Multi-Tissue Analysis on the Impact of Electroporation on Electrical and Thermal Properties
被引:23
作者:
Beitel-White, Natalie
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机构:
Virginia Polytech & State Univ, Dept Biomed Engn & Mech, Blacksburg, VA 24061 USA
Virginia Polytech & State Univ, Bradley Dept Elect & Comp Engn, Blacksburg, VA 24061 USAVirginia Polytech & State Univ, Dept Biomed Engn & Mech, Blacksburg, VA 24061 USA
Beitel-White, Natalie
[1
,2
]
Lorenzo, Melvin F.
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机构:
Virginia Polytech & State Univ, Dept Biomed Engn & Mech, Blacksburg, VA 24061 USAVirginia Polytech & State Univ, Dept Biomed Engn & Mech, Blacksburg, VA 24061 USA
Lorenzo, Melvin F.
[1
]
Zhao, Yajun
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机构:
Virginia Polytech & State Univ, Dept Biomed Engn & Mech, Blacksburg, VA 24061 USAVirginia Polytech & State Univ, Dept Biomed Engn & Mech, Blacksburg, VA 24061 USA
Zhao, Yajun
[1
]
Brock, Rebecca M.
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机构:
Virginia Maryland Reg Coll Vet Med, Dept Biomed Sci & Pathol, Blacksburg, VA USAVirginia Polytech & State Univ, Dept Biomed Engn & Mech, Blacksburg, VA 24061 USA
Brock, Rebecca M.
[3
]
Coutermarsh-Ott, Sheryl
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Virginia Maryland Reg Coll Vet Med, Dept Biomed Sci & Pathol, Blacksburg, VA USAVirginia Polytech & State Univ, Dept Biomed Engn & Mech, Blacksburg, VA 24061 USA
Coutermarsh-Ott, Sheryl
[3
]
Allen, Irving C.
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Virginia Maryland Reg Coll Vet Med, Dept Biomed Sci & Pathol, Blacksburg, VA USAVirginia Polytech & State Univ, Dept Biomed Engn & Mech, Blacksburg, VA 24061 USA
Allen, Irving C.
[3
]
Manuchehrabadi, Navid
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AngioDynamics Inc, Latham, NY USAVirginia Polytech & State Univ, Dept Biomed Engn & Mech, Blacksburg, VA 24061 USA
Manuchehrabadi, Navid
[4
]
Davalos, Rafael, V
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机构:
Virginia Polytech & State Univ, Dept Biomed Engn & Mech, Blacksburg, VA 24061 USAVirginia Polytech & State Univ, Dept Biomed Engn & Mech, Blacksburg, VA 24061 USA
Davalos, Rafael, V
[1
]
机构:
[1] Virginia Polytech & State Univ, Dept Biomed Engn & Mech, Blacksburg, VA 24061 USA
[2] Virginia Polytech & State Univ, Bradley Dept Elect & Comp Engn, Blacksburg, VA 24061 USA
[3] Virginia Maryland Reg Coll Vet Med, Dept Biomed Sci & Pathol, Blacksburg, VA USA
Conductivity;
Electrodes;
Probes;
Temperature measurement;
Liver;
Temperature distribution;
Numerical models;
Conductivity measurement;
cells (biology);
bioimpedance;
biological materials;
D O I:
10.1109/TBME.2020.3013572
中图分类号:
R318 [生物医学工程];
学科分类号:
0831 ;
摘要:
Objective: Tissue electroporation is achieved by applying a series of electric pulses to destabilize cell membranes within the target tissue. The treatment volume is dictated by the electric field distribution, which depends on the pulse parameters and tissue type and can be readily predicted using numerical methods. These models require the relevant tissue properties to be known beforehand. This study aims to quantify electrical and thermal properties for three different tissue types relevant to current clinical electroporation. Methods: Pancreatic, brain, and liver tissue were harvested from pigs, then treated with IRE pulses in a parallel-plate configuration. Resulting current and temperature readings were used to calculate the conductivity and its temperature dependence for each tissue type. Finally, a computational model was constructed to examine the impact of differences between tissue types. Results: Baseline conductivity values (mean 0.11, 0.14, and 0.12 S/m) and temperature coefficients of conductivity (mean 2.0, 2.3, and 1.2 % per degree Celsius) were calculated for pancreas, brain, and liver, respectively. The accompanying computational models suggest field distribution and thermal damage volumes are dependent on tissue type. Conclusion: The three tissue types show similar electrical and thermal responses to IRE, though brain tissue exhibits the greatest differences. The results also show that tissue type plays a role in the expected ablation and thermal damage volumes. Significance: The conductivity and its changes due to heating are expected to have a marked impact on the ablation volume. Incorporating these tissue properties aids in the prediction and optimization of electroporation-based therapies.