Patents by Inventor Volkert A. Zeijlemaker

Volkert A. Zeijlemaker 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: 9549688
    Abstract: A detection unit and a method for detecting an implanted medical device in an MRI environment employ a telemetry transmission from the implanted medical device.
    Type: Grant
    Filed: April 24, 2006
    Date of Patent: January 24, 2017
    Assignee: Medtronic, Inc.
    Inventor: Volkert A. Zeijlemaker
  • Patent number: 9020610
    Abstract: Electrode systems that may be used with implantable medical devices such as a pacemaker, in addition to one or more conventional electrodes, include a shunt electrode. Under ordinary conditions, the shunt electrode has very little effect upon the operation of the electrode system. When high frequency current is delivered to the electrode system, however, the electrode system shunts a large share of the high frequency current to the shunt electrode. The shunt electrode, which includes a conducting material surrounded by an insulating layer, dissipates heat that may be caused by the high frequency current.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: April 28, 2015
    Assignee: Medtronic, Inc.
    Inventor: Volkert A. Zeijlemaker
  • Publication number: 20150080977
    Abstract: An implantable medical device may include a telemetry module, a sensing module, a therapy delivery module, and a processor. The processor may be configured to detect a patient event based on data generated by the sensing module, operate the IMD in a first mode in which the telemetry module is disabled and the therapy delivery module is at least partially disabled when the patient event is not detected, and operate the IMD in a second mode in which the telemetry module is enabled and the therapy delivery module is at least partially disabled when the patient event is detected. In some examples, the processor is configured to, in the second mode, generate a notification of the cardiac arrhythmia and transmit the notification to an external device via the telemetry module. The external device may reside inside an MRI room or outside the MRI room, and may communicate with other devices.
    Type: Application
    Filed: November 26, 2014
    Publication date: March 19, 2015
    Inventors: Christopher C. STANCER, Volkert A. ZEIJLEMAKER
  • Patent number: 8929995
    Abstract: An implantable medical device may include a telemetry module, a sensing module, a therapy delivery module, and a processor. The processor may be configured to detect a patient event based on data generated by the sensing module, operate the IMD in a first mode in which the telemetry module is disabled and the therapy delivery module is at least partially disabled when the patient event is not detected, and operate the IMD in a second mode in which the telemetry module is enabled and the therapy delivery module is at least partially disabled when the patient event is detected. In some examples, the processor is configured to, in the second mode, generate a notification of the cardiac arrhythmia and transmit the notification to an external device via the telemetry module. The external device may reside inside an MRI room or outside the MRI room, and may communicate with other devices.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: January 6, 2015
    Assignee: Medtronic, Inc.
    Inventors: Christopher C. Stancer, Volkert A. Zeijlemaker
  • Patent number: 8818489
    Abstract: A medical device includes a sensor for sensing for an MRI gradient magnetic field and a microprocessor configured to operate in a signal processing mode in which electrical signals induced by the gradient magnetic field are not counted as cardiac events.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: August 26, 2014
    Assignee: Medtronic, Inc.
    Inventor: Volkert A Zeijlemaker
  • Patent number: 8761881
    Abstract: Polarization signals, which represent voltages measured at a pacemaker electrode, are not constant and may drift. Polarization signal drift, which often precedes undesirable pace polarization artifacts, is more significant when the pacemaker is inhibited from providing an electrical stimulation to the patient's heart. The present invention provides an implantable system and methods for stabilization of a polarization signal. Electrical pulses may be applied to stabilize a polarization signal. In one implementation of the invention, polarization signal stabilization may be used as part of process to terminate tachycardia.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: June 24, 2014
    Assignee: Medtronic, Inc.
    Inventors: Bernardus F. M. Vonk, Gustaaf A. P. Stoop, Volkert Zeijlemaker
  • Patent number: 8412351
    Abstract: An implantable medical device (IMD) can include a cardiac pacemaker or an implantable cardiac defibrillator (ICD). Various portions of the IMD, such as a case or device body, the lead body, or the lead tip, can be provided to reduce or dissipate a heat production due to a current induced by various external environmental factors. According to various embodiments, features or portions can be incorporated into the lead body, the lead tip, or the IMD body to reduce the creation of an induced current, or dissipate or increase the area of dissipation of thermal energy created due to an induced current in the lead.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: April 2, 2013
    Assignee: Medtronic, Inc.
