1.What is Hemianesthesia? Spinal nerves manage sensation and movement in different parts of the body due to their different locations. Using this principle, we inject anesthetic drugs into the back of the body to temporarily block the action of certain spinal nerves, so as to achieve the purpose of operating on the area managed by the spinal nerves without the patient feeling any pain. This kind of anesthesia, the patient will not lose consciousness, only the lower half of the body can not move, so it is called hemianesthesia. 2.Will hemianesthesia hurt the spine? Half anesthesia will not hurt the spine because the drug is given through the gap between the spine to temporarily block the nerve, so it will not hurt the spine. 3.What are the possible sequelae of hemianesthesia? The possible sequelae of hemianesthesia include urinary retention, nerve damage, infection, etc., but they are rare; the most common is headache after dural puncture (can be prevented by lying down for 6 hours after the anesthesia)^ 4. Is it easy to get back pain after receiving hemianesthesia? The incidence of back pain after hemianesthesia is the same as that of general anesthesia, and most of them can be treated spontaneously. The effects of spinal anesthesia usually begin to diminish two hours after anesthesia, and it takes eight hours for full consciousness to return. If you can keep lying down for six hours after anesthesia, drink more water after getting up, and get out of bed slowly, you will be less likely to have back pain. 5.Can patients choose the type of anesthesia? Anesthesiologists will choose a suitable anesthesia method after understanding and analyzing the requirements of the surgery and the patient’s specific situation, and will inform the patient and give necessary explanations. If the patient has his/her own opinion about a certain anesthesia, he/she can propose it to the doctor, who will consider the patient’s opinion and combine it with his/her professional thoughts to formulate a safe, effective, and comfortable anesthesia plan. 6.What are the precautions before surgery? Before the surgery, patients should firstly remove their worries and consult your doctor about the purpose of the surgery, anesthesia method, surgical position, various risks and possible discomfort during the surgery. Try to cooperate with the guidance of medical personnel to make good preoperative preparations, quit smoking and drinking, brush your teeth in the morning and evening, have oral diseases should be diagnosed and treated as soon as possible, and carry out all kinds of training needed after the operation. If you are taking medication for other diseases before the surgery, you should explain to the doctor whether you need to stop the medication. Before going into the operating room, fast for 10 hours (4-8 hours for children), and empty the urine if the patient does not have a urinary catheter. In addition, because the anesthesiologist needs to conduct preoperative visits, the patient is best to stay in the ward the day before the operation and not go out, and those who have difficulty in communication must be accompanied by family members who are familiar with the condition. 7.Why should I fast before surgery? The day before surgery, patients will be informed not to eat or drink after 8:00 p.m. (10:00 p.m. for children), because the operation of surgery and anesthesia as well as the medication given during the operation may cause the patient to vomit, and if food and gastric juice are inhaled into the trachea by mistake, it may lead to respiratory difficulty or respiratory failure, and complications such as aspiration pneumonia may occur after the operation. Therefore, fasting before surgery is very important, and we hope to draw the attention of patients and their families. 8.Why do I still have feelings after anesthesia? After anesthesia, many patients will ask the anesthesiologist this question. In fact, in addition to general anesthesia, most of the anesthesia methods themselves do not affect the consciousness, the patient stays awake, the nerve block area (the anesthetized part) is not without all the sensation, touch, pressure and proprioception still exist, only the temperature sensation, pain and so on have disappeared. As most patients will have different degrees of tension after entering the operating room, the anesthesiologist will usually give appropriate drugs to make the patient sedated to sleep, so we do not need to worry. 9. Will postoperative analgesia affect wound healing? After the operation, the anesthesiologist will use different analgesic methods according to different conditions of the patient, and these analgesic methods will not increase the infection rate of the wound and affect the growth of the tissue around the incision. Effective analgesia can also improve sleep, enhance postoperative immune function, facilitate patients’ coughing and phlegm expulsion, and get out of bed earlier, thus accelerating postoperative recovery and effectively reducing postoperative complications such as lung infection and lower extremity venous embolism. 10.Why is there postoperative chills? Postoperative chills refers to involuntary muscle contraction and twitching after surgery, and its specific cause is still unclear. Local anesthetic, inhalation anesthetic gas, prolonged surgery, large amount of intraoperative blood and fluid transfusion and exposure of the operation field will all increase the incidence of chills. Warmth, oxygen can make chills can be relieved, if necessary, the doctor will give some drug treatment. 11.What about postoperative agitation? Due to the residual effects of drugs, general anesthesia after surgery, patients may appear emotional fluctuations, restlessness, this time the family should cooperate with the medical staff to do a good job of immobilizing the patient in order to prevent falls or injuries, and at the same time try to calm the patient, pay attention to the observation of abnormalities, and accompanied by the patient until fully awake. 12.Will general anesthesia affect the intelligence? The general anesthetics used in modern anesthesia are drugs with minimal impact on the human body and reversible effects, which can be completely discharged through human metabolism after surgery. Every year, there are millions of surgeries using general anesthesia worldwide, and it has been proved by practice that, under the correct use of professionals, general anesthetics will not have any impact on intelligence.