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ICD lead failure detection through high frequency impedance.

Daniel T Kollmann, Charles D Swerdlow, Mark W Kroll

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |January 9, 2015
    PubMed
    Summary
    This summary is machine-generated.

    A new high-frequency impedance method can detect insulation breaches in implantable cardioverter defibrillator leads earlier than current methods. This early detection of lead failure can prevent device malfunction and inappropriate shocks.

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    Area of Science:

    • Biomedical Engineering
    • Medical Device Technology
    • Cardiovascular Devices

    Background:

    • Transvenous implantable cardioverter defibrillator (ICD) leads with silicone bodies are prone to abrasion-induced insulation breaches.
    • Current lead integrity monitoring relies on low-frequency impedance, which only detects complete insulation failure.
    • Incomplete insulation breaches can lead to device malfunction, including failure to deliver shocks or inappropriate shocks.

    Purpose of the Study:

    • To introduce and evaluate a novel method for detecting insulation defects in ICD leads using high-frequency impedance measurements.
    • To assess the efficacy of this new method in identifying insulation failures before complete breach.
    • To specifically evaluate the method's performance on the St. Jude Medical Riata® lead, known for insulation breach issues.

    Main Methods:

    • Development of a lead integrity monitoring method based on high-frequency impedance measurements.
    • Utilizing 3D electromagnetic simulation to model lead behavior and insulation defects.
    • Conducting bench testing to validate the high-frequency impedance method's ability to detect insulation failures.

    Main Results:

    • The high-frequency impedance method demonstrated potential in identifying insulation defects.
    • Simulations and bench tests showed the method's sensitivity to insulation breaches.
    • The St. Jude Medical Riata® lead was used as a model to showcase the method's applicability.

    Conclusions:

    • High-frequency impedance measurement is a promising technique for early detection of insulation breaches in ICD leads.
    • This method offers improved sensitivity compared to low-frequency impedance monitoring.
    • Early detection of lead failures can enhance patient safety and device reliability.