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近年来有关人、动物的咽鼓管(ET)和中耳内有表面活性物质存在的研究,已有许多报道,并从不同方面不同方法对表面活性物质进行了研究。其中Enhoring起初用最大气泡压力方法(maximum bubble pressure method)研究了羊水表面张力,以后将这种方法小型化,使之可以评估容积仅为5μl的豚鼠胎气管与主支气管分泌物的表面张力。本文作者用改进的最大气泡压力法,研究ET和中耳内容积为1μl分泌物的表面张力。原理与方法:用容积为24μl的玻璃毛细滴管(内径为0.65mm)其中加入1μl的液体,垂直向下,液柱长3mm,液体下移至尖端逐渐形成气泡。分别对蒸馏水、不同浓度的甲醇、8只兔ET分泌物、17例儿童
In recent years, there have been many reports about the existence of surfactant in the eustachian tube (ET) and the middle ear of humans and animals. Surfactants have been studied from different aspects and different methods. Where Enhoring initially studied the amniotic fluid surface tension using the maximum bubble pressure method and later miniaturized it to assess the surface tension of the fetal and primary bronchial secretions in a volume of only 5 μl. The authors studied the surface tension of secretions in the ET and middle ear volumes of 1 μl using the improved maximum bubble pressure method. Principle and method: Take a volume of 24μl glass capillary tube (an inner diameter of 0.65mm) which added 1μl of liquid, vertically downward, liquid column length of 3mm, the liquid down to the tip gradually formed bubbles. Respectively, distilled water, different concentrations of methanol, ET secretions of 8 rabbits, 17 children