    Inventors: Volkert A. Zeijlemaker, Nicolaas M. Lokhoff
  • Publication number: 20120316427
    Abstract: The disclosure is directed to techniques in which magnetic resonance imaging (MRI) is coordinated with the operation of an implantable medical device (IMD). By using an IMD to sense conditions, MRI can be improved because the sensed conditions can accurately define timing for application of electromagnetic radiation bursts. Moreover, by applying stimulation pulses specifically to coordinate the electromagnetic radiation bursts, the MRI may also be improved.
    Type: Application
    Filed: August 22, 2012
    Publication date: December 13, 2012
    Inventors: Volkert A. Zeijlemaker, Steven D. Goedeke
  • Patent number: 8332011
    Abstract: The invention is directed to structure and methods for coordinating the operation of an implantable medical device (IMD) with magnetic resonance imaging (MRI) techniques. For example the IMD can be made to activate a blanking period during the time when the electromagnetic radiation bursts occur. Blanking an IMD at times when MRI electromagnetic radiation bursts occur can prevent an undesirable action or incorrect sensing by the IMD while under the influence of the electromagnetic radiation bursts.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: December 11, 2012
    Assignee: Medtronic, Inc.
    Inventor: Volkert A. Zeijlemaker
  • Publication number: 20120265263
    Abstract: A medical device includes a sensor for sensing for an MRI gradient magnetic field and a microprocessor configured to operate in a signal processing mode in which electrical signals induced by the gradient magnetic field are not counted as cardiac events.
    Type: Application
    Filed: June 25, 2012
    Publication date: October 18, 2012
    Inventor: Volkert A. Zeijlemaker
  • Patent number: 8275444
    Abstract: The disclosure is directed to techniques in which magnetic resonance imaging (MRI) is coordinated with the operation of an implantable medical device (IMD). By using an IMD to sense conditions, MRI can be improved because the sensed conditions can accurately define timing for application of electromagnetic radiation bursts. Moreover, by applying stimulation pulses specifically to coordinate the electromagnetic radiation bursts, the MRI may also be improved.
    Type: Grant
    Filed: December 29, 2009
    Date of Patent: September 25, 2012
    Assignee: Medtronic, Inc.
    Inventors: Volkert A. Zeijlemaker, Steven D. Goedeke
  • Patent number: 8260418
    Abstract: Upon delivery of a pacing pulse to a heart by an electrode of an implantable medical device (IMD), a deleterious pace polarization artifact is generally created at the electrode-tissue interface and subsequently stored by the electrode. Such polarization artifact is generally minimized through the use of passive recharge circuitry. Such passive recharge circuitry functions in creating a recharge pulse at the electrode which in essence, minimizes the polarization artifact on the electrode. In order to produce further artifact minimization from a subsequent pacing pulse, following termination of the recharge pulse, any remaining polarization artifact is sampled and analyzed by the IMD and IMD software optionally compensates the next recharge pulse to further minimize the polarization artifact generated by a next pacing pulse. This sampling and optional compensation is repeated for subsequent pacing pulses so that polarization artifacts are effectively analyzed and if necessary, minimized.
    Type: Grant
    Filed: August 6, 2009
    Date of Patent: September 4, 2012
    Assignee: Medtronic, Inc.
    Inventor: Volkert A. Zeijlemaker
  • Publication number: 20120197366
    Abstract: A medical lead and a method of making the medical lead, the medical lead having a proximal end for electrical connection to a medical device and a distal end implantable proximate a target tissue. The lead includes a conductor and a sheath disposed over the conductor, the sheath comprising a polymer and a filler mixed in the polymer. The filler has a dielectric constant that is different from a dielectric constant of the polymer. The weight percentage of the filler in the sheath is selected such that energy induced by an external disruptive energy field in the conductor that is absorbed by the target tissue proximate the distal end of the lead is below a predetermined threshold energy.
