CABT Medical Equipment Operations 4

Question 1

What does the term 'tidal volume' specifically refer to in mechanical ventilation?

Accepted Answer

The volume of air moved in one normal breath cycle

Answer

Tidal volume is the volume of air inhaled or exhaled during a single normal breath, typically set between 6–8 mL/kg of ideal body weight in ventilated patients.

Question 2

Which safety feature in an infusion pump prevents free-flow of medication when the door is opened?

Accepted Answer

Free-flow protection clamp

Answer

Free-flow protection clamps automatically occlude the tubing when the pump door is opened, preventing gravity-driven free flow of potentially dangerous medications.

Question 3

In an automated external defibrillator (AED), what does the device analyze before advising a shock?

Accepted Answer

Heart rhythm via ECG electrodes

Answer

AEDs use built-in algorithms to analyze the patient's ECG rhythm through electrode pads to determine whether a shockable rhythm such as VF or pulseless VT is present.

Question 4

What is the purpose of 'PEEP' in mechanical ventilation?

Accepted Answer

To maintain positive pressure in the airway at end-expiration and prevent alveolar collapse

Answer

Positive End-Expiratory Pressure (PEEP) keeps a baseline positive pressure in the airways at the end of exhalation, preventing alveolar collapse and improving oxygenation.

Question 5

A biomedical technician performs an electrical safety test and measures chassis leakage current of 600 µA on a Class I device. What action should be taken?

Accepted Answer

Remove the device from service; it exceeds the 500 µA limit for Class I devices

Answer

AAMI/IEC standards for Class I medical devices set a maximum chassis leakage current of 500 µA under normal conditions; 600 µA exceeds this limit and requires the device be removed from service.

(CABT) Certified Associate in Biomedical Technology Practice Test

(CABT) Certified Associate in Biomedical Technology Practice Test

CABT Medical Equipment Operations 4