Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS20050267517 A1
Publication typeApplication
Application numberUS 11/184,644
Publication dateDec 1, 2005
Filing dateJul 19, 2005
Priority dateJan 10, 2002
Also published asCA2473103A1, EP1489991A2, US6932830, US20030130681, US20130345741, WO2003059204A2, WO2003059204A3
Publication number11184644, 184644, US 2005/0267517 A1, US 2005/267517 A1, US 20050267517 A1, US 20050267517A1, US 2005267517 A1, US 2005267517A1, US-A1-20050267517, US-A1-2005267517, US2005/0267517A1, US2005/267517A1, US20050267517 A1, US20050267517A1, US2005267517 A1, US2005267517A1
InventorsMark Ungs
Original AssigneeUngs Mark T
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Disc shaped filter
US 20050267517 A1
Distal protection filter and method of using the same. A distal protection filter may be coupled to an elongate shaft. The filter includes a filter material coupled to a filter frame. The shape of the filter may be generally cylindrical or disc shaped. The filter material may capture embolic debris generated during an intravascular intervention.
Previous page
Next page
1. An intravascular filter apparatus, comprising:
an elongate shaft having a distal end;
a generally cylindrical filter coupled to the shaft near the distal end, the filter having a length and a diameter; and
wherein the diameter of the filter is larger than the length.
  • [0001]
    This application is a continuation application of U.S. application Ser. No. 10/044,354, filed Jan. 10, 2002.
  • [0002]
    1. Field of the Invention
  • [0003]
    The present invention pertains to filtering devices. More particularly, the present invention pertains to devices and methods for filtering embolic debris from a blood vessel.
  • [0004]
    2. Description of the Related Art
  • [0005]
    Occluded, stenotic, or narrowed blood vessels may be treated with a number of relatively non-invasive medical procedures. For example, occlusions of blood vessels near the heart may be treated by percutaneous transluminal angioplasty (PTA), percutaneous transluminal coronary angioplasty (PTCA), atherectomy, etc. Similarly, a number of occlusions may occur in other blood vessels located a distance away from the heart. For example, an occlusion may occur within the renal artery between the abdominal aorta and the kidney. Because this vascular region is relatively short in length, an appropriate intervention may necessitate design modifications of current intravascular devices.
  • [0006]
    When treating occluded or stenotic blood vessels, embolic debris can be separated from the wall of the blood vessel. This debris could block other vascular regions including the renal, neural, and pulmonary vasculature or cause damage to tissue and/or body organs. In order to filter this debris, a number of devices, termed distal protection devices, have been developed.
  • [0007]
    The present invention pertains to distal protection filter devices. A distal protection filter may be coupled to an elongate shaft. The filter may be generally cylindrical or disc shaped and has a diameter and a length. The length is relatively small and may be smaller than the diameter. The filter may be used to capture embolic debris generated by an intravascular intervention. Aspiration means may be included to aspirate the embolic debris from the filter.
  • [0008]
    The filter may shift between a generally collapsed configuration and a generally expanded configuration by a number of methods. For example, an outer sheath may be disposed over the shaft and filter such that movement of the sheath relative to the shaft shifts the configuration of the filter. Alternatively, an expansion member may be actuated to shift the filter.
  • [0009]
    FIG. 1 is a cross sectional view of a distal protection filter;
  • [0010]
    FIG. 2 is a partial cross sectional view of depicting an alternate means for shifting the filter between the expanded and the collapsed configuration; and
  • [0011]
    FIG. 3 is a partial cross sectional view of the filter in FIG. 2 in the expanded configuration.
  • [0012]
    The following description should be read with reference to the drawings wherein like reference numerals indicate like elements throughout the several views. The detailed description and drawings illustrate example embodiments of the claimed invention.
  • [0013]
    A number of diagnostic and therapeutic interventions may result in the release of intravascular embolic debris. Several filtering devices have been developed to capture and/or remove this debris. However, some procedures and intravascular locations are not readily accessible to traditional filters. FIG. 1 is a cross sectional plan overview of a disc-shaped distal protection filter device 10. Filter device 10 includes a filter 11 attached to an elongate shaft 12. The design of filter device 10 permits filtering at intravascular locations that might otherwise not be readily accessible by traditional filters.
