<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Chronic venous insufficiency of the lower limbs is a disease which is caused by an increased blood pressure inside the veins of the leg and the resulting increase of the contained blood volume. This work focuses on developing a device which uses impedance plethysmography, also known as impedance phlebography, to obtain information about the blood volume in the lower leg and provides the possibility to measure the impedance semi contact-less, e.g. through compression stockings. Furthermore a real-time beat-to-beat interval detection algorithm was implemented. Finally, the function of the developed impedance measuring system and the whole system was verified by comparing it with a gold standard. In comparison to the conductive coupling, the system performed similarly. The analysis showed that the developed system is suitable for semi-capacitive IPG. The algorithm was implemented conservatively since it provided a good false-positive rate of 0 %, but only a moderate sensitivity of about 68 %. Reliable and continuous measurement of the pulse signal was only possible in periods of immobility.</p></abstract>

Chronic venous insufficiency of the lower limbs is a disease which is caused by an increased blood pressure inside the veins of the leg and the resulting increase of the contained blood volume. This work focuses on developing a device which uses impedance plethysmography, also known as impedance phlebography, to obtain information about the blood volume in the lower leg and provides the possibility to measure the impedance semi contact-less, e.g. through compression stockings. Furthermore a real-time beat-to-beat interval detection algorithm was implemented. Finally, the function of the developed impedance measuring system and the whole system was verified by comparing it with a gold standard. In comparison to the conductive coupling, the system performed similarly. The analysis showed that the developed system is suitable for semi-capacitive IPG. The algorithm was implemented conservatively since it provided a good false-positive rate of 0 %, but only a moderate sensitivity of about 68 %. Reliable and continuous measurement of the pulse signal was only possible in periods of immobility.

Development of a real-time, semi-capacitive impedance phlebography device

Journal of Electrical Bioimpedance

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Development of a real-time, semi-capacitive impedance phlebography device"}

Chronic venous insufficiency of the lower limbs is a disease which is caused by an increased blood pressure inside the veins of the leg and the resulting...

Development of a real-time, semi-capacitive impedance phlebography device

Article Category: Articles

Published Online: Apr 03, 2015

Page range: 2 - 9

Received: Oct 14, 2014

DOI: https://doi.org/10.5617/jeb.953

Keywords
chronic venous insufficiency, impedance plethysmography, capacitive measurement, real-time detection algorithm

© 2015 Sören Weyer, Hannes Weber, Christian Kleeberg, Steffen Leonhardt, Tobias Wartzek, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Development of a real-time, semi-capacitive impedance phlebography device

Article Category: Articles

Published Online: Apr 03, 2015

Page range: 2 - 9

Received: Oct 14, 2014

DOI: https://doi.org/10.5617/jeb.953

Keywordschronic venous insufficiency, impedance plethysmography, capacitive measurement, real-time detection algorithm

© 2015 Sören Weyer, Hannes Weber, Christian Kleeberg, Steffen Leonhardt, Tobias Wartzek, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
chronic venous insufficiency, impedance plethysmography, capacitive measurement, real-time detection algorithm