抽象
P.K.摩根标记II口腔仪包括涡轮换能器和控制/读出单元,其包含VENTX5A或VEARTX6A程序。该设备用于测量氧气消耗测试期间的微小通风。在连续和脉动流动期间,检查了六个这些装置(带有两个涡轮机的Ventx5a和两个带有两个不同涡轮机的Ventx6as)的精度和精度;精度受校准程序期间注射器速率的影响。参考标准是350升柯林斯链条补偿气计。在连续流动时,两个VENTX5A器件在60-160 L.MIN-1的范围内显示出99.5-100.5%的精度,而四个VENTX6AS的装置在60-200μlmin-1的范围内为99.3-102.1%。对于跨越15-200L.min-1的微小体积的窦曲线流量的平均精度范围为96.1-101.3%;VENTX6AS的可比数据为95.9-98.9%。这些平均精度在测量的微小体积> 80L.min-1处改善了Ventx5a的98.1-101.3%。 Omission of the two lowest tidal volumes (1 and 1.5 l) for the VENTX6As narrowed the range of accuracy to 96.9-98.5%. The coefficients of variation for five trials at each minute ventilation were 0-0.2%. We conclude that, while the P.K. Morgan Mark II Ventilometer has excellent precision, its accuracy is dependent on the calibration syringe rate, minute ventilation and program.