  • [0014]
    Shaft 12 may comprise a guidewire or intravascular catheter, similar to any number of those known in the art or as detailed below. A distal spring tip 16 may be disposed at a distal end 18 of shaft 12. Sheath 14 may be generally polymeric and is adapted and configured to be advanced through the vasculature to an area of interest. Once positioned, sheath 14 may be withdrawn proximally to deliver filter 11.
  • [0015]
    Filter 11 includes a filter material 20 coupled to a filter frame 22. Filter material 20 may be comprised of a polyurethane sheet and include at least one opening that may be, for example, formed by known laser techniques. The holes or openings are sized to allow blood flow therethrough but restrict flow of debris or emboli floating in the body lumen or cavity.
  • [0016]
    Filter 11 operates between a closed collapsed profile and an open radially-expanded deployed profile for collecting debris in a body lumen. Frame 22 may be self-expanding or otherwise biased to be oriented in the expanded configuration so that withdrawing sheath 14 allows filter 11 to shift to the expanded configuration. A number of methods may be used to shift filter 11 from the expanded configuration to the collapsed configuration. For example, filter 11 may include a plurality of longitudinally-extending struts 24 that extend between frame 20 to shaft 12. It can be appreciated that a number of methods for shifting filter 11 between the collapsed and expanded configuration can be used without departing from the spirit of the invention.
  • [0017]
    Filter 11 is designed to be disc shaped and/or cylindrical. The cylindrical shape of filter 11 can be understood to have a diameter D and a length L. Diameter D may generally be larger than length L such that filter 11 has a shape that differs from typical conically shaped filters. This characteristic of having a relatively short or thin length may be described as having a “short landing zone” to those in the art. Having a short landing zone can advantageously permit filter 11 to be used at intravascular locations that are relatively short and would otherwise be inaccessible to traditional filters. For example, the length of a portion of the renal artery between the abdominal aorta and the kidney is relatively short. Diagnosis or other interventions at the junction of the renal artery and the kidney would not easily be accomplished by using conically shaped filter because the filter may extend into the kidney, possibly causing damage to the kidney. Because of the shape of filter 11, this location is accessible for filtering by filter 11. A number of additional intravascular locations may similarly benefit from the shape of filter 11.
  • [0018]
    The dimensions of filter 11 may include diameter D being about 0.10 to 0.30 inches or less and length L may be about 0.01 to 0.15 inches or less. These dimensions are meant to be approximations and provided for illustration purposes. The dimensions may be altered for any one of multiple embodiments.
  • [0019]
    Shaft 12 may be generally tubular so as to define an aspiration lumen 26 extending therethrough. Aspiration may be important because the thin length of filter 11 may cause filter material 20 to become filled to its capacity with embolic material. Aspiration lumen 26 is connected proximally to a vacuum source and is used to aspirate embolic debris collected on filter material 20.
  • [0020]
    In use, filter 11 may be contained within sheath 14 and advanced within a blood vessel 28 to an area proximate a lesion 30. Blood vessel 28 may, for example, be the renal artery between the abdominal aorta and the kidney. Once positioned, sheath 14 may be withdrawn from filter 11, permitting filter 11 to shift to the expanded configuration. A therapeutic or diagnostic catheter may be advanced to lesion 30 (i.e., over shaft 12 or sheath 14). Embolic debris released by the intervention is captured by filter material 20. Aspiration lumen 26 may be used to aspirate the debris from filter material 20.
  • [0021]
    FIG. 2 is a partial cross section of an alternate filter device 110 that is the same in form and function as device 10 except that filter device 110 includes alternative means for shifting filter 111 between the expanded and the collapsed configuration. Filter 111 may be expanded by actuating a coiled expansion member 132.
  • [0022]
    Expansion member 132 may include a generally straight proximal portion 134 extending to the proximal end of shaft 12, and a coiled distal portion 136. Distal portion 136 is coupled to filter 111 such that force applied to proximal portion 136 in the distal direction exerts force onto filter 111 in the distal direction and shifts filter 111 distally. Distally shifting filter 111 results in filter 111 shifting to the expanded configuration.
