Boccalon H, Reggi M, Lozes A, Canal C, Jausseran J M, Courbier R, Puel P, Enjalbert A
J Mal Vasc. 1981;6(1):55-9.
Arterial stenoses of moderate extent may involve modifications of the blood flow. Arterial shading is not always examined at the best incident angle to assess the extent of the stenosis. Spectral frequency analysis by Doppler examination is a good means of evaluating the effect of moderate arterial lesions. The present study was carried out with a Doppler effect having an acoustic spectrum, which is shown in a histogram having 16 frequency bands. The values were recorded on the two femoral arteries. A study was also made of 49 normal subjects so as to establish a normal envelope histogram, taking into account the following parameters: maximum peak (800 Hz), low cut-off frequency (420 Hz), high cut-off frequency (2,600 Hz); the first peak was found to be present in 81 % of the subjects (at 375 Hz) and the second peak in 75 % of the subjects (2,020 Hz). Thirteen patients with iliac lesions of different extent were included in the study; details of these lesions were established in all cases by aortography. None of the recorded frequency histograms were located within the normal envelope. Two cases of moderate iliac stenoses were noted ( Less Than 50 % of the diameter) which interfered with the histogram, even though the femoral velocity signal was normal.
中度动脉狭窄可能会影响血流。在评估狭窄程度时，动脉阴影并不总是以最佳入射角进行检查。通过多普勒检查进行频谱频率分析是评估中度动脉病变影响的一种好方法。本研究采用具有声谱的多普勒效应进行，该声谱显示在一个具有16个频段的直方图中。这些值记录在两条股动脉上。还对49名正常受试者进行了研究，以便建立一个正常包络直方图，考虑以下参数：最大峰值（800赫兹）、低截止频率（420赫兹）、高截止频率（2600赫兹）；发现81%的受试者存在第一个峰值（在375赫兹处），75%的受试者存在第二个峰值（2020赫兹）。本研究纳入了13例不同程度髂动脉病变的患者；所有病例的病变细节均通过主动脉造影确定。记录的频率直方图均不在正常包络范围内。发现两例中度髂动脉狭窄（直径小于50%），尽管股动脉速度信号正常，但仍对直方图产生了干扰。
