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Hf-surgery device and method for an hf-surgery device

A surgical equipment, high-frequency technology, applied in the parts of surgical instruments, surgery, medical science, etc., can solve the problems of deterioration of neutral electrode detection ability, trouble, method and circuit structure skin contact monitoring quality fluctuation and other problems

Active Publication Date: 2011-10-12
OLYMPUS WINTER & IBE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Known methods and circuit structures suffer from the disadvantage of fluctuations in the quality of skin contact monitoring
In particular, it has been found that, starting from impedances greater than about 130 ohms (which can be caused, for example, by an increased proportion of fat in the tissue), the detection capability of an improperly placed neutral electrode deteriorates

Method used

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  • Hf-surgery device and method for an hf-surgery device
  • Hf-surgery device and method for an hf-surgery device
  • Hf-surgery device and method for an hf-surgery device

Examples

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Embodiment Construction

[0025] A high-frequency surgical device 1 for cutting and / or coagulating biological tissue has a power supply unit 2 , a frequency generator 3 and connection contacts 4 , 5 for an active electrode 6 and a neutral electrode 7 .

[0026] The power supply unit 2 is connected via power contacts 8 to a supply voltage source (not shown). The frequency generator 3 is connected on its input side to the power supply unit 2 . The frequency generator 3 is connected on the output side to the connection contact 4 for the active electrode 6 on the one hand and to the connection contact 5 for the neutral electrode 7 on the other hand. A corresponding anti-inductive capacitor 9 is arranged between the frequency generator 3 and the two connection contacts 5 for the separate neutral pole 7 .

[0027] Such as figure 1 As shown, an active electrode 6 , eg a cutting or coagulation electrode, is connected to the connection contact 4 . The neutral electrode 7 is applied to the skin of the patient...

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Abstract

The invention concerns an HF-surgery device for cutting and / or coagulating biological tissue and a method for same, which in operation monitors the patient skin contact of a connected neutral electrode having at least two separate contact surfaces. The HF-surgery device includes at least one parallel resonant circuit arranged in a patient circuit, at least one measurement energy source arranged in a measurement circuit galvanically separated from the patient circuit for producing a measurement voltage / current acting between the contact surfaces of the neutral electrode, and at least one measuring and computing unit which in operation determines by means of the measurement voltage / current a tissue impedance which is representative of the patient skin contact and which acts between the contact surfaces. An HF-current flows in the patient circuit which is closed in the cutting or coagulation operation and the measurement voltage which is independent of the HF-current can be produced in the measurement circuit. To provide an improved HF-surgery device it is provided according to the invention that the frequency of the measurement voltage source is substantially equal to a resonance frequency of the parallel resonant circuit.

Description

technical field [0001] The present invention relates to a high-frequency surgical device for cutting and / or coagulating biological tissue, which in operation monitors the contact of a connected neutral electrode having at least two separate contact surfaces with the patient's skin. The high-frequency surgical device comprises: at least one parallel resonant circuit arranged in the patient circuit; at least one measurement energy source arranged in a measurement circuit galvanically isolated from the patient circuit, the measurement energy source being used to generate an effect on the neutral a measured voltage / current between said contact surfaces of the electrodes; and at least one measuring and computing unit which, in operation, utilizes said measured voltage / current to determine an indication of contact with the patient's skin and to act on Tissue impedance between the contact surfaces. A high-frequency current flows in the patient circuit that is closed when a cutting o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B18/12
CPCA61B18/1233A61B18/1477A61B18/16A61B2018/00607A61B2018/00642A61B2018/00702A61B2018/00875
Inventor 蒂莫·斯特劳斯
Owner OLYMPUS WINTER & IBE GMBH
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