作者在150例门诊病人连续的双对比钡灌肠中进行了三种清洁肠方法的双盲研究,A组采用少渣饮食,检查前一日下午2时口服30ml蓖麻油,次晨在放射科作清洁灌肠,至少一小时后开始灌肠检查;B组自检查前一日中午始进严格的流质饮食,每小时至少饮一杯清饮料,禁饮汽水,下午3时口服1ml/kg的番泻叶制剂(Prunasine),剂量不超过75ml,不作清洁灌肠;C组饮食措施同B组, The authors conducted a double-blind study of three clean bowel methods in 150 consecutive outpatients with double contrast barium enema. Group A used a low residue diet and examined 30 pounds of castor oil orally at 2 p.m. on the previous day. The next morning was in the Department of Radiology. Cleansing enema, at least one hour later began enema examination; group B began a strict liquid diet from noon on the day before the examination, drink at least one cup of clear drink per hour, banned soft drinks, orally 1 ml/kg of senna preparation at 3 pm (Prunasine), dose no more than 75ml, no cleansing enema; group C diet with group B,