piggyback device

A device used to optimise the IV delivery of fluids and drugs being infused at different rates; in such devices, the reservoir and the valve controlling the rate of delivery are separate, while the delivery port—e.g., an IV access line—is shared
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

piggyback device

Critical care A device used to optimize the IV delivery of fluids and drugs being infused at different rates; in PBDs, the reservoir and the valve controlling the rate of delivery are separate, while the delivery port–eg, an IV access line is shared
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.