To observe influence of respiration on hemodynamics and interventricular septal ( ivs ) motion in patients with pericardial effusion ( pe ) with echocardiography and to provide theoretical basis for its clinical application 观察心包积液患者胸压变化时心内各瓣口血流速度变化及室间隔运动情况，为临床无创定量心包填塞严重程度提供依据； 4
2 . respiratory variation index ( rvi ) in normal man pulsed - wave doppler spectra of the four cardiac valves were recorded and compared with sequoia 512 and acuson 128 xp / 10 in 79 normal subjects aged 18 to 70 years 正常人rvi值范围的测定79名健康志愿者，采用sequoia512和acuson128xp 10彩色电脑声像仪，记录各瓣口血流速度、同步心电图和呼吸曲线。
Methods : in 45 cases ( 50 lower limbs ) with differernt clinical stages of venous incompetence of lower extremities , the number , diameter and blood flow velocity of pvs were examined by color doppler ultrasound 方法：用彩色多普勒超声检查下肢静脉功能不全患者45例50条下肢的小腿交通静脉的数目、部位、内径及血流速度，并分别与患者的临床表现分级进行相关性分析。
Conclusion : in conclusion , af adversely affects cerebral circulation leading to hemodynamic blood flow disturbances that might result in changes in mv values of the mcas but which are usually insufficient to develop clinical symptoms of brain ischemia 结论：心房纤颤可改变大脑中动脉的平均血流速度，对脑部的血流动力学产生不良影响，但还不足以产生脑缺血的临床症状。
We have applied this system in the research of microcirculatory disturbance , and have got some very useful information of the change in microvascular . these information help us to grasp the physiology metamorphose of sd - rat in this status , at the same time these information can assist us to screen some medicine 此系统应用于微循环障碍实验中，得到了血流速度的变化情况，很好的反映了大鼠生理变化的情况，同时在药物的筛选中有一定的指导意义。
Results the doppler spectrum of the combined motion of the chamber and the fluid was the vector sum of their doppler signals . conclusion cardiac motion alters the doppler signal derived from blood flow and this effect should be considered in the doppler flow velocity measurement 结论通常所谓的血流速度频谱实际上是血细胞在心脏内流动速度和心脏运动速度的矢量和，即两项运动的复合频谱，所以，为减少误差，在用多普勒血流速度频谱测定血流参数时，应考虑校正问题。
In our research , marked autologous fluorescent blood red cell is immitted into sd - rat body and the whole process is shown and recorded by microscope image system . after these processes , we can replay the recorded tape and sample images with video image card . then , we use sequence image processing to analysis the image of dark ground microscope 利用做过荧光标记的自身红细胞注入sd大鼠体内，通过显微图象系统将整个过程以视频信号的形式存贮，然后利用基于视频图象的采集卡，将流速变化过程回放采样，得到暗视场下的荧光图象，利用图象分析和处理的方法，测定血流速度。
At the same time width and blood flow velocity of liver artery in port of liver , width and blood flow velocity of portae vein , the number of blood cells in circulation had been measured . results after liver transplant , the volume of spleen decreased , the mean blood flow velocity of spleen vein and the number of blood cells in circulation increased 方法应用彩色多普勒超声测量术前及术后第1 、 2及4周35例肝硬化合并脾亢病人脾脏的长径、厚径及脾门静脉管径、平均血流速度及峰值血流速度等并进行比较。
