# A client has a multilumen central catheter with the infusions shown. The nurse must flush the unused saline-locked lumen without delivering medication remaining in a vasopressor line. Click the access port that matches that instruction.

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> subject: Pharmacological and Parenteral Therapies  
> category: PPT

## Question

A client has a multilumen central catheter with the infusions shown. The nurse must flush the unused saline-locked lumen without delivering medication remaining in a vasopressor line. Click the access port that matches that instruction.

![](https://mymerci.kr/data/nclex/hotspot/regen_20260908_2350/HSR514.svg)

## Explanation

D leads to the unused independent lumen and does not join either active infusion circuit.

## In-depth explanation

Quick answer
D. D leads to the unused independent lumen and does not join either active infusion circuit.
Why this is the best choice
Trace the entire path, not just the nearest segment. C appears separate near its port but joins the norepinephrine circuit at the filled junction; flushing it could push residual medication rapidly. D has no shared junction and leads to the unused lumen described in the instruction.
Clinical picture
The observations are fictional teaching data. Apply the stated context; the selected feature does not by itself replace a complete bedside assessment.
Memory hook
Trace every connection to the patient before accessing or flushing a line.
Decision rule
Trace every connection to the patient before accessing or flushing a line.
Why the other regions do not fit
A is on the vasopressor trunk. B belongs to the active maintenance infusion rather than the unused lumen. C joins the vasopressor circuit. D alone is the unused independent route.
**Sources**
- Flushing tubing containing vasopressor can deliver an unintended bolus; trace lines and use appropriate independent access.

## Key concepts

- **Independent lumen identification before flushing** — Trace every connection to the patient before accessing or flushing a line.
- **Comparison with context** — C is physically separate at the port but merges downstream with the drug circuit.

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