US20140343592A1 - Embolism filter with self-deployable guidewire stop - Google Patents
Embolism filter with self-deployable guidewire stop Download PDFInfo
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- US20140343592A1 US20140343592A1 US14/230,752 US201414230752A US2014343592A1 US 20140343592 A1 US20140343592 A1 US 20140343592A1 US 201414230752 A US201414230752 A US 201414230752A US 2014343592 A1 US2014343592 A1 US 2014343592A1
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- Prior art keywords
- guidewire
- filter
- stop
- balloons
- stops
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2/013—Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2/011—Instruments for their placement or removal
-
- A61F2002/011—
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2/013—Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
- A61F2002/015—Stop means therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
- A61F2002/018—Filters implantable into blood vessels made from tubes or sheets of material, e.g. by etching or laser-cutting
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0004—Rounded shapes, e.g. with rounded corners
- A61F2230/0006—Rounded shapes, e.g. with rounded corners circular
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0063—Three-dimensional shapes
- A61F2230/0067—Three-dimensional shapes conical
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0003—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having an inflatable pocket filled with fluid, e.g. liquid or gas
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09008—Guide wires having a balloon
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09058—Basic structures of guide wires
- A61M2025/09075—Basic structures of guide wires having a core without a coil possibly combined with a sheath
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09125—Device for locking a guide wire in a fixed position with respect to the catheter or the human body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09175—Guide wires having specific characteristics at the distal tip
- A61M2025/09183—Guide wires having specific characteristics at the distal tip having tools at the distal tip
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2210/00—Anatomical parts of the body
- A61M2210/12—Blood circulatory system
Abstract
An embolism filter adapted to selectively stop an embolism filter along a length of guidewire, including a filter adapted to encircle a guidewire and at least one self-deploying stop attached to the filter and which selectively stops movement of said filter.
Description
- This application claims the benefit under 35 USC §119(e) of U.S. provisional application 60/400,801, filed on Aug. 5, 2002, the disclosure of which is incorporated herein by reference.
- The present invention relates to devices for filtering embolitic material from circulating blood.
- Embolitic material comprising calcium, intimal debris, pieces of an artheromatous plaque and/or thrombi, has the potential of migrating and causing distal tissue damage, for example, stroke and/or myocardial infarction. (See Topol, E. J. and Yadov, J. S., “Recognition of the Importance of Embolization in Athereosclerotic Vascular Disease”, Circulation 2000, 101:570.) Embolic material with the potential of distal tissue damage is often released during vascular interventional procedures, for example, stenting of an artheromatous region.
- In response to the risk posed by released emboli during vascular intervention procedures, a mesh filter mounted on a specially adapted guidewire may be introduced into a blood vessel to strain released embolitic material from the circulation, thereby reducing the risk of distal tissue damage. To deploy such a mesh filter, a specially designed guidewire, for example having a built-in stop, may be placed in the blood vessel so that the stop is just distal to the target area. A collapsed filter is advanced along the guidewire until it is prevented from further advancement by the stop and opened so that it catches debris released from the target area.
- Unfortunately, the specially designed guidewire is bulky and hard to manipulate due, in part, to the incorporated stop and accurate positioning of the filter is difficult once it has reached the guidewire stop. In addition, the use of a non-standard guidewire may require replacement or stocking of new catheterization sets.
- Tsugita et al. in U.S. Pat. No. 6,361,971 B1 and US Applications 2002/0095174 and 2002/0183782, the disclosure of which is incorporated hereby in its entirety by reference, demonstrate filters and locking mechanisms.
- An aspect of some embodiments of the invention relates to an embolism filter stop and method for its deployment, comprising a filter with one or more self-deploying stops attached thereto that stop the filter at substantially any desired location along a length of guidewire.
- According to an exemplary embodiment of the present invention, the filter with its self-deploying stops can be deployed on guide wires in a variety of lengths and/or a variety of diameters. Alternatively or additionally, different stop designs and/or materials may be used for specific guidewires with specific properties, for example a flexible and/or small gage wire that may be used in fetal surgery. It is a particular feature of some embodiments of the invention, that the filter can be deployed on a substantially smooth guide wire, with no projections (where the filter is deployed) and/or with a uniform diameter in such a section. However, the filter can also be deployed with non-standard guide wires, for example, with a stepped or tapered diameter or with stops, ignoring or utilizing these stops, depending on the filter geometry.
- In an exemplary embodiment, the at least one stop comprises is self-expanding, for example comprising a spring. Alternatively or additionally, the at least one self-expanding stop comprises a cushion made of, for example, a flexible rubber material. Additionally or alternatively, the at least one self-expanding stop comprises a fluid-filled flexible compartment containing compressed fluid, for example a gas that expands upon removal of a restrainer.
- In an exemplary embodiment, a restrainer prevents the one or more stops from prematurely contacting and locking to the guidewire. Upon reaching the target tissue, the restrainer is pulled free and the stop self-deploys, fixing the filter in place. Optionally, the at least one stop comprises at least two stops that are, for example, symmetrically disposed around said wire and/or apply symmetric and/or equivalent force around the wire. Alternatively or additionally, the stops provide equal amounts of motion (e.g., while expanding) on opposing sides of the guide wire and/or on axially spaced locations on the guidewire, so that the placement of the filter is parallel to the guide wire. in some embodiments, an intentionally skewed placement of the filter may be desirable.
