美国科罗拉多大学Braverman等医生用实时超声图对11名非妊娠妇女、17名用类固醇避孕药的妇女和33名妊娠妇女进行了胆囊动力学的研究。所有对象均无胃肠、肝、胆或内分泌疾病史,均无服过任何药物。禁食一夜,翌晨测定空腹时胆囊的大小,然后进食标准流质餐(35%脂肪,15%蛋白质,余为碳水化 Brackman and other doctors at the University of Colorado conducted a cystokinetic study of 11 non-pregnant women, 17 women with steroid contraceptives, and 33 pregnant women using real-time ultrasonography. All subjects had no history of gastrointestinal, liver, gallbladder or endocrine disease and had not taken any medication. Fasting overnight, the next morning to determine the size of the gallbladder when fasting, and then fed the standard liquid meal (35% fat, 15% protein, the remaining for the carbonation