【摘要】 目的研究并实现一种小儿肺血管阻力无损估测系统。方法使用计算机采集心电信号与超声多普勒血流信号 ,经过声谱分析、谱图包络提取和特征点识别 ,定量估测肺循环血液动力学参数 ,从而实现小儿肺血管阻力的临床无损估测。结果本系统计算的小儿肺循环血液动力学参数与临床手术检测的统计值之间具有一定的相关性和较好的一致性 ,说明无损估测的肺血管阻力可以作为临床诊断的参考。结论本文提出的小儿肺血管阻力无损估测系统可以较准确地估测包括肺血管阻力在内的肺循环血液动力学参数 ,具有一定的临床应用价值更多还原

【Abstract】 Objective To study and develop a non invasive system for estimation of children’s pulmonary vessel resistance (PVR). Method ECG signals and blood flow ultrasound Doppler signals were sampled. Then the spectrogram of the signals were analyzed. By extracting the envelop and its feature points from the spectrogram, hemodynamic parameters of the pulmonary circulation, including pulmonary vessel resistance, were finally calculated. Result The hemodynamic parameters of pulmonary circulation estimated using this system were well related to the clinical statistical data. It showed that the estimated PVR is an useful index for clinic diagnosis.Conclusion The system proposed in this paper can be used to estimate the PVR.更多还原