Patent application number | Description | Published |
20080249523 | Controller for flexible tissue ablation procedures - An electrosurgical system including a generator configured to supply radiofrequency (RF) energy is disclosed. The system includes at least two electrodes configured to apply RF energy to tissue and at least one return electrode for returning the RF energy to the generator. The generator may operate in a first operational mode and at least one other operational mode. The system includes a controller configured to control the application of RF energy to each of the two or more electrodes and the return of RF energy to the generator. The controller includes a plurality of switching components configured to selectively switch the flow of the RF energy between the two or more electrodes and between the return electrode and at least one of the two or more electrodes based on the operational mode of the generator. | 10-09-2008 |
20080287791 | Switched Resonant Ultrasonic Power Amplifier System - A switched resonant power amplifier system for ultrasonic transducers is disclosed. The system includes an amplifier that receives and processes a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device. An output control circuit receives and processes a signal related to a feedback signal generated by the ultrasonic device and a divider reference signal, and generates a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received feedback signal and the divider reference signal. A compensated drive circuit receives and processes the compensated clock signal for generating the divider reference signal, and for generating the driver output signal. | 11-20-2008 |
20080287838 | Switched Resonant Ultrasonic Power Amplifier System - A switched resonant power amplifier system for ultrasonic transducers is disclosed. The system includes an amplifier that receives and processes a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device. An output control circuit receives and processes a signal related to a feedback signal generated by the ultrasonic device and a divider reference signal, and generates a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received feedback signal and the divider reference signal. A compensated drive circuit receives and processes the compensated clock signal for generating the divider reference signal, and for generating the driver output signal. | 11-20-2008 |
20090054891 | ELECTROSURGICAL SYSTEM EMPLOYING MULTIPLE ELECTRODES AND METHOD THEREOF - A system and method for heat ablation of tissue in which energy is sequentially applied to at least two electrodes inserted into tissue. The system is comprised of a radiofrequency (RF) source for supplying RF energy, at least two electrodes configured to apply RF energy to tissue, at least one return electrode for returning the RF energy to the RF source, and a controller configured to sequentially apply the RF energy to each of the at least two electrodes. The sequential delivery of energy is determined by the measured current and voltage, the calculated impedance at each of the electrodes and the timing for each electrode. An internal load may be activated with the previously activated channel and remain on until the next channel is activated to avoid the generator from having an open circuit. | 02-26-2009 |
20100179532 | Electrosurgical System Employing Multiple Electrodes - A system for heat ablation of tissue in which energy is sequentially applied to at least two electrodes inserted into tissue, the system comprising a radiofrequency source configured to supply radiofrequency energy to two or more electrodes, at least one return electrode for returning the RF energy to the RF source, and a controller configured to sequentially apply the RF energy to each of the two or more electrodes for a predetermined period of time. The controller includes a determiner configured to determine an off time for a next electrode in a sequence and a comparator configured to compare the off time for the next electrode in the sequence to a predetermined minimum off time. The controller applies the radiofrequency energy to the next electrode in the sequence when the off time is greater than the predetermined minimum off time. | 07-15-2010 |
20100185195 | Smart Return Electrode Pad - An electrosurgical return electrode is disclosed. The return electrode includes a return electrode pad having a patient-contacting surface configured to conduct electrosurgical energy and a sensor circuit coupled to the return electrode pad. The sensor circuit is configured to monitor at least one of a return electrode pad property and a tissue property to generate sensor data. The return electrode also includes a control circuit coupled to the return electrode pad and to the sensor circuit. The control circuits configured to receive and process sensor data from the sensor circuit and relay the processed sensor data to an electrosurgical energy source. | 07-22-2010 |
20100318079 | Transformer for RF Voltage Sensing - An electrosurgical system is disclosed. The electrosurgical system includes a multiple-secondary transformer configured for sensing voltage. The multiple-secondary transformer includes a primary winding coupled to an active terminal and a return terminal of the electrosurgical system and a plurality of secondary windings. Each of the secondary windings is configured to transform the radio frequency voltage into a sensed voltage. Each of the secondary windings includes an output coupled to a sensor circuit and configured to transmit the sensed voltage to the sensor circuit. | 12-16-2010 |
20110190761 | Temperature Sensing Return Electrode Pad - An electrosurgical return electrode is disclosed. The return electrode includes a conductive pad having one or more temperature monitoring zones and a patient-contacting surface configured to conduct electrosurgical energy and a temperature sensing circuit coupled to the conductive pad. The temperature sensing circuit includes at least one diode disposed within the at least one temperature monitoring zone, the at least one diode having a predetermined forward voltage drop that is indicative of temperature of at least one temperature monitoring zone. | 08-04-2011 |
