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Name:

Roll No.: ...

Invigilator's Signature :.

CS/B.Tech(ICE)/SEM-7/IC-703A/2009-10

2009

BIOMEDICAL INSTRUMENTATION

Time Allotted: 3 Hours Full Marks : 70

The figures in the margin indicate full marks.

Candidates are required to give their answers in their own words

as far as practicable.

GROUP A

( Multiple Choice Type Questions )

1. Choose the correct alternatives for the following :

10 !1 = 10

i) The lung volume expired during maximal forced

expiration following a maximal inspiration is known as

a) vital capacity

b) functional residual capacity

c) total lung capacity

d) total ventilatory capacity.

ii) The type of Transducer used in Ultrasonography for

ultrasonic wave generation is

a) Capacitive transducer

b) Piezo-electric transducerc) Inductive transducer

d) Resistive transducer.

iii) The membrane of heart is known as

a) Pleurae b) Pericardium

c) Meninges d) Peritoneum.


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iv) Half-cell potential is formed due to

a) metal-electrolyte interface

b) skin-electrolyte interface

c) electrolytic impedance

d) skin impedance.

v) A graphic record of heat sounds is known as

a) Electrocardiogram

b) Phonocardiogram

c) Vectorcardiogram

d) Electroencephologram.

vi) Amplitude of EEG signal is

a) 50 V b) 50 mV

c) 50 V d) 50 kV.

vii) MRI uses

a) magnetic field b) chemical field

c) radioactive field d) X-ray.

viii) The triangle whose sides represent the lines along which

3 projections of ECG are measured is known as

a) Galvani triangle b) Einthoven triangle

c) Abbott triangle d) Korotkoff triangle.

ix) The node is known as pacemaker of the heart is

a) AV node b) SA node

c) Anode d) Cathode.

x) Indicator substance used in Fick's method for

evaluation of cardiac output is

a) indocyanin green

b) CO2

c) O2

d) radioactive tracer.


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GROUP B

( Short Answer Type Questions )

Answer any threeof the following. 3 !5 = 15

2. What is bioelectrode ? What are the desirable properties of

bioelectrode ? What do you mean by half-cell potential of

electrodes ? 1 + 2 + 2

3. Give a brief idea of electrical activity of heart. 5

4. a) What is the significance of different parameters in a

normal electrocardiogram ? Mention the normal values

of amplitudes & durations of these parameters.

b) What are the different cardiac arrhythmias ? 3 + 2

5. What do you mean by electric potential ? Give a brief note on

Na+/K+ pumping. 1 + 4

6. a) What do you mean by defibrillation ?

b) What are the differences between ac and dc

defibrillators ? 1 + 4

GROUP C

( Long Answer Type Questions )

Answer any threeof the following. 3 !15 = 45

7. a) What are the problems encountered in a hydrogen

electrode ?

b) How can we overcome from these problems by usingAg/AgCl electrode ?

c) How can the partial pressure of O2

in the blood be

measured by pO2

electrode ? Why 07 volt is applied in

this electrode ? 2 + 6 + 7


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8. a) Why isX-ray used in imaging ?

b) Write down the limitation ofX-ray.

c) Give a brief description of CAT scan system and

operation of CAT scan.

d) What are the application of Ultrasonography ?

2 + 2 + 8 + 3

9. a) Describe an indirect method for blood pressuremeasurement.

b) What are the direct methods for this instrument ?

c) Write down a pressure transducer which is used in

direct measurement of blood pressure & describe its

principle of operation. 6 + 6 + 3

10. What do you mean by EMG ? Give some application of it.

What is EEG ? Describe the operation of EEG system and thedifficulties in recording EEG signal. Give some application of

EEG. 2 + 2 + 2 + 7 + 2

11. Answer any threeof the following : 3 !5

a) MRI

b) Spirometer

c) Cardiac arrthymia

d) Electrical safety and shock hazards

e) Pacemaker.

biomedical 2009

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