Apparatus and method for percutaneaously securing a working space, e.g. in lumbar discectomy

摘要

A surgical operation apparatus of this invention includes an operation sheath (4) having a cavity securing portion (13) that is inserted into vital tissue through the skin to secure a working cavity for a surgical operation in the body, and a sheet member (12) that allows an operation tool to be inserted from outside the body into the cavity. The operation sheath is guided into the vital tissue by guide tools such as a dilator (2), a soft tube (3), and a mandrin (408).