Infection Control · single question
During a restorative procedure, in which direction should air filtration flow to comply with proper infection control?
Show answer and explanation
Correct answer: A. From clean to dirty areas (Z-pattern)
Infection control requires airflow from CLEAN to DIRTY zones — preventing aerosols and contaminants from reaching clean supplies. The 'Z-pattern' principle: clean zone → contaminated patient/procedure area → exhaust. Source confirms: 'De lo limpio a lo sucio Z.'
- A. CORRECT. Clean to dirty — FROM the clean zone TOWARD the contaminated zone. Z-pattern infection control.
- B. Dirty to clean is WRONG — would carry contaminants toward clean supplies.
- C. Downward flow describes laminar flow direction but doesn't capture the clean-to-dirty principle.
- D. Direction relative to door doesn't capture the clean-to-dirty principle.
Practice Infection Control questions Infection Control study notes