MEDICAL INSTRUMENTATION. Fifth Homework

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1 MEDICAL INSTRUMENTATION. Fifth Homework
동서의료공학과 정 진 웅

2 Chapter. 7

3 P P 1. Tonometry M constant area = A - describe a principle (earth)
f = Mg M P P (earth) (earth) The volume is not changed. So, pressure inside a ball is getting higher for a balance force per unit area

4 LED Air jeet Eye ball Photo sensor Photo diode Photo TR

5 2. NIBP Cuff pressure Cuff Attach a stethoscope

6 ※ Basis of circulation

7 “NIBP only measure the value of
Measuring with IBP Pa 120mmHg 90mmHg t << arterial pressure >> “NIBP only measure the value of a S.P. and D.P.

8 ※ A process of making product
① Specification ② Circuit design simulation ③ Cad : schematic (ex. Or-cad, Cadence) ④ Cad : layout ⑤ Making a PCB ⑥ Making a components ⑦ Test / Debugging

9 this sound signal with HPF
A principle of NIBP(“Oscillometric methoud”) P sound Cuff pressure 120 mmHg Then, We process this sound signal with HPF 80 mmHg We can hear a interval beat sound No sound (Decompression mode NIBP) T

10 ※ Output, processed with HPF
A noise remained after HPF T

11 “the accuracy is very low.
※ To contrast with Decompression mode NIBP P 120 mmHg 80 mmHg Cuff pressure T (Pressure mode NIBP) “the accuracy is very low. so, not popular”

12 ※ Matlab

13 나름대로 해봤는데 옳게 나온거 같지는 않는거 같습니다. 50Hz를 넣고 80+(40sin(2. pi. t)). sin(100
나름대로 해봤는데 옳게 나온거 같지는 않는거 같습니다. 50Hz를 넣고 80+(40sin(2*pi*t)).*sin(100*pi*t)하고 해서 될꺼같은데 계속 모든 성분이 80로 나오네요.. 유효숫자때문인거같은데… 문제무엇인지 여쭤봅니다..

14 thank you!!