JP2022068068A5

JP2022068068A5 -

Info

Publication number: JP2022068068A5
Application number: JP2020177016A
Authority: JP
Filing date: 2020-10-21
Publication date: 2023-09-28

Description

本発明の実施形態１を図７，８，９を用いて説明する．先端側に固定顎２１０と可動顎２２０があり，その先端部は曲線的である．固定顎２１０と可動顎２２０それぞれの顎口面２１１，２２１は陥凹して匙形状になっており，顎口面辺縁は先端以外では側方から見て直線や小鋸歯形状である．可動顎２２０の顎口面２２１辺縁が先端において，固定顎側に突出した突出歯２２３を一つのみ備えている．側面から見るとその突出歯２２３は曲線的に固定顎側に突出しており，突出歯の内壁２２２は可動顎２２０の長軸（図９の両矢印）に対して垂直の面と，さらに先端の方では直角以上の角度で返しとなっている部分がある．突出歯２２３の突出の長さが鉗子直径の１５％から４０％程度と外見上顕著である（図では約１７％）．図８のように，突出歯２２３は正面から見ると先端は丸みを帯びた曲線の山型となっている．突出歯には刃状でもなく鋭い部分はない．固定顎２１０の先端は前述突出歯２２３の分だけ欠削されて，先端の一部が開放部２１３となっている．その他は従来と同じで，図３のように外径3mmから4mmほどで長さ200mmから400mm程の細長いシャフト９３０があり手元側にハンドル９５０があり，シャフト９３０の内腔にロッド９４０が通っている．
Embodiment 1 of the present invention will be explained using FIGS. 7, 8, and 9. There is a fixed jaw 210 and a movable jaw 220 on the tip side, and the tip is curved. The gnathostome surfaces 211 and 221 of the fixed jaw 210 and the movable jaw 220 are concave and spoon-shaped, and the edges of the gnathostome surfaces other than the tips are straight or serrated when viewed from the side. The edge of the gnathostome surface 221 of the movable jaw 220 is provided with only one protruding tooth 223 at the tip thereof, which protrudes toward the fixed jaw side. When viewed from the side, the protruding tooth 223 protrudes in a curved manner toward the fixed jaw, and the inner wall 222 of the protruding tooth forms a surface perpendicular to the long axis of the movable jaw 220 (double-headed arrow in FIG. 9), and a surface at the tip thereof. On the other hand, there are parts where the angle is more than a right angle. The protruding length of the protruding teeth 223 is approximately 15% to 40% of the forceps diameter, which is visually remarkable (approximately 17% in the figure). As shown in Fig. 8, when viewed from the front, the protruding tooth 223 has a rounded, curved chevron-shaped tip. The protruding teeth are neither blade-like nor have any sharp parts. The tip of the fixed jaw 210 is cut away by the above-mentioned protruding tooth 223, and a part of the tip becomes an open part 213. The rest is the same as the conventional one, as shown in Figure 3, there is a long and thin shaft 930 with an outer diameter of about 3 mm to 4 mm and a length of about 200 mm to 400 mm, a handle 950 on the hand side, and a rod 940 passing through the inner cavity of the shaft 930. There is.

Claims

In grasping forceps for percutaneous total endoscopy, the distal end consists of a movable jaw and a fixed jaw , and the movable and fixed jaws have a concave shape on the gnathostome surface. The gnathostome margin is straight and/or serrated when viewed from the side except for the tip;
There is only one protruding tooth at the tip of the movable jaw, and the protruding tooth protrudes toward the fixed jaw side, and the inner wall of the protruding tooth has a part perpendicular to the long axis of the movable jaw and a bent part at an angle of at least a right angle. , the length of the protrusion is about 15% to 40% of the forceps diameter, and the tips of the protruding teeth are curved or obtuse when viewed from the front .
A gripping forceps characterized in that the tip of the fixed jaw is cut out by the amount of the protruding teeth when viewed from the front.