US20090275885A1 - Guide wire extension for shape memory polymer occlusion removal devices - Google Patents
Guide wire extension for shape memory polymer occlusion removal devices Download PDFInfo
- Publication number
- US20090275885A1 US20090275885A1 US11/238,018 US23801805A US2009275885A1 US 20090275885 A1 US20090275885 A1 US 20090275885A1 US 23801805 A US23801805 A US 23801805A US 2009275885 A1 US2009275885 A1 US 2009275885A1
- Authority
- US
- United States
- Prior art keywords
- shape memory
- vessel
- memory polymer
- transport vehicle
- mechanical actuator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
-
- 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
- A61M25/0905—Guide wires extendable, e.g. mechanisms for extension
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
- A61B2017/2217—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions single wire changing shape to a gripping configuration
-
- 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
- A61M2025/09133—Guide wires having specific material compositions or coatings; Materials with specific mechanical behaviours, e.g. stiffness, strength to transmit torque
- A61M2025/09141—Guide wires having specific material compositions or coatings; Materials with specific mechanical behaviours, e.g. stiffness, strength to transmit torque made of shape memory alloys which take a particular shape at a certain temperature
-
- 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
Abstract
Description
- The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-48 between the United States Department of Energy and the University of California for the operation of Lawrence Livermore National Laboratory.
- 1. Field of Endeavor
- The present invention relates to medical devices and more particularly to a shape memory polymer medical device.
- 2. State of Technology
- United States Patent Application No. 2002/0095169 by Duncan Maitland et al published Jul. 18, 2002 for a shape memory polymer actuator and catheter provides the following state of technology information, “A catheter with a shape memory material is transported to the site of the matter to be removed. The shape memory material is passed through or around the matter. Heat is utilized to activate the shape memory material and expand the shape memory material. By withdrawing the catheter and the shape memory material through said vessel the matter is carried from the vessel.”
- United States Patent Application No. 2004/0133231 by Duncan Maitland et al published Jul. 8, 2004 for a shape memory polymer actuator and catheter provides the following state of technology information, “The system uses heat to activate a shape memory material. The shape memory material will change shape when heated above a transition temperature. The shape memory material is adapted to move from a first shape to a second shape where it can perform a desired function. In one embodiment of the present invention a method of removing matter from a vessel is described. A catheter with a shape memory material is transported to the site of the matter to be removed. The shape memory material is passed through or around the matter. Heat is utilized to activate the shape memory material and expand the shape memory material. By withdrawing the catheter and the shape memory material through said vessel the matter is carried from the vessel.”
- Features and advantages of the present invention will become apparent from the following description. Applicants are providing this description, which includes drawings and examples of specific embodiments, to give a broad representation of the invention. Various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this description and by practice of the invention. The scope of the invention is not intended to be limited to the particular forms disclosed and the invention covers all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the claims.
- The present invention provides a flexible extension for a shape memory polymer occlusion removal device that functions to enhance maneuverability of the shape memory polymer occlusion removal device through tortuous paths en route to the occlusion. The shape memory polymer occlusion removal device can be used to remove non-vascular or vascular occlusions (e.g., blood clot). Such occlusions may include a thrombus (clot), plaque, fatty deposits, and other natural materials as well as fragments of man made devices. An example of an application is blood clot removal following ischemic stroke.
- The present invention provides an apparatus for use with a catheter for occlusion removal in a vessel. A shape memory polymer instrument consists of a shape memory polymer actuator operatively connected to the distal end of a transport vehicle for transport through the vessel via a catheter. A flexible elongated unit is operatively connected to the distal end of the shape memory polymer actuator. In one embodiment, the flexible elongated unit is a flexible guide wire. In another embodiment, the flexible elongated unit is a guide wire extension. In one embodiment, the flexible elongated unit comprises wire windings. Another embodiment includes an optical fiber that extends from the transport vehicle and the shape memory polymer actuator surrounds the optical fiber. In one embodiment, the flexible elongated unit is an optical fiber.
- The invention is susceptible to modifications and alternative forms. Specific embodiments are shown by way of example. It is to be understood that the invention is not limited to the particular forms disclosed. The invention covers all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the claims.
