CA2265034C - Embolic coil hydraulic deployment system - Google Patents
Embolic coil hydraulic deployment system Download PDFInfo
- Publication number
- CA2265034C CA2265034C CA002265034A CA2265034A CA2265034C CA 2265034 C CA2265034 C CA 2265034C CA 002265034 A CA002265034 A CA 002265034A CA 2265034 A CA2265034 A CA 2265034A CA 2265034 C CA2265034 C CA 2265034C
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- Prior art keywords
- catheter
- coil
- durometer
- deployment system
- section
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
- A61B17/12109—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/1214—Coils or wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00535—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated
- A61B2017/00539—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated hydraulically
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B2017/1205—Introduction devices
- A61B2017/12054—Details concerning the detachment of the occluding device from the introduction device
- A61B2017/12081—Details concerning the detachment of the occluding device from the introduction device detachable by inflation
Abstract
A medical device for placing an embolic coil at a preselected location within a vessel comprising a positioning catheter having a distal tip for retaining the embolic coil which when pressurized with a fluid expands outwardly to release the coil at the preselected position.
Description
CA 02265034 1999-03-08
EMBOLIC COIL HYDRAULIC DEPLOYMENT SYSTEM
Grant Hieshima
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to a medical device for placing
an embolic coil at a preselected location within a vessel of the
5 human body, and more particularly, relates to a catheter having a
distal tip for retaining the embolic coil in order to transport the
coil to a preselected position within the vessel and a control
mechanism for releasing the embolic coil at the preselected
position.
10 Description of the Prior Art
For many years flexible catheters have been used to place
various devices within the vessels of the human body. Such devices
include dilatation balloons, radiopaque fluids, liquid medications
and various types of occlusion devices such as balloons and embolic
15 coils. Examples of such catheter devices are disclosed in U.S.
Patent No. 5,108,407, entitled "Method And Apparatus For Placement
Of An Embolic Coil"; U.S. Patent No. 5,122,136, entitled,
âEndovascular Electrolytically Detachable Guidewire Tip For The
Electroformation Of Thrombus In Arteries, Veins, Aneurysms,
20 Vascular Malformations And Arteriovenous Fistulas.â These patents
disclose devices for delivering embolic coils to preselected
position within vessel of the human body in order to treat
aneurysms or alternatively to occlude the blood vessel at the
particular location.
,9,,M4.;<//57/5â
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Coils which are placed in vessels may take the form of
helically wound coils, or alternatively, may be random wound coils,
coils wound within other coils or many other such coil
configurations. Examples of various coil configurations are
disclosed in U.S. Patent No. 5,334,210, entitled, "Vascular
Occlusion Assembly; U.S. Patent No. 5,382,259, entitled,
âVasoocclusion Coil with Attached Tubular Woven Or Braided Fibrous
Coverings." Embolic coils are generally formed of a radiopaque
metallic materials, such as platinum, gold, tungsten or alloys of
these metals. Often times several coils are placed at a given
location in order to occlude the flow of blood through the vessel
by promoting thrombus formation at the particular location.
In the past, embolic coils have been placed within the distal
end of the catheter and when the distal end of the catheter is
properly positioned the coil may then be pushed out of the end of
the catheter with, for example a guidewire, to release the coil at
the desired location. This procedure of placement of the embolic
coil is conducted under fluoroscopic visualization such that the
movement of the coil through the vasculature of the body may be
monitored and the coil may be placed in the desired location. with
these placements systems there is very little control over the
exact placement of the coil since the coil may be ejected to a
position some distance beyond the end of the catheter. As is
apparent, with these latter systems, when the coil has been
released from the catheter it is difficult, if not impossible, to
retrieve the coil or to reposition the coil.
