| 摘要 |
Hook scissors end effectors are provided for a laparoscopic instrument. The hook scissors end effectors generally comprise first and second blades (90,92), with at least one of the blades pivotally engaging the laparoscopic instrument. Each blade comprises an elongate straight blade member with an integral transverse hook element (209,211) at the distal end of the blade member. The hook elements each extend towards the other blade member and each hook element is offset from its blade member so that a narrow recess is provided between opposing first and second hook members upon closing of the first and second blade members. The elongate straight blade members provide a straight scissors cutting action therebetween so that the contiguously adjacent portions of the blade members gradually come together in a continuous bearing contact to effect a cutting action. While the hook elements at the distal ends of the blades effectively provide a hook which contains the object to be severed, the distal portions of the blade members do not establish contact with each other until the cutting action reaches the distal portion of the scissors. |
