translatable outer tube for sealing using a protected laparoscopic cholecystectomy dissector

摘要

The present disclosure relates to a surgical instrument for cutting and sealing a tissue. In some embodiments, the surgical instrument includes a cable assembly, a stem, and an end actuator. The end actuator may include: a blade that vibrates at an ultrasonic frequency, a protected portion enclosing a rear edge of the blade, a high friction surface coupled to the protected portion and positioned between the protected portion and the rear edge of the blade. A gap is defined between the high friction surface and the rear edge of the blade when the end actuator is in a cutting configuration. In a sealing configuration, the high friction surface contacts the rear edge of the blade, which generates heat based on the ultrasonic vibrations of the blade rubbing against the high friction surface. The protected portion may coagulate bleeding from a tissue based on heat transfer from the high friction surface to the protected portion.