发明名称 |
Impedance feedback monitor for electrosurgical instrument |
摘要 |
An impedance monitoring device is provided for monitoring the electrical impedance of tissue as it is treated with electrosurgical energy. Based on a predicted model of tissue impedance and a number of initial impedance readings, the impedance at which tissue treatment is completed is predicted. More particularly, a minimum impedance level is measured and a function of the minimum impedance is used to determine impedance at which coagulation is completed. A control device is provided for bringing the output of the generator within an optimum range based on a system load curve. In one embodiment the impedance monitoring device is used in conjunction with a bipolar electrosurgical instrument. Preferably, the instrument comprises electrically opposite electrodes located on one or more tissue engaging surfaces for engaging tissue to be treated. <IMAGE> |
申请公布号 |
EP0703461(A3) |
申请公布日期 |
1997.11.12 |
申请号 |
EP19950306723 |
申请日期 |
1995.09.22 |
申请人 |
ETHICON ENDO-SURGERY, INC. |
发明人 |
YATES, DAVID C. |
分类号 |
A61B5/05;A61B1/00;A61B17/072;A61B17/115;A61B17/125;A61B17/32;A61B18/12;A61B18/14;A61B19/00 |
主分类号 |
A61B5/05 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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