NBDHE NBDHE Infection Control and Sterilization

Question 1

Which type of instrument requires sterilization according to the Spaulding classification for 'critical' items?

Accepted Answer

Instruments that penetrate soft tissue or bone

Answer

Critical items penetrate soft tissue or bone and must be sterile to prevent transmission of any microorganism.

Question 2

The standard gravity displacement autoclave operates at which temperature and duration for wrapped instruments?

Accepted Answer

250°F (121°C) for 15-30 minutes

Answer

Gravity displacement autoclaves operate at 121°C (250°F) at 15 psi for 15-30 minutes to achieve sterilization of wrapped instruments.

Question 3

Which bloodborne pathogen poses the GREATEST transmission risk per needlestick exposure in the dental setting?

Accepted Answer

Hepatitis B virus (HBV)

Answer

HBV has a needlestick transmission rate of 6-30%, far exceeding HCV at 1.8% and HIV at 0.3%.

Question 4

According to standard precautions, gloves must be changed:

Accepted Answer

Between patients and when torn or punctured

Answer

Standard precautions require glove changes between each patient and immediately if gloves are torn or punctured during care.

Question 5

Which item is classified as 'semicritical' in the Spaulding classification system?

Accepted Answer

Reusable impression tray

Answer

Reusable impression trays contact mucous membranes without penetrating tissue, classifying them as semicritical items requiring sterilization or high-level disinfection.

NBDHE Test Practice Test

NBDHE Test Practice Test

NBDHE NBDHE Infection Control and Sterilization