Cerebral balloon angioplasty system
First Claim
1. A blood vessel occlusion catheter for use during therapeutic intervention of a blood vessel for flushing away fluid and debris from the area of the therapeutic intervention comprising,an elongated shaft sized to be introduced into the blood vessel lumen,occlusion means secured to the shaft at or near the distal end of the shaft, the occlusion means capable of forming a funnel with the larger end of the funnel facing distally on the shaft and contacting the vessel walls to form a seal against the vessel walls,an inflation lumen carried by the shaft and communicating with the interior of the occlusion means enabling the occlusion means to be inflated into the shape of said funnel, wherein the occlusion means when inflated defines surfaces capable of channeling all fluid and debris contacting the surfaces continuously in a proximal direction to an efflux means,efflux means enabling fluid and debris to be carried within the shaft toward and out of the proximal end of the shaft, andintervention means located on the shaft distal to the inflatable means for treating a site along the blood vessel.
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Accused Products
Abstract
An occlusion catheter for use during the therapeutic intervention of a cerebral blood vessel for flushing away fluid and debris from the area of the therapeutic intervention is provided. The catheter carries an inflatable occlusion balloon capable of being formed into a funnel with the larger end of the funnel facing distally. The funnel-shaped occlusion balloon seals the walls of the vessel to establish retrograde flow of blood. The peripheral walls of the funnel meet the vessel walls at an oblique angle and channel fluid and debris flowing proximally into the funnel to efflux ports at the base of the funnel.
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Citations
45 Claims
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1. A blood vessel occlusion catheter for use during therapeutic intervention of a blood vessel for flushing away fluid and debris from the area of the therapeutic intervention comprising,
an elongated shaft sized to be introduced into the blood vessel lumen, occlusion means secured to the shaft at or near the distal end of the shaft, the occlusion means capable of forming a funnel with the larger end of the funnel facing distally on the shaft and contacting the vessel walls to form a seal against the vessel walls, an inflation lumen carried by the shaft and communicating with the interior of the occlusion means enabling the occlusion means to be inflated into the shape of said funnel, wherein the occlusion means when inflated defines surfaces capable of channeling all fluid and debris contacting the surfaces continuously in a proximal direction to an efflux means, efflux means enabling fluid and debris to be carried within the shaft toward and out of the proximal end of the shaft, and intervention means located on the shaft distal to the inflatable means for treating a site along the blood vessel.
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2. An occlusion catheter for use during therapeutic intervention of a blood vessel for flushing away fluid and debris from the area of the therapeutic intervention comprising,
an elongated shaft sized to be introduced into the blood vessel lumen, occlusion means secured to the shaft at or near the distal end of the shaft, the occlusion means capable of forming a funnel with the larger end of the funnel facing distally on the shaft and contacting the vessel walls to form a seal against the vessel walls, wherein said inflatable occlusion means comprises an elastic balloon secured to the shaft, an inflation lumen carried by the shaft and communicating with the interior of the occlusion means enabling the occlusion means to be inflated into the shape of said funnel, wherein the occlusion means when inflated defines surfaces capable of channeling all fluid and debris contacting the surfaces continuously and at a proximal direction to an efflux means, efflux means enabling fluid and debris to be carried within the shaft toward and out of the proximal end of the shaft, and means located on the shaft and radially extending therefrom for engaging the balloon for causing the distal end of the balloon to form a funnel, the larger end of said funnel capable of forming a seal against the vessel walls.
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3. A blood vessel occlusion catheter for use during therapeutic intervention of a blood vessel for flushing away fluid and debris from the area of the therapeutic intervention comprising,
an elongated shaft sized to be introduced into the blood vessel lumen, an elastic balloon secured to the shaft at or near its distal end, an inflation lumen carried by the shaft and communicating with the interior of the balloon enabling the balloon to be inflated and for causing it to form a seal against the vessel proximally of the therapeutic intervention, means attached to the shaft and radially extending therefrom for engaging the balloon for causing the distal end of the balloon to form a funnel with the larger end of the funnel facing distally on the shaft when the balloon is inflated, and efflux means at the base of the funnel enabling fluid and debris which enter the funnel to be carried within the shaft toward and out of its proximal end.
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12. An occlusion catheter for use during therapeutic intervention of a blood vessel for flushing away fluid and debris from the area of the therapeutic intervention comprising,
an elongated shaft sized to be introduced into the blood vessel lumen, an elastic balloon secured to the shaft at or near its distal end, an inflation lumen carried by the shaft and communicating with the interior of the balloon enabling the balloon to be inflated and for causing it to form a seal against the vessel proximally of the therapeutic intervention, means engaging the balloon for causing the distal end of the balloon to form a funnel with the larger end of the funnel facing distally on the shaft when the balloon is inflated, said means engaging the balloon including a plurality of struts on the shaft extending in an axial direction with respect to the shaft, additional means connected to the struts for moving the distal end and proximal ends of the struts toward one another and moving the intermediate portions of the struts radially outward to form the funnel in the distal end of the balloon, and efflux means at the base of the funnel enabling fluid and debris which enter the funnel to be carried within the shaft to its proximal end.
