Neto S G, Mello A
Rev Bras Pesqui Med Biol. 1976 Jan-Feb;9(1):29-35.
The cardiac output evaluation is usually realized through indicator dilution techniques and this principle was applied to ventricular volume measurements. However this approach has been criticized by several workers. Based on the recently developed association of indicator dilution method with intraventricular impedance recording to cardiac output determinations, the present investigation was designed to analize the dipersion pattern of saline solution within the ventricle. Three bipolar eletrodes were placed in different positions on the left ventricle in order to record the duration in seconds, for the saline to reach these positions. The detection of the saline was done through conductibility changes at the eletrodes ends. The results indicate a time duration smaller to the indicator dispersion than those of the diastole duration, simultaneously measured.
心输出量评估通常通过指示剂稀释技术来实现，并且这一原理已应用于心室容积测量。然而，这种方法受到了一些研究人员的批评。基于最近将指示剂稀释法与心室内阻抗记录相结合用于心输出量测定的研究，本研究旨在分析心室内心脏盐水溶液的扩散模式。在左心室的不同位置放置了三个双极电极，以记录盐水到达这些位置所需的时间（以秒为单位）。通过电极末端的电导率变化来检测盐水。结果表明，与同时测量的舒张期持续时间相比，盐水扩散的持续时间更短。
