Electro-optical techniques for the investigation of photoplethysmographic signals in human abdominal organs

Kyriacou, P. A., Crerar-Gilbert, A., Langford, R. M. & Jones, D. P. (2006). Electro-optical techniques for the investigation of photoplethysmographic signals in human abdominal organs. Paper presented at the SECOND INTERNATIONAL CONFERENCE ON OPTICAL AND LASER DIAGNOSTICS, 11-14 Sep 2005, London, UK.

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Abstract

There is a need for reliable continuous monitoring of abdominal organ oxygen saturation (SpO2). Splanchnic ischaemia may ultimately lead to cellular hypoxia and necrosis and may well contribute to the development of multiple organ failures and increased mortality. A new reflectance electro-optical photoplethysmographic (PPG) probe and signal processing system were developed. PPG signals from abdominal organs (bowel, liver, and kidney) and the finger were obtained from 12 anaesthetised patients. The amplitudes of the abdominal organ PPGs were, on average, approximately the same as those obtained simultaneously from the finger. These observations suggest that pulse oximetry may be a valid monitoring technique for abdominal organs such as the bowel liver and kidney.

Item Type: Conference or Workshop Item (Paper)
Subjects: R Medicine > RC Internal medicine
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: School of Engineering & Mathematical Sciences > Engineering
URI: http://openaccess.city.ac.uk/id/eprint/14317

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