Clinical Medical Assistant Exam Practice Question

Correct Answer: B

Rationale: Cleaning the skin where the electrodes will be placed is essential for ensuring proper adhesion and accurate readings from the Holter monitor. Clean skin reduces the risk of interference from oils and dirt, which can affect the monitor's performance.

Applying a thick layer of lotion (Option A) would create a barrier that can prevent the electrodes from adhering properly, leading to inaccurate readings. Asking the patient to hold their breath (Option C) is unnecessary and could cause discomfort; breathing does not impact electrode placement. Placing electrodes without any skin preparation (Option D) neglects critical steps for optimal monitoring, potentially compromising the results.