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Adhesive finger probe + LED used to assess blood flow to the finger tip

Project Overview

Current instruments used in the measurement of pulse transit time are inefficient for home use. An existing product with working ECG and pulse wave circuits along with software to analyze the data has been provided. The primary goal will be to optimize the existing setup for use at home. This will be performed by miniaturizing the circuit, reducing the signal to noise ratio, and improving of the already existing software. These tasks will attempt to be rectified by numerous design additions.

The final design employs a new ECG circuit that has greatly reduced the amount of noise in the wave output. This will allow the software to better detect the R waves and calculate pulse transit time. The software scans the outputed data for the highest peak. A threshold and period is then set and the software rescans the data looking for peaks within the threshold and in each period. The data comes from a memory card. The memory card is inside of the data logger which acts as a collecting device and an analog to digital signal converter. It has a 14 bit processor and samples at a rate of 100 Hz.

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Contact Information

Team Members

  • Jonathan Baran - Team Leader
  • Mark Yarmarkovich - Communicator
  • Karen Chen - BSAC
  • William Stanford - BWIG

Advisor and Client

  • Prof. Walter Block - Advisor
  • Dr. Chris Green - Client
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