A. Who is vulnerable to deep vein thrombosis The number of deaths caused by venous thromboembolism is more than 5.4 million annually worldwide, which is more than the total number of deaths caused by AIDS, breast cancer, prostate cancer and traffic accidents. Although according to many experts and literature, Chinese people are relatively less likely to suffer from this disease, but it should not be careless. It has been found that people with prolonged sitting or lying down, old age, obesity, recent pregnancy or postpartum, serious illnesses such as dehydration, heart failure, other diseases, genetic abnormalities or medications such as birth control pills that cause abnormalities in some components of the blood that reduce the ability to dissolve blood clots, people who have had deep vein thrombosis due to infection, trauma, surgery, old blood clots, certain autoimmune diseases that cause damage to the innermost lining of blood vessels, and people who have had deep vein thrombosis Although there are many causes, each of them does not significantly increase the risk of getting the disease, which makes it difficult to prevent the disease. For example, some young people who are addicted to computer games or the Internet have reported sudden death due to pulmonary embolism after sitting still for long periods of time. Another situation should be mentioned in particular, some patients have deep vein thrombosis on the left side because the right common iliac artery compresses the left common iliac vein, while the venous blood flow of the left foot has to pass through the left common iliac vein, this compression causes the venous blood flow rate of the left foot to decrease, which will easily lead to thrombosis, called “left iliac vein compression syndrome”. It is called “left iliac vein compression syndrome”. Second, how to prevent deep vein thrombosis The three main culprits of intravascular thrombosis are: blood hypercoagulation, slow blood flow, and intimal damage. Therefore, for us, the easiest way is not to sit or lie still for a long time, but to exercise more to speed up blood circulation, even when it is inconvenient to leave the seat, you should do some exercises in the seat, contract the lower limb muscles, squeeze the calf belly, etc. In addition, you should drink more water to maintain water to prevent dehydration from causing blood hypercoagulation, and to increase the number of trips to the toilet to increase activity. Inpatients, even just after surgery, doctors will encourage more out of bed activities, which not only can prevent deep vein thrombosis, while conducive to cardiopulmonary function recovery, increase gastrointestinal motility, reduce the occurrence of pneumonia and constipation. For those who really cannot get out of bed, the doctor will take measures such as using drugs such as heparin or low-molecular heparin, squeezing calf muscles with lower limb air pumps, wearing medical elastic stockings or elastic bandages, and encouraging family members to squeeze the calf. For patients with lower limb fracture or joint replacement, more attention should be paid. According to foreign studies, up to 40% of patients can be found with deep vein thrombosis during ultrasonography. Third, the detection and treatment of deep vein thrombosis First of all, we should be vigilant and seek medical consultation promptly after finding unexplained lower limb swelling, pain and varicose veins. In our experience, the most common symptom is swelling of the lower extremities, and the first department is usually internal medicine or emergency medicine, because it can be caused by heart, kidney, and lower extremity infection. By analyzing the medical history and the results of the examination, if deep vein thrombosis is suspected, blood may be drawn for D-dimer, and color ultrasound and CT of the blood vessels of the lower extremities will be done. After the diagnosis is confirmed, the next treatment is mainly in three aspects: 1) drug injection to stop the thrombus from continuing to increase in size or even dissolve the thrombus already produced; 2) to prevent the thrombus from dislodging into the pulmonary artery by implanting a temporary or permanent inferior vena cava filter; 3) to prevent the thrombus from occurring again in the future, that is, to continue to take the oral anticoagulant Favarine for a period of time or even for life after discharge from the hospital. Pulmonary thrombosis is scary, but preventing it is simple and effective. For urban humans who are sedentary for long periods of time, all we need to do is to move more and drink more water. So the next time you sit for two hours straight, remember to get up and take a few steps, stir your legs, and keep your deep veins open.