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

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 opt...

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Bibliographic Details
Published in:Journal of Biomedical Optics 2011-07, Vol.16 (7), p.077005-077005
Main Authors: Phillips, Justin P, Kyriacou, Panayiotis A, Jones, Deric P, Langford, Richard M, Chang, Serene H
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Coronary Artery Bypass
Epithelium
Esophagoscopes
Esophagus
Esophagus - blood supply
Fiber optics
Humans
Middle Aged
Miniature
Optical Fibers
Oximetry - instrumentation
Oximetry - statistics & numerical data
Photoplethysmography - instrumentation
Photoplethysmography - statistics & numerical data
Reflectivity
Reproducibility of Results
Saturation
Sensors
Signal Processing, Computer-Assisted
Young Adult
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Summary: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 SpO may be estimated in the esophagus using a fiber-optic probe.
ISSN:1083-3668
1560-2281
1560-2281
DOI:10.1117/1.3598858