A diabetic client who is currently taking metformin is ordered a computerized tomography (CT) scan with contrast. The nurse understands that the client's metformin should be discontinued how many hours before receiving intravenous (IV) contrast?

24 hours

12 hours

6 hours

48 hours

Answer and Explanation

The Correct Answer is B

A. Discontinuing metformin 24 hours before a CT scan is longer than necessary and not standard practice.
B. It is generally recommended that metformin be held for at least 12 hours before the administration of IV contrast to reduce the risk of lactic acidosis, especially in clients with renal impairment.
C. Six hours is insufficient time to ensure the medication is cleared from the system, considering the potential risks.
D. Discontinuing metformin for 48 hours is overly cautious and not necessary unless there are complications that arise after the contrast is administered.

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Correct Answer is C

Explanation

A. LABAs can help prevent asthma attacks, including those triggered by exercise, so this statement is accurate and does not indicate a need for further education.
B. LABAs may cause side effects like an increased heart rate, which the client correctly recognizes.
C. LABAs are not intended for immediate relief of asthma symptoms; they are for long-term control. A short-acting beta2-agonist (SABA) should be used for acute symptoms, indicating this client needs further education.
D. Over time, tolerance can develop with some medications, and this understanding is accurate, so it does not indicate a need for additional teaching.

A. Flumazenil B. Atropine C. Naloxone D. Physostigmine

Correct Answer is D

Explanation

A. Flumazenil is a benzodiazepine antagonist and is not indicated for anticholinergic overdose.
B. Atropine is an anticholinergic medication used to treat bradycardia and other conditions, but it would not be appropriate for treating an anticholinergic overdose, as it can worsen the symptoms.
C. Naloxone is an opioid antagonist and would not be effective in treating scopolamine overdose.
D. Physostigmine is a reversible cholinesterase inhibitor that can counteract the effects of anticholinergic agents, making it the appropriate choice for reversing scopolamine toxicity.

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A diabetic client who is currently taking metformin is ordered a computerized tomography (CT) scan with contrast. The nurse understands that the client's metformin should be discontinued how many hours before receiving intravenous (IV) contrast?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A client's severe asthma has necessitated the use of a long-acting beta2-agonist (LABA). Which of the client's statements suggests a need for further education?

Correct Answer is C

Explanation

A client has overdosed on scopolamine (Scopace) while being treated for motion sickness. The nurse recognizes she will administer which medication for an anticholinergic overdose?

Correct Answer is D

Explanation

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