Zwiebel W J, Zagzebski J A, Crummy A B, Hirscher M
Stroke. 1982 May-Jun;13(3):386-91. doi: 10.1161/01.str.13.3.386.
The peak Doppler-shifted frequency and degree of lumen narrowing were compared in 75 cervical carotid stenoses. Peak frequency was not found to precisely indicate severity of stenosis, but it was possible to divide stenoses into four ranges of severity on the basis of peak frequency. Peak frequencies of less than 5 KHz, in most instances, indicated stenoses of less than 50% decrease in lumen area. Frequencies from 5 to 8 KHz were generally associated with stenoses of 50-75% decrease in lumen area, and frequencies of 8-12 KHz were most often associated with stenoses of 75-90% decrease in area. Frequencies greater than 12 KHz almost invariably occurred in very severe lesions of greater than 90% decrease in lumen area (greater than 70% decrease in diameter). The use of peak frequency as an indicator of severity of stenosis, while not specific, is felt to be of considerable clinical benefit as it provides a more quantitative evaluation of stenosis than auditory assessment of Doppler frequencies.
对75例颈总动脉狭窄患者的多普勒频移峰值频率和管腔狭窄程度进行了比较。未发现峰值频率能精确指示狭窄的严重程度，但根据峰值频率可将狭窄分为四个严重程度范围。大多数情况下，峰值频率低于5kHz表明管腔面积减少不到50%。5至8kHz的频率通常与管腔面积减少50%-75%的狭窄相关，8至12kHz的频率最常与管腔面积减少75%-90%的狭窄相关。频率高于12kHz几乎总是出现在管腔面积减少超过90%（直径减少超过70%）的非常严重的病变中。将峰值频率用作狭窄严重程度的指标虽然不具有特异性，但因其比多普勒频率的听觉评估能提供更定量的狭窄评估，所以被认为具有相当大的临床益处。
