一种皮下注射针式氧分压电极。
A hypodermic needle PO2 electrode.
作者信息
Whalen W J, Spande J I
出版信息
J Appl Physiol Respir Environ Exerc Physiol. 1980 Jan;48(1):186-7. doi: 10.1152/jappl.1980.48.1.186.
Several glass-covered gold wires (5-10 micrometer diam) connected to an insulated lead wire are embedded with epoxy inside a stainless steel needle (e.g., 25 gauge). The epoxy, glass, and gold wire are carefully ground off down to the bevel of the needle, and the gold wires recessed electrolytically using NaCN. Oxygen tension (PO2) is measured polarographically, usually using a separate Ag-Agcl reference electrode. However, the stainless steel needle, connected to the shield of the coaxial lead, can also be used as the reference. The PO2 electrode shows little or no stir sensitivity and has a response time (to 100%) of 1-2 s.
几根连接到绝缘导线的玻璃包覆金线（直径5 - 10微米）用环氧树脂嵌入不锈钢针（例如25号）内。环氧树脂、玻璃和金线小心地打磨至针的斜面，金线用电解NaCN进行凹陷处理。氧分压（PO2）采用极谱法测量，通常使用单独的Ag - Agcl参比电极。不过，连接到同轴电缆屏蔽层的不锈钢针也可用作参比电极。PO2电极对搅拌的敏感性很小或没有，响应时间（达到100%）为1 - 2秒。
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