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980 results about "Embolism" patented technology

Blockage in the arterial or venous blood flow.

Methods and apparatus for blocking flow through blood vessels

This invention is methods and apparatus for occluding blood flow within a blood vessel (22). In a first series of embodiments, the present invention comprises a plurality of embolic devices (16) deployable through the lumen (12) of a conventional catheter (10) such that when deployed, said embolic devices (16) remain resident and occlude blood flow at a specific site within the lumen of the blood vessel (22). Such embolic devices (16) comprise either mechanical embolic devices that become embedded within or compress against the lumen of the vessel or chemical vaso occlusive agents that seal off blood flow at a given site. A second embodiment of the present invention comprises utilization of a vacuum / cauterizing device capable of sucking in the lumen of the vessel about the device to maintain the vessel in a closed condition where there is then applied a sufficient amount of energy to cause the tissue collapsed about the device to denature into a closure. In a third series of embodiments, the present invention comprises the combination of an embolization facilitator coupled with the application of an energy force to form an intraluminal closure at a specified site within a vessel.
Owner:MEDTRONIC VASCULAR INC

Method and assembly for distal embolic protection

Methods and assemblies are described for capturing embolic material in a blood vessel or other body cavity during cardiovascular or valve replacement and repair surgery, wherein access is provided through the apical area of the patient's heart. The distal embolic protection assembly generally comprises a sleeve having a lumen, an actuating member having proximal and distal ends, wherein the actuating member is movably disposed within the lumen, and a filter assembly coupled to the distal end of the actuating member. The filter assembly generally comprises a porous bag having an open proximal end, a collapsible and expandable frame that is coupled to the open proximal end of the porous bag, and at least one support spine disposed at least a part of the longitudinal axis of the porous bag. The porous bag is configured such that it permits blood to perfuse freely through while capturing embolic material and other debris.
Owner:MEDTRONIC 3F THERAPEUTICS

Embolic coil deployment system with improved embolic coil

A medical device for placing an embolic coil at a preselected location within a vessel comprising a positioning catheter having a distal tip for retaining the embolic coil which when pressurized with a fluid expands outwardly to release the coil at the preselected position and in which a plurality of turns at the proximal portion of the embolic coil are spot welded to adjacent turns to prevent this proximal portion of the coil from elongating or stretching while also providing a coil which is very flexible.
Owner:CODMAN & SHURTLEFF INC

Fiber based embolism protection device

Improved embolism protection devices comprises fibers that can have one configuration for delivery of the device and a second configuration in which the device is deployed for filtering of flow within a vessel. In some embodiments, the fibers can be connected to a fiber support, which is connected to an actuating element. The actuating element controls the transition from the delivery configuration to the deployed configuration. The embolism protection device can comprise a guidewire. The fibers can be attached at one end to a fiber support structure and at another end to the guidewire. A hypotube can be attached to the proximal end of the fibers while the guidewire is attached at the distal end of the fibers with the guidewire extending within a central channel of the hypotube. The hypotube can be used to guide the delivery of treatment structures, such as a balloon and / or a stent.
Owner:MEDTRONIC INC

Endovascular thin film devices and methods for treating and preventing stroke

InactiveUS20030060782A1Safely and permanently excludingPreventing initial or recurrent aneurysmal subarachnoid hemorrhageStentsCatheterIn situ polymerizationProsthesis
Devices for excluding aneurysms and treating atherosclerotic disease, for intra-aneurysmal occlusion; and devices for preventing distal emboli. The devices are generally pliable and collapsible thin film devices which can be delivered via a microcatheter into the desired location where they are deployed and undergo either a shape memory phase transformation or in situ polymerization to assume the stable configuration of a permanent endoluminal prosthesis. Prior to being caused to assume their final shape, the devices remain soft, collapsible and pliable to ensure atraumatic delivery through the vascular system. Upon reaching the endoluminal defect in the vessel, the device is extruded from the microcatheter. Devices are also provided for retrieving clots.
Owner:NEW YORK UNIV

Endovascular thin film devices and methods for treating and preventing stroke

InactiveUS6666882B1Treating and preventing ischemic and hemorrhagic strokeInhibit migrationStentsOcculdersIn situ polymerizationDistal embolization
Devices for excluding aneurysms and treating atherosclerotic disease, for intra-aneurysmal occlusion, and devices for preventing distal emboli. The devices are generally pliable and collapsible thin film devices which can be delivered via a microcatheter into the desired location where they are deployed and undergo either a shape memory phase transformation or in situ polymerization to assume the stable configuration of a permanent endoluminal prosthesis. Prior to being caused to assume their final shape, the devices remain soft, collapsible and pliable to ensure atraumatic delivery through the vascular system. Upon reaching the endoluminal defect in the vessel, the device is extruded from the microcatheter. Devices are also provided for retrieving clots.
Owner:NEW YORK UNIV

