Patents by Inventor Robert C. Hayzelden

Robert C. Hayzelden 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: 7419477
    Abstract: Methods of using a catheter involve providing a sheath comprising a proximal region, a deflection region, a distal-end region including a shapeable region, an anchor region defined between the deflection region and the shapeable region, and a longitudinal axis. The method also involves imparting a pre-established shape to the shapeable region. The method further involves applying axial force in a proximal direction at the anchor region so as to cause the deflection region to deflect relative to the longitudinal axis while the pre-established shape imparted to the shapeable region of the sheath is substantially maintained.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: September 2, 2008
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: John A. Simpson, Robert C. Hayzelden, Wade A. Bowe
  • Patent number: 6869414
    Abstract: A catheter employs a pre-formed distal end and a proximal deflection mechanism for steering the catheter. A shaped member extends from a shaped region of the catheter sheath to at least a portion of an anchor region. A steering ribbon extends from a proximal region of the sheath and passes within at least a portion of the anchor region. A distal end of the steering ribbon is joined with a proximal portion of the shaped member. At least one steering tendon is disposed within the sheath and has a first end attached at the anchor region and a second end located at the proximal region of the sheath. Movement of the steering tendon in a proximal direction causes the deflection region to deflect relative to the longitudinal axis of the catheter while the shape of shaped region of the sheath is substantially maintained.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: March 22, 2005
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: John A. Simpson, Robert C. Hayzelden, Wade A. Bowe
  • Publication number: 20040220520
    Abstract: Methods of using a catheter involve providing a sheath comprising a proximal region, a deflection region, a distal-end region including a shapeable region, an anchor region defined between the deflection region and the shapeable region, and a longitudinal axis. The method also involves imparting a pre-established shape to the shapeable region. The method further involves applying axial force in a proximal direction at the anchor region so as to cause the deflection region to deflect relative to the longitudinal axis while the pre-established shape imparted to the shapeable region of the sheath is substantially maintained.
    Type: Application
    Filed: May 27, 2004
    Publication date: November 4, 2004
    Applicant: Cardiac Pacemakers, Inc.
    Inventors: John A. Simpson, Robert C. Hayzelden, Wade A. Bowe
  • Patent number: 6730058
    Abstract: A catheter includes a steering system for manipulating the distal-end region of a sheath having a plurality of electrodes into direct contact with difficult-to-reach areas of the human body. The steering system includes a core base, a core distal tip, a stylet, a steering tendon, and a lever. Movement of the lever applies tension to the steering tendon causing the distal end of the sheath to deflect. A positioning mechanism, including a slidable controller, adjusts the position of the steering system relative to the catheter sheath to thereby provide multiple steering profiles.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: May 4, 2004
    Assignee: Cardiac Pacemakers, Inc.
    Inventor: Robert C. Hayzelden
  • Patent number: 6648875
    Abstract: A catheter handle includes a steering controller to be used in conjunction with a steerable catheter shaft, and a steering tendon tensioning device. The operator deflects the profile of a distal-end region of the catheter by rotating the steering controller. Spring devices located on the steering tendons maintain the steering tendons in tension during manipulation of the steering controller. A locking device locks the steering controller in place relative to the handle.
    Type: Grant
    Filed: May 4, 2001
    Date of Patent: November 18, 2003
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: John A. Simpson, Robert C. Hayzelden
  • Publication number: 20030208198
    Abstract: A catheter includes a steering mechanism for manipulating the distal end of the catheter to obtain a plurality of deflection profiles, a torque transfer system to enhance torque transfer from the handle to the distal tip, and a support system to reduce undesirable deformation of the distal-end region during steering. The torque transfer system includes a flat ribbon within the relatively flexible distal-end region to enhance torque transfer through the distal-end region of the catheter. The support system includes a compression cage and longitudinal struts that are located within the distal-end region of the catheter. The support system can support axial loads and deflect laterally in the direction of the steering, thereby reducing the amount of stretching and compression of the catheter sheath within the deflecting region.
