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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0437962 (1995-05-10) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 892 인용 특허 : 0 |
An impedance feedback electrosurgical system is useful with electrosurgical tools to maintain a substantially constant level of current within the tissue in contact with the tool. The system comprises active and return electrodes associated with an electrosurgical tool, an impedance monitoring devic
An impedance feedback electrosurgical system is useful with electrosurgical tools to maintain a substantially constant level of current within the tissue in contact with the tool. The system comprises active and return electrodes associated with an electrosurgical tool, an impedance monitoring device and a power control unit. Energy sufficient to affect tissue is delivered through the active electrode to tissue and to the return electrode. The impedance measuring device is in circuit with the return electrodes and measures the impedance of tissue. A signal representative of tissue impedance is communicated from the impedance measuring device to the power control unit. The power control unit adjusts the energy applied to tissue to maintain tissue impedance within a preselected and desired range.
[ What is claimed is:] [1.] An impedance feedback electrosurgical system for cutting and/or cauterizing living tissue comprising a bipolar electrosurgical device having a cutting portion including opposed, first and second tissue engaging surfaces defining a tissue engaging space therebetween, where
[ What is claimed is:] [1.] An impedance feedback electrosurgical system for cutting and/or cauterizing living tissue comprising a bipolar electrosurgical device having a cutting portion including opposed, first and second tissue engaging surfaces defining a tissue engaging space therebetween, wherein one of the first or second surfaces includes an active, energy delivering electrode, and the other of the first or second surfaces includes a return electrode electrically insulated from the active, energy delivering electrode and being adapted to receive electrosurgical energy delivered by the active electrode through living tissue disposed within the tissue engaging space;power means, in electrical communication with the active and return electrodes, for supplying radio frequency energy to the electrosurgical device;impedance measurement means in electrical communication with the electrosurgical device and the power means, the impedance measuring means having a first electrical connection that is coupled to the return electrode for measuring the electrical impedance of the living tissue disposed within the tissue engaging space based on current and voltage applied to the tissue, the impedance measurement means generating a tissue impedance signal representative of tissue impedance; andpower control means, in circuit with the electrosurgical device, the impedance measurement means and the power means, for regulating the electrosurgical energy delivered to the living tissue disposed within the tissue-engaging space by the active, energy delivering electrode in response to the impedance signal to maintain the tissue impedance within a preselected range.
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