    Type: Application
    Filed: February 28, 2011
    Publication date: August 2, 2012
    Applicant: MEDTRONIC, INC.
    Inventors: Volkert A. Zeijlemaker, Edze J. Tijsma
  • Patent number: 8229543
    Abstract: A medical device includes a sensor for sensing for an MRI gradient magnetic field and a microprocessor configured to operate in a signal processing mode in which electrical signals induced by the gradient magnetic field are not counted as cardiac events.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: July 24, 2012
    Assignee: Medtronic, Inc.
    Inventor: Volkert A. Zeijlemaker
  • Publication number: 20120109260
    Abstract: An implantable medical device may include a telemetry module, a sensing module, a therapy delivery module, and a processor. The processor may be configured to detect a patient event based on data generated by the sensing module, operate the IMD in a first mode in which the telemetry module is disabled and the therapy delivery module is at least partially disabled when the patient event is not detected, and operate the IMD in a second mode in which the telemetry module is enabled and the therapy delivery module is at least partially disabled when the patient event is detected. In some examples, the processor is configured to, in the second mode, generate a notification of the cardiac arrhythmia and transmit the notification to an external device via the telemetry module. The external device may reside inside an MRI room or outside the MRI room, and may communicate with other devices.
    Type: Application
    Filed: October 29, 2010
    Publication date: May 3, 2012
    Applicant: Medtronic, Inc.
    Inventors: Christopher C. Stancer, Volkert A. Zeijlemaker
  • Publication number: 20120010676
    Abstract: A medical device includes a sensor for sensing for an MRI gradient magnetic field and a microprocessor configured to operate in a signal processing mode in which electrical signals induced by the gradient magnetic field are not counted as cardiac events.
    Type: Application
    Filed: September 21, 2011
    Publication date: January 12, 2012
    Inventor: VOLKERT A. ZEIJLEMAKER
  • Patent number: 8041410
    Abstract: A medical device includes a sensor for sensing for an MRI gradient magnetic field and a microprocessor for responding to the detected gradient magnetic field by switching from a first electrical signal processing mode to a second electrical signal processing mode, such that electrical signals induced by the gradient magnetic field and an associated RF burst are not counted as cardiac events.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: October 18, 2011
    Assignee: Medtronic, Inc.
    Inventor: Volkert A. Zeijlemaker
  • Publication number: 20100152805
    Abstract: A medical device includes a sensor for sensing for an MRI gradient magnetic field and a microprocessor for responding to the detected gradient magnetic field by switching from a first electrical signal processing mode to a second electrical signal processing mode, such that electrical signals induced by the gradient magnetic field and an associated RF burst are not counted as cardiac events.
    Type: Application
    Filed: February 25, 2010
    Publication date: June 17, 2010
    Inventor: Volkert A. Zeijlemaker
  • Publication number: 20100106006
    Abstract: The disclosure is directed to techniques in which magnetic resonance imaging (MRI) is coordinated with the operation of an implantable medical device (IMD). By using an IMD to sense conditions, MRI can be improved because the sensed conditions can accurately define timing for application of electromagnetic radiation bursts. Moreover, by applying stimulation pulses specifically to coordinate the electromagnetic radiation bursts, the MRI may also be improved.
    Type: Application
    Filed: December 29, 2009
    Publication date: April 29, 2010
    Inventors: Volkert A. Zeijlemaker, Steven D. Goedeke
  • Patent number: 7693568
    Abstract: A medical device includes a sensor for sensing for an MRI gradient magnetic field and a microprocessor for responding to the detected gradient magnetic field by switching from a first electrical signal processing mode to a second electrical signal processing mode, such that electrical signals induced by the gradient magnetic field and an associated RF burst are not counted as cardiac events.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: April 6, 2010
    Assignee: Medtronic, Inc.
    Inventor: Volkert A. Zeijlemaker