Research of Non-linear Theory on the Cardiac Impedance Plethysmogram 心阻抗图非线性理论的研究
Power spectrum analysis of the finger plethysmogram in two kinds of patients with abrupt pulse and the healthy young women 两种滑脉患者与健康妇女指端血管容积脉搏波的谱分析
Atrial systolic time intervals ( ASTI) measured by cardiac impedance plethysmogram, phonocardiogram and electrocardiogram were studied in control and hypertensive subjects. 本文通过心阻抗图,心音图及心电图法对高血压患者的心房收缩时间间期(ASTI)进行了研究。
This paper derived a non-Linear function relationship between the cardiac impedance plethysmogram and the heart ejection by researching differential equation of the aortic volume change. 本文通过研究主动脉容积变化微分方程,导出了心阻抗图与心脏射血的非线性函数关系。
Methods: hD/ hS and P PA were measured on electrical impedance plethysmogram ( EIP) in 47 patients with liver cirrhosis. 方法:应用阻抗微分图,测定47例肝硬变患者的门脉指数(hD/hS)、平均肺动脉压(PPA);
[ Results] The removing noise, automatically picking up characteristic point, cerebral admittance plethysmogram, cerebral admittance differential loop, admittance spectral analysis and computing twenty-seven parameters of cerebral blood variety were provided with this program. [结果]该系统具有去除噪声信号、自动提取特征点并可对脑导纳图、脑导纳微分环及频谱进行分析,计算27项反映脑血流改变的参数。
The results indicated that the use of temporal arterial pressure pulse wave can assure the accuracy of the inflation time, avoid the potential danger existed in earlobe plethysmogram and provide a reliable base for automatic control of inflation time in ECP. 结果表明,采用颞脉压力波可以保证反搏充气时间的准确性,避免了耳脉波存在的潜在危险性,并为反搏充气时间的自动控制提供了安全可靠的依据。
Changes of intracranial pressure and cerebral electrical admittance plethysmogram of newborns after asphyxia 新生儿窒息后颅内压与脑导纳图变化的研究