A nurse supervises assistive personnel (AP) applying electrocardiographic monitoring. Which statement would the nurse provide to the AP related to this procedure?

A. "Turn off oxygen prior to monitoring the client.": Oxygen does not interfere with electrocardiographic (ECG) monitoring, so turning it off is unnecessary and could compromise the client’s oxygenation. Safety protocols emphasize maintaining supplemental oxygen as ordered while performing ECG procedures. B. "Add gel to the electrodes prior to applying them.": Modern ECG electrodes typically come pre-gelled, and additional gel is not required. Adding extra gel could create electrical artifacts, interfere with signal quality, or increase the risk of skin irritation. Proper electrode placement relies on clean, dry skin rather than extra conductive gel. C. "Clean the skin and clip hairs if needed.": Proper skin preparation is essential for accurate ECG readings. Cleaning the skin removes oils, dirt, and dead cells, while trimming excessive hair ensures electrodes adhere properly, reduces impedance, and prevents artifact, improving the reliability of the cardiac monitoring. D. "Place the electrodes on the posterior chest": Standard ECG electrode placement is primarily on the anterior chest and extremities, not on the posterior chest. Placing electrodes on the back would alter lead positioning, produce inaccurate readings, and compromise diagnostic interpretation.