Physiological Signal Simulator

Méabh Malone 09547771Electrical & Electronic Engineering

National University of Ireland, GalwayProject Supervisor: Dr. John Breslin

What is a physiological signal simulator?◦ Reproduces physiological signals◦ Compare healthy versus unhealthy signals◦ Analyse disease characteristics◦ Manipulate signals◦ Communicate with devices such as phones and

monitors

Applications?◦ Medical training & education◦ Research & technology development◦ Sports & fitness

Introduction

Low cost Easy to access Select, reproduce and analyse signals Intuitive Provide feedback Output data

Aims

Project Breakdown

Project Specifications Block Diagram

Physionet

The ECG

LabVIEW code

User Interface design

Output data

Study of the Heart and ECG

Selection and formatting of signals from Physionet

Reproduction of signals on LabVIEW

LabVIEW UI design

Progress to Date

Concepts of the ECG Records electrical

activity of the heart In resting state

muscles are negatively charged

P-QRS-T Complex Changes occur with

heart disease Reference points

Depolarisation Repolarisation

Selection of Signals

Tasks Completed Physionet File

Read data from Physionet files

Format files to only include relevant data

Save to format readable by LabVIEW

JKI State Machine String based Queue State Machine Allow user actions to determine next state

Flowchart to Date

LabVIEW UI to Date

User Interface

Load signal from file Heart Attack

Simulation◦ Select Interval

Normal P QRS P-R interval

Zoom and Scrollbar Ok – Stops program

User Options

UI Improvements:◦ Include a List box◦ Read sampling frequency from file◦ Plot multiple ECG’s at the same time

Output to Hardware Amplifier or Bluetooth device◦ Research◦ Code

Testing of system Identification of limits

Project Plan

Help advance research and development of medical technology at NUI, Galway

Conclusion