Patent ID: 8591500
Filing Date: 2013-11-26
Classification: A61B

Abstract:
1. A treatment apparatus comprising: a flexible tube section which has a longitudinal directions axis and extends in longitudinal directions; a distal treatment section which is provided to a distal direction side of the flexible tube section, and which is configured to rotate to directions about the longitudinal directions axis relative to the flexible tube section; a rotating operation section which is provided to a proximal direction side of the flexible tube section, and which is configured to perform rotating operation of the distal treatment section; a rotor which is fixed to the distal treatment section between the distal treatment section and the flexible tube section, and which is configured to rotate to the directions about the longitudinal directions axis relative to the flexible tube section, the rotor including a first outer surface spaced apart from the longitudinal directions axis of the flexible tube section by a first distance in radial directions, and a second outer surface spaced apart from the longitudinal directions axis of the flexible tube section by a second distance smaller than the first distance in the radial directions; a wire fixing portion which is provided to the rotor or a portion to the distal direction side of the rotor; a first rotating operation wire which has a distal end fixed to the wire fixing portion and extends from the wire fixing portion to the first outer surface of the rotor, the first rotating operation wire extending on the first outer surface in a state that the first rotating operation wire does not contact with the second outer surface, the first rotating operation wire being configured to be moved in an extending direction by the rotating operation in the rotating operation section so that a rotational force is applied from the first rotating operation wire to the first outer surface of the rotor toward a first rotation direction that is one of the directions about the longitudinal directions axis, and thereby the distal treatment section and the rotor being rotated in the first rotation direction by the rotational force applied from the first rotating operation wire; a second rotating operation wire which has a distal end fixed to the wire fixing portion and extends from the wire fixing portion to the second outer surface of the rotor, the second rotating operation wire extending on the second outer surface in a state that the second rotating operation wire does not contact with the first outer surface, the second rotating operation wire being configured to be moved in an extending direction by the rotating operation in the rotating operation section so that a rotational force is applied from the second rotating operation wire to the second outer surface of the rotor toward a second rotation direction opposite to the first rotation direction, and thereby the distal treatment section and the rotor being rotated in the second rotation direction; and a wire intersecting portion in which the first rotating operation wire and the second rotating operation wire intersect each other at positions apart from each other in a state that the second rotating operation wire is located on an inner direction side of the first rotating operation wire, wherein the first rotating operation wire and the second rotating operation wire are not in contact with each other.