Simulation of the Optimal Ventilator Airflows and Study of the Loop Functions

• Main Authors: hung-wei Shieh, 謝宏偉
• Other Authors: Shyan-Lung Lin
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/30947516950966811837

碩士 === 逢甲大學 === 自動控制工程所 === 99 === In respiratory care process, the respiratory therapist generally utlize the control mode and apply parameters of the ventilator according to the clinical situation of patient. The ventilators have been categorizwd as the high risky medical apparatus, inproper operations have been concluded as the primary reason for risks. The human factor has inevitably become main factor of risk in the respiratory care process. On the other hand, the health of patient may vary at any time while mechanical ventilation is applied. The established ventilation parameters might also not fit. Addition of fault may occur due to subjective experience, and hence it is urgent to develop an intelligent mechanical ventilator. The purpose of this research is to develop simulation and controlling mechanism for ventilator as the supporting device of therapy. The PB7200 ventilator objected as the CMV mode is aimed. The research is carried for waveforms modeling and optimization subject to sine, square, and descending waveforms. Furthermore, the optimal waveforms and ventilator setting were also applied on NPB 7200 with an artificial lung. The experiments of mechanical ventilation were compared with simulation results as the pressure-volume loops and flow-volume loops were investigated. Both the simulation and experimental results are found to favorably agree with previous theoretical researches and clinical observations.