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Related Experiment Videos

Surface spectroscopic studies of Avcothane

S W Graham, D M Hercules

    Journal of Biomedical Materials Research
    |May 1, 1981
    PubMed
    Summary

    Surface analysis of Avcothane aortic balloon pumps revealed a fluorine-rich layer, primarily on the interior surfaces. This finding suggests a potential deposition during manufacturing or sterilization processes.

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    Area of Science:

    • Biomaterials Science
    • Polymer Chemistry
    • Surface Analysis

    Background:

    • Avcothane, a polyether-polyurethane-polydimethylsiloxane copolymer, is widely used in aortic balloon pumps.
    • Aortic balloon pumps are critical medical devices requiring robust and well-characterized materials.

    Purpose of the Study:

    • To characterize the internal and external surfaces of Avcothane aortic balloon pump sections.
    • To compare surface properties using advanced analytical techniques.
    • To investigate the presence and distribution of specific chemical elements on the Avcothane surface.

    Main Methods:

    • X-ray photoelectron spectroscopy (ESCA)
    • Ion scattering spectroscopy (ISS)
    • Secondary ion mass spectrometry (SIMS)
    • Comparison with previous ESCA and Auger electron spectroscopy (AES) data.

    Main Results:

    • A thin, fluorine-rich film was detected on Avcothane surfaces.
    • Higher fluorine intensity was observed on the interior surfaces of the balloon pump.
    • Exterior surfaces showed less intense fluorine signals compared to the interior.

    Conclusions:

    • The fluorine-rich layer likely originates from a fluorocarbon polymer.
    • Deposition during molding, preparation, or sterilization are potential sources for the observed fluorine layer.
    • Surface characterization is crucial for understanding biomaterial performance in medical devices.

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