Continuous blood pressure estimation using pulse arrival time and photoplethysmogram

Pulse arrival time and the amplitude of the finger photoplethysmogram were used to track continuous systolic blood pressure over 10-minute intervals. The measures were recorded with a holter-oximeter from a sample of 8 young, healthy human subjects in the supine and standing positions. Results show that, with individual calibration, systolic blood pressure can be estimated with an average error of ±5 mmHg. Using pulse arrival time in combination with the amplitude of the finger photoplethysmogram gave better results than using any one alone