What is the first action a nurse should take when a client reports a burning sensation above an IV site during a potassium infusion?

When a client reports a burning sensation above an IV site during a potassium infusion, the first action a nurse should take is to check the IV access for a blood return. This is crucial because a burning sensation may indicate that the IV catheter is irritating the vein or that the infusion may be infiltrating or extravasating. Verifying blood return helps determine whether the intravenous line is still properly positioned within the vein and functioning as intended.

If blood return is present, it suggests that the IV is still in the vein, which may allow for adjusting the infusion rate as a next step to alleviate the discomfort. Conversely, if there is no blood return, it may indicate that the IV has become dislodged or that the infusion is not being delivered into the bloodstream effectively. This information is vital for timely decision-making regarding the patient's care. By confirming blood return first, the nurse can take appropriate subsequent actions based on the findings, ensuring patient safety and comfort during the potassium infusion.