PMID: 9633497Jun 20, 1998Paper

Physical and mechanical properties of ePTFE stretch vascular grafts determined by time-resolved scanning acoustic microscopy

European Journal of Vascular and Endovascular Surgery : the Official Journal of the European Society for Vascular Surgery
C S Jørgensen, W P Paaske

Abstract

Determination of physical and mechanical characteristics and properties of thin-walled (0.39 mm) expanded polytetrafluoroethylene stretch vascular prostheses by time-resolved scanning acoustic microscopy (TR-SAM). Samples of Stretch Gore-Tex were mounted on polymethylmethaacrylate substrate, and ethyl alcohol was used as acoustic couplant. A 10 MHz ultrasound transducer mounted on a SAM50 scanning acoustic microscope generated short, pulsed sound waves. Reflected signals were used for imaging and for computer analysis of time resolved wave forms acquired by a digital sampling oscilloscope to calculate physical and mechanical characteristics of the material. Graft wall thickness: 0.395 (0.352/0.401) mm; graft wall sound wave penetration velocity: 1111 (1083/1129) ms-1; acoustic impedance: 3.685 (2.975/4.370) 10(6) kg m-3s-1; attenuation coefficient: 0.144 (0.096/0.229) dB mm-1 MHz-1; material density: 3360 (2712/3982) kg m-3; elastic stiffness: 4.06 (3.35/4.83) GPa (median and (25/75) percentiles; n = 8 samples, 10 measurements spaced 100 microns apart in each sample). TR-SAM can effectively quantify ePTFE graft wall properties, and new data on graft properties have been provided. The acoustic impedance and elastic stiffness of ...Continue Reading

References

Jan 1, 1988·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·A MeunierL Sedel
Sep 1, 1995·Annals of Vascular Surgery·L S ErdoesG C Hunter
Feb 1, 1996·European Journal of Vascular and Endovascular Surgery : the Official Journal of the European Society for Vascular Surgery·C R MohanJ D Corson

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Citations

Aug 1, 2008·Kidney International·Li LiAlfred K Cheung
Sep 22, 2009·The Annals of Thoracic Surgery·Andras C KollarRaleigh F Johnson
Jun 2, 2018·Advanced Healthcare Materials·Alexander M Stahl, Yunzhi Peter Yang
Aug 14, 2018·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Sebastião van UdenStefania A Riboldi
Sep 11, 2020·The Journal of Cardiovascular Surgery·Jeremy AntonyshynJ Paul Santerre

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