Liu Shing-Hong, Lin Tzu-Hsin, Cheng Da-Chuan, Wang Jia-Jung
IEEE Trans Biomed Eng. 2015 Sep;62(9):2151-7. doi: 10.1109/TBME.2015.2412136. Epub 2015 Mar 19.
The goal of this study is to present a modified pulse contour method to estimate the stroke volume (SV) based on an oscillometric sphygmomanometer.
The pulse contour was extracted from the pulse signal of the cuff pressure. The characteristics of the brachial artery, as well as the compliance ( C(artery)) and time constant τ of the Windkessel model, could be determined and used to estimate the SV once the apparatus finished the blood pressure measurement.
Assessments of the SV by echocardiography and our method were carried out in 55 subjects. The change in the brachial arterial volume obtained by our method was significantly correlated with that of the two-dimensional ultrasound method (r(v) = 0.871). The estimated SV values by our method for male and female groups, SV(estimate), were also significantly correlated with the echocardiography results, SV(ref) (r(male) = 0.680, r(female) = 0.706 ). The Bland-Altman plot showed agreement between SV(ref) and SV(estimate), with all data points contained within the limits of agreement (± 2 SD). The mean difference and standard deviation (mean ± SD) were 0.101 ± 14.880 ml and 0.650 ± 11.990 ml for the male and female groups, respectively.
The blood pressure, SV, and cardiac output were measured simultaneously, making our method well suited for home use.
Our method was embedded in an oscillometric sphygmomanometer.
本研究的目的是提出一种基于示波血压计的改良脉搏轮廓法来估计每搏输出量（SV）。
从袖带压力的脉搏信号中提取脉搏轮廓。一旦该装置完成血压测量，就可以确定肱动脉的特征以及Windkessel模型的顺应性（C（动脉））和时间常数τ，并用于估计每搏输出量。
对55名受试者进行了超声心动图和我们的方法对每搏输出量的评估。我们的方法获得的肱动脉容积变化与二维超声方法的变化显著相关（r（v）=0.871）。我们的方法对男性和女性组估计的每搏输出量值SV（估计值）也与超声心动图结果SV（参考值）显著相关（r（男性）=0.680，r（女性）=0.706）。Bland-Altman图显示SV（参考值）和SV（估计值）之间具有一致性，所有数据点均包含在一致性界限（±2 SD）内。男性和女性组的平均差异和标准差（平均值±标准差）分别为0.101±14.880 ml和0.650±11.990 ml。
可同时测量血压、每搏输出量和心输出量，使我们的方法非常适合家庭使用。
我们的方法嵌入在示波血压计中。