    Type: Application
    Filed: May 28, 2003
    Publication date: November 6, 2003
    Inventors: Robert C. Hayzelden, John A. Simpson, Wade A. Bowe, Andrea M. Moore, Jesse Flores
  • Publication number: 20030181855
    Abstract: A catheter employs a pre-formed distal end and a proximal deflection mechanism for steering the catheter. A shaped member extends from a shaped region of the catheter sheath to at least a portion of an anchor region. A steering ribbon extends from a proximal region of the sheath and passes within at least a portion of the anchor region. A distal end of the steering ribbon is joined with a proximal portion of the shaped member. At least one steering tendon is disposed within the sheath and has a first end attached at the anchor region and a second end located at the proximal region of the sheath. Movement of the steering tendon in a proximal direction causes the deflection region to deflect relative to the longitudinal axis of the catheter while the shape of shaped region of the sheath is substantially maintained.
    Type: Application
    Filed: March 22, 2002
    Publication date: September 25, 2003
    Inventors: John A. Simpson, Robert C. Hayzelden, Wade A. Bowe
  • Patent number: 6616628
    Abstract: A catheter includes a steering tendon and a longitudinally adjustable core having a curved shape in the distal portion thereof. The steering tendon is attached to the distal-end region of the catheter sheath. The proximal end of the core is coupled to a positioning mechanism within the catheter handle and the distal end of the core floats within the catheter sheath. The position of the distal end of the core can be adjusted by advancing or retracting the positioning mechanism within the handle. Axial movement of the steering tendon in the proximal direction causes the distal-end region of the catheter sheath to deflect, while longitudinal adjustment of the curved core changes the deflection profile of the distal-end region of the catheter sheath.
    Type: Grant
    Filed: November 16, 2001
    Date of Patent: September 9, 2003
    Assignee: Cardiac Pacemakers, Inc.
    Inventor: Robert C. Hayzelden
  • Patent number: 6605086
    Abstract: A catheter includes a steering mechanism for manipulating the distal end of the catheter to obtain a plurality of deflection profiles, and a torque transfer system at the distal portion to enhance torque transfer from the handle to the distal tip. The steering mechanism includes two steering tendons. The steering tendons are attached to the distal-end region of the catheter. The steering tendons may be located approximately angularly aligned, thus causing the deflection profiles to be unidirectional. Alternatively, the steering tendons may be located angularly separated from each other, thus causing the deflection profiles to be bidirectional. In other aspects, the torque transfer system includes a flat ribbon within the relatively flexible distal-end region to enhance torque transfer through the distal-end region of the catheter.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: August 12, 2003
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Robert C. Hayzelden, John A. Simpson, Wade A. Bowe, Andrea M. Moore, Jesse Flores
  • Patent number: 6585718
    Abstract: A catheter includes a steering mechanism for manipulating the distal end of the catheter to obtain a plurality of deflection profiles, a torque transfer system to enhance torque transfer from the handle to the distal tip, and a support system to reduce undesirable deformation of the distal-end region during steering. The torque transfer system includes a flat ribbon within the relatively flexible distal-end region to enhance torque transfer through the distal-end region of the catheter. The support system includes a compression cage and longitudinal struts that are located within the distal-end region of the catheter. The support system can support axial loads and deflect laterally in the direction of the steering, thereby reducing the amount of stretching and compression of the catheter sheath within the deflecting region.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: July 1, 2003
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Robert C. Hayzelden, John A. Simpson, Wade A. Bowe, Andrea M. Moore, Jesse Flores
  • Publication number: 20030097128
    Abstract: A catheter includes a steering tendon and a longitudinally adjustable core having a curved shape in the distal portion thereof. The steering tendon is attached to the distal-end region of the catheter sheath. The proximal end of the core is coupled to a positioning mechanism within the catheter handle and the distal end of the core floats within the catheter sheath. The position of the distal end of the core can be adjusted by advancing or retracting the positioning mechanism within the handle. Axial movement of the steering tendon in the proximal direction causes the distal-end region of the catheter sheath to deflect, while longitudinal adjustment of the curved core changes the deflection profile of the distal-end region of the catheter sheath.
