Environment of Care Flashcards

Which statement correctly describes the difference between cleaning, disinfection, and sterilization in the healthcare environment?

Answer: Cleaning removes visible soil and reduces bioburden; disinfection kills most pathogens; sterilization eliminates all microbial life including spores

Cleaning removes physical soil and reduces bioburden; disinfection kills or inactivates most pathogens; sterilization achieves a sterility assurance level by eliminating all microbial life including spores.

An infection preventionist is concerned about sink drain biofilm as a source of multidrug-resistant gram-negative organisms (MDROs) in a critical care unit. Which measure is most appropriate?

Answer: Performing periodic drain disinfection and investigating patient-to-sink proximity as a risk factor

Sink drains harbor biofilm and MDROs that can splash onto surfaces and hands; periodic disinfection and assessing sink proximity to high-risk procedures are evidence-based interventions.

A healthcare facility identifies that housekeeping staff are not cleaning the underside of patient bed frames. What surveillance method would most objectively identify this gap?

Answer: Fluorescent marker or ATP bioluminescence monitoring of targeted surfaces

Fluorescent marker or ATP bioluminescence monitoring provides objective, measurable evidence of cleaning thoroughness on specific surfaces without relying solely on direct observation.

Which scenario represents appropriate use of a single-use disposable versus a reusable medical device in the environment of care?

Answer: Reprocessing a reusable blood pressure cuff between patients per manufacturer instructions

Reusable blood pressure cuffs are designed and labeled for reprocessing between patients; reusing items labeled as single-use is a regulatory and patient safety violation.

What is the purpose of monitoring pressure differentials between an AIIR and the hallway using a visual indicator (e.g., flutter strip or smoke test)?

Answer: To verify that the exhaust system is maintaining negative pressure relative to the corridor

Visual indicators confirm that airflow direction is inward (negative pressure), ensuring infectious aerosols cannot escape to the hallway when the door is briefly opened.

During an environmental round, an IP notices standing water in a humidifier reservoir in a patient room. What is the primary infection risk?

Answer: Colonization and aerosolization of waterborne pathogens, particularly Pseudomonas and Legionella

Standing water in humidifier reservoirs supports rapid proliferation of waterborne pathogens like Pseudomonas aeruginosa and Legionella, which can be directly aerosolized into patient breathing zones.

A newly built bone marrow transplant unit is being commissioned. Which combination of ventilation parameters is required for the protective environment?

Answer: Positive pressure, HEPA filtration, minimum 12 ACH, no recirculation from other areas

CDC and ASHRAE 170 specify positive pressure, HEPA filtration (≥99.97%), and a minimum of 12 ACH with no recirculation from other areas for protective environment rooms serving severely immunocompromised patients.