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首页> 外文期刊>Radiology >Normal renal artery spectral Doppler waveform: a closer look.
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Normal renal artery spectral Doppler waveform: a closer look.

机译：正常的肾动脉频谱多普勒波形：仔细观察。

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摘要

PURPOSE: To characterize the spectral Doppler tracing of the normal renal artery. MATERIALS AND METHODS: Doppler tracings were obtained from a phantom of a vessel with variable compliance and from the kidneys of 15 healthy volunteers. RESULTS: In the phantom, vascular compliance had the following effects on systolic flow velocity patterns: low compliance, little change in the sharp appearance of the systolic component of the transmitted pulse; mildly increased compliance, down-stream dampening of early systolic acceleration (ESA) with the appearance of a sharp early systolic transmitted peak and of a more rounded late systolic compliance peak; high compliance, delayed and diminished transmitted peak that eventually disappeared within the enlarging down-stream compliance peak. Healthy subjects with compliant vessels had greater ESA and more frequently visualized early systolic peaks in the renal hilum than in the renal sinus. CONCLUSION: Absence of a discrete early systolic peak is a normal finding in young patients, especially in the more distal interlobar arteries. Loss of the early systolic peak may be explained on the basis of vascular compliance.
机译：目的：表征正常肾动脉的频谱多普勒描记。材料与方法：多普勒示踪图是从具有不同依从性的血管体模和15位健康志愿者的肾脏中获得的。结果：在幻象中，血管顺应性对收缩期流速模式具有以下影响：顺应性低，传输脉冲的收缩期成分的尖锐外观变化不大;适度增加顺应性，对早期收缩加速（ESA）的下游抑制，并出现尖锐的早期收缩传递峰值和较圆润的晚期收缩顺应性峰值;高遵从性，传输峰值的延迟和减少，最终在扩大的下游遵从性峰值内消失。具有顺应性血管的健康受试者与肾脏窦相比，肾门中的ESA更高，并且在肾门中更频繁地看到早期收缩高峰。结论：在年轻患者中，尤其是在较远端的叶间动脉中，不存在离散的早期收缩峰是正常现象。可以根据血管顺应性解释早期收缩峰值的丧失。

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