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采样管的长度、内径和压力、温度等因素可影响气体分析仪测定值的准确性,但采样管因素常被忽视.作者对此进行了研究,发现氧(O_2)和一氧化碳(CO_2)浓度的实际测定值与采样管的长度高度负相关,与内径也有一定的关系,并提出了提高呼吸气体监测值准确性的方法.
The length, inner diameter and pressure of the sampling tube, temperature and other factors can affect the accuracy of the gas analyzer measurement, but the sampling tube factor is often neglected. The author has studied and found that oxygen (O 2) and carbon monoxide (CO 2) The actual measured value is highly negatively correlated with the length of the sampling tube and has a certain relationship with the inner diameter. A method of improving the accuracy of the monitoring value of the respiratory gas is also proposed.