With Shape Retaining Memory Patents (Class 604/530)
  • Patent number: 10335276
    Abstract: A catheter for positioning a valve during a transcatheter aortic valve replacement is formed from a resilient hollow body conformable to a guide wire when a guide wire is passed in through an upper opening in the hollow body and through the hollow body. When the guide wire is retracted, the catheter deploys to form a substantially straight upper shaft portion that extends downwardly from the upper opening and a distal ring perpendicular to the upper shaft portion. The distal ring approximates the size and shape of the patient's aortic valve annulus. An outer surface of the distal ring is radiopaque, and the distal ring comprises openings for dispersing radio opaque medium used in imaging. The deployed catheter is retracted until it snugly contacts the aortic valve annulus. The distal ring will be viewed as a straight line when the x-ray C-arm is properly aligned with the aortic valve annulus.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: July 2, 2019
    Inventor: Michael B. McDonald
  • Patent number: 10207085
    Abstract: The invention features is an embodiment of a drainage catheter to be used to drain fluid or gas from any body space with an improved distal tip of variable configuration, to facilitate passage of a guide wire used for catheter exchange. The invention also features an embodiment of a retention mechanism used to stabilize the drainage catheter in the body, where in this embodiment the retention mechanism is located outside of the lumen of the tube as it courses from its distal attachment sites to the catheter hub.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: February 19, 2019
    Inventor: Timothy Murphy
  • Patent number: 10004551
    Abstract: Methods and apparatus for the treatment of a body cavity or lumen are described where a heated fluid and/or gas may be introduced through a catheter and into treatment area within the body contained between one or more inflatable/expandable members. The catheter may also have optional pressure sensing elements which may allow for control of the pressure within the treatment zone and also prevent the pressure from exceeding a pressure of the inflatable/expandable members to thereby contain the treatment area between these inflatable/expandable members. Optionally, a chilled or room temperature fluid such as water may then be used to rapidly terminate the treatment session.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: June 26, 2018
    Assignee: Channel Medsystems, Inc.
    Inventor: Daniel R. Burnett
  • Patent number: 9861438
    Abstract: A medical device includes an insertion tube, having a longitudinal axis and having a distal end adapted for insertion through a body passage into a cavity within a body of a patient. An electrode is located on the distal end of the insertion tube and is configured to contact tissue in the cavity. A resilient member is contained within the distal end of the insertion tube and is configured, when unconstrained, to cause the distal end to bend away from the longitudinal axis in a curved shape and to straighten toward the longitudinal axis when subjected to a force.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: January 9, 2018
    Assignee: BIOSENSE WEBSTER (ISRAEL), LTD.
    Inventor: Assaf Govari
  • Patent number: 9839734
    Abstract: A disclosed apparatus or method can include or use a non-transluminally implantantable blood pump housing, which can be sized and shaped to be implanted at an aortic valve of a human subject, the pump housing can include: a pump housing cross-sectional profile size that is larger than is passable via a blood vessel of the human subject; and a power connection, configured for being electrically connected to an intravascular lead that is sized and shaped to extend from the pump housing through a subclavian artery of the human subject.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: December 12, 2017
    Assignee: Berlin Heart GmbH
    Inventors: Ares K. Menon, Peter Nüsser
  • Patent number: 9453501
    Abstract: Shape memory polymers featuring reversible actuation capability under ambient stimulus for integration with apparel. One approach is to use a multiblock polymer consisting of two (or potentially more) blocks in which the one block is the crystalline switching block with relatively low melting transitions, the other block has a higher thermal transition, and the two blocks are linked together by a linker molecule. Another approach is to use a graft copolymer having high and low melting transitions where the graft copolymer has a first polymer serving as the backbone and a second polymer being grafted to or from the backbone at certain graft locations. A further approach is to use latent crosslinking of a semicrystalline polymer with reactive groups placed on the backbone. Finally, these polymers may be formed as actuators that undergo curling, twisting and even volumetric expansion.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: September 27, 2016
    Inventor: Patrick T. Mather
  • Patent number: 9439727
    Abstract: A medical device includes an insertion tube, having a longitudinal axis and having a distal end adapted for insertion through a body passage into a cavity within a body of a patient. An electrode is located on the distal end of the insertion tube and is configured to contact tissue in the cavity. A resilient member is contained within the distal end of the insertion tube and is configured, when unconstrained, to cause the distal end to bend away from the longitudinal axis in a curved shape and to straighten toward the longitudinal axis when subjected to a force.