- The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate specific embodiments of the invention and, together with the general description of the invention given above, and the detailed description of the specific embodiments, serve to explain the principles of the invention.
-
FIG. 1 is a conceptual illustration of an embodiment of the present invention. -
FIG. 2 illustrates another embodiment of the present invention. -
FIG. 3 illustrates yet another embodiment of the present invention. - Referring now to the drawings and in particular to
FIG. 1 , a medical application of an embodiment of a guide wire extension for shape memory polymer occlusion removal device constructed in accordance with the present invention is illustrated. The guide wire extension for shape memory polymer occlusion removal device is designated generally by thereference numeral 100. Although a specific application of the present invention is described, it is to be understood that the invention is intended to be general in nature, and can be employed wherever occlusion removal devices are needed. The methods and devices are general to all applications of actuation and control of a shaped memory material device. The invention is not limited to the particular forms disclosed. The invention covers all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the claims. - The guide wire extension for shape memory polymer
occlusion removal device 100 is utilized with a catheter (not shown). The shape memory polymer (SMP) occlusion removal instrument comprises an SMPmechanical actuator 102 attached to the distal end of atransport vehicle 101 for delivery through the vessel via a catheter. Theguide wire extension 103 is used to enhance maneuverability of the SMP occlusion removal instrument through tortuous paths (e.g., neurovasculature) en route to the occlusion. - The guide wire extension for shape memory polymer
occlusion removal device 100 comprises a flexible guide wire or guide wire-like extension 103. The flexible guide wire or guide wire-like extension 103 is attached to or protrudes from thedistal end 104 of the shape memory polymer (SMP)mechanical actuator 102. The shape memory polymer (SMP)mechanical actuator 102 is used to remove non-vascular or vascular occlusions (e.g., blood clot). Such occlusions may include a thrombus (clot), plaque, fatty deposits, and other natural materials as well as fragments of man made devices. An example of an application is blood clot removal following ischemic stroke. - The shape memory polymer (SMP)
mechanical actuator 102 uses heat to activate a shape memory material. The shape memory material will change shape when heated above a transition temperature. The shape memory material is adapted to move from a first position to a second position where it can perform a desired function. Shape memory polymer (SMP) mechanical instruments are known, for example shape memory polymer (SMP) mechanical instruments are described in United States Patent Application 2002/0095169 published Jul. 18, 2002 and United States Patent Application 2004/0133231 published Jul. 8, 2004 by Duncan Maitland et al. The disclosures of United States Patent Application 2002/0095169 published Jul. 18, 2002 and United States Patent Application 2004/0133231 published Jul. 8, 2004 are incorporated herein by reference. - The
transport vehicle 101 with the shape memory polymer (SMP)actuator 102 is transported via a catheter to the site of the matter to be removed. Theshape memory actuator 102 is passed through or around the matter. Heat is utilized to activate the shape memory material and transform the shape memory material. By withdrawing the shape memory polymer (SMP) mechanical instrument through the vessel the matter is carried from the body. - Referring now to
FIG. 2 , another embodiment of a medical application of an embodiment of a guide wire extension for shape memory polymer occlusion removal device constructed in accordance with the present invention is illustrated. This embodiment of the guide wire extension for shape memory polymer occlusion removal device is designated generally by thereference numeral 200. - The guide
