Perfusion balloon and radioactive wire delivery system
First Claim
1. An intravascular radioactive radiation delivery catheter, comprising:
- an elongate shaft having a proximal portion, a distal portion and an inner tube having an inner lumen for the passage of a radioactive source therethrough;
a helical centering balloon connected to the distal portion of the shaft; and
a perfusion tube disposed on the distal end of the elongate shaft and through the helical balloon, the perfusion tube having a proximal perfusion port, a perfusion lumen and a distal perfusion port for the passage of blood therethrough.
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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
18 Claims
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1. An intravascular radioactive radiation delivery catheter, comprising:
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an elongate shaft having a proximal portion, a distal portion and an inner tube having an inner lumen for the passage of a radioactive source therethrough;
a helical centering balloon connected to the distal portion of the shaft; and
a perfusion tube disposed on the distal end of the elongate shaft and through the helical balloon, the perfusion tube having a proximal perfusion port, a perfusion lumen and a distal perfusion port for the passage of blood therethrough. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An intravascular radioactive radiation delivery catheter, comprising:
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an elongate shaft having a proximal portion, a distal portion, and an inner tube having an inner lumen;
a helical centering balloon connected to the distal portion of the shaft, the helical balloon having an interior for the passage of blood therethrough, the helical balloon also having an exterior; and
a sheath disposed on the exterior of the helical centering balloon. - View Dependent Claims (15, 16, 17, 18)
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Specification