- In an alternative embodiment of the invention, the stop is not self-deploying but is integral to and mechanically coupled to the filter and is activated other than by the guidewire. In one example, the stop is a deforming and/or expandable element, such as an inflatable balloon having an inflation port to which an inflation hose is attached. In an exemplary embodiment, the port self-seals following inflation of the balloon and removal of the hose. If the balloon is elastic, it can also be restrained after inflation.
- Optionally, the filter defines a front and rear boundary and the at least one stop is connected to at least one of said boundaries. In an exemplary embodiment, the at least one stop is substantially contained between said boundaries, for example, so the overall length of the filter is conserved, allowing the filter to be easily maneuvered in the vasculature. Alternatively or additionally, said at least one stop projects beyond one or more of said boundaries.
- An aspect of some embodiments of the invention relates to a filter that has some axial freedom of motion relative to a guidewire, after it is locked in place on a guidewire. In an exemplary embodiment of the invention, the filter deploys around a sleeve that travels along a guidewire, said, sleeve having one or more stops shiftably attached thereto. In an exemplary embodiment, the shiftable stops allow the open filter to remain stationary in relation to the vascular environment even if the guidewire is moved a small amount. In this manner, a shiftable stop limits movement of the open filter that may cause trauma to the surrounding tissue, during for example, positional adjustments of a guidewire.
- In an exemplary embodiment, the filter comprises one or more support members, for example struts that support the filter membrane and/or slide along the sleeve during deployment and/or collapse of the filter.
- In an exemplary embodiment, a sleeve capable of traveling along a guidewire, comprising one or more self-deploying stops, is used in conjunction with one or more devices deployed in the vasculature or in other hollow organs of the body, for example an arthroscopic fiber optic cable, brachytherapy device and/or a laser, using these devices as its guidewire.
- There is thus provided in accordance with an exemplary embodiment of the invention, an embolism filter adapted to selectively stop an embolism filter along a length of guidewire, said filter comprising:
- a) a filter adapted to encircle a guidewire; and
- b) at least one self-deploying stop attached to said filter and adapted to selectively stop movement of said filter. Optionally, said at least one stop comprises a spring. Optionally, said spring expands during deployment.
- Alternatively or additionally, at least a portion of said stop is removably attached to said filter.
- In an exemplary embodiment of the invention, said at least one stop comprises a cushion. Alternatively or additionally, said at least one stop comprises a chamber containing an expandable fluid. Optionally, said filter comprises a fluid release mechanism adapted to cause the release of said expandable fluid.
- In an exemplary embodiment of the invention, said at least one stop is adapted to be restrained from contacting said guidewire by at least one stop restrainer. Optionally, said at least one stop is adapted to self-deploy upon removal of said restrainer. Alternatively or additionally, said restrainer comprises a material that changes configuration in response to contact with blood tissue.
- In an exemplary embodiment of the invention, said at least one stop comprises at least one inflatable member.
- In an exemplary embodiment of the invention, said at least one stop comprises at least two stops. Optionally, said at least two stops are radially disposed around said wire. Alternatively or additionally, said at least two stops are adapted to apply substantially equivalent force to said wire.
- In an exemplary embodiment of the invention, said filter is adapted to collapse within a restrictive cavity. Alternatively or additionally, said filter is adapted to self-expand upon exiting a restrictive cavity. Alternatively or additionally, said restrictive cavity comprises a delivery sheath. Optionally, said delivery sheath is removably coupled to said filter.
- In an exemplary embodiment of the invention, at least one of said one or more stops are adapted to move a limited distance along said filter.
- In an exemplary embodiment of the invention, said filter comprises a sleeve surrounding said one or more stops. Optionally, said stops do not extend beyond at least one end of said sleeve. Alternatively or additionally, said filter is mounted on said sleeve and does not extend axially beyond said sleeve.
- There is also provided in accordance with an exemplary embodiment of the invention, a method for stopping motion of a filter along a guidewire comprising:
- a) positioning a guidewire in a blood vessel;
- b) advancing along said guidewire a filter having at least one stop attached thereto; and
- c) allowing said stop to self-deploy and engage said guidewire, thereby securing said filter along said guidewire. Optionally, the method comprises expanding said filter. Alternatively or additionally, the method comprises, collecting particulate matter in the filter. Optionally, the method comprises collapsing said filter with said collected particulate matter. Optionally, the method comprises removing said filter with said collected particulate matter from said blood vessel. Optionally, removing said filter comprises not removing said guidewire.
- There is also provided in accordance with an exemplary embodiment of the invention, a guidewire stop, comprising:
- a) a sleeve that slideably engages a guidewire; and
- b) at least one self-deploying stop attached to said sleeve that selectively stops movement of said sleeve along said guidewire. Optionally, the stop includes a vascular filter having front and rear boundaries wherein said sleeve is attached to at least one of said boundaries. Optionally, said sleeve is extends beyond at least one of said boundaries. Alternatively, said sleeve is substantially contained between said boundaries.
- There is also provide din accordance with an exemplary embodiment of the invention, an embolism filter adapted to selectively stop an embolism filter along a length of guidewire, said filter comprising:
- a) a filter adapted to encircle a guidewire; and
- b) at least one deformable stop attached to said filter and adapted to selectively stop movement of said filter. Optionally, said stop comprises an inflatable stop. Optionally, the filter comprises a removal sheath adapted to puncture said stop.