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: September 13, 2016
    Assignee: Biosense Webster (Israel) Ltd.
    Inventor: Assaf Govari
  • Patent number: 9358039
    Abstract: In various examples, an apparatus includes a needle assembly including an outer cannula including a tubular sidewall disposed around a lumen. At least a portion of the sidewall includes an exterior including a polymeric material configured to inhibit skiving of an interior of a dilator with movement of the outer cannula within the dilator. An inner cannula is disposed within the lumen and is selectively slidable with respect to the outer cannula. A handle is disposed at a proximal portion of the needle assembly. The handle includes a first handle portion coupled to and movable with the outer cannula. A second handle portion is coupled to and movable with the inner cannula, wherein the first handle portion is selectively movable with respect to the second handle portion to extend a distal end of the inner cannula from within the lumen of the outer cannula.
    Type: Grant
    Filed: May 7, 2013
    Date of Patent: June 7, 2016
    Assignee: Greatbatch Ltd.
    Inventors: Scott Kimmel, Rodolphe Katra, Kevin Pietsch, Brian Loushine, Jeffrey Zweber, Ed Goff, Blane Larson, Jordon Honeck, Grant Scheibe
  • Patent number: 9233226
    Abstract: A drainage catheter, including a catheter tube body that can have a pig-tail loop in a distal end, a rigid member configured to be placed inside of the catheter, a pig-tail straightening sleeve configured to move axially along the tube body, the sleeve having a lip formed on an end of the sleeve, the lip being configured to be positioned towards the distal end of the tube body, thereby straightening the catheter tube body and facilitating entry of the rigid member into the catheter tube body when the pig-tail straightening sleeve is positioned to straighten the catheter tube body.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: January 12, 2016
    Assignee: Merit Medical Systems, Inc.
    Inventors: Fred P. Lampropoulos, Nicholas Gerald Accisano, III, Louise Marini
  • Patent number: 9061123
    Abstract: A delivery catheter includes a pre-formed and resilient heart-wrapping segment. The segment may have a relaxed span that allows the segment to wrap around a left side of a heart from an anterior epicardial surface to a posterior epicardial surface, when the catheter is advanced along the epicardial surface, having been inserted from a sub-xiphoid access site.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: June 23, 2015
    Assignee: Medtronic, Inc.
    Inventors: Johnson E. Goode, Melissa Gene Tanner Christie, Stanten C. Spear, Rick D. McVenes
  • Patent number: 9060771
    Abstract: A surgical or laparoscopic method of treating obesity of a patient using a device adapted to stretch a portion of the stomach wall of said patient. The method comprising the steps of: cutting a hole in the abdominal wall of said patient, dissecting an area around the stomach, placing said device in contact with the stomach, and fixating, direct or indirect, through invagination of the stomach wall, said device to the stomach wall such that said device can stretch a portion of said stomach wall.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: June 23, 2015
    Inventor: Peter Forsell
  • Patent number: 9023011
    Abstract: A medical device including a shaft having an elongated inner member and an elongated tubular reinforcing member disposed over at least a portion of the inner member. In some embodiments, at least a portion of the outer surface of the inner member is spaced from the inner surface of the reinforcing member, defining a space substantially free of any other structures of the device. In some embodiments, the shaft can include a tip structure disposed on a distal portion of the inner member. In some such embodiments, the reinforcing member has a distal end, and the tip structure is disposed on the distal portion of the inner member adjacent the distal end of the reinforcing member. Additionally, in some embodiments, the reinforcing member can include a plurality of apertures defined therein, for example, to enhance the flexibility or other such characteristics of all or portions of the reinforcing member.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: May 5, 2015
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Stephen A. Griffin, Elaine Lim, Gregory E. Mirigian
  • Publication number: 20150119859
    Abstract: The present disclosure provides a strong, flexible catheter shaft for use in a catheter system. The flexible catheter shaft includes a braided polyimide tube including one or more outer layers of material of varying flexibility. The flexible catheter shaft provides a shaft having sufficient stiffness and kink resistance to allow an operator to advance an electrode basket connected to the flexible catheter shaft through a guide catheter to a target ablation site without causing vessel trauma. The distal tip of the flexible catheter shaft is designed to have sufficient flexibility to reduce any risk of kicking out a guide catheter when tracking the electrode basket around turns into side branches or bifurcations in the vasculature of a patient and includes a distal spring coil.
