A method and device for controlling a treatment procedure includes a treatment tool, an energy source, and a controller. The controller controls the energy source such that in a first treatment phase, power fed into the material to be treated is controlled with an increasing course. An impedance detector determines the impedance course and/or the present impedance of the material to be treated, and recognizes the achievement of an impedance minimum. A timer is started upon recognition of an impedance minimum, and upon recognition of a further impedance minimum within the specific time interval, the timer is reset. If no new impedance minimum is detected within the specific time interval and the time interval expires, the controller switches the power control to constant power or to a power course with an altered gradient. Upon fulfilling a specific criterion, there is a switchover from power control to voltage control.

An electrosurgical generator which outputs high-frequency AC voltage for an electrosurgical instrument includes a leakage current detecting device for the connected electrosurgical instrument. The leakage current detecting device is embodied as a voltage measuring device, the inputs of which are connected in each case via a capacitive coupling to an active and a neutral line of the output line and which has a bipolar voltage divider having a predetermined fixed ratio. An asymmetry detector connected via a capacitive coupling compares upper and lower voltage at the voltage divider, and outputs a fault signal for leakage current in the case of deviation of the ratio of upper to lower voltage from the predetermined fixed ratio.

A method for constructing a modular surgical system is disclosed. The method comprises providing a header module comprising a first power backplane segment, providing a surgical module comprising a second power backplane segment, assembling the header module and the surgical module to electrically couple the first power backplane segment and the second power backplane segment to each other to form a power backplane, and applying power to the surgical module through the power backplane.

Systems, devices, and methods for transvascular ablation of target tissue. The devices and methods may, in some examples, be used for splanchnic nerve ablation to increase splanchnic venous blood capacitance to treat at least one of heart failure and hypertension. For example, the devices disclosed herein may be advanced endovascularly to a target vessel in the region of a thoracic splanchnic nerve (TSN), such as a greater splanchnic nerve (GSN) or a TSN nerve root. Also disclosed are methods of treating heart failure, such as HFpEF, by endovascularly ablating a thoracic splanchnic nerve to increase venous capacitance and reduce pulmonary blood pressure.

A system includes an intravascular medical device and a therapeutic medical device. The intravascular medical device includes a heat therapy assembly and an elongated member coupled to the heat therapy assembly. The heat therapy assembly is configured to expand a vessel beyond an initial size of the vessel and deliver energy to a wall of the expanded vessel to heat the wall of the vessel. The therapeutic medical device is communicatively coupled to the heat therapy assembly and configured to control the heat therapy assembly to deliver the energy to ablate smooth muscle cells of the wall of the vessel and substantially denature one or more structural proteins of the wall of the vessel.

A system includes an intravascular medical device and a therapeutic medical device. The intravascular medical device includes a heat therapy assembly and an elongated member coupled to the heat therapy assembly. The heat therapy assembly is configured to contract a wall of a vessel and deliver energy to the wall of the contracted vessel to heat the wall of the vessel. The therapeutic medical device is communicatively coupled to the heat therapy assembly and configured to control the heat therapy assembly to deliver the energy to ablate smooth muscle cells of the wall of the vessel and substantially denature one or more structural proteins of the wall of the vessel.

A method for determining parameters for operating a light source within a photo-thermal targeted treatment system is disclosed. The method includes cooling a treatment location, administering first laser pulses at the treatment location, the first laser pulses having thermal energy below a known damage threshold, tracking skin surface temperatures at the treatment location while administering the first laser pulses, estimating a relationship between parameters for operating the light source and the skin surface temperature by fitting tracked skin surface temperature to a correlation model, determining a safe operating range for the light source to avoid thermal damage at the treatment location while still effectively targeting the chromophore, administering second laser pulses at the treatment location, the second laser pulses staying within the safe operating range for the light source, and adjusting the light source according to the tracked skin surface temperatures to stay within the safe operating range.

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.

A light source (2) including a plurality of LEDs (4); a light detector (3) that detects intensity of light emitted by the plurality of LEDs (4) as light intensity distribution of light emitted by the light source (2); and a light intensity distribution control circuit (6) that controls current, by which each of the plurality of LEDs (4) is driven, such that the intensity of the light emitted by each of the plurality of the LEDs (4), which is detected by the light detector (3), falls within a predetermined range.

A surgical clip applier is disclosed which is configured to automatically feed a clip from a clip cartridge once the surgical clip applier is positioned in the patient.