CABT Patient Monitoring 3

Question 1

A central venous pressure (CVP) waveform shows an elevated 'a' wave. This finding is most associated with:

Accepted Answer

Tricuspid stenosis or right ventricular non-compliance

Answer

An elevated 'a' wave in the CVP tracing reflects increased atrial contraction force against a non-compliant or obstructed right ventricle, as seen in tricuspid stenosis.

Question 2

The bioimpedance method of cardiac output monitoring works by measuring changes in:

Accepted Answer

Thoracic electrical impedance during cardiac cycles

Answer

Bioimpedance cardiac monitoring measures beat-to-beat changes in thoracic electrical resistance caused by blood flow, allowing non-invasive cardiac output estimation.

Question 3

Which alarm condition on a ventilator should a biomedical technician investigate first because it poses immediate life threat?

Accepted Answer

Low pressure / disconnect alarm

Answer

A low pressure or disconnect alarm indicates the patient may not be receiving ventilatory support, representing an immediate life threat requiring urgent response.

Question 4

During ECG monitoring, a 60 Hz electrical interference pattern on the tracing is most likely caused by:

Accepted Answer

Poor electrode contact or nearby electrical equipment

Answer

60 Hz interference (AC interference) is caused by nearby electrical equipment or poor skin-electrode contact allowing AC power line noise to couple into the signal.

Question 5

When a non-invasive blood pressure cuff is too large for the patient, what is the expected effect on the reading?

Accepted Answer

Falsely low blood pressure reading

Answer

An oversized cuff fails to generate adequate pressure over the artery, resulting in falsely low blood pressure measurements.

(CABT) Certified Associate in Biomedical Technology Practice Test

(CABT) Certified Associate in Biomedical Technology Practice Test

CABT Patient Monitoring 3