Development of Neonatal peripheral circulation monitor

方法：应用激光多普勒血流仪采集新生儿皮肤血流波形。计算每个波形的最大斜率值（Smax）。结果：对照组生命体征平稳，平均Smax为1.71（V/s）。在一个早产儿（胎龄：25周，出生体重：927克）患有动脉导管未闭，并在第25天接受了夹闭手术，我们获得了4个时间序列样本。Smax值分别为2.0（第17天）、3.7（第20天）、4.6（第24天;手术前一天）、1.4（第26天;手术后第二天）。结论：激光多普勒血流计可直观显示毛细血管阻力。

Methods: Skin blood flow waveforms of neonates were acquired with laser doppler flowmeter. Maximum slope value of each waveform (Smax) was calculated. Results: In control group with stable vital signs, mean Smax was 1.71 (V/s). In a premature baby (gestational age: 25 weeks, birth weight: 927 g) who suffered patent ductus arteriosus and underwent clipping operation on day 25, we acquired 4 time-series samples. The Smax values were 2.0 (day 17), 3.7 (day 20), 4.6 (day 24; the day before operation), 1.4 (day 26; the next day of the operation). Conclusion: We visualized the vascular resistance of capillary vessels with laser doppler flowmeter.