CSTD stands for which?

• A. Contained System Drug Transfer Device
• B. Closed System Transfer Device for Drugs
• C. Closed System Drug Transfer Device
• D. Containment System Drug Transfer Device

Answer: (C)

A closed system drug transfer device is designed to keep hazardous drug transfer within a sealed barrier, preventing vapors, aerosols, or spills from escaping during preparation and administration. The phrase combines two ideas: a "closed system," meaning a sealed, tamper-resistant pathway, and a "drug transfer device," indicating its use for moving drugs from containers to syringes, IV bags, or administration sets. This naming is the standard in safety guidelines for hazardous drugs, like USP 800, because it directly communicates both the protective barrier and the transfer purpose. Other phrasings imply containment but are not the established term, so the correct designation is the Closed System Drug Transfer Device.