Neuro-thrombectomy catheter and method of use

InactiveUS20020133111A1Avoid cloggingEnergy intensiveElectrotherapyCatheterThrombusCavitation
A microcatheter for removing thromboemboli from cerebral arteries in patients suffering from ischemic stroke. The microcatheter provides an extraction lumen that can be scaled to a very small diameter that is still capable of extracting and emulsifying thrombus without clogging the channel. The microcatheter of the invention uses a series of spaced apart energy application mechanisms along the entire length of the catheter's extraction lumen to develop sequential pressure differentials to cause fluid flows by means of cavitation, and to contemporaneously ablate embolic materials drawn through the extraction lumen by cavitation to thereby preventing clogging of the lumen. The catheter system thus provides a functional high-pressure extraction lumen that is far smaller than prior art catheter systems. Preferred mechanisms for energy delivery are (i) a laser source and controller coupled to optic fibers in the catheter wall or (ii) an Rf source coupled to paired electrodes within the extraction lumen. Each energy emitter can apply energy to fluid media in the extraction channel of the catheter-wherein the intense energy pulses can be sequentially timed to cause fluid media flows in the proximal direction in the channel.
Owner:SHADDUCK JOHN H

Embolic coil hydraulic deployment system

A medical device for placing an embolic coil at a preselected location within a vessel comprising a positioning catheter having a distal tip for retaining the embolic coil which when pressurized with a fluid expands outwardly to release the coil at the preselected position.
Owner:CODMAN & SHURTLEFF INC

Intravascular guidewire filter system for pulmonary embolism protection and embolism removal or maceration

An intravascular emboli capture and retrieval system for intravascular embolism protection and embolism removal or maceration. Guidewire mounted proximally and distally located multiple opening filters are deployed within the vasculature and used to part, divide and macerate embolic debris and to capture such embolic debris within the confines thereof. A deployable flexible preformed memory shaped capture sleeve is alternatively used to collapse one or more filters and embolic debris therein for subsequent proximal withdrawal from the vasculature.
Owner:SURMODICS MD LLC

Detachable embolic coil assembly using interlocking clasps and method of use

This invention is a surgical instrument and specifically is a device for delivering an embolic coil to a selected site within the vasculature of a human body via use of a catheter. In particular, the device uses embolic coils having interlocking clasps on the coils which are secured to each other by a control wire within the catheter. Retraction of the control wire into the catheter body uncouples the distal coil.
Owner:TARGET THERAPUETICS INC

Methods of reducing embolism to cerebral circulation as a consequence of an index cardiac procedure

There is disclosed a porous emboli deflector for preventing cerebral emboli while maintaining cerebral blood flow during an endovascular or open surgical procedure. The device prevents the entrance of emboli of a size able to cause stroke (such as greater than 100 microns) from entering either the right or left common carotid arteries, and / or the right or left vertebral arteries by deflecting emboli downstream of these vessels. The device can be placed prior to any manipulation of the heart or aorta allowing maximal protection of the brain during the index procedure. The deflector has a low profile within the aorta which allows sheaths, catheters, or wires used in the index procedure to pass. Also disclosed are methods for insertion and removal of the deflector.
Owner:EDWARDS LIFESCIENCES AG

Embolism protection devices

Embolism protection devices can be formed with a biocompatible expandable polymer that can expand upon release within a patient's vessel. Upon release, the structure can be configured to filter flow through the vessel. The material of the embolism protection devices can release one or more biologically active agents, such as a thrombolitic agent, including, for example, tPA. Alternatively or additionally, the embolism protection device can be connected to a tether that elutes one or more biologically active agents.
Owner:MEDTRONIC INC

Steerable guidewire system

A catheter system utilizing one or more sensors is described. The catheter can be used as part of an embolic coil system, guidewire system, or combined embolic coil / guidewire system where the devices interact with the catheter system. A variable detachment embolic coil system and guidewire system are also described.
Owner:MICROVENTION INC

Vascular remodeling device

Described herein are vascular remodeling devices that include a proximal section, an intermediate section, and a distal section. During deployment, the proximal section can expand from a compressed delivery state to an expanded state and anchors the device in an afferent vessel of a bifurcation. The distal section expands from the compressed delivery state to an expanded state that may be substantially planar, approximately semi-spherical, umbrella shaped, or reverse umbrella shaped. The distal section is positioned in a bifurcation junction across the neck of an aneurysm or within an aneurysm. The intermediate section allows perfusion to efferent vessels. Before or after the device is in position, embolic material may be used to treat the aneurysm. The distal section can act as a scaffolding to prevent herniation of the embolic material. The device can be used for clot retrieval with integral distal embolic protection.
Owner:TYCO HEALTHCARE GRP LP

Emboli filter export system

ActiveUS20050277976A1Reducing platelet aggregationMeaningful long-term clinical benefitSurgeryDilatorsDistal portionEmbolic Protection Devices
Methods for the removal of an embolism protection device use aspiration during the drawing of the embolism protection device into the catheter. Generally, the embolism protection device comprises a three dimensional filtering matrix that provides improved filtering without blocking the flow through the patient's vessel. In some embodiments, the embolism protection device can be actuated between a deployed configuration and a removal configuration with a reduced area across the cross section of the vessel lumen. The embolism protection device in the removal configuration can be drawn within the aspiration catheter. The aspiration catheter can have a distal portion with an expanded compartment with an average diameter at least about 20 percent larger than the average diameter of the shaft of the catheter within about 10 centimeters of the expanded compartment. In a rapid exchange version, the rapid exchange segment can have a length of at least about 10 centimeters.
Owner:MEDTRONIC INC

