US5290230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intraluminal catheter with a composite shaft
Assignee: Abbott Cardiovascular Systems Inc
•
Filing: 1992-05-11
•
Granted: 1994-03-01
•
Expires: 2012-05-11
Abstract
Abstract A composite tubular element for intravascular catheters, such as fixed-wire dilatation catheters and guiding and angiographic catheters, which is formed by braiding strands formed from an intimate mixture of polymeric matrix materials, such as fibers and powders, having a relatively low melting point and high strength reinforcing fibers having a relatively high melting point into a tubular element, heating the braided tubular element to melt the low melting point matrix materials and flow around the reinforcing fibers to form a matrix. A thermoplastic jacket or coating may then be extruded or otherwise applied to the exterior of the braided tubular element.
Inventors
- 👤 Robert D. Ainsworth
- 👤 Bruce H. Wand
- 👤 David T. Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:11
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61M25/0043; A61M25/005; A61M25/01; A61M2025/0183; A61M2025/1043; A61M2025/1093
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
158 words
A fixed-wire dilatation catheter for performing angioplasty procedures within a patient's arterial system comprising: a) a catheter shaft of braided composite construction having an inflation port in a distal portion thereof which has be formed by: braiding into a tubular structure a plurality of the compressible, multifilament strands which have dispersed therein a relatively low melting point polymeric matrix material, subjecting the braided tubular structure to sufficient heat to form a molten polymer matrix from the low melting point polymeric matrix material dispersed within the multifilament strands, and cooling the molten polymer matrix to a temperature below the melting point thereof; b) a shapeable guide member which is secured to the distal end of the catheter shaft; and c) an inflatable member having proximal and distal ends with the proximal end being bonded to the catheter shaft at a location proximal to the inflation port and the distal end sealed about the shapeable guide member which extends therethrough.
Claim 2
Dependent Claim
158 words
A fixed-wire dilatation catheter for performing angioplasty procedures within a patient's arterial system comprising: a) a catheter shaft of braided composite construction having an inflation port in a distal portion thereof which has be formed by: braiding into a tubular structure a plurality of the compressible, multifilament strands which have dispersed therein a relatively low melting point polymeric matrix material, subjecting the braided tubular structure to sufficient heat to form a molten polymer matrix from the low melting point polymeric matrix material dispersed within the multifilament strands, and cooling the molten polymer matrix to a temperature below the melting point thereof; b) a shapeable guide member which is secured to the distal end of the catheter shaft; and c) an inflatable member having proximal and distal ends with the proximal end being bonded to the catheter shaft at a location proximal to the inflation port and the distal end sealed about the shapeable guide member which extends therethrough.
Claim 3
Dependent Claim
27 words
The dilatation catheter of claim 1 wherein the composite shaft has a plurality of reinforcing ribbons extending parallel to each other within a wall of the shaft.
Claim 4
Dependent Claim
36 words
The dilatation catheter of claim 2 wherein at least three reinforcing ribbons are helically disposed within the wall of the composite shaft and are selected from the group consisting of stainless steel and superelastic NiTi alloy.
Claim 5
Dependent Claim
31 words
The dilatation catheter of claim 1 wherein a thermoplastic coating or jacket is provided on the exterior of the composite shaft having a thickness of about 0.0005 to about 0.002 inch.
Claim 6
Dependent Claim
26 words
The dilatation catheter of claim 1 wherein the flexible distal tip includes a core member which is secured to the distal end of the catheter shaft.
Claim 7
Dependent Claim
24 words
The dilatation catheter of claim 5 wherein a shapeable ribbon is secured by its proximal end to the distal end of the composite shaft.
Claim 8
Dependent Claim
40 words
The dilatation catheter of claim 6 wherein the flexible distal tip has a helical coil disposed about the core member and about the ribbon and the ribbon is secured by its distal end to the distal end of the coil.
Claim 9
Dependent Claim
41 words
The dilatation catheter of claim 5 wherein the flexible distal tip is provided with a helical coil disposed about the core member and the core member is secured by its distal end to the distal end of the of the coil.
Claim 10
Dependent Claim
27 words
The dilatation catheter of claim 1 wherein the catheter shaft is formed of a braided high strength polymeric fiber in a low melting point thermoplastic polymer matrix.
Claim 11
Independent Claim
79 words
A method of forming a small diameter flexible composite shaft, comprising: a) braiding into a tubular structure a plurality of the compressible, multifilament strands which have dispersed therein a relatively low melting point polymeric matrix material; b) subjecting the braided tubular structure to sufficient heat to form a molten polymer matrix from the low melting point polymeric matrix material dispersed within the multifilament strands; and c) cooling the molten polymer matrix to a temperature below the melting point thereof.
Claim 12
Independent Claim
79 words
A method of forming a small diameter flexible composite shaft, comprising: a) braiding into a tubular structure a plurality of the compressible, multifilament strands which have dispersed therein a relatively low melting point polymeric matrix material; b) subjecting the braided tubular structure to sufficient heat to form a molten polymer matrix from the low melting point polymeric matrix material dispersed within the multifilament strands; and c) cooling the molten polymer matrix to a temperature below the melting point thereof.
Claim 13
Dependent Claim
20 words
The method of claim 10 wherein the amount of matrix material ranges from about 40% to about 80% (by wt).
Claim 14
Dependent Claim
24 words
The method of claim 10 wherein the polymeric matrix material is dispersed into the high strength fibers in the form of fibers or powder.
