经济舱综合征，经济舱症候群 （在飞机上空间狭窄的经济舱中久坐不动而导致深静脉血栓形成）the fact of a person suffering from deep vein thrombosis after they have travelled on a plane. This condition is thought to be more common among people who travel in the cheapest seats because they do not have space to move their legs much.