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Numerous procedures have been developed to enable more
accurate positioning of coils within a vessel. Still another such
procedure involves the use of a glue or solder for attaching the
embolic coil to a guidewire which, is in turn, placed within a
flexible catheter for positioning the coil within the vessel at a
preselected position. Once the coil is at the desired position,
the coil is restrained by the catheter and the guidewire is pulled
from the proximal end of the catheter to thereby cause the coil to
be detached from the guidewire and released from the catheter
system. Such a coil positioning system is disclosed in U.S. Patent
5,263,964, entitled, "Coaxial Traction Detachment Apparatus And
Method.â
Another coil positioning system utilizes a catheter having a
socket at the distal end of the catheter for retaining a ball which
is bonded to the proximal end of the coil. The ball, which is
larger in diameter than the outside diameter of the coil, is placed
in a socket within the lumen at the distal end of the catheter and
the catheter is then moved into a vessel in order to place the coil
at a desired position. Once the position is reached, a pusher wire
with a guston at the end thereof is pushed distally from the
proximal end of the catheter to thereby push the ball out of the
socket in order to thereby release the coil at the desired
position. Such a system is disclosed in U.S. Patent No. 5,350,397,
entitled, âAxially Detachable Embolic Coil Assembly.â One problem
with this type of coil placement system which utilizes a pusher
wire which extends through the entire length of the catheter and
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which is sufficiently stiff to push an attachment ball out of
engagement with the socket at the distal end of the catheter is
that the pusher wire inherently causes the catheter to be too stiff
with the result that it is very difficult to guide the catheter
through the vasculature of the body.
Another method for placing an embolic coil is that of
utilizing a heat releasable adhesive bond for retaining the coil at
the distal end of the catheter. One such system uses laser energy
which is transmitted through a fiber optic cable in order to apply
heat to the adhesive bond in order to release the coil from the end
of the catheter. Such a method is disclosed in U.S. Patent No.
5,108,407, entitled, "Method And Apparatus For Placement Of An
Embolic Coil.â Such a system also suffers from the problem of
having a separate element which extends throughout the length of
the catheter with the resulting stiffness of the catheter.
SUMMARY OF THE INVENTION
The present invention is directed toward a vascular occlusive
coil deployment system for use in placing an embolic coil at a
preselected site withhi a vessel which includes an elongated,
flexible catheter having a distal tip for retaining the coil so
that the coil may be moved to the preselected position within the
vessel. The catheter has a lumen which extends therethrough the
length of the catheter and also includes a distal end which is
formed of a material having a durometer such that when a fluid
pressure of about 300 pounds per square inch (psi) is applied to
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the interior of the catheter, the walls of the distal tip expand
outwardly, or radially, to thereby increase the lumen of the distal
tip of the catheter. The proximal end of the embolic coil is
placed into the lumen of the distal tip of the catheter and is
retained by the distal tip of the catheter. A hydraulic injector,
such as a syringe, is coupled to the proximal end of the catheter
for applying a fluid pressure to the interior of the catheter.
When the coil is placed at a desired position within a vessel,
fluid pressure is then applied to the interior of the catheter by
the hydraulic injector to thereby cause the walls of the distal tip
to expand outwardly to thereby release the coil for placement in
the vessel.
In accordance with another aspect of the present invention,
the flexible catheter is comprised of a proximal section and a
relatively short distal section. The proximal section is formed of
a material which is sufficiently flexible to be passed through the
vasculature of the human body and is of a durometer which
essentially resists outward expansion when a fluid pressure on the
order of about 300 psi is applied to the interior of the catheter.
The distal section of the catheter is formed of a material which is
also sufficiently flexible to be passed through the vasculature of
the body, yet is of a durometer which is significantly lower than
the durometer of the proximal section and exhibits the property of
expanding outwardly, or radially, when such a fluid pressure is
applied to the interior of the catheter to thereby permit the
release of the embolic coil.
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In accordance with still another aspect of the present
invention, the distal section of the catheter has a durometer in a
range of between about 25D and 55D.
In still another aspect of the present invention, the embolic
coil is comprised of a helical coil having a proximal end, a distal
end, and a lumen extending therethrough. A seal plug is disposed
within the lumen of the proximal end of the coil in fluid-tight
engagement. The proximal end of the coil is disposed in a fluid-
tight engagement within the lumen of the distal section of the
catheter and is retained by the lumen of the catheter for
subsequent release.
In another aspect of the present invention, the hydraulic
injector for applying a fluid pressure to the interior of the
catheter takes the fonn of a syringe which is coupled to the
proximal end of the catheter for, upon movement of the piston,
creating a fluid pressure which is applied to the interior of the
catheter to thereby cause the release of the embolic coil.
In accordance with another aspect of the present invention,
âthe embolic coil may take the form of other types of implantable
devices, such as a vascular filter.
In another aspect of the present invention, there is provided
a method for placing an embolic coil with a selected site within a
vessel of the body comprising the steps of advancing a catheter
through the vasculature of the body to place an embolic coil which
is retained within the lumen of the distal tip of the catheter to
a preselected site, applying a fluid pressure to the interior of
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the catheter to thereby cause the distal tip of the catheter to
expand radially outwardly to release the embolic coil at the
preselected site, and withdrawing the catheter from the vasculature
system.
