Patent ID: 9173550
Filing Date: 2015-11-03
Classification: A61B

Abstract:
1. A medical apparatus comprising: a flexible sheath; a procedure instrument having a treatment section provided at a distal end of the procedure instrument; an arm section having a first bending part capable of a bending operation and a first channel capable of inserting the treatment section therethrough and capable of protruding therefrom, the arm section being disposed to protrude from a tip of the sheath; an operation stick having a second channel connected to the first channel and inserting the procedure instrument therethrough, and a bending operating part connected to the arm section by an operation-transmission member; and an operation part provided in a proximal end side of the procedure instrument for operating the treatment section, wherein the procedure instrument is configured to be capable of moving between a place in which the treatment section is protruded from the arm section and a predetermined place in the arm section where a whole length of the treatment section is housed inside the arm section when the procedure instrument is inserted into the operation stick, wherein the operation stick further comprises: a falloff-preventive section for preventing the operation part of the procedure instrument from falling off the operation stick, the falloff-preventive section is arranged at a proximal end side of the operation stick and is configured to lock and stop movement of the operation part of the procedure instrument within the operation stick when the treatment section is disposed at the predetermined place in the arm section, the first bending part of the arm section is bent by tilting the operation stick in at least one of vertical and horizontal directions, wherein the falloff-preventive section comprises a piston enclosed within the operation stick.