BIOMEDICAL INSTRUMENTATION

B.E. / B.Tech. DEGREE EXAMINATION, APRIL / MAY 2008

Seventh Semester

Electrical and Electronics Engineering

EI 1351 – BIOMEDICAL INSTRUMENTATION

(Regulation 2004)

Time : Three Hours                                                           Maximum : 100 Marks

Answer All Questions

PART A – [10 X 2 = 20 MARKS]

1. What is the usual conduction velocity range in nerves?
2. Name any two passive transducers.
3. What is an ERG?
4. What is the need for pre amplifier?
5. What is need for earthing of medical instruments?
6. What is the use of plethysmography?
7. Distinguish Microshock and Macroshock.
8. What is the need for image intensifier in an x-ray machine?
9. What is a defibrillator?
10. Name the two types of dialysis.

PART B – [5 X 16 = 80 MARKS]

11. (a) (i) With relevant waveforms explain Action and resting potential. [8 MARKS]
(ii) Explain any one piezoelectric and inductive transducer used in medical application. [8 MARKS]

OR

(b) (i) With block diagram explain cardiovascular circulation. [8 MARKS]
(ii) What is the principle of ultrasonic transducer? Explain any one ultrasonic transducer based instrumentation. [8 MARKS]

12. (a) (i) With relevant equivalent circuit explain the measurement of biopotentials with two electrodes. [8 MARKS]
(ii) Explain in detail EECG lead configurations. [8 MARKS]

OR

(b) (i) With neat diagram explain the principle of Isolation amplifier. What is its use in medical instruments? [8 MARKS]
(ii) Draw and explain typical EEG waveforms. [8 MARKS]

13. (a) (i) Explain any one direct blood pressure measurement method. [8 MARKS]
(ii) Explain how cardiac output can be measured. [8 MARKS]

OR

(b) (i) Explain the method of measuring CO2 and O2 in exhaust air. [8 MARKS]
(ii) Explain how PH of blood can be measured. [8 MARKS]

14. (a) With neat diagram explain the principle of MRI. [16 MARKS]

OR

(b) (i) Distinguish radiographic and fluoroscopic techniques. [8 MARKS]
(ii) Explain the applications of Telemetry in patient care. [8 MARKS]

15. (a) Explain in detail the various types of cardiac pacemakers. [16 MARKS]

OR

(b) (i) Briefly explain three different modes of operation of ventilators. [8 MARKS]
(ii) Draw the block diagram of Nerve and muscle stimulator. Explain. [8 MARKS]