Electric knife device
First Claim
1. An electric knife device comprising a high frequency current source having first and second output terminals, a knife electrode connected to the first output terminal, a patient electrode connected to the second output terminal and to be electrically contacted with the patient, first current detector means for detecting the current flowing between the first output terminal and said knife electrode, second current detector means for detecting the current flowing between the second output terminal and said patient electrode, division circuit means for calculating the ratio between the outputs of said first and second current detector means and means fed by the output of said division circuit means for controlling the high frequency current flowing through said knife electrode in accordance with the ratio calculated by said division circuit means.
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Abstract
An electric knife device comprises a high frequency current source, a knife electrode, a patient electrode opposed to the knife electrode, a first wire coupling one output of the high frequency source and the knife electrode, a second wire coupling the other output of the high frequency source and the patient electrode, first and second current detectors for detecting the currents flowing through the first and second wires, respectively, a division circuit for calculating the ratio between the outputs of the first and second current detectors, the current flowing through the first wire being controlled when the ratio calculated by the division circuit becomes lower than a predetermined value.
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Citations
8 Claims
- 1. An electric knife device comprising a high frequency current source having first and second output terminals, a knife electrode connected to the first output terminal, a patient electrode connected to the second output terminal and to be electrically contacted with the patient, first current detector means for detecting the current flowing between the first output terminal and said knife electrode, second current detector means for detecting the current flowing between the second output terminal and said patient electrode, division circuit means for calculating the ratio between the outputs of said first and second current detector means and means fed by the output of said division circuit means for controlling the high frequency current flowing through said knife electrode in accordance with the ratio calculated by said division circuit means.
Specification