    Type: Application
    Filed: November 16, 2001
    Publication date: May 22, 2003
    Inventor: Robert C. Hayzelden
  • Publication number: 20030050598
    Abstract: A catheter includes a steering system for manipulating the distal-end region of a sheath having a plurality of electrodes into direct contact with difficult-to-reach areas of the human body. The steering system includes a core base, a core distal tip, a stylet, a steering tendon, and a lever. Movement of the lever applies tension to the steering tendon causing the distal end of the sheath to deflect. A positioning mechanism, including a slidable controller, adjusts the position of the steering system relative to the catheter sheath to thereby provide multiple steering profiles.
    Type: Application
    Filed: September 13, 2001
    Publication date: March 13, 2003
    Inventor: Robert C. Hayzelden
  • Publication number: 20020165485
    Abstract: A catheter handle includes a steering controller to be used in conjunction with a steerable catheter shaft, and a steering tendon tensioning device. The operator deflects the profile of a distal-end region of the catheter by rotating the steering controller. Spring devices located on the steering tendons maintain the steering tendons in tension during manipulation of the steering controller. A locking device locks the steering controller in place relative to the handle.
    Type: Application
    Filed: May 4, 2001
    Publication date: November 7, 2002
    Inventors: John A. Simpson, Robert C. Hayzelden
  • Publication number: 20020165534
    Abstract: A catheter includes a steering mechanism for manipulating the distal end of the catheter to obtain a plurality of deflection profiles, and a torque transfer system at the distal portion to enhance torque transfer from the handle to the distal tip. The steering mechanism includes two steering tendons. The steering tendons are attached to the distal-end region of the catheter. The steering tendons may be located approximately angularly aligned, thus causing the deflection profiles to be unidirectional. Alternatively, the steering tendons may be located angularly separated from each other, thus causing the deflection profiles to be bidirectional. In other aspects, the torque transfer system includes a flat ribbon within the relatively flexible distal-end region to enhance torque transfer through the distal-end region of the catheter.
    Type: Application
    Filed: May 2, 2001
    Publication date: November 7, 2002
    Inventors: Robert C. Hayzelden, John A. Simpson, Wade A. Bowe, Andrea M. Moore, Jesse Flores
  • Publication number: 20020165461
    Abstract: A catheter includes a steering mechanism for manipulating the distal end of the catheter to obtain a plurality of deflection profiles, a torque transfer system to enhance torque transfer from the handle to the distal tip, and a support system to reduce undesirable deformation of the distal-end region during steering. The torque transfer system includes a flat ribbon within the relatively flexible distal-end region to enhance torque transfer through the distal-end region of the catheter. The support system includes a compression cage and longitudinal struts that are located within the distal-end region of the catheter. The support system can support axial loads and deflect laterally in the direction of the steering, thereby reducing the amount of stretching and compression of the catheter sheath within the deflecting region.
    Type: Application
    Filed: May 2, 2001
    Publication date: November 7, 2002
    Inventors: Robert C. Hayzelden, John A. Simpson, Wade A. Bowe, Andrea M. Moore, Jesse Flores
  • Patent number: 6270496
    Abstract: A catheter has a stylet formed of a shape-retentive and resilient material having a preformed curved shape at its distal end resulting in the catheter sheath having the preformed curved shape. The catheter sheath has a plurality of electrodes at its distal end for contacting selected biological tissue for imparting ablation energy thereto. The catheter sheath also has an axially mounted tendon for causing deflection of the distal end. The stylet material permits straightening the catheter sheath during insertion into the patient and advancing the electrodes to the target tissue. Upon removal of the straightening forces, such as by entry into a chamber of the heart, the stylet material resumes its preformed curved distal shape thereby forcing the catheter distal end with the electrodes into the same preformed curved shape.
