Presentation on Blood Pressure Monitoring as part of Final Year Project (Part-1) in 2008 at IUT

2. Project Supervisor : GMA Ehsan ur Rahman
Co- Supervisor : Dr. M S Rahman
Project members :
 Md. Mahmud - ul – Hasan ( 042432 )
 Md. Kafiul Islam ( 042460 )
 Mehedi Azad Shawon ( 042464 )

3. Basically our project is on Bio-medical
Engineering. We were interested on it as
there are a lot of opportunity to work in
this field.

4. 1.To make the system EMBEDDED for blood
pressure monitoring
2. Automatically blood pressure will be taken
3. Analyze the data & detect SYSTOLE, DIASTOLE
& PULSE-RATE & store
4. Result will be shown in LCD monitor
5. Export the result to the server using Ethernet
6. To develop a new effective method for detecting
systole , diastole & pulse rate

5. .
7. Reduce workload of Medical personals
8. Help to keep flawless and regular data of
patient’s progress.
9. Give better medical facilities through the Govt.
Hospitals, Clinics.

6. 1. Needs skilled hand to detect the sound.
2. It always needs some other person to measure.
3. Lower accuracy in the DBPMs
4. Not programmable
5. Even in case of digital one , it is very costly.
6. Data can only be stored but can not be exported
for further processed.

7. Higher Accuracy than analog one
Programmable
data can be stored and use later
Graphical representation
low cost since we are locally making it

9. 1. Blood pressure
2. Systole & diastole
3. Pulse rate

10.  Blood Pressure can be defined as the
lateral pressure exerted by blood on the
vessel walls while flowing through it.
Range of BP:
In case of adult males, the average
Systolic Pressure is 110-145mmHg and
average Diastolic Pressure is 70-90 mmHg.

11. The term blood pressure usually refers to arterial
pressure and is conventionally recorded as two values:
systolic pressure, which is the arterial pressure
measured during systole (the ejection phase of the
cardiac cycle) and
diastolic pressure, which is the arterial pressure
measured during diastole (the filling phase of the
cardiac cycle).

12. The height of Systolic Pressure indicates
i) the extent of work done by Heart,
ii) the force with which the heart is working,
iii) the degree of pressure which the arterial walls have to
withstand.
On the other hand, increased Diastolic Pressure indicates that
the Heart is approaching towards its failure.
Altogether, the height of Blood Pressure gives correct
information about the state of Circulatory System as a whole and
also about the functional conditions of the tissue, cells and
organs.

13. 1. Give cuff pressure up to certain level
2.Release the pressure slowly
3. Collect data & detect systole & diastole
4. Fast release of air pressure

17. Start
Close Main Air Vent & start Pump
Read ADC
Stop Pumping
Read & Store data from ADC
Open main air vent & collect
data
Switch On?
Cuff Press.
>=190mm Hg?
Cuff Press.
<50mm Hg?
Calculate Systole,
Diastole & Pulse Rate
Display BP
Stop
Y
N Y
N
Y
N

18. BufferBuffer
Pressure
Sensor
GND
Vcc
V +
V -
Adder
To ADC
Make Zero
GND
GND

19. Salient Features:
Advanced RISC architecture with 32 x 8 general
purpose working Registers.
Low power AVR 8-bit, 28 leads mc with built-in ADC.
23 programmable I/O lines.
6 single ended ADC input channel each with 10-bit
resolution.
Built-in Analog comparator.
 Max speed of 16 MHz .
8KB of Flash memory , 512 Bytes of EEPROM & 1KB
Internal SRAM

20. Making ISP Circuit for loading the program from PC
through parallel port.
Serial communication between pc & uc
Development of the theory & program for detecting
systole & diastole.
Interfacing between pressure sensor & uc
 Power supply for our whole system.

21. +5 Volt  Control ckt & motor.
+6 Volt  Main Air Vent Solenoid.
+12 Volt  Relay Driving.
+10V~16V  Pressure Sensor
The last one for excitation voltage of Pressure
Sensor is variable & must be a very good one
which is reliable & stable or ripple free.

22. 1.To detect the pulse rate
2.Memory shortage
3.deviation in o/p due to noise in op-amp

23. 1.replacing atmega8 by LPC2148 (32 bit ARM7
uc,40kB SRAM,512KB flash)
2.etharnet connection
3.LCD & Keyboard interface
4. to make a compact form of the whole system as a
market product.

24. Thank you all !!!!!

25. Questions
??