IMPROVEMENT OF NON-INVASIVE DIAGNOSTIC METHOD FOR DISFUNCTIONS OF HEART, LIVER AND KIDNEY BY HEMODYNAMIC ANALYSIS USING DOPPLER ULTRASONOGRAPHY IN DOGS.

本研究旨在应用多普勒超声技术研究犬心、肝、肾的血流动力学与病理生理的关系，并建立心、肝、肾功能障碍的无创性诊断方法。二维、经食管和连续波多普勒超声心动图是评价犬心功能的有效无创性诊断方法。多普勒超声提供了关于肝脏和胆道系统的补充功能信息，这可能有助于减少对诸如剖腹手术或腹腔镜手术等侵入性手术的需要，并且也可能是评估可能影响肝功能的门静脉血流变化的有用工具。在肾功能方面，多普勒是一种准确、无创的肾血流测量技术。综合评价各参数对犬肾脏疾病的诊断具有重要意义，多普勒超声可实时评价肾脏血流动力学，无创评价器官血流动力学为犬心、肝、肾功能的评价提供了新的诊断技术。

The purposes of this study were to investigate the relationship of hemodynamics of the heart, liver or kidney and their pathophysiology using Doppler ultrasonography, and to establish non-invasive diagnosis of the disfunction of these organs in dogs.Two-dimentional, transesophageal Doppler and continuous-wave Doppler echocardiographies were considerded useful non-invasive diagnostic methods for the estimation of canine cardiac function. Doppler ultrasound provided complemental functional information about the liver and the bilary system which may help minimize the need for invarsive procedures such as laparotomy or laparoscopy, and also might be a useful tool for evaluating changes in the portal blood flow which may affect liver function. On kidney function, Doppler is a significantly accuraye, non-invarsive technique for mesuring renal blood flow in dogs. It is important to evaluate each parameter comprehensively for application in the the diagnosis of canine renal diseases, and it was posible to evaluate renal hemodynamics in real-time using the Doppler method.In conclusion, the non-invarsive evaluation of organ hemodynamics by the Doppler ultrasonography offers a new diagnostic technique for the evaluation of canine cardiac, liver and renal functions.