Laparoscopic scissors

摘要

A laparoscopic scissor instrument can include a scissor assembly pivotally coupled to an elongate shaft. The scissor assembly can be formed of scissor blades having pivot posts thereon. The pivot posts can engage apertures on the elongate shaft, thus eliminating the need for a through-pinned pivot connection of the scissor blades. The scissor blades can also include actuation posts thereon. An actuation mechanism can include a slot to engage the actuation posts and open or close the blades of the scissor assembly. The scissor assemblies described herein can have a relatively low operational height such that they do not extend beyond a diameter of the elongate shaft during opening and closing of the scissor assembly.

主权项

1. A laparoscopic scissor instrument comprising:
a handle assembly; an elongate tube having a proximal end coupled to the handle assembly and a distal end opposite the proximal end; a scissor assembly positioned at the distal end of the elongate tube, the scissor assembly comprising:
a first scissor blade having a cutting portion and an actuation portion, and the first scissor blade comprising:
a pivot aperture formed through the first scissor blade, anda first actuation protrusion extending from a surface of the actuation portion of the first scissor blade;a second scissor blade having a cutting portion and an actuation portion, and the second scissor blade comprising:
a second pivot aperture formed through the second scissor blade, anda second actuation protrusion extending from a surface of the actuation portion of the second scissor blade;a pivot pin pivotably coupling the first scissor blade and the second scissor blade to the distal end of the elongate tube through the pivot aperture of the first scissor blade and the second pivot aperture of the second scissor blade; and an actuator axially slidable within the elongate tube, the actuator comprising a pivot slot receiving the pivot pin, the pivot slot having a length to provide for a full stroke length of the scissor assembly and an actuation slot receiving one of the first actuation protrusion and the second actuation protrusion.