Inhalation anesthesia advantages: 1, fast onset, by adjusting the concentration and oxygen flow can quickly reach the required concentration of anesthesia; 2, fast discharge, adjusting the concentration and oxygen flow, it can be quickly discharged through the lungs, the patient resumes wakefulness quickly; 3, less impact on circulation and respiration, especially the latest inhalation anesthetic drugs such as isoflurane, sevoflurane, desflurane, strong anesthetic effect, rapid recovery, no obvious respiratory circulation 4, less side effects: except for halothane has mild liver function damage, the latest anesthetic drugs have no significant impact on liver and kidney function; 5, can not be administered through invasive means (intramuscular injection, intravenous injection). Disadvantages: 1, contamination of the working environment, long-term inhalation of medical personnel may lead to infertility, miscarriage, the risk of malformation; 2, must be combined with oxygen; 3, must be volatile tanks and anesthesia ventilator, a large investment; 4, the drugs are more expensive; 5, for part of the analgesic requirements of the surgery, appears to be insufficient analgesia, the inhibition of stress reactions; 6, some drugs may lead to liver function damage, the Some drugs may lead to liver function damage, increased intracranial pressure, patients with pulmonary disease need to be used with caution, postoperative patients appear delirium, irritability, etc. The advantages of intravenous anesthesia: 1, no environmental pollution; 2, accurate dose of drugs, the exact effect, the current target-controlled infusion technology of intravenous anesthesia drugs, can simulate the human blood concentration changes to accurately give drugs, but can achieve the expected depth of anesthesia, the patient quickly wake up after surgery recovery, our department can do a lot of patients as soon as the end of surgery to open eyes to answer, rather than as said upstairs “The depth of anesthesia is not easy to control, and the length of the excitement period in humans or animals is not well controlled or not obvious”, this is because he does not understand the metabolic kinetics and pharmacodynamics of anesthetic drugs, and is not able to use anesthetic drugs rationally. 3, less side effects, no liver and kidney function damage. 4, relative to inhalation anesthetic drugs, there are inexpensive (fentanyl), there are expensive (such as remifentanil), can be used together to reduce patient costs. 5.The impact on circulation is relatively small, the analgesic and sedative effect is clear, which can well reduce the patient’s stress reaction. 6.Rational use of sedative drugs and analgesic drugs can reduce postoperative complications, such as irritability, excitement, hypertension, etc. 7.Can be used for postoperative sedation and analgesia treatment. Disadvantages: 1.Most of them should be administered by invasive means, but of course, they can also be administered by oral, rectal, nasal spray, etc. 2. The effect on respiration is stronger than that of inhaled anesthetic drugs, which may lead to respiratory depression. 3, certain drugs, such as ketamine, can lead to postoperative delirium, but the reasonable use of sedative drugs (midazolam) can be suppressed. 4.At present, the blood concentration of most intravenous drugs cannot be detected, and certain drugs with long duration of action can lead to delayed awakening when used unreasonably (e.g., when inexperienced). In summary In terms of the range of action, strength and safety, the advantages of intravenous anesthetic drugs are greater than those of inhalation anesthesia, but the international advocacy is balanced anesthesia, that is, a variety of drugs (of course, not too many, drug interactions may appear synergistic, resulting in the patient too deep anesthesia) combined application, not only can better control the depth of anesthesia, to achieve the needs of surgery, but also can reduce the amount of a single It can not only control the depth of anesthesia better and achieve the needs of surgery, but also reduce the dosage of single drugs, reduce drug accumulation, and reduce the side effects caused by excessive drug concentration, such as intravenous compound anesthesia, static inhalation compound anesthesia, neuroanesthesia + inhalation anesthesia, etc.