Final answer:
The subject of this question is Medicine and the running IV line attached to a PCA pump is called a flush. The flush is delivered with each dose of the PCA medication to ensure the patient receives the full intended dose.
Step-by-step explanation:
The subject of this question is Medicine.
The running IV line attached to a PCA pump is called a flush and it is used to ensure that the patient receives all of the pain medication and has adequate pain control. The flush is delivered each time a dose of the PCA medication is delivered. This helps prevent any residual medication from remaining in the IV line, ensuring that the patient receives the full intended dose.