EP0517075A1
Expired / Lapsed
EP
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Intravascular catheter with a nontraumatic distal tip
Assignee: Abbott Cardiovascular Systems Inc
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Filing: 1992-05-26
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Granted: —
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Expires: 2012-05-26
Abstract
Abstract An intravascular catheter such as a guiding catheter of composite construction having a nontraumatic distal tip comprising a proximal elastomeric tubular element (12) and a distal elastomeric tubular element (13) formed of softer material that the proximal section. The proximal tubular section (17) of the distal tip preferably has a radiopaque material incorporated therein to enable the distal tip to be fluoroscopically observable when in place within a patient.The shaft (11) of the catheter, which exhibits excellent torquability and pushability, is formed with a very thin wall. The catheter shaft includes an inner tubular member (21) of braided polymeric fibrous strands impregnated with a thermoset polyurethane and having an outer jacket (22) or coating of thermoplastic polyurethane secured to the braided tubular member. In some embodiments it is preferred to include a lubricous liner (28) within the braided tubular member.
Inventors
- 👤 Patrick E. Macaulay
- 👤 Lawrence D. Wasicek
- 👤 Alfredo Bayot
- 👤 Kurt Klemm
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 09:54
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/008; A61M2025/0081; A61M2205/00; A61M2205/32; A61M25/0043; A61M25/005; A61M25/0053; A61M25/0054; A61M25/0069
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
53 words
An intravascular catheter characterized by: a) a tubular shaft having proximal and distal ends with an inner lumen extending therein; and b) at least two relatively short, coaxially disposed flexible tubular elements secured to the distal end of the catheter shaft, the most distal tubular element being softer than the proximal tubular element.
Claim 2
Dependent Claim
22 words
The intravascular catheter of claim 1 further characterized in that the flexible tubular elements are formed of elastomeric or other rubber-like materials.
Claim 3
Dependent Claim
74 words
The intravascular catheter of any one of the preceding claims further comprised inn that the shaft comprises: a braided tubular member formed of a plurality of multifilament strands which are impregnated with a thermoset polymeric resin; a lubricous polymeric lining extending longitudinally through the braided tubular member and defining the inner lumen extending within the elongated shaft of the guiding catheter; and a thermoplastic polymeric jacket on the exterior of the braided tubular member.
Claim 4
Dependent Claim
52 words
The intravascular catheter of claim 3 further characterized in that the thermoset polymer resin which is incorporated into a distal portion of the braided tubular member has a cured hardness less than the cured hardness of the thermoset polymer resin which is incorporated into the proximal portion of the braided tubular member.
Claim 5
Dependent Claim
139 words
A torquable guiding catheter having an elongated tubular shaft with an inner lumen extending therein and having a preformed distal portion with a soft distal tip which facilitates a nontraumatic advancement through a patient's vasculature, characterized by: a) an elongated tubular shaft having proximal and distal ends, an inner lumen extending therein and a preformed distal portion, the shaft comprising, a braided tubular member formed of a plurality of multifilament strands which are impregnated with a thermoset polymeric resin, and a thermoplastic polymeric jacket on the exterior of the braided tubular member; and b) a nontraumatic tip secured to the distal end of the elongated shaft comprising at least two relatively short elastomeric tubular elements in a coaxial configuration with each other and the elongated shaft and the most distal tubular element being softer than the proximal tubular element.
Claim 6
Dependent Claim
27 words
The guiding catheter of claim 5 further characterized in that the braided tubular member is formed of radially compressed multifilament polymeric strands impregnated with thermoset polymeric resin.
Claim 7
Dependent Claim
28 words
The guiding catheter of claim 3 or 5 further characterized in that the thermoset polymeric resin which is incorporated into the braided multifilament polymeric strands is a polyurethane.
Claim 8
Dependent Claim
19 words
The guiding catheter of claim 3 or 5 further characterized in that the thermoplastic polymeric jacket is a polyurethane.
Claim 9
Dependent Claim
29 words
The guiding catheter of claim 3 or 5 further characterized in that the multifilament strands are formed of a material selected from the group consisting of aramid and polyester.
Claim 10
Dependent Claim
47 words
The guiding catheter of claim 5 further characterized in that the braided tubular member has a distal end which has incorporated therein a thermoset polymer resin having a cured hardness less than the cured hardness of the thermoset polymer incorporated into the braided tubular member proximal thereto.
Claim 11
Dependent Claim
22 words
The guiding catheter of claim 3 or 5 wherein the multifilament polymeric strands are braided into a double strand, diamond shaped construction.
Claim 12
Dependent Claim
34 words
The guiding catheter of claim 5 further characterized by a lubricous polymeric lining extending longitudinally through the braided tubular member and defining the inner lumen extending within the elongated shaft of the guiding catheter.
Claim 13
Dependent Claim
38 words
The intravascular catheter of claim 1 or 5 further characterized in that the most distal tubular element has a durometer hardness of at least about Shore 10 A lower than the durometer hardness of the proximal tubular element.
Claim 14
Dependent Claim
32 words
The intravascular catheter of any one of the preceding claims further characterized in that the distal tubular element has a durometer hardness of about Shore 70 A to about Shore 90 A.
Claim 15
Dependent Claim
32 words
The intravascular catheter of any one of the preceding claims further characterized in that the proximal tubular element has a durometer hardness of about Shore 80 A to about Shore 100 A.
References Cited (Backward Citations)
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