Rail tension extraction devices and methods of extracting target(s) inside a patient's body are disclosed. The device includes a base assembly having a handle and an elongate base. The device additionally includes at least one magnet configured to engage a metallic target, and a capture element received in the base assembly and disposed adjacent to the at least one magnet. The capture element is configured to at least partially surround the metallic target engaged by the at least one magnet. The device further includes an outer tube configured to move relative to the elongate base between a locking position in which a distal end of the outer tube is adjacent the capture element and the at least one magnet to secure the metallic target therebetween, and an unlocking position in which the distal end of the outer tube is spaced from the capture element and the at least one magnet.

A system for fracturing a frame of a deployed prosthesis with ultrasonic vibration includes a shaft, a tip assembly, an ultrasonic electric generator, and an ultrasonic transducer. The shaft includes a proximal portion and a distal portion. The tip assembly is coupled to the distal portion of the shaft. The tip assembly includes a cutting edge. The ultrasonic transducer is electrically coupled to the ultrasonic generator. Ultrasonic vibration generated by the ultrasonic transducer is translated to the tip assembly. The cutting edge of the tip assembly is configured to focus the vibration of the tip assembly onto a frame of a deployed prosthesis to fracture the frame of the prosthesis. The ultrasonic transducer may be coupled to the proximal portion or the distal portion of the shaft.

In some examples, a catheter includes an elongated body comprising proximal and distal portions. The distal portion of the elongated body comprises an inner liner that includes a proximal liner section and a distal liner section that include different materials, and an outer jacket positioned over the inner liner. The distal liner section has a first hardness and the proximal liner section has a second hardness, where the first hardness is less than the second hardness.

The present disclosure relates generally to medical devices and the use of medical devices for the treatment of vascular conditions. Particularly, the present disclosure provides devices and methods for using a snaring system to remove an implanted lead from the vasculature. A snaring system comprises an outer sheath (710) having a lumen; an inner sheath (705); a pusher (745) disposed within the lumen of the sheath, wherein the pusher comprises a longitudinal axis; a closed loop (720) having an opening, wherein the closed loop comprises a proximal extended portion, an S-curve portion and a distal extended portion, wherein the proximal extended portion of the closed loop is coupled to the pusher, wherein the proximal extended portion is substantially parallel to the longitudinal axis to the pusher, wherein the pusher and the closed loop are slidable relative to the inner sheath, whereupon being in a deployed configuration, the closed loop is disposed distally of the sheath and the S-curve portion is disposed substantially perpendicular to the proximal extended portion, wherein the S-curve portion comprises a first radius and a second radius, wherein the first radius is closer to the proximal extended portion relative to the distal extended portion, wherein the second radius is closer to the distal extended portion relative to the proximal extended portion, wherein the first radius is greater than the second radius; and a threader (725) fixedly coupled to the inner sheath, whereupon the closed loop being pulled proximally, the closed loop collapses over the threader and the threader is disposed within the opening of the closed loop. In one embodiment, two opposing closed loops are provided.

An aspiration system includes a pump and a control system in communication with the pump. The control system includes a microcontroller, an antenna configured to receive a signal, and a pump control board in communication with the microcontroller. The antenna is in communication with the microcontroller. Upon receiving the signal, the pump control board operates the pump to create negative pressure according to the signal.

Components and corresponding systems are described for providing removal of a clot or fragment thereof to address an acute ischemic stroke condition. In particular, a filter design is presented that provides metal elements below a bundle of polymer fibers to provide more mechanical strength while cushioning the vessel wall from direct contact with the metal elements. Designs of stent retrievers are presented with polymer covers or mounted on the exterior of a microcatheter. Corresponding systems are described that can use various combinations of the components, generally in combination with an aspiration catheter. Corresponding procedures are described that can effectively use the various devices and systems.

An apparatus and method for capturing material within a body lumen are disclosed. The apparatus includes a core wire extending from a proximal end to a distal tip, an actuator member defining a lumen for receiving at least a portion of the core wire, and a distal basket having a distal enclosed end fixed relative to the core wire and one or more elements extending from a proximal open end to a collar slidable on the core wire. The collar is slidable on the core wire within an interior of the distal basket such that, when the collar contacts the actuator member, the collar applies an inward force to direct the proximal open end of the distal basket radially inwardly.

A foreign object removal device is disclosed, which includes a protective sheath, and a device main body, which is disposed in a lumen of the protective sheath, can protrude from a distal end opening of the protective sheath communicating with the lumen and is rotatable relative to the protective sheath. The device main body includes, at a distal end portion protruding from the distal end opening, a screw which rotates integrally with the device main body and in which a flat plate is twisted, and side edges of the flat plate are formed in a spiral shape.

A device for retrieval of a vena cava filter is provided. The retrieval device has, approximately, an umbrella shape and consists of a central shaft; a plurality of frame struts, attached to frame strut attachment points on the central shaft and disposed radially about the central shaft; and a plurality of snare wires. The retrieval device has a collapsed configuration for insertion and removal from a blood vessel of a patient and an expanded state for capturing an intravascular filter in the blood vessel of the patient. The plurality of snare wires provides multiple points at which a vena cava filter, particularly one that has become misaligned during deployment or treatment, can be caught. The frame struts can be substantially sinusoidal in shape and made of shape memory metal, such as Nitinol. The snare wires can be made of a biocompatible material such as silk, polyester, polypropylene, or nylon.

The present disclosure provides a lead locking device that is configured to be inserted into a lumen of a lead of a cardiac implantable electronic device (CIED), such as a lead of a pacemaker, and being locked at a selected position along the lumen for being retained there for allowing extraction of the lead and/or applying vibrations to the selected position. The lead locking device includes a deformable element that may deform by application of force thereon and the deformation thereof results in radial expansion thereof such that if it is disposed within a lumen of a lead, it presses against the walls of the lumen and applies force that retains the lead locking device in position. The deformable element may be configured for reversible deformation, namely that upon removal of the force that is applied thereon, it is reversed to a contracted, non-engaging state where its radial dimension is lower than the dimension of the lumen. The deformable element may be in the form of a metallic braid, a flexible rod or a wire, an inflatable member, a spring, a structural weakening portion in a body member, such as cuts or holes, allowing a portion of the body to expand, etc.