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503 results about "Embolus" patented technology

An embolus (/ˈɛmbələs/; plural emboli; from the Greek ἔμβολος "wedge", "plug") is an unattached mass that travels through the bloodstream and is capable of clogging arterial capillary beds (create an arterial occlusion) at a site distant from its point of origin. There are a number of different types of emboli, including blood clots, cholesterol plaque or crystals, fat globules, gas bubbles, and foreign bodies.

Emboli protection devices and related methods of use

An evacuation sheath assembly and method of treating occluded vessels which reduces the risk of distal embolization during vascular interventions is provided. The evacuation sheath assembly includes an elongated tube defining an evacuation lumen having proximal and distal ends. A proximal sealing surface is provided on a proximal portion of the tube and is configured to form a seal with a lumen of a guided catheter. A distal sealing surface is provided on a distal portion of the tube and is configured to form a seal with a blood vessel. Obturator assemblies and infusion catheter assemblies are provided to be used with the evacuation sheath assembly. A method of treatment of a blood vessel using the evacuation sheath assembly includes advancing the evacuation sheath assembly into the blood vessel through a guide catheter. Normal antegrade blood flow in the blood vessel proximate to the stenosis is stopped and the stenosis is treated. Retrograde blood flow is induced within the blood vessel to carry embolic material dislodged during treating into the evacuation sheath assembly. If necessary to increase retrograde flow, the coronary sinus may be at least partially occluded. Alternatively, antegrade flow may be permitted while flow is occluded at the treatment site.
Owner:ST JUDE MEDICAL CARDILOGY DIV INC

Devices and methods for aspirating from filters

A method and apparatus for aspirating emboli and other particles from a vascular filter within a patient's vasculature. The aspiration catheter comprises an elongate body with an aspiration lumen having an aspiration port at the distal end and a guidewire lumen for receiving a guidewire. The aspiration lumen extends substantially beyond the distal end of the guidewire lumen such that the aspiration port may be,inserted into the interior volume of a filter. Accordingly, embolic particles may be aspirated from the interior volume of the filter. The aspiration port may have an oblique shape for increasing aspiration efficiency. The aspiration catheter may also have a therapy device mounted thereon, such as, for example, an inflatable balloon.
Owner:MEDTRONIC VASCULAR INC

Apparatus and methods for reducing embolization during treatment of carotid artery disease

Methods and apparatus are provided for removing emboli during an angioplasty, stenting or surgical procedure comprising a catheter having an occlusion element, an aspiration lumen, and a blood outlet port in communication with the lumen, a guide wire having a balloon, a venous return sheath with a blood inlet port, and tubing that couples the blood outlet port to the blood inlet port. Apparatus is also provided for occluding the external carotid artery to prevent reversal of flow into the internal carotid artery. The pressure differential between the artery and the vein provides reverse flow through the artery, thereby flushing emboli. A blood filter may optionally be included in-line with the tubing to filter emboli from blood reperfused into the patient.
Owner:WL GORE & ASSOC INC

Apparatus and methods for treating stroke and controlling cerebral flow characteristics

InactiveUS6902540B2Quickly and efficiently treat cerebral occlusionEfficient removalStentsBalloon catheterCarotid imtEmbolus
Apparatus and methods for treatment of stroke are provided. In a preferred embodiment, the present invention disposes at least one catheter having a distal occlusive member in either the common carotid artery (CCA) or both the vertebral artery (VA) and the CCA on the hemisphere of the cerebral occlusion. Blood flow in the opposing carotid and / or vertebral arteries may be inhibited. Retrograde or antegrade flow may be provided through either catheter independently to effectively control cerebral flow characteristics. Under such controlled flow conditions, a thrombectomy device may be used to treat the occlusion, and any emboli generated are directed into the catheter(s).
Owner:WL GORE & ASSOC INC
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