Translatable outer tube for sealing using shielded lap chole dissector
First Claim
1. An end effector, comprising:
- a blade comprising a cutting edge, wherein the cutting edge comprises a straight edge configured to dissect and coagulate tissue, wherein the blade further comprises a back edge, wherein the back edge comprises a flat side, wherein the back edge of the blade is positioned opposite to the cutting edge of the blade, and wherein the blade is configured to couple to an ultrasonic waveguide and configured to vibrate at an ultrasonic frequency to produce ultrasonic vibrations that dissect and coagulate the tissue;
a shielded portion enclosing the back edge of the blade, wherein the shielded portion is configured to partially surround at least one lateral edge of the blade; and
a high-friction surface coupled to the shielded portion and positioned between the shielded portion and the back edge of the blade, wherein a space is defined between the high-friction surface and the back edge of the blade when the end effector is configured into a dissecting configuration;
wherein, when the end effector is configured into a sealing configuration, the high-friction surface contacts the back edge of the blade and is configured to generate heat by frictionally coupling the ultrasonic vibrations of the blade to the high-friction surface, and wherein the shielded portion is configured to directly contact the tissue to coagulate the tissue by coupling heat from the high-friction surface to the tissue.
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Accused Products
Abstract
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.
2193 Citations
8 Claims
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1. An end effector, comprising:
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a blade comprising a cutting edge, wherein the cutting edge comprises a straight edge configured to dissect and coagulate tissue, wherein the blade further comprises a back edge, wherein the back edge comprises a flat side, wherein the back edge of the blade is positioned opposite to the cutting edge of the blade, and wherein the blade is configured to couple to an ultrasonic waveguide and configured to vibrate at an ultrasonic frequency to produce ultrasonic vibrations that dissect and coagulate the tissue; a shielded portion enclosing the back edge of the blade, wherein the shielded portion is configured to partially surround at least one lateral edge of the blade; and a high-friction surface coupled to the shielded portion and positioned between the shielded portion and the back edge of the blade, wherein a space is defined between the high-friction surface and the back edge of the blade when the end effector is configured into a dissecting configuration; wherein, when the end effector is configured into a sealing configuration, the high-friction surface contacts the back edge of the blade and is configured to generate heat by frictionally coupling the ultrasonic vibrations of the blade to the high-friction surface, and wherein the shielded portion is configured to directly contact the tissue to coagulate the tissue by coupling heat from the high-friction surface to the tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification