Patents by Inventor Roger Hastings

Roger Hastings has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6089235
    Abstract: An in vivo source of mechanical energy is provided in close proximity to its load. In the disclosed embodiments, the mechanical energy source is a miniaturized motor ("micromotor") and the load is a miniaturized perfusion pump located at the distal end of a transluminal catheter. The motor is powerful enough to provide the electrical energy needed by the perfusion pump to fluid, and yet small enough to fit inside a body vessel. A position sensor may be provided for automatically controlling the motor's driving current so that it is corresponds to the applied load. An embodiment of the perfusion pump is also provided in which an external energy source is used. Another embodiment is provided wherein a balloon/pump/miniaturized-motor configuration is provided on a distal end of a catheter.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: July 18, 2000
    Assignee: Scimed Life Systems, Inc.
    Inventors: Roger Hastings, Kenneth Larson, Michael Berman, Daniel M Lafontaine
  • Patent number: 5941871
    Abstract: A catheter system having a changeable distal member. The catheter system includes a proximal member, including a shaft having a proximal end, a distal end and a lumen extending therethrough. A distal member is included having a distal portion which may be passed through the lumen of the proximal member and releasably sealed to the proximal member at a desired location during a catheter procedure. The distal member may further include a push member operably coupled to the distal portion. The distal member may include a fluid-tight releasable seal for releasably sealing the distal member to the proximal member.
    Type: Grant
    Filed: March 20, 1998
    Date of Patent: August 24, 1999
    Assignee: SciMed Life Systems, Inc.
    Inventors: Daniel O. Adams, Roger Hastings, Louis Ellis
  • Patent number: 5823199
    Abstract: An in vivo source of mechanical energy is provided in close proximity to its load. In the disclosed embodiments, the mechanical energy source is a miniaturized motor ("micromotor") and the load is a miniaturized perfusion pump located at the distal end of a transluminal catheter. The motor is powerful enough to provide the electrical energy needed by the perfusion pump to fluid, and yet small enough to fit inside a body vessel. A position sensor may be provided for automatically controlling the motor's driving current so that it is corresponds to the applied load. An embodiment of the perfusion pump is also provided in which an external energy source is used. Another embodiment is provided wherein a balloon/pump/miniaturized-motor configuration is provided on a distal end of a catheter.
    Type: Grant
    Filed: February 5, 1997
    Date of Patent: October 20, 1998
    Assignee: SciMed Life Systems, Inc.
    Inventors: Roger Hastings, Kenneth Larson, Michael Berman, Daniel M. Lafontaine
  • Patent number: 5795318
    Abstract: A temporary stent comprises a coil of tubular thermoplastic material and a heating element inside the tubular material, or a film with a metal film resistive heating element coated thereon. A method of temporarily supporting the wall of a vessel comprises the steps of inserting a thermoplastic body having a first outer dimension less than the inside dimension of the vessel into the vessel to the desired support position; heating the thermoplastic above its softening transition temperature and expanding it to a second outer dimension larger than its first outer dimension; cooling the thermoplastic body to below its softening transition temperature while at its second outer dimension; allowing the cooled thermoplastic body to temporarily support the vessel; heating the thermoplastic above its softening transition temperature to soften the thermoplastic; and removing the softened thermoplastic body from the vessel.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: August 18, 1998
    Assignee: Scimed Life Systems, Inc.
    Inventors: Lixiao Wang, Roger Hastings, Paul Buscemi, Sew-Wah Tay
  • Patent number: 5776080
    Abstract: The present invention is a device and method for controlling longitudinal movement of a tube relative to a shaft slidably disposed within the tube, especially in the catheterization of a patient. An operative segment on the shaft cooperates with an ancillary tool to create a coupling force field between the shaft and the tool. The tube can then be moved over the shaft while the coupling force field operates through the tube to restrict the movement of the shaft. In the preferred embodiment, the shaft is a guide wire and the tube is a catheter with a lumen for slidably receiving the guide wire, while the coupling force field is created magnetically. In one embodiment, the operative segment is borne on a short guide wire extension which is selectively securable to a standard guide wire.
    Type: Grant
    Filed: May 2, 1997
    Date of Patent: July 7, 1998
    Assignee: SciMed Life Systems, Inc.
    Inventors: Scott Thome, Kevin Klitz, Janet L. Jacobsen, Kevin Kang, Roger Hastings
  • Patent number: 5730734
    Abstract: A catheter system having a changeable distal member. The catheter system includes a proximal member, including a shaft having a proximal end, a distal end and a lumen extending therethrough. A distal member is included having a distal portion which may be passed through the lumen of the proximal member and releasably sealed to the proximal member at a desired location during a catheter procedure. The distal member may further include a push member operably coupled to the distal portion. The distal member may include a fluid-tight releasable seal for releasably sealing the distal member to the proximal member.
    Type: Grant
    Filed: November 14, 1996
    Date of Patent: March 24, 1998
    Assignee: SciMed Life Systems, Inc.
