10 mg of ephedrine given by intravenous drip before anesthesia, can preventhypotension in caesarean section patients, the bradycardia nausea and vomiting rate were also significantly lower.

• 麻醉前预先静脉滴注麻黄素10mg能够预防剖腹产腰麻后低血压的发生,减少恶心、呕吐和心动过缓等并发症。