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Respiratory Effort Monitoring Using Pulse Transit Time in Human  

정동근 (동아대학교 의과대학 의공학교실)
Publication Information
Journal of Biomedical Engineering Research / v.23, no.6, 2002 , pp. 485-489 More about this Journal
Abstract
In this study. respiratory efforts were monitored by the change of pulse transit time (PTT) which is related with the arterial pressure PTT is the time interval between the peak of R wave in ECG and the maximal slope point of photoplethysmogram(PPG). Biosignals, ECG and finger photoplethysmogram(PPG), were converted to digital data, and PTT was evaluated in personal computer with every heart beat. Results were presented as a graph using spline interpolation. The software was implemented in C$\^$++/ as a window-based application program. PTT was periodically changed according to airflow in resting respiration. In the resting respiration, PTT was changed according to the respiratory cycle. The amplitude of PTT fluctuation was increased by deep respiration, and increased by partial airway obstruction. These results suggest that PTT is responsible to respiratory effort which could be evaluated by the pattern of PTT change. And it is expected that PTT could be applied in the monitoring of respiratory effort by noninvasive methods, and is very useful method for the evaluation of respiratory distress.
Keywords
Pulse transit time (PTT); Respiratory effort; Respiratory distress;
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Times Cited By KSCI : 1  (Citation Analysis)
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