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输液时经常用“张力”这个概念来说明患者脱水的性质以及输入液体渗透力的大小。要弄清这个问题,先要对溶液的一些基本特性有所了解。常温下,溶液内部如果存在着溶质微粒(分子、离子或胶体微粒)分布不匀的情况,微粒即由浓度高的部分向低的部分运动,这种现象称为弥散。如果用仅允许水分子弥散通过的薄膜将水隔为甲、乙两侧,于甲侧加入不能通过薄膜弥散的溶质(称为非弥散溶质),因为膜对
The concept of “tension” is often used during infusion to describe the nature of the patient’s dehydration and the amount of fluid infused. To understand this problem, first understand some of the basic characteristics of the solution. At room temperature, if there are solute particles (molecules, ions or colloidal particles) unevenly distributed inside the solution, the particles move from the high concentration part to the low part, and this phenomenon is called dispersion. If the water is allowed to pass through the membrane only water separated A, B on both sides of the nail side can not be added through the film of a dispersed solute (called non-diffuse solute), because the membrane pairs