A catheter system includes a shaft main body including an elongated hollow outer tube and an inner tube accommodated in the inside of the elongated hollow outer tube. The hollow inside of the inner tube is suctioned from the proximal end side thereof. The outer tube has an opening formed in a circumferential surface thereof and an attaching portion provided therein on the distal end side with respect to the opening. The inner tube can move in an axial direction with respect to the outer tube, and at least a distal end side end portion thereof can move back and forth between a proximal end side position with respect to the opening and the attaching portion. The inner tube has a cutting unit provided in the hollow inside of the distal end side end portion thereof and is capable of attaching to the attaching portion

A device suitable for removing material from a living being is provided, featuring at least an aspiration pump, powered by a motor. The aspiration pump and any optional infusate pump preferably feature a helical pumping mechanism, and operate at a high rate of rotation, thereby ensuring adequate pumping performance and flexibility. The helical pumping mechanism may be a helical coiled wire about a central core tube. The helical coil wire, whether together with, or independent of, the core tube, may be rotated to cause a pumping action. Additionally, a narrow crossing profile is maintained, ensuring that the device may reach more tortuous regions of the vasculature. In one embodiment, the system comprises a wire-guided mono-rail catheter with a working head mounted on a flexible portion of the catheter that can laterally displace away from the guide wire to facilitate thrombus removal. The working head may be operated to separate and move away from the guide wire to come within a closer proximity of the obstructive material to more effectively remove it from the vessel.

The present disclosure generally relates to the field of medical devices for treatment and diagnosis of paranasal sinus conditions and methods of using same. There is disclosed a device having a hollow shaft configured to be inserted into a paranasal sinus through a natural opening thereof. The hollow shaft is shaped/configured to reach a treatment area within the paranasal sinus.

A method of reducing blood flow within an aneurysm includes: injecting a contrast agent into a blood vessel including an aneurysm; expanding a stent, from a delivery device, across the aneurysm; and confirming that a stagnated area forms in the aneurysm. The stagnated area can form a crescent shape, a mushroom shape, a hemispherical shape, and/or a flat side. Upon confirming that the stagnated area forms in the aneurysm, the delivery device can be withdrawn from the blood vessel. The stagnated area can include the contrast agent. If the stagnated area does not form in the aneurysm, a second occluding device may be deployed. After withdrawing the delivery device, substantially all of the aneurysm progressively thromboses.

Rotational atherectomy devices and systems can remove or reduce stenotic lesions in blood vessels by rotating one or more abrasive elements within the vessel. The abrasive elements are attached to a distal portion of an elongate flexible drive shaft that extends from a handle assembly that includes a driver for rotating the drive shaft. In particular implementations, the handle assembly encapsulates an electric motor assembly, a pump assembly, and a controller assembly.

The present invention is directed to material removal instrument for forming cavities in interior body regions, particularly cavities in intervertebral discs and vertebrae. The instrument includes a cannula and a rotation mechanism disposed at least partially within the cannula. A cutting element extends from the rotation mechanism and impacts and dislocates tissue as the rotation mechanism is rotated within the body. Dislocated tissue with withdrawn from the body via the cannula.

An improved plaque extractor for shaving, scooping, cutting, and emulsifying accumulated plaque from blood vessels into fine particles, and removing the particles from blood vessel walls without cutting or permanently stretching the walls, and without substantially blocking the blood flow through the vessel during plaque removal operation. The plaque extractor includes an extractor guide and an internal auger, in which both are rotating and moving axially inside the vessel to engage the occlusive material. The operation of the device does not substantially disrupt blood pressure within the blood vessel.

A medical device that removes an object in a body lumen, includes a rotatable drive shaft, a cutter attached to a distal portion of the drive shaft and by which the object is cut, an outer tube surrounding the drive shaft, a guide wire tube attached to a distal portion of the outer tube and having a guide wire lumen therein, a metal member attached to the guide wire tube and including a first portion that extends along the guide wire tube and includes a first recess, and a distal tip made of a resin, disposed at a distal portion of the guide wire tube, and having a distal lumen that communicates with the guide wire lumen. The distal tip engages with the first recess of the metal member.

A thrombectomy system is provided that, in various embodiments, a rotating impeller that may be translated within limits along a guidewire and within a catheter. The rotating impeller is, during operation, either located entirely inside or outside of the distal end of the catheter's lumen or at least partially outside of the distal end of the catheter's lumen. In some cases, the impeller may be prevented from rotating if at least partially inside the catheter's lumen. The rotating impeller may achieve a working diameter that is greater than its resting diameter.

A platform device for material excision or removal from vascular structures for either handheld or stereotactic table or robotics platform use may comprise a work element or elements configured to selectively open and close at least one articulable beak or scoopula configured to penetrate and remove intra-vascular materials or obstructions, or follow a central lumen of another device or over a wire in a longitudinal direction. Flush and vacuum tissue transport mechanisms may be incorporated as well as single or multiple arrays of image guidance elements, directional elements, ablation elements and other interventional assistance elements. A single tube or an inner sheath and an outer sheath which may be co-axially disposed relative to a work element may be configured to actuate a beak or beaks or scoopulas and provisions for simultaneous or differential beak or scoopula closing under their differential rotation may be incorporated.