Dilation-drug delivery catheter

• US 5,772,632 A
• Filed: 08/04/1997
• Issued: 06/30/1998
• Est. Priority Date: 04/13/1994
• Status: Expired due to Term

• Current Assignee: Schneider Electric SE
• Original Assignee: Schneider Electric SE
• Inventors: Forman, Michael R.
• Primary Examiner(s): MCDERMOTT, CORRINE MARIE
• Application Number:
  US08/905,873
• Time in Patent Office: 330 Days
• Field of Search: 604/96, 604/101, 604/102, 604/264, 604/265, 604/280, 606/192, 606/194
• US Class Current: 604/103.01
• CPC Class Codes: A61M 2025/0175 having telescopic features, interengaging nestable members movable in relations to one another
• CPC Class Codes: A61M 2025/1015 having two or more independently movable balloons where the distance between the balloons can be adjusted, e.g. two balloon catheters concentric to each other forming an adjustable multiple balloon catheter system
• CPC Class Codes: A61M 2025/1052 for temporarily occluding a vessel for isolating a sector
• CPC Class Codes: A61M 2025/1079 having radio-opaque markers in the region of the balloon
• CPC Class Codes: A61M 25/1006 Balloons formed between concentric tubes
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

A dilation-drug delivery catheter comprises a dilation portion for dilating a stenosis and a drug delivery portion for delivering antithrombolytic, antiproliferative, or any other type of medication, to the dilation site. The drug delivery portion of the catheter is located within the dilation portion, which can be retracted to reveal the drug delivery portion, after dilation. Occlusion balloons are preferably provided on the drug delivery portion to isolate the dilation site during drug delivery.

Claims

1. A dilatation-drug delivery catheter comprising:

(a) an outer catheter having a distal portion, the outer catheter comprising;

(i) a dilatation balloon disposed at least partially about the outer catheter distal portion;

(ii) an inflation lumen in communication with the dilatation balloon; and

(iii) a central lumen sized and configured to receive an inner catheter; and

(b) an inner catheter movably disposed at least partially within the outer catheter and having a distal portion, the inner catheter comprising;

(i) at least one drug delivery port configured in the inner catheter distal portion;

(ii) a drug delivery lumen in communication with the at least one drug delivery port; and

(iii) a guidewire lumen sized and configured to receive a guidewire

wherein the dilatation-drug delivery catheter further includes perfusion means comprising at least one passage through the inner catheter to the guidewire lumen.

2. The catheter of claim 1 wherein the outer catheter is adapted for proximal movement relative the inner catheter to expose the at least one drug delivery port.

3. The catheter of claim 1 comprising a plurality of drug delivery ports.

4. The catheter of claim 1 further comprising a lubricious layer between the inner and outer catheters.