EP0820729A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Intravascular occlusion removal device
Assignee: Target Therapeutics Inc
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Filing: 1997-07-24
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Granted: —
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Expires: 2017-07-24
Abstract
Abstract This is a medical device. In particular, it is a surgical device usually delivered through an intravascular catheter. It may be used in several ways. It may, for instance, be used to open a clear passageway adjacent thrombus to allow both blood and medication to bypass the clot. It may be used to pierce and to remove thrombus. These thrombus are often found in tortuous vasculature. The device includes several sections. The device has a core element, typically a core wire. Placed around the distal end of the core element is a collapsible but preferably self expanding cage assembly. The cage assembly is preferably radio-opaque. The proximal end of the cage is typically is affixed to an actuator in such a way as to allow expansion of the cage after deployment. The cage assembly may have a generally conical distal or "trailing" portion when expanded and also a proximal section. The cage assembly may be used for collecting emboli or for displacing them to allow blood flow to resume. The proximal section may have various uses, e.g., for centering the collector assembly in the vascular lumen or for gathering larger amounts of the targeted clot or to act as a passageway for fluid flow. The assembly further may have an actuator which permits or causes the collector assembly to expand after deployment.
Inventors
- 👤 Erik T. Engelson
- 👤 Gene Samson
- 👤 Kim Nguyen
- 👤 Rose Y. Wong
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 11:36
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61M; A61M25/00; A61B17/22; A61B17/221; A61B17/320725; A61B17/32075; A61B17/22031; A61B2017/22034; A61B2017/2212; A61F; A61F2/00; A61F2/01; A61F2/013; A61M25/10; A61M2025/1043; A61M2025/1095; A61M29/00; A61M29/02
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
121 words
An embolism treatment device comprising a core
element and a cage assembly: (a) said core element having a distal end and
a proximal end and comprising at least a rotatable core
wire adapted to pass through, to be rotatable with respect
to, and to be non-removable from said cage assembly, and (b) said cage assembly having a distal end and
a proximal end, and comprising a super-elastic alloy braid
substantially coaxial to said core element, said cage
assembly coaxial to said core element and having a first
deployment shape and a second larger expanded shape, said
second larger expanded shape being different from the first
deployment shape, and said cage assembly distal end being
rotatably attached to said rotatable core wire.
Claim 2
Dependent Claim
16 words
The device of claim 1, wherein said first
deployment shape is coaxially adjacent said core wire.
Claim 3
Dependent Claim
58 words
The device of claim 1 or claim 2, further
comprising an actuator element connected proximally to said
cage assembly and wherein said cage assembly has a first
deployment shape adjacent said core wire when said actuator
element is in a first deployment position and said second
expanded shape when said actuator element is in a second
deployment position.
Claim 4
Independent Claim
28 words
The device of any one of the preceding claims,
wherein the cage assembly second expanded shape comprises a
cylindrical section between said distal end and said
proximal end.
Claim 5
Independent Claim
18 words
The device of any one of the preceding claims,
wherein the braid is relatively more tightly woven
distally.
Claim 6
Independent Claim
18 words
The device of any one of the preceding claims,
wherein the braid is relatively less tightly wound
proximally.
Claim 7
Independent Claim
16 words
The device of any one of the preceding claims,
wherein the cage assembly is braided proximally.
Claim 8
Independent Claim
18 words
The device of any one of claims 1 to 6, wherein
the cage assembly is not braided proximally.
Claim 9
Independent Claim
15 words
The device of any one of the preceding claims,
wherein the cage assembly is self-deploying.
Claim 10
Independent Claim
18 words
The device of any one of the preceding claims,
wherein the cage assembly has a decreasing radius distally.
Claim 11
Independent Claim
32 words
The device of any one of the preceding claims,
wherein the core element further comprises a helically
wound radio-opaque coil fixedly attached to said rotatable
core wire distally of the cage element.
Claim 12
Independent Claim
17 words
The device of any one of the preceding claims,
wherein the cage assembly comprises a nickel-titanium
alloy.
Claim 13
Independent Claim
17 words
The device of any one of the preceding claims,
wherein said cage assembly is radio-opaque under
fluoroscopy.
