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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0771129 (2010-04-30) |
등록번호 | US-8696659 (2014-04-15) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 9 인용 특허 : 490 |
Electrosurgical systems and methods are described herein in which the temperature of a fluid within a body or joint space is determined and/or monitored despite the energy generated during treatment by an ablation probe. One or more temperature sensors are positioned along the probe proximally of th
Electrosurgical systems and methods are described herein in which the temperature of a fluid within a body or joint space is determined and/or monitored despite the energy generated during treatment by an ablation probe. One or more temperature sensors are positioned along the probe proximally of the electrode assembly and measure the temperature of an electrically conductive fluid without being overly influenced by the surgical effect occurring proximate the electrode assembly. A controller automatically suspends energy delivery for one or more periods of time while the temperature is monitored.
1. An electrosurgical method for monitoring temperature during an electrosurgical procedure to ablate soft tissue comprising: delivering high frequency energy to an active electrode terminal located at a distal end of an electrosurgical probe, said active electrode terminal being positioned in elect
1. An electrosurgical method for monitoring temperature during an electrosurgical procedure to ablate soft tissue comprising: delivering high frequency energy to an active electrode terminal located at a distal end of an electrosurgical probe, said active electrode terminal being positioned in electrically conductive fluid during the electrosurgical procedure and wherein a current flow path from the active electrode terminal, through the electrically conductive fluid, to a return electrode is created when the high frequency energy is delivered;monitoring a temperature signal indicative of a temperature of the electrically conductive fluid;automatically suspending the delivering step for at least one suspension period;during the at least one suspension period, measuring or calculating the temperature of the electrically conductive fluid from the temperature signal; andrepeating the step of delivering upon completion of the at least one suspension period, wherein the at least one suspension period has a duration sufficient for an electrical noise associated with the step of delivering the high frequency energy to diminish and to allow the temperature signal to stabilize. 2. The method of claim 1 wherein said at least one suspension period is at least 250 ms. 3. The method of claim 1 further comprising: circulating the electrically conductive fluid to a target site at a flowrate;comparing the temperature signal indicative of the temperature of the electrically conductive fluid to a desired temperature range; andadjusting the flowrate based on the measured or calculated temperature of the electrically conductive fluid. 4. The method of claim 1 wherein said delivering step forms a plasma in the vicinity of the active electrode terminal. 5. The method of claim 1 wherein said soft tissue is within a joint. 6. The method of claim 1 wherein said automatically suspending step is performed by reducing the high frequency energy so as to reduce an applied voltage difference between the active electrode terminal and the return electrode to less than 100 volts. 7. An electrosurgical method for monitoring temperature during an electrosurgical procedure to ablate soft tissue comprising: delivering high frequency energy to an active electrode terminal located at a distal end of an electrosurgical probe, said active electrode terminal being positioned in electrically conductive fluid during the electrosurgical procedure and wherein a current flow path from the active electrode terminal, through the electrically conductive fluid, to a return electrode is created when the high frequency energy is delivered;adjusting the high frequency energy for at least one suspension period;during the at least one suspension period, monitoring a temperature signal indicative of the temperature of the electrically conductive fluid; andrepeating the step of delivering upon completion of the at least one suspension period, wherein the at least one suspension period has a duration sufficient for an electrical noise associated with the step of delivering the high frequency energy to diminish and to allow the temperature signal to stabilize. 8. The method of claim 7 wherein the step of adjusting is done automatically by a controller in electrical communication with the electrosurgical probe. 9. The method of claim 7 wherein adjusting the high frequency energy comprises suspending the high frequency energy delivery for the at least one suspension period. 10. The method of claim 7 wherein adjusting the high frequency energy comprises reducing the high frequency energy delivery for the at least one suspension period. 11. The method of claim 7 wherein monitoring the temperature signal indicative of the temperature of the electrically conductive fluid further comprises measuring or calculating a sensed temperature of the electrically conductive fluid.
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