    Type: Application
    Filed: October 9, 2014
    Publication date: April 30, 2015
    Inventors: Tobias Cajamarca, Gregory James Dakin, Jeffrey John Strong
  • Publication number: 20150119862
    Abstract: The present disclosure provides a strong, flexible catheter shaft for use in a catheter system. The flexible catheter shaft includes a nitinol tube having one or more sets of cuts therein in combination with one or more outer jacket layers. The flexible catheter shaft provides a shaft having sufficient stiffness and kink resistance to allow an operator to advance an electrode basket connected to the flexible catheter shaft through a guide catheter to a target ablation site without causing vessel trauma. The distal tip of the flexible catheter shaft is designed to have sufficient flexibility to reduce any risk of kicking out a guide catheter when tracking the electrode basket around turns in the vasculature of a patient.
    Type: Application
    Filed: October 8, 2014
    Publication date: April 30, 2015
    Inventors: Tobias Cajamarca, Jeffrey John Strong, Russell D. Terwey, Bruce Robert Weir, Janson Lee Ayer, Ryan Kenneth Buesseler
  • Patent number: 9017309
    Abstract: It is intended to provide a thrombus-aspiration catheter capable of exerting flexibility and aspiration force even in the case where the tube in the front end side is a triple lumen tube or a contrast marker is provided at the front end. A thrombus-aspiration catheter (1) comprising a basal end side tube (2) of the double lumen type which has an aspiration lumen (11) and a core wire lumen (12), and a front end side tube (3) of the triple lumen type which has a guide wire lumen (13) in addition to the aspiration lumen (11) and the core wire lumen (12), wherein the front end of the above-described front end side tube is obliquely cut and a terminal aspiration tube (4) of a flexible double lumen, which has a front end opening (41) inclined in almost the same direction as the cut face (31), is connected to the cut face.
    Type: Grant
    Filed: April 1, 2008
    Date of Patent: April 28, 2015
    Assignee: Nipro Corporation
    Inventors: Masahiro Tanikawa, Ryota Umegaki, Yuki Nishimura
  • Patent number: 9011314
    Abstract: A system for implanting a catheter in a urethra. The system includes a catheter having a valve disposed at a distal portion of the catheter. The valve may be operable in response to an external magnetic field. The system also includes a tool having a tip member extending into an opening at the distal portion of the catheter to couple the tool to the catheter. the system also includes an element extending from the tool. The catheter has an internal path that provides a conduit for the element to be extended through the valve to engage a proximal portion of the catheter. The tool is adapted use the element to stress the catheter and stiffen the catheter along the length of the catheter. Stiffening the catheter facilitates implantation of the catheter in the urethra by enabling pull forces, push forces, and torque forces to be transmitted from the tool through the catheter to the proximal portion of the catheter without undue stress on the urethra.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: April 21, 2015
    Assignee: Ingenion Medical Limited
    Inventors: Phillip J Davis, Thomas W Winegar, Harvey D Homan, Andrew R Leopold
  • Patent number: 8983582
    Abstract: Methods and apparatuses for positioning medical devices onto (or close to) a desired portion of the interior wall of an internal channel, such as for scan imaging, for photodynamic therapy and/or for optical temperature measurement. In one embodiment, a catheter assembly has a distal portion that can be changed from a configuration suitable for traversing the internal channel to another configuration suitable for scan at least a spiral section of the interior wall of an internal channel, such as an artery. In one example, the distal portion spirals into gentle contact with (or close to) a spiral section of the artery wall for Optical Coherence Tomography (OCT) scanning. The spiral radius may be changed through the use of a guidewire, a tendon, a spiral balloon, a tube, or other ways.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: March 17, 2015
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventor: William E. Webler
  • Patent number: 8977333
    Abstract: A shape-imparting mechanism for a catheter that includes an elongate element dimensioned to fit within a lumen of an electrode sheath of a catheter. An insertion facilitating arrangement is carried at a distal end of the elongate element for facilitating insertion of the distal end of the elongate element into the lumen of the electrode sheath of the catheter.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: March 10, 2015
    Assignee: Cathrx Ltd
    Inventors: Neil L. Anderson, Matthew Partlett
  • Publication number: 20150045776
    Abstract: A catheter is described for use in cannulating a bile duct in ERCP or sphincterotomy procedures. The catheter has a continuous compound curve that has first and second curves. The first and second curves have radii of curvature and lengths that orient the tip of the catheter selectively toward a bile duct.
