A nurse is caring for a client who has urticaria following administration of an antibiotic. Which of the following medications should the nurse prepare to administer?
Diphenhydramine
Hydralazine
Protamine
Naloxone
The Correct Answer is A
A. Diphenhydramine: Diphenhydramine is an H1 receptor antagonist that inhibits the binding of histamine to H1 receptors in the skin and vasculature. By blocking histamine-mediated vasodilation, increased capillary permeability, and sensory nerve stimulation, it reduces the erythema, pruritus, and edema associated with urticaria.
B. Hydralazine: Hydralazine is a direct-acting arteriolar vasodilator used to reduce systemic vascular resistance in hypertensive crises or chronic hypertension. It has no effect on histamine pathways or IgE-mediated allergic responses and therefore does not alleviate urticaria or other manifestations of hypersensitivity reactions.
C. Protamine: Protamine sulfate is a cationic protein used to neutralize unfractionated heparin by forming a stable complex, thereby reversing anticoagulation. It does not interfere with histamine release, IgE receptor binding, or any pathophysiologic mechanisms underlying allergic reactions, making it irrelevant for urticaria management.
D. Naloxone: Naloxone is a competitive opioid receptor antagonist that reverses opioid-induced respiratory depression by displacing agonists at the mu-opioid receptor. It has no role in modulating histamine release or the immunologic processes that produce urticaria, and administration would not alleviate allergic symptoms.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Silence the bed alarm when visitors are at the client's bedside: Silencing the bed alarm compromises safety by preventing timely notification if the client attempts to get out of bed unassisted. Bed alarms should remain active at all times for clients on fall precautions.
B. Establish an elimination schedule for the client: Scheduling regular toileting reduces the risk of falls by minimizing unassisted trips to the bathroom, which are a common cause of falls, especially in clients with mobility or cognitive impairments. This is an effective and preventive intervention.
C. Allow the client to walk unassisted near the nursing station: Clients on fall precautions should not ambulate without assistance or appropriate safety measures, even near the nursing station, as unassisted walking increases the risk of falls.
D. Raise all four bed rails on the client's bed: Raising all four bed rails can increase the risk of injury if the client attempts to climb over them and is generally considered a restraint, which requires careful assessment and provider authorization.
Correct Answer is A
Explanation
A. Weigh the client before and after the procedure: Monitoring the client’s weight before and after paracentesis provides an objective measure of the volume of fluid removed. This helps evaluate the effectiveness of the procedure and assess for complications such as fluid shifts or hypotension.
B. Administer a low-volume hypertonic enema the night before the procedure: Bowel cleansing is not required for paracentesis, as the procedure targets the peritoneal cavity, not the gastrointestinal tract. Administering an enema could cause unnecessary discomfort without benefit.
C. Ensure the client has a full bladder just prior to the procedure: A full bladder increases the risk of puncture during paracentesis. Clients are typically advised to void before the procedure to minimize the risk of bladder injury.
D. Place the client in a side-lying position for the procedure: Paracentesis is usually performed with the client in a sitting position, leaning slightly forward, or in a supine position with the head of the bed elevated. Side-lying positioning does not provide optimal access to the fluid-filled peritoneal cavity.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.