- Exemplary non-limiting embodiments of the invention are described in the following description, read with reference to the figures attached hereto. In the figures, identical and similar structures, elements or parts thereof that appear in more than one figure are generally labeled with the same or similar references in the figures in which they appear. Dimensions of components and features shown in the figures are chosen primarily for convenience and clarity of presentation and are not necessarily to scale. The attached figures are:
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FIGS. 1-3 are cross sectional schematic views showing the operation of an embolism filter and its self-deploying stops, in accordance with an exemplary embodiment of the invention; -
FIGS. 4-6 are, cross sectional schematic views of various embodiments of guidewire sleeves with stops, in accordance with an exemplary embodiment of the invention; -
FIG. 7 is a schematic view of a sleeve and guidewire stop in combination with a filter, in accordance with an exemplary embodiment of the invention; -
FIGS. 8A and 8B are schematic views of a shiftable filter stop, in accordance with an exemplary embodiment of the invention; -
FIG. 9 is a detailed cross sectional view of a filter during delivery in a blood vessel, in accordance with an exemplary embodiment of the invention; -
FIG. 10A is a detailed cross sectional view of a filter following deployment in a blood vessel, in accordance with an exemplary embodiment of the invention; -
FIG. 10B is a partial detailed cross sectional view of the filter shown inFIG. 10A , in accordance with an exemplary embodiment of the invention; -
FIG. 10C is a head on view of the filter ofFIG. 10A , in accordance with an exemplary embodiment of the invention; and -
FIG. 11 is a detailed cross sectional view of a filter during removal from a blood vessel, in accordance with an exemplary embodiment of the invention. - Filter with Spring Stops
-
FIG. 1 is a cross sectional view of afilter 100 contained within adelivery sheath 150, in accordance with an exemplary embodiment of the invention. In an exemplary embodiment,filter 100 comprisesstops guidewire 102 by arestrainer 132. During positioning offilter 100,optional stabilizers 152 that project from asheath wall 120 press againstfilter 100 to advancefilter 100 alongguidewire 102. -
Filter 100 and/or stops 180 and 182 may be designed in a variety of materials and shapes for example a range of guidewire diameters, for example a range of 1:1.5, 1:2 or 1:4 or any smaller, intermediate or larger ratio of diameters. Alternatively or additionally, in any specific design,filter 100 and/or stops 180 and 182 may be manufactured to encompass a guidewire of a specific diameter. Guidewire diameters for which filter 100 and/or stops 180 and 182 can be designed include, for example: - i) small gage flexible guidewires, for use in peripheral vasculature, for example having a diameter of 0.014, 0.018, 0.032 or 0.035 inches;
- ii) guidewires designed for coronary surgery, for example having a diameter of 0.014.
- iii) specially designed guidewires designed for coronary interventions and/or fetal surgery, having diameters smaller than 0.014, greater than 0.035 and/or having non-standard diameters between 0.014 and 0.035 inches.
- In an exemplary embodiment,
restrainer 132 has apassage 134 that rides alongwire 102 and permits movement offilter 100 distal to the target tissue location. - In an exemplary embodiment, a
front boundary 122 of delivery sheath may be tapered to facilitate easy movement through the vasculature. Additionally or alternatively,front boundary 122 may be curved in towardswire 102. Optionally,front boundary 122 comprises a flexible material so that it allowsfilter 100 to exit in spite of being unvaccinated. - In an exemplary embodiment,
front boundary 124 of asleeve wall 184 is tapered to ease advancement offilter 100 through the vasculature. Additionally or alternatively, arear boundary 126 is tapered to facilitate retreat offilter 100 through the vasculature. - Optionally, stops 180 and/or 182 are contained internal to
wall 184, for example near or atfront boundary 124 and/orrear boundary 126 offilter 100, so the overall length offilter 100 is conserved. Having a shorter profile associated with internally contained stops 180 and/or 182, may assistfilter 100 in maneuvering in the vasculature. Alternatively or additionally, stops 180 and/or 182, withinwall 184, project beyondfront boundary 124 and/orrear boundary 126 offilter 100. In an exemplary embodiment, stops 180 and/or 182 comprises springs, for example a spring steel, or resilient plastic. - Deployment of
stops restrainer 132 that is remotely controlled, for example using an RF signal to cause its displacement and/or dissolution. Alternatively, other methods of actuation ofstops - In
FIG. 2 ,delivery sheath 150 remains aroundfilter 100 andstabilizers 152 press againstfilter 100 whilerestrainer 132 is pulled away fromstops restrainer cable 130 to pull restrainer 132 in adirection 140. In an exemplary embodiment,restrainer 132 has a length of between 1-4 centimeters.Optionally restrainer 132 is less than 1 or 0.5 centimeter in length when used, for example, withsmall stops 180 and/or 182, designed for fetal and/or pediatric procedures. Optionally,restrainer 132 has a length of greater than 4 centimeters when used, for example, withstops 180 and/or 182, for example, that are 3 or 4 centimeters or more in length for use whenfilter 100 is larger, for example where large amounts of particulate matter is anticipated that cannot be contained by a smaller filter.Restrainer 132 is optionally flexible in bending, even if it is not compressible, for example it may be segmented into narrow rings that are interconnected by a soft material. - Optionally,
