An Adjusted Method of Photoplethysmography Detection in Poor Perfusion

Fu, Xiuquan; Tu, Yuewen; Tang, Yawei; Li, Dingli; Jiang, Kai; Chen, Hang; Ye, Shuming

doi:10.1109/icbbe.2011.5780311

Cited by 2 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By940nm infrared light and 660nm red lightirradiating some parts of human body alternately,such as finger, earlobe and so on, venous blood, skeletal system and tissues keep the absorptioncoefficient as aconstant, corresponding with thedirect current component of photoelectric signals. Arterial pulses will cause the percentage concentration of oxyhemoglobin and reduced hemoglobinchanging periodically, as a result, the absorption of infrared light and red light changes at the same pace, this part corresponding to the alternating current component of photoelectric signals [3]. By applying Lambert Bill theorem, we can calculate blood oxygen saturation through the AC component of photoelectric signals, which fits in with the rhythm of Cardiac impulses.…”

Section: The Photoplethysmography (Ppg)-detecting Principlementioning

confidence: 98%

A Portable and High-Resolution System for Sleep Apnea Monitoring

et al. 2013

AMR

View full text Add to dashboard Cite

As a major indicator of Obstructive Sleep Apnea Syndrome (OSAS) in clinical diagnosis, the monitoring of sleep apnea plays an important role in medical treatments of modern society. This paper proposes a portable sleep apnea monitoring system, which is of high-precision and low-power consumption, and capable of performing the long-term monitoring of OSAS patients multiple physiological parameters in clinical treatments. In the system, the AC modulated detection is adopted, and low amplification ratios are utilized in forestage and a high-resolution AD converter is designed in post-stages. Thus, it is able to acquire, analyze, and process physiological signals in real-time. In addition, ultralow-power chips are used in control system to save the power consumption. The experimental results show that our monitoring system has the strengths of high stability, low-power consumption (peak current90mA), and strong anti-interference ability, which demonstrates the potential in practical applications.

show abstract

Section: The Photoplethysmography (Ppg)-detecting Principlementioning

confidence: 98%