An electrosurgical instrument includes first and second jaw members each including an outer jaw housing, a tissue-treating plate, and a longitudinally-extending knife channel defined therethrough. The electrosurgical instrument also includes a knife actuator and a knife assembly operably coupled to the knife actuator. The knife actuator is configured to advance at least a portion of the knife assembly through the knife channel to cut tissue disposed between the jaw members. The knife assembly includes an elongated shaft having a proximal portion coupled to the knife actuator and a distal portion defining at least one aperture therethrough. The knife assembly also includes a knife blade having a sharpened distal end configured to cut tissue and at least one raised portion extending through the aperture defined by the elongated shaft.
