Patents by Inventor Zachary Doyle Walton

Zachary Doyle Walton 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).

  • Systems and Methods Utilizing Plethysmographic Data for Distinguishing Arterial and Venous Oxygen Saturations
    Publication number: 20150182172
    Abstract: Apparatus, systems and methods are provided for using the PG waveform to determine peripheral venous and arterial saturations. Generally, saturations are determined by isolating an indicator of venous or arterial blood volume in each of a plurality of PG waveforms and using the isolated indicators to determine saturation in the corresponding region of the vasculature. Indicators may include respiratory induced variations of AC and/or DC components of the PG waveforms, peaks of the PG waveforms, troughs of the PG waveforms, venous pulsations of the PG waveforms, etc. Indicators may further be isolated in either the time or frequency domain. The isolated indicators may advantageously be normalized, e.g., based on a baseline of the PG waveform or a derivative thereof.
    Type: Application
    Filed: December 3, 2014
    Publication date: July 2, 2015
    Applicant: YALE UNIVERSITY
    Inventors: Kirk H. Shelley, David G. Silverman, Zachary Doyle Walton
  • Systems and Methods Utilizing Plethysmographic Data for Distinguishing Arterial and Venous Saturations
    Publication number: 20120150002
    Abstract: Apparatus, systems and methods are provided for using the PG waveform to determine peripheral venous and arterial saturations. Generally, saturations are determined by isolating an indicator of venous or arterial blood volume in each of a plurality of PG waveforms and using the isolated indicators to determine saturation in the corresponding region of the vasculature. Indicators may include respiratory induced variations of AC and/or DC components of the PG waveforms, peaks of the PG waveforms, troughs of the PG waveforms, venous pulsations of the PG waveforms, etc. Indicators may further be isolated in either the time or frequency domain. The isolated indicators may advantageously be normalized, e.g., based on a baseline of the PG waveform or a derivative thereof.
    Type: Application
    Filed: June 15, 2010
    Publication date: June 14, 2012
    Applicant: YALE UNIVERSITY
    Inventors: Kirk H. Shelley, David G. Silverman, Zachary Doyle Walton