    Type: Application
    Filed: August 4, 2014
    Publication date: February 12, 2015
    Inventors: Jillian Haac, Vihar C. Surti
  • Patent number: 8926589
    Abstract: A medical device includes an insertion tube, having a longitudinal axis and having a distal end adapted for insertion through a body passage into a cavity within a body of a patient. An electrode is located on the distal end of the insertion tube and is configured to contact tissue in the cavity. A resilient member is contained within the distal end of the insertion tube and is configured, when unconstrained, to cause the distal end to bend away from the longitudinal axis in a curved shape and to straighten toward the longitudinal axis when subjected to a force.
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: January 6, 2015
    Assignee: Biosense Webster (Israel) Ltd.
    Inventor: Assaf Govari
  • Patent number: 8827982
    Abstract: A delivery catheter includes a pre-formed and resilient heart-wrapping segment. The segment may have a relaxed span that allows the segment to wrap around a left side of a heart from an anterior epicardial surface to a posterior epicardial surface, when the catheter is advanced along the epicardial surface, having been inserted from a sub-xiphoid access site.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: September 9, 2014
    Assignee: Medtronic, Inc.
    Inventors: Johnson E. Goode, Melissa Gene Tanner Christie, Stanten C. Spear, Rick D. McVenes
  • Publication number: 20140128848
    Abstract: A vascular access catheter is disclosed that has a leading guidewire lumen. The guidewire lumen is configured for receiving a guidewire and may extend a partial length of the catheter or substantially the entire length of the catheter. A lumen of the catheter can have an opening located in an angled edge distal end portion of the catheter next to the distal tip. A second lumen can have an opening that is positioned in the outer surface of the catheter shaft, and is spaced proximally from the first lumen opening.
    Type: Application
    Filed: January 9, 2014
    Publication date: May 8, 2014
    Applicant: ANGIODYNAMICS, INC.
    Inventors: William M. Appling, Theodore Beyer, Carol L. Lancette
  • Publication number: 20140114255
    Abstract: A medical device includes an elongate single-wire memory-metal body with a complete length that includes a proximal stylet length, an intermediate self-coiling stylet length, and a distal stylet length that is generally straight and non-self-coiling. The moment of force of the self-coiling stylet length is less than the moment of force of the medical endoscopy needle that is resistant to the stylet's self-coiling force. The device may further include being incorporated into an endoscopy needle system where the single-wire stylet body is disposed through a lumen of a medical endoscopy needle.
    Type: Application
    Filed: October 16, 2013
    Publication date: April 24, 2014
    Applicant: Cook Medical Technologies LLC
    Inventors: Nathaniel A. Irwin, Michael S. Clancy, Darach McGrath, Ciarán Toomey, Ronan Leahy
  • Publication number: 20140114254
    Abstract: A medical device includes an elongate single-wire memory-metal body with a complete length that includes a proximal stylet length, an intermediate self-coiling stylet length, and a distal stylet length that is generally straight and non-self-coiling. The moment of force of the self-coiling stylet length is less than the moment of force of the medical endoscopy needle that is resistant to the stylet's self-coiling force. The device may further include being incorporated into an endoscopy needle system where the single-wire stylet body is disposed through a lumen of a medical endoscopy needle.
