Intraoperative monitoring of intestinal viability: Evaluation of a new combined sensor

A dual wavelength photoplethysmography (PPG) and laser Doppler flowmetry (LDF) sensor was developed to investigate the suitability of these techniques for monitoring bowel viability intraoperatively. Clinical measurements were obtained from thirty patients undergoing bowel surgery. Three measurement...

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Published in2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) Vol. 2015; pp. 5126 - 5129
Main Authors McGuinness-Abdollahi, Zahra, Thaha, Mohamed A., Ramsanahie, Anthony, Ahmed, Shafi, Kyriacou, Panayiotis A., Phillips, Justin P.
Format Conference Proceeding Journal Article
LanguageEnglish
Published United States IEEE 01.01.2015
Subjects
Adult
Aged
Aged, 80 and over
Anastomosis, Surgical
Blood flow
Cancer
Digestive System Surgical Procedures - adverse effects
Digestive System Surgical Procedures - methods
Doppler effect
Equipment Design
Humans
Intestines - blood supply
Intestines - surgery
Laser-Doppler Flowmetry - instrumentation
Laser-Doppler Flowmetry - methods
Middle Aged
Monitoring
Monitoring, Intraoperative - instrumentation
Monitoring, Intraoperative - methods
Photoplethysmography - instrumentation
Photoplethysmography - methods
Probes
Prospective Studies
Surgery
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Summary:A dual wavelength photoplethysmography (PPG) and laser Doppler flowmetry (LDF) sensor was developed to investigate the suitability of these techniques for monitoring bowel viability intraoperatively. Clinical measurements were obtained from thirty patients undergoing bowel surgery. Three measurements were performed at different stages of the operation. The amplitude of infrared PPG decreased from the baseline measurement to the pre-anastomosis measurement by 36% and LDF flux decreased by 21% for the same measurements. An increase of 33% in amplitude for infrared PPG was observed from the pre-anastomotic to post-anastomosis measurement; the equivalent increase was not seen for LDF flux. The results revealed that the sensor could potentially indicate changes in perfusion and blood flow at critical phases of surgery, thereby assisting in the early detection of inadequate blood supply in bowel tissue. The results also suggest that laser Doppler is more sensitive to movement artefact compared to PPG.
ISSN:1094-687X
1557-170X
1558-4615
DOI:10.1109/EMBC.2015.7319545