Surgical instrument

Abstract

In a surgical instrument, a treatment portion continuously provided at a distal end of an insert section has a needle holding member made of an elastic body capable of holding a needle when the needle is pierced into the elastic body.

1 . A surgical instrument comprising: 
 a treatment portion continuously provided at a distal end of an insert section; and    the treatment portion having a needle holding member made of an elastic body capable of holding a needle when the needle is pierced into the elastic body.    
     
     
         2 . The surgical instrument according to  claim 1 , further comprising a needle holding-force adjusting mechanism for elastically deforming the elastic body, thereby variably adjusting a force of holding the needle pierced into the elastic body.  
     
     
         3 . The surgical instrument according to  claim 2 , wherein the needle holding-force adjusting mechanism elastically deforms the elastic body by compressing the elastic body.  
     
     
         4 . The surgical instrument according to  claim 2 , wherein the needle holding-force adjusting mechanism elastically deforms the elastic body by pulling the elastic body.  
     
     
         5 . The surgical instrument according to  claim 1 , wherein the elastic body has a plurality of holes into which the needle is pierceable, the holes being formed by arraying elastic members in a mesh-like pattern.  
     
     
         6 . The surgical instrument according to  claim 1 , wherein the elastic body includes cutouts capable pinching the needle.  
     
     
         7 . The surgical instrument according to  claim 1 , wherein the elastic body is of a two-layered structure comprising an outer layer and an inner layer, the inner layer being formed of a more flexible elastic member than an elastic member of the outer layer.  
     
     
         8 . The surgical instrument according to  claim 1 , wherein the needle holding member includes an adhesive layer covering a surface of the elastic body.  
     
     
         9 . The surgical instrument according to  claim 1 , wherein the needle holding member includes a magnet disposed inside the elastic body.  
     
     
         10 . The surgical instrument according to  claim 1 , wherein the treatment portion is a pinching portion capable of opening and closing in response to opening and closing operations.  
     
     
         11 . A surgical instrument comprising: 
 an operating section including an open/close operating member;    an insert section provided to extend from one end side of the operating section;    a clamping portion provided to extend from a distal end extension of the insert section while being inclined at a predetermined angle relative to a longitudinal central axis of the insert section, the clamping portion being able to passively rotate about an axis of the insert-section distal end extension in an extending direction and being able to open and close in response to an opening/closing operation of the open/close operating member; and    an open/close force transmitting member being advanced and retracted in interlock with the opening/closing operation of the open/close operating member disposed in the operating section, thereby transmitting an open/close force to the clamping portion.    
     
     
         12 . The surgical instrument according to  claim 11 , wherein the clamping portion includes two clamping members having flat surfaces arranged in opposed relation, 
 one of the two clamping members being moved by the open/close force transmitted through the open/close force transmitting member, which is advanced and retracted in interlock with the opening/closing operation of the open/close operating member, such that the one of the two clamping members is moved relative to the other.    
     
     
         13 . The surgical instrument according to  claim 12 , wherein the clamping portion further includes: 
 a biasing member for biasing the two clamping members such that the flat surfaces of the two clamping members come into close contact with each other,    one of the two clamping members being moved against a biasing force of the biasing member by the open/close force transmitted through the open/close force transmitting member, whereby the flat surfaces held in a close contact state by the biasing force of the biasing member are changed to a state apart from each other.    
     
     
         14 . A surgical instrument comprising: 
 an insert section including a distal end extension and a proximal end portion and having a first axis in a longitudinal direction;    an operating section provided at the proximal end side of the insert section;    a clamping portion extended from the distal end extension of the insert section in a direction of a second axis inclined at a predetermined angle relative to the first axis of the insert section;    a rotatable holder portion provided in the proximal end side of the clamping portion and held by the distal end extension of the insert section such that the clamping portion is rotatable about the second axis; and    at least one grasping portion provided at the distal end side of the clamping portion to be capable of advancing and retracting in a direction of the second axis.    
     
     
         15 . A surgical instrument comprising: 
 an insert section including a distal end extension and a proximal end portion and having a first axis in a longitudinal direction;    an operating section provided at the proximal end side of the insert section;    a transmitting member provided in the insert section to be capable of advancing and retracting therein;    a first grasping portion provided in the distal end extension of the insert section; and    a second grasping portion biased in a direction toward the first grasping portion and being movable in a direction away from the first grasping portion,    the second grasping portion having a first contact surface at the proximal end side thereof, the transmitting member having a second contact surface at the distal end side thereof, and the second contact surface being movable between a first portion apart from the first contact surface and a second position where the second contact surface presses the first contact surface.