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REAL TIME VITAL SIGN MONITORING USING NI LABVIEW
1. 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
2. OUTLINE
Project Overview
Aim & objectives
NI LabView & DAQ System
Design of VIs & user interface
Methodology
Results
Conclusion
3. 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
4. AIM & OBJECTIVES
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.
Real time Vital Signs monitoring using NI LabVIEW
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
5. BLOOD PRESSURE
• 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
Real time Vital Signs monitoring using NI LabVIEW
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
6. BLOOD PRESSURE
Auscultatory Method
• Need Stethoscope
• Analog Measurement
Oscillometric Method
• Electronic Pressure sensor
• Digital Measurement
Real time Vital Signs monitoring using NI LabVIEW
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
7. BLOOD PRESSURE
Ranges of Blood Pressure in different Ages
Stage Approximate age Systolic, mmHg Diastolic, mmHg
Infants 1 to 12 months 75–100 50–70
Toddlers 1 to 4 years 80–110 50–80
Preschoolers 3 to 5 years 80–110 50–80
School age 6 to 13 years 85–120 50–80
Adolescents 13 to 18 years & > 95–140 60–90
Real time Vital Signs monitoring using NI LabVIEW
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
8. PULSE OXIMETRY (SpO2)
Real time Vital Signs monitoring using NI LabVIEW
• 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
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
9. PULSE OXIMETRY (SpO2)
Real time Vital Signs monitoring using NI LabVIEW
Pulsatile & Non-pulsatile Absorption factors
Oxygen level (SpO2)
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
10. PULSE OXIMETRY (SpO2)
Real time Vital Signs monitoring using NI LabVIEW
Principle of sensor
Current devices
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
11. HEART RATE
Real time Vital Signs monitoring using NI LabVIEW
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
Current devices
NationalHealthService,UK
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
12. BLOOD PRESSURE MECHANISM
Real time Vital Signs monitoring using NI LabVIEW
Consist of:
• Air Bulb
• Pressure Control Valve
• Hollow Rubber Tube
• Pressure Cuff
• Pressure Sensor
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
13. Real time Vital Signs monitoring using NI LabVIEW
BLOOD PRESSURE MECHANISM
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
14. Real time Vital Signs monitoring using NI LabVIEW
SpO2 & HEART RATE MECHANISM
Consist of:
• Red Light Emitting Diode (Red LED)
• Infrared Light Emitting Diode (IR LED)
• Photodiode / Phototransistor
BPX43
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
15. Real time Vital Signs monitoring using NI LabVIEW
SpO2 & HEART RATE MECHANISM
Finger Placement
IR LED
RED LED
Phototransistor
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
16. 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
17. 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
18. ALGORITHM CONCEPT
Real time Vital Signs monitoring using NI LabVIEW
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
START
Enter the NAME
and AGE
Inflate the cuff up
to 180mmHg
Wait until Cuff is
deflated up to 30mmHg
Signal is acquired &
send for computation
SYSTOLIC
DIASTOLIC
STORE
1)2)3)Name&AgeBP
30seconds
Red LED ON
Photo detector detects
the data
Red LED OFF
IR LED ON
Photo detector detects
the data
IR LED OFF
FurtherComputations
HEARTRATESpO2Level
5sec5sec
SpO2&HR
Displayed&SavedinMSExcel
TryAgain
YESNO
FINISH
19. 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
20. 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
21. Real time Vital Signs monitoring using NI LabVIEW
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
BLOOD PRESSURE
Whole VI
22. Real time Vital Signs monitoring using NI LabVIEW
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
SpO2 & HEART RATE
1. Turn ON Red Led
2. Acquire & Compute data
3. Turn OFF Red LED & Turn ON IR LED
4. Acquire & Compute data
5. Turn OFF IR LED
HEART RATE
23. Real time Vital Signs monitoring using NI LabVIEW
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
SpO2 & HEART RATE
Whole VI
24. 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
25. Real time Vital Signs monitoring using NI LabVIEW
Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|
FRONT PANEL
26. 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
27. 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
28. 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