  • [0023]
    Proximal portion 134 may be connected to a manifold, actuating handle, etc. that permits expansion member 132 to be moved relative to shaft 12 by a clinician. According to this embodiment, expansion member 132 is slidably disposed within shaft 12 and may be moved in either a proximal or distal direction. This may permit the use of filter 111 without the need for a separate delivery or retrieval catheter, which may simplify use and/or overall profile of the device. Moreover, bi-directional motion of expansion member 132 may alloy filter 111 to be positioned in one location, expanded by distal motion of expansion member 132, filter embolic debris, collapsed by proximal motion of expansion member 132, and moved to another location for use.
  • [0024]
    To expand filter 111, distal portion 136 is generally tightly coiled within shaft 12 such that when it is allowed to advance distally out of shaft 12, distal portion 136 expands to expand filter 111 as shown in FIG. 3. It may be beneficial to construct expansion member 132 (or at least distal portion 136) of a shape-memory or superelastic alloy such as nickel-titanium alloy. According to this embodiment, the size and/or shape of distal portion 136 may be predetermined by heat setting distal portion 136 to the desired diameter and length. Multiple embodiments of the invention incorporate alternate sizes and shapes of expansion member 132. For example, expansion member 132 may be heat set to expand so filter 111 has a larger diameter for one intervention and a smaller diameter for another.
  • [0025]
    Expansion member 132 may be completely or partially comprised of a radiopaque material. A radiopaque material is understood to be capable of producing a relatively bright image on a fluoroscopy screen or another imaging technique during a medical procedure. This relatively bright image aids the user of filter 111 in determining its location. Radiopaque materials may include gold, platinum, palladium, tantalum, tungsten alloy, and plastic material loaded with a radiopaque filler. Filter 111 and/or shaft 12 may further comprise additional radiopaque markers, similar to those known in the art.
  • [0026]
    It should be understood that this disclosure is, in many respects, only illustrative. Changes may be made in details, particularly in matters of shape, size, and arrangement of steps without exceeding the scope of the invention. The invention's scope is, of course, defined in the language in which the appended claims are expressed.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3472230 *Dec 19, 1966Oct 14, 1969Fogarty T JUmbrella catheter
US3952747 *Mar 28, 1974Apr 27, 1976Kimmell Jr Garman OFilter and filter insertion instrument
US3996938 *Jul 10, 1975Dec 14, 1976Clark Iii William TExpanding mesh catheter
US4425908 *Oct 22, 1981Jan 17, 1984Beth Israel HospitalBlood clot filter
US4643184 *Apr 17, 1984Feb 17, 1987Mobin Uddin KaziEmbolus trap
US4662885 *Sep 3, 1985May 5, 1987Becton, Dickinson And CompanyPercutaneously deliverable intravascular filter prosthesis
US4706671 *May 2, 1985Nov 17, 1987Weinrib Harry PCatheter with coiled tip
US4723549 *Sep 18, 1986Feb 9, 1988Wholey Mark HMethod and apparatus for dilating blood vessels
US4790812 *Nov 15, 1985Dec 13, 1988Hawkins Jr Irvin FApparatus and method for removing a target object from a body passsageway
US4790813 *May 30, 1986Dec 13, 1988Intravascular Surgical Instruments, Inc.Method and apparatus for surgically removing remote deposits
US4794928 *Jun 10, 1987Jan 3, 1989Kletschka Harold DAngioplasty device and method of using the same
US4857045 *Oct 23, 1987Aug 15, 1989Schneider (Usa) Inc., A Pfizer CompanyAtherectomy catheter
US4873978 *Dec 4, 1987Oct 17, 1989Robert GinsburgDevice and method for emboli retrieval
US4886061 *Feb 9, 1988Dec 12, 1989Medinnovations, Inc.Expandable pullback atherectomy catheter system
