The popliteal artery is located deeper, adjacent to the popliteal surface of the femur and the posterior part of the knee capsule. It runs obliquely outward along the outer edge of the semitendinosus muscle to the level of the femoral condylar fossa in the middle of the posterior knee, and then vertically downward to the inferior edge of the popliteal muscle, where it divides into the anterior and posterior tibial arteries. When popliteal aneurysms occur, the popliteal artery may be weakened or lost, and when the femoral condyle is fractured, the popliteal artery may also be injured. What are the effective measures to prevent weakening or loss of popliteal artery pulsation? 1. Systemic factors. These include previous vascular events, hypertension, dyslipidemia, hypercoagulable states and homocysteinemia. Among them, hypertension causes increased smooth muscle resistance in small vessels, damage to the vascular endothelium, and increases the chance of thrombosis. 2.Patients with obesity and diabetes mellitus. Patients with diabetes have a variety of high-risk factors that promote the formation of arterial thrombosis, and this disease may lead to abnormalities in the energy metabolism of the vascular endothelium, causing damage to blood vessels. 3, genetic factors. Including age, gender and some specific genetic characteristics, the current study found that genetics is the most important factor. 4.Lifestyle factors. Including smoking, unhealthy diet and lack of exercise. Among them, smoking can cause vasospasm and lead to vascular endothelial damage. 5, local factors. Including increased pro-thrombotic factors, slow blood flow, narrow vascular lumen, and abnormal arterial wall structure. Patients with coagulation disorders have a greater chance of thrombosis.