Powell M R, Thoma W, Fust H D, Cabarrou P
Undersea Biomed Res. 1983 Sep;10(3):217-24.
Subjects in 150 man-dives were precordially monitored with a 5-MHz Doppler ultrasound bubble detector. These measurements were made during a series of dives conducted to test decompression tables that utilize changes of breathing mixtures and a time-average PIO2 of 1.9 b during the entire decompression period. Precordially detected bubbles at depth were predictive for limb pain in divers approximately 50% of the time; however, 70% of the divers encountered bends problems in the absence of precordially detectable bubbles. Thus, while the presence of venous return bubbles can be associated with a risk factor for bends, the Doppler method appears to lack the specificity needed for personal dive monitoring. During the oxygen-breathing portions of the decompression individual bubbles could not be detected precordially. The amplitude of the Doppler-detected pulmonary artery flow sound increased, however, and possibly indicated the presence of numerous microbubbles.
对150名男性潜水者在潜水过程中使用5兆赫多普勒超声气泡探测器进行心前区监测。这些测量是在一系列潜水过程中进行的，目的是测试减压表，该减压表利用呼吸混合气的变化以及在整个减压期间平均动脉血氧分压为1.9巴。在深度处心前区检测到的气泡大约50%的时间可预测潜水者的肢体疼痛；然而，70%的潜水者在没有心前区可检测到气泡的情况下出现减压病问题。因此，虽然静脉回流气泡的存在可能与减压病的危险因素有关，但多普勒方法似乎缺乏个人潜水监测所需的特异性。在减压的吸氧阶段，无法在心前区检测到单个气泡。然而，多普勒检测到的肺动脉血流声音的振幅增加，可能表明存在大量微气泡。
