Centering catheter with improved perfusion
First Claim
1. A catheter for improved perfusion when positioned within a vessel, said catheter comprising:
- a segment having lobes which form at least one main perfusion channel, said lobes having a plurality of engagement knobs formed for compliantly engaging the walls of a vessel and forming auxiliary perfusion channels.
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Accused Products
Abstract
A centering catheter with engagement knobs to provide improved perfusion in a vessel during intravascular radiation therapy. In one embodiment, a helical centering balloon catheter includes a helical centering balloon formed of helical lobes having a plurality of engagement knobs that outwardly protrude from the helical lobes. The helical lobes form a main spiral perfusion channel for perfusion of blood past the centering catheter. The engagement knobs compliantly engage the vessel walls and offset of the helical lobes such that auxiliary perfusion channels are formed around the engagement knobs between the helical lobes and the walls of the vessel to allow additional perfusion. In the event of a partial obstruction of the spiral channel or a single point failure, the auxiliary perfusion channels allow perfusion past the obstruction.
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Citations
29 Claims
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1. A catheter for improved perfusion when positioned within a vessel, said catheter comprising:
a segment having lobes which form at least one main perfusion channel, said lobes having a plurality of engagement knobs formed for compliantly engaging the walls of a vessel and forming auxiliary perfusion channels. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A catheter for delivery of intravascular radiation therapy within a vessel comprising:
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a flexible, elongate shaft, said shaft having a lumen for receiving a radiation source; and
a segment attached to said shaft, said segment comprising helical lobes which form at least one main spiral perfusion channel, said helical lobes having a plurality of engagement knobs outwardly protruding from said helical lobes for compliantly engaging the walls of said vessel and for forming auxiliary perfusion channels to allow increased perfusion past said catheter. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A catheter for delivery of intravascular radiation therapy within a vessel, comprising:
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a flexible, elongate shaft, said shaft having a proximal end and distal tip, and a central lumen for receiving a radiation source; and
an inflatable, helical balloon attached to said shaft and located proximal to said distal tip, wherein said inflatable, helical balloon comprises helical lobes which form at least one main spiral perfusion channel, said helical lobes having a plurality of engagement knobs for compliantly engaging the walls of said vessel and for forming auxiliary perfusion channels to allow increased perfusion. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. An apparatus, comprising:
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means for compliantly engaging a wall of a vessel; and
means for forming auxiliary perfusion channels. - View Dependent Claims (23, 24, 25)
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26. A catheter, comprising:
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a balloon having a plurality of engagement knobs to engage a vessel wall, wherein each of said plurality of engagement knobs is disposed substantially in an axial direction along said balloon with respect to each other, and wherein said plurality of engagement knobs form a plurality of perfusion channels. - View Dependent Claims (27, 28, 29)
a central lumen for receiving a radiation source, wherein said plurality of engagement knobs center said radiation source, when present, within said vessel wall, and wherein said plurality of engagement knobs are disposed substantially in a direction that is perpendicular to said axial direction.
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28. The catheter of claim 26, wherein said balloon comprises a helically-shaped balloon that forms a spiral perfusion channel.
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29. The catheter of claim 26, wherein each of said plurality of engagement knobs is inflatable, outward, hollow protrusions formed integrally from said balloon, and wherein said axial direction is an axis between a proximal and distal end of said balloon.
Specification