Abstract:
A catheter 101 provides a proximal seal 102 against a guide catheter inner lumen 103 so that aspiration may be applied through a guide catheter 108 and thus take advantage of the large proximal lumen. The catheter 101 is a rapid exchange (RX) catheter with an exit port 105 that defines a transfer port for aspiration and provides a deliverability advantage of minimal frictional engagement with the guide catheter 108 proximal of the exit port 105. Aspiration can be applied to the lumen of the guide catheter 108 and is directed to and effective at the tip of the Rx aspiration catheter 101 due to the presence of flow a restrictor or seal 102 between the outer surface of the Rx aspiration catheter 101 and the inner guide catheter 108. This seals the lumen between the outside of the Rx aspiration catheter 101 and the inner surface of the guide catheter 03 and prevents backflow of blood into the tip of guide catheter 108 reducing the effectiveness of the aspiration. An expansile tip 112 of the Rx catheter 101 facilitates aspiration and retrieval of the clot 110 by expanding under load. The expansile tip 112 can also partially or fully occlude the vessel providing flow arrest and thereby improving aspiration effectiveness.
Abstract:
In one embodiment an aspiration system includes an elongate tubular member having a lumen; an aspiration catheter configured to be inserted through the lumen of the elongate tubular member, and including a tubular aspiration member having a proximal end, a distal end, and a lumen, and configured to at least partially extend out of the lumen of the elongate tubular member at the distal end of the elongate tubular member; an elongate support member coupled to the tubular aspiration member and extending between a proximal end of the aspiration catheter and the proximal end of the tubular aspiration member; and an annular sealing member coupled to the tubular aspiration member and configured to create a seal against an inner surface of the elongate tubular member, when a vacuum sufficient to cause aspiration is actively applied to the lumen of the elongate tubular member.
Abstract:
A system of devices for treating an artery includes an arterial access sheath adapted to introduce an interventional catheter into an artery and an elongated dilator positionable within the internal lumen of the sheath body. The system also includes a catheter formed of an elongated catheter body sized and shaped to be introduced via a carotid artery access site into a common carotid artery through the internal lumen of the arterial access sheath. The catheter has an overall length and a distal most section length such that the distal most section can be positioned in an intracranial artery and at least a portion of the proximal most section is positioned in the common carotid artery during use.
Abstract:
The invention relates to an inflatable perfusion and/or a filter balloon which is useful in a setting where prolonged balloon inflation is needed. The invention produces an inflatable balloons and which can open ports within its own body. The filter and perfusion balloon is designed with lumen in then the body of the balloon. A variation in the membrane structure has two filter membranes.
Abstract:
Catheters of the present disclosure include a catheter shaft and an expandable tip, which can retrieve materials slightly larger than an inner diameter of the catheter shaft. The tip may be expandable such that it can easily transform from a first size and shape to a second size and shape to aid in the retrieval of the materials (i.e., the thrombus, embolus, or foreign body). Catheter tips may be expanded by inflation, removal of a constraining member, or an input such as heat, light, or electrical energy.
Abstract:
New devices, systems, and methods are disclosed for preventing, treating, and/or at least minimizing ischemia and/or reperfusion injury by restoring and/or modulating blood flow, particularly in the cerebral vasculature where blood vessels are narrow and tortuous. These devices, systems, and methods make it possible for a clinician to adequately and systematically restore blood flow to ischemic tissue while simultaneously modulating the blood flow to minimize reperfusion injury.
Abstract:
Systems and methods are provided for removing an obstruction from a ureter using a catheter including a distal end sized for introduction into a ureter, an infusion lumen, and an aspiration lumen. An infusion tip is provided on the distal end that includes infusion ports communicating with the infusion lumen, and one or more aspiration ports communicating with the aspiration lumen. One or more sources of fluid and/or vacuum are connectable to the tubular member such that fluid is delivered into the infusion lumen and suction is delivered into the aspiration lumen. A controller is coupled to the source(s) to control delivery of fluid to generate a radially outward pressure against a wall of a ureter adjacent the infusion tip and to control suction through the aspiration port(s) to apply a suction force against a kidney stone located adjacent the infusion tip.
Abstract:
The present application relates to a catheter system for avoiding air embolisms in intracranial interventions. The catheter system has a first and a second catheter main body (12, 22), each with a longitudinal axis, a proximal end and a distal end. The catheter main bodies have several lumens and lumen openings and in each case an expandable structure (40,50) for blocking the bloodstream in blood vessels.