Patents by Inventor Spencer R. Hurd

Spencer R. Hurd 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).

  • Methods and apparatus for cardiac R-wave sensing in a subcutaneous ECG waveform
    Patent number: 7027858
    Abstract: The present invention uses a R-wave sensing algorithm that uniquely combines an automatic threshold adjustment method with a new noise rejection technique. This algorithm has significant advantages in avoiding the sensing of T-waves, P-waves, and noise/artifacts. Detecting the presence of noise bursts uses features that determine if an R-R interval adjacent to or within the noise signal is valid. Circuitry that discriminates noise signals from R-waves can use any one of several features including, but not limited to, the following: detection events occurring so close together that they are outside normal physiologic heart rates; frequency content that is wider than that of QRS complexes; amplitudes that are different than the adjacent or encompassing R-waves; and amplitudes that display greater than normal variability.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: April 11, 2006
    Assignee: Medtronic, Inc.
    Inventors: Jian Cao, Lee B. Brian, Michael R. Kane, Spencer R. Hurd
  • Methods and apparatus for cardiac R-wave sensing in a subcutaneous ECG waveform
    Publication number: 20040049120
    Abstract: The present invention uses a R-wave sensing algorithm that uniquely combines an automatic threshold adjustment method with a new noise rejection technique. This algorithm has significant advantages in avoiding the sensing of T-waves, P-waves, and noise/artifacts. Detecting the presence of noise bursts uses features that determine if an R-R interval adjacent to or within the noise signal is valid. Circuitry that discriminates noise signals from R-waves can use any one of several features including, but not limited to, the following: detection events occurring so close together that they are outside normal physiologic heart rates; frequency content that is wider than that of QRS complexes; amplitudes that are different than the adjacent or encompassing R-waves; and amplitudes that display greater than normal variability.
    Type: Application
    Filed: September 11, 2002
    Publication date: March 11, 2004
    Inventors: Jian Cao, Lee B. Brian, Michael R. Kane, Spencer R. Hurd
  • Implantable medical device with multi-vector sensing electrodes
    Patent number: 6699200
    Abstract: A medical device for multi-vector sensing of cardiac depolarization signals is disclosed. Specialized algorithm is implemented to enhance multi-vector electrode sensing. Further a geometric shape is optimized to enable space-volume efficiencies for deployment and navigation of the medical device for implant in a patient.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: March 2, 2004
    Assignee: Medtronic, Inc.
    Inventors: Jian Cao, Brian B. Lee, Spencer R. Hurd
  • Implantable medical device with multi-vector sensing electrodes
    Publication number: 20010034487
    Abstract: A medical device for multi-vector sensing of cardiac depolarization signals is disclosed. Specialized algorithm is implemented to enhance multi-vector electrode sensing. Further a geometric shape is optimized to enable space-volume efficiencies for deployment and navigation of the medical device for implant in a patient.
    Type: Application
    Filed: March 1, 2001
    Publication date: October 25, 2001
    Inventors: Jian Cao, Brian B. Lee, Spencer R. Hurd