Research Papers: Sensing

Photoplethysmographic measurements from the esophagus using a new fiber-optic reflectance sensor

[+] Author Affiliations
Justin P. Phillips, Panayiotis A. Kyriacou, Deric P. Jones

City University London, School of Engineering and Mathematical Sciences, Northampton Square, London, EC1V 0HB, United Kingdom

Richard M. Langford, Serene H. Chang

Saint Bartholomew's Hospital, Barts and The London NHS Trust, Anaesthetic Laboratory and Department, London, EC1A 7BE, United Kingdom

J. Biomed. Opt. 16(7), 077005 (July 18, 2011). doi:10.1117/1.3598858
History: Received February 03, 2011; Revised May 03, 2011; Accepted May 19, 2011; Published July 18, 2011; Online July 18, 2011
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A prototype fiber-optic reflectance-mode pulse oximetry sensor and measurement system is developed for the purposes of estimating arterial oxygen saturation in the esophagus. A dedicated probe containing miniature right-angled glass prisms coupled to light sources and a photodetector by means of optical fibers is designed and used to record photoplethysmographic (PPG) signals from the esophageal epithelium in anesthetized patients. The probe is inserted simply by an anesthesiologist in all cases, and signals are recorded successfully in all but one of 20 subjects, demonstrating that esophageal PPG signals can be reliably obtained. The mean value of the oxygen saturation recorded from the esophagus for all subjects is 94.0 ± 4.0%. These results demonstrate that SpO2 may be estimated in the esophagus using a fiber-optic probe.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Justin P. Phillips ; Richard M. Langford ; Serene H. Chang ; Panayiotis A. Kyriacou and Deric P. Jones
"Photoplethysmographic measurements from the esophagus using a new fiber-optic reflectance sensor", J. Biomed. Opt. 16(7), 077005 (July 18, 2011). ; http://dx.doi.org/10.1117/1.3598858


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