基于超声导管的心输出量测量方法

The method of cardiac output measurement based on ultrasonic catheter

摘要: 提出了一种基于超声导管的心输出量测量方法, 该超声导管具有两种不同中心频率的单振元换能器。使用超声导管、流量泵、体模等组成血流循环回路, 实现了血流速度的检测与肺动脉图像管腔区域的分割, 进而完成了心输出量测量。测量结果与蠕动泵预设流量值的平均相对误差小于2%, 表明超声导管用于心输出量测量是可行的。

Abstract: A method for measuring cardiac output based on ultrasonic catheter is proposed, which has two single vibrator transducers with different center frequencies. Ultrasonic catheter, flow pump and phantom are used to form blood circulation loop. Both the detection of blood flow velocity and the segmentation of lumen region of pulmonary artery image are realized, then the measurement of cardiac output is completed. The average relative error between the measured results and the preset flow value of peristaltic pump is less than 2%, which indicates the feasibility of ultrasonic catheter for cardiac output measurement.