EP0399712A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Intravascular drug delivery dilation catheter
Assignee: Schneider USA Inc
•
Filing: 1990-05-14
•
Granted: —
•
Expires: 2010-05-14
Abstract
Abstract An intravascular catheter (10) designed to apply a liquid medicament or other substance to a stenotic lesion as the blood vessel is undergoing dilatation to facilitate the restoration and long-term maintenance of patency to the blood vessel. It comprises three concentrically arranged flexible plastic tubes (12, 14, 16) and a pair of concentrically arranged expander members (22, 30) located at the distal end of the tubes. The space between the outer wall of the inner tube (16) and the inner wall of the intermediate tube (14) is in fluid communication with the interior of the first expander member (22) while the space between the outer wall of the intermediate tube (14) and the inner wall of the outer tube (12) is in fluid communication with the interior of the second expander member (30). A plurality of minute holes (28) are formed through the second expander member (30) such that when the liquid medicament is introduced into the lumen (32) of the outer tube (12) while an inflation fluid is introduced into the lumen (34) of the intermediate tube (14), both expander members (22, 30) inflate with the drug or other substance being ejected out through the tiny pores (28) of the outermost expander member (22) while continued inflation of the inner expander member (30) provides the necessary pressure for dilatation of the lesion.
Inventors
- 👤 Rick L. Shockey
- 👤 Robert A. Van Tassel
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-22 23:25
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61F; A61F2/00; A61F2/82; A61M16/00; A61M16/04; A61M16/0434; A61M16/0454; A61M16/0456; A61M16/0475; A61M16/0477; A61M16/0481; A61M25/1011; A61M25/104; A61B; A61B17/00; A61B17/22; A61B2017/22082; A61M2025/1013; A61M2025/1043; A61M2025/105
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
269 words
An intravascular material delivery dilatation catheter (10) comprising: (a) first, second and third elongated, flexible, plastic tubular member (12, 14, 16) concentrically disposed relative to one another and each having a proximal end, a distal end and a lumen extending between said proximal end and said distal end; (b) first hollow expansible sleeve means (22) bonded at one end (20) to said distal end of said second tubular member (14) and at the other end (24) to said distal end (26) of said third tubular member (16), the interior of said first hollow expansible sleeve means (22) being in fluid communication with said lumen (34) of said second tubular member (14); (c) second hollow expansible sleeve means (30) bonded at one end to said distal end of said first tubular member (12) and at the other end to said distal end of said third tubular member (16), the interior of said second hollow sleeve means (30) being in fluid communication with said lumen (32) of said first tubular member (12), said second hollow sleeve means (30) including a pattern of minute holes (28) extending radially through said second sleeve means (30); and (d) manifold means (38) connected to said proximal ends of said first, second and third tubular members (12, 14, 16) for introducing an inflation fluid into said lumen (34) of said second tubular member (14) and a liquid dispersant into said lumen (32) of said first tubular member (12) whereby said dispersant perfuses through said minute holes (28) in said second sleeve means (30) as said first hollow sleeve means (22) is inflated by said inflation fluid.
Claim 2
Dependent Claim
269 words
An intravascular material delivery dilatation catheter (10) comprising: (a) first, second and third elongated, flexible, plastic tubular member (12, 14, 16) concentrically disposed relative to one another and each having a proximal end, a distal end and a lumen extending between said proximal end and said distal end; (b) first hollow expansible sleeve means (22) bonded at one end (20) to said distal end of said second tubular member (14) and at the other end (24) to said distal end (26) of said third tubular member (16), the interior of said first hollow expansible sleeve means (22) being in fluid communication with said lumen (34) of said second tubular member (14); (c) second hollow expansible sleeve means (30) bonded at one end to said distal end of said first tubular member (12) and at the other end to said distal end of said third tubular member (16), the interior of said second hollow sleeve means (30) being in fluid communication with said lumen (32) of said first tubular member (12), said second hollow sleeve means (30) including a pattern of minute holes (28) extending radially through said second sleeve means (30); and (d) manifold means (38) connected to said proximal ends of said first, second and third tubular members (12, 14, 16) for introducing an inflation fluid into said lumen (34) of said second tubular member (14) and a liquid dispersant into said lumen (32) of said first tubular member (12) whereby said dispersant perfuses through said minute holes (28) in said second sleeve means (30) as said first hollow sleeve means (22) is inflated by said inflation fluid.
Claim 3
Dependent Claim
27 words
The drug delivery dilation catheter (10) as in Claim 1 and further including a guidewire (18) insertable through said lumen (36) of said third tubular member (16).
Claim 4
Dependent Claim
27 words
The material delivery dilation catheter (10) as in Claim 1 wherein said first and second sleeve means (22, 30) are made of a biaxially oriented thermoplastic film.
Claim 5
Dependent Claim
18 words
The material delivery dilation catheter (10) as in Claim 3 wherein said film comprises a polyethylene terephthalate (PET).
Claim 6
Independent Claim
71 words
A method for treating an atherosclerotic lesion on the interior wall of a blood vessel comprising the steps of: (a) routing a dilation catheter (10) having an inflatable expander member (22) through the patient's vascular system until said expander member is juxtaposed relative to said lesion; (b) inflating said expander member to apply pressure against said lesion; and (c) simultaneously perfusing a dispersant through said expander member and onto said lesion.
Claim 7
Independent Claim
71 words
A method for treating an atherosclerotic lesion on the interior wall of a blood vessel comprising the steps of: (a) routing a dilation catheter (10) having an inflatable expander member (22) through the patient's vascular system until said expander member is juxtaposed relative to said lesion; (b) inflating said expander member to apply pressure against said lesion; and (c) simultaneously perfusing a dispersant through said expander member and onto said lesion.
Claim 8
Dependent Claim
14 words
The method as in Claim 5 wherein said dispersant is a drug containing liquid.
Claim 9
Dependent Claim
14 words
The method as in Claim 6 wherein said dispersant is a solidifiable liquid plastic.
Claim 10
Dependent Claim
266 words
The method as in Claim 5 wherein said dilation catheter comprises: (a) first, second and third elongated, flexible, plastic tubular members (12, 14, 16) concentrically disposed relative to one another and each having a proximal end, a distal end and a lumen extending between said proximal end and said distal end; (b) first hollow expander sleeve (22) bonded at one end (20) to said distal end of said second tubular member (14) and at the other end (24) to said distal end of said third tubular member (16), the interior of said first hollow expander sleeve (22) being in fluid communication with said lumen (34) of said second tubular member (14); (c) second hollow expander sleeve (30) bonded at one end to said distal end of said first tubular member (12) and at the other end to said distal end of said third tubular member (16), the interior of said second hollow expander sleeve (30) being in fluid communication with said lumen (32) of said first tubular member (12), said second hollow expander sleeve (30) including a pattern of minute holes (28) extending radially through said second sleeve (30); and (d) manifold means (38) connected to said proximal ends of said first, second and third tubular members (12, 14, 16) for introducing an inflation fluid into said lumen (34) of said second tubular member (14) and a liquid medicament into said lumen (32) of said first tubular member (12) whereby said medicament perfuses through said minute holes (28) in said second expander sleeve (30) as said first hollow sleeve (22) in inflated by said inflation fluid.
References Cited (Backward Citations)
US4423725A
Cited
US4714460A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.