Embolic protection device

An embolic protection device for use in a patient's blood vessel, such as the aorta, has an approximately cylindrical outer structure made of a filter mesh material and an approximately conical inner structure also made of a filter mesh material. On the downstream end of the embolic protection device, the wider end of the conical inner structure is joined to the cylindrical outer structure. The upstream end of the embolic protection device is open for blood to flow between the conical inner structure and the cylindrical outer structure. The space between the conical inner structure and the cylindrical outer structure defines a collection chamber for captured emboli. The narrow upstream end of the conical inner structure has a catheter port with a resilient seal that is sized for passage of a catheter shaft. The filter mesh material may be self-supporting or it may be supported on a resilient-framework or an inflatable framework.
Owner:EMBOLINE

Embolic coil deployment system with improved embolic coil

A medical device for placing an embolic coil at a preselected location within a vessel comprising a positioning catheter having a distal tip for retaining the embolic coil which when pressurized with a fluid expands outwardly to release the coil at the preselected position and including an embolic coil having a relatively flexible proximal portion which resists stretching.
Owner:CODMAN & SHURTLEFF INC

Tracking aspiration catheter

In general, aspiration catheters have a suction device, a proximal portion and a shaft with a proximal end and a distal end. Improvements in the aspiration catheter design provide for improved tracking and / or reduced chance of snagging during delivery of the aspiration catheter. In some embodiments, the tip of the shaft has a curve relative to the neutral orientation of the remaining portions of the shaft. In other embodiments, the aspiration catheter further comprises a tracking portion that has a guide lumen. A guide structure can extend through the guide lumen to limit the motion of the tip of the catheter relative to the guide structure during delivery of the aspiration catheter within a patient's vessel. In further embodiments, the aspiration catheter comprises a deflection structure having a tether and a bumper. Improved methods for using the aspiration catheter to recover an embolism protection device are described.
Owner:MEDTRONIC INC

Mechanical clot treatment device

InactiveUS7875050B2Preserving abilityPreserving cage assembly shapeInfusion syringesSurgeryEngineeringActuator
An embolism treatment device includes an elongated core wire having a coil tip coupled to the distal end of the core wire and a cage assembly substantially coaxial to the core wire, having a first deployment shape and a second expanded shape. The core wire is freely moveable axially through the cage assembly. The device additionally includes an inner coil surrounding the core wire within the cage assembly and an actuator element, having a first position and a second position, located proximally to the cage assembly, wherein when the actuator element is in the first position, the cage assembly is in the first deployment shape and when the actuator element is in the second position, the cage assembly is in the second expanded shape.
Owner:STRYKER CORP +1

Intravascular flow modifier and reinforcement device

An intravascular flow modifier and vascular reinforcement for treatment of aneurysms is formed of one or more loops of wire of resilient material formed into a series of transverse loops and longitudinal connecting sections to configure an essentially cylindrical reinforcement device that still allows, if desired, access to the neck of an aneurysm for insertion of embolic coils and the like. The proximal and distal regions of the sinusoidal loops may be more tightly coiled than the intermediate regions of the loops, or may have a larger diameter than the intermediate regions. The intravascular flow modifier and vascular reinforcement device can be provided with an outer covering that can be formed as a fiber, and can be woven, or can be formed as a ribbon wound about the intravascular flow modifier and vascular reinforcement device. The wire of resilient material can also be coated with a hydrophilic material. One or more round or oval intermediate loops extending radially outward may also be provided. An apparatus for removing clots may also be formed from one or more loops of wire of resilient material in a hollow conical shape non-detachably joined to a deployment device, to trap and hold clots within a vessel.
Owner:MICRUS CORP

Methods of protecting a patient from embolization during surgery

An apparatus suitable for filtering emboli in an open surgical procedure. The apparatus comprises an elongated member having a distal region and a support hoop attached to the distal region. A blood permeable sac is affixed to the support hoop so that the support hoop forms a distally-facing mouth of the blood permeable sac. A guidewire is slideably attached to the elongated member. A delivery sheath is provided having a cavity for accepting the elongated member, support hoop and blood permeable sac, and a lumen extending through the cavity to permit the guidewire to pass therethrough. Methods of use are also described.
Owner:TSUGITA ROSS S +2

Methods and apparatus for treating embolism

A method and apparatus for treating a clot in the blood vessel of a patient, and particularly the treatment of a pulmonary embolism is disclosed. The treatment includes restoring flow through the clot followed by clot removal, either partially or substantially completely. The clot treatment device is expandable into the blood vessel and may contain radial extensions that assist in restoring flow as well as in removing clot material.
Owner:INARI MEDICAL INC
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