restrainer 132 is removed from contact withstops 180 and/or 182 by pullingrestrainer cable 130 so thatrestrainer 132 shifts approximately 1 centimeter with respect tostops 180 and/or 182. In pediatric and/or large vessel use, when smaller orlarger stops 180 and/or 182 are used, restrainer 132 may require less than 1 centimeter or greater than 1 centimeter of movement to allowstops 180 and/or 182 to expand. - With
restrainer 132 removed, stops 180 and 182 expand to contactguidewire 102 thereby fixingfilter 100 in place alongguidewire 102. Withfilter 100 fixed in place, stops 180 and 182 stabilizefilter 100 so thatsheath 150 can be pulled away fromfilter 100 as seen, for example, inFIG. 3 . - With
delivery sheath 150 removed fromfilter 100, aporous filter membrane 190 expands, for example as a result of blood flow pressure against it, to act as a filter, serving to strain particulate matter from the blood. Alternatively or additionally,filter 190 is made of resilient material that self-expands as it is freed ofdelivery sheath 150. - Optionally,
delivery sheath 150 is moved in adirection 142 againstfilter membrane 190, thereby causingfilter membrane 190 to collapse. Withmembrane 190 collapsed,filter 100,guide wire 102 andsheath 150 are removed from the blood vessel. Using a guidewire of uniform diameter and/or without projections to aid inpositioning filter 100, is potentially advantageous as any number of additional devices, for example stents, can be interchangeably used with anyguidewire 102 and anyfilter 100. Stents of a variety of diameters, for example, can be stocked separately ofguidewires 102 and/orfilters 100 of different diameters. This reduces inventory costs associated with packaging each diameter of stent in multiple packages, each package containing a different diameter and/or design ofguidewire 102 and/orfilter 100. - Sleeve with Inflatable Stops
- In an alternative stop mechanism to spring stops 180 and 182,
FIG. 4 shows a cross sectional view of asleeve stop 400 having anouter wall 402 from which one or more inflatable balloon stops 480 and 482 project. In an exemplary embodiment, sleeve is delivered to a target site and aninflation hose 484 connected to one or more inflatable balloon stops 480 and/or 482 is used to transfer fluid intoballoons 480 and/or 482 thereby causing their expansion.Balloons 480 and/or 482 expand until they contactwire 102, thereby preventing further movement ofsleeve stop 400. In an exemplary embodiment, ahose attachment port 486, self-seals following inflation ofballoons 480 and/or 482 and removal ofhose 484. - In an exemplary embodiment, fluid contained in
balloons sleeve stop 400 may be removed from the blood vessel without removingguide wire 102, for example using the following technique: - 1. A sheath having one or more sharp projections at its leading edge, for example, is fed along
guidewire 102 until its leading edge contacts balloons 480 and/or 482. - 2. The sheath is pressed against
sleeve stop 400 so that the one or more sharpprojections puncture balloon 480 and/or 482, allowing the biologically inert fluid within to escape harmlessly into the blood stream. - 3. A retrieval sheath is introduced along
guide wire 102 andsleeve stop 400 is pulled into the retrieval sheath, using methods well known in the art, for example. Optionally, the retrieval sheath includes one or more retractable hooks that engage and pull back the filter portion, so that it collapses. Alternatively or additionally, the retrieval sheath includes a cooling material, which when applied to a filter made of a suitable shape memory material causes the filter to change its shape to a collapsed filter. The retrieval sheath containingsleeve stop 400 is removed from the blood vessel whileguidewire 102 is optionally left in place. The retrieval sheath may be provided beforeballoons - Alternatively or additionally,
inflation hose 484 is coupled toballoons 480 and/or 482 so that removal ofhose 484 leaves an opening inballoons 480 and/or 482.Hose 484 is left in place following expansion ofballoons 480 and/or 482 until, for example,sleeve stop 400 requires removal. - To remove sleeve stop 400 without removing
guidewire 102, the following procedure is optionally followed: - 1.
Inflation hose 484 is pulled so that it disconnects from inflatable balloon stops 480 and/or 482. Disconnection ofhose 484 allows the biologically inert fluid to escape harmlessly into the blood stream and balloons 480 and/or 482 deflate. - 2.
Sleeve stop 400 is pulled into a retrieval sheath and removed as noted above in previous step 3. - Sleeve with Expanding Cushion Stops
- In another alternative stop mechanism to spring stops 180 and 182,
FIG. 5 shows a cross sectional view of asleeve stop 400.Sleeve stop 400 hasouter wall 402 from which one or more self-expanding cushions, 580 and/or 582 are restrained from contactingwire 102 byrestrainer 132. In an exemplary embodiment, aftersleeve stop 400 reaches its target area,restrainer 132 is pulled away fromsleeve 400 usingrestrainer cable 130, thereby allowing cushions 580 and/or 582 to deploy and fixsleeve 400 in place. These cushions may be formed, for example, out of silicone polymers. - Alternatively or additionally, cushions 580 and/or 582 comprise expanding absorbent materials that, for example, absorb intravascular fluid and expand.
