REAL TIME VITAL SIGNS MONITORING USING NI LABVIEW

REAL TIME VITAL SIGN MONITORING USING NI LABVIEWEngr. Narinder Parshad ChowdhryM.Sc. (e-Health & Telemedicine Systems) London, UK Assistant Professor Dept. of Biomedical EngineeringMehran UET, Jamshoro, Sindh 4th International Conference on Transforming Healthcare with IT 6-7th September Hyderabad India

OUTLINEProject Overview Aim & objectives NI LabView & DAQ SystemDesign of VIs & user interface MethodologyResultsConclusion

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

AIM & OBJECTIVESTo 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 LabVIEWIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|BLOOD PRESSUREBlood 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 MethodReal time Vital Signs monitoring using NI LabVIEWIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|BLOOD PRESSUREAuscultatory Method

Need StethoscopeAnalog Measurement

Oscillometric MethodElectronic Pressure sensorDigital Measurement

Real time Vital Signs monitoring using NI LabVIEWIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|

BLOOD PRESSURERanges of Blood Pressure in different Ages StageApproximate ageSystolic, mmHgDiastolic, mmHgInfants1 to 12 months751005070Toddlers1 to 4 years801105080Preschoolers3 to 5 years801105080School age6 to 13 years851205080Adolescents13 to 18 years & >951406090Real time Vital Signs monitoring using NI LabVIEWIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|PULSE OXIMETRY (SpO2)Real time Vital Signs monitoring using NI LabVIEWPulse 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 wavelengthDeoxygenated hemoglobin Red LED 660nm wavelength

Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|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|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|HEART RATEReal time Vital Signs monitoring using NI LabVIEWNormal RangesNewborn baby - 120 to 160Baby aged from 1 to 12 months - 80 to 140Baby/toddler aged from 1 to 2 years - 80 to 130Toddler/young child aged 2 to 6 years - 75 to 120Child aged 7 to 12 years - 75 to 110Adult aged 18+ years - 60 to 100Adult athlete - 40 to 60Current devices

National Health Service, UKIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|BLOOD PRESSURE MECHANISMReal time Vital Signs monitoring using NI LabVIEWConsist of:

Air BulbPressure Control ValveHollow Rubber TubePressure CuffPressure Sensor

Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|Real time Vital Signs monitoring using NI LabVIEWBLOOD PRESSURE MECHANISM

Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|Real time Vital Signs monitoring using NI LabVIEWSpO2 & HEART RATE MECHANISMConsist of:

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

BPX43Introduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|Real time Vital Signs monitoring using NI LabVIEWSpO2 & HEART RATE MECHANISM

Finger PlacementIR LEDRED LEDPhototransistorIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|NI LABVIEWReal time Vital Signs monitoring using NI LabVIEWIntroduction | 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

VIDAQ SYSTEMReal time Vital Signs monitoring using NI LabVIEWIntroduction | 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 basedInput / Output modulesTouch Screen Display

ALGORITHM CONCEPTReal time Vital Signs monitoring using NI LabVIEWIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|STARTEnter the NAME and AGEInflate the cuff up to 180mmHgWait until Cuff is deflated up to 30mmHgSignal is acquired & send for computation SYSTOLICDIASTOLICSTORE1) 2) 3) Name & Age BP30 secondsRed LED ONPhoto detector detects the dataRed LED OFFIR LED ONPhoto detector detects the dataIR LED OFFFurther ComputationsHEART RATESpO2 Level5 sec5 secSpO2 & HRDisplayed & Saved in MS ExcelTry AgainYESNOFINISHReal time Vital Signs monitoring using NI LabVIEWIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|USER INTERFACEPURPOSE

To get the Name and Age of the user or patientPrompt User for input

Real time Vital Signs monitoring using NI LabVIEWIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|BLOOD PRESSUREPumping up to 180 mmHg

Acquiring data until pressure drops up to 30 mmHg

Further computations on acquired data

Real time Vital Signs monitoring using NI LabVIEWIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|BLOOD PRESSURE

Whole VI21Real time Vital Signs monitoring using NI LabVIEWIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|SpO2 & HEART RATETurn ON Red LedAcquire & Compute data

3. Turn OFF Red LED & Turn ON IR LEDAcquire & Compute dataTurn OFF IR LEDHEART RATEReal time Vital Signs monitoring using NI LabVIEWIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|SpO2 & HEART RATEWhole VI

Real time Vital Signs monitoring using NI LabVIEWIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|SAVING IN EXCELAcquiring data from VI & Displaying it.Saving Data in MS ExcelOption to Try Again

Real time Vital Signs monitoring using NI LabVIEWIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|FRONT PANEL

Real time Vital Signs monitoring using NI LabVIEWIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|EXPERIMENTS

Whole Appended signal of Blood Pressure

Real time Vital Signs monitoring using NI LabVIEWIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|EXPERIMENTSResult saved in MS Excel

Real time Vital Signs monitoring using NI LabVIEWIntroduction | Literature Review | Hardware |NI Software & DAQ System| Methodology | Results | Conclusion|CONCLUSIONLow cost Real time vital sign monitoring and easy to share and storeCan be used in user friendly / home environmentCan be used in rural/remote AreasNo need for particular atmosphereUser (patient) can check vital sign routinely or in case any abnormality occurs User may contact with available expert doctor using Telemedicine