Patent ID: 9668769
Date: 2017-06-06
CPC Classifications: A61B,A61F

Claim:
1. A tissue separation device comprising: an inner structure including an expansion part which is expandable from a contracted state to an expanded state, and an operation unit which is disposed proximal to the expansion part and which is operable to expand the expansion part from the contracted state to the expanded state; a restriction member comprising a tubular body with a lumen, the expansion part of the inner structure being positioned within the lumen of the tubular body when the expansion part is in the contracted state; the tubular body of the restriction member comprising a slit which restricts an expansion direction of the expansion part when the expansion part expands so that the expansion part in the expanded state protrudes out through the slit in the tubular body of the restriction member; an outer structure disposed outside of the restriction member, the outer structure including a deformation part covering the slit in the tubular body of the restriction member, the deformation part being deformed outwardly during expansion of the expansion part to the expanded state by virtue of the expansion part in the expanded state protruding out through the slit and outwardly deforming the deformation part, the deformation part being insertable into a living body; and wherein the expansion part in the expanded state in the deformation part is moved relative to the deformation part without moving the deformation part relative to the living body.