| Numéro |
J. Phys. III France
Volume 3, Numéro 6, June 1993
|
|
|---|---|---|
| Page(s) | 1283 - 1289 | |
| DOI | https://doi.org/10.1051/jp3:1993198 | |
J. Phys. III France 3 (1993) 1283-1289
Viscoelastic behaviour of human blood and polyacrylamide model fluids for heart valve testing
Dietmar Lerche1, Georgios Vlastos1, Brigitte Koch1, Manfred Pohl1 and Klaus Affeld21 Inst. Med. Phys. Biophysics, Med. Faculty Charité, Humboldt University, 0-1040 Berlin, Germany
2 Biofluid Lab., Virchow Hospital, Free University, Berlin, Germany
(Received 19 October 1992, revised 21 January 1993, accepted 8 March 1993)
Abstract
New heart valves and other cardiovascular assist systems have to be tested
for hydrodynamic performance. In place of human blood simple model fluids like
glycerol solutions are employed often due to ethical and practical reasons.
But blood exhibits complex non-Newtonian and viscoelastic behaviour. Rheological blood
properties are reviewed based on literature and own experimental results. Furthermore
we studied polymer solutions with respect to blood-like flow behaviour. Rheology was
assessed by means of the low shear rotational viscometer (LS 40, Mettler-Toledo,
Switzerland) under stationary and dynamic shear conditions (variation of frequency
and angular displacement).
© Les Editions de Physique 1993