Abstract:
An electrosurgical generator includes: a power supply configured to output a direct current; a current source coupled to the power supply and configured to output source current based on the direct current, and a power converter coupled to the current source, the power converter including at least one power switching element operated at a switching waveform. The power converter is configured to generate a converted waveform based on the source current. The electrosurgical generator also includes a controller coupled to the power converter and configured to modulate the switching waveform and a snubber circuit coupled to the current source and the power converter. The snubber circuit is configured to return the voltage at the at least one power switching element to zero after the power converter generates at least a portion of the converted waveform.
Abstract:
An electrosurgical generator includes a power supply configured to output a DC waveform, a current or voltage source coupled to the power supply and a power converter coupled to the current or voltage source, the power converter including at least one power switching element and a power inductor having an inductance value during switching of the at least one power switching element. The electrosurgical generator further includes a zero voltage switching (ZVS) inducing circuit coupled to the power converter at a switching node, the ZVS inducing circuit including an inductor having an inductance which is greater than the inductance value of the power inductor of the at least one power switching element.
Abstract:
A medical device for treating tissue includes a tissue-contacting surface and a solid state heating element that is thermally coupled to the tissue-contacting surface. The solid state heating element is configured to generate heat to thermally treat tissue.
Abstract:
An electrosurgical system for performing an electrosurgical procedure is provided and includes an electrosurgical generator and a calibration computer system. The electrosurgical generator includes one or more processors and a measurement module including one or more log amps that are in operative communication with the processor. The calibration computer system configured to couple to a measurement device and is configured to measure parameters of an output signal generated by the electrosurgical generator. The calibration computer system is configured to compile the measured parameters into one or more data look-up tables and couple to the electrosurgical generator for transferring the data look-up table(s) to memory of the electrosurgical generator. The microprocessor is configured to receive an output from the log amp(s) and access the data look-up table(s) from memory to execute one or more control algorithms for controlling an output of the electrosurgical generator.
Abstract:
A surgical instrument end effector assembly includes a first jaw member and a second jaw member. The second jaw member includes an ultrasonic blade body and first and second electrodes disposed on either side of the ultrasonic blade body and extending longitudinally along a majority of a length of the ultrasonic blade body. The ultrasonic blade body is adapted to receive ultrasonic energy from an ultrasonic waveguide. The first and second electrodes taper in width proximally to distally and are adapted to connect to a source of electrosurgical energy. The first jaw member is movable relative to the second jaw member between a spaced-apart position and an approximated position for grasping tissue therebetween.
Abstract:
A surgical system includes a power supply, a surgical instrument, and a power and data interface assembly. The power and data interface assembly includes a transformer having a primary winding, to which a first modulator and a second demodulator are coupled, and a secondary winding, to which a second modulator and a first demodulator are coupled. The power supply provides a power signal to the first modulator. The first modulator is configured to modulate, according to a first type of modulation, the power signal based on first data. The modulated power signal is communicated by the first modulator to the first demodulator by way of the transformer. The second modulator is configured to modulate, according to a second type of modulation, a second signal based on second data. The modulated second signal is communicated by the second modulator to the second demodulator by way of the transformer.
Abstract:
A system and method for return electrode monitoring are provided. The system includes an isolation circuit, a first controller, a second controller, and a detection circuit. The isolation circuit includes a transformer having a primary winding and a secondary winding. The first controller is coupled to the primary winding. The second controller and the detection circuit are coupled to the secondary winding. The detection circuit includes an interrogation signal circuit, a resonant tank filter, and a current-to-voltage converter. The interrogation signal circuit provides an interrogation signal to at least one electrode pad. The resonant tank filter filters a response signal received from the electrode pad. The current-to-voltage converter generates a voltage signal based on a current value of the response signal. The second controller generates a digital impedance value based on the voltage signal, and provides the digital impedance value to the first controller by way of the isolation circuit.
Abstract:
An electrical contact pin includes an outer shaft, an inner shaft at least partially received within the outer shaft and slidable relative to the outer shaft, and a rotatable member disposed at a free end of the inner shaft. The rotatable member is rotatable relative to the inner shaft in at least one direction.
Abstract:
A generator is configured to output two or more waveforms at different frequencies. In particular, the generator is configured to provide an ultrasonic waveform, which may be suitable for driving a transducer of an ultrasonic surgical instrument, and electrosurgical radiofrequency energy, which may be suitable for electrosurgical instruments.
Abstract:
An electronic device includes: a multilayered dielectric substrate including a plurality of dielectric layers; a planar magnetic device disposed on at least one internal dielectric layer of the plurality of dielectric layers; and an overlapping shield assembly including a first shield layer and a second shield layer separated by at least one of the plurality of dielectric layers.