    Type: Application
    Filed: October 16, 2013
    Publication date: April 24, 2014
    Applicant: Cook Medical Technologies LLC
    Inventors: Nathaniel A. Irwin, Michael S. Clancy, Darach McGrath, Ciarán Toomey, Ronan Leahy, Fionan Keady
  • Patent number: 8685000
    Abstract: A shape memory material with integrated actuation using embedded particles. One embodiment provides a shape memory material apparatus comprising a shape memory material body and magnetic pieces in the shape memory material body. Another embodiment provides a method of actuating a device to perform an activity on a subject comprising the steps of positioning a shape memory material body in a desired position with regard to the subject, the shape memory material body capable of being formed in a specific primary shape, reformed into a secondary stable shape, and controllably actuated to recover the specific primary shape; including pieces in the shape memory material body; and actuating the shape memory material body using the pieces causing the shape memory material body to be controllably actuated to recover the specific primary shape and perform the activity on the subject.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: April 1, 2014
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Patrick R. Buckley, Duncan J. Maitland
  • Patent number: 8663196
    Abstract: An endovascular sheath apparatus 2 is provided. The endovascular sheath apparatus 2 includes an inner tube 12 that includes a lumen 26 for introducing medical fluids or devices and an outer surface. The apparatus 2 further includes an outer tube 22 with an interior surface. The outer and inner surfaces define a cavity 28 therebetween. The apparatus 2 still further includes a stiffening component 20 which in one embodiment includes a braided material that is at least partially received in at least part of the cavity 28. An actuating mechanism 18 cooperates with the stiffening component 20. A method of providing intravascular delivery of a sheath includes the steps of providing an inner tube 12; positioning a stiffening component 20 around the inner tube 12; and deploying an actuating mechanism 18 that cooperates with the stiffening component 20, a stiffness characteristic of which being adjustable extra-corporeally by movement of the actuating mechanism in combination with the stiffening component.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: March 4, 2014
    Assignee: Kassab Kughn Endovascular Devices LLC
    Inventors: Elias Habib Kassab, Mark Edwin Zyzelewski
  • Patent number: 8636716
    Abstract: A medical device including a shaft having an elongated inner member and an elongated tubular reinforcing member disposed over at least a portion of the inner member. In some embodiments, at least a portion of the outer surface of the inner member is spaced from the inner surface of the reinforcing member, defining a space substantially free of any other structures of the device. In some embodiments, the shaft can include a tip structure disposed on a distal portion of the inner member. In some such embodiments, the reinforcing member has a distal end, and the tip structure is disposed on the distal portion of the inner member adjacent the distal end of the reinforcing member. Additionally, in some embodiments, the reinforcing member can include a plurality of apertures defined therein, for example, to enhance the flexibility or other such characteristics of all or portions of the reinforcing member.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: January 28, 2014
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Stephen A. Griffin, Elaine Lim, Gregory E. Mirigian
  • Publication number: 20130304181
    Abstract: Catheter including an inner tubular member having a fluid lumen defined therein and an exterior surface. The exterior surface defining a first distal flow port and a second distal flow port. An outer tubular member is movable relative to the inner tubular member in a proximal direction and having an interior surface. A first pressure chamber is defined between the exterior surface and the interior surface, and between a first distal seal assembly and a first proximal seal assembly. A second pressure chamber is defined between the exterior surface and the interior surface, and between a second distal seal assembly and a second proximal seal assembly. Fluid introduced through the fluid lumen pressurizes the first pressure chamber and the second pressure chamber to generate a respective force at the first proximal seal assembly and to the second proximal seal assembly to urge the outer tubular member in the proximal direction.
    Type: Application
    Filed: May 9, 2012
    Publication date: November 14, 2013
    Inventors: Michael L. Green, Michael R. Bialas
  • Patent number: 8517959
    Abstract: A guide wire for medical treatment includes a straight-line shaped proximal section and a distal section which is continuous with the distal side of the proximal section and whose most distal portion faces toward the proximal direction. The distal section includes a curved portion continuous with the proximal section and a distal portion continuous with the distal side of the curved portion, the proximal section and at least a portion on the proximal side of the curved portion continuous with the proximal section are positioned on an identical plane, and the distal portion is extended toward a direction backing away from the plane and includes the most distal portion in a section of a direction to which the curved portion is curved with respect to an plane n an axis core of the proximal section orthogonal to the plane.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: August 27, 2013
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Tomokane Kurosawa, Yutaka Tano
  • Patent number: 8496644
    Abstract: A percutaneous catheter includes a longitudinal catheter shaft having a distal end, a proximal end, a hollow portion, and a wall portion, a wire embedded within said wall portion at said distal end wherein said wire forms a pigtail curve when in a relaxed state, and a stylet capable of entering said hollow portion of said longitudinal catheter at said proximal end wherein said stylet substantially straightens said longitudinal catheter at said distal end.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: July 30, 2013
    Assignee: AngioDynamics, Inc.
    Inventors: Richard Graffam, Ben Morris, Chuck Bourgeois
  • Patent number: 8444625
    Abstract: Some embodiments relate to a catheter system having a changeable or adjustable working length. The catheter system can comprise a proximal end, a distal end, and a first axial lumen configured to receive a guidewire formed through at least a portion of the catheter body. A first opening can be formed through a portion of the catheter body and be in communication with the first lumen. The sheath can be rotatable, axially movable, or otherwise changeable from at least a first position to a second position, wherein the sheath can substantially cover the first opening in the catheter body in the first position, and can substantially expose the first opening in the catheter body in the second position.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: May 21, 2013
    Assignee: Nexeon Medsystems, Inc.
