Methods: 40 patients undergoing artificial abortion were randomly divided into butorphanol combined with propofol(group BP,n=20) and propofol alone (group P,n=20) before surgery.

• 方法：择期行人工流产术患者40 例，随机分为两组：布托啡诺-丙泊酚组（BP组）和丙泊酚组（P组），每组20例。