November Golden Week has just passed, many people in the long holiday travel, Zhang is no exception, but this trip should be a good travel plan, almost killed Zhang. What is going on here? In order to show filial piety, Zhang’s daughter decided to take her dad on vacation to the United States. But just off the plane, did not have time to see the bustling metropolis of the United States, the old Zhang went to the emergency room because of chest pain, breathing difficulties. After the doctor’s consultation, the old man had a “pulmonary embolism”. This can be the old Zhang and his daughter scared out of a cold sweat. How did the pulmonary embolism happen on a plane for no reason? Immobility induced pulmonary embolism flying and pulmonary embolism were originally two unrelated terms, but if the long-distance plane ride when immobile, it becomes a trigger for pulmonary embolism. There is a disease called: “economy class syndrome”, which refers to the long time sitting in the economy class of the airplane, the space is small, the person is still or less activity, the blood flow of the lower limbs is slow, easy to form lower limb venous thrombosis. When the patient moves, the fresh thrombus is not firmly bonded to the blood vessel wall, which can easily cause the embolus to fall off. The dislodged embolus enters the pulmonary artery with the blood flow, blocking the blood vessel, and pulmonary embolism occurs. However, not only flying, but any behavior that is stationary for a long period of time – riding trains, cars, surfing the Internet, playing mahjong, prolonged surgery, bed rest, etc. are all high-risk factors for the formation of blood clots. Therefore, during a long trip, it is best to get up and move around every 1-2 hours to promote blood return and prevent the formation of blood clots. Drinking less water during travel, blood stickiness is easy to form thrombosis Many people will drink less water when they travel to avoid frequent visits to the toilet. But drinking less water is also a factor that induces the formation of blood clots. Less water will make the blood more sticky, and the organic fraction in the blood will be more easily deposited on the blood vessel wall, forming a blood clot. Just as the water in the water pipe with sediment drifting together, less water, sediment sink down, the water pipe becomes thinner, the water flow will be slower. But drinking water also has to be careful, coffee or carbonated drinks are not recommended. Because the caffeine in coffee and cola has a diuretic effect, will promote the metabolism of water from the body, further aggravating the blood sticky. Therefore, it is best to drink plain water or tea. Wear elastic stockings to prevent blood clots from forming in the lower extremities To avoid the formation of blood clots during long trips, people can wear elastic stockings. The elastic stockings form a pressure gradient in the lower limbs, with the greatest pressure in the ankle and gradually decreasing upward, creating an artificial upward squeezing force that promotes blood return and prevents the formation of blood clots. For patients with a history of blood clots, a prophylactic anticoagulation treatment with a low-molecular heparin injection at the hospital on the day of the flight is required for flights longer than 6 hours.