Patents Assigned to St. Jude Medical AB
  • Patent number: 10249180
    Abstract: An implantable medical device has a broadband RF receiver operating within an RF band and having stored information of a characteristic receiver frequency representing the RF within the RF band at which the broadband RF receiver has sufficient receiver sensitivity. The stored information is retrieved in response to a message from an external communication device and is included in a response generated by the implantable medical device and transmitted to the communication device. The information enables the communication device to select its transmission frequency at a subsequent transmission instance to the relevant implantable medical device. The chances of successful reception at the subsequent transmission instance are thereby increased.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: April 2, 2019
    Assignee: ST. JUDE MEDICAL AB
    Inventor: Hans Abrahamson
  • Patent number: 9814888
    Abstract: Systems and methods for optimizing the stimulation of a heart of a patient are disclosed herein. The method comprises delivering pacing therapy to the patient according to a pacing therapy setting schedule, using specific pacing intervals via specific electrode configurations. Further, sinus rate values are recorded over at least one cardiac cycle at each pacing therapy setting and it is determined whether a sinus rate value satisfies predetermined measurement conditions, wherein sinus rate values are used for trending the sinus rate over time if the measurement conditions are satisfied. The accepted sinus rate values, i.e. values that satisfy the measurement conditions, are trended over time, wherein each trended sinus rate value is created based on recordings from at least one cardiac cycle. A preferred pacing therapy setting is determined to be the pacing therapy setting that provides a lowest sinus rate.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: November 14, 2017
    Assignee: St. Jude Medical, AB
    Inventors: Nils Holmstrom, Andreas Karlsson
  • Patent number: 9750947
    Abstract: A non-implantable communication unit conducts wireless communication with an implantable medical device (IMD). The communication unit comprises a request processor for generating power down requests destined to the IMD and triggering temporary power down of the IMD radio equipment. When the communication unit receives a data packet from the IMD or a connected programmer it determines the size of the data packet. A timer processor sets a timer to a value defined based on the determined size. A processor controller selectively controls the operation of request processor to generate or stop generating the power down requests based on a current value of the timer. Power down of the IMD radio equipment is thereby prevented if it is likely that the IMD comprises data to transmit to the communication unit as predicted based on data packet sizes.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: September 5, 2017
    Assignee: St. Jude Medical AB
    Inventor: Par Edlund
  • Patent number: 9704385
    Abstract: An implantable medical device has a broadband RF receiver operating within an RF band and having stored information of a characteristic receiver frequency representing the RF within the RF band at which the broadband RF receiver has sufficient receiver sensitivity. The stored information is retrieved in response to a message from an external communication device and is included in a response generated by the implantable medical device and transmitted to the communication device. The information enables the communication device to select its transmission frequency at a subsequent transmission instance to the relevant implantable medical device. The chances of successful reception at the subsequent transmission instance are thereby increased.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: July 11, 2017
    Assignee: ST. JUDE MEDICAL AB
    Inventor: Hans Abrahamson
  • Patent number: 9549674
    Abstract: An implantable medical device applies an electric signal to at least a portion of a heart in a subject. A resulting electric signal is collected from the heart and is used together with the applied signal for determining a cardiogenic impedance signal. The impedance signal is processed in order to estimate an isovolumetric contraction time, an isovolumetric relaxation time and an ejection time for a heart cycle. These three time parameters are employed for calculating a Tei-index of the heart. The Tei-index can be used as myocardial performance parameter in heart diagnosis and/or cardiac therapy adjustment.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: January 24, 2017
    Assignee: ST. JUDE MEDICAL AB
    Inventors: Michael Broome, Andreas Blomqvist
  • Patent number: 9522275
    Abstract: Methods and systems for optimizing stimulation of a heart of a patient are disclosed. The method comprises: determining recommended pacing settings including recommended AV delays and/or recommended VV delays based on IEGM data. Further, at least one hemodynamical parameter is determined based on measured at least one hemodynamical signal. Reference pacing settings are determined including reference AV delays and/or reference VV delays based on said hemodynamical parameters. An AV delay correction value and a VV delay correction value are calculated as a difference between recommended AV and/or VV delays and reference AV and/or VV delays, respectively. The correction values are used for updating recommended AV and/or VV delays, respectively.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: December 20, 2016
    Assignee: St. Jude Medical AB
    Inventors: Andreas Blomqvist, Torbjorn Persson, Rolf Hill
  • Patent number: 9436801
    Abstract: A patient-specific hemodyanmic status model is determined from impedance data collected during periods of normal and abnormal hemodynamic status by deriving parameter values of a set of multiple impedance-derivable parameters from impedance signals collected during periods of normal hemodynamic status and in connection with periods of abnormal hemodynamic status. The parameter values are employed to estimate coefficients of a linear parametric status model. These coefficients can then be used together with parameter values determined from impedance signals determined during status assessment periods in order to determine a current hemdoynamic status of the patient.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: September 6, 2016
