A client with type II diabetes is scheduled to have a computed tomography (CT) scan with IV contrast of the brain to rule out a brain tumor. What health teaching would the nurse include?
Your provider will obtain a signed consent from you prior to the completion of the CT scan.
You’ll need to let your doctor know if you have seafood allergies.
Do not take your scheduled dose of Metformin 500 mg PO.
The procedure will be done at the bedside.
Take your Metformin as usual before the test.
The Correct Answer is B
Title: Choice A Reason:
Patients with seafood allergies may have a higher risk of allergic reactions to iodinated contrast media used in CT scans. However, this is not a definitive contraindication. The nurse should inform the patient to notify their healthcare provider about any known allergies, including seafood, as a precautionary measure. This allows the healthcare team to take necessary steps to prevent any adverse reactions, such as premedication with antihistamines or corticosteroids.
Title: Choice B Reason:
Metformin is a common medication used to manage type II diabetes. When a patient is scheduled for a CT scan with IV contrast, it is crucial to withhold Metformin before the procedure. This is because the combination of Metformin and iodinated contrast can increase the risk of contrast-induced nephropathy (CIN) and lactic acidosis, a rare but serious condition. The general recommendation is to stop Metformin at the time of or prior to the procedure and withhold it for 48 hours after the procedure, resuming only after renal function has been re-evaluated and found to be normal.
Title: Choice C Reason:
CT scans, especially those requiring IV contrast, are typically performed in a radiology suite equipped with the necessary technology and medical personnel. Performing such a procedure at the bedside is uncommon and not standard practice due to the need for specialized equipment and immediate access to emergency care in case of adverse reactions. Therefore, this statement is incorrect.
Title: Choice D Reason:
Taking Metformin as usual before the test is not recommended due to the risk of lactic acidosis when combined with iodinated contrast. As previously mentioned, Metformin should be withheld before and after the procedure until renal function is confirmed to be normal. This precaution helps to prevent any potential complications associated with the interaction between Metformin and the contrast agent.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","C","D"]
Explanation
Choice A reason: Monitoring the heart rate is crucial when administering amiodarone, as this drug can cause bradycardia (a slower than normal heart rate). Amiodarone affects the electrical conduction system of the heart, and close monitoring helps ensure that the heart rate remains within a safe range. The normal resting heart rate for adults is typically between 60 and 100 beats per minute.
Choice B reason: Respiratory rate monitoring is essential because amiodarone can cause pulmonary toxicity, which may manifest as interstitial pneumonitis or pulmonary fibrosis. Early detection of respiratory changes can help prevent severe complications. The normal respiratory rate for adults is 12 to 20 breaths per minute.
Choice C reason: Monitoring heart rhythm is necessary because amiodarone is used to treat arrhythmias, and it can also cause new arrhythmias or exacerbate existing ones. Continuous ECG monitoring helps detect any abnormal rhythms early, allowing for prompt intervention. Normal sinus rhythm is characterized by a regular rhythm with a rate of 60 to 100 beats per minute.
Choice D reason: Cardiac output monitoring is important because amiodarone can affect the contractility of the heart and overall cardiac function. Cardiac output is a measure of the amount of blood the heart pumps in one minute, and it is crucial for ensuring adequate tissue perfusion. Normal cardiac output ranges from 4 to 8 liters per minute in adults.
Correct Answer is C
Explanation
Choice A: Severe Hypertension
Severe hypertension can be a sign of increased intracranial pressure (ICP), but it is not typically the earliest sign. Hypertension often occurs as a compensatory mechanism to maintain cerebral perfusion pressure. While it is a significant finding, it usually follows other more immediate signs of increased ICP.
Choice B: Dilated and Nonreactive Pupils
Dilated and nonreactive pupils are a late sign of increased ICP and indicate severe brainstem compression. This finding suggests that the pressure has reached a critical level, leading to brain herniation. It is a very serious sign but not the earliest indicator of increasing ICP.
Choice C: Decreased Level of Consciousness
A decreased level of consciousness is often the earliest and most sensitive indicator of increasing ICP. Changes in consciousness can range from confusion and lethargy to complete unresponsiveness. This symptom reflects the brain’s response to increased pressure and reduced cerebral perfusion, making it a critical early sign that requires immediate attention.

Choice D: Projectile Vomiting
Projectile vomiting can occur with increased ICP due to pressure on the vomiting centers in the brainstem. However, it is not typically the earliest sign. Vomiting often accompanies other symptoms such as headache and changes in consciousness.
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