Electrosurgical cutting and coagulation apparatus
First Claim
1. Apparatus for electrosurgical use to cut and/or coagulate body tissue, said apparatus comprising an electrical generator and control means (6) connected to a tool (2), said tool (2) selectively operable to provide cutting and/or coagulation via a tip (4) formed at an end thereof, and including first and second electrodes in connection with said tip and characterized in that the control means (6) includes means for measuring the phase angle and the modulus of the impedance indicative of the body tissue and regulates the power supply to the tool dependent on said measurements to ensure that the optimum cutting power is supplied at each instant.
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Abstract
The apparatus and method of the current invention relate to electrosurgical work involving the forming of cuts in and coagulation of body tissue of a patient. The apparatus and method of the invention overcome disadvantages common with conventional dipolar and monopolar apparatus. In one aspect the invention provides a cutting tool or instrument with at least one cutting or coagulation tip and the tool is adapted to operate as both a power supply electrode to supply power to the tip and as a return electrode to allow impedance feedback signals to be received by a control means thereby eliminating the need for a separate second electrode and taking the patient out of the circuit received by a control means. According to a second aspect the feedback information is stored, processed and analysed in relation to pregrogrammed and previous actual feedback to allow alteration to the power supply to the tip to create optimum cutting and/or coagulating conditions.
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Citations
11 Claims
- 1. Apparatus for electrosurgical use to cut and/or coagulate body tissue, said apparatus comprising an electrical generator and control means (6) connected to a tool (2), said tool (2) selectively operable to provide cutting and/or coagulation via a tip (4) formed at an end thereof, and including first and second electrodes in connection with said tip and characterized in that the control means (6) includes means for measuring the phase angle and the modulus of the impedance indicative of the body tissue and regulates the power supply to the tool dependent on said measurements to ensure that the optimum cutting power is supplied at each instant.
Specification