Endoscope therapeutic device

Abstract

In an endoscope therapeutic device having a plurality of introduction guide tubes for introducing a treatment tool into a body cavity, the introduction guide tubes are mutually joined at a position more proximal than bending portions thereof. Accordingly, the effects caused by the movement of the plurality of the introduction guide tubes are mutually invalidated at a joint portion as a fulcrum, so that the position of the introduction guide tube is relatively stabilized in the body cavity. As joining methods, there are integration, usage of a joint tool, and usage of an over tube. The operability is improved when the introduction guide tube is provided at the distal end thereof with a mechanism for retaining and/or rotating a distal end of a treatment tool inserted therethrough.

1 . An endoscope therapeutic device for introducing a treatment tool into a body cavity and performing treatment by the treatment tool under observation by an endoscope, the endoscope therapeutic device comprising: 
 a plurality of introduction guide tubes for introducing the treatment tool into a body cavity, each of the plurality of introduction guide tubes comprise an insertion portion, one or more bending portions provided at a distal side of the insertion portion and being bendable by a bending operation; and    a mutual joint for joining at least two of the plurality of introduction guide tubes disposed at a position proximal to the distal-most bending portions of each of the at least two introducing guide tubes.    
     
     
         2 . An endoscope therapeutic device according to  claim 1 , wherein all of the plurality of the introduction guide tubes are joined at the position proximal to the distal-most bending portion of each of the introduction guide tubes.  
     
     
         3 . An endoscope therapeutic device according to  claim 1 , wherein the mutual joint of the at least two introduction guide tubes is achieved by a configuration in which at least part of the respective insertion portions of the at least two introduction guide tubes are integrally joined.  
     
     
         4 . An endoscope therapeutic device according to  claim 1 , wherein the mutual joint of the at least two introduction guide tubes comprises a joint tool.  
     
     
         5 . An endoscope therapeutic device according to  claim 4 , wherein the joint tool comprises a mechanism for resiliently deforming at least part of the joint tool for joining the at least two introduction guide tubes.  
     
     
         6 . An endoscope therapeutic device according to  claim 1 , wherein the mutual joint comprises an over tube for receiving introduction guide tubes to be joined inserted therethrough and tightening a member inserted through the distal part.  
     
     
         7 . An endoscope therapeutic device according to  claim 1 , wherein at least one of the plurality of introduction guide tubes is provided at the distal portion thereof with an operating mechanism for retaining a distal portion of a treatment tool inserted through the introduction guide tube and for moving the treatment tool.  
     
     
         8 . An endoscope therapeutic device for introducing a treatment tool into a body cavity and performing treatment by the treatment tool under observation by an endoscope, the endoscope therapeutic device comprising: 
 the endoscope comprising an insertion portion and a bending portion;    at least one introduction guide tube for introducing the treatment tool into a body cavity, the introduction guide tube comprising an insertion portion and at least one bending portion provided at a distal side of the insertion portion of the at least one introduction guide tube, the bending portion of the introduction guide tube being bendable by a bending operation; and    a joint tool for detachably joining the insertion portion of the endoscope and a portion of the at least one introduction guide tube at a position proximal to the distal-most bending portion of the at least one introduction guide tube.    
     
     
         9 . An endoscope therapeutic device according to  claim 8 , wherein the at least one introduction guide tube comprises a plurality of introduction guide tubes, wherein the plurality of the introduction guide tubes are mutually joined at the position proximal to the distal most bending portion of each of the introduction guide tubes.  
     
     
         10 . An endoscope therapeutic device according to  claim 9 , wherein the joint tool also achieves a mutual joint between the plurality of introduction guide tubes.  
     
     
         11 . An endoscope therapeutic device according to  claim 8 , wherein the joint tool comprises an over tube for receiving the endoscope and the at least one introduction guide tube inserted therethrough, and the over tube is mounted so that a relative position of the introduction guide tube in a radial direction does not change at a fixed portion in the vicinity of a distal portion of the over tube.  
     
     
         12 . An endoscope therapeutic device according to  claim 11 , further comprising at least one suction tube inserted through the over tube, wherein the over tube is further mounted so that the relative position of the at least one suction tube in the radial direction does not change at the fixed portion.  
     
     
         13 . A therapeutic instrument joint tool for mutually joining therapeutic instruments each having at least one bending portion and being configured for introduction into a body cavity, the therapeutic instrument joint tool being configured to mutually join the therapeutic instruments at a position proximal to the distal-most bending portions of each of the therapeutic instruments to be joined.  
     
     
         14 . An over tube comprising: 
 a bending portion being bendable by a bending operation;    an insertion portion for inserting a plurality of introduction guide tubes therein; and,    a fixed portion for mutually fixing the plurality of introduction guide tubes at a position in the vicinity of and proximal to the bending portions of each of the plurality of introduction guide tubes.    
     
     
         15 . An over tube according to  claim 14 , wherein the insertion portion has a plurality of insertion guide openings, corresponding to the plurality of introduction guide tubes so that the plurality of the introduction guide tubes can be respectively inserted therein.  
     
     
         16 . An introduction guide tube for receiving a treatment tool used for treatment in a body cavity inserted therethrough, the introduction guide tube comprising: 
 an operating mechanism provided at a distal portion of the introduction guide tube for retaining a distal end of the treatment tool inserted through the introduction guide tube and for moving the distal end of the treatment tool.    
     
     
         17 . An introduction guide tube according to  claim 16 , wherein the operating mechanism comprises an engaging member that engages part of an insertion portion of the treatment tool.  
     
     
         18 . An introduction guide tube according to  claim 17 , further comprising a mechanism for selectively engaging and disengaging the engaging member, the mechanism being actuated from a proximal side of the introduction guide tool.  
     
     
         19 . An introduction guide tube according to  claim 16 , wherein the operating mechanism is a moving mechanism for moving the distal end of the treatment tool in a fore-and-aft direction.  
     
     
         20 . An introduction guide tube according to  claim 16 , wherein the operating mechanism is a rotating mechanism for rotating the distal end of the treatment tool.  
     
     
         21 . An introduction guide tube according to  claim 20 , wherein the rotating mechanism rotates in a direction about an axis of rotation corresponding to a longitudinal axis of a treatment tool insertion channel of the introduction guide tube or an axis extending in parallel with the longitudinal axis.  
     
     
         22 . An introduction guide tube according to  claim 20 , wherein the rotating mechanism rotates in a same direction as an operating direction of the operating mechanism on the proximal side of the introduction guide tube.  
     
     
         23 . An introduction guide tube according to  claim 20 , wherein the rotating mechanism is operated such that an operating direction of the operating mechanism on a proximal side of the introduction guide tube is substantially parallel with an axis of rotation of the rotating mechanism.