    Inventors: Kent C. B. Stalker, John D. Whitfield, Mark C. Bates, Peter J. D'Aquanni, Jason Andrew Habeger
  • Patent number: 8439859
    Abstract: The catheter device comprises a drive shaft connected to a motor, and a rotor mounted on the drive shaft at the distal end section. The rotor has a frame structure which is formed by a screw-like boundary frame and rotor struts extending radially inwards from the boundary frame. The rotor struts are fastened to the drive shaft by their ends opposite the boundary frame. Between the boundary frame and the drive shaft extends an elastic covering. The frame structure is made of an elastic material such that, after forced compression, the rotor unfolds automatically.
    Type: Grant
    Filed: September 15, 2008
    Date of Patent: May 14, 2013
    Assignee: AIS GmbH Aachen Innovative Solutions
    Inventors: Joachim Georg Pfeffer, Thomas Schmitz-Rode, Rolf W. Günther
  • Patent number: 8377038
    Abstract: Medical devices, such as catheters, including shape memory materials, are provided, as well as related methods of making and using such medical devices.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: February 19, 2013
    Assignee: Boston Scientific Scimed, Inc.
    Inventor: Tracee Eidenschink
  • Patent number: 8377037
    Abstract: A series of medical instruments can be made with the use of shape memory tube with a transformation temperature that is above or below the ambient temperature. In the first case, the material behaves with the shape memory effect and in the second case the behavior is superelastic. The wall of the tube has been provided with a plurality of slots in specific places, often near or at the distal end of the instrument, and in specific arrangements which allow local variations in diameter, shape, and/or length. These variations can either be caused by the memory effect during temperature change or by superelastic behavior during change of the mechanical influences on the memory metal by the surrounding material.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: February 19, 2013
    Assignee: EVM Systems LLC
    Inventors: Rohit C. L. Sachdeva, Petrus A. Besselink
  • Patent number: 8328791
    Abstract: Catheter assembly including an elongate shaft comprising a thermoplastic polymer such as a thermoplastic shape memory polymer having a pre-selected glass transition temperature (Tg) and a means for heating the thermoplastic polymer, wherein the thermoplastic polymer is in a rubbery state at temperatures above the glass transition temperature and is in a glassy state at temperatures below the glass transition temperature. The elongate shaft may be selectively heated and cooled to provide sufficient flexibility and retention during a medical procedure.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: December 11, 2012
    Assignees: Stryker Corporation, Stryker NV Operations Limited
    Inventor: Stephen Griffin
  • Patent number: 8317773
    Abstract: A vascular access catheter is disclosed that has a catheter shaft with a distal end portion with a distal tip having a sloped face that is positioned at an acute angle from the distal tip relative to a longitudinal axis of the catheter shaft. A first, second, and third lumen extend longitudinally through the catheter shaft. The third lumen is configured for receiving a guidewire and may extend a partial length of the catheter or substantially the entire length of the catheter. The first lumen has an aperture located in the angled edge distal end portion of the catheter next to the distal tip and communicates with the first lumen. The second lumen has an aperture that is positioned in the outer surface of the catheter shaft that is in communication with the second lumen, and is spaced proximally from the first lumen aperture.
    Type: Grant
    Filed: November 7, 2006
    Date of Patent: November 27, 2012
    Assignee: Angio Dynamics, Inc.
    Inventors: William M. Appling, Theodore J. Beyer, Carol L. Lancette
  • Patent number: 8241267
    Abstract: An apparatus and method for curving a catheter after deployment include a catheter having a primary lumen, a secondary lumen, and a resilient fiber contained within the secondary lumen. The resilient fiber and the secondary lumen have corresponding, preformed curve shapes when the catheter is in a straight, unstressed condition. The resilient fiber is slidable within the secondary lumen to create a desired curve shape in the catheter as the curved portion of the resilient fiber slides into an originally straight portion of the secondary lumen. In another embodiment, the preformed curve shape of the resilient fiber is held in a straight condition within a stiff, marker ring segment of the catheter until after the catheter is deployed. Once deployed, the resilient fiber is slid out of the marker ring segment, and the preformed curve shape of the resilient fiber creates a corresponding curve shape in the catheter.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: August 14, 2012
    Assignee: Volcano Corporation
    Inventor: Matt D. Pursley
  • Publication number: 20120190976
    Abstract: A “Smart Micro-catheter” (SMC) system comprising a device for controlled particle release and drug delivery into a blood vessel, hepatic artery or any patho-physiological target is disclosed. Methods of using the micro-catheter system for optimal targeted delivery of therapeutic microspheres comprising using subject-specific computer simulations of particle-hemodynamics are further provided.
