads; the thread pitch of the threads arranged on the outer surface of the end section is less than that of the threads arranged on the outer surface of the initial section; and the side wall of an intermediate section of the nail body is provided with a plurality of through holes. In the process of treating femur neck fracture with the hollow nail, as the hollow nail is provided with a plurality of through holes at both ends of a fracture line respectively, blood in spongy bones at a far end of the fracture line can be driven to enter into the hollow nail body through the through holes and flow out from through holes at a near end of the fracture line, and to be sent into a femoral head at the near end of the fracture line, thereby the blood exchange and circulation between two ends of a fracture section are realized and greatly accelerated. Moreover, the blood supply of corresponding femoral heads can be increased, and the fracture healing is promoted, thus the ischemic necrosis of the femoral heads is avoided. Therefore, the pressurized hollow nail is of great significance in the prevention of the ischemic necrosis of the femoral heads caused by the femur neck fracture.

Description

technical field [0001] The invention relates to a medical device, in particular to a pressurized hollow nail. Background technique [0002] Femoral neck fracture is a common fracture type in clinical practice. After femoral neck fracture, due to the special anatomical structure of the femoral neck, femoral head necrosis is often caused due to insufficient nutrition and blood supply to the femoral head. Femoral neck fracture is one of the main causes of avascular necrosis of the femoral head. At present, there is no effective method to prevent avascular necrosis of the femoral head caused by femoral neck fracture clinically. [0003] The traditional pressurized hollow nails used to treat femoral neck fractures fix and connect the two ends of the fractures together, which can only play the role of simply fixing the fractures, and cannot increase the blood supply to the femoral head after the femoral neck fractures. And also reduced the original fracture contact surface to a ...

AI Technical Summary

Problems solved by technology

At present, there is no effective method to prevent avascular necrosis of the femoral head caused by femoral neck fracture in clinical practice.

[0003] The traditional pressurized hollow nails used to treat femoral neck fractures fix and connect the two ends of the fractures together, which can only play the role of simply fixing the fractures, and cannot increase the blood supply to the femoral head after the femoral neck fractures. And it also reduces the original fracture contact surface to a certain extent, which aggravates the condition of femoral head ischemia

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