These aspects of the invention and the advantages thereof will
be more clearly understood from the following description and
drawings of a preferred embodiment of the present invention:
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is an enlarged, partial sectional view of the
hydraulic vascular occlusive coil deployment system of the present
invention;
Figure 2 is an enlarged partially sectional View showing the
distal end of the coil deployment system prior to deployment of the
coil;
Figure 3 and 4 illustrate the sequential steps in the radial
expansion of the distal tip of the coil deployment system as the
embolic coil is released; and
Figure 5 illustrates the distal tip of the coil deployment
system after release of the embolic coil.
DESCRIPTION OF A PREFERRED EMBODIMENT
Figure 1 generally illustrates the vascular occlusive coil
deployment system 100 which is comprised of a hydraulic injector or
syringe 102, coupled to the proximal end of a catheter 104. An
embolic coil 106 is disposed within the lumen of the distal end 108
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of the catheter. The proximal end of the coil 106 is tightly held
within the lumen of the distal section 108 of the catheter 104
until the deployment system is activated for release of the coil.
As may be seen, the syringe 102 includes a threaded piston 110
which is controlled by a handle 112 for infusing fluid into the
interior of the catheter 104. Also as illustrated, the catheter
104 includes a winged hub 114 which aides in the insertion of the
catheter into the vascular system of the body.
Figure 2 illustrates in more detail the distal end of the
catheter 104. The catheter 104 includes a proximal section 116 and
the distal section 108. The proximal section 118 of the embolic
coil 106 is disposed within the distal section 108 of the catheter
and is tightly held within the lumen 120 of this distal section 108
prior to release of the coil. As may be appreciated, Figure 2
illustrates the vascular occlusive coil deployment system prior to
activation of the piston of the syringe and prior to release of the
coil.
The embolic coil 106 may take various forms and configurations
and may even take the form of a randomly wound coil, however, with
the helical wound coil as illustrated in Figure 2, the coil is
provided with a weld bead or seal plug 122 which is disposed in a
lumen 123 which lumen extends throughout the length of the coil
106. The seal plug 122 serves to prevent the flow of fluid through
the lumen of the coil 106 so that when the coil 106 is placed in
serves to
fluid-tight engagement with the lumen 120 the coil
provide a fluid-tight seal at the distal end of the catheter 104.
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Adjacent turns of the coil 106 at the proximal end 118 of the coil
are preferably continuously welded together so that the welded
turns of the coil in conjunction with the plug seal 122 provide a
generally unitary structure which serves to plug or seal the distal
end of the catheter in a fluid tight relationship.
Preferably, the proximal section 116 and the distal section
108 of the catheter 104 are formed of materials having different
durometers. The proximal section 116 is preferably formed of Pebax
material having a durometer in a range of about 62D to 75D. The
proximal section is sufficiently flexible to transverse the
vasculature of the human body, but is sufficiently rigid such that
when a fluid pressure of approximately 300 psi is applied to the
interior of this section of the catheter there is very little, if
any, radial expansion of the walls of this section. On the other
hand, the distal section 108 of the catheter is preferably formed
of polymer material with a relatively low durometer which, exhibits
the characteristic that when a fluid pressure of approximately 300
psi is applied to the interior of the catheter the walls of the
distal section 108 expand radially, somewhat similar to the action
of a balloon inflating, to thereby release the proximal end 118 of
the coil 106. As may be appreciated, there are numerous materials
which could be used to fabricate the proximal section 116 and
distal section 108 of the catheter 104, however, the distal section
108 is preferably formed from a block copolymer such as Pebax
having a durometer of between 25D and 55D with a durometer of 40D
being the preferred durometer.
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illustrate the coil release
and 4 generally
Figures 3
mechanism in action for the vascular occlusive catheter deployment
system. More particularly, as shown in Figure 3, when a hydraulic
pressure is applied to the interior 124 of the catheter 104 the
relatively low durometer distal section 108 of the catheter begins
to expand radially, much as a balloon expands during the process of
inflation. As the distal section 108 continues to expand radially
there comes a point as illustrated in Figure 4 in which the coil
lO6 becomes disengaged from the lumen of the distal section 108 and
the coil is then released from the catheter and is deployed at that
location within the vessel.
As illustrated in Figure 5, when the coil 106 has been
released from the catheter 104 the catheter may then be withdrawn
leaving the coil positioned at the desired site.
