EP0820782A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Micro-braided catheter guidewire
Assignee: Target Therapeutics Inc
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Filing: 1997-07-10
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Granted: —
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Expires: 2017-07-10
Abstract
Abstract This is a composite guidewire for use in a catheter. It is used in medical procedures that involve accessing specifically targeted inner body areas without major surgery. The composite guidewire is especially useful for accessing peripheral soft tissue targets. The guidewire may be a multi-section guidewire assembly preferably having superelastic alloy ribbon braided reinforcements along at least a portion of the core. The guidewire core may be of a stainless steel or a high elasticity metal alloy, preferably a Ni-Ti alloy. A variation of the guidewire also preferably includes a braid on the exterior of the core wire with an exterior polymeric coating to the most distal portion of the assembly and preferably assembled using adhesives such as epoxies.
Inventors
- 👤 Gene Samson
- 👤 Kim Nguyen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 09:46
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/09; A61M2025/09058; A61M2025/09083; A61M2025/09091; A61M2025/09133; A61M2025/09141; A61M2025/09175
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
100 words
A guidewire suitable for guiding a catheter within
a body lumen, comprising: a) an elongated flexible wire core having a
proximal section, a middle section and a distal end section, b) a coil covering at least a portion of said
distal end section and bonded to said end section distally
with an adhesive, c) a tubular super-elastic alloy braid covering
at least a portion of said middle section and bonded to said
wire core in at least two locations with an adhesive, and d) a polymeric layer covering extending at
least over said middle section and said distal end section.
Claim 2
Dependent Claim
99 words
A guidewire suitable for guiding a catheter within
a body lumen comprising: a) an elongated flexible wire core having a
proximal section, a middle section and a distal end section, b) a coil covering at least a portion of said
distal end section and bonded to said end section distally
with an adhesive, c) a tubular super-elastic alloy braid covering
at least a portion of said middle section and fastened to
said wire core by incomplete interfacial bonding with an
adhesive, and d) a polymeric layer covering extending at
least over said middle section and said distal end section.
Claim 3
Dependent Claim
15 words
The guidewire of claim 1 or claim 2, wherein the
core comprises a super-elastic alloy.
Claim 4
Dependent Claim
15 words
The guidewire of claim 1 or claim 2, wherein the
core comprises a stainless steel.
Claim 5
Dependent Claim
18 words
The guidewire of claim 1 or claim 2, wherein at
least the middle section comprises a super-elastic alloy.
Claim 6
Dependent Claim
18 words
The guidewire of claim 1 or claim 2, wherein at
least the middle section comprises a stainless steel.
Claim 7
Dependent Claim
19 words
The guidewire of claim 1 or claim 2, wherein at
least the distal end section comprises a super-elastic alloy.
Claim 8
Dependent Claim
19 words
The guidewire of claim 1 or claim 2, wherein at
least the distal end section comprises a stainless steel.
Claim 9
Dependent Claim
16 words
The guidewire of any one of the preceding claims,
wherein the coil comprises a super-elastic alloy.
Claim 10
Dependent Claim
27 words
The guidewire of any one of claims 3, 5, 7 and 9,
wherein the super-elastic alloy of said wire core and/or said
coil comprises nickel and titanium.
Claim 11
Dependent Claim
17 words
The guidewire of any one of claims 1 to 8, wherein
the coil comprises a stainless steel.
Claim 12
Dependent Claim
61 words
A guidewire suitable for guiding a catheter within
a body lumen, comprising: a) an elongated flexible wire core, b) a tubular super-elastic alloy braid covering
at least a portion of said wire core and fastened to said
wire core by incomplete interfacial bonding with an adhesive,
and c) a polymeric layer covering extending at
least over said tubular super-elastic alloy braid.
Claim 13
Dependent Claim
12 words
The guidewire of claim 12, wherein the core
comprises a super-elastic alloy.
Claim 14
Dependent Claim
15 words
The guidewire of claim 13, wherein the super-elastic
alloy comprises a nickel and titanium alloy.
Claim 15
Dependent Claim
12 words
The guidewire of claim 12, wherein the core
comprises a stainless steel.
Claim 16
Dependent Claim
20 words
The guidewire of claim 12, wherein the core wire
comprises a composite of a stainless steel and a super-elastic
alloy.
Claim 17
Dependent Claim
15 words
The guidewire of claim 16, wherein the super-elastic
alloy comprises a nickel and titanium alloy.
Claim 18
Dependent Claim
20 words
The guidewire of any one of the preceding claims,
wherein the super-elastic tubular braid comprises a nickel
and titanium alloy.
Claim 19
Dependent Claim
15 words
The guidewire of any one of the preceding claims,
wherein the adhesive comprises an epoxy.
Claim 20
Dependent Claim
25 words
The guidewire of any one of the preceding claims,
wherein the polymeric layer comprises at least one of NYLON,
polyethylene, polystyrene, polyurethane, and polyethylene
terephthalate.
Claim 21
Dependent Claim
13 words
The guidewire of claim 20, wherein the layer
comprises polyethylene terephthalate or polyurethane.
Claim 22
Dependent Claim
10 words
The guidewire of claim 21, wherein the layer is
polyurethane.
Claim 23
Dependent Claim
25 words
The guidewire of any one of the preceding claims,
wherein at least a portion of the polymeric layer is coated
with a lubricious polymeric material.
Claim 24
Dependent Claim
16 words
The guidewire of claim 23, wherein the lubricious
polymeric material comprises at least one hydrophilic
polymer.
Claim 25
Dependent Claim
28 words
The guidewire of any one of the preceding claims,
wherein the polymeric layer comprises a radio-opaque material
selected from barium sulfate, bismuth trioxide, bismuth
carbonate, tungsten, and tantalum.
Claim 26
Dependent Claim
20 words
The guidewire of any one of the preceding claims,
wherein the guidewire additionally comprises an atraumatic
distal tip comprising epoxy.
Claim 27
Dependent Claim
18 words
The guidewire of claim 19, wherein the epoxy
comprises a high-temperature bis-A epichlorohydrin epoxide
resin and polyamine-polyamide hardener.
Claim 28
Dependent Claim
14 words
The guidewire of any one of the preceding claims,
additionally comprising a catheter sheath.
Claim 29
Independent Claim
67 words
A method for sizing a tubular super-elastic alloy
braid to fit a core wire, comprising the steps of: a) placing the core wire within the tubular
super-elastic alloy braid; b) forcibly conforming the super-elastic alloy
braid to the core wire to form an assembly; c) heating the assembly to a temperature above
650° F; d) cooling the assembly to room temperature;
and e) releasing the conforming forces.
Claim 30
Independent Claim
103 words
A method for sizing a tubular super-elastic alloy
braid to fit a core wire having specific dimensions
comprising the steps of: a) placing the tubular super-elastic alloy
braid over a mandrel having the same dimensions as the core
wire at room temperature; b) forcibly conforming the super-elastic alloy
braid to the mandrel to form an assembly; c) heating the assembly to a temperature above
650° F; d) cooling the assembly to room temperature; e) releasing the conforming forces; f) removing the super-elastic alloy braid from
the mandrel; and g) forcibly placing the super-elastic alloy
braid on the core wire to form an assembly.
References Cited (Backward Citations)
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