DVT is not a physical pain that can be endured lightly, but a ruthless killer. Studies have shown that the deaths of some patients from this condition triggered by surgery can be avoided with just a minute on the operating table using a sequential compression device. Secondly, when it is superimposed upon other complications caused by surgery, it increases the difficulty of treatment for a patient. In the case of operations involving artificial blood vessel replacements, for example (surgery normally performed after several weeks of preoperative preparation), sometimes such a condition appears as hypotensive crisis. Thirdly, since a sequential compression device works via pneumonic pressure, and such pressure forces the venous blood to move in the direction of the lungs, brain function is improved. In some cases this effect prevents secondary brain damage caused by hypoxia encephalopathy. Fourthly, there is a sense in which side effects - such that sedation and diarrhea for instance - can be consciously avoided by means of sequential compression devices. However it should be emphasised that any particular potential benefit may not necessarily always occur; side effects vary according to individual patients' physical condition, age, and so on. Lastly, because a sequential compression device for DVT is very convenient to use, it can be brought in along with a patient when they return home. Then patients do not need to interrupt their courses of medication or wear bulky, inconvenient clothes; nor do they have any kind of special mobility requirements.