本文用二乙酰乙肟法测定了７０例受检者胃液中的尿素氮浓度，结果发现：幽门螺杆菌阳性组胃液中尿素氮浓度明显低于阴性组和对照组（Ｐ＜０．０１）。我们认为：在诊断幽门螺杆菌的感染中，测定胃液中的尿素氮浓度可做为检测手段之一。 In this paper, the concentration of urea nitrogen in gastric juice of 70 subjects was determined by diacetyl oxime method. The results showed that the concentration of urea nitrogen in gastric juice of Helicobacter pylori positive group was significantly lower than that of negative group and control group (P <0.01). We think: In the diagnosis of Helicobacter pylori infection, determination of the concentration of urea nitrogen in gastric juice can be used as one of the means of detection.