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Related Experiment Videos

The extracorporeal pump filter--saint or sinner?

R Heimbecker, A Robert, F N McKenzie

    The Annals of Thoracic Surgery
    |January 1, 1976
    PubMed
    Summary

    Removing arterial line filters during cardiac surgery significantly improves platelet counts and reduces chest drainage. This intervention may prevent consumptive coagulopathy, leading to better patient outcomes without neurological complications or increased mortality.

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    Area of Science:

    • Cardiovascular Surgery
    • Hematology
    • Biomaterials Science

    Background:

    • Arterial line filters are commonly used in cardiopulmonary bypass circuits.
    • Potential for filters to cause platelet and fibrin destruction, leading to coagulopathy.
    • Previous understanding of filter function under varying flow conditions is limited.

    Purpose of the Study:

    • To investigate the impact of arterial line filters on platelet counts and coagulopathy during cardiac surgery.
    • To evaluate the functional integrity of arterial line filters under cardiotomy line flow conditions.
    • To assess the effect of filter use on postoperative chest drainage, neurological outcomes, and operative mortality.

    Main Methods:

    • Scanning electron microscopy (SEM) to examine filter morphology and deposition.
    • Comparison of outcomes between patients with and without arterial line filters.
    • Analysis of platelet counts, chest drainage, neurological status, and mortality rates.

    Main Results:

    • Arterial line filters showed significant platelet and fibrin deposition, forming a membrane.
    • Filters were well-tolerated and functional under low cardiotomy line flows.
    • Absence of arterial line filters correlated with a 260% improvement in platelet counts and a 170% reduction in chest drainage.
    • No neurological changes were observed in patients without arterial line filters.
    • Operative mortality was 4.8% (5/103 patients) in the absence of arterial line filters.

    Conclusions:

    • Arterial line filters can be a source of significant platelet and fibrin destruction, contributing to consumptive coagulopathy.
    • Eliminating arterial line filters may improve hemostasis and reduce complications in cardiac surgery.
    • Further research is warranted to optimize filter use or explore alternative strategies to mitigate filter-induced coagulopathy.

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