CABT Biomedical Equipment Technology & Function 5

Question 1

When testing ground wire integrity on patient care equipment, the AAMI ES1 standard specifies a maximum resistance of:

Accepted Answer

0.1 ohm

Answer

AAMI ES1 requires that the resistance from the grounding pin to any exposed conductive patient-contact surface not exceed 0.1 ohm to ensure effective fault current dissipation.

Question 2

A neonatal incubator's airflow system is designed to maintain what primary environmental parameter for the infant?

Accepted Answer

Neutral thermal environment by controlling air temperature

Answer

The incubator's primary function is to maintain a neutral thermal environment (NTE) that minimizes the infant's metabolic oxygen consumption and heat loss.

Question 3

In a hemodialysis machine, the conductivity monitor of the dialysate circuit is critical because it detects:

Accepted Answer

Incorrect electrolyte concentration that could cause patient harm

Answer

Conductivity correlates directly with dissolved electrolyte (sodium) concentration; a conductivity alarm stops dialysate delivery to prevent hypo- or hypernatremia.

Question 4

The purpose of a thermal compensation resistor (or thermistor) in a pressure transducer is to:

Accepted Answer

Correct for sensitivity drift caused by temperature changes

Answer

Strain-gauge pressure transducers are temperature-sensitive; a thermistor or compensation resistor adjusts the bridge output to maintain accuracy across a range of operating temperatures.

Question 5

Which FDA device classification requires the most rigorous pre-market approval (PMA) process, typically applied to life-sustaining or life-supporting devices?

Accepted Answer

Class III

Answer

FDA Class III devices (e.g., implantable pacemakers, ventricular assist devices) pose the greatest risk and require PMA with clinical evidence of safety and effectiveness.

(CABT) Certified Associate in Biomedical Technology Practice Test

(CABT) Certified Associate in Biomedical Technology Practice Test

CABT Biomedical Equipment Technology & Function 5