Authors:
Marcel Młyńczak
1
;
Marek Żyliński
1
;
Wiktor Niewiadomski
2
and
Gerard Cybulski
1
;
2
Affiliations:
1
Warsaw University of Technology, Poland
;
2
Polish Academy of Sciences, Poland
Keyword(s):
Ambulatory Monitoring, Impedance Pneumography, Cardiorespiratory Activity, Motion, Pulse Oximetry.
Abstract:
Holter-type devices with sets of sensors, enabling long-term measurement of quantitative respiratory parameters,
were designed and constructed. Pneumonitor 2 was intended for physiologic and athletic applications, and
Pneumonitor 3 for sleep studies. Both allow simultaneous, comfortable, ambulatory monitoring of cardiorespiratory
activity, such as ECG, impedance pneumography (IP), and motion; the second device also allows pulse
oximetry and uses improved setting with combined receiving ECG and IP electrodes. Preliminary results
showed that our prototypes provide signals reliable to monitor heart and breathing activity quantitatively. We
tested the devices in different conditions, including walking, stair-climbing, cycle ergometer training, natural
daily activity, and sleep. They can quantitatively measure respiratory flows, volumes, and minute ventilation
using IP after calibration. They are also able to estimate tachogram from ECG. They allow the detection of
subject activity and bo
dy position via accelerometer and gyroscope, which is helpful during IP calibration
and interpretation. Pneumonitor 3 also enables measurement of blood saturation with a pulse wave (pulse
oximetry).
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