Gaudiani V A, Shemin R J, Syracuse D C, Henry W L, Conkle D M
J Thorac Cardiovasc Surg. 1978 Jul;76(1):64-9.
An ultrasound transducer which is sutured to the heart at operation and removal percutaneously has been developed and tested in 20 animals. The potential of this device to monitor cardiac function was measured by simultaneously recording 67 left ventricular angiograms and echograms over a wide range of hemodynamic function. In addition, the reproducibility of the data obtained from the transducer and the safety of application and withdrawal were examined. We found highly significant (p less than 0.005) linear correlation between echocardiographic and angiographic measurements of left ventricular end-diastolic volume, end-systolic volume, and ejection fraction. This transducer may provide the means to assess left ventricular size and ejection fraction continuously after cardiac operations in man.
一种在手术时缝合于心脏并可经皮取出的超声换能器已研制成功，并在20只动物身上进行了测试。通过在广泛的血流动力学功能范围内同时记录67次左心室血管造影和超声心动图，测量了该装置监测心脏功能的潜力。此外，还检查了从换能器获得的数据的可重复性以及应用和取出的安全性。我们发现，超声心动图和血管造影测量的左心室舒张末期容积、收缩末期容积和射血分数之间存在高度显著（p<0.005）的线性相关性。这种换能器可能为评估人类心脏手术后左心室大小和射血分数提供连续的手段。
