Ropivacaine hydrochloride trade name is Nelapin, Zoltan, Hengelo, is a new type of long-acting amide local anesthetic, is the only local anesthetic that can produce motor-sensory separation. It is especially suitable for painless delivery in obstetrics, which neither feels pain nor affects maternal exertion, and has a slow onset of action, so it is used clinically in combination with lidocaine which has a fast onset of action, with a long maintenance time and anesthesia lasting 5-7 hours. It is mainly used for intravertebral anesthesia, brachial plexus nerve block, cervical plexus nerve block, etc. It can also be used for local anesthesia for surgeons. Ropivacaine hydrochloride is available in two dosage forms: powder and injection, with various specifications. 75mg/stem and 100mg/stem are more commonly used in the anesthesia departments of major hospitals.