Real-time measurements of coagulation on bacterial cellulose and conventional vascular graft materials.
Journal article, 2010

The search for a functional, small diameter (<5mm) vascular graft has been ongoing for over 30 years, but yet there is no consistently reliable synthetic graft. The primary mechanisms of graft failure are intimal hyperplasia, poor blood flow and surface thrombogenicity. Bacterial cellulose (BC) became therefore a proposed new biosynthetic vascular graft material. Since conventional methods are not suited for coagulation measurements on BC, we have adapted the automated calibrated thrombin generation method for measurements of biomaterial-induced coagulation of BC as compared with clinically used graft materials i.e., expanded poly(tetrafluoroethylene) (ePTFE) and poly(ethyleneterephtalat) (PET). We have also visualized the coagulation propagation at the material surfaces. Thrombin generation experiments revealed dramatic differences between the materials tested. Both ePTFE and BC were found to generate longer lag times and ttpeak values than PET. Most importantly, BC was found to generate the lowest "peak", indicating a slower coagulation process at the surface. These results are also supported by the measurements of factor XIIa generation and analysis of surface coagulation times, which were detected in the following increasing order (mean + or - SD): PET (27 + or - 8 min)

chemistry

Transplants

Humans

Computer Systems

Gluconacetobacter xylinus

methods

Blood Vessel Prosthesis

chemistry

metabolism

physiology

Blood Coagulation

Biocompatible Materials

Materials Testing

Cellulose

Author

Helen Fink

University of Gothenburg

Lars Faxälv

Linköping University

Gábor F Molnár

Semmelweis University

Kristoffer Drotz

Chalmers, Chemical and Biological Engineering, Polymer Technology

Bo Risberg

University of Gothenburg

Tomas L Lindahl

Linköping University

Anders Sellborn

University of Gothenburg

Acta Biomaterialia

1742-7061 (ISSN)

Vol. 6 3 1125-30

Subject Categories

Surgery

MEDICAL AND HEALTH SCIENCES

DOI

10.1016/j.actbio.2009.09.019

PubMed

19800035

More information

Latest update

2/28/2018