Real Time Vital Sign Monitoring Using NI Labview

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REAL TIME VITAL SIGN MONITORING USING NI
LABVIEW
Engr. Narinder Parshad Chowdhry M.Sc. (e-Health
Telemedicine Systems) London, UK Assistant
Professor Dept. of Biomedical Engineering Mehran
UET, Jamshoro, Sindh
4th International Conference on Transforming
Healthcare with IT 6-7th September Hyderabad
India
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OUTLINE

• Project Overview
• Aim objectives
• NI LabView DAQ System
• Design of VIs user interface
• Methodology
• Results
• Conclusion

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Project Overview

• Project deals with data acquisition signal
  processing of vital signs using NI LabVIEW
• Designed algorithms (Virtual Instruments VIs) of
  heart rate (HR), blood pressure (BP) pulse
  oximetry (SpO2)
• Firstly, BP is measured using pressure sensor,
  air cuff constant air defalting valve
• Secondly, our own designed sensor to measure the
  oxygen saturation, heart rate by using red LED,
  infrared LED photodiode
• Later, sensor is connected to NI DAQ
  measurements are made

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AIM OBJECTIVES
Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion

• To acquire vital signs (physiological parameters)
  using biosensors
• To interface the obtained data with NI DAQ System
  which converts it into digital format.
• To link the DAQ System with NI LabVIEW and design
  an algorithm to measure real time data in
  graphical interface.
• Finally, to design develop a graphical user
  interface in LabVIEW to display the outputs.

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BLOOD PRESSURE
Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion

• Blood pressure (BP), sometimes it is called
  arterial blood pressure, is the pressure exerted
  by circulating blood upon the walls of blood
  vessels.
• During each heartbeat, blood pressure varies
  between a maximum (systolic) and a minimum
  (diastolic) pressure.

• Measurement Techniques
• Invasive (Direct measurement)
• Noninvasive (Indirect measurement)
• Auscultatory Method
• Oscillometric Method

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BLOOD PRESSURE
Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion

• Auscultatory Method
• Need Stethoscope
• Analog Measurement

• Oscillometric Method
• Electronic Pressure sensor
• Digital Measurement

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BLOOD PRESSURE
Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
Ranges of Blood Pressure in different Ages
Stage Approximate age Systolic, mmHg Diastolic, mmHg
Infants 1 to 12 months 75100 5070
Toddlers 1 to 4 years 80110 5080
Preschoolers 3 to 5 years 80110 5080
School age 6 to 13 years 85120 5080
Adolescents 13 to 18 years gt 95140 6090
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PULSE OXIMETRY (SpO2)
Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion

• Pulse Oximetry is a device used to measure the
  oxygen level in our blood.
• Our lungs have efficiency to diffuse oxygen into
  our blood hemoglobin to make it oxygenated
  hemoglobin (HbO2) and after the exchange of
  oxygen with Carbon-di-oxide occurs between tissue
  and blood then the blood becomes deoxygenated
  hemoglobin (Hb).

• Measurement Technique
• Oxygenated hemoglobin
• Infrared LED
• 940nm wavelength
• Deoxygenated hemoglobin
• Red LED
• 660nm wavelength

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PULSE OXIMETRY (SpO2)
Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
Pulsatile Non-pulsatile Absorption factors
Oxygen level (SpO2)
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PULSE OXIMETRY (SpO2)
Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
Principle of sensor Current devices
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HEART RATE
Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
Normal Ranges

• Newborn baby - 120 to 160
• Baby aged from 1 to 12 months - 80 to 140
• Baby/toddler aged from 1 to 2 years - 80 to 130
• Toddler/young child aged 2 to 6 years - 75 to 120
• Child aged 7 to 12 years - 75 to 110
• Adult aged 18 years - 60 to 100
• Adult athlete - 40 to 60

National Health Service, UK
Current devices
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BLOOD PRESSURE MECHANISM
Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion

• Consist of
• Air Bulb
• Pressure Control Valve
• Hollow Rubber Tube
• Pressure Cuff
• Pressure Sensor

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BLOOD PRESSURE MECHANISM
Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
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Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
SpO2 HEART RATE MECHANISM

• Consist of
• Red Light Emitting Diode (Red LED)
• Infrared Light Emitting Diode (IR LED)
• Photodiode / Phototransistor

• BPX43

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Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
SpO2 HEART RATE MECHANISM
IR LED
RED LED
Finger Placement
Phototransistor
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NI LABVIEW
Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion

• National Instruments Corporation, or NI is an
  American Company which produces automated test
  equipment and virtual instrumentation software
  like LabVIEW.
• LabVIEW (short for Laboratory Virtual
  Instrumentation Engineering Workbench) is a
  system design platform and development
  environment for a visual programming language
  from National Instruments.
• Block Diagram
• Front panel

VI
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DAQ SYSTEM
Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion

• DAQ or Data acquisition System convert analog
  waveforms into digital values for processing with
  minimum noise/artifacts.
• Sensors that convert physical parameters to
  electrical signals.
• Analog-to-digital converters that convert
  electrical signals into digital values.
• Components

• NI Compact DAQ USB based

• Input / Output modules

• Touch Screen Display

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ALGORITHM CONCEPT
Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
Enter the NAME and AGE
START
YES
SpO2 HR
Red LED ON
Inflate the cuff up to 180mmHg
Wait until Cuff is deflated up to 30mmHg
30 seconds
5 sec
Photo detector detects the data
HEART RATE
Try Again
BP
STORE 1) 2)
3)
Displayed Saved in MS Excel
SYSTOLIC
Signal is acquired send for computation
Red LED OFF
Further Computations
NO
DIASTOLIC
IR LED ON
Name Age
5 sec
Photo detector detects the data
SpO2 Level
FINISH
IR LED OFF
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Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
USER INTERFACE

• PURPOSE
• To get the Name and Age of the user or patient
• Prompt User for input

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Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
BLOOD PRESSURE

• Pumping up to 180 mmHg

• Acquiring data until pressure drops up to 30 mmHg

• Further computations on acquired data

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Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
BLOOD PRESSURE
Whole VI
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Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
SpO2 HEART RATE

• 3. Turn OFF Red LED Turn ON IR LED
• Acquire Compute data
• Turn OFF IR LED

1. Turn ON Red Led
2. Acquire Compute data

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HEART RATE
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Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
SpO2 HEART RATE
Whole VI
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Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
SAVING IN EXCEL

1. Acquiring data from VI Displaying it.
2. Saving Data in MS Excel
3. Option to Try Again

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Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
FRONT PANEL
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Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
EXPERIMENTS
Whole Appended signal of Blood Pressure
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Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
EXPERIMENTS
Result saved in MS Excel
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Real time Vital Signs monitoring using NI LabVIEW
Introduction Literature Review Hardware NI
Software DAQ System Methodology Results
Conclusion
CONCLUSION

• Low cost Real time vital sign monitoring and easy
  to share and store
• Can be used in user friendly / home environment
• Can be used in rural/remote Areas
• No need for particular atmosphere
• User (patient) can check vital sign routinely or
  in case any abnormality occurs
• User may contact with available expert doctor
  using Telemedicine