人体血液中的 PH 值、氧分压、二氧化碳分压以及由此而推算出来的剩余碱、碳酸氢根等一系列数值都随着温度的不同而变化。因此,为了准确地测量出血气值、所有血气分析仪都必须严格控制测量室内的温度。一般控制在37℃恒温下测量。瑞士 AVL—940型血气分析仪的测量室温度控制系统分为加热控制和温度监视。测量室内有两个相同的用于检测温度的热敏电阻(NTC)。一个将温度的变化转换成电信号变化,送给加 PH value of the human blood, partial pressure of oxygen, partial pressure of carbon dioxide and the resulting residual base, bicarbonate and a series of values ​​vary with temperature. Therefore, in order to accurately measure the bleeding value, all blood gas analyzers must strictly control the temperature inside the measuring chamber. General control at 37 ℃ constant temperature measurement. Switzerland AVL-940 blood gas analyzer measuring chamber temperature control system is divided into heating control and temperature monitoring. There are two identical thermistors (NTCs) in the measurement chamber for temperature detection. A change in temperature will be converted into electrical signals, given plus