Berlin 2012 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 38: Focus: Rheology II (joint focus with DRG)

CPP 38.2: Vortrag

Freitag, 30. März 2012, 10:00–10:15, C 130

Rheological and (di)electric measurements on biopolymers, like blood systems — •Angelika Bender, Ulrich Förter-Barth, and Prof. Peter Eyerer — Fraunhofer Institute for Chemical Technology ICT, Pfinztal, Germany

In medical devices, like stents, being implanted into human body or dialysis apparatus transporting human blood, it is important to prevent clot formation. We have developed a method for detecting and monitoring blood coagulation and clot formation, said method enabling immediate intervention for clot destroying.

For the purpose of verification of (di)electric effects known for Naphtalin, water and polymers, oscillatory rheological measurements on coagulating blood have been combined with parallel electric measurement by means of an electrometer triggered by rheometer software as well as with parallel dielectric measurements.

Coagulation of blood being a viscoelastic liquid can be monitored by rheological measurements. Coagulation of blood as a biopolymer comprises formation of a haemostatic clot of fibrin. The measured electric signal coincide with curves characterising the coagulation of the blood probe, storage modulus for rheological measurements, and indicates start, progress and end of coagulation of the blood probe.