Provided is a head photic stimulation device including: a brain wave amplifier which subjects the subject brain waves acquired using a brain wave sensor to A/D conversion and amplification; a control signal generation circuit which, based on an output signal from the brain wave amplifier, generates a control signal for controlling LED driving; and a light irradiation unit which is driven based on an output from the control signal generation circuit, and which includes an LED for irradiating a head. The control signal generation circuit includes a band-pass filter for filtering an input signal, a DSP (signal processing) unit for controlling a signal that has passed through the band-pass filter, and a light irradiation output unit using a near-infrared LED for irradiating the head. The DSP unit has a feedback function for matching a phase of a PWM output for controlling the light irradiation output unit, in synchronism with the subject brain waves.

A system is provided to detect a breach of an insulative sheath in a bipolar electrosurgical instrument the system including: a first pulse detection circuit to detect a first high frequency (HF) signal component of a HF signal conducted on a lead of the bipolar instrument; a second pulse detection circuit to detect a second HF signal component of the HF signal conducted on a conductive shield surrounding the lead; magnitude difference sampling logic to produce sample values indicative of magnitude difference between the first HF signal component and the second HF signal component; and current detection logic to detect current flow between the shield and anatomical tissue based upon the sample values.

Apparatus and associated methods relate to controlling electrical power of an electrotherapeutic signal that is provided to a biological tissue engaged by an electrosurgical instrument during a medical procedure. Electrical power—a product of a voltage difference across and an electrical current conducted by the engaged biological tissue—is controlled according to a therapeutic schedule. The electrotherapeutic schedule can be reduced or terminated in response to a termination criterion being met. In some examples, the termination criterion is a current characteristic, such as, for example, a decrease in current conducted by the engaged biological tissue. In some examples, the termination criterion is a biological tissue resistance characteristic, such as, for example, an increase in the biological tissue resistance that exceeds a predetermined delta resistance value.

Various systems and methods for determining the state of an end effector of an ultrasonic surgical instrument are disclosed. A control circuit can be configured to measure a complex impedance of an ultrasonic electromechanical system including an ultrasonic blade and compare the measured complex impedance to reference complex impedance patterns that each correspond to a state of the end effector. Accordingly, the control circuit can further be configured to determine the state of the end effector according to which of the plurality of reference complex impedance patterns the measured complex impedance corresponds.

An isolating circuit for electrosurgical generator arranged to produce radiofrequency (RF) energy and microwave energy for treating biological tissue. The generator has an RF channel and a microwave channel which are combined at signal combiner to enable the RF energy and microwave energy to be delivered into tissue along a common feed path. The isolating circuit comprises a tunable waveguide isolator at a junction between the microwave channel and signal combiner, and can include a capacitive structure between a ground conductor of the signal combiner and a conductive input section of the waveguide isolator to inhibit coupling of the RF energy and leakage of the microwave energy. The isolating circuit can combine into a single tunable unit all the necessary components to isolate the microwave and RF channels from one another whilst providing a high withstanding voltage.

An unattended approach can increase the reproducibility and safety of the treatment as the chance of over/under treating of a certain area is significantly decreased. On the other hand, unattended treatment of uneven or rugged areas can be challenging in terms of maintaining proper distance or contact with the treated tissue, mostly on areas which tend to differ from patient to patient (e.g. facial area). Delivering energy via a system of active elements embedded in a flexible pad adhesively attached to the skin offers a possible solution. The unattended approach may include delivering of multiple energies to enhance a visual appearance.

A microwave generator includes a microwave signal generator configured to deliver a microwave signal to a microwave instrument coupled to the microwave generator and a generator controller storing a plurality of resistance value indicators. A device ID reader is configured to measure a resistance of the coupled microwave instrument. The generator controller is configured to compare the measured resistance of the coupled microwave instrument with the plurality of resistance value indicators to identify a type of the coupled microwave instrument. An instrument monitoring controller is configured to communicate a data request to the coupled microwave instrument based on the identified type of the coupled microwave instrument. The generator controller is configured to set at least one operating threshold of the microwave generator based on one of an operating configuration corresponding to one of the plurality of resistance value indicators or data communicated from the coupled microwave instrument.

Various systems and methods for controlling an ultrasonic surgical instrument according to the location of tissue grasped within an end effector are disclosed. A control circuit can be configured to apply varying power levels, via a generator, to an ultrasonic transducer driving an ultrasonic electromechanical system to oscillate an ultrasonic blade. Further, the control circuit can measure impedances of the ultrasonic transducer corresponding to the varying power levels and determine a location of tissue positioned within the end effector according to a difference between the impedances of the ultrasonic transducer relative to a threshold.

Abstract: An electrosurgical method is provided to seal biological tissue comprising providing RF power to the tissue during an RF power delivery time interval comprising: measuring a change in impedance of the tissue with respect to RF energy delivered to the tissue during an initial portion of the time interval; selecting an RF power delivery profile, based at least in part upon the measured change in impedance of the tissue with respect to RF energy delivered to the tissue; and imparting RF power to the tissue according to the selected RF power delivery profile during a latter portion of the time interval.

A single non-thermal atmospheric plasma generation device is used to detect and analyze vital fields of a living subject to determine the presence of a condition, such as an illness or injury, and responsively modify characteristics of the plasma to treat, heal, or alleviate the condition. The device includes a capacitance dielectric discharge array of plasma emitters, and a controller having a power supply, a transformer, and circuit components for driving the transformer at a resonant frequency of the plasma emitters to cause the plurality of plasma emitters to ionize surrounding air and produce the non-thermal plasma. The resonant frequency is around 60 GHz and harmonics thereof. A receiver of the device recovers frequency mixing products from the plasma, which are extracted by signal processing circuitry; signals in the VHF and UHF bands are extracted and analyzed to determine whether signatures of particular vital fields are present.