wire extension device 200 is utilized with a catheter (not shown) in the same manner as thedevice 100 illustrated inFIG. 1 and previously described. A shape memory polymer (SMP) mechanical actuator 201 is attached to the distal end of a transport vehicle (not shown). The shape memory polymer (SMP) mechanical actuator 201 is a device such as the shape memory polymer (SMP) mechanical instruments described in United States Patent Application 2002/0095169 published Jul. 18, 2002 and United States Patent Application 2004/0133231 published Jul. 8, 2004 by Duncan Maitland et al which are incorporated herein by reference. - The transport vehicle with the shape memory polymer (SMP) actuator 201 is transported to the site of the matter to be removed. The shape memory actuator 201 is passed through or around the matter. Heat is utilized to activate the shape memory material and transform the shape memory material. By withdrawing the transport vehicle and the shape memory polymer (SMP) mechanical actuator 201 through the vessel the matter is carried from the body. The guide
wire extension device 200 is used to enhance maneuverability of the SMP occlusion removal instrument 201 through tortuous paths (e.g., neurovasculature) en route to the occlusion. - The guide
wire extension device 200 comprises a flexible guide wire-like extension 202. The flexible guide wire-like extension 202 is connected to thedistal end 207 of the shape memory polymer (SMP) mechanical actuator 201. The flexible guide wire-like extension 202 is made ofwire windings 206. The flexible guide wire-like extension 202 includes anattachment section 203, an elongated guiding section 205, and a transition section 204. The flexible guide wire-like extension 202 is connected to the shape memory polymer (SMP) actuator 201 by overlapping thewire windings 206 of theattachment section 203 of theextension 202 over thedistal end 207 of the SMP actuator 201. In one embodiment, theattachment section 203 of theextension 202 is secured to the SMP actuator 201 with epoxy or by another suitable attachment. - Referring now to
FIG. 3 , another embodiment of a medical application of an embodiment of a guide wire extension for shape memory polymer occlusion removal device constructed in accordance with the present invention is illustrated. This embodiment of the guide wire extension for shape memory polymer occlusion removal device is designated generally by thereference numeral 300. - The guide wire extension for shape memory polymer
occlusion removal device 300 is utilized with a catheter (not shown) in the same manner as thedevice 100 illustrated inFIG. 1 and previously described. A shape memory polymer (SMP)mechanical actuator 302 is attached to the distal end of thetransport vehicle 301. The guidewire extension device 300 is used to enhance maneuverability of the SMP occlusion removal instrument through tortuous paths (e.g., neurovasculature) en route to the occlusion. - The guide wire extension for shape memory polymer
occlusion removal device 300 comprises aflexible guide wire 303. Theflexible guide wire 303 is attached to and protrudes from the distal end of the shape memory polymer (SMP)mechanical actuator 302. Theflexible guide wire 303 comprises a flexible guide wire connected to the distal end of the shape memory polymer (SMP)mechanical actuator 302. - The shape memory polymer (SMP)
mechanical actuator 302 is a device such as the shape memory polymer (SMP) mechanical instruments described in United States Patent Application 2002/0095169 published Jul. 18, 2002 and United States Patent Application 2004/0133231 published Jul. 8, 2004 by Duncan Maitland et al which are incorporated herein by reference. Thetransport vehicle 301 with the shape memory polymer (SMP)actuator 302 is transported to the site of the matter to be removed. Theshape memory actuator 302 is passed through or around the matter. Heat is utilized to activate the shape memory material and transform the shape memory material. By withdrawing thetransport vehicle 301 and the shape memory polymer (SMP)mechanical actuator 302 through the vessel the matter is carried from the body. - An
optical fiber 304 is carried by thetransport vehicle 301. Theoptical fiber 304 extends beyond the distal end of thetransport vehicle 301 and the shape memory polymer (SMP)mechanical actuator 302 comprises ashape memory polymer 305 that surrounds theoptical fiber 304. Theflexible guide wire 303 is connected to the distal end of the shape memory polymer (SMP)mechanical actuator 302 by connection to theoptical fiber 304. In one embodiment, theflexible guide wire 303 is an optical fiber. - While the invention may be susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and have been described in detail herein. However, it should be understood that the invention is not intended to be limited to the particular forms disclosed. Rather, the invention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the following appended claims.
