In one embodiment of the present invention, a method of applying ultrasonic energy to a treatment site within a patient's vasculature comprises positioning an ultrasound radiating member at a treatment site within a patient's vasculature. The method further comprises activating the ultrasound radiating member to produce pulses of ultrasonic energy at a cycle period T1 second. The acoustic parameters such as peak power, pulse width, pulse repetition frequency and frequency or any combination of them can be varied non-linearly.

Described here are devices and methods for forming shock waves. The devices may comprise an axially extending elongate member. A first electrode pair may comprise a first electrode and a second electrode. The first electrode pair may be provided on the elongate member and positioned within a conductive fluid. A controller may be coupled to the first electrode pair. The controller may be configured to deliver a series of individual pulses to the first electrode pair, where each pulse creates a shock wave. The controller may cause current to flow through the electrode pair in a first direction for some of the pulses in the series and in a second direction opposite the first direction for the remaining pulses in the series.

A tissue-removing catheter for removing tissue from a body lumen during a cutting operation includes an elongate catheter body configured for insertion into the body lumen and a tissue-removing element. A motor is operably connected to the tissue-removing element for rotating the tissue-removing element. A sensor is configured to detect a parameter of the catheter body during the cutting operation. A motor control circuit is in electrical communication with the sensor and the motor. During an operational control function, the motor control circuit is configured to receive a signal from the sensor based at least in part on the detected parameter, determine whether the received signal is indicative of inefficient movement of the tissue-removing element, and adjust a rotational speed of the tissue-removing element to increase efficiency of the tissue-removing element if the received signal is indicative of inefficient movement of the tissue-removing element.

The invention relates to a method for providing control data for an ophthalmological laser (12) of a treatment apparatus (10). As steps, the method includes determining an anterior (14) and a posterior (16) interface in a cornea (17) of a human or animal eye; determining a transition zone, in which the interfaces (14, 16) are connected to each other, wherein transition positions (24) are determined on the anterior interface (14), from which an incision progression of the anterior interface (14) is changed towards the posterior interface (16), and wherein transition positions (26) are determined on the posterior interface (16), at which an incision progression of the posterior interface (16) is changed towards the anterior interface (14), such that the respective incision progressions of the interfaces (14, 16) converge and connect to each other in the transition zone; and providing control data for controlling the ophthalmological laser (12), which includes the interfaces (14, 16) and the incision progression of the transition zone.

A laser treatment system comprising a plurality of laser devices disposed on a cart, a combiner coupled to the plurality of laser devices, the combiner configured to combine a plurality of laser signals from the plurality of laser devices into a single conducting medium and a treatment head coupled to the conducting medium, the treatment head configured to deliver the plurality of laser signals to a predetermined location.

A pulse control method and apparatus, an ablation device (110) and system (100), and a storage medium. The pulse control method comprises: controlling a pulse generator (112) to output a nanosecond pulse sequence and a millisecond pulse sequence, the amplitude of the nanosecond pulse sequence being greater than a preset first threshold voltage, and the amplitude of the millisecond pulse sequence being less than a preset second threshold voltage. The nanosecond pulse sequence having the amplitude greater than the threshold voltage cooperates with the millisecond pulse sequence having the amplitude less than the threshold voltage, such that the effective ablation range can be enlarged, the ablation is more thorough, the muscle contraction amplitude can be effectively reduced, or the muscle contraction probability is reduced, the treatment experience feeling of a patient can be improved, and the use of anesthetics can be reduced or even not needed.

A surgical instrument having a shaft, an end effector, a firing system, and a control system is disclosed herein. The firing member is configured to translate an electric motor through a firing stroke. The control system includes a pulse width modulation circuit configured to adjust a duty cycle of voltage pulses to drive the firing system to a target speed. The control system includes a control circuit configured to evaluate the duty cycle of pulses at a predetermined adjustment point and set the target speed based at least in part on the comparison (maintain or new speed). The controls system may be configured to set the target speed at two or more adjustment points during the firing stroke and/or evaluate the duty cycle of pulses at an adjustment point more than half way through the firing stroke.

Various embodiments of the systems, methods, and devices are provided for controlled operation of an intravascular lithotripsy (IVL) system for breaking up calcified lesions in an anatomical conduit. More specifically, control arrangements are disclosed concerning managing and/or providing electrical energy to generate an electrical arc between a set of spaced-apart electrodes disposed within a fluid-fillable member, wherein the IVL system may be powered by an AC power source and/or a DC power source.

Reperfusion injury is limited during endovascular therapies (e.g., revascularization and/or reperfusion of end organ tissues) by conditioning the tissues against reperfusion injury using an optical fiber catheter to deliver far red and near infrared (R/NIR) light to the tissues. The light may be multiple wavelength or single wavelength light, and may have one or more wavelengths selected from the range of 510 to 830 nm. The R/NIR light may be delivered concurrently with the endovascular therapy, or in other instances may be delivered before or after a particular therapy.

Medical apparatuses with selectively dimmable displays are disclosed herein. Some embodiments include a housing, a laser surgical handpiece device, a laser source that generates laser light that is emitted through the laser surgical handpiece device, an electroluminescent display associated with the housing, the electroluminescent display being configured to display operational settings for the laser source, the operational settings including at least power level and pulse width or duration, and a microprocessor for controlling the electroluminescent display to selectively illuminate or dim at least a portion of the operational settings displayed thereon based on the operational settings selected by a user.