US4969891 *Apr 13, 1990Nov 13, 1990Gewertz Bruce LRemovable vascular filter
US5011488 *Aug 20, 1990Apr 30, 1991Robert GinsburgThrombus extraction system
US5071407 *Apr 12, 1990Dec 10, 1991Schneider (U.S.A.) Inc.Radially expandable fixation member
US5133733 *Oct 31, 1990Jul 28, 1992William Cook Europe A/SCollapsible filter for introduction in a blood vessel of a patient
US5160342 *Dec 30, 1991Nov 3, 1992Evi Corp.Endovascular filter and method for use thereof
US5192286 *Jul 26, 1991Mar 9, 1993Regents Of The University Of CaliforniaMethod and device for retrieving materials from body lumens
US5324304 *Jun 18, 1992Jun 28, 1994William Cook Europe A/SIntroduction catheter set for a collapsible self-expandable implant
US5329942 *Mar 20, 1992Jul 19, 1994Cook, IncorporatedMethod for filtering blood in a blood vessel of a patient
US5370657 *Mar 26, 1993Dec 6, 1994Scimed Life Systems, Inc.Recoverable thrombosis filter
US5415630 *Mar 9, 1994May 16, 1995Gory; PierreMethod for removably implanting a blood filter in a vein of the human body
US5419774 *Jul 13, 1993May 30, 1995Scimed Life Systems, Inc.Thrombus extraction device
US5462529 *Sep 29, 1993Oct 31, 1995Technology Development CenterAdjustable treatment chamber catheter
US5536242 *Oct 25, 1995Jul 16, 1996Scimed Life Systems, Inc.Intravascular device utilizing fluid to extract occlusive material
US5549626 *Dec 23, 1994Aug 27, 1996New York Society For The Ruptured And Crippled Maintaining The Hospital For Special SurgeryVena caval filter
US5662671 *Jul 17, 1996Sep 2, 1997Embol-X, Inc.Atherectomy device having trapping and excising means for removal of plaque from the aorta and other arteries
US5669933 *Jul 17, 1996Sep 23, 1997Nitinol Medical Technologies, Inc.Removable embolus blood clot filter
US5769816 *Apr 30, 1996Jun 23, 1998Embol-X, Inc.Cannula with associated filter
US5779716 *Oct 6, 1995Jul 14, 1998Metamorphic Surgical Devices, Inc.Device for removing solid objects from body canals, cavities and organs
US5800457 *Mar 5, 1997Sep 1, 1998Gelbfish; Gary A.Intravascular filter and associated methodology
US5800525 *Jun 4, 1997Sep 1, 1998Vascular Science, Inc.Blood filter
US5807398 *Apr 28, 1995Sep 15, 1998Shaknovich; AlexanderShuttle stent delivery catheter
US5814064 *Mar 6, 1997Sep 29, 1998Scimed Life Systems, Inc.Distal protection device
US5833650 *Jun 5, 1995Nov 10, 1998Percusurge, Inc.Catheter apparatus and method for treating occluded vessels
US5848964 *Jun 6, 1997Dec 15, 1998Samuels; Shaun Lawrence WilkieTemporary inflatable filter device and method of use
US5911734 *May 8, 1997Jun 15, 1999Embol-X, Inc.Percutaneous catheter and guidewire having filter and medical device deployment capabilities
US5951589 *Jul 31, 1998Sep 14, 1999Biointerventional CorporationExpansile device for use in blood vessels and tracts in the body and tension application device for use therewith and method
US6066149 *Sep 30, 1997May 23, 2000Target Therapeutics, Inc.Mechanical clot treatment device with distal filter
US6066158 *Jul 25, 1996May 23, 2000Target Therapeutics, Inc.Mechanical clot encasing and removal wire
US6096053 *May 22, 1998Aug 1, 2000Scimed Life Systems, Inc.Medical retrieval basket
US6142987 *Aug 3, 1999Nov 7, 2000Scimed Life Systems, Inc.Guided filter with support wire and methods of use
US6152946 *Mar 5, 1998Nov 28, 2000Scimed Life Systems, Inc.Distal protection device and method
US6168579 *Aug 4, 1999Jan 2, 2001Scimed Life Systems, Inc.Filter flush system and methods of use
US6171327 *Feb 24, 1999Jan 9, 2001Scimed Life Systems, Inc.Intravascular filter and method
US6179861 *Dec 23, 1999Jan 30, 2001Incept LlcVascular device having one or more articulation regions and methods of use
US6203561 *Dec 23, 1999Mar 20, 2001Incept LlcIntegrated vascular device having thrombectomy element and vascular filter and methods of use