Restrainer 132, for example, compresses cushions 580 and/or 582 so they are prevented from absorbing fluid until they are freed fromrestrainer 132. - With cushions 580 and/or 582 comprising fluid-absorbing embodiments,
restrainer 132, for example, may comprise a layer ofmaterials 544 and/or 546 that interfaces with cushions 580 and/or 582 to prevent fluid from being absorbed. Upon displacement ofmaterials 544 and/or 546, for example with removal ofrestrainer 132, fluid absorption by cushions 580 and/or 582 subsequently takes place. -
FIG. 6 is an alternative embodiment of self-deployingsleeve stop 400 havingouter wall 402 from which project one or moreflexible compartments 680 and/or 682 containing compressed gas. In an exemplary embodiment,restrainer 132 is removed fromflexible compartments 680 and/or 682, so that the compressed gas within expands, causingflexible compartments 680 and/or 682 to expand andcontact guidewire 102. - Optionally, compartments 680 and/or 682 contain
compressed gas canisters restrainer 132. Upon removal ofrestrainer 132, for example, the compressed gas breaks through aweak spot 694 incanister 690 and/or aweak spot 696 incanister 692, allowing compressed gas to escape and expandcompartments 680 and/or 682. - Alternatively or additionally, 694 and 696 comprise openings in
canisters compartments 680 and/or 682 compress againstopenings restrainer 132, walls ofcompartments 680 and/or 682 remove fromopenings compartments 680 and/or 682. - Membranous Filter with Guide Stop Sleeve
-
FIG. 7 is a sleeved guidewire stop andfilter 700, in accordance with an exemplary embodiment of the invention, comprisingouter wall 402 withstops - In an exemplary embodiment,
porous membrane filter 190 has one or more living (or other type)hinge attachments 720 toouter wall 402, allowingfilter 190 to pivot open or closed in relation towall 402, during expansion and/or collapse. The hinge attachment ofporous filter 190 to wall 402 may comprise a variety of materials, for example, different formulations of resilient plastics. Alternatively or additionally, attachment ofporous filter 190 to wall 402 may comprise alternative designs, for example, one or more hooks passing through one or more eyes. - In an exemplary embodiment,
porous membrane 190 has one ormore struts 710 and/or 712 attached to acircumferential ring 722.Struts 710 and/or 712 supportporous membrane 190 andcircumferential ring 722 slides alongouter wall 402 during deployment and/or collapse ofstruts 710 and/or 712. For example, as afilter surface 740 moves in adirection 732, strut 710 and/orcircumferential ring 722 move in adirection 730, so thatfilter 700 assumes the deployed configuration shown. - In an exemplary embodiment, movement of
strut 710 indirection 730 and/or movement offilter surface 740 indirection 732 is automatic when they exit fromsheath 150. Alternatively or additionally, an operator-controlled mechanism, for example, a membrane filter deployer cable 750 is pulled in adirection 752 so that struts 710 and/or 712 move radially outward fromguidewire 102 untilmembrane 190 is in the deployed position. - In an exemplary embodiment, following expansion,
filter 190 serves to trap particulate matter, for example, one or more of pieces of an artheromatous plaque, thrombi, and/or gas. Following completion of the procedure,filter 190 is collapsed and removed, along with the particulate matter, for example, withguide wire 102. - In an exemplary embodiment,
porous membrane 190 and/or struts 710 and/or 712 contact the inner surface ofblood vessel 864 to form a seal and/or substantially spanblood vessel 864 so that at least a substantial amount, if not all, blood passing throughblood vessel 864, is filtered bymembrane 190. - Blood vessel size may be from 2-8 millimeters in diameter, and even less than 2 millimeters or greater than 8 millimeters in certain areas and/or individuals. Optionally, to accommodate this range in blood vessels, different embodiments of
porous membrane 190 and/or struts 710 and/or 712 may exhibit different degrees of radial expansion or may be partially deployed. - For example, in
vessels 864 with a smaller diameter, struts 710 and/or 712 may deploy so they are not maximally expanded with respect toguidewire 102, while in larger blood vessels, struts 710 and/or 712, for example, may approach their maximal expansion configuration. - Filter with Shiftable Stops
-
FIG. 8A is afilter 800 withshiftable guidewire stop 180, mounted on ashift platform 810 andguidewire stop 182, mounted on ashift platform 812. Shiftable stops 180 and/or 182 shiftablysecure sleeve wall 184 in relation toguidewire 102. In this and other embodiments it should be noted thatplatforms guide wire 102. -
FIG. 8B showsfilter 800 remaining stationary relative toblood vessel 864, whileplatform 812 and guidewire 102 move a small amount in adirection 824. - The degree of allowed shifting may depend, for example, on an inner geometry of
wall 184, for example, if rails are provided for the platforms and/or if stops are provided for the platforms, for example at the ends ofwall 184. - In an exemplary embodiment,
shift platform 810 shifts in relation tosleeve wall 184, for example one centimeter indirection 824, or one centimeter indirection 820. Greater or smaller amounts of shifting may be allowed, for example, between 2 and 5 mm, or greater or smaller amounts.Filter 800 is optionally designed to shift in a symmetrical manner, once deployed. - Alternatively or additionally, filter 800 may be used in an environment where shifting in
direction 820 is anticipated to be different than shifting indirection 824. For example where multiple stents are being placed one after the other, filter 800 may need to shift more indirection 820 than indirection 824. Alternatively or additionally to axial shifting, rotational shifting may be allowed, for example by providing rotational freedom (optionally with one or more stops) betweenplatform 810 andsleeve 184. - In an exemplary embodiment, shiftable stops 180 and/or 182 are confined in their movement, for example, within a
rear sleeve boundary 830 and/or afront sleeve boundary 834. Changing the distance betweenboundaries stops wall 184. -
Optionally filter 800 may be designed so thatsleeve wall 184 has a greater excursion than plus or minus one centimeter in relation toplatforms sleeve wall 184 has a smaller excursion in relation toplatforms platforms sleeve wall 184. - Alternatively or additionally to free shifting,