20120059367 | Electrosurgical System Employing Multiple Electrodes - A system for heat ablation of tissue, the system comprising a radiofrequency source configured to supply RF energy to at least two electrodes for treating tissue, at least one return electrode configured to return the RF energy to the radiofrequency source, a controller configured to sequentially apply the RF energy to each of the at least two electrodes for a pre-determinable period of time and circuitry configured to switch the RF energy to an internal load. The RF energy is applied simultaneously to the internal load and at least one of the at least two electrodes. The controller is configured to apply the RF energy to the next electrode in the sequence when the amount of time the applied RF energy is off is greater than a predetermined minimum off time. | 03-08-2012 |
20120116268 | Switched Resonant Ultrasonic Power Amplifier System - A switched resonant power amplifier system for ultrasonic transducers is disclosed. The system includes an amplifier that receives and processes a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device. An output control circuit receives and processes a signal related to a feedback signal generated by the ultrasonic device and a divider reference signal, and generates a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received feedback signal and the divider reference signal. A compensated drive circuit receives and processes the compensated clock signal for generating the divider reference signal, and for generating the driver output signal. | 05-10-2012 |
20120226274 | Electrosurgical System Employing Multiple Electrodes and Method Thereof - A method for performing an electrosurgical procedure at a surgical site on a patient, the method including the steps of providing a current restricting circuit operatively coupled between a source of electro surgical energy and an electrode, the current restricting circuit including: a switch configured to direct the flow of electrosurgical energy; and a plurality of current restrictive devices arranged in an H-Bridge arrangement, wherein the switch is disposed between adjacent current restrictive devices of the plurality of current restrictive devices; restricting the flow of electrosurgical energy wherein the current restricting circuit is configured to restrict a flow of electrosurgical energy when the switch is in a first position; enabling the flow of electrosurgical energy when the switch is in a second position; and dynamically controlling the electrosurgical energy delivered to the electrode with the current restricting circuit. | 09-06-2012 |
20130293353 | External Reader for Device Management - A system for tracking use of a medical device including an electrosurgical generator, a readable module and a read module. The electrosurgical generator is configured to selectively deliver an electrosurgical energy signal to an electrosurgical delivery device connected to the electrosurgical generator. The readable module is connected to the electrosurgical delivery device and configured to uniquely identify the electrosurgical delivery device. The read module is in communication with the electrosurgical generator that identifies the read module, the read module configured to identify the readable module and further configured to determine the viability of the electrosurgical delivery device. Delivery of electrosurgical energy to the electrosurgical delivery device is enabled by the read module if the electrosurgical delivery device is a viable device. | 11-07-2013 |
20130345695 | ENERGY-HARVESTING SYSTEM, APPARATUS AND METHODS - An electrosurgical energy delivery apparatus includes an energy delivery circuit, a control circuit and an energy-harvesting system with a plurality of energy-harvesting circuits and a voltage regulator that provides a regulated DC voltage to the energy delivery circuit and/or the control circuit. The energy delivery circuit receives an electrosurgical energy signal having a primary frequency and selectively provides the electrosurgical energy signal to an energy delivery element. The control circuit connects to the energy delivery circuit and selectively enables the flow of electrosurgical energy to the energy delivery element. The plurality of energy-harvesting circuits each include an energy-harvesting antenna tuned to a particular frequency, a matched circuit configured to receive an RF signal from the energy-harvesting antenna, rectify the RF signal and generate a DC signal, and an energy storage device that connects to the voltage regulator to receive and store the DC signal. | 12-26-2013 |
20140163431 | Switched Resonant Ultrasonic Power Amplifier System - A switched resonant power amplifier system for ultrasonic transducers is disclosed. The system includes an amplifier that receives and processes a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device. An output control circuit receives and processes a signal related to a feedback signal generated by the ultrasonic device and a divider reference signal, and generates a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received feedback signal and the divider reference signal. A compensated drive circuit receives and processes the compensated clock signal for generating the divider reference signal, and for generating the driver output signal. | 06-12-2014 |
20140243938 | SYSTEMS AND DEVICES FOR TREATMENT OF HYPOTHERMIA AND SYSTEMS INCLUDING GARMENTS ADAPTED TO CONTROLLABLY EMIT ENERGY FOR WARMING WEARER - A system for the treatment of hypothermia includes an energy source controllably operable to output energy, a controller operably associated with the energy source, an encasing-structure being conformable over a treatment region, and one or more vital sign detectors adapted to generate an electrical signal indicative of a measurement of a vital sign of a patient. The encasing-structure includes an energy-applicator device including a configuration of energy-delivery elements disposed in association with the encasing-structure. The controller is adapted to receive the electrical signal from the one or more vital sign detectors. The controller is configured to adjust one or more treatment parameters based at least in part on the electrical signal. | 08-28-2014 |