    Type: Application
    Filed: July 28, 2010
    Publication date: July 26, 2012
    Inventor: Clement Kleinstreuer
  • Patent number: 8221388
    Abstract: A medical clamping assembly includes a housing defining a chamber and a deflecting member operable to slide relative to the housing between a first position and a second position. A conduit is also provided within the housing and is adapted for fluid coupling to a medical device. The medical clamping assembly also includes a biasing element disposed within the housing adjacent to the conduit. The deflecting member is movable relative to the housing between the first position corresponding to an open state of the conduit and the second position corresponding to a closed state of the conduit whereby the biasing element compresses the conduit to substantially close a lumen of the conduit.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: July 17, 2012
    Assignee: Tyco Healthcare Group LP
    Inventor: David R. Swisher
  • Publication number: 20120123328
    Abstract: A guide catheter includes a tubular section formed of a shape memory polymer that can transform dynamically between first and second states or conditions, or among three states or conditions, to provide a wide range of properties of the guide catheter as desired during delivery of the guide catheter through the vasculature to a target site, and removal of the guide catheter from the target site and vasculature. The states or conditions of the shape memory polymer be dynamically changed to vary properties of the tubular section such as stiffness, flexibility, shape, or biodegradability, which can be controlled by exposure of the shape memory polymer to temperature changes, electric fields, magnetic fields, wavelengths of light, and chemical solutions.
    Type: Application
    Filed: November 14, 2011
    Publication date: May 17, 2012
    Applicant: MICRUS ENDOVASCULAR LLC
    Inventor: Eric Williams
  • Patent number: 8118817
    Abstract: An embolization delivery system and a method of using the system by a physician to deliver an embolization coil into the vasculature of a patient is disclosed. The embolization delivery system includes a delivery tube in the form of a catheter or wire guide that may be reversibly inserted, a delivery catheter placed into the vasculature of a patient, a connector disposed around and permanently coupled to the delivery tube, a detachable embolization coil disposed within a portion of the connector and held in place by compressive forces exerted by the connector, and a release mechanism for detaching the embolization coil. The release mechanism includes a wire with one end being coupled to the catheter, a middle portion being in contact with both the connector and coil, and a second end that may be manipulated in a predetermined manner by the attending physician.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: February 21, 2012
    Assignee: Cook Medical Technologies LLC
    Inventor: Kurt J. Tekulve
  • Patent number: 8062566
    Abstract: Ultrasound catheter devices and methods provide enhanced disruption of blood vessel obstructions. Generally, ultrasound catheters include an elongate flexible catheter body with one or more lumens, an ultrasound transmission member extending longitudinally through the catheter body lumen and a distal head coupled with the transmission member and positioned adjacent the distal end of the catheter body for disrupting occlusions. Improved features of ultrasound catheters include prevention of independent rotation of the ultrasound transmission member, a safety anchor for the distal head, a one-piece transmission member/distal head and the like.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: November 22, 2011
    Assignee: Flowcardia, Inc.
    Inventors: Henry Nita, Jeff Sarge, Simon Nguyen, Richard Spano
  • Patent number: 8062284
    Abstract: A catheter assembly including at least one introducer defining a passage receiving an elongate tubular member having a proximal end, a distal end, and a lumen extending between an elongate shape-imparting element received in the lumen and imparting a predetermined shape to the distal end of the elongate tubular member, when the distal end of the elongate tubular member is extended beyond a distal end of the at least one introducer. A distal end of the one-piece shape-imparting element extends from the lumen of the elongate tubular member and is anchored proximal the distal end of the at least one introducer.
    Type: Grant
    Filed: January 20, 2005
    Date of Patent: November 22, 2011
    Assignee: Cathrx Ltd
    Inventor: Norman Booth
  • Patent number: 8052670
    Abstract: A series of medical instruments can be made with the use of shape memory tube with a transformation temperature that is above or below the ambient temperature. In the first case, the material behaves with the shape memory effect and in the second case the behavior is superelastic. The wall of the tube has been provided with a plurality of slots in specific places, often near or at the distal end of the instrument, and in specific arrangements which allow local variations in diameter, shape, and/or length. These variations can either be caused by the memory effect during temperature change or by superelastic behavior during change of the mechanical influences on the memory metal by the surrounding material.
