Medical Equipment, Isolation and Safety - Sensors and Bioinstrumentation - Biomedical Engineering Previous Year Questions

1

2020 · Biomedical Engineering · Sensors and Bioinstrumentation · Medical Equipment, Isolation and Safety

Biomedical Engineering (BM) 2020

The distal end of an endoscope is placed at a distance of 1 mm from the gastrointestinal wall. The refractive indices of the fiber core and cladding are 1.5 and 1.45, respectively.
The maximum field of view for the endoscope is ________ degrees (rounded off to one decimal place).

Check answer

Open complete paper

2

2020 · Biomedical Engineering · Sensors and Bioinstrumentation · Medical Equipment, Isolation and Safety

Biomedical Engineering (BM) 2020

A 100 mA single current pulse from a pulse generator is used for artificial pacing of heart at the right ventricle. If the delivered energy does not exceed the fibrillation threshold of 300 μJ, the safe duration of the pulse that could be applied to the tissue mass having an impedance of 500 Ω is ________ μs.

Check answer

Open complete paper

3

2021 · Biomedical Engineering · Sensors and Bioinstrumentation · Medical Equipment, Isolation and Safety

Biomedical Engineering (BM) 2021

A pacemaker was implanted in a cardiac patient. It has a battery of 2.4 A.h (Ampere.hour). It is designed to deliver a rectangular pulse of amplitude 1.5 V for 1 ms ON time for every one second. The electrode – heart resistance is 150 Ω. Assuming the current drained from the battery is negligible, the lifetime of the pacemaker is ______ years. (rounded off to the nearest integer)

Check answer

Open complete paper

4

2022 · Biomedical Engineering · Sensors and Bioinstrumentation · Medical Equipment, Isolation and Safety

Biomedical Engineering (BM) 2022

Which of the following statements related to the safety of biomedical instruments are TRUE?

A

When a person is exposed to an electrical hazard, let-go current is defined as the maximum current at which the subject can withdraw voluntarily

B

Microshock is a physiological response resulting from an electrical current passing through heart

C

The patient in an intensive care unit is being exposed to the danger of microshock because of using internal conductive electrodes in the vicinity of the heart

D

The 50 Hz safe current limit for a microshock is greater than 50 mA

Check answer

Open complete paper

5

2024 · Biomedical Engineering · Sensors and Bioinstrumentation · Medical Equipment, Isolation and Safety

Biomedical Engineering (BM) 2024

A mechanical ventilator operating in volume controlled mode is set to deliver 600mL of tidal volume (TV) with a flow rate of 40 L/min. The frequency of breathing is set to 10 breaths per minute. If the flow rate is doubled which one of the following happens?

A

The inspiratory time will increase.

B

The expiratory time will increase.

C

The tidal volume will increase.

D

The frequency of breathing will decrease.

Open complete paper

6

2024 · Biomedical Engineering · Sensors and Bioinstrumentation · Medical Equipment, Isolation and Safety

Biomedical Engineering (BM) 2024

A person standing one meter away from a 4000 curie radioactive source receives a lethal dose of radiation in about 5 minutes. At 3 meters away from the same source, the time in which he will receive the same lethal dose is ______ minutes. Give your answer rounded off to the nearest integer.

Check answer

Open complete paper

7

2026 · Biomedical Engineering · Sensors and Bioinstrumentation · Medical Equipment, Isolation and Safety

Biomedical Engineering (BM) 2026

The half-life of \(^{113m}\)In nuclei is 1.7 hours, and the \(^{99m}\)Tc nuclei is 6.0 hours. If the initial activity levels of \(^{113m}\)In and \(^{99m}\)Tc in their respective samples are 100 Gigabecquerels (GBq) and 20 GBq, the time at which their activity levels become equal is __________ hours.
(Round off to one decimal place)

Check answer

Open complete paper