CABT Clinical Procedures & Techniques 2

Question 1

During a 12-lead ECG procedure, which electrode placement is considered the reference point (Wilson's central terminal) for augmented unipolar limb leads?

Accepted Answer

Average of right arm, left arm, and left leg electrodes

Answer

Wilson's central terminal averages the potentials from RA, LA, and LL electrodes to create a near-zero reference for augmented leads (aVR, aVL, aVF).

Question 2

A biomedical technician is calibrating a spirometer. The primary performance verification standard for volume accuracy requires the device to be within what tolerance?

Accepted Answer

±3.5% of reading or 65 mL (whichever is greater)

Answer

ATS/ERS standards require spirometer volume accuracy within ±3.5% of reading or ±65 mL, whichever is greater.

Question 3

When performing a blood glucose meter accuracy check per ISO 15197:2013, what percentage of results must fall within ±15 mg/dL (for concentrations <100 mg/dL) or ±15%?

Accepted Answer

95%

Answer

ISO 15197:2013 requires 95% of blood glucose meter results to meet the specified accuracy criteria compared to a reference method.

Question 4

Which sterilization method is most appropriate for heat-sensitive flexible endoscopes?

Accepted Answer

Ethylene oxide (EtO) or hydrogen peroxide gas plasma

Answer

EtO and hydrogen peroxide gas plasma are low-temperature sterilization methods suitable for heat-sensitive endoscopes that cannot withstand steam autoclaving.

Question 5

During phlebotomy, the tourniquet should be released within what timeframe to prevent hemoconcentration artifacts in laboratory results?

Accepted Answer

1 minute

Answer

Tourniquets should be released within 1 minute of application to prevent hemoconcentration, which can falsely elevate cell counts, proteins, and other analytes.

(CABT) Certified Associate in Biomedical Technology Practice Test

(CABT) Certified Associate in Biomedical Technology Practice Test

CABT Clinical Procedures & Techniques 2