Bernardi L, Licci E, Lumina C, Marni E, Finardi G
G Ital Cardiol. 1984 Oct;14(10):757-61.
The aim of this study was to verify if in the clinical use the relationship between the morphology of the carotid pulse and of the ear densitogram was constant enough to validate the measurement of left ventricular ejection time from the ear densitogram. In 92 subjects, aged 5-84 years, carotid pulse and ear densitogram were simultaneously recorded. The ear densitogram was electronically processed with 3 different filters, in an effort to duplicate the carotid pulse and thus to facilitate the measurements of the ejection time. Mean ejection time was 265.5 +/- 24.87 msec. for carotid pulse, and 265.7 +/- 24.19, 265.2 +/- 24.25, 266.2 +/- 24.78 for the ear densitographic methods. Analysis of variance did not show any differences among the 4 methods. We conclude that quite a constant relationship between carotid pulse and ear densitogram is present in clinical measurements. Thus, the carotid pulse can be reliably substituted by the ear densitogram.
本研究的目的是验证在临床应用中，颈动脉脉搏形态与耳部密度图之间的关系是否足够稳定，以证实通过耳部密度图测量左心室射血时间的有效性。对92名年龄在5至84岁之间的受试者同时记录了颈动脉脉搏和耳部密度图。使用3种不同的滤波器对耳部密度图进行电子处理，试图复制颈动脉脉搏，从而便于测量射血时间。颈动脉脉搏的平均射血时间为265.5±24.87毫秒，耳部密度图测量方法的平均射血时间分别为265.7±24.19、265.2±24.25、266.2±24.78毫秒。方差分析显示这4种方法之间没有任何差异。我们得出结论，在临床测量中，颈动脉脉搏与耳部密度图之间存在相当稳定的关系。因此，耳部密度图可以可靠地替代颈动脉脉搏。
