US Patent No. 10,987,157

COAGULATION AND DISSECTING INSTRUMENT WITH IMPROVED CONTROL


Patent No. 10,987,157
Issue Date April 27, 2021
Title Coagulation And Dissecting Instrument With Improved Control
Inventorship Rolf Weiler, Kusterdingen (DE)
Assignee

Claim of US Patent No. 10,987,157

1. An instrument for coagulating and, if needed, for dissecting biological tissue, with a tool comprising:at least one first and at least one second coagulating electrode which can be moved relative with respect to each other for grasping the biological tissue therebetween, and comprising at least one dissecting electrode for dissecting the biological tissue grasped between the at least one first and the at least one second coagulating electrode;
an electrical circuit that is connected to the at least one first and the at least one second coagulating electrode and to the at least one dissecting electrode and configured to be connected to a dissecting voltage source and a coagulating voltage source;
wherein the electrical circuit comprises
an input side including first and second input connections, wherein the first and second input connections are configured for connection with a high frequency (HF) output voltage source for providing electrical energy for operating the instrument;
a transformer electrically connected to the first and second input connections, the transformer configured to simultaneously provide the dissecting voltage source and the coagulating voltage source;
first, second, and third output connections, wherein the first output connection is connected to the at least one second coagulating electrode and to ground;
wherein the second output connection is a coagulating connection that is connected to the at least one first coagulating electrode; and
wherein the third output connection is a dissecting connection that is connected to the dissecting voltage source and to the at least one dissecting electrode;
a power switch disposed in a current path between the dissecting voltage source and the at least one dissecting electrode configured to selectively disconnect the at least one dissecting electrode from the dissecting voltage source or to selectively connect the at least one dissecting electrode to the dissecting voltage source; and
an actuating switch for selectively actuating the high frequency (HF) output voltage source;
wherein the actuating switch and the power switch are controlled in series by a shared actuating element wherein actuation of the shared actuating element initiates one of a dissecting mode, wherein the power switch is closed to connect the at least one dissecting electrode to the dissecting voltage source and the actuating switch is subsequently closed to actuate the high frequency output voltage source, and a coagulation mode, wherein the power switch is opened to disconnect the at least one dissecting electrode from the dissecting voltage source and the actuating switch is subsequently closed to actuate the high frequency output voltage source;
wherein in the dissecting mode, the at least one dissecting electrode is energized by the dissecting voltage source and the at least one first coagulating electrode is energized by the coagulating voltage source simultaneously.