作者以甘露醇作试验糖建立了氢气呼吸试验测定小肠传递时间。45名对象分别服15及20g甘露醇后41名呼气中氢气含量明显升高(91％),用钡餐透视法作对照发现甘露醇进入盲肠后平均6.6分钟开始产氢。两法所测定的小肠传递时间具有高度相关性(r=0.80,P<0.001),说明本法准确、可靠。与国外采用的乳果糖相比,甘露醇具价格便宜、来源丰富等优点,适于国内推广应用。 The author used mannitol as a test sugar to establish a hydrogen breath test to determine the transit time of small intestine. Forty-five subjects were given 15 and 20g mannitol, respectively, and the content of hydrogen in 41 breaths was significantly increased (91%). Using barium meal fluoroscopy as a control, mannitol began to produce hydrogen after an average of 6.6 minutes after entering the cecum. Small intestine transit time measured by the two methods was highly correlated (r = 0.80, P <0.001), indicating that this method is accurate and reliable. Compared with the foreign milk lactose, mannitol with cheap, rich sources, etc., suitable for domestic promotion and application.