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.

Tissue treatment systems and methods are disclosed. In an embodiment, a tissue treatment system includes a LV signal generator, a HV signal generator, and a controller. The LV signal generator is used to produce a LV tissue impedance measurement signal, and the HV signal generator is used to produce a HV tissue treatment signal having a voltage that is at least five times greater than a voltage of the LV tissue impedance measurement signal. The controller controls when the HV tissue treatment signal produced using the HV signal generator, and when the LV tissue impedance measurement signal produced using the LV signal generator, are delivered to patient tissue via an active electrode and a return electrode. The LV tissue impedance measurement signal is used to estimate the impedance of the patient tissue, which is used to control the voltage and/or current of the HV tissue treatment signal.

Systems, devices and methods treat target tissue to provide a therapeutic benefit to the patient. A tissue treatment device comprises a tissue treatment element constructed and arranged to treat target tissue, such as duodenal mucosa and/or submucosal tissue. Patients treated can safely eliminate or reduce their daily insulin intake.

An ultrasonic surgical tool system for actuating a handpiece with a tip. The frequency of the drive signal applied to the handpiece drivers is a function of the equivalent of current through the mechanical components of the handpiece and tip and the frequency responsiveness of these components.

A surgical instrument system comprising a first motor, a second motor, and a third motor is disclosed. The surgical instrument system comprises a first handle comprising a first number of controls, a second handle comprising a second number of controls, and a shaft assembly. The shaft assembly is attachable to the first handle in a first orientation in order to engage one of the motors. The shaft assembly is attachable to the second handle in a second orientation to engage a different motor. The surgical instrument system is configured to perform a different function of an end effector in the first orientation and the second orientation.

Provided is a high frequency hyperthermia device which includes a main body (110) which includes a high frequency generator (114) which generates high frequency currents using drive power, a hand piece (120) which is connected to the main body (110) through a cable (140) and in which a handle (121) to be gripped by a user is disposed on an upper portion of the hand piece (120), and four or more contact electrodes (122), through which the high frequency currents being supplied are applied to skin (S) in contact with the contact electrodes (122) to generate deep heat in an internal body, are disposed on a lower surface of the hand piece (120), and an alternating switch (130) which is disposed between and connected to the high frequency generator (114) and the contact electrodes (122) in a circuit manner and which supplies the high frequency currents output from the high frequency generator (114) to the contact electrode (122), wherein the contact electrodes (122) are divided into pairs each having two contact electrodes (122), and the high frequency currents are alternately supplied to the pairs at a first speed.

An electrosurgical system monitors and visually indicates a degree of contact between a return electrode and a patient's skin. The system includes an electrosurgical generator and a return pad. The return pad includes a return electrode, a lighting element, and a cable electrically and mechanically coupling the return electrode to the generator. The lighting element is configured to emit light based on the degree of contact between the return electrode and the patient's tissue (e.g., skin).

Systems, devices and methods treat target tissue to provide a therapeutic benefit to the patient. A tissue treatment device comprises a tissue treatment element constructed and arranged to treat target tissue, such as duodenal mucosa and/or submucosal tissue. Patients treated can safely eliminate or reduce their daily insulin intake.

Methods and systems for modulating intraosseous nerves (e.g., nerves within bone) are provided. For example, the methods and systems described herein may be used to modulate (e.g., denervate, ablate) basivertebral nerves within vertebrae. The modulation of the basivertebral nerves may facilitate treatment of chronic back pain. The modulation may be performed by a neuromodulation device (e.g., an energy delivery device).

An electrosurgical device with an electrode having a first portion whose exterior is electrically uninsulated, a second portion whose exterior is electrically insulated, and a third portion. The device includes an elongated hollow body formed by a first member and a second member. The second member is capable of rotating relative to the first member. The hollow body has an internal cavity, a front end, a rear end, an external surface, and an electrical wire arranged within the body. The hollow body is configured to reversibly receive the third portion of the electrode at the front end of the body such that electrical contact is made between the electrode and the electrical wire and the second portion of the electrode is not surrounded by the hollow body. A first button is provided for controlling a current flow at a first level to the electrode and is arranged on the external surface. A vacuum tube is slidably engaged by the body and has an inlet generally facing the front end and adjacent the electrode. A vacuum outlet port is arranged near the rear end of the body, and the outlet port, internal cavity, and vacuum inlet are in fluid communication with each other.