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应用口服标志物Ｘ线造影和乳果糖氢呼气试验测定胃肠通过时间（ＧＩＴＴ），右半结肠通过时间（ＲＣＴＴ），左半结肠通过时间（ＬＣＴＴ）和口－回盲瓣通过时间（Ｍ－ＩＴＴ）。检测３５例ＩＢＳ患者（便秘型１６例，腹泻型１９例），并与１４例健康志愿者对照。结果：①ＩＢＳ腹泻型患者ＧＩＴＴ，Ｍ－ＩＴＴ明显缩短，便秘型患者延长；②ＲＣＴＴ三组无显著差异；③ＬＣＴＴ便秘型患者延长。研究提示ＩＢＳ患者结肠，小肠通过功能均有异常。
The oral transit time (GITT), right colon transit time (RCTT), left colon transit time (LCTT) and oral-ileocecal valve passage time (M -ITT). Twenty-five IBS patients (16 constipation and 19 diarrhea) were detected and compared with 14 healthy volunteers. Results: ①The GITT and M-ITT in IBS patients with diarrhea were significantly shortened and constipation patients were prolonged; ② There was no significant difference between the three groups in RCTT; ③The patients with LCTT constipation were prolonged. Research suggests that patients with IBS intestinal, small intestine through abnormalities.