CBET Medical Equipment Function 5

Question 1

An automated external defibrillator (AED) analyzes cardiac rhythm before delivering a shock. Which rhythm is the device specifically designed to treat?

Accepted Answer

Ventricular fibrillation and pulseless ventricular tachycardia

Answer

AEDs are designed to detect and shock VF and pulseless VT, which are the only shockable rhythms amenable to defibrillation.

Question 2

In a capnograph, end-tidal CO2 (EtCO2) is measured at which point in the respiratory cycle?

Accepted Answer

At the plateau of the alveolar phase, just before inhalation begins

Answer

EtCO2 represents alveolar gas concentration and is read at the end-expiratory plateau, just before the next inhaled breath dilutes the sample.

Question 3

A sequential compression device (SCD) used for DVT prophylaxis works by:

Accepted Answer

Sequentially inflating air bladders from distal to proximal to propel venous blood toward the heart

Answer

SCDs mimic the calf-muscle pump by inflating segments distally to proximally, augmenting venous return and reducing stasis.

Question 4

In an infusion pump, the 'VTBI' setting refers to:

Accepted Answer

Volume to be infused — the total volume programmed to deliver before the pump alarms

Answer

VTBI (Volume To Be Infused) tells the pump how many mL to deliver; it alarms or stops when this limit is reached to prevent over-infusion.

Question 5

A bladder scanner uses which technology to estimate post-void residual urine volume non-invasively?

Accepted Answer

Ultrasound imaging that calculates bladder volume from 3D geometric measurements

Answer

Portable bladder scanners use ultrasound to image the bladder and apply geometric algorithms (typically prolate ellipsoid formula) to estimate volume.

CBET - Certified Biomedical Equipment Technician Practice Test

CBET - Certified Biomedical Equipment Technician Practice Test

CBET Medical Equipment Function 5