Patent ID: 7947035
Filing Date: 2011-05-24
Classification: A61B

Abstract:
1. A medical instrument for an endoscope, wherein the instrument is configured to pass through an opening in a body wall of a living body, the medical instrument comprising: a first insertion portion having a base end portion to which an operation section is connected; a first offset portion extending outward from an axis of the first insertion portion; a second insertion portion having a base end portion joined to the first offset portion and an element extending parallel to the axis of the first insertion portion; a second offset portion which is joined to a head portion of the second insertion portion and reaches an extension of the axis of the first insertion portion; a third insertion portion which is joined to the second offset portion and has a portion arranged on an axis which is substantially the same as at least a part of the axis of the first insertion portion; an inner hole formed through the first insertion portion, the first offset portion, the second insertion portion, the second offset portion, and the third insertion portion; and a response mechanism configured to offset the third insertion portion from an axis of the second insertion portion, in response to an offset operation of the first insertion portion from the axis of the second insertion portion, in a manner that maintains a constant distance in an axial direction measured from the base end portion of the first insertion portion to a head portion of the third insertion portion.