US 5,855,546 A · Perfusion balloon and radioactive wire delivery system

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.

Claims12

Dependent claims

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.

5 more elements

Dependencies are inferred from the claim text.

Perfusion balloon and radioactive wire delivery system

Life of this patent

Perfusion balloon and radioactive wire delivery system

Life of this patent

Abstract

Claims12