Worcester Polytechnic Institute Electronic Theses and Dissertations Collection

Title page for ETD etd-073106-130906

Document Typethesis
Author NameJohnston, William S.
TitleDevelopment of a Signal Processing Library for Extraction of SpO2, HR, HRV, and RR from Photoplethysmographic Waveforms
DepartmentBiomedical Engineering
  • Prof. Yitzhak Mendelson, Advisor
  • Prof. R. James Duckworth, Committee Member
  • Prof. William R. Michalson, Committee Member
  • Keywords
  • wearable medical sensors
  • arterial oxygen saturation
  • software development
  • embedded systems
  • heart rate
  • respiration rate
  • heart rate variability
  • pulse oximetry
  • digital signal processing
  • Date of Presentation/Defense2006-07-17
    Availability unrestricted


    Non-invasive remote physiological monitoring of soldiers on the battlefield has the potential to provide fast, accurate status assessments that are key to improving the survivability of critical injuries. The development of WPI’s wearable wireless pulse oximeter, designed for field-based applications, has allowed for the optimization of important hardware features such as physical size and power management. However, software-based digital signal processing (DSP) methods are still required to perform physiological assessments. This research evaluated DSP methods that were capable of providing arterial oxygen saturation (SpO2), heart rate (HR), heart rate variability (HRV), and respiration rate (RR) measurements derived from data acquired using a single optical sensor. In vivo experiments were conducted to evaluate the accuracies of the processing methods across ranges of physiological conditions. Of the algorithms assessed, 13 SpO2 methods, 1 HR method, 6 HRV indices, and 4 RR methods were identified that provided clinically acceptable measurement accuracies and could potentially be employed in a wearable pulse oximeter.

  • wjohnston.pdf

  • Browse by Author | Browse by Department | Search all available ETDs

    [WPI] [Library] [Home] [Top]

    Questions? Email etd-questions@wpi.edu
    Maintained by webmaster@wpi.edu