论文部分内容阅读
目前,国内外广泛开展用描记的心阻抗图来测定人体心血管的各种参数。因为这种描记方法是无损伤性的,所以得到广大受试者的普遍欢迎。1976年,日本伊藤等人在恒流式阻抗图仪的基础上研制成恒流式导纳图仪,他们是把阻抗信号通过除法器变成导纳信号,从而第一次描出人体的导纳图。但由于加入了除法器,不可避免地会使信号产生转换误差,并且仪
At present, widely used at home and abroad to carry out a description of the heart impedance plot to determine the human cardiovascular parameters. Because this tracing method is non-invasive, it is widely accepted by the majority of subjects. In 1976, Ito et al. Of Japan developed a constant-current admittance charter based on the constant current impedance mapper. They converted the impedance signal into an admittance signal through a divider, so that the admittance of the human body was first described Figure However, due to the addition of the divider, the signal will inevitably lead to conversion error, and instrument