Which type of system provides the most opportunity for contamination and why?

Which type of system provides the most opportunity for contamination and why?

• A. Open-system due to nursing manipulation when adding more formula to the bag
• B. Semi-closed due to bridging
• C. Disposable syringe reuse
• D. Closed-system due to sealed bag

Answer: (A)

Contamination risk is highest when the system is open to the environment. In an open-system setup, adding more formula to the bag requires opening the system, which exposes the contents to room air, hands, and surfaces. That moment breaks the sterile barrier and gives microorganisms a direct route into the feeding, greatly increasing the chance of contamination. Closed systems stay sealed and maintain sterility, so they offer the least opportunity for contamination. Semi-closed systems limit exposure but still require some access, leaving a residual risk. Reusing disposable syringes is a separate practice-related hazard tied to sterilization and handling, not the system type itself. Therefore, the scenario described—nursing manipulation of an open system to add formula—presents the greatest opportunity for contamination.

Contamination risk is highest when the system is open to the environment. In an open-system setup, adding more formula to the bag requires opening the system, which exposes the contents to room air, hands, and surfaces. That moment breaks the sterile barrier and gives microorganisms a direct route into the feeding, greatly increasing the chance of contamination. Closed systems stay sealed and maintain sterility, so they offer the least opportunity for contamination. Semi-closed systems limit exposure but still require some access, leaving a residual risk. Reusing disposable syringes is a separate practice-related hazard tied to sterilization and handling, not the system type itself. Therefore, the scenario described—nursing manipulation of an open system to add formula—presents the greatest opportunity for contamination.