    Assignee: St. Jude Medical AB
    Inventors: Karin Jarverud, Anders Bjorling, Malin Hollmark, Kjell Noren, Tomas Svensson, Stefan Hjelm
  • Patent number: 9351656
    Abstract: An implantable medical device has an impedance processor for determining atrial impedance data reflective of the cardiogenic impedance of an atrium of a heart during diastole and/or systole of heart cycle. Ventricular impedance data reflective of the cardiogenic impedance of a ventricle during diastole and/or systole are also determined. The determined impedance data are processed by a representation processor for estimating a diastolic and/or a systolic atrial impedance representation and a diastolic and/or a systolic ventricular impedance representation. A condition processor determines the presence of any heart valve malfunction, such as valve regurgitation and/or stenosis, of at least one heart valve based on the estimated atrial and ventricular impedance representations.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: May 31, 2016
    Assignee: ST. JUDE MEDICAL AB
    Inventors: Karin Jarverud, Andreas Blomqvist
  • Patent number: 9345417
    Abstract: An implantable medical device has an impedance processor for determining atrial impedance data reflective of the cardiogenic impedance of an atrium of a heart during diastole and/or systole of heart cycle. Ventricular impedance data reflective of the cardiogenic impedance of a ventricle during diastole and/or systole are also determined. The determined impedance data are processed by a representation processor for estimating a diastolic and/or a systolic atrial impedance representation and a diastolic and/or a systolic ventricular impedance representation. A condition processor determines the presence of any heart valve malfunction, such as valve regurgitation and/or stenosis, of at least one heart valve based on the estimated atrial and ventricular impedance representations.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: May 24, 2016
    Assignee: ST. JUDE MEDICAL AB
    Inventors: Karin Jarverud, Andreas Blomqvist
  • Patent number: 9339232
    Abstract: A lead has a helix at a distal end of a rotatable shaft. Prior to implantation of the lead, the helix has a first configuration comprising an electrically active surface coated with an electrically insulative layer of a biologically dissolvable material to render the helix electrically inactive. Upon fixation of the helix into an organ, the helix has the first configuration and a pin is in electrical contact with the organ to detect proper fixation of the helix into the organ. Subsequent to fixation of the helix into the organ, the helix has a second configuration comprising an electrically active surface exposed upon dissolving of the electrically insulative layer of the biologically dissolvable material to render the helix electrically active.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: May 17, 2016
    Assignee: ST. JUDE MEDICAL AB
    Inventors: Sara Hallander, Marcus Helgesson
  • Patent number: 9339233
    Abstract: A lead has an electrically controlled switch at a proximal end of a rotatable shaft. The electrically controlled switch has a first configuration to electrically connect a first electric conductor to a second electric conductor for electrically activating the pin and has a second configuration to electrically connect the first electric conductor to the rotatable shaft for electrically activating the helix. Proper fixation of the helix to an organ is determined by switching the electrically controlled switch to the first configuration to render the pin electrically active and to electrically deactivate the helix. Upon determination of proper fixation of the helix to the organ, the electrically controlled switch is switched to the second configuration to render the helix electrically active and to electrically deactivate the pin.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: May 17, 2016
    Assignee: ST. JUDE MEDICAL AB
    Inventors: Sara Hallander, Marcus Helgesson
  • Patent number: 9295833
    Abstract: An implantable lead for sensing mechanical activity of a human heart has an insulating polymeric tube extending from a proximal end to a distal end of the lead, an electrical conductor provided in the lumen of the polymeric tube, and a sensor connected to the conductor at the distal end thereof. The polymeric tube is provided with a conductive surface layer along the inner face between the polymeric tube and the electrical conductor, the conductive surface layer being in electrical contact with this conductor. Accumulation of electrical charges between the electric conductor and the polymeric tube is thereby prevented.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: March 29, 2016
    Assignee: St. Jude Medical, AB
    Inventors: Kenth Nilsson, Anna-Karin Johansson, Tom Eriksson
  • Patent number: 9283395
    Abstract: An implantable medical device, IMD, comprises atrial and ventricular sensing units for sensing atrial or ventricular electric events. The IMD also comprises atrial and ventricular pulse generators for generating atrial or ventricular pacing pulses. A controller controls the operation of the IMD (100) according to a first mode, in which the ventricular pulse generator is prevented from generating a back-up pulse if an evoked response detector fails to detect evoked response to a delivered ventricular pacing pulse, and a second mode, in which the ventricular pulse generator is controlled to generate a back-up pulse if no evoked response is detected following delivery of a ventricular stimulating pulse. The controller switches operation from the first mode to the second mode based on the evoked response detector failing to detect an evoked response to a delivered ventricular pacing pulse.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: March 15, 2016
    Assignee: ST. JUDE MEDICAL AB
    Inventor: Johan Eckerdal
  • Patent number: 9277886
    Abstract: An implantable medical device has an impedance processor that determines impedance data reflective of the transvalvular impedance of a heart valve of a heart during a heart cycle. The determined impedance data are processed by a representation processor that estimates diastolic and systolic transvalvular impedance representations. A condition processor determines the presence of any heart valve malfunction, such as valve regurgitation and/or stenosis, of the heart valve based on the estimated diastolic and systolic transvalvular impedance representations.
