An apparatus for aiding the removal of cataracts in which an optical fiber delivers sufficient optical energy of the correct wavelength, pulse duration to achieve controlled non-thermal and non-acoustic dissolution of hard cataract tissue.

Techniques are provided for controlling an output laser pulse signal of a medical device. A control device defines a time duration of capacitive discharge to a laser device. The time duration corresponds to an intended energy of the output laser pulse signal. The control device generates a plurality of sub-pulse control signals. The sub-pulse control signals define a series of capacitive discharge events of the capacitor bank. The control device modulates one or more of a sub-pulse control signal period or a sub-pulse time duration of the sub-pulse control signals to modify the capacitive discharge of the capacitor bank to the laser device during the time duration.

A device (10) to occlude the left atrial appendage (1) of a heart of a subject comprises an implantable occlusion apparatus (30) configured for radial expansion upon deployment to fluidically occlude the left atrial appendage, an elongated catheter member (80) having a distal end attachable to the implantable occlusion apparatus for transluminal delivery of the implantable occlusion apparatus to the left atrial appendage, a tissue energising module (20) having a plurality of electrodes (26) disposed around a circumference of the implantable occlusion apparatus in which each electrode is configured to contact a wall of the left atrial appendage at a tissue focal point upon deployment of the implantable occlusion apparatus, and an electrical controller (40) including a pulsed field energy delivery generator operably attachable to an electrical power source (50) and the plurality of electrodes and configured to energise the electrodes in a pulsed field ablation modality. The electrical controller is configured to independently energise each of the plurality of electrodes to apply a non-uniform pulsed field ablation treatment circumferentially around the wall of the left atrial appendage.

A switching assembly for transferring trains of pulses, including a first terminal and a second terminal. A first plurality of first relays is connected in parallel, and have first contacts connected to the first assembly terminal, and second contacts. A first capacitor is connected in parallel with the first relays. A second plurality of second relays is connected in parallel, and have third contacts, and fourth contacts connected to the second assembly terminal. A second capacitor is connected in parallel with the second relays. A connection connects the second contacts to the third contacts. The pulses have amplitudes of at least 2 kilovolts. On activation of the first and second relays the first and second contacts connect and the third and fourth contacts connect, so that the first and second assembly terminals connect. On deactivation of the first and second relays the first and second assembly terminals disconnect.

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.

A multifiber assembly and methods of using the same in an endoscopic procedure for transmitting illumination light to, and a response signal reflected from, a target is disclosed. An exemplary device comprises a proximal end, and distal end, and a transition section between the proximal and distal ends. The proximal end includes a first connector to be connected to a light source and a second connector configured to be connected to a spectrometer. The distal end includes a shaft including at least two first optical fibers to transmit light and at least one second optical fiber to transmit a spectroscopic signal. The transition section can couple the first connector to the at least two first optical fibers, and to couple the second connector to the at least one second optical fiber.

An ultrasonic generator for a transducer is provided. The ultrasonic generator includes a function generator and a controller. The function generator is in signal communication with the transducer. The controller is in signal communication with the function generator and cooperates with the function generator to facilitate generation of a drive signal from the function generator to the transducer. An amplifier module is in signal communication with the function generator to amplify the drive signal.

A surgical laser system (100) includes a first laser source (140A), a second laser source (140B), a beam combiner (142) and a laser probe (108). The first laser source is configured to output a first laser pulse train (144, 104A) comprising first laser pulses (146). The second laser source is configured to output a second laser pulse train (148, 104B) comprising second laser pulses (150). The beam combiner is configured to combine the first and second laser pulse trains and output a combined laser pulse train (152, 104) comprising the first and second laser pulses. The laser probe is optically coupled to an output of the beam combiner and is configured to discharge the combined laser pulse train.

An ultrasonic processing apparatus is provided. The ultrasonic processing apparatus comprises an ultrasonic therapy transducer (ATA) adapted to generate focused ultrasonic waves; an ultrasonic imaging transducer (UID) connected to the ultrasonic therapy transducer; and an electronic system configured to control the ultrasonic therapy transducer so as to emit a pulse train of ultrasonic waves generating a cloud of cavitation bubbles (BC); control the ultrasonic imaging transducer so as to acquire at least one image of the region to be processed; acquire a plurality of echo signals of ultrasonic wave pulses emitted by the ultrasonic therapy transducer captured by the ultrasonic imaging transducer; process the plurality of echo signals so as to reconstruct an image of the cloud of cavitation bubbles; and display said image of the cloud of cavitation bubbles superposed on said image of the region to be processed. The processing includes spatio-temporal filtering.

Systems, devices, and methods for current control of energy delivery to ablate tissue are disclosed. A generator may include a set of electrode channels coupled to a set of electrodes during use. Each electrode channel from the set of electrode channels may include a first switch from a first set of switches and a second switch from a second set of switches. A set of energy sources may be coupled to a third set of switches. The third set of switches may be configured to switch from an OFF state to an ON state to couple the set of energy sources to the set of electrodes. A set of resistors may be coupled to the second set of switches. The second set of switches may be configured to switch from an OFF state to an ON state to couple the set of resistors to the set of electrodes.