摘要
用乳糖氢呼吸试验检测了18例20～65岁正常人基础氢值均在30PPM以下,平均22.5±3.8PPM,服乳糖后氢上升≥20PPM者13例(72.2％),平均升高62.9±64.4MMP。基本健康的70～87岁老人共17例,基础氢值19.7±4.0PPM,乳糖试验异常者7例(41.1％),呼气中氢平均升高42.4±23.6PPM。21例非器质性慢性腹泻患者基础氢平均22.7±9.0PPM,有2例>30PPM,服乳糖后异常者18例(85.7％),平均升高60.4±34.5PPM。说明我国正常人中乳糖酶缺乏的阳性率约为72.2％。高龄老人中阳性率41.1％,有随年龄增高逐渐适应的趋势。非器质性腹泻组乳糖酶缺乏的阳性率85.7％,且有2例空腹氢含量升高,提示乳糖酶缺乏可能与部份慢性腹泻患者的病因有关,这类病人在症状发作期间限制乳类制品是值得推荐的。
Lactose hydrogen breath test was performed in eighteen normal persons ranged from 20～65 years old, the basic hydrogen value was all below 30ppm, average 22.5±3.8ppm. After orally gave lactose, however, the hydrogen value was elevated≥20ppm in thirteen persons (72.2%), average 62.94±64.4ppm. In seventeen old persons aged between seventy to eighty-seven, the basic hygrogen was also normal, average 19.74±4.0ppm, there were seven persons (41.1%) hydrogen abnormal in expiration in lactose test, the elevated value was 42.4±23.0ppm. The average value of basic hydrogen in twenty-one cases of non-pathologic chronic diarrhea was 22.7±9.0ppm, there were two cases>30ppm. After oral lactose, there were eighteen cases expiration hydrogen abnormal (85.7%), the everyage elevated value was 60.4±34.5ppm. It is suggested that lactase deficiency have a prevalence of about 72.2% in Chinese people; But there is about 41.4% in old persons, it could show better tolerated accompanying ageing; Lactase difiency may be one of the pathog chronic diarrhea patients, and reducing the amount of milk drunk is recommend when complained of symptoms.