US6206868 *Jun 14, 1999Mar 27, 2001Arteria Medical Science, Inc.Protective device and method against embolization during treatment of carotid artery disease
US6221006 *Feb 9, 1999Apr 24, 2001Artemis Medical Inc.Entrapping apparatus and method for use
US6277139 *Mar 31, 2000Aug 21, 2001Scion Cardio-Vascular, Inc.Vascular protection and embolic material retriever
US6425909 *Nov 4, 1999Jul 30, 2002Concentric Medical, Inc.Methods and devices for filtering fluid flow through a body structure
US6562058 *Mar 2, 2001May 13, 2003Jacques SeguinIntravascular filter system
US6932830 *Jan 10, 2002Aug 23, 2005Scimed Life Systems, Inc.Disc shaped filter
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7662166Feb 13, 2006Feb 16, 2010Advanced Cardiocascular Systems, Inc.Sheathless embolic protection system
US7678129Mar 19, 2004Mar 16, 2010Advanced Cardiovascular Systems, Inc.Locking component for an embolic filter assembly
US7678131Jan 19, 2007Mar 16, 2010Advanced Cardiovascular Systems, Inc.Single-wire expandable cages for embolic filtering devices
US7780694Oct 6, 2003Aug 24, 2010Advanced Cardiovascular Systems, Inc.Intravascular device and system
US7815660Feb 4, 2008Oct 19, 2010Advanced Cardivascular Systems, Inc.Guide wire with embolic filtering attachment
US7842064Aug 1, 2006Nov 30, 2010Advanced Cardiovascular Systems, Inc.Hinged short cage for an embolic protection device
US7867273Jun 27, 2007Jan 11, 2011Abbott LaboratoriesEndoprostheses for peripheral arteries and other body vessels
US7879065Jan 26, 2007Feb 1, 2011Advanced Cardiovascular Systems, Inc.Locking component for an embolic filter assembly
US7892251Nov 12, 2003Feb 22, 2011Advanced Cardiovascular Systems, Inc.Component for delivering and locking a medical device to a guide wire
US7918820Sep 11, 2009Apr 5, 2011Advanced Cardiovascular Systems, Inc.Device for, and method of, blocking emboli in vessels such as blood arteries
US7931666Jan 18, 2010Apr 26, 2011Advanced Cardiovascular Systems, Inc.Sheathless embolic protection system
US7959646Jun 26, 2007Jun 14, 2011Abbott Cardiovascular Systems Inc.Filter device for embolic protection systems
US7959647Dec 6, 2007Jun 14, 2011Abbott Cardiovascular Systems Inc.Self furling umbrella frame for carotid filter
US7972356Jun 25, 2007Jul 5, 2011Abbott Cardiovascular Systems, Inc.Flexible and conformable embolic filtering devices
US7976560Jan 17, 2007Jul 12, 2011Abbott Cardiovascular Systems Inc.Embolic filtering devices
US8016854Feb 4, 2008Sep 13, 2011Abbott Cardiovascular Systems Inc.Variable thickness embolic filtering devices and methods of manufacturing the same
US8029530Oct 13, 2010Oct 4, 2011Abbott Cardiovascular Systems Inc.Guide wire with embolic filtering attachment
US8137377Apr 29, 2008Mar 20, 2012Abbott LaboratoriesEmbolic basket
US8142442Apr 29, 2008Mar 27, 2012Abbott LaboratoriesSnare
US8177791Apr 15, 2009May 15, 2012Abbott Cardiovascular Systems Inc.Embolic protection guide wire
US8216209May 31, 2007Jul 10, 2012Abbott Cardiovascular Systems Inc.Method and apparatus for delivering an agent to a kidney
US8262689Sep 28, 2001Sep 11, 2012Advanced Cardiovascular Systems, Inc.Embolic filtering devices
US8308753Feb 25, 2010Nov 13, 2012Advanced Cardiovascular Systems, Inc.Locking component for an embolic filter assembly
US8591540Sep 29, 2003Nov 26, 2013Abbott Cardiovascular Systems Inc.Embolic filtering devices
US8845583Jan 10, 2007Sep 30, 2014Abbott Cardiovascular Systems Inc.Embolic protection devices
US9259305Mar 31, 2005Feb 16, 2016Abbott Cardiovascular Systems Inc.Guide wire locking mechanism for rapid exchange and other catheter systems
U.S. Classification606/200
International ClassificationA61B17/22, A61F2/01, A61M25/00, A61B17/00
Cooperative ClassificationA61F2002/018, A61F2230/0006, A61F2230/0067, A61F2230/0078, A61F2/01, A61F2/013
European ClassificationA61F2/01D
Legal Events
Nov 6, 2006ASAssignment
Effective date: 20050101
Effective date: 20050101