abstract |
Provided is a forceps-type electric treatment instrument capable of preventing a short circuit between electrodes and reliably cutting off a tissue piece. A forceps-type electric treatment instrument (2) includes a catheter tube (4) that can be inserted into a body, and a cup-shaped first forceps piece having a first electrode (30) formed on a distal end side edge of a first recess (24). 12a, a cup-shaped second forceps piece 14a in which a second electrode 32 is formed on a distal end side edge of the second recess 26, and a support 6 for holding the forceps pieces 12a, 14a in an openable and closable manner. And a voltage supply means 40 for supplying a high-frequency voltage between the electrodes 30 and 32. In a state where the forceps pieces 12a and 14a are maximally closed, the electrodes 30 and 32 do not contact each other, The opening of the first recess 24 of the first forceps piece 12a facing the second forceps piece 14a is formed such that the second electrode 32 of the second forceps piece 14a enters the first recess 24 of the first forceps piece 12a. It is formed larger than the outer circumference of the second forceps piece 14a facing the first forceps piece 12a. There. [Selection diagram] Fig. 1 |