ketamine intravenous anesthesia

例句：

1. 1. The patient was given ketamine intravenous anesthesia for the surgery.
   患者接受了氯胺酮静脉麻醉进行手术。
2. 2. The doctors used ketamine to sedate the patient during the procedure.
   医生使用氯胺酮使患者在手术过程中保持镇静。
3. 3.In some cases, ketamine has been shown to be effective in treating severe pain.
   在一些情况下，氯胺酮已被证明对治疗严重疼痛有效。