CBET Patient Monitoring Systems 4

Question 1

A capnograph displays an abnormally low ETCO2 reading with a shark-fin waveform shape. What condition does this most likely indicate?

Accepted Answer

Bronchospasm or partial airway obstruction

Answer

Hyperventilation

Answer

Esophageal intubation

Answer

Pulmonary embolism

Question 2

During routine calibration of a bedside monitor's SpO2 sensor, a BMET notices the oximeter reads 98% on a patient confirmed by ABG to have SaO2 of 84%. What is the most likely cause?

Accepted Answer

Elevated carboxyhemoglobin levels

Answer

Faulty photodetector

Answer

Low ambient light interference

Answer

Incorrect wavelength LED aging

Question 3

A nurse reports that a patient's invasive arterial line is showing an overdamped waveform. Which of the following is the BEST corrective action?

Accepted Answer

Check for air bubbles, clots, or kinked tubing in the system

Answer

Increase the flush bag pressure above 300 mmHg

Answer

Replace the transducer with a higher compliance model

Answer

Reposition the transducer above the phlebostatic axis

Question 4

What is the primary purpose of the fast flush test (square wave test) performed on an invasive hemodynamic monitoring system?

Accepted Answer

To assess the dynamic frequency response and damping coefficient of the system

Answer

To verify accurate zero reference at the phlebostatic axis

Answer

To detect electrical interference from nearby equipment

Answer

To confirm catheter patency before blood draw

Question 5

A neonatal ICU monitor alarm activates for a SpO2 reading of 80%. The BMET verifies equipment function is normal. What physiological artifact is LEAST likely responsible?

Accepted Answer

Elevated fetal hemoglobin concentration

Answer

Motion artifact from infant movement

Answer

Peripheral vasoconstriction reducing perfusion

Answer

Probe placed on an edematous extremity

Question 6

A telemetry technician reports frequent ST-segment false alarms on a cardiac monitor. Which monitor setting change would BEST reduce these false alarms while maintaining clinical sensitivity?

Accepted Answer

Switch to a monitoring lead that provides a more stable baseline for that patient

Answer

Increase the ST alarm threshold by 2 mV

Answer

Disable the ST analysis algorithm

Answer

Reduce the ECG gain setting to 5 mm/mV

Question 7

Which parameter does a Bispectral Index (BIS) monitor measure to assess depth of anesthesia?

Accepted Answer

Processed electroencephalographic (EEG) activity

Answer

End-tidal anesthetic agent concentration

Answer

Cerebral oximetry via near-infrared spectroscopy

Answer

Neuromuscular blockade train-of-four ratio