Drug delivery and dilatation catheter
First Claim
1. A drug delivery and balloon dilatation catheter, comprising:
- an elongate catheter body, having proximal and distal ends;
an inflation balloon on the distal end of the catheter body, the inflated profile of said inflation balloon having proximal and distal conical sections and a central cylindrical section,a delivery balloon on the catheter, disposed about the inflation balloon;
a first lumen extending through the catheter for communication with the inflation balloon;
a second lumen extending through the catheter for communication with the delivery balloon;
a proximal annular seal between the inflation balloon and the delivery balloon; and
a distal annular seal between the inflation balloon and the delivery balloon;
wherein said proximal and distal annular seals extend axially into the conical sections of the inflation balloon so that deflation of the inflation balloon will cause a reduction in the exterior profile of the delivery balloon.
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Accused Products
Abstract
An improved drug delivery catheter, for use in the prevention of restenosis of a dilated vascular region, and/or for use in the delivery of a medication to a preselected vascular site. The catheter comprises an elongate body, an inflation balloon disposed about a catheter body. In a drug delivery embodiment, a perforated drug delivery balloon is disposed concentrically about the inflation balloon. In another embodiment, the two balloons are heat sealed together at the distal and proximal ends of the catheter body. A first lumen extends through the catheter body for communicating with the inflation balloon, and a second lumen extends through the body for communicating with the drug delivery balloon. Methods describing the intraluminal delivery of drugs to a site specific location are also disclosed, including the delivery of a drug to a vascular area before, during or after a conventional PTCA procedure.
317 Citations
23 Claims
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1. A drug delivery and balloon dilatation catheter, comprising:
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an elongate catheter body, having proximal and distal ends; an inflation balloon on the distal end of the catheter body, the inflated profile of said inflation balloon having proximal and distal conical sections and a central cylindrical section, a delivery balloon on the catheter, disposed about the inflation balloon; a first lumen extending through the catheter for communication with the inflation balloon; a second lumen extending through the catheter for communication with the delivery balloon; a proximal annular seal between the inflation balloon and the delivery balloon; and a distal annular seal between the inflation balloon and the delivery balloon; wherein said proximal and distal annular seals extend axially into the conical sections of the inflation balloon so that deflation of the inflation balloon will cause a reduction in the exterior profile of the delivery balloon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A delivery and balloon dilatation catheter for delivering a quantity of a fluid to a preselected site in a body lumen, comprising:
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an elongate catheter body having proximal and distal ends; a cross linked polyethylene inflation balloon on the distal end of the catheter body the inflated profile of said inflation balloon having proximal and distal control sections and a central cylindrical section; a delivery balloon on the catheter, disposed coaxially about the inflation balloon; a first lumen extending through the catheter for communication with the inflation balloon; a second lumen extending through the catheter for communication with the delivery balloon; a first annular seal between the distal end of the inflation balloon and the delivery balloon, said first annular seal extending axially into the cylindrical section of the inflation balloon; a second annular seal between the proximal end of the inflation balloon and the delivery balloon, said second annular seal extending axially into the cylindrical section of the inflation balloon; and a delivery passageway extending through said second annular seal to provide communication between the second lumen and the delivery balloon; wherein deflation of the inflation balloon will cause a reduction in the exterior profile of the delivery balloon. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification