CBET Healthcare Technology Problem-Solving 4

Question 1

A ventilator's tidal volume display reads 500 mL but a calibrated test lung measurement shows only 420 mL. What is the most likely cause?

Accepted Answer

Flow sensor calibration drift

Answer

Incorrect PEEP setting

Answer

Low oxygen supply pressure

Answer

Faulty inspiratory valve

Question 2

A nurse reports that a patient's SpO2 monitor reads 98% while the patient appears cyanotic. Which troubleshooting step should be performed first?

Accepted Answer

Check probe placement and peripheral perfusion

Answer

Replace the entire monitor

Answer

Recalibrate the SpO2 module

Answer

Measure ABG immediately and discard the monitor reading

Question 3

An infusion pump alarms 'upstream occlusion' but the tubing appears clear. What should the BMET check next?

Accepted Answer

Closed roller clamp or kinked tubing upstream of the pump

Answer

Battery level of the pump

Answer

Software version of the pump firmware

Answer

IV bag height relative to the patient

Question 4

During a preventive maintenance inspection, an electrosurgical unit's leakage current measures 450 µA chassis to ground. What action is required?

Accepted Answer

Remove from service; leakage exceeds the 300 µA limit for ESUs

Answer

Return to service; the reading is within acceptable limits

Answer

Install an additional ground wire and retest

Answer

Report to nursing and continue normal use

Question 5

A defibrillator delivers only 150 J when set to 200 J during an output verification test. After replacing the energy storage capacitor the problem persists. What should be investigated next?

Accepted Answer

Charging circuit and charge relay

Answer

Patient cable integrity

Answer

Battery voltage under load

Answer

Front-panel display calibration

Question 6

A hospital bed's weight scale consistently reads 5 kg below the known weight of a calibration mass. Which corrective action is most appropriate?

Accepted Answer

Perform a span calibration adjustment using NIST-traceable weights

Answer

Replace the load cell immediately

Answer

Zero the scale with the patient in bed

Answer

Add a correction factor to nursing documentation

Question 7

A patient monitor's ECG trace shows excessive 60 Hz artifact despite proper lead placement. After checking lead connections, what is the next troubleshooting step?

Accepted Answer

Verify patient ground electrode contact and integrity

Answer

Replace the ECG module

Answer

Switch the monitor to a different electrical outlet

Answer

Increase the filter bandwidth setting