What is a Closed-System Transfer Device (CSTD) and its purpose?

• A. A device used to seal vials after use
• B. A device used to measure dose accuracy
• C. A device that transfers hazardous drugs with reduced risk of leakage or exposure to personnel
• D. A device to discard HD waste

Answer: (C)

Closed-System Transfer Devices are specialized components that create a sealed, controlled pathway for transferring hazardous drugs, so drugs can be drawn into syringes or infused into IV bags without releasing drug aerosols or leaking into the surrounding environment. They couple to a syringe or IV administration set and to a vial or bag via a connector that stays closed when not connected, using valves or membranes that only open when joined and reseal when disconnected. The main purpose is to protect healthcare workers and the work environment from exposure to hazardous drugs during preparation and administration, minimizing leaks, spills, and aerosol generation. This function is different from sealing vials after use, measuring dose accuracy, or disposing of waste.