ELECTROSURGICAL DEVICE HAVING A TEMPERATURE MEASUREMENT DEVICE, METHOD FOR DETERMINING A TEMPERATURE AND/OR A TEMPERATURE CHANGE AT A NEUTRAL ELECTRODE
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Abstract
A method for determining a temperature and/or a temperature change at a neutral electrode having a contacting agent layer. The method comprises determining at least one impedance value of the contacting agent layer and calculating a temperature change and/or a temperature at the neutral electrode, at least on the basis of the impedance value. The contacting agent lavers may be made from hydrogel and the method uses a correlation that exists between the temperature change and the impedance change.
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Citations
53 Claims
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1-24. -24. (canceled)
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25. An electrosurgical device, comprising:
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a high frequency (HF) generator for generating an HF current, which can be conducted into a biological tissue via an instrument; and a neutral electrode having a contacting agent layer, the HF generator comprising a temperature measurement device for determining a temperature and/or a temperature change at the neutral electrode, the temperature measurement device comprising; an impedance measurement device, for determining the temperature and/or the temperature change, configured to detect an impedance of the contacting agent layer, the impedance measurement device comprises a measurement current generator, configured to provide a measurement current to a first electrode section and a second electrode section, and a current integration device, configured to total up a value relating to the HF current over time, and to put said value in relation to an impedance change to determine the temperature and/or the temperature change. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A method of determining a temperature and/or a temperature change at a neutral electrode having a contacting agent layer, said method comprising the steps of:
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determining at least one impedance value of the contacting agent layer; and calculating a temperature change and/or a temperature at the neutral electrode at least on the basis of the impedance value, a duration of an activation phase of an applied HF current and an effective value of the HF current. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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Specification