    Type: Grant
    Filed: March 1, 2000
    Date of Patent: August 7, 2001
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Wade A. Bowe, Robert C. Hayzelden, John A. Simpson
  • Patent number: 6146381
    Abstract: A catheter having a preformed distal shape for positioning a plurality of electrodes at a selected biological site includes a sheath having a preformed bend in the distal end region to distribute axial forces applied, in the distal direction, to the distal end region over a surface area of the distal end region proximal the distal tip. Also included in the catheter sheath is a stylet formed of a material capable of retaining a shape with the distal end of the stylet shaped in the preformed bend. Preferably, the preformed bend is approximately 45 degrees. Axial forces applied to the catheter are deflected to cause bowing of the catheter so that a larger surface area of the catheter contacts the tissue, rather than the smaller surface area of the distal tip. In other aspects, the portion of the sheath coincident with the preformed bend has a lower durometer, the stylet is more flexible by having a reduced diameter and the electrodes are located proximal to the preformed bend.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: November 14, 2000
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Wade A. Bowe, Robert C. Hayzelden, John A. Simpson
  • Patent number: 6096036
    Abstract: A catheter has a stylet formed of a shape-retentive and resilient material having a preformed curved shape at its distal end resulting in the catheter sheath having the preformed curved shape. The catheter sheath has a plurality of electrodes at its distal end for contacting selected biological tissue for imparting ablation energy thereto. The catheter sheath also has an axially mounted tendon for causing deflection of the distal end. The stylet material permits straightening the catheter sheath during insertion into the patient and advancing the electrodes to the target tissue. Upon removal of the straightening forces, such as by entry into a chamber of the heart, the stylet material resumes its preformed curved distal shape thereby forcing the catheter distal end with the electrodes into the same preformed curved shape.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: August 1, 2000
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Wade A. Bowe, Robert C. Hayzelden, John A. Simpson
  • Patent number: 5741320
    Abstract: A steerable catheter comprising a resilient body member, a manipulation handle attached to the proximal end of the body member, a control wire extending from the handle to the distal end of the catheter for deflection control, and a pulley mechanism for controlling the movement of the control wire. Longitudinal movement of a slide element in the handle causes movement of the control wire and control over the deflection of the distal end of the catheter. The pulley mechanism is connected between the slide element and the control wire to provide greater mechanical advantage to effect deflection of the body member while enhancing deflection control resolution. A stiffening member is also disposed in the catheter body member and its position is controlled by the rotational motion of the slide element. The position of the pulley mechanism is not affected by rotational motion of the slide element.
    Type: Grant
    Filed: May 2, 1995
    Date of Patent: April 21, 1998
    Assignee: Heart Rhythm Technologies, Inc.
    Inventors: Peter Thornton, Tracy D. Maahs, Robert C. Hayzelden, Miriam H. Taimisto
  • Patent number: 5606974
    Abstract: A catheter includes a piezoelectric transducer mounted to the distal end of a catheter. In one embodiment, the piezoelectric transducer has the shape of a cylinder and in another embodiment, a convex shape with a mounting flange. In the cylindrical shape, a plurality of surface mounted temperature sensors are disposed within the piezoelectric transducer. The sensors are electrically insulated and a sealing technique prevents the leakage of body fluids from penetrating the interior of the catheter through the sensor bores. The cylindrical transducer is supported on mounting members so that it is accurately mounted and sealed while at the same time, the material used does not significantly dampen the transducer. The convex shape includes a temperature sensor at its tip.
    Type: Grant
    Filed: May 2, 1995
    Date of Patent: March 4, 1997
    Assignee: Heart Rhythm Technologies, Inc.
    Inventors: Thomas M. Castellano, Robert C. Hayzelden, Tracy D. Maahs