Abstract: An interrogation and detection system for detection of surgical implements within a patient's body is presented. The system includes an RFID tag configured to transmit a return signal when energized, a signal generator configured to generate an energizing signal for the RFID tag, and a coil antenna operably coupled to the signal generator, the antenna configured to receive a return signal transmitted by the RFID tag. The coil antenna includes a primary coil, a secondary coil, and a core configured to couple electromagnetic energy from the secondary coil to the primary coil. The core includes a non-magnetic insulating material. The secondary coil is configured to receive the return signal. The primary coil is configured to couple electromagnetic energy from the secondary coil. The RFID tag affixed to a surgical implement.

Abstract: A controller for an electrosurgical generator includes an RF inverter, a signal processor, a software compensator, a hardware compensator, and an RF inverter controller. The RF inverter generates an electrosurgical waveform and the signal processor outputs a measured value of at least one of a voltage, a current, or power of the electrosurgical waveform. The software compensator generates a desired value for at least one of the voltage, the current, or the power of the electrosurgical waveform, and the hardware compensator generates a phase shift based on the measured value and the desired value. The RF inverter controller generates a pulse-width modulation (PWM) signal based on the phase shift to control the RF inverter.

Abstract: An inventory system configured for detecting and counting potentially retained surgical items within a body of a patient includes a dual detection tag, a signal generator, and an antenna operably coupled to the signal generator. The dual detection tag includes a beacon tag configured to transmit a first return signal at a first frequency when energized and a RFID tag affixed configured to transmit a second return signal at a second frequency when energized. The signal generator is configured to generate an energizing signal for the beacon tag and/or the RFID tag. The antenna configured to receive the first return signal transmitted by at least one of the beacon tag or the second return signal transmitted by the RFID tag.

Abstract: An ultrasonic surgical system includes an ultrasonic generator configured to provide an electrical drive signal, an ultrasonic transducer configured to receive the electrical drive signal and to produce ultrasonic mechanical motion in response thereto, and a blade coupled to the ultrasonic transducer and configured to receive the ultrasonic mechanical motion from the ultrasonic transducer for treating tissue in contact therewith. The ultrasonic transducer defines a saturation point and the ultrasonic generator is configured to drive the ultrasonic transducer substantially at the saturation point such that the ultrasonic mechanical motion produced by the ultrasonic transducer is substantially equal to a maximum ultrasonic mechanical motion of the ultrasonic transducer.

Abstract: A controller for an electrosurgical generator includes an RF inverter, a signal processor, a software compensator, a hardware compensator, and an RF inverter controller. The RF inverter generates an electrosurgical waveform and the signal processor outputs a measured value of at least one of a voltage, a current, or power of the electrosurgical waveform. The software compensator generates a desired value for at least one of the voltage, the current, or the power of the electrosurgical waveform, and the hardware compensator generates a phase shift based on the measured value and the desired value. The RF inverter controller generates a pulse-width modulation (PWM) signal based on the phase shift to control the RF inverter.

Abstract: The disclosed apparatus relates to an apparatus for sensing current that includes a Rogowski coil assembly and a circuit board. The Rogowski coil assembly has a housing, a slot in the housing configured to receive a conductor through the slot, a Rogowski coil formed within the housing, and a connector. The circuit board has a substantially planar substrate, which has a slot through the substrate configured to receive the Rogowski coil assembly. A complementary connector of the circuit board is configured to receive the connector of the Rogowski coil assembly. The Rogowski coil assembly is positioned through the slot of the substrate, and the complementary connector of the circuit board couples with the connector of the Rogowski coil assembly. In various embodiments, the conductor can be a conductive trace on the substrate of the circuit board, and the Rogowski coil is configured to detect a current through the conductive trace.

Abstract: The disclosed apparatus relates to an apparatus for sensing current that includes a Rogowski coil assembly and a circuit board. The Rogowski coil assembly has a housing, a slot in the housing configured to receive a conductor through the slot, a Rogowski coil formed within the housing, and a connector. The circuit board has a substantially planar substrate, which has a slot through the substrate configured to receive the Rogowski coil assembly. A complementary connector of the circuit board is configured to receive the connector of the Rogowski coil assembly. The Rogowski coil assembly is positioned through the slot of the substrate, and the complementary connector of the circuit board couples with the connector of the Rogowski coil assembly. In various embodiments, the conductor can be a conductive trace on the substrate of the circuit board, and the Rogowski coil is configured to detect a current through the conductive trace.