A frequency control method and system for an ultrasonic surgical tool. The frequency control method for an ultrasonic tool comprised: obtaining a maximum value of a phase difference between an operating voltage and an operating current of the ultrasonic surgical tool; determining whether the maximum value is less than zero, so as to obtain a first determination result; if the first determination result indicates that the maximum value is not less than zero, adjusting an operating frequency of the ultrasonic surgical tool to a frequency corresponding to the phase difference to zero; if the first determination result indicates that the maximum value is less than zero, subtracting a preset value from the maximum value to obtain a phase lock point; and adjusting, according to the phase lock point, the operating frequency of the ultrasonic tool. The frequency control method for an ultrasonic surgical tool solves a problem in which, in some situations where the phase of a self-resonant frequency does not exceed 0, ultrasonic surgical tools fail to operate normally, or operate inefficiently, thereby improving operation efficiency and stability of ultrasonic surgical tools.

Retrieval of material from vessel lumens can be improved by electrically enhancing attachment of the material to the thrombectomy system. The system can include a catheter having a distal portion configured to be positioned adjacent to a thrombus in a blood vessel, an electrode disposed at the distal portion of the catheter, and an interventional element configured to be delivered through a lumen of the catheter. The electrode and the interventional element are each configured to be electrically coupled to an extracorporeal power supply.

The invention relates to an electrosurgical apparatus for cutting and coagulating biological tissue. In particular, the present invention provides an electrosurgical generator arranged to generate radiofrequency (RF) electromagnetic (EM) energy and microwave frequency EM energy; wherein the electrosurgical generator is operable in each of a coagulation mode and a cutting mode, wherein in the coagulation mode the electrosurgical generator is arranged to deliver the RF EM energy and the microwave EM energy simultaneously in a coagulation composite waveform comprising a dominant microwave signal and a supplementary RF signal, and wherein in the cutting mode the electrosurgical generator is arranged to deliver the RF EM energy and the microwave EM energy simultaneously in a cutting composite waveform comprising a dominant RF signal and a supplementary microwave signal.

Methods and apparatuses provide a phacoemulsification probe, wherein the probe has a piezoelectric actuator coupled with a needle configured to be inserted into an eye of a patient; and a processor configured to sequentially drive the actuator electrically in a range of frequencies, to measure a respective electrical power input to the actuator at each of the frequencies in the range, to identify a frequency in the range of frequencies wherein a metric of the electrical power input is a maximum, and to estimate from the identified frequency a mechanical resonant frequency of the actuator, and to drive the actuator electrically at the mechanical resonant frequency.

Systems, methods, and instrumentalities are described herein for autonomous operation of a surgical device within a predefined boundary. A discrete signal associated with clamping control (e.g., closure of a clamping jaw) may be received by the surgical device. The discrete signal may be triggered by a healthcare professional or autonomously activated. The surgical device, in response to the discrete signal and based on an algorithm, may generate a continuous signal to cause a continuous application of force or deployment of an operation. The surgical device, based at least on a measurement associated with one of tissue, inrush current, or the distance between the smart energy device and the smart grasper may determine a safety adjustment associated with the operation of the surgical device.

An oscillating drive mechanism for a surgical tool includes a motor having a rotor, a crank assembly hub, a link secured to the crank assembly hub, a pivot shaft, a shuttle including an arcuate rack gear secured to the link so that rotation of the crank assembly hub provides reciprocating rotary motion to the arcuate rack gear about the pivot shaft. A gear is meshed with the arcuate rack gear and is secured to an output shaft, whereby rotational motion of the motor induces rotary oscillating motion to the output shaft.

A systemic human repair and enhancement system that provides stem cell therapy utilizing an apparatus and methods for administering a treatment schedule of non-invasive and drug-free narrow and specific 0.6180 Hz frequency continuous sine wave therapy to the patient's cells. The frequency therapy may be in-vivo and in-vitro applications. The frequency therapy stimulates systemic stem cell production, particularly at a tissue sites having loss of function due to a condition, aging, damage, and or disease. The frequency therapy system encompasses a narrow and specific ultra-low continuous sine wave frequency stimulation therapy that produces one or more of the enhanced cell production, release, viability, proliferation, migration and or engraftment of the human patient's own genetically compatible stem cells, and the therapy enhances the stem cell's secretions thereby safely enhancing the secretion's therapeutic effects during stem cell therapy and simultaneously systemically enhancing the patient's pre-existing cells and tissues.

An electrosurgical instrument has a power supply operatively coupled to an end effector. The end effector has a pair of jaws for effectuating an action on tissue positioned therebetween. The power supply is configured to input a first signal and a second signal to a buck-boost converter. The buck-boost converter is configured to transmit an output to an H-bridge circuit. The H-bridge circuit is configured to pass a signal to a resonant LC transformer circuit. The power supply is configured to transmit a power signal. The pair of jaws are operatively coupled to the power supply to receive the power signal, the power having no more than 80 Volts RMS, and less than 2 Amps RMS. The power is configured to seal the tissue positioned between the pair of jaws in 3 seconds or less.

The invention comprises an apparatus for performing cardiac ablation by electroporation comprising: an applicator comprising a plurality of electrodes (16) each operable in use to supply an electrical potential across cells within an area of tissue (12); and a means to control the waveform of the electrical potential supplied by the plurality of electrodes, configured to provide a biphasic, truncated waveform with leading and trailing edges of differing magnitude.

Retrieval of material from vessel lumens can be improved by electrically enhancing attachment of the material to the thrombectomy system. The system can include a catheter having a distal portion configured to be positioned adjacent to a thrombus in a blood vessel, an electrode disposed at the distal portion of the catheter, and an interventional element configured to be delivered through a lumen of the catheter. The electrode and the interventional element are each configured to be electrically coupled to an extracorporeal power supply.