What question did this study set out to answer?

To evaluate how electrode geometry, tissue-electrode contact angle, and blood flow affect current density, thermal distribution, power requirements, and lesion dimensions during radio-frequency ablation.

January 1, 1995IEEE Transactions on Biomedical Engineering

Three-dimensional finite element analysis of current density and temperature distributions during radio-frequency ablation

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Population

Validated three-dimensional finite element models

Design

Preclinical

Authors

DPDorin PanescuOrange County Research Center JWJ.G. WhayneMyocardial Solutions (United States)SFS.D. FleischmanUniversity of California, San Francisco

Discussion

Member takes

Implication

Electrode angle and flow affect modeled lesion size; leaves open whether angle optimization improves clinical RF ablation outcomes.

Key Points

To evaluate how electrode geometry, tissue-electrode contact angle, and blood flow affect current density, thermal distribution, power requirements, and lesion dimensions during radio-frequency ablation.
Simulated radio-frequency ablation using validated three-dimensional finite element models.
Assessed the effects of electrode design modifications, blood flow rates, and tissue-electrode contact angles set at 0, 45, and 90 degrees.
A 45-degree electrode-tissue angle required greater power to reach a maximal tissue temperature of 95°C at 120 seconds, resulting in deeper and larger lesion volumes compared to 0- and 90-degree angles.
Increases in blood flow rate consistently elevated required generator power, lesion depth, and lesion volume regardless of catheter orientation.
Maximum tissue temperatures occurred subsurface, a fraction of a millimeter beneath the electrode, creating temperature discrepancies with tip sensors that fluctuated with flow rate and contact angle.

Structured PICO

Population

Validated three-dimensional finite element models

Intervention

Variations in electrode geometry, tissue-electrode angle (0, 45, and 90 degrees), and blood flow during radio-frequency ablation

Outcome

Current density, temperature distribution, lesion size, and power requirementssurrogate

Finite element analysis demonstrates that tissue-electrode angle and blood flow significantly affect RF ablation lesion size and power requirements, highlighting the safety and efficiency of temperature-controlled RF generators.

Cite This Study

Panescu et al. (1995) studied this question.

synapsesocial.com/papers/6a9035d8b9451609c833ca80 https://doi.org/10.1109/10.412649

Topics

AF ablation outcomes

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Three-dimensional finite element analysis of current density and temperature distributions during radio-frequency ablation

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Topics

Three-dimensional finite element analysis of current density and temperature distributions during radio-frequency ablation

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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Topics

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