With the vascular occlusive coil deployment system of the
present invention it is possible to place an embolic coil very
precisely at a desired location within a vessel. Once the coil has
been placed in that location by use of the catheter, the catheter
may be activated by applying a hydraulic pressure to the interior
of the catheter to thereby cause the catheter to release the coil
and deposit the coil very accurately at the desired location.
As is apparent, there are numerous modifications of the
preferred embodiment described above which will be readily apparent
skilled in the art, such as many variations and
CO one
modifications of the coil including numerous coil winding
configurations, or alternatively other types of implant devices,
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such as a vascular filter. Also, there are obviously Variations of
the syringe arrangement for applying a fluid pressure to the
interior of the catheter, including many other fluid pressure
generating systems for increasing the pressure within the interior
of a catheter in order to cause the distal section of the catheter
to expand. These modifications would be apparent to those having
ordinary skill in the art to which this invention relates and are
intended to be within the scope of the claims which follow.
H
Claims (22)
1. A vasoocclusive coil deployment system for use in placing a coil at a preselected site within a vessel comprising:
an elongated flexible catheter having a lumen extending therethrough and having a proximal section and a distal section, said distal section of the catheter being formed of a material having a durometer which exhibits the characteristic that when a fluid pressure is applied to the interior of the catheter the walls of the distal section of the catheter expand outwardly;
an embolic coil being disposed in fluid-tight engagement within the lumen of the distal section of the catheter; and, a syringe coupled to the proximal section of the catheter for applying a fluid pressure to the interior of the catheter to thereby cause the distal section of the catheter to expand outwardly to thereby release the embolic coil.
an elongated flexible catheter having a lumen extending therethrough and having a proximal section and a distal section, said distal section of the catheter being formed of a material having a durometer which exhibits the characteristic that when a fluid pressure is applied to the interior of the catheter the walls of the distal section of the catheter expand outwardly;
an embolic coil being disposed in fluid-tight engagement within the lumen of the distal section of the catheter; and, a syringe coupled to the proximal section of the catheter for applying a fluid pressure to the interior of the catheter to thereby cause the distal section of the catheter to expand outwardly to thereby release the embolic coil.
2. A vasoocclusive coil deployment system as defined in Claim 1, wherein said proximal section of said catheter is formed of a material which is sufficiently flexible to be passed through the vasculature of the body and is formed of a material which exhibits the characteristic of having substantially no radial expansion when a fluid pressure of about 300 psi is applied to the interior of the catheter, a distal tip is formed of a material which is also sufficiently flexible to be passed through the vasculature of the body and is of a durometer which is substantially lower than the durometer of the proximal section.
3. A vasoocclusive coil deployment system as defined in Claim 2, wherein the distal tip of the catheter is formed of a polymer having a durometer in a range of between about 25D and 55D.
4. A vasoocclusive coil deployment system as defined in Claim 2, wherein the distal tip of the catheter has a durometer of about 40D.
5. A vasoocclusive coil deployment system as defined in Claim 3, wherein the vasoocclusive coil is comprised of a helical coil having a proximal end, a distal end and a lumen extending therethrough, a seal plug is disposed in fluid-tight engagement within the lumen at the proximal end of the coil and the proximal end of the coil is disposed within the lumen of the distal section of the catheter.
6. A vasoocclusive coil deployment system as defined in Claim 3, wherein said proximal section of said catheter is formed of a polymer having a durometer in a range of 62D to 75D.
7. A vasoocclusive coil deployment system for use in placing a coil at a preselected site within a vessel comprising:
an elongated flexible catheter having a lumen extending therethrough and having a proximal section and a distal section, said distal section of the catheter being formed of a material having a durometer which exhibits the characteristic that when a fluid pressure of about 300 psi applied to the interior of the catheter the walls of the distal section of the catheter expand outwardly;
an embolic coil being disposed in fluid-tight engagement within the lumen of the distal section of the catheter; and, a piston coupled to the proximal section of the catheter for applying a fluid pressure to the interior of the catheter to thereby cause the distal section of the catheter to expand outwardly to thereby release the embolic coil.
an elongated flexible catheter having a lumen extending therethrough and having a proximal section and a distal section, said distal section of the catheter being formed of a material having a durometer which exhibits the characteristic that when a fluid pressure of about 300 psi applied to the interior of the catheter the walls of the distal section of the catheter expand outwardly;
an embolic coil being disposed in fluid-tight engagement within the lumen of the distal section of the catheter; and, a piston coupled to the proximal section of the catheter for applying a fluid pressure to the interior of the catheter to thereby cause the distal section of the catheter to expand outwardly to thereby release the embolic coil.
