脑死亡又称过度昏迷(Coma depasee)或不可逆昏迷。此时,患者虽有心跳,并可维持一定的血压,但脑血循环早已断绝。脑实质为不可逆性损害。在机械控制呼吸及药物维持下,心跳有时虽可维持数天,但最终仍难免于死亡。就目前水平,尚无在脑死亡发生后再抢救成功者。一九五九年国外开始有此类报导,各家并提出了不同的诊断标准。国内尚未见此类报 Brain death is also known as Coma depasee or irreversible coma. At this point, although patients have heartbeat, and can maintain a certain blood pressure, but the cerebral blood circulation has long been cut off. The parenchyma is irreversible damage. Under mechanical control of breathing and drug maintenance, the heart rate can last several days, but in the end it is still hard to avoid death. At the current level, there is no rescuing success after brain death. In 1959 foreign countries began to have such reports, and various standards were put forward. Such reports have not yet been seen in China