Electrical membrane breakdown (EMB) is a novel form of non-thermal treatment that has not, to our knowledge, been previously evaluated for its potential utility as an ablation mechanism. The findings with EMB immediately after treatment were compared with other forms of ablation (cryoablation and IRE (irreversible electroporation)) in the porcine liver clinically, ultrasonographically, and by light microscopy and ultrastructural analysis. Clinically, EMB did not induce muscular contractions, in contrast with IRE. By ultrasound, all lesions were hypoechoic when compared to the untreated liver. EMB created a consistent pattern of immediate tissue destruction at the light microscopic and ultrastructural level, characterized by pulse-dose-related coagulative necrosis and nuclear pyknosis, preserved blood vessels and adjacent structures, and sharply demarcated margins. We conclude that the profile of EMB ablation is distinctive and unique, inducing necrosis by immediate electrical rupture of cell membranes non-thermally while preserving proteins and adjacent vessels with potentially superior stimulation of the immune system than other ablation modalities.
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