8. A vasoocclusive coil deployment system as defined in Claim 7, wherein said proximal section of said catheter is formed of a material which is sufficiently flexible to be passed through the vasculature of the body and is formed of a material which exhibits the characteristic of having substantially no radial expansion when a fluid pressure of about 300 psi is applied to the interior of the catheter, a distal tip is formed of a material which is also sufficiently flexible to be passed through the vasculature of the body and is of a durometer which is substantially lower than the durometer of the proximal section.
9. A vasoocclusive coil deployment system as defined in Claim 8, wherein the distal tip of the catheter is formed of a polymer having a durometer in a range of between about 25D and 55D.
10. A vasoocclusive coil deployment system as defined in Claim 8, wherein the distal tip of the catheter has a durometer of about 40D.
11. A vasoocclusive coil deployment system as defined in Claim 9, wherein the vasoocclusive coil is comprised of a helical coil having a proximal end, a distal end and a lumen extending therethrough, a seal plug is disposed in fluid-tight engagement within the lumen at the proximal end of the coil and the proximal end of the coil is disposed within the lumen of the distal section of the catheter.
12. A vasoocclusive coil deployment system as defined in Claim 9, wherein said proximal section of said catheter is formed of a polymer having a durometer in a range of about 62D to 75D.
13. A vasoocclusive coil deployment system for use in placing a coil at a preselected site within a vessel comprising:
an elongated flexible catheter having a lumen extending therethrough and having a proximal section and a distal section, said distal section of the catheter being formed of a material having a durometer which exhibits the characteristic that when a fluid pressure of about 300 psi applied to the interior of the catheter the walls of the distal section of the catheter expand outwardly;
an embolic coil being disposed in fluid-tight engagement within the lumen of the distal section of the catheter; and, a fluid pressure generating device coupled to the proximal section of the catheter for applying a fluid pressure to the interior of the catheter to thereby cause the distal section of the catheter to expand outwardly to thereby release the embolic coil.
an elongated flexible catheter having a lumen extending therethrough and having a proximal section and a distal section, said distal section of the catheter being formed of a material having a durometer which exhibits the characteristic that when a fluid pressure of about 300 psi applied to the interior of the catheter the walls of the distal section of the catheter expand outwardly;
an embolic coil being disposed in fluid-tight engagement within the lumen of the distal section of the catheter; and, a fluid pressure generating device coupled to the proximal section of the catheter for applying a fluid pressure to the interior of the catheter to thereby cause the distal section of the catheter to expand outwardly to thereby release the embolic coil.
14. A vasoocclusive coil deployment system as defined in Claim 13, wherein said proximal section of said catheter is formed of a material which is sufficiently flexible to be passed through the vasculature of the body and is formed of a material which exhibits the characteristic of having substantially no radial expansion when a fluid pressure of about 300 psi is applied to the interior of the catheter, a distal tip is formed of a material which is also sufficiently flexible to be passed through the vasculature of the body and is of a durometer which is substantially lower than the durometer of the proximal section.
15. A vasoocclusive coil deployment system as defined in Claim 14, wherein the distal section of the catheter is formed of a polymer having a durometer in a range of between about 25 D and 55 D.
16. A vasoocclusive coil deployment system as defined in Claim 14, wherein the distal tip of the catheter has a durometer of about 40D.
17. A vasoocclusive coil deployment system as defined in Claim 13, wherein the vasoocclusive coil is comprised of a helical coil having a proximal end, a distal end and a lumen extending therethrough, a seal plug is disposed in fluid-tight engagement within the lumen at the proximal end of the coil and the proximal end of the coil is disposed within the lumen of the distal section of the catheter.