platforms sleeve wall 184, for example to absorb shock caused by sudden movement of guidewire 102 (and then optionally realign the filter in accordance with the new guidewire position), or to encourage smaller amounts of shifting. - Referring back to
FIG. 7 , to show a potential advantage of using a shiftable filter, upon deployment ofshiftable filter 700,filter membrane 190, for example, contacts ablood vessel wall 864, for example, around its perimeter. Pressure onfilter 700 indirections 824 and/or 820, for example due to movement ofguidewire 102, may cause movement offilter 700, so thatfilter membrane 190 scrapesblood vessel wall 864, possibly causing damage to blood vessel. Alternatively, distortion of the filter may occur, which may also be undesirable. - By allowing movement of
shiftable filter 800 assleeve 184 moves in relation to shiftplatforms shiftable filter 800 remains stationary with respect toblood vessel wall 864 even when there is movement pressure indirections 820 and/or 824. By limiting movement ofshiftable filter 800 with respect toblood vessel wall 864, trauma to wall 864 is possibly reduced and/or eliminated. -
FIG. 9 is a detailed cross sectional view of afilter 900 and stops 180 and 182 during delivery in ablood vessel 864, in accordance with an exemplary embodiment of the invention. In an exemplary embodiment, stops 180 arid/or 182 are limited in movement by aforward limiter 932 and arear limiter 942.Stops 180 and/or 182, for example, are attached tolimiters Limiters 932 and/or 942 may be fixed towall 402, slideably attached towall 402 and/or slideably attached to wall 402 for example so thatlimiters 932 and/or 942 move only under a relatively large displacement force. - In an exemplary embodiment,
delivery sheath 150 has anopening 948 that allowsfilter 900 to be deployed on aguidewire 902 using a rapid exchange and/or a monorail technique. In a monorail technique, guidewire 902 does not require excursion along the length ofdelivery sheath 150, for example two meters or more. - In an exemplary embodiment, to facilitate rapid deployment,
sleeve 150, for example hascurved section 922 that curves towardguide wire 902.Curved section 922, for example, may be advantageous in that it aidssheath 150 in passing easily throughblood vessel 864 without scraping walls ofblood vessel 864. - Alternatively or additionally,
curved section 922 edges may be beveled along the front boundary. Beveling the edges ofcurved section 922 may be advantageous in that it aids in placement offilter 900 without causing trauma to surrounding tissue.Outer wall 402 optionally containscurved tip 920 to additionally aid in placement offilter 900 without causing tissue trauma.Section 922 and/ortip 920 optionally seal againstguidewire 902, to prevent blood flow between them. - In an exemplary embodiment,
filter 900 has acurved section 920 that allows movement offilter 900 againstblood vessel 864 without causing trauma during a rapid exchange technique. - In an exemplary embodiment, struts 910 are collapsed within
deployment sheath 150, along withfilter 190 that is attached tocircumferential ring 722. -
FIG. 10A is a detailed cross sectional view offilter 900 following expansion ofstops delivery sheath 150. Upon removal ofdelivery sheath 150, for example, struts 910 and/orfilter membrane 190 have expanded radially outward in accordance with an exemplary embodiment of the invention. - In an exemplary embodiment, rings 932 and 942 are fixed in place along
wall 402, while ring stops 180 and 182, for example, deform under pressure from restrainer 132 (FIG. 9 ). Deformation ofstops stops restrainer 132, stops 180 and 182 expand to a final state shown schematically inFIG. 10A . -
FIG. 10B is an alternative embodiment ofstops FIG. 10A .Filter 900 comprisesring 942 that is fixed in place alongwall 402 andring 932 that is slideably connected towall 402. In an exemplary embodiment, upon removal ofrestrainer 132, spring stops 180 and 182 change their profile. To accommodate this change in profile,ring 932 slides alongwall 402, forexample leaving gaps -
Porous membrane 190, for example, is made of materials having pores of 200 microns in diameter, though it could have pores of between 20 and 250 microns, depending upon anticipated type and size of debris. - In delicate fetal procedures, for example fetal hydrocephalic shunt placement, pore size may be below 20 microns, while in retrieval of embolitic material from the lungs pores may be above 250 microns in diameter.
- In an exemplary embodiment, porous membrane has an internal volume of 0.3 cubic centimeters or greater, for example within the area defined between
porous filter 190 andwall 402, allowingfilter 900 to trap significant amounts of particulate debris. Alternatively or additionally, porous membrane has an internal volume of 0.3 cubic centimeters or less, for example, when used in blood vessels of smaller size, and/or in procedures where less debris is generated. -
FIG. 10C is a detailed head on view of 900 filter ofFIG. 10A , in accordance with an exemplary embodiment of the invention, showingstops stops guidewire 902 is surrounded bystops -
FIG. 11 is a detailed cross sectional view offilter 900 during removal from blood vessel 846 following deployment of astent 1140, in accordance with an exemplary embodiment of the invention. -
Removal sheath 1110 is placed onguidewire 902, for example throughopening 1048, and moved alongguidewire 902, throughguide catheter 940 until its front boundary contacts strut 910. Assheath 1110 contacts strut 910, strut 910 moves radially towardguidewire 902 whilecircumferential ring 722 moves toward and/or pastcurved tip 920. - In an exemplary embodiment,
space 1124 maintains a volume suitable for transporting the particulate and/or gaseous debris during removal offilter 900 from blood vessel. Withfilter 900 collapsed and partially or totally contained withinsheath 150,filter 900 and/orsheath 150, and/orguidewire 902 are pulled throughstent 1140, and out of blood vessel 846.Filter 900 is optionally designed to resist deformity during removal so that it fully removes any particulate it captured during its deployment invessel 864. - In an exemplary embodiment,
filter 900 is deployed in and removed from a blood vessel in the following manner: - 1. An entry portal is made into an accessible blood vessel 846, for example the femoral artery.
