烦躁不安是由于止血带疼痛引起。如果止血带充气压力过大时间过久，尤其在臂丛神经麻醉、硬膜外麻醉时，据研究66%以上此类患者 出现止血带部位的疼痛。一般在止血带充气30～60min后出现，患者表现出难以忍受，烦躁不安，即使使用镇静和镇痛药也难以控制。研究表明，皮肤和深部组织如血管和肌肉受压后都可导致止血带疼痛，且由于缺血-再灌注损伤造成缺血后水肿。止血带充气应在麻醉效果彻底后进行。止血带压力不可过大，时间不可过长。定时通知手术医生做止血准备，松止血带5～10min后，可再次充气使用，重新记时。 The restlessness is caused by the pain of the tourniquet. Time is too long if a tourniquet inflation pressure is too high, especially in brachial plexus anesthesia and epidural anesthesia, according to a study by more than 66% of such patients tourniquet parts of the pain. After 30 ~ 60min of the tourniquet, the patient showed an unbearable, fidgety, even with sedative and analgesic. Studies have shown that both skin and deep tissue, such as blood vessels and muscles, can cause pain in a tourniquet, and because of ischemia - reperfusion injury causes ischemia to edema. The tourniquet should be carried out after the anesthetic effect is complete. The stress of the tourniquet is not too much, the time is not too long. Periodically inform the surgeon to prepare for the hemostasis. After 5-10min, the patient can be reinflated and recharged.