18. An implant device deployment system for use in placing an implant device at a preselected site within a vessel comprising:
an elongated flexible catheter having a lumen extending therethrough and having a proximal section and a distal section, said distal section of the catheter being formed of a material having a durometer which exhibits the characteristic that when a fluid pressure of about 300 psi applied to the interior of the catheter the walls of the distal section of the catheter expand outwardly;
an implant device being disposed in fluid-tight engagement within the lumen of the distal section of the catheter; and, a piston coupled to the proximal section of the catheter for applying a fluid pressure to the interior of the catheter to thereby cause the distal section of the catheter to expand outwardly to thereby release the implant device.
an elongated flexible catheter having a lumen extending therethrough and having a proximal section and a distal section, said distal section of the catheter being formed of a material having a durometer which exhibits the characteristic that when a fluid pressure of about 300 psi applied to the interior of the catheter the walls of the distal section of the catheter expand outwardly;
an implant device being disposed in fluid-tight engagement within the lumen of the distal section of the catheter; and, a piston coupled to the proximal section of the catheter for applying a fluid pressure to the interior of the catheter to thereby cause the distal section of the catheter to expand outwardly to thereby release the implant device.
19. An implant device deployment system as defined in Claim 18, wherein said proximal section of said catheter is formed of a material which is sufficiently flexible to be passed through the vasculature of the body and is formed of a material which exhibits the characteristic of having substantially no radial expansion when a fluid pressure of about 300 psi is applied to the interior of the catheter, a distal tip is formed of a material which is also sufficiently flexible to be passed through the vasculature of the body and is of a durometer which is substantially lower than the durometer of the proximal section.
20. An implant device deployment system as defined in Claim 19, wherein the distal tip of the catheter is formed of a polymer having a durometer in a range of between about 25 D and 55 D.
21. An implant device deployment system as defined in Claim 19, wherein the distal tip of the catheter has a durometer of about 40 D.
22. An implant device deployment system as defined in Claim 19, wherein the implant device includes a seal plug which is coupled to the implant device and which is disposed within the lumen of the distal section of the catheter.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US7746898P | 1998-03-10 | 1998-03-10 | |
US60/077,468 | 1998-03-10 |
Publications (2)
Publication Number | Publication Date |
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CA2265034A1 CA2265034A1 (en) | 1999-09-10 |
CA2265034C true CA2265034C (en) | 2008-07-08 |
Family
ID=22138234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CA002265034A Expired - Lifetime CA2265034C (en) | 1998-03-10 | 1999-03-08 | Embolic coil hydraulic deployment system |
Country Status (5)
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US (4) | US6113622A (en) |
EP (1) | EP0941703B1 (en) |
JP (1) | JP3930188B2 (en) |
CA (1) | CA2265034C (en) |
DE (1) | DE69931208T2 (en) |
Families Citing this family (116)
Publication number | Priority date | Publication date | Assignee | Title |
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US6254612B1 (en) | 1998-10-22 | 2001-07-03 | Cordis Neurovascular, Inc. | Hydraulic stent deployment system |
US6102932A (en) | 1998-12-15 | 2000-08-15 | Micrus Corporation | Intravascular device push wire delivery system |
JP2000234622A (en) * | 1999-02-17 | 2000-08-29 | Nippon Piston Ring Co Ltd | Sliding member |
US6351547B1 (en) * | 1999-04-28 | 2002-02-26 | General Electric Company | Method and apparatus for formatting digital images to conform to communications standard |
-
1998
- 1998-10-22 US US09/177,848 patent/US6113622A/en not_active Expired - Lifetime
-
1999
- 1999-03-08 CA CA002265034A patent/CA2265034C/en not_active Expired - Lifetime
- 1999-03-09 EP EP99301776A patent/EP0941703B1/en not_active Expired - Lifetime
- 1999-03-09 DE DE69931208T patent/DE69931208T2/en not_active Expired - Lifetime
- 1999-03-09 JP JP06230299A patent/JP3930188B2/en not_active Expired - Lifetime
-
2000
- 2000-08-17 US US09/641,552 patent/US6361547B1/en not_active Expired - Fee Related
-
2002
- 2002-03-19 US US10/102,152 patent/US6958068B2/en not_active Expired - Lifetime
-
2005
- 2005-01-31 US US11/047,053 patent/US7758588B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0941703A1 (en) | 1999-09-15 |
US20050131454A1 (en) | 2005-06-16 |
EP0941703B1 (en) | 2006-05-10 |
US20020138096A1 (en) | 2002-09-26 |
JP3930188B2 (en) | 2007-06-13 |
DE69931208T2 (en) | 2007-03-01 |
US6958068B2 (en) | 2005-10-25 |
US6361547B1 (en) | 2002-03-26 |
JPH11313828A (en) | 1999-11-16 |
US6113622A (en) | 2000-09-05 |
DE69931208D1 (en) | 2006-06-14 |
CA2265034A1 (en) | 1999-09-10 |
US7758588B2 (en) | 2010-07-20 |
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