Claim 14
Dependent Claim
29 words
The device of claim 13, wherein said
superelastic alloy braid is comprised of a member selected
from the group consisting of wires and ribbons covered by a
radio-opaque covering.
Claim 15
Dependent Claim
17 words
The device of claim 13, wherein the radio-opaque
covering comprises radio-opaque wire wrapped around
said braid members.
Claim 16
Independent Claim
24 words
The device of any one of claims 1 to 12,
wherein the cage assembly comprises a minor number of
ribbons comprised of radio-opaque alloys.
Claim 17
Independent Claim
22 words
The device of any one of the preceding claims,
wherein the actuator comprises a tubular member fixedly
attached to the cage assembly.
Claim 18
Dependent Claim
13 words
The device of claim 17, wherein said tubular
member further comprises a braid.
Claim 19
Dependent Claim
14 words
The device of claim 18, wherein said tubular
member braid comprises a super-elastic alloy.
Claim 20
Independent Claim
39 words
The device of any one of claims 17 to 19,
wherein said tubular member further has an inner lumen and
an outer surface and has at least one fluid flow orifice
from said inner lumen to said outer surface.
Claim 21
Dependent Claim
66 words
An embolism treatment device comprising: (a) a core element having a distal end and a
proximal end and a longitudinal axis, and (b) a cage assembly comprising at least one
spirally wound, metallic member, wherein said cage assembly
is generally coaxial to said core element and said cage
assembly has a first deployment shape and a second larger
expanded shape different from the first deployment shape.
Claim 22
Dependent Claim
17 words
The device of claim 21, wherein said cage
assembly is fixedly attached to said core element distally.
Claim 23
Dependent Claim
18 words
The device of claim 21 or claim 22, wherein
said first deployment shape is adjacent said core wire.
Claim 24
Independent Claim
21 words
The device of any one of claims 21 to 23,
wherein said second expanded shape comprises a trailing
conical collector section.
Claim 25
Independent Claim
50 words
The device of any one of claims 21 to 24,
further comprising an actuator and wherein said cage
assembly has its said first deployment shape when said
actuator is in a first deployment position and has its said
second expanded shape when said actuator is in a second
deployment position.
Claim 26
Independent Claim
24 words
The device of any one of claims 21 to 25,
wherein the cage assembly further comprises a cylindrical
section proximally of said distal end.
Claim 27
Independent Claim
47 words
The device of any one of claims 21 to 26,
wherein the cage assembly comprises at least two spirally
wound superelastic alloy members selected from the group
consisting of ribbons and wires, said members being wound
respectively clockwise and counter-clockwise about the axis
of the core wire.
Claim 28
Independent Claim
23 words
The device of any one of claims 21 to 27,
wherein the cage assembly comprises a plurality of ribbons
woven into a braid.
Claim 29
Independent Claim
17 words
The device of any one of claims 21 to 28,
wherein the cage assembly is self deploying.
Claim 30
Independent Claim
18 words
The device of any one of claims 21 to 29,
wherein the cage assembly comprises a nickel-titanium
alloy.
Claim 31
Independent Claim
27 words
The device of any one of claims 21 to 30,
wherein the cage assembly is contained in its said first
deployment shape by an electrolytically severable band.
Claim 32
Independent Claim
23 words
The device of any one of claims 21 to 31,
wherein the actuator comprises a tubular member fixedly
attached to the cage assembly.
Claim 33
Independent Claim
31 words
The device of any one of claims 21 to 32,
wherein the core element further comprises a spring element
adapted to deploy said cage assembly to its said second
deployment shape.
Claim 34
Independent Claim
18 words
The device of any one of claims 21 to 33,
wherein said cage assembly is radio-opaque under
fluoroscopy.
Claim 35
Independent Claim
31 words
The device of any one of claims 21 to 34,
wherein said spirally wound metallic member is selected
from the group consisting of wires and ribbons covered by a
radio-opaque covering.
Claim 36
Dependent Claim
19 words
The device of claim 35, wherein the radio-opaque
covering comprises radio-opaque wire wrapped around
said spirally wound metallic member.
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