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The improved Björk-Shiley tilting disc valve prosthesis

V O Björk

    Scandinavian Journal of Thoracic and Cardiovascular Surgery
    |January 1, 1978
    PubMed
    Summary

    The improved Björk-Shiley valve offers enhanced strength and better blood flow dynamics. Clinical follow-up shows excellent results in patients receiving this advanced heart valve prosthesis.

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    Area of Science:

    • Cardiovascular Surgery
    • Biomedical Engineering
    • Medical Device Design

    Background:

    • The Björk-Shiley valve is a mechanical heart valve prosthesis.
    • Previous designs had limitations in strength and fluid dynamics.
    • Areas of stagnant flow behind the disc could lead to complications.

    Purpose of the Study:

    • To detail the design modifications of the Björk-Shiley valve.
    • To evaluate the hydrodynamic improvements and structural enhancements.
    • To report initial clinical outcomes of the improved valve.

    Main Methods:

    • Structural modifications included integrating the inlet strut and doubling its cross-section.
    • Hydrodynamic improvements were achieved using a convexo-concave disc and downstream pivot.
    • Clinical data from 234 implanted valves were analyzed for up to two years.

    Main Results:

    • The modified valve exhibits increased strength and improved flow dynamics.
    • Flow through the orifice was increased by 40% due to disc repositioning.
    • Excellent clinical results were observed in the initial patient cohort.

    Conclusions:

    • The redesigned Björk-Shiley valve addresses previous limitations effectively.
    • Enhanced structural integrity and superior hemodynamics are key benefits.
    • Early clinical performance suggests a promising advancement in valve technology.

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