Perfusion balloon and radioactive wire delivery system
First Claim
1. An intravascular radiation delivery catheter comprising:
- an elongated shaft member including a proximal region and a distal region;
a balloon assembly disposed on said shaft distal region;
said shaft including a radiation wire lumen including a proximal end and a distal end, said radiation wire lumen extending between said shaft proximal end and said balloon assembly;
said shaft distal region including a guide wire lumen;
said shaft including an inflation lumen including a proximal end and a distal end, said inflation lumen extending between said shaft proximal end and said balloon assembly;
said balloon assembly including an inflatable helical balloon having at least one strand, said helical strand being in fluid communication with said inflation lumen,said elongate shaft member distal region having a plurality of through-holes,said helical strand passing through said shaft member through-holes such that said helical balloon is secured to said shaft member and defines a perfusion lumen between said helical strand and said shaft member distal region.
2 Assignments
0 Petitions
Accused Products
Abstract
A catheter capable of irradiating blood vessel walls to inhibit restenosis after angioplasty. Catheters are capable of simultaneous irradiation, angioplasty, and in some devices, drug infusion. Preferred catheters include a helical perfusion balloon having strand windings spaced apart when inflated and defining a perfusion lumen within. A tubular sheath over the helical strands and distal shaft region is used in some embodiments and defines an outer wall for the perfusion lumen. A spiral, inter-strand space is defined between the sheath outer wall and the blood vessel inner wall, providing a confined volume for controlled delivery of drugs to the vessel wall in conjunction with irradiation. A device having a radiation wire, distally closed-end tube is provided. A device having a radiation wire open ended tube terminating proximally of the perfusion lumen is also provided.
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Citations
12 Claims
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1. An intravascular radiation delivery catheter comprising:
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an elongated shaft member including a proximal region and a distal region; a balloon assembly disposed on said shaft distal region; said shaft including a radiation wire lumen including a proximal end and a distal end, said radiation wire lumen extending between said shaft proximal end and said balloon assembly; said shaft distal region including a guide wire lumen; said shaft including an inflation lumen including a proximal end and a distal end, said inflation lumen extending between said shaft proximal end and said balloon assembly; said balloon assembly including an inflatable helical balloon having at least one strand, said helical strand being in fluid communication with said inflation lumen, said elongate shaft member distal region having a plurality of through-holes, said helical strand passing through said shaft member through-holes such that said helical balloon is secured to said shaft member and defines a perfusion lumen between said helical strand and said shaft member distal region. - View Dependent Claims (2, 3, 4, 5)
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6. An intravascular radiation delivery catheter comprising:
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an elongated shaft member including a proximal region, a distal region, and a longitudinal axis; a balloon assembly disposed on said shaft distal region; said shaft including a radiation wire tube including a proximal end and a distal end, said radiation wire tube extending between said shaft proximal end and said balloon assembly; said shaft distal region including a guide wire tube; said shaft including an inflation tube including a proximal end and a distal end, said inflation tube extending between said shaft proximal end and said balloon assembly; said balloon assembly including an inflatable helical balloon having at least one helical strand configured into a plurality of windings about said longitudinal axis, said helical strand being in fluid communication with said inflation lumen, said elongate shaft member distal region having a plurality of through-holes, said helical strand passing through said shaft member through-holes such that said helical balloon is secured to said shaft member and defines a perfusion lumen between said helix strand and said shaft member distal region. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification