Tsaroucha Athanasia, Paraskeva Anteia, Fassoulaki Argyro
National and Kapodistrian University of Athens, Aretaieio Hospital, Department of Anesthesiology, Athens, Greece.
Rom J Anaesth Intensive Care. 2017 Oct;24(2):101-106. doi: 10.21454/rjaic.7518.242.fss.
Regional oxygen saturation (rSO) monitoring of the brain by near-infrared spectroscopy (NIRS) has been mainly used during carotid endarterectomy. The present study was conducted in volunteers and investigates the rSO values of the brain, heart and liver tissue as assessed by NIRS in the supine and the sitting position.
After obtaining written informed consent from forty-nine healthy volunteers, rSO values were recorded in the heart and liver areas in the supine and the sitting position, while simultaneously the rSO values of the brain.
The rSO brain values in the supine and the sitting position were 69 ± 6.0 and 66 ± 6.1 respectively (p = 0.0001). The rSO values in the supine and the sitting position were 76 ± 10.5 and 79 ± 6.7 for the heart (p > 0.05) and 85 ± 6.8 and 82 ± 7.2 for the liver, (p = 0.007). Heart rSO values were higher than the brain rSO values in both the supine (76 ± 10.4 versus 69 ± 6.6; p = 0.0001) and the sitting position (79 ± 6.7 versus 66 ± 6.1; p = 0.0001). The liver rSO values were also higher than the brain rSO2 values in the supine (85 ± 6.8 versus 69 ± 6.0; p = 0.0001) and in the sitting position (82 ± 7.2 versus 66 ± 5.7; p = 0.0001). Arterial blood pressure and arterial oxygen saturation (SpO) did not differ between the two positions but the heart rate was higher in the sitting position (p = 0.030).
We conclude that brain and liver (but not heart) rSO values are higher in the supine than sitting position. Additionally, NIRS may be used to assess oxygenation of the heart and liver.
近红外光谱技术（NIRS）用于监测大脑局部氧饱和度（rSO），主要应用于颈动脉内膜切除术过程中。本研究以志愿者为对象，调查通过NIRS评估的大脑、心脏和肝脏组织在仰卧位和坐位时的rSO值。
在获得49名健康志愿者的书面知情同意后，记录其仰卧位和坐位时心脏和肝脏区域的rSO值，同时记录大脑的rSO值。
仰卧位和坐位时大脑的rSO值分别为69±6.0和66±6.1（p = 0.0001）。仰卧位和坐位时心脏的rSO值分别为76±10.5和79±6.7（p>0.05），肝脏的rSO值分别为85±6.8和82±7.2（p = 0.007）。仰卧位（76±10.4对69±6.6；p = 0.0001）和坐位（79±6.7对66±6.1；p = 0.0001）时，心脏的rSO值均高于大脑的rSO值。仰卧位（85±6.8对69±6.0；p = 0.0001）和坐位（82±7.2对66±5.7；p = 0.0001）时，肝脏的rSO值也高于大脑的rSO2值。两个体位之间动脉血压和动脉血氧饱和度（SpO）无差异，但坐位时心率较高（p = 0.030）。
我们得出结论，仰卧位时大脑和肝脏（而非心脏）的rSO值高于坐位。此外，NIRS可用于评估心脏和肝脏的氧合情况。
