Electrosurgical medical system and method
First Claim
1. A medical device comprising:
- an electrosurgical tissue cutting electrode;
a return electrode;
a patient box electrically connected to the electrosurgical tissue cutting electrode;
an RF transformer in the patient box, the RF transformer being configured to measure a first stream of RF telemetry signals;
an RF electrosurgical generator electrically coupled to the electrosurgical tissue cutting electrode and the return electrode, the RF electrosurgical generator being configured to provide an RF signal, wherein the RF electrosurgical generator being configured to measure a second stream of RF telemetry signals at an RF combiner housed within the RF electrosurgical generator, and wherein the RF electrosurgical generator being configured to provide a start mode with a first RF power output and a first RF duty cycle and a run mode with a second RF power output and a second RF duty cycle, wherein each of the first RF duty cycle and the second RF duty cycle is a ratio of a pulse duration to a pulse period;
a shielded transmission line electrically connecting the RF electrosurgical generator to the RF transformer in the patient box, whereby the patient box being configured to receive the RF signal from the RF electrosurgical generator and the patient box being configured to supply each of the first RF power output and the second RF power output to the electrosurgical tissue cutting electrode;
a determining device configured to determine when the electrosurgical tissue cutting electrode has started cutting a tissue; and
a control device configured to switch the RF electrosurgical generator from the start mode to the run mode in response to the determining device when the electrosurgical tissue cutting electrode has started to cut the tissue.
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Accused Products
Abstract
A medical device system and method provide an RF electrosurgical generator coupled to an electrosurgical electrode via a patient box disposed in close proximity to the patient. An RF signal is delivered from the generator to the patient box where signal power is increased and the RF signal delivered to the electrosurgical electrode. The patient box is coupled to the electrosurgical electrode by a short cable capable of carrying an HV, high frequency 5 MHz signal without leakage. An electrical characteristic associated with the electrosurgical electrode is monitored and a desired RF power output and duty cycle maintained by adjusting DC input voltage applied to an RF amplifier, responsive to the monitoring. The system determines when the electrosurgical cutting electrode has started cutting and switches from a start mode to a run mode having a different RF duty cycle and a reduced RF power output controlled by a servo system.
86 Citations
10 Claims
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1. A medical device comprising:
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an electrosurgical tissue cutting electrode; a return electrode; a patient box electrically connected to the electrosurgical tissue cutting electrode; an RF transformer in the patient box, the RF transformer being configured to measure a first stream of RF telemetry signals; an RF electrosurgical generator electrically coupled to the electrosurgical tissue cutting electrode and the return electrode, the RF electrosurgical generator being configured to provide an RF signal, wherein the RF electrosurgical generator being configured to measure a second stream of RF telemetry signals at an RF combiner housed within the RF electrosurgical generator, and wherein the RF electrosurgical generator being configured to provide a start mode with a first RF power output and a first RF duty cycle and a run mode with a second RF power output and a second RF duty cycle, wherein each of the first RF duty cycle and the second RF duty cycle is a ratio of a pulse duration to a pulse period; a shielded transmission line electrically connecting the RF electrosurgical generator to the RF transformer in the patient box, whereby the patient box being configured to receive the RF signal from the RF electrosurgical generator and the patient box being configured to supply each of the first RF power output and the second RF power output to the electrosurgical tissue cutting electrode; a determining device configured to determine when the electrosurgical tissue cutting electrode has started cutting a tissue; and a control device configured to switch the RF electrosurgical generator from the start mode to the run mode in response to the determining device when the electrosurgical tissue cutting electrode has started to cut the tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification