Where should the IV piggyback be connected relative to the roller clamp when initiating the infusion?

• A. Below the roller clamp.
• B. Above the roller clamp.
• C. Directly at the end of the line.
• D. It does not matter where it is connected.

Answer: (B)

When starting an IV piggyback, position the connection above the roller clamp on the main IV line. This keeps the secondary infusion independent from the primary line’s flow control. If the piggyback were attached below the clamp, adjusting or clamping the primary line could affect or block the piggyback flow, and there’s a higher risk of backflow into the main line. Placing the piggyback above the clamp (and often hanging it higher than the primary bag) lets gravity help the secondary infusion and prevents the primary line from interfering with it.