Patent ID: 7875025
Filing Date: 2011-01-25
Classification: A61B

Abstract:
1. Surgical apparatus for treating tumours in internal organs or bones of a human patient, the apparatus comprising a penetrative needle assembly for penetrating into an internal organ or bone of the human patient and ablating tumour tissue therein, said penetrative needle assembly comprising at least one cathode in an ablation zone of the needle assembly for hydrating, by electro-endosmosis, target tumour tissue in the ablation zone, an AC source coupled to the penetrative needle assembly for supplying ablating power of at least 5 W thereto, a DC source for biasing said cathode to a negative potential to induce said electro-endosmosis, wherein said AC source and said DC source are provided with switching means for inducing said electro-endosmosis prior to or simultaneously with ablating said tumour tissue in the ablation zone.