    Type: Grant
    Filed: May 2, 2006
    Date of Patent: November 8, 2011
    Assignee: EVM Systems LLC
    Inventors: Rohit C. L. Sachdeva, Petrus A. Besselink
  • Patent number: 8048060
    Abstract: A medical device including a shaft having an elongated inner member and an elongated tubular reinforcing member disposed over at least a portion of the inner member. In some embodiments, at least a portion of the outer surface of the inner member is spaced from the inner surface of the reinforcing member, defining a space substantially free of any other structures of the device. In some embodiments, the shaft can include a tip structure disposed on a distal portion of the inner member. In some such embodiments, the reinforcing member has a distal end, and the tip structure is disposed on the distal portion of the inner member adjacent the distal end of the reinforcing member. Additionally, in some embodiments, the reinforcing member can include a plurality of apertures defined therein, for example, to enhance the flexibility or other such characteristics of all or portions of the reinforcing member.
    Type: Grant
    Filed: August 16, 2006
    Date of Patent: November 1, 2011
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Stephen Griffin, Elaine Lim, Gregory E. Mirigian
  • Patent number: 8034046
    Abstract: Medical devices, such as catheters, including shape memory materials, are provided, as well as related methods of making and using such medical devices.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: October 11, 2011
    Assignee: Boston Scientific Scimed, Inc.
    Inventor: Tracee Eidenschink
  • Patent number: 7959757
    Abstract: In a method and device for mounting an elongated member inside an elongated, elastic, flexible tubing, initially having an inside cross-sectional dimension that is approximately equal to or less than the outside cross-sectional dimension of the elongated member, the inner cross-sectional dimension of the flexible tubing is expanded by applying a pressurized fluid to the inner bore of the tubing, and inserting the elongated member into the tubing while the pressurized fluid is being applied.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: June 14, 2011
    Assignee: St. Jude Medical AB
    Inventors: Armin Barlov, Kent Söderman
  • Patent number: 7955315
    Abstract: A laparoscopic medical fluid delivery device includes a catheter having an articulating tip formed with shape memory properties and thus having a pre-shaped curvature. A tubular member is reciprocatingly slidable axially on the catheter to selectively cover and uncover portions of the articulating tip to thereby selectively vary the degree of curvature of the articulating tip. An actuator operatively linked to the tubular member selectively moves the tubular member reciprocatingly on the catheter. The pre-shaped articulating tip of the catheter is constrained by the tubular member from articulating to the pre-shaped curvature when the tubular member covers the articulating tip, and bends to a selected degree of curvature when the articulating tip is at least partially uncovered by the tubular member.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: June 7, 2011
    Assignee: Ethicon, Inc.
    Inventors: Marc Feinberg, Jessica Liberatore, Richard Kocharian, Bruce E. Zaborowski
  • Patent number: 7942865
    Abstract: A guide catheter for accessing the coronary sinus ostium has a proximal portion and a distal portion formed into a preformed shape including a curved segment. The preformed shape includes a first arc, a second arc, a third arc, a fourth arc, and a generally straight terminal portion. The preformed shape is generally a J-shape, having a terminal portion generally parallel to the proximal portion, a generally closed arc or a generally open arc.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: May 17, 2011
    Assignee: Cardiac Pacemakers, Inc.
    Inventor: Eric T. Johnson
  • Patent number: 7909813
    Abstract: An apparatus and method for curving a catheter after deployment include a catheter having a primary lumen, a secondary lumen, and a resilient fiber contained within the secondary lumen. The resilient fiber and the secondary lumen have corresponding, preformed curve shapes when the catheter is in a straight, unstressed condition. The resilient fiber is slidable within the secondary lumen to create a desired curve shape in the catheter as the curved portion of the resilient fiber slides into an originally straight portion of the secondary lumen. In another embodiment, the preformed curve shape of the resilient fiber is held in a straight condition within a stiff, marker ring segment of the catheter until after the catheter is deployed. Once deployed, the resilient fiber is slid out of the marker ring segment, and the preformed curve shape of the resilient fiber creates a corresponding curve shape in the catheter.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: March 22, 2011
    Assignee: Volcano Corporation
    Inventor: Matt D. Pursley