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作者用特异性放射免疫法测定５０例上消化道出血患者和２８例正常人血浆ＥＴ含量。结果发现上消化道出血患者血浆ＥＴ含量明显高于正常人；随着失血程度的加重，ＥＴ含量显著增加。提示循环血中ＥＴ含量的变化可能与上消化过出血失血程度有关。
The authors used specific radioimmunoassay in 50 cases of upper gastrointestinal bleeding and 28 cases of normal plasma ET levels. The results showed that patients with upper gastrointestinal bleeding plasma ET levels were significantly higher than normal; with the degree of blood loss increased, ET content increased significantly. Tip changes in ET content in circulating blood may be related to the degree of bleeding on the upper digestive bleeding.