What should be done if a patient experiences a sudden increase in blood glucose levels?

The most appropriate course of action in the scenario of a sudden increase in blood glucose levels is to consult the supervising nurse for further intervention. This choice is correct because it prioritizes patient safety and ensures that a healthcare professional who is trained to make significant medical decisions is involved. Sudden changes in blood glucose levels can indicate various underlying issues and may require a tailored response depending on the patient's overall health status, current medications, and potential symptoms.

Involving the supervising nurse allows for a thorough assessment of the situation, which may include checking for symptoms of hyperglycemia, reviewing the patient's insulin regimen, or adjusting dietary recommendations based on the individual patient's needs. This collaborative approach helps to avoid potential complications that may arise from inappropriate or untimely interventions.

The other options do not provide adequate responses to the concern over elevated blood glucose. Ignoring the situation could lead to serious health risks if the patient is indeed in distress. Immediately administering more insulin without proper assessment might result in overcorrection and can possibly cause hypoglycemia. Changing a patient's diet without consulting a nurse could hinder effective management of the patient's condition and overlook necessary considerations to safely adjust dietary intake.