Electrosurgical instrument with a knife blade lockout mechanism

摘要

An electrosurgical forceps is provided with a shaft that extends from a housing of the electrosurgical forceps. An end effector assembly operably coupled to the shaft includes a pair of first and second jaw members. One or both of the first and second jaw members is movable from an open configuration, to a clamping configuration. A knife blade assembly includes a knife blade translatable within the first and second jaw members. A knife blade lockout mechanism is in operative communication with the knife blade assembly and includes an elongated cam slot with a cam pin translatable therein from a distal end of the elongated cam slot corresponding to the knife blade lockout mechanism engaged with the knife blade assembly, to a proximal position corresponding to the knife blade lockout mechanism disengaged from the knife blade assembly.

主权项

1. An electrosurgical forceps, comprising:
a housing; a shaft extending distally from the housing and including a distal portion; a drive member; first and second jaw members operably coupled to the distal portion of the shaft and configured to move between open and clamping configurations; a knife blade assembly including a knife blade configured to translate relative to the first and second jaw members; and a knife blade lockout mechanism supported within the shaft distal to the housing, the knife blade lockout mechanism defining an elongated cam slot and including a cam pin coupled to the drive member and supported within the elongated cam slot, the cam pin configured to translate through the elongated cam slot between a first position and a second position, the knife blade lockout mechanism configured to prevent movement of the knife blade when the cam pin is disposed in the first position and configured to enable movement of the knife blade when the cam pin is disposed in the second position.