liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Force to restore the shape of an asymmetric extracorporeal tube as the basis for non-invasive pressure measurements.
Linköping University, Department of Biomedical Engineering, Physiological Measurements. Linköping University, The Institute of Technology.
2002 (English)In: International Journal of Artificial Organs, ISSN 0391-3988, E-ISSN 1724-6040, Vol. 25, no 4, 281-289 p.Article in journal (Refereed) Published
Abstract [en]

A zero-balance principle is described where intraluminal pressure is estimated from the counter force needed to restore the tube shape of an elastic extra corporeal tube. The aim was to optimise cross-sectional tube geometry for tube expansion due to pressure and to reduce the sensitivity to variation in mechanical tube characteristics using an experimental statistical and factorial design. The main application is pressure monitoring in blood and dialysate tubes during hemodialysis. Improving the monitoring of the dialysis process will reduce complications, such as sudden decreases in systemic blood pressure or occlusion at the artero-venous fistula. The factorial design indicated strong influence from the geometrical characteristics of the tube as well from the geometrical design parameters of the pressure transducer. We found a consistent relationship between the intraluminal pressure and the applied force needed to restore the tube shape. The modified cross-sectional tube geometry enhances measurement sensitivity and facilitates the desired behavior of tubes during pressure applications.

Place, publisher, year, edition, pages
2002. Vol. 25, no 4, 281-289 p.
National Category
Geotechnical Engineering
URN: urn:nbn:se:liu:diva-116911PubMedID: 12027138OAI: diva2:801468
Available from: 2015-04-09 Created: 2015-04-09 Last updated: 2015-04-20

Open Access in DiVA

No full text


Search in DiVA

By author/editor
Ask, Per
By organisation
Physiological MeasurementsThe Institute of Technology
In the same journal
International Journal of Artificial Organs
Geotechnical Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 127 hits
ReferencesLink to record
Permanent link

Direct link