Lee H C, Huang K L, Tsai J D, Wang S H, Mok H K
Department of Diving and Hyperbaric Medicine, Chinese Naval General Hospital, Kaohsiung.
Zhonghua Yi Xue Za Zhi (Taipei). 1992 Nov;50(5):359-64.
Doppler ultrasonic monitoring was used to detect bubbles in sixteen guinea pigs subjected to a simulated air-dive profile of 9 ATA for 25 minutes. After completion of the decompression, eight subjects did not demonstrate any signs of decompression sickness (DCS), two developed paraplegia and six died. Under sedation, the Doppler ultrasonic bubble detector was placed precordially to record the bubble signals in both pre-dive and post-dive. The recorded signals were analyzed with a high resolution signal analyzer to compare changes between pre-dive and post-dive spectrograms. Bubble signals appeared in the frequency range between 0.64 +/- 0.02 KHz and 6.08 +/- 0.30 KHz. In terms of the net spectral level versus frequency areas (difference between pre-dive and post-dive spectrograms), the mean areas in the paraplegia group and the death group were significantly larger than those in the group without DCS. Therefore, we concluded that the spectral analysis may be an objective and quantitative adjunctive method to the interpretation of Doppler bubble signals.
对16只豚鼠进行了多普勒超声监测，使其接受9个绝对大气压（ATA）的模拟空气潜水剖面25分钟，以检测气泡。减压完成后，8只豚鼠未表现出任何减压病（DCS）迹象，2只出现截瘫，6只死亡。在镇静状态下，将多普勒超声气泡探测器置于心前区，记录潜水前和潜水后的气泡信号。用高分辨率信号分析仪对记录的信号进行分析，以比较潜水前和潜水后频谱图的变化。气泡信号出现在0.64±0.02千赫兹至6.08±0.30千赫兹的频率范围内。就净频谱水平与频率面积（潜水前和潜水后频谱图之间的差异）而言，截瘫组和死亡组的平均面积显著大于无减压病组。因此，我们得出结论，频谱分析可能是解释多普勒气泡信号的一种客观、定量的辅助方法。
