Experimental and Numerical Investigation of Parameters Affecting High-Frequency Irreversible Electroporation for Prostate Cancer Ablation. Aycock, K. N., Vadlamani, R. A., Jacobs, E. J., Imran, K. M., Verbridge, S. S., Allen, I. C., Manuchehrabadi, N., & Davalos, R. V. J Biomech Eng, 2022. 1528-8951 Aycock, Kenneth N Vadlamani, Ram Anand Jacobs, Edward J Imran, Khan Mohammad Verbridge, Scott S Allen, Irving C Manuchehrabadi, Navid Davalos, Rafael V Journal Article Research Support, Non-U.S. Gov't United States 2022/01/20 J Biomech Eng. 2022 Jun 1;144(6):061003. doi: 10.1115/1.4053595.
doi  abstract   bibtex   
While the primary goal of focal therapy for prostate cancer (PCa) is conserving patient quality of life by reducing oncological burden, available modalities use thermal energy or whole-gland radiation which can damage critical neurovascular structures within the prostate and increase risk of genitourinary dysfunction. High-frequency irreversible electroporation (H-FIRE) is a promising alternative ablation modality that utilizes bursts of pulsed electric fields (PEFs) to destroy aberrant cells via targeted membrane damage. Due to its nonthermal mechanism, H-FIRE offers several advantages over state-of-the-art treatments, but waveforms have not been optimized for treatment of PCa. In this study, we characterize lethal electric field thresholds (EFTs) for H-FIRE waveforms with three different pulse widths as well as three interpulse delays in vitro and compare them to conventional irreversible electroporation (IRE). Experiments were performed in non-neoplastic and malignant prostate cells to determine the effect of waveforms on both targeted (malignant) and adjacent (non-neoplastic) tissue. A numerical modeling approach was developed to estimate the clinical effects of each waveform including extent of nonthermal ablation, undesired thermal damage, and nerve excitation. Our findings indicate that H-FIRE waveforms with pulse durations of 5 and 10 μs provide large ablations comparable to IRE with tolerable levels of thermal damage and minimized muscle contractions. Lower duration (2 μs) H-FIRE waveforms exhibit the least amount of muscle contractions but require increased voltages which may be accompanied by unwanted thermal damage.
@article{RN109,
   author = {Aycock, K. N. and Vadlamani, R. A. and Jacobs, E. J. and Imran, K. M. and Verbridge, S. S. and Allen, I. C. and Manuchehrabadi, N. and Davalos, R. V.},
   title = {Experimental and Numerical Investigation of Parameters Affecting High-Frequency Irreversible Electroporation for Prostate Cancer Ablation},
   journal = {J Biomech Eng},
   volume = {144},
   number = {6},
   note = {1528-8951
Aycock, Kenneth N
Vadlamani, Ram Anand
Jacobs, Edward J
Imran, Khan Mohammad
Verbridge, Scott S
Allen, Irving C
Manuchehrabadi, Navid
Davalos, Rafael V
Journal Article
Research Support, Non-U.S. Gov't
United States
2022/01/20
J Biomech Eng. 2022 Jun 1;144(6):061003. doi: 10.1115/1.4053595.},
   abstract = {While the primary goal of focal therapy for prostate cancer (PCa) is conserving patient quality of life by reducing oncological burden, available modalities use thermal energy or whole-gland radiation which can damage critical neurovascular structures within the prostate and increase risk of genitourinary dysfunction. High-frequency irreversible electroporation (H-FIRE) is a promising alternative ablation modality that utilizes bursts of pulsed electric fields (PEFs) to destroy aberrant cells via targeted membrane damage. Due to its nonthermal mechanism, H-FIRE offers several advantages over state-of-the-art treatments, but waveforms have not been optimized for treatment of PCa. In this study, we characterize lethal electric field thresholds (EFTs) for H-FIRE waveforms with three different pulse widths as well as three interpulse delays in vitro and compare them to conventional irreversible electroporation (IRE). Experiments were performed in non-neoplastic and malignant prostate cells to determine the effect of waveforms on both targeted (malignant) and adjacent (non-neoplastic) tissue. A numerical modeling approach was developed to estimate the clinical effects of each waveform including extent of nonthermal ablation, undesired thermal damage, and nerve excitation. Our findings indicate that H-FIRE waveforms with pulse durations of 5 and 10 μs provide large ablations comparable to IRE with tolerable levels of thermal damage and minimized muscle contractions. Lower duration (2 μs) H-FIRE waveforms exhibit the least amount of muscle contractions but require increased voltages which may be accompanied by unwanted thermal damage.},
   keywords = {*Electroporation
Heart Rate
Humans
Male
Muscle Contraction
*Prostatic Neoplasms/surgery
Quality of Life},
   ISSN = {0148-0731},
   DOI = {10.1115/1.4053595},
   year = {2022},
   type = {Journal Article}
}

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