Phillips Justin P, Langford Richard M, Chang Serene H, Maney Kishore, Kyriacou Panayiotis A, Jones Deric P
School of Engineering and Mathematical Sciences, City University, London, EC1V 0HB, UK.
Annu Int Conf IEEE Eng Med Biol Soc. 2009;2009:1509-12. doi: 10.1109/IEMBS.2009.5334160.
A dual-wavelength fiber-optic pulse oximetry system was developed for the purposes of estimating oxygen saturation from the esophagus. A probe containing miniature right-angled glass prisms was used to record photoplethysmographic (PPG) signals from the esophageal wall. Signals were recorded successfully in 19 of 20 patients, demonstrating that PPG signals could be reliably obtained from an internal vascularized tissue site such as the esophageal epithelium. The value of the mean oxygen saturation recorded from the esophagus was 94.0 +/- 4.0%. These results demonstrate that SpO(2) may be estimated in the esophagus using a fiber-optic probe and this may be the first report of such measurements.
为了从食管估计氧饱和度，开发了一种双波长光纤脉搏血氧测定系统。使用包含微型直角玻璃棱镜的探头记录来自食管壁的光电容积脉搏波（PPG）信号。20例患者中有19例成功记录到信号，表明可以从诸如食管上皮等内部血管化组织部位可靠地获取PPG信号。从食管记录的平均氧饱和度值为94.0±4.0%。这些结果表明，使用光纤探头可以在食管中估计SpO₂，这可能是此类测量的首次报告。