Claim 15
Dependent Claim
20 words
The method of claim 10 wherein the reinforcing fibers are selected from the group consisting of aramid, nylon and polyesters.
Claim 16
Dependent Claim
37 words
The method of claim 10 wherein the polymeric matrix material is a low melting point thermoplastic polymer selected from the group consisting of polyester, polyethylene terephthalate and polyethylene terephthalate glycol and mixtures thereof with other polymer materials.
Claim 17
Dependent Claim
102 words
A composite flexible small diameter tubular member comprising a relatively low melting point thermoplastic polymer matrix with braided high strength polymeric reinforcing strands disposed within the matrix, said tubular structure having been formed by, a) braiding into a tubular structure a plurality of the compressible, multifilament strands which have dispersed therein a relatively low melting point polymeric matrix material; b) subjecting the braided tubular structure to sufficient heat to form a molten polymer matrix from the low melting point polymeric matrix material dispersed within the multifilament strands; and c) cooling the molten polymer matrix to a temperature below the melting point thereof.
Claim 18
Dependent Claim
102 words
A composite flexible small diameter tubular member comprising a relatively low melting point thermoplastic polymer matrix with braided high strength polymeric reinforcing strands disposed within the matrix, said tubular structure having been formed by, a) braiding into a tubular structure a plurality of the compressible, multifilament strands which have dispersed therein a relatively low melting point polymeric matrix material; b) subjecting the braided tubular structure to sufficient heat to form a molten polymer matrix from the low melting point polymeric matrix material dispersed within the multifilament strands; and c) cooling the molten polymer matrix to a temperature below the melting point thereof.
Claim 19
Dependent Claim
23 words
The guiding or angiography catheter of claim 15 including a soft distal tip to prevent or minimize traumatic engagement with blood vessel lining.
Claim 20
Dependent Claim
106 words
A balloon catheter for performing diagnostic or therapeutic procedures within a patient's body lumen, comprising: a) an elongated catheter shaft having proximal and distal ends and having outer tubular member with a braided composite construction with an inflation port in a distal portion thereof; b) a shapable guide member which is secured to the distal end of the catheter shaft; and c) an inflatable member having proximal and distal ends with the proximal end of the inflatable member being bonded to the catheter shaft at a location proximal to the inflation port and with the distal end sealed about the shapable guide member which extends therethrough.
Claim 21
Dependent Claim
106 words
A balloon catheter for performing diagnostic or therapeutic procedures within a patient's body lumen, comprising: a) an elongated catheter shaft having proximal and distal ends and having outer tubular member with a braided composite construction with an inflation port in a distal portion thereof; b) a shapable guide member which is secured to the distal end of the catheter shaft; and c) an inflatable member having proximal and distal ends with the proximal end of the inflatable member being bonded to the catheter shaft at a location proximal to the inflation port and with the distal end sealed about the shapable guide member which extends therethrough.
Claim 22
Dependent Claim
119 words
A guiding or angiography catheter for performing diagnostic or therapeutic procedures within a patient's arterial system comprising a catheter shaft of braided composite construction and formed of a relatively low melting point polymeric matrix with braided high strength reinforcing polymeric strands disposed within the matrix, said catheter having been formed by; a) braiding into a tubular structure a plurality of the compressible, multifilament strands which have dispersed therein a relatively low melting point polymeric matrix material; b) subjecting the braided tubular structure to sufficient heat to form a molten polymer matrix from the low melting point polymeric matrix material dispersed within the multifilament strands; and c) cooling the molten polymer matrix to a temperature below the melting point thereof.
Claim 23
Dependent Claim
119 words
A guiding or angiography catheter for performing diagnostic or therapeutic procedures within a patient's arterial system comprising a catheter shaft of braided composite construction and formed of a relatively low melting point polymeric matrix with braided high strength reinforcing polymeric strands disposed within the matrix, said catheter having been formed by; a) braiding into a tubular structure a plurality of the compressible, multifilament strands which have dispersed therein a relatively low melting point polymeric matrix material; b) subjecting the braided tubular structure to sufficient heat to form a molten polymer matrix from the low melting point polymeric matrix material dispersed within the multifilament strands; and c) cooling the molten polymer matrix to a temperature below the melting point thereof.
Claim 24
Dependent Claim
22 words
The dilatation catheter of claim 17 wherein at least three reinforcing ribbons are helically disposed within the wall of the composite shaft.
Claim 25
Dependent Claim
27 words
The dilatation catheter of claim 17 wherein the reinforcing ribbons are formed of a material selected from the group consisting of stainless steel and superelastic NiTi alloy.
References Cited (Backward Citations)
US4439185A
Cited
US4468224A
Cited
US4516972A
Cited
US4554929A
Cited
US4582181A
Cited
USRE33166E
Cited
US4538622A
Cited
US4773406A
Cited
US4619263A
Cited
US4664113A
Cited
US4638805A
Cited
US4641654A
Cited
US4748986A
Cited
US4793350A
Cited
US4771778A
Cited
US4827941A
Cited
US4998923A
Cited
US4981478A
Cited
US4898577A
Cited
US4966163A
Cited
US5057338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-28 | 1997-08-30 | 1998-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-28 | 2001-08-30 | 2002-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-28 | 2005-08-30 | 2006-03-01 | $7700.00 | Window Closed / Lapsed |