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