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101.

Aesthetics of appearance is called____________(a) orthosis(b) cosmesis(c) lymphosis(d) homeostasisI got this question during an interview.This interesting question is from Cardiac Monitor in section Patient Monitoring System of Biomedical Instrumentation

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The CORRECT ANSWER is (B) cosmesis

The best EXPLANATION: Aesthetics of APPEARANCE is called cosmesis. Orthosis is a modality-specific appliance that aids the performance of a function or movement by augmenting or assisting the residual capabilities of that function or movement.
Discussion
102.

How lead selector selects electrodes?(a) one by one(b) two by two(c) three by three(d) four by fourI have been asked this question in examination.Asked question is from System Concepts in chapter Patient Monitoring System of Biomedical Instrumentation

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The CORRECT choice is (B) two by two

For explanation: The potentials picked up by the patient electrodes are taken to the lead selector switch. In the lead selector, the electrodes are selected two by two according to the lead PROGRAM.
Discussion
103.

How many paper speeds are necessary for ECG recording?(a) One(b) Minimum two(c) Can be any(d) Max twoThe question was posed to me at a job interview.The doubt is from System Concepts topic in portion Patient Monitoring System of Biomedical Instrumentation

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Right choice is (b) Minimum two

The best I can explain: The instability of the baseline, originating from the changes of the contact impedance, demands the application of the automatic baseline stabilizing circuit. A minimum of two PAPER SPEEDS is necessary (25 and 50 mm PER SEC) for ECG RECORDING.
Discussion
104.

How is bipolar recording done?(a) Omni channel EEG(b) Multi channel EEG(c) Uni Channel EEG(d) Non Channel EEGThis question was addressed to me in a job interview.This interesting question is from Measurement of Heart Rate in chapter Patient Monitoring System of Biomedical Instrumentation

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The correct answer is (b) MULTI channel EEG

Explanation: ‘BIPOLAR’ RECORDING is more popular wherein the voltage difference between TWO SCALP electrodes is recorded. Such recordings are done with multi-channel electroencephalographs.
Discussion
105.

Cox and Nolle suggested AZTEC – pre-processing program for real time ECG rhythm analysis at an approximate data reduction rate of _______________(a) 1:10(b) 10:1(c) 1:20(d) 20:1This question was posed to me in an online quiz.The query is from Central Monitors topic in portion Patient Monitoring System of Biomedical Instrumentation

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Right option is (b) 10:1

To elaborate: Cox and Nolle suggested AZTEC (Amplitude-Zone-Time-Epoch-Coding) a pre-processing PROGRAM for real time ECG RHYTHM ANALYSIS at an approximate DATA reduction RATE of 10:1.
Discussion