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.

An ultrasonic surgical instrument and method of sealing a tissue includes generating a desired burst pressure in the tissue, sealing the tissue, verifying that the tissue is sealed with further application of at least one of the ultrasonic energy and the RF energy. The ultrasonic surgical instrument further includes an end effector having an ultrasonic blade, an RF electrode, and a controller. The controller operatively connects to the ultrasonic blade and the RF electrode and is configured to direct application of ultrasonic and RF energies according to an initial phase, a power phase, and a termination phase for respectively generating a desired burst pressure in the tissue, sealing the tissue, and verifying the sealing of the tissue while inhibiting transection of the tissue.

An end effector for an electrosurgical instrument is disclosed which includes a first jaw, a first energy delivery surface, a first distal end, and a first proximal end. A second jaw of the end effector includes a second energy delivery surface, a second distal end, and a second proximal end. The end effector also includes an electrically conductive gap setting member which defines a distal gap distance between the first and second energy delivery surfaces. At least one pivot is fixed to one of the jaws to set a proximal gap distance between the first and second energy delivery surfaces. A method for making an end effector and a method for assembling an end effector for an electrosurgical instrument are also disclosed.

An end effector for an electrosurgical instrument is disclosed which comprises a first jaw comprising a first energy delivery surface, a first distal end, and a first proximal end; and a second jaw comprising a second energy delivery surface, a second distal end, and a second proximal end, wherein the first energy delivery surface comprises a first curved portion that is outwardly curved, and the second energy delivery surface comprises a second curved portion that is inwardly curved. The first jaw or the second jaw is configured for pivotal movement between an open position and a closed position. In the open position, the first and second distal ends are separated apart. In the closed position, the first and second distal ends are in proximity. The end effector also comprises an electrically conductive member which protrudes from either the first or second jaw.

An operation method of an electric power source device for operating a high-frequency treatment instrument configured to perform a high-frequency treatment on a biological tissue includes causing a high-frequency electric power source circuit to output electric power; specifying an initial state of the biological tissue; acquiring a value relating to an impedance of the biological tissue; determining an additional impedance value based on the initial state; setting a stop impedance value which is the sum of the additional impedance value and a change-over impedance value; and causing the high-frequency electric power source circuit to stop the output, if the value relating to the impedance reaches the stop impedance value after the value relating to the impedance reached the change-over impedance value.

A microneedling system may reciprocate a plurality of microneedles disposed on a handpiece into the skin of a patient. The handpiece may have a plurality of positive and negative electrodes in the form of microneedles or surface electrodes arranged across an array. The microneedles and/or electrode plates may deliver RF energy to the patient for inducing collagen coagulation and regeneration. The electrodes may be arranged such that each electrode is positioned adjacent a closest electrode of opposite polarity. There may be an uneven number of positive and negative electrodes. Central electrodes may be surrounded by at least three adjacent closest electrodes of opposite polarity. The electrodes may be arranged in a hexagonal or other polygonal manner. The electrodes may be arranged to provide uniform distribution of energy, heating, and effectively to some extent damage the entire discrete area that encloses the positive and negative electrodes.

A surgical instrument has an ultrasonic blade that connects to a distal end of an ultrasonic waveguide. A clamp arm assembly is moveable from an opened position for receiving a tissue, toward a closed position for clamping the tissue. A clamp arm actuator connected to the clamp arm assembly directs the clamp arm assembly from the opened position toward the closed position. An outer sheath surrounds at least a portion of the ultrasonic waveguide. The outer sheath includes a cover removably received against a sheath body, and a sheath securement feature able to detachably couple the cover to the sheath body such that the cover can be detached from the sheath body for accessing the ultrasonic waveguide within the outer sheath.

The invention provides a therapeutic system comprising: a console, wherein the console comprises a controller and an energy generator; a therapeutic device comprising: an operational head configured for transmitting the energy output from to a biological tissue; and a memory device comprising control instructions, wherein said control instructions comprise instructions for controlling the console; a reversible memory operable linkage linking the memory device to the controller; and a reversible connector configured for operably linking the energy generator to the operational head. Optionally, the energy generator is a generator of ablation energy or heat energy (e.g. RF generator) and the control instructions comprise instructions for controlling the output of the energy generator. Optionally, the control instructions comprise one or more parameters of energy output or an algorithm configured for controlling the energy output. Optionally, the system further comprises one or more secondary therapeutic devices and the control instructions comprise instructions for controlling the one or more secondary therapeutic devices. Optionally, the system further comprises one or more sensors configured for sensing parameters of energy output or biological or environmental effects of the energy output and the control instructions comprise instructions for controlling the energy output and/or secondary therapeutic devices based on the parameters of energy output or biological or environmental effects. In some embodiments, one advantage provided by the present invention is the use of a single console with a plurality of interchangeable reversibly connected therapeutic devices.

A power supply device for high frequency treatment instrument to treat living tissue includes an output unit to supply high frequency power to the treatment instrument's electrode, a distance information acquisition unit to acquire a distance between the living tissue and the electrode, a determination unit to determine whether the distance satisfies a first condition, and an output control unit to control the output unit so that its output is placed in a controlled state if the distance satisfies the first condition and so that the output is set to a first output level higher than an output level in the controlled state if a second condition is satisfied after the output is placed in the controlled state.

An electrosurgical device capable of both: (i) generating a radiative microwave field to perform either blood coagulation or sterilization, and (ii) dispensing a liquid to a target area, e.g. adrenaline for the treatment of peptic ulcers. Using microwave energy allows controlled coagulation which is unaffected by changes in tissue impedance during coagulation, and which can achieve a high level of coagulation within a given time. The electrosurgical device comprises a probe tip having a coaxial transmission line that includes a hollow inner conductor having a dielectric material formed on an inner surface thereof. A liquid-conveying channel is located inside the dielectric material. The probe tip includes a conductive element coupled to receive microwave energy from the coaxial transmission line, the conductive element forming a radiating antenna structure for emitting a microwave EM field outwardly from the probe tip.