OBJECTIVE: To minimize the effect of muscle contractions during irreversible electroporation (IRE), this paper attempts to research the ablation effect and muscle contractions by applying high-frequency IRE (H-FIRE) ablation to liver tissue in vivo. METHODS: An insulated needle electrode was produced by painting an insulating coating on the outer surface of the needle electrode tip. A series of experiments were conducted using insulated needle electrodes and traditional needle electrodes to apply H-FIRE pulses and traditional monopolar IRE pulses to rabbit liver tissues. The finite element model of the rabbit liver tissue was established to determine the lethal thresholds of H-FIRE in liver tissues. Muscle contractions were measured by an accelerometer. RESULTS: With increased constitutive pulse width and pulse voltage, the ablation area and muscle contraction strength are also increased, which can be used to optimize the ablation parameters of H-FIRE. Under the same pulse parameters, the ablation areas are similar for the two types of electrodes, and the ablation region has a clear boundary. H-FIRE and insulated needle electrodes can mitigate the extent of muscle contractions. The lethal thresholds of H-FIRE in rabbit liver tissues were determined. CONCLUSION: This paper describes the relationships between the ablation area, muscle contractions, and pulse parameters; the designed insulated needle electrodes can be used in IRE for reducing muscle contraction. SIGNIFICANCE: The study provides guidance for treatment planning and reducing muscle contractions in the clinical application of H-FIRE.
OBJECTIVE: To minimize the effect of muscle contractions during irreversible electroporation (IRE), this paper attempts to research the ablation effect and muscle contractions by applying high-frequency IRE (H-FIRE) ablation to liver tissue in vivo. METHODS: An insulated needle electrode was produced by painting an insulating coating on the outer surface of the needle electrode tip. A series of experiments were conducted using insulated needle electrodes and traditional needle electrodes to apply H-FIRE pulses and traditional monopolar IRE pulses to rabbit liver tissues. The finite element model of the rabbit liver tissue was established to determine the lethal thresholds of H-FIRE in liver tissues. Muscle contractions were measured by an accelerometer. RESULTS: With increased constitutive pulse width and pulse voltage, the ablation area and muscle contraction strength are also increased, which can be used to optimize the ablation parameters of H-FIRE. Under the same pulse parameters, the ablation areas are similar for the two types of electrodes, and the ablation region has a clear boundary. H-FIRE and insulated needle electrodes can mitigate the extent of muscle contractions. The lethal thresholds of H-FIRE in rabbit liver tissues were determined. CONCLUSION: This paper describes the relationships between the ablation area, muscle contractions, and pulse parameters; the designed insulated needle electrodes can be used in IRE for reducing muscle contraction. SIGNIFICANCE: The study provides guidance for treatment planning and reducing muscle contractions in the clinical application of H-FIRE.
Authors: Borja Mercadal; Natalie Beitel-White; Kenneth N Aycock; Quim Castellví; Rafael V Davalos; Antoni Ivorra Journal: Ann Biomed Eng Date: 2020-02-05 Impact factor: 3.934
Authors: Helena Cindric; Gorana Gasljevic; Ibrahim Edhemovic; Erik Brecelj; Jan Zmuc; Maja Cemazar; Alenka Seliskar; Damijan Miklavcic; Bor Kos Journal: Sci Rep Date: 2022-04-20 Impact factor: 4.996
Authors: Anna J Shangguan; Kang Zhou; Jia Yang; Aydin Eresen; Bin Wang; Chong Sun; Liang Pan; Su Hu; Ali T Khan; Samdeep K Mouli; Vahid Yaghmai; Zhuoli Zhang Journal: Clin Exp Gastroenterol Date: 2020-11-06