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21. An occlusion catheter for use during therapeutic intervention of a blood vessel for flushing away fluid and debris from the area of the therapeutic intervention comprising,
an elongated shaft sized to be introduced into the blood vessel lumen, an elastic balloon secured to the shaft at or near its distal end, an inflation lumen carried by the shaft and communicating with the interior of the balloon enabling the balloon to be inflated and for causing it to form a seal against the vessel proximally of the therapeutic intervention, means engaging the balloon for causing the distal end of the balloon to form a funnel with the larger end of the funnel facing distally on the shaft when the balloon is inflated, comprising a cylindrical element secured to the shaft and within the balloon and splayed at its distal end to form the funnel facing in a distal direction when the balloon is inflated and, efflux means at the base of the funnel enabling fluid and debris which enter the funnel to be carried within the shaft to its proximal end.
- 22. An occlusion catheter as defined in claim wherein splayed end of the cylindrical element comprises a series of struts, said struts collapsing against the surface of the shaft when the balloon is deflated and splaying outwardly from the shaft when the balloon is inflated.
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26. An occlusion catheter for use during therapeutic intervention of a blood vessel for flushing away fluid and debris from the brain comprising,
a multi lumen elongated shaft sized to be introduced into the blood vessel lumen, a forming element disposed over the distal end of the shaft and connected at its proximal end to the shaft, the distal end of the element being slit and splayed in a distal direction, an elastic balloon secured at its proximal end to the shaft proximally of the splayed end of the element, and secured at its distal end to the shaft in a manner to encircle the splayed end of the element, means connecting the interior of the balloon to one of the lumens of the shaft so that the balloon can be inflated and form a seal against the wall of the vessel lumen, said splayed end of the element assuming a funnel shape with its larger end facing distally when the balloon is inflated and causing the balloon to conform to the shape of the funnel, and said element collapsing against the outer surface of the shaft when the balloon is deflated, and means connecting the apex of the funnel with another of the lumens of the shaft so that the retrograde flow from the site of intervention will enter the funnel and be carried toward the proximal end of the shaft.
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27. A catheter system for transluminal angioplasty of the cerebral vessels comprising,
an elongated multilumen shaft means sized to be introduced into the vessel lumen, inflatable means secured to the shaft means near its distal end, the inflatable means capable of forming a funnel with the larger end of the funnel facing distally on the shaft means when inflated, an inflation lumen passing axially through the shaft means and communicating with the interior of the inflatable means enabling the inflatable means to be inflated and causing it to form a funnel, the larger end of which forms an occluding seal against the vessel walls, efflux means at the base of the funnel communicating with an efflux lumen passing axially through the shaft means enabling fluid and debris which enter the funnel to be carried into the shaft toward its proximal end, an intervention lumen extending axially through the shaft means, and intervention means capable of being delivered through the intervention lumen to a site in the vessel distal to the inflatable means for therapeutically treating the site, wherein the inflatable means comprises a balloon and a plurality of struts engaging the balloon, the struts extending in an axial direction with respect to a first shaft of the shaft means, and a second shaft of said shaft means extending axially and movable in the first shaft and connected to the distal ends of the struts for moving the distal and proximal ends of the struts closer to one another and moving the intermediate portions of the struts radially outward toward the wall of the vessel lumen to form the distal end of the balloon into a funnel shape.
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34. A method for therapeutic intervention at a site in a cerebral vessel comprising,
occluding the cerebral vessel at a location proximal and close to the intervention site to establish retrograde flow in said vessel distal of said occlusion, therapeutically treating the intervention site, collecting and withdrawing from the vessel fluid and debris moved to the occlusion by the retrograde flow, and reestablishing antegrade flow of blood through the vessel.
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39. A method for therapeutic intervention at a site in a cerebral vessel comprising,
introducing an occluding means and a treatment means into a cerebral vessel, the occluding means carried on a shaft having efflux means capable of acting with the occluding means to collect and withdraw from the vessel fluid and debris distal of the occluding means, activating the occluding means to seal the vessel at a location proximal of the intervention site and to establish retrograde flow in the vessel distal of the occluding seal, therapeutically treating the intervention site with the treatment means, collecting and withdrawing fluid and debris distal of the occluding seal through the efflux means, the retrograde flow moving debris toward the efflux means, and deactivating the occlusion means to reestablish antegrade flow in the vessel.
Specification