Claims (20)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/238,018 US7611524B1 (en) | 2005-09-27 | 2005-09-27 | Guide wire extension for shape memory polymer occlusion removal devices |
Applications Claiming Priority (1)
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US11/238,018 US7611524B1 (en) | 2005-09-27 | 2005-09-27 | Guide wire extension for shape memory polymer occlusion removal devices |
Publications (2)
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US7611524B1 US7611524B1 (en) | 2009-11-03 |
US20090275885A1 true US20090275885A1 (en) | 2009-11-05 |
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US11/238,018 Active 2026-06-05 US7611524B1 (en) | 2005-09-27 | 2005-09-27 | Guide wire extension for shape memory polymer occlusion removal devices |
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Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006108114A2 (en) | 2005-04-01 | 2006-10-12 | The Regents Of The University Of Colorado | A graft fixation device and method |
US20090248141A1 (en) * | 2006-03-30 | 2009-10-01 | The Regents Of The University Of Colorado | Shape Memory Polymer Medical Devices |
EP2413840B1 (en) | 2009-04-02 | 2016-08-17 | Endoshape, Inc. | Vascular occlusion devices |
US10010327B2 (en) | 2010-12-16 | 2018-07-03 | Lawrence Livermore National Security, Llc | Expandable implant and implant system |
US9427493B2 (en) | 2011-03-07 | 2016-08-30 | The Regents Of The University Of Colorado | Shape memory polymer intraocular lenses |
JP2015511828A (en) | 2012-01-17 | 2015-04-23 | エンドシェイプ,インク. | Occlusion device for vascular or biological lumens |
CN105073031B (en) | 2013-03-13 | 2017-10-27 | 内形有限公司 | Continuous embolic coil and its carrying method and device |
US10499935B2 (en) | 2015-04-08 | 2019-12-10 | Lawrence Livermore National Security, Llc | Shape memory embolectomy devices and systems |
WO2017019553A1 (en) | 2015-07-27 | 2017-02-02 | The Texas A&M University System | Medical devices coated with shape memory polymer foams |
CN114601976A (en) | 2017-03-14 | 2022-06-10 | 形状记忆医疗公司 | Shape memory polymer foam to seal the space around a valve |
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US6425909B1 (en) * | 1999-11-04 | 2002-07-30 | Concentric Medical, Inc. | Methods and devices for filtering fluid flow through a body structure |
US20030171741A1 (en) * | 2001-11-14 | 2003-09-11 | Latis, Inc. | Catheters for clot removal |
US20030195554A1 (en) * | 2001-08-24 | 2003-10-16 | Shen Christopher T. | Embolic filter |
US20030236533A1 (en) * | 2002-06-20 | 2003-12-25 | The Regents Of The University Of California | Shape memory polymer actuator and catheter |
US6692509B2 (en) * | 1996-02-02 | 2004-02-17 | Regents Of The University Of California | Method of using a clot capture coil |
US6773448B2 (en) * | 2002-03-08 | 2004-08-10 | Ev3 Inc. | Distal protection devices having controllable wire motion |
US6818006B2 (en) * | 2001-04-03 | 2004-11-16 | Medtronic Vascular, Inc. | Temporary intraluminal filter guidewire |
US20050085846A1 (en) * | 2003-10-21 | 2005-04-21 | Scimed Life Systems, Inc. | Clot removal device |
US6932830B2 (en) * | 2002-01-10 | 2005-08-23 | Scimed Life Systems, Inc. | Disc shaped filter |
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US6692509B2 (en) * | 1996-02-02 | 2004-02-17 | Regents Of The University Of California | Method of using a clot capture coil |
US6425909B1 (en) * | 1999-11-04 | 2002-07-30 | Concentric Medical, Inc. | Methods and devices for filtering fluid flow through a body structure |
US20020095169A1 (en) * | 2000-11-06 | 2002-07-18 | The Regents Of The University Of California | Shape memory polymer actuator and catheter |
US6740094B2 (en) * | 2000-11-06 | 2004-05-25 | The Regents Of The University Of California | Shape memory polymer actuator and catheter |
US20040133231A1 (en) * | 2000-11-06 | 2004-07-08 | The Regents Of The University Of California | Shape memory polymer actuator and catheter |
US6818006B2 (en) * | 2001-04-03 | 2004-11-16 | Medtronic Vascular, Inc. | Temporary intraluminal filter guidewire |
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US20030171741A1 (en) * | 2001-11-14 | 2003-09-11 | Latis, Inc. | Catheters for clot removal |
US6932830B2 (en) * | 2002-01-10 | 2005-08-23 | Scimed Life Systems, Inc. | Disc shaped filter |
US6773448B2 (en) * | 2002-03-08 | 2004-08-10 | Ev3 Inc. | Distal protection devices having controllable wire motion |
US20030236533A1 (en) * | 2002-06-20 | 2003-12-25 | The Regents Of The University Of California | Shape memory polymer actuator and catheter |
US20050085846A1 (en) * | 2003-10-21 | 2005-04-21 | Scimed Life Systems, Inc. | Clot removal device |
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