- 2. A guide catheter and/or
dedicated sheath 940 is fed from the femoral artery to the target area. - 3.
Guide wire 902 is fed throughguide catheter 940 intoblood vessel 864 past, for example, an artheromatous plaque 916 (FIG. 9 ). - 4.
Sheath 150, containingfilter 900 in the collapsed state, is threaded ontoguidewire 902 and moved alongblood vessel 864 usingsheath 150 to push it forward. - 5. Upon reaching or passing the target site, restrainer 132 is removed so that stops 180 and/or 182 deploy to lock
filter 900 onguide wire 902. - 6.
Sheath 150 is removed fromfilter 900 andfilter 900 expands so thatmembrane 190 spans all or part of the cross sectional diameter ofblood vessel 864 andsheath 150 is pulled out of vessel 846, as seen inFIG. 10A . - 7. When
filter 900 is used in conjunction with a stenting procedure, for example, guide catheter and/ordedicated sheath 940 is fed overguidewire 902 until it reaches the target area andstent 1140 is deployed and anchored inblood vessel 864 while embolitic material is caught byopen filter 900 as seen inFIG. 10C , for example downstream ofstent 1140. - 8. As seen in
FIG. 11 , following completion of the procedure,removal sheath 1110 is optionally fed ontoguidewire 902 and pushed forward in blood vessel 846 until its front boundary contacts struts 910. - 9.
Sheath 1110 is pressed againststruts 910 to cause them to collapse radially andsheath 1110 along withfilter 900 andguide wire 902 are removed fromblood vessel 864. - Referring to
FIG. 9 ,rapid exchange guidewire 902 used in a rapid exchange technique, for example, may be flexible anywhere along its length, for example at a flexedsection 952 asfilter 900 moves alongguidewire 902. - To secure
filter 100 in place, stops 180 and 182 are designed to each deliver, for example, 100 to 500 grams of force againstguide wire 102. However, stops 180 and 182 may be designed to deliver a force less than 100 grams for used in special situations, for example where the displacement force is extremely low, for example in peripheral veins. Alternatively or additionally, stops 180 and 182 may be designed to deliver a force greater than 500 grams, for example, in patients with high blood flow speed, where released emboli are likely to have large mass and/or when a more slippery guide wire is anticipated. Alternatively or additionally, a force greater than 500 grams may be required whenguidewire 102 comprises smooth materials that do not provide a friction finish to which stops 180 and 182 secure under lower pressure. -
Stops whole wall 184 including the stops may be cut (e.g., using a laser or other means known in the at) from a sheet of steel or other biocompatible metal, such as titanium, or a nickel titanium alloys. Depending on the implementation, it may be desirable that the filter, body and/or stops be formed of plastic, elastic and/or super elastic materials. -
Stops 480 and 482 (FIG. 4 ), 580 and 582 (FIGS. 5 ), and 680 and 682 (FIG. 6 ), may be, for example, manufactured from surgical grade polyethylene, nylon and/or terephthalate and/or other flexible, surgical-grade materials suitable for use in the vasculature. - Two stops, 180 and 182 are shown, but filter 100 may comprise less or more stops, for example, depending upon the diameter of
guidewire 102, the material from which guidewire 102 is manufactured and/or the design offilter 100. - In an exemplary embodiment, stops 180 and 182 are radially disposed around
wire 102, for example so they apply equivalent radial pressure, that will not cause deformation to filter 100. Applying even pressure allowsstops boundaries 122 and 124 (FIGS. 1-3 ) without distorting the architecture offilter 100 and/orwall 184. Optionally, two or more axially displaced stops (relative to the guidewire) or sets of stops may be used. - In an exemplary embodiment of the present invention, sleeve stop 400 (
FIGS. 4-6 ) is used in conjunction with any number of devices that are delivered into the vasculature. Such devices, for example, may include ablation lasers and/or catheter balloons that are used to ablate intravascular plaques, stents for restoring and/or maintaining patency of blood vessels. - Alternatively or additionally, such devices may include a variety of instrumentation eluding an arthroscopic tip, laparoscopic tools, and/or artheromatous shavers that are often used in vascular procedures.
- While the invention has been described with respect to a limited number of embodiments, it will be appreciated that many variations, modifications and other applications of the invention may be made. In particular, features from one embodiment may be combined with features of another embodiment, in accordance with some embodiments of the present invention.
- A variety of values have been utilized to describe the invention including, diameters, lengths and types of materials for the various filters, sleeves and/or stops. Although a variety of values and/or materials have been provided, it should be understood that these could vary even further based upon a variety of engineering principles, materials, intended use and designs incorporated into the invention.
- It should be appreciated that different features may be combined in different ways. In particular, stop sleeve may be utilized with other instruments and/or devices used in the vasculature and may be modified in shape, size and/or materials to be ergonomically and engineeringly compatible with the specific usage.
