Patent ID: 8986197
Filing Date: 2015-03-24
Classification: A61B

Abstract:
1. A medical system comprising: a treatment instrument comprising: an insertion portion inserting/pulling-out device comprising a pair of rollers adapted to press and nip at least one of the exterior member and the insertion member, and to transmit a driving force to the exterior member or the insertion member to advance or retreat at least one of the exterior member and the insertion member in the axial direction; a driving force non-transmitting portion fixed to an outer surface of a half-way portion of the insertion member extending from a proximal end surface of the exterior member, the driving force non-transmitting portion being adapted to move from a position proximal of the pair of rollers to a position distal of the pair of rollers and in contact with the proximal end surface of the exterior member to transmit a driving force from the pair of rollers to the exterior member; and an advancing/retreating movement switching mechanism portion adapted to advance the insertion member along with a movement of the exterior member when the exterior member is in an advancing state, and to retreat the exterior member along with a movement of the insertion member when the insertion member is in a retreating state.