    Type: Grant
    Filed: July 13, 2015
    Date of Patent: March 8, 2016
    Assignee: ST. JUDE MEDICAL AB
    Inventors: Andreas Blomqvist, Karin Jarverud
  • Patent number: 9241653
    Abstract: An implantable medical device applies an electric signal to at least a portion of a heart in a subject. A resulting electric signal is collected from the heart and is used together with the applied signal for determining a cardiogenic impedance signal. The impedance signal is processed in order to estimate an isovolumetric contraction time, an isovolumetric relaxation time and an ejection time for a heart cycle. These three time parameters are employed for calculating a Tei-index of the heart. The Tei-index can be used as myocardial performance parameter in heart diagnosis and/or cardiac therapy adjustment.
    Type: Grant
    Filed: August 28, 2008
    Date of Patent: January 26, 2016
    Assignee: ST. JUDE MEDICAL AB
    Inventors: Michael Broomé, Andreas Blomqvist
  • Patent number: 9192771
    Abstract: In an implantable medical device and a method for assembly thereof, a hermetically sealed housing encloses electronic circuitry and has a housing fastener part that is formed of metal and that protrudes from the housing. A per-fabricated header, for receiving conducting leads and for connecting the conducting leads to the electronic circuitry, has a header fastener part also formed of metal. The header is fastened to the housing by metal-to-metal welding of the housing fastener part and the header fastener part at a distance from the housing.
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: November 24, 2015
    Assignee: ST JUDE MEDICAL AB
    Inventor: Johan Sjöstedt
  • Patent number: 9162066
    Abstract: A first ventricle is stimulated at a stimulation site, a point of time for arrival at the AV node for at least one depolarization wave resulting from the stimulation is estimated and a first activation time interval substantially corresponding to the time interval required for at least one depolarization wave to travel from the stimulation site in the first ventricle to the AV node is computed. A similar process is used to compute a second activation time interval for the other ventricle. Based on these activation time intervals and a difference between the intervals, a pacing therapy can be determined.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: October 20, 2015
    Assignee: ST. JUDE MEDICAL AB
    Inventors: Sven-Erik Hedberg, Nils Holmstrom, Karin Jarverud
  • Patent number: 9138583
    Abstract: Systems and methods for optimizing the stimulation of a heart of a patient are disclosed herein. The method comprises delivering pacing therapy to the patient according to a pacing therapy setting schedule, using specific pacing intervals via specific electrode configurations. Further, sinus rate values are recorded over at least one cardiac cycle at each pacing therapy setting and it is determined whether a sinus rate value satisfies predetermined measurement conditions, wherein sinus rate values are used for trending the sinus rate over time if the measurement conditions are satisfied. The accepted sinus rate values, i.e. values that satisfy the measurement conditions, are trended over time, wherein each trended sinus rate value is created based on recordings from at least one cardiac cycle. A preferred pacing therapy setting is determined to be the pacing therapy setting that provides a lowest sinus rate.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: September 22, 2015
    Assignee: ST. JUDE MEDICAL AB
    Inventors: Nils Holmstrom, Andreas Karlsson
  • Patent number: 9119545
    Abstract: An implantable medical device, is designed to collect a signal representative of the electric activity of the heart and determine a cardiogenic impedance signal for at least a portion of the heart. An R-wave detector of the IMD detects the timing of an R-wave during a cardiac cycle based on the signal representative of the electric activity. A minimum detector detects the timing of a cardiogenic impedance minimum in the cardiogenic impedance signal and within a systolic time window of the cardiac cycle. A detected arrhythmia is then classified by the IMD based on the timing of the R-wave detected by the R-wave detector and the timing of the cardiogenic impedance minimum detected by the minimum detector.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: September 1, 2015
    Assignee: St. Jude Medical, AB
    Inventors: Anders Bjorling, Malin Hollmark, Tomas Svensson, Stefan Hjelm, Kjell Noren, Karin Jarverud
  • Patent number: 9114251
    Abstract: A medical implantable lead of the type being adapted to be implanted into a human or animal body and attached with a distal end to an organ inside the body, has a helix of a helical wire in the distal end which is adapted to be screwed into the organ. In addition to the first helix, the lead also has a second helix of a helical wire, the second helix having the same diameter, the same pitch and being intertwined with the helical wire of the first helix and which, upon rotation of the first helix, will be rotated and screwed into the tissue. The first helix is electrically non-conductive whereas the second helix is electrically conductive. In a method for attaching a medical implantable lead to an organ inside a human or animal body, such a medical lead is employed and fixed to tissue in vivo.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: August 25, 2015
    Assignee: St. Jude Medical AB
    Inventors: Rolf Hill, Olof Stegfeldt