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Går det att mäta blodtryck med fotopletysmografi och bioakustisk sensor i kombination?
Linköping University, Department of Biomedical Engineering.
2004 (Swedish)Independent thesis Basic level (professional degree)Student thesisAlternative title
Is it possible to measure blood pressure with photopletysmography in combination with a bio-acoustic sensor? (English)
Abstract [sv]

The aim of the work was to investigate the possibility to combine information from PPG and bio-acoustic technology to extract information that is related to the blood pressure. The measurements have been carried out with several different configurations. First the relation between arterial sounds and the PPG-signal was studied. After those measurements with both PPG and the bio- acoustic technique was concluded on people in different positions and after riding a bike. The goal was to vary the blood pressure. The conclusion that can be drawn in this report is that the bio-acoustic and the PPG-signal in peripheral arteries have the same source. That implies that arterial sounds are a product of turbulence when the pulse wave passes by. Further it can be assumed that it is the first heart sound that is represented in the arterial sounds. The time before and after the arterial sound in one heart cycle vary whit the blood pressure. There relationship seems also to vary with the bloodpressure but it vary differently under different conditions.

Place, publisher, year, edition, pages
Institutionen för medicinsk teknik , 2004.
Keyword [en]
Physiology, Pulse wave velocity, Photopletysmography, Bio-acoustic, Blood pressure, PWV, PPG
Keyword [sv]
National Category
URN: urn:nbn:se:liu:diva-2819ISRN: LITH-IMT/FMT10-EX--04/375--SEOAI: diva2:20161
Available from: 2005-03-10 Created: 2005-03-10

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