    Inventors: Daniel O. Adams, Roger Hastings, Louis Ellis
  • Patent number: 5716410
    Abstract: A temporary stent comprises a coil of tubular thermoplastic material and a heating element inside the tubular material, or a film with a metal film resistive heating element coated thereon. A method of temporarily supporting the wall of a vessel comprises the steps of inserting a thermoplastic body having a first outer dimension less than the inside dimension of the vessel into the vessel to the desired support position; heating the thermoplastic above its softening transition temperature and expanding it to a second outer dimension larger than its first outer dimension; cooling the thermoplastic body to below its softening transition temperature while at its second outer dimension; allowing the cooled thermoplastic body to temporarily support the vessel; heating the thermoplastic above its softening transition temperature to soften the thermoplastic; and removing the softened thermoplastic body from the vessel.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: February 10, 1998
    Assignee: Scimed Life Systems, Inc.
    Inventors: Lixiao Wang, Roger Hastings, Paul Buscemi, Sew-Wah Tay
  • Patent number: 5628719
    Abstract: An in vivo source of mechanical energy is provided in close proximity to its load. In the disclosed embodiments, the mechanical energy source is a miniaturized motor ("micromotor") and the load is a miniaturized perfusion pump located at the distal end of a transluminal catheter. The motor is powerful enough to provide the electrical energy needed by the perfusion pump to fluid, and yet small enough to fit inside a body vessel. A position sensor may be provided for automatically controlling the motor's driving current so that it is corresponds to the applied load. An embodiment of the perfusion pump is also provided in which an external energy source is used. Another embodiment is provided wherein a balloon/pump/miniaturized-motor configuration is provided on a distal end of a catheter.
    Type: Grant
    Filed: November 21, 1994
    Date of Patent: May 13, 1997
    Assignee: Scimed Life Systems, Inc.
    Inventors: Roger Hastings, Kenneth Larson, Michael Berman, Daniel M. Lafontaine
  • Patent number: 5617870
    Abstract: A sensor coil is located on guidewire or perfusion catheter and introduced into the body. First the sensor coil is isolated from blood flow and used to make a set of static measurements. Next the sensor coil is heated in the presence of blood flow and a set of dynamic measurements are made which reflect the blood flow past the sensor coil.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: April 8, 1997
    Assignee: Scimed Life Systems, Inc.
    Inventors: Roger Hastings, Paul Feld
  • Patent number: 5588442
    Abstract: Guide catheter exchange device and method of exchanging a guide catheter. The guide catheter exchange device includes a magnetically responsive segment located on a proximal end for maintaining a previously placed guide wire in position across a stenosis, while performing a guide catheter exchange procedure. The guide catheter exchange device allows a guide catheter exchange procedure to be performed by a solo physician.
    Type: Grant
    Filed: March 2, 1995
    Date of Patent: December 31, 1996
    Assignee: SciMed Life Systems, Inc.
    Inventors: Brian Scovil, Todd A. Berg, Kevin Klitz, Thomas J. Bachinski, John W. Humphrey, Scott Thome, Roger Hastings
  • Patent number: 5501228
    Abstract: A percutaneous transluminal device for sensing the mechanical vibrations imparted to it inside a patient's vascular system. The preferred embodiments include a transducer attached to the distal end of a flexible guide wire. The transducer senses mechanical vibrations imparted to the guide wire in vivo and generates a corresponding electronic signal. Devices are provided for generating an audio or visual representation of the electronic signal.
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: March 26, 1996
    Assignee: SCIMED Life Systems, Inc.
    Inventors: Daniel M. Lafontaine, Roger Hastings, Daniel O. Adams
  • Patent number: 5450853
    Abstract: A pressure sensor having a tubular member partially filled with a ferrofluid column and partially filled with air, with an electrically conductive coil wrapped around the tubular member. When in use, the coil has alternating current running therethrough and the voltage across the coil is monitored. Physiologic pressure variations result in proportional variations in the position of the ferrofluid/air interface relative to the coil. This results in proportional changes in the coil voltage due to the change in coil inductance. The pressure sensor is compact and can be incorporated into many devices including a guide wire.
    Type: Grant
    Filed: October 22, 1993
    Date of Patent: September 19, 1995
    Assignee: Scimed Life Systems, Inc.
    Inventors: Roger Hastings, Ken Larson
  • Patent number: 5441516
    Abstract: Apparatus including a spiral coil body as a stent for temporarily supporting a body vessel internally, the spiral coil body being adjustable in diameter by relative rotation of at least one of the ends of the body from a proximal location.
    Type: Grant
    Filed: March 3, 1994
    Date of Patent: August 15, 1995
    Assignee: Scimed Lifesystems Inc.
    Inventors: Lixiao Wang, Martin R. Willard, Thomas T. Tran, Roger Hastings, Dale F. Schmaltz, Thomas J. Holman
  • Patent number: 5346508
    Abstract: An apparatus and method for performing diagnostics and intravascular therapies. A guidewire anemometer can be used to measure the velocity of fluid flowing through the vasculature. An in-line anemometer can be used to measure the volumetric flow rate of fluid transported out of a patient's body. A heated balloon catheter can be used to deliver heat therapy no a vessel wall in a patient's vasculature.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: September 13, 1994
    Assignee: SCIMED Life Systems, Inc.
    Inventor: Roger Hastings