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

Asystole and pulseless electrical activity

Answer

Atrial fibrillation with rapid ventricular response

Answer

Complete heart block with bradycardia

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

At the beginning of exhalation when dead-space gas exits first

Answer

At peak inhalation when alveolar gas is maximally diluted

Answer

Midway through exhalation when flow rate is highest

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

Applying continuous uniform pressure to compress deep veins at a fixed pressure

Answer

Delivering electrical stimulation to calf muscles to induce rhythmic contractions

Answer

Cooling the extremity to slow venous blood flow and prevent clot propagation

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

Velocity of the titrated bolus injection

Answer

Volumetric threshold before infusion interruption

Answer

Vascular tone-based infusion index

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

Infrared thermography detecting bladder wall temperature changes

Answer

Bioelectrical impedance measuring fluid resistance across the lower abdomen

Answer

Magnetic resonance imaging of pelvic structures

Question 6

In a phacoemulsification unit used for cataract surgery, ultrasonic energy at approximately 40 kHz is used to:

Accepted Answer

Fragment and emulsify the lens nucleus so it can be aspirated from the eye

Answer

Weld the corneal incision closed after lens removal

Answer

Sterilize the surgical field before lens implantation

Answer

Measure intraocular pressure during the procedure

Question 7

A transcutaneous electrical nerve stimulation (TENS) unit provides pain relief primarily through which mechanism?

Accepted Answer

Activation of large-diameter sensory fibers that inhibit pain signal transmission via gate control theory

Answer

Direct destruction of nociceptors in the skin to permanently reduce pain sensitivity

Answer

Electrical stimulation of motor neurons causing muscle contractions that release endorphins only

Answer

Induction of local anesthesia by depolarizing small C-fiber pain neurons simultaneously