Patents by Inventor David M. Schreck

David M. Schreck 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).

  • Publication number: 20210145257
    Abstract: A modular endoscope including a handle and sheath that may be coupled or uncoupled. The tip of the sheath distal from the location where it is coupled to the handle includes an illumination element, an image capture element and a deflection element, allowing the distal tip to be pointed in a selected direction.
    Type: Application
    Filed: August 17, 2017
    Publication date: May 20, 2021
    Inventor: David M. Schreck
  • Patent number: 10602946
    Abstract: A mobile cardiac monitoring device is disclosed. The mobile cardiac monitoring device receives voltage-time measurements of a subset of electrocardiogram (ECG) leads for a user, and derives a full set of ECG leads from the voltage-time measurements of the subset of ECG leads. The mobile cardiac monitoring device calculates a heart rate and monitors the cardiac rhythm of the user based on at least one of the subset of ECG leads and calculates a cardiac electrical biomarker (CEB) based on the derived ECG. The mobile cardiac device detects a trigger condition based on the calculated CEB and transmits an alert in response to detecting the trigger condition.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: March 31, 2020
    Assignee: VectraCor, Inc.
    Inventors: David M. Schreck, Brad S. Schreck, Andrew J. Schreck, Michael G. Van Laar
  • Publication number: 20170188861
    Abstract: A mobile cardiac monitoring device is disclosed. The mobile cardiac monitoring device receives voltage-time measurements of a subset of electrocardiogram (ECG) leads for a user, and derives a full set of ECG leads from the voltage-time measurements of the subset of ECG leads. The mobile cardiac monitoring device calculates a heart rate and monitors the cardiac rhythm of the user based on at least one of the subset of ECG leads and calculates a cardiac electrical biomarker (CEB) based on the derived ECG. The mobile cardiac device detects a trigger condition based on the calculated CEB and transmits an alert in response to detecting the trigger condition.
    Type: Application
    Filed: December 30, 2015
    Publication date: July 6, 2017
    Inventors: David M. Schreck, Brad S. Schreck, Andrew J. Schreck, Michael G. Van Laar
  • Patent number: 6920349
    Abstract: The onset of cardiac pathology can be predicted by first acquiring a plurality of lead values as a function of time for set of electrocardiogram leads and defining a spatial curve from the lead values for at least three leads. A fractal index for the spatial curve is calculated as a function of time and the time rate of change of the fractal index is monitored. A negative time rate of change is indicative of normal cardiac activity, while a positive time rate of change is indicative of pathological cardiac activity.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: July 19, 2005
    Inventor: David M. Schreck
  • Patent number: 6901285
    Abstract: A method for synthesizing electrocardiogram leads includes obtaining a sequence of voltage-time measurements for a set of electrocardiogram leads and subjecting the measurements to abstract factor analysis to obtain a set of eigenvalues and associated eigenvectors. A minimal subset of electrocardiogram leads is identified from which the voltage-time measurements can be calculated with acceptable error. Simplex optimization is performed on a subset of the voltage-time measurements measured with the minimal subset of electrocardiogram leads to obtain a universal transformation matrix, and the universal transformation matrix is multiplied by the subset of the voltage-time measurements to calculate the full set of voltage-time measurements. The full set of leads can be used to calculate a body surface map, and the eigenvalues can be tracked in time to predict the onset of pathology such as myocardial infarction.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: May 31, 2005
    Inventor: David M. Schreck
  • Publication number: 20040002661
    Abstract: The onset of cardiac pathology can be predicted by first acquiring a plurality of lead values as a function of time for set of electrocardiogram leads and defining a spatial curve from the lead values for at least three leads. A fractal index for the spatial curve is calculated as a function of time and the time rate of change of the fractal index is monitored. A negative time rate of change is indicative of normal cardiac activity, while a positive time rate of change is indicative of pathological cardiac activity.
    Type: Application
    Filed: July 1, 2002
    Publication date: January 1, 2004
    Inventor: David M. Schreck
  • Publication number: 20030216655
    Abstract: A method for synthesizing electrocardiogram leads includes obtaining a sequence of voltage-time measurements for a set of electrocardiogram leads and subjecting the measurements to abstract factor analysis to obtain a set of eigenvalues and associated eigenvectors. A minimal subset of electrocardiogram leads is identified from which the voltage-time measurements can be calculated with acceptable error. Simplex optimization is performed on a subset of the voltage-time measurements measured with the minimal subset of electrocardiogram leads to obtain a universal transformation matrix, and the universal transformation matrix is multiplied by the subset of the voltage-time measurements to calculate the full set of voltage-time measurements. The full set of leads can be used to calculate a body surface map, and the eigenvalues can be tracked in time to predict the onset of pathology such as myocardial infarction.
    Type: Application
    Filed: May 17, 2002
    Publication date: November 20, 2003
    Inventor: David M. Schreck
  • Patent number: 4411655
    Abstract: An apparatus for percutaneous catheterization of a vascular or other body compartment employs a shape memory alloy cylindrical cannula which expands after introduction into the body compartment with sufficient radial force to dilate the vascular member. A cylindrical plastic sheath embracing the cannula facilitates introduction and insulates the vascular compartment from contact with the metal of the cannula.
    Type: Grant
    Filed: November 30, 1981
    Date of Patent: October 25, 1983
    Inventor: David M. Schreck