70. 超音波ドプラー法による脳動脈瘤手術中の血行動態に関する検討

概要

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The doppler ultrasound has been recorded from the main cerebral arteries and fundus of the aneurysm to investigate the hemodynamics in each site during aneurysm surgery. The doppler sound was analyzed by two methods; (1) power spectrogram analysis with a data processor, (2) quantitative spectrum analysis with Angioscan II.<BR>The pattern of the power spectrogram obtained from main cerebral artery showed the shape of one peak hill, in which the peak located at the frequency of 500-600 Hz. The doppler sound recorded from the aneurysm demonstrated the characteristic power spectrogram. Namely, the spectrogram exhibited the shape of hill with three peaks, ranging from 100-500 Hz. In the quantitative spectrum analysis, doppler sound from main cerebral arteries demonstrated a characteristic arterial blood flow pattern with systolic notch and high values of % window, more than 40. The doppler sound from aneurysm did not show a characteristic arterial blood flow pattern, and exhibited an evident reduction of peak frequency and low values of % window, lower than 20.<BR>It is suggested that the power spectrogram or quantitative spectrum analysis of doppler ultrasound is a useful method to investigate the hemodynamics in each cerebral vessels during aneurysm surgery.
The Japanese Society on Surgery for Cerebral Strokeの論文