KERRISON PUNCH

PROBLEM TO BE SOLVED: To provide the Kerrison punch that is improved in operability.SOLUTION: A tip part of an insertion part 2 to a cannula in a Kerrison punch 1 is curved upward by a predetermined angle set in a range of 20° to 30° to a front-rear axis 14 of the insertion part 2. Also, the tip part is formed in a structure twisted in a predetermined angle set in a range of 30° to 90° around the axis in a base part of the insertion part 2. When the insertion part is rotated around the axis, a cutting part of the tip moves in a range wider than before, and an adjacent next part can be cut even if the longitudinal axis direction of the insertion part is not changed. Also, as being twisted, it facilitates operation in a sense of viewing a cutting portion from the direction deviated from the axis of the insertion part 2. 【課題】ケリソンパンチの操作性を向上させる。【解決手段】ケリソンパンチ１におけるカニューレへの挿入部分２の先端部を、挿入部分２の前後軸線１４に対して２０?〜３０?の範囲で設定した所定の角度だけ上方へ湾曲させる。また、同先端部を挿入部分２の基部において前記軸線の周りに３０?〜９０?の範囲で設定した所定の角度に捩った構造とする。挿入部分を軸周りに回転させると先端の切截部が従来よりも広い範囲を移動し、挿入部の前後軸線方向を変えなくても近接した次の箇所を切截できる。また、捩ってあることにより、切截箇所を挿入部分２の軸線を外れた方向から見る感覚で施術しやすい。【選択図】図１