Why can femur neck fracture leg shorten?

summary

The femur is the longest tubular bone in the human body. The femoral shaft consists of 2-5cm below the trochanter and 2-5cm above the femoral condyle. The femoral shaft is surrounded by three groups of muscles. Because the thigh muscle is developed, there is dislocation and overlap after fracture. The distal end of fracture tends to move inward, and the aligned fracture tends to protrude outward. This kind of displacement and angulation tendency should be corrected and prevented in fracture treatment. The popliteal artery and vein are easy to be punctured because the blood vessels are located at the rear of the femoral fracture and the distal end of the fracture is often angled backward. Now let's share about why the leg of femoral neck fracture becomes shorter? Let's go.

Why can femur neck fracture leg shorten?

First, it is mainly caused by strong direct violence, but also a small number of indirect violence. Femoral shaft fractures are mostly caused by violence, so we should pay attention to the general situation and adjacent parts of the injury.

Second, femoral shaft fractures are mostly caused by severe trauma, and the amount of bleeding can reach 1000-1500 ml. If it is an open or comminuted fracture, the amount of bleeding may be greater, and the patient may be accompanied by hemorrhagic shock such as decreased blood pressure and pale complexion; If combined with other organ injury, the manifestations of shock may be more obvious. Therefore, for such cases, we should first measure blood pressure and closely observe the dynamic, and pay attention to peripheral blood circulation.

Third, it may have common symptoms of fracture, including pain, local swelling, angular deformity, abnormal activity, limited limb function, longitudinal percussion pain or bone fricative. In addition, according to the external deformity of the limb, we should preliminarily determine the location of the fracture, especially in the external rotation position of the distal limb, and pay attention not to be confused with the manifestations of intertrochanteric fracture and other hip injuries, sometimes the two injuries may exist at the same time. If combined with nerve and blood vessel injury, the dorsalis pedis artery may have no pulsation or slight pulsation, the injured limb may have abnormal circulation, and may have superficial sensory abnormality or distal muscle strength abnormality.

matters needing attention

In recent years, due to the improvement of internal fixation equipment, the improvement of surgical technology and the change of people's concept of fracture treatment, femoral shaft fractures tend to be treated by surgery. In addition to the fracture location, type, degree of soft tissue injury, combined injury and the patient's general condition, two principles should be considered in the surgical treatment of fracture: first, there should be enough internal fixation materials, so that early functional exercise can be achieved after fixation, without fracture and failure of internal fixation equipment before fracture healing; Second, minimally invasive fracture fixation should be advocated to minimize the damage of blood supply in the fracture area, and internal fixation equipment should not have stress concentration and conform to the principle of biological fixation, so as to promote fracture healing.