Electrocautery surgical scissors
First Claim
Patent Images
1. Tissue-cutting apparatus comprising:
- first and second electrically conductive tissue-cutting blades coupled together about a common pivot for relative movement thereabout between open and closed positions, the first and second tissue-cutting blades, each having an elongated cutting edge with the cutting edges disposed to pass each other in contiguous relationship along the elongated cutting edges as the first and second relatively move from open toward closed positions;
an electrode disposed on and insulated from each of the first and second blades on a side thereof remote from the contiguous cutting edges;
an electrical connection between only one of the first and second blades and the associated electrode disposed thereon for establishing common electrical signal potential thereon, the electrode on at least one of the first and second tissue-cutting blades being extended with respect to the cutting edge of the associated blade in a direction toward the cutting edge of the other of the first and second tissue-cutting blades; and
conductors connected to the electrodes for supplying electrical signals thereto.
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Accused Products
Abstract
Surgical apparatus includes bipolar electrodes and tissue-shearing blades configured to electrically contact tissue for electrocauterization thereof prior to shearing contact of the cutting blades with the tissue over wide angles of presentation of the tissue to the electrodes and blades. Extensions or protrusions disposed along facing edges of the electrodes separate the level at which tissue is electrically contacted by the electrodes from the level at which tissue is sheared by the cutting blades.
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Citations
11 Claims
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1. Tissue-cutting apparatus comprising:
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first and second electrically conductive tissue-cutting blades coupled together about a common pivot for relative movement thereabout between open and closed positions, the first and second tissue-cutting blades, each having an elongated cutting edge with the cutting edges disposed to pass each other in contiguous relationship along the elongated cutting edges as the first and second relatively move from open toward closed positions; an electrode disposed on and insulated from each of the first and second blades on a side thereof remote from the contiguous cutting edges; an electrical connection between only one of the first and second blades and the associated electrode disposed thereon for establishing common electrical signal potential thereon, the electrode on at least one of the first and second tissue-cutting blades being extended with respect to the cutting edge of the associated blade in a direction toward the cutting edge of the other of the first and second tissue-cutting blades; and conductors connected to the electrodes for supplying electrical signals thereto. - View Dependent Claims (2)
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3. Tissue-cutting apparatus comprising:
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a pair of conductive cutting blades mounted for rotation about a common pivot between open and closed configurations with cutting edges of the cutting blades disposed to pass each other in contiguous relationship along elongated portions of the cutting edges in response to movement of the pair of cutting blades about the common pivot; and an electrode attached to and insulated from each of the cutting blades with only one of the electrodes connected to the associated cutting blade, the electrode on at least one of the cutting blades being extended with respect to the cutting edge of the associated blade in a direction toward the cutting edge of the other cutting blade. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. Tissue-cutting apparatus comprising:
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first and second electrically conductive cutting blades coupled together about a pivot for relative movement thereabout between open and closed positions, each of the first and second conductive cutting blades having an elongated cutting edge disposed to pass each other in contiguous and conductive relationship along the elongated cutting edges as the first and second cutting blades relatively move from open toward closed positions; electrodes attached to and insulated from the cutting blades and disposed to receive opposite-potential electrical signals supplied thereto, the electrode on each of the first and second tissue-cutting blades being extended with respect to the cutting edge of the associated blade in a direction toward the cutting edge of the other of the first and second tissue-cutting blades; and a conductor electrically connecting only one of the cutting blades to the attached electrode for energizing both tissue-cutting blades and the one electrode with an opposite potential than the other electrode. - View Dependent Claims (11)
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Specification