CBET Patient Monitoring Systems 5

Question 1

A BMET is troubleshooting a ventilator patient monitor that shows erratic tidal volume readings. The flow sensor passes bench testing. What is the NEXT most logical step?

Accepted Answer

Inspect the flow sensor for moisture condensation or secretion buildup in-line

Answer

Replace the ventilator circuit entirely

Answer

Recalibrate the SpO2 module

Answer

Check the ETCO2 sampling line for occlusion

Question 2

What does a pulmonary artery catheter (Swan-Ganz) measure when the balloon is inflated and wedged?

Accepted Answer

Pulmonary artery occlusion pressure (PAOP), reflecting left heart filling pressure

Answer

Right ventricular end-diastolic pressure

Answer

Central venous pressure

Answer

Cardiac output via thermodilution

Question 3

A patient monitor's non-invasive blood pressure (NIBP) module consistently reads 20 mmHg higher than manual auscultation. Which factor is MOST likely responsible?

Accepted Answer

Cuff is undersized relative to the patient's arm circumference

Answer

Cuff bladder is too wide for the patient's arm

Answer

The patient has an irregular cardiac rhythm

Answer

The NIBP hose has a small internal leak

Question 4

When zeroing an invasive pressure transducer, the transducer stopcock must be positioned at the phlebostatic axis. Where is this anatomical landmark?

Accepted Answer

Level of the right atrium, at the 4th intercostal space mid-axillary line

Answer

Level of the left ventricle apex

Answer

Level of the aortic valve, at the 2nd intercostal space

Answer

Level of the brachial artery at the antecubital fossa

Question 5

A BMET is setting up a new ECG monitor and must select the correct filter mode. When would you use 'diagnostic mode' rather than 'monitoring mode'?

Accepted Answer

When accurate ST-segment morphology analysis is required

Answer

During transport to reduce motion artifact

Answer

In ICU settings with multiple simultaneous alarms

Answer

When the patient is on a mechanical ventilator

Question 6

A hospital is evaluating near-infrared spectroscopy (NIRS) cerebral oximetry monitors. Which clinical scenario represents the PRIMARY intended application for these devices?

Accepted Answer

Detecting regional cerebral oxygen desaturation during cardiac surgery or carotid endarterectomy

Answer

Continuous ICU SpO2 monitoring as a backup to pulse oximetry

Answer

Measuring mixed venous oxygen saturation via pulmonary artery catheter

Answer

Assessing peripheral tissue oxygenation in vascular surgery patients

Question 7

A multi-parameter bedside monitor fails electrical safety testing with a chassis leakage current of 750 µA. Per AAMI ES1 standards for patient care equipment, what is the maximum allowable chassis leakage current in normal condition?

Accepted Answer

500 µA

Answer

100 µA

Answer

300 µA

Answer

1000 µA