Disclosed are a radio-frequency ablation catheter having a spiral structure and device thereof. The radio-frequency ablation catheter has an elongated catheter body. A spiral electrode support is arranged at the front end of the catheter body. Multiple electrodes are arranged on the electrode support. A control handle is arranged at the rear end of the catheter body. Wall-attachment adjusting wires having various structures can be arranged in the radio-frequency ablation catheter, so that the radio-frequency ablation catheter having a spiral structure can be adapted to target vessels of different diameters, and so that the electrodes on the electrode support have a good wall-attachment state.

An apparatus includes a catheter shaft assembly and an end effector. The end effector includes a first flex circuit assembly, which includes a base member extending distally from the distal end of the catheter shaft assembly. The first flex circuit assembly further includes a plurality of obliquely extending members extending obliquely from the base member. The obliquely extending members are configured to transition between a first configuration and a second configuration. The obliquely extending members are configured to fit within an outer sheath in the first configuration. The obliquely extending members are configured to expand outwardly away from the longitudinal axis in the second configuration when exposed distally relative to the distal end of the outer sheath. The first flex circuit assembly further includes a plurality of electrodes positioned on at least some of the obliquely extending members, the electrodes being positioned to contact tissue or blood.

A surgical forceps includes a housing having a shaft attached thereto and an end effector assembly disposed at a distal end of the shaft. The end effector assembly includes first and second jaw members having opposed seal plates, each of the seal plates having a width. At least one of the jaw members is moveable from an open position to a closed position for grasping tissue therebetween. A sensing component is configured to determine an output relating to a diameter of tissue or a composition of tissue disposed between the opposed seal plates of the first and second jaw members. An expanding component is configured to expand the width of at least one of the opposed seal plates according to the determined output.

A surgical system for performing a capsulotomy of a lens capsule of an eye includes an elastic ring, a suction cup, an interface, a converter, and a control console. The elastic ring includes a conductive surface. The interface may be coupled to an air port and/or a fluid line of a phacomachine. The converter detects a pulse of air from the phacomachine via the interface, and produce an electrical signal in response. Fluid received from the phacomachine is delivered into the suction cup. The system is configured to remove the fluid from the suction cup and between the suction cup and a surface of the eye to form a suction seal. The control console is configured to, in response to receiving the electrical signal, drive a series of electrical pulses through the conductive surface of the elastic ring, causing the elastic ring to perform a tissue cutting operation.

An end effector assembly of a forceps includes a first jaw with a tissue sealing surface and an electrode on the sealing surface, and a second jaw with a tissue sealing surface and an electrode on the sealing surface. The first jaw and the second jaw move between an open position and a closed position. The sealing surface of at least one of the first jaw and the second jaw has a rigid medial section and flexible lateral sections.

A system for assessing occlusion of a region to blood flow includes a catheter with an inflatable member, a first electrode configured for placement upstream of the inflatable member and the second electrodes configured for placement downstream of the inflatable member, the inflatable member configured for inflation to occlude the blood flow through the region. The system further includes a current/voltage source, a resistor and a voltmeter, wherein these components along with the first and second electrodes are configured to form an impedance measuring circuit configured to detect a change in impedance for indicating occlusion of the region to the blood flow.

The present invention relates to comprehensive systems, devices and methods for delivering energy to tissue for a wide variety of applications, including medical procedures (e.g., tissue ablation, resection, cautery, vascular thrombosis, treatment of cardiac arrhythmias and dysrhythmias, electrosurgery, tissue harvest, etc.). In particular, systems, devices, and methods are provided for treating a tissue region (e.g., a tumor) through application of energy using energy delivery devices with flexible and adjustable tips.

Ablation systems of the present disclosure facilitate the safe formation of wide and deep lesions. For example, ablation systems of the present disclosure can allow for the flow of irrigation fluid and blood through an expandable ablation electrode, resulting in efficient and effective cooling of the ablation electrode as the ablation electrode delivers energy at a treatment site of the patient. Additionally, or alternatively, ablation systems of the present disclosure can include a deformable ablation electrode and a plurality of sensors that, in cooperation, sense the deformation of the ablation electrode, to provide a robust indication of the extent and direction of contact between the ablation electrode and tissue at a treatment site.

Diagnostic and therapeutic medical devices and methods that include an elongate shaft, a balloon, a plurality of electrodes carried by the balloon, and electronics to electrically connect the electrodes to a proximal end of the shaft. The devices can include a visualization system within the balloon.

An irrigated balloon catheter for use in an ostium of a pulmonary vein, includes a flex circuit electrode assembly adapted for circumferential contact with the ostium when the balloon is inflated. Adapted for both diagnostic and therapeutic applications and procedures, the balloon catheter may be used with a lasso catheter or focal catheter. The flex circuit electrode assembly includes a substrate, a contact electrode on an outer surface of the substrate, the contact electrode having a “fishbone” configuration with a longitudinally elongated portion and a plurality of transversal fingers, and a wiring electrode on an inner surface of the substrate, and conductive vias extending through the substrate electrically coupling the contact electrode and the writing electrodes. Microelectrodes with exclusion zones are strategically positioned relative to the electrodes. The electrodes may also be split into electrode portions.