- Hence, not all the features, shapes and/or dimensions shown above in a particular embodiment may be necessary in every similar exemplary embodiment of the invention. The particular geometric forms and measurements used to illustrate the invention should not be considered limiting the invention in its broadest aspect to only those forms. Although some limitations are described only as method or apparatus limitations, the scope of the invention also includes apparatus designed to carry out the methods of using the apparatus.
- Also within the scope of the invention are surgical kits, for example, kits that include sets of delivery systems, guidewires, filters and/or self-deploying stops. Optionally, such kits also include instructions for use. Measurements are provided to serve only as exemplary measurements for particular cases, the exact measurements applied will vary depending on the application. When used in the disclosure and/or claims, the terms “comprises”, “comprising”, “includes”, “including” or the like mean “including but not limited to”.
- A person skilled in the art will appreciate that the present invention is not limited by what has thus far been described. Rather, the scope of the present invention is limited only by the following claims.
Claims (11)
1. An actuatable guidewire stop disposed on a guidewire, said guidewire stop adapted to selectively stop an intravascular device from longitudinally moving relative to a guidewire, comprising:
a sleeve slideably disposed about the guidewire;
the actuatable guidewire stop secured within an interior space of the sleeve and comprising one or more radially expandable balloons; and
an inflation hose connected to the one or more radially expandable balloons for transfer of a fluid into the balloon or balloons, wherein the transfer of fluid urges the one or more radially expandable balloons against the guidewire to prevent longitudinal movement of the sleeve along the guidewire.
2. The guidewire stop of claim 1 , wherein the fluid is biologically inert.
3. The guidewire stop of claim 1 , wherein the inflation hose is connected to the one or more radially expandable balloons at one or more hose attachment ports which self-seal upon disconnection of the inflation hose from the one or more hose attachment ports.
4. The guidewire stop of claim 1 , wherein the inflation hose is connected to the one or more radially expandable balloons at one or more hose attachment ports and the balloon or balloons deflate upon disconnection of the inflation hose from the one or more hose attachment ports.
5. The guidewire stop of claim 3 , further comprising a sheath having a leading edge with one or more sharp projections, with the sheath advancing inside the sleeve toward the balloon or balloons, wherein the balloon or balloons deflate upon puncture by the one or more sharp projections.
6. A method for selectively stopping an actuatable guidewire stop having one or more radially expandable balloons at a longitudinal position of a guidewire, comprising the steps of:
advancing the actuatable guidewire stop along the guidewire; and
inflating the one or more balloons to urge the one or more radially expandable balloons against the guidewire to prevent longitudinal movement of the sleeve along the guidewire.
7. The method of claim 6 , wherein the one or more radially expandable balloons are surrounded by a sleeve.
8. The method of claim 6 , wherein the one or more radially expandable balloons are inflated by transfer of a fluid.
9. The method of claim 6 , further comprising the step of detaching the guidewire stop from the guidewire by deflating the one or more balloons.
10. A method for selectively stopping an intravascular device from longitudinally moving relative to a guidewire, comprising the steps of:
advancing an actuatable guidewire stop along the guidewire;
removing a restrainer disposed between the actuatable guidewire stop and the guidewire, thereby urging the actuatable stop against the guidewire to prevent longitudinal movement of the guidewire stop relative to the guidewire.
11. The method of claim 10 , wherein the restrainer is removed through displacement or dissolution of the restrainer.
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US14/230,752 US20140343592A1 (en) | 2002-08-05 | 2014-03-31 | Embolism filter with self-deployable guidewire stop |
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US14/230,752 US20140343592A1 (en) | 2002-08-05 | 2014-03-31 | Embolism filter with self-deployable guidewire stop |
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US6902572B2 (en) | 2003-04-02 | 2005-06-07 | Scimed Life Systems, Inc. | Anchoring mechanisms for intravascular devices |
-
2003
- 2003-02-25 AU AU2003209629A patent/AU2003209629A1/en not_active Abandoned
- 2003-02-25 US US10/523,967 patent/US7479151B2/en active Active
- 2003-02-25 WO PCT/IL2003/000144 patent/WO2004012628A1/en not_active Application Discontinuation
-
2009
- 2009-01-16 US US12/354,989 patent/US8684917B2/en not_active Expired - Lifetime
-
2014
- 2014-03-31 US US14/230,752 patent/US20140343592A1/en not_active Abandoned
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US4395806A (en) * | 1980-05-08 | 1983-08-02 | Sorenson Research Co., Inc. | Method of manufacturing a detachable balloon catheter assembly |
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US20020032486A1 (en) * | 2000-06-30 | 2002-03-14 | Argomed Ltd. | Prostatic stent with localized tissue engaging anchoring means and methods for inhibiting obstruction of the prostatic urethra |
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Cited By (1)
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WO2021061963A1 (en) * | 2019-09-24 | 2021-04-01 | Boston Scientific Scimed, Inc. | Wedge-lock sheath retention mechanism |
Also Published As
Publication number | Publication date |
---|---|
US20090149806A1 (en) | 2009-06-11 |
US20060111689A1 (en) | 2006-05-25 |
AU2003209629A1 (en) | 2004-02-23 |
WO2004012628A1 (en) | 2004-02-12 |
US8684917B2 (en) | 2014-04-01 |
US7479151B2 (en) | 2009-01-20 |
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Legal Events
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |