TRANSLATABLE OUTER TUBE FOR SEALING USING SHIELDED LAP CHOLE DISSECTOR

摘要

Aspects of the present disclosure are presented for a surgical instrument for cutting and sealing tissue. In some embodiments the surgical instrument includes a handle assembly a shaft and an end effector. The end effector may include: a blade that vibrates at an ultrasonic frequency a shielded portion enclosing a back edge of the blade a high friction surface coupled to the shielded portion and positioned between the shielded portion and the back edge of the blade. A space is defined between the high friction surface and the back edge of the blade when the end effector is in a cutting configuration. In a sealing configuration the high friction surface contacts the back edge of the blade which generates heat based on ultrasonic vibrations of the blade rubbing against the high friction surface. The shielded portion can coagulate bleeding tissue based on heat transfer from the high friction surface to the shielded portion.