| 摘要 |
The surgical instrument of the present invention is constructed from a treatment part opening-and-closing operating part comprising a fixed handle and a pivoting handle, which also serves as a gripping part, an elongated treatment part operating rod having rigidity, which is connected to the pivoting handle of this treatment part opening-and-closing operating part, and which advances and retracts in accordance with the operation of the pivoting handle, an insertion part through which this treatment part operating rod is inserted, a pivoting base which is shaft-supported on the distal end portion of this insertion part via a pivoting shaft disposed in a direction perpendicular to the longitudinal axis of the insertion part so that this pivoting base is free to pivot, an elongated pivoting base operating rod having rigidity whose distal end portion is connected to this pivoting base, and which causes the pivoting base to pivot about the pivoting shaft by performing an advancing and retracting motion, a treatment part base which is connected to the pivoting base, and on which a surgical treatment part which performs an opening-and-closing action in accordance with the advancing and retracting operation of the treatment part operating rod is disposed, and a joint member having a plurality of universal joints and constituting a connecting part having rigidity that connects the treatment part operating rod and the surgical treatment part disposed on the treatment part base.
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