Bipolar surgical shears
First Claim
Patent Images
1. Surgical shears including high frequency electrodes for selectively cauterizing areas being cut by the shears comprising:
- first and second electrically conductive shear members each having shearing surfaces and adjacent cutting edges and having an electrically insulating coating applied to surfaces other than the shearing surfaces;
mechanical fastening means for relatively rotatable connecting together and allowing relative scissor like motion between the first and second shear members so that in operative positions at least part of the shearing surfaces are opposed to one another and will be mechanically and electrically in contact with one another during use;
an electrode supported on each of the shear members in position to contact tissue when being cut by the shears, said electrode being insulated from the conductive portion of the respective first and second members by the electrically insulating coating;
a first electrical conductor supported on and insulated from the first shear member, connected to the electrode on the first shear member and providing terminal means for the connection to a power supply;
a third electrical conductor supported on and insulated from the second shear member and connected to the electrode on the second shear member and connected to electrical connection means passing through the mechanical fastening means, and;
a second electrical conductor mechanically supported on and electrically insulated from the first shear member and insulated from the first electrical conductor and the shearing surface by the insulating coating connected between a terminal means for connection to a power supply and the electrical connection means passing through the mechanical fastener means completing electrical connection to the electrode on the second shear means;
in which the mechanical fastening means for connecting together the shear members include a tubular molded resinous bushing about which the shear members rotate and through which passes a connecting conductor connecting together the third and second electrical conductors.
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Abstract
In a bipolar surgical shears, pivoted cutting members serve as a first electrode, and separate conductors, mounted on the cutting members and insulated therefrom, serve as second and third electrodes. One of the second and third electrodes is connected to a terminal on the opposite cutting member through a pivot pin comprising an insulating tube, so that all power supply connections are mounted on one of the pivoted cutting members. A power supply can be switched selectably to a selected one, or both, of the second and third electrodes.
342 Citations
10 Claims
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1. Surgical shears including high frequency electrodes for selectively cauterizing areas being cut by the shears comprising:
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first and second electrically conductive shear members each having shearing surfaces and adjacent cutting edges and having an electrically insulating coating applied to surfaces other than the shearing surfaces; mechanical fastening means for relatively rotatable connecting together and allowing relative scissor like motion between the first and second shear members so that in operative positions at least part of the shearing surfaces are opposed to one another and will be mechanically and electrically in contact with one another during use; an electrode supported on each of the shear members in position to contact tissue when being cut by the shears, said electrode being insulated from the conductive portion of the respective first and second members by the electrically insulating coating; a first electrical conductor supported on and insulated from the first shear member, connected to the electrode on the first shear member and providing terminal means for the connection to a power supply; a third electrical conductor supported on and insulated from the second shear member and connected to the electrode on the second shear member and connected to electrical connection means passing through the mechanical fastening means, and; a second electrical conductor mechanically supported on and electrically insulated from the first shear member and insulated from the first electrical conductor and the shearing surface by the insulating coating connected between a terminal means for connection to a power supply and the electrical connection means passing through the mechanical fastener means completing electrical connection to the electrode on the second shear means; in which the mechanical fastening means for connecting together the shear members include a tubular molded resinous bushing about which the shear members rotate and through which passes a connecting conductor connecting together the third and second electrical conductors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Surgical shears including high frequency electrodes for selectively cauterizing areas being cut by the shears comprising:
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first and second electrically conductive shear members each having shearing surfaces and adjacent cutting edges and having an electrically insulating coating applied to surfaces other than the shearing surfaces; mechanical fastening means for relatively rotatable connecting together and allowing relative scissor like motion between the first and second shear members so that in operative positions at least part of the shearing surfaces are opposed to one another and will be mechanically and electrically in contact with one another during use; an electrode supported on each of the shear members in position to contact tissue when being cut by the shears, said electrode being insulated from the conductive portion of the respective first and second members by the electrically insulating coating; a first electrical conductor supported on and insulated from the first shear member, connected to the electrode on the first shear member and providing terminal means for the connection to a power supply; a third electrical conductor supported on and insulated from the second shear member and connected to the electrode on the second shear member and connected to electrical connection means passing through the mechanical fastening means, and; a second electrical conductor mechanically supported on and electrically insulated from the first shear member and insulated from the first electrical conductor and the shearing surface by the insulating coating connected between a terminal means for connection to a power supply and the electrical connection means passing through the mechanical fastener means completing electrical connection to the electrode on the second shear means; in which the first and second conductors are connectible to one terminal of a power supply through switch means for selectably supplying high frequency power to a selected one, or both, or neither, of the electrodes on the shear members, and having a separate terminal connected to the base metal of the first shear member for connection to the other terminal of the power supply.
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Specification