Hickey M, Samuels N, Randive N, Langford R, Kyriacou P A
School of Engineering and Mathematical Sciences, City University, London, UK.
Annu Int Conf IEEE Eng Med Biol Soc. 2010;2010:1020-3. doi: 10.1109/IEMBS.2010.5627751.
In an attempt to overcome the limitations of current techniques for monitoring abdominal organ perfusion, a prototype reflectance fiber optic photoplethysmographic (PPG) sensor and processing system was evaluated on seventeen anaesthetized patients undergoing laparotomy. Good quality PPG signals were obtained from the large bowel, small bowel, liver and stomach. Simultaneous PPG signals from the finger were also obtained for comparison purposes using an identical fiber optic sensor. Analysis of the mean ac and dc PPG amplitudes of all acquired signals indicated larger amplitudes for those signals obtained from abdominal organs than those obtained from the finger. Mean estimated blood oxygen saturation (SpO(2)) values from all abdominal sites showed good agreement with those obtained from the finger using both the finger fiber optic sensor and a commercial finger pulse oximeter. Furthermore, a Bland and Altman between-method-differences analysis on the estimated SpO(2) data suggests that a fiber optic abdominal sensor may be a suitable method for the evaluation of abdominal organ perfusion.
为了克服当前监测腹部器官灌注技术的局限性，对17例接受剖腹手术的麻醉患者进行了反射式光纤光电容积脉搏波描记法（PPG）传感器及处理系统原型的评估。从大肠、小肠、肝脏和胃部获得了高质量的PPG信号。还使用相同的光纤传感器同时采集了手指的PPG信号用于比较。对所有采集信号的平均交流和直流PPG幅度分析表明，从腹部器官获得的信号幅度大于从手指获得的信号幅度。所有腹部部位的平均估计血氧饱和度（SpO₂）值与使用手指光纤传感器和商用手指脉搏血氧仪从手指获得的值显示出良好的一致性。此外，对估计的SpO₂数据进行的布兰德-奥特曼方法间差异分析表明，光纤腹部传感器可能是评估腹部器官灌注的一种合适方法。
