脑静脉血流动力学检测

Detection of Cerebrovenous Hemodynamics

采用２．０ＭＨｚ探头对１６０例１７～７９岁（４８．５±１１．８岁）声窗（颞窗、枕窗）较好的健康自愿者和无中枢神经系统疾病的就诊者进行脑静脉Ｄｏｐｐｌｅｒ超声测定。与ＭＣＡ平行背离探头的低搏动静脉信号即为大脑深中静脉（ｄｅｅｐｍｉｄｄｌｅｃｅｒｅｂｒａｌｖｅｉｎ，ＤＭＣＶ），背离探头的重叠于ＰＣＡ之Ｐ２段的静脉信号为基底静脉（ｂａｓａｌｖｅｉｎｏｆＲｏｓｅｎｔｈａｌ，ＢＶＲ），直窦是朝向探头的静脉信号，其平均血流速度分别为９．１±２．９ｃｍ／ｓ，９．２±２．７ｃｍ／ｓ，１２．９±５．６ｃｍ／ｓ，其检出率分别为８８．３％，９９．９％，９９．９％。我们的结果进一步显示了ＴＣＤ检测脑静脉的能力，方法可靠易行，且具有无创可重复性。

Cerebrovenous Doppler was performed with a range gated 2.0 MHz transducer in 160 healthy volunteers and patients without central nervous disorders ranging in age from 17 to 79 years ( 48.5 ±11.8 years). A venous signal away from the probe and paralleling the middle cerebral artery was interpreted as corresponding to the deep middle cerebral vein(DMCV), a venous signal away from the probe and adjacent to the posterior cerebral artery was considered to correspond to the basal vein of Rosenthal (BVR). The straight sinus signal was detected through an occipital window, the flow direction was toward the probe. The mean flow velocity(Vmax) of the three venous signals was 9.1±2.9 cm/s, 9.2 ±2.7 cm/s, 12.9±5.7 cm/s, and the percent of signals were found in 88.3%, 99.9%,99.9% respectively. We have shown that TCD is valuable to detect the deep cerebral veins. It may provide a rapid, reliable, noninvasive, and low priced technique for cerebral venous hemodynamics examination and evolution.