德国科学家设计出一种带“开关”的新药。这种抗凝血药在特定波长的光的照射下便不再发挥作用,允许血液凝结。心脏手术或肾透析期间,血液被暂时输出体外,这时需要抗凝血药发挥作用,防止血液凝结。但当血液重新输回体内后,如果不能在伤口部位正常凝结,就会造成大出血。普通的抗 German scientists have devised a new drug with a “switch.” This anticoagulant will no longer function under the illumination of light of a particular wavelength, allowing the blood to clot. During cardiac surgery or kidney dialysis, blood is temporarily exported from the body, where anticoagulants are needed to prevent the blood from clotting. But when the blood is returned to the body, if it can not be normal coagulation in the wound site, it will cause bleeding. Normal resistance