PL EN


Preferences help
enabled [disable] Abstract
Number of results
2012 | 121 | 1A | A-54-A-56
Article title

Analysis of Complex Viscosity in a Group of Patients with Circulation Disorders

Content
Title variants
Languages of publication
EN
Abstracts
EN
Rheology of viscoelastic fluids is a complex phenomenon. Full blood is an example of a body fluid of non-Newtonian character with pronounced viscoelastic properties. Blood flow in the circulatory system depends not only on the physical and physico-chemical properties of blood but also on the structure and properties of the vascular system. Blood viscosity is one of the most important factor determining the blood flow. Its value depends on the shear rate, hematocrit, erythrocyte aggregability and deformability, and on the plasma viscosity and composition. In the course of the investigation we utilized oscillatory methods, called also dynamic mechanical analysis. The technique principle is based on the measurement of the amplitude and phase of oscillations of the sample subject to a harmonic force with certain amplitude and frequency. The results of dynamic mechanical analysis were used to determine the viscoelastic properties of blood samples. We performed also the standard flow curve measurements of the blood plasma samples, that is shear stress as a function of shear rate in the rotary mode. All measurements were performed by means of a Contraves LS-40 rheometer on blood samples taken from two groups of patients. One group contained patients after heart attack, while the second one - after cerebral infarction. In none of the groups the patients were in an acute state. Information obtained from oscillatory measurements indicate increased erythrocyte aggregability in both groups of patients.
Keywords
Year
Volume
121
Issue
1A
Pages
A-54-A-56
Physical description
Dates
published
2012-01
References
  • [1] Abbreviations of periodica H. Schmid-Schönbein, H. Rieger, T. Fischer, Angiology 31, 301 (1980)
  • [2] L. Dintenfass, Biorheology 27, 149 (1990)
  • [3] D. Lerche, H. Bämler, W. Kucera, W. Meier, M. Paulitschke, in: Physical Characterization of Biological Cells. Basic Research and Clinic Relevance, Eds. W. Scütt, H. Klinkmann, I. Lamprecht, T. Wilson, Verlag Gesundheit GmbH, Berlin 1991, p. 189
  • [4] S. Chien, Science 168, 977 (1970)
  • [5] D. Lerce, G. Vlastos, B. Koch, M. Pohl, K. Affeld, J. Phys. III (France) 3, 1283 (1993)
  • [6] H. Chmiel, I. Anadere, E. Walitza, Biorheology 27, 883 (1990)
  • [7] A. Marcinkowska-Gapińska, F. Jaroszyk, L. Kubisz, in: Sci. Proc. Riga Tech. Univ. Ser. 6, Transport Eng., Riga 2002, p. 159
  • [8] G.B. Thurston, Biophysical J. 12, 1205 (1972)
  • [9] P. Kowal, Neur. Neurochir. Pol. 24, 323 (1990)
  • [10] M. Penco, S. Romano, A. Dagianti Jr., M.G. Tozzi-Ciancarelli, Clin. Hemorheol. Microcir. 22, 153 (2000)
  • [11] F.B. Smith, F.G. Fowkes, A. Rumley, A.J. Lee, Eur. Heart J. 21, 1607 (2000)
  • [12] P. Kowal, A. Marcinkowska-Gapińska, J. Neurol. Sci. 258, 132 (2007)
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv121n1a12kz
Identifiers
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.