The Effect of Tracheal Intubation on AC and DC Components of a Photoplethysmograph
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ClinicalTrials.gov Identifier: NCT03032939
Recruitment Status :
First Posted : January 26, 2017
Last Update Posted : January 26, 2017
University of California, San Francisco
Information provided by (Responsible Party):
Pekka Talke, University of California, San Francisco
Intraoperative stress responses (vasoconstriction and changes in heart rate) and postoperative pain can be monitored using photoplethysmography (PPG). PPG measures changes in tissue volume noninvasively. Therefore it can measure acute changes in arterial diameter (vasoconstriction). PPG signal has two components, AC and DC. Effects of noxious stimuli-induced stress responses (vasoconstriction) have not been studied on the DC component of PPG. The aim of this study was to investigate the effect of a known noxious stimulus (endotracheal intubation) on both the AC and DC components of PPG.
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Layout table for eligibility information
Ages Eligible for Study:
18 Years and older (Adult, Older Adult)
Sexes Eligible for Study:
Accepts Healthy Volunteers:
Elective, healthy surgical patients over 18 yrs of age