CABT Clinical Procedures & Techniques 5

Question 1

A ventilator's flow sensor reads consistently lower than the rotameter reference during a performance verification. The MOST likely cause is:

Accepted Answer

Moisture condensation or contamination in the flow sensor

Answer

High ambient temperature affecting electronic calibration

Answer

Incorrect FiO2 setting on the blender

Answer

Excessive PEEP level altering flow dynamics

Question 2

The 'dead volume' in a syringe pump infusion system is clinically significant because it:

Accepted Answer

Delays actual drug delivery when a new syringe is loaded or rate is changed

Answer

Causes the pump motor to draw excess current

Answer

Prevents accurate weight-based dosing calculations

Answer

Increases the risk of air embolism in the IV line

Question 3

Which parameter should a biomedical technician verify when performing a functional check on an automated external defibrillator (AED) self-test override?

Accepted Answer

Shock delivery into a 50-ohm load

Answer

Voice prompt clarity at defined decibel level

Answer

ECG analysis algorithm accuracy with stored test vectors

Answer

Battery manufacturer date code

Question 4

During a point-of-care (POC) i-STAT analyzer quality control failure, the FIRST action by the biomedical technician should be to:

Accepted Answer

Check control expiration dates, storage conditions, and cartridge lot

Answer

Remove the analyzer from service immediately

Answer

Repeat the QC using a fresh cartridge from a different lot

Answer

Recalibrate using distilled water

Question 5

In transcutaneous electrical nerve stimulation (TENS) therapy setup, 'conventional TENS' mode is characterized by:

Accepted Answer

High frequency (80–150 Hz), low intensity pulses below motor threshold

Answer

Low frequency (2–4 Hz), high intensity pulses causing muscle contraction

Answer

Burst mode at 2 Hz carrier with 100 Hz internal frequency

Answer

Continuous DC current for iontophoresis

Question 6

When a hospital purchases a refurbished ventilator, which document provides the MOST critical assurance that the device meets original manufacturer performance specifications?

Accepted Answer

Certificate of conformance from an ISO 13485-certified refurbisher

Answer

The original operator manual

Answer

Biomedical technician's incoming inspection checklist

Answer

The facility's preventive maintenance schedule

Question 7

A patient undergoing cardiac monitoring develops an irregular artifact resembling ECG waveforms at 60 Hz. The MOST likely source is:

Accepted Answer

60 Hz AC power line interference (electromagnetic interference)

Answer

Patient movement during deep breathing

Answer

Pacemaker spike artifact

Answer

Lead transposition at the RA and LA positions