Which of these patients is most appropriate for the intensive care unit (ICU) charge nurse to assign to a RN who has floated from the medical unit?
A 44-year-old patient receiving IV antibiotics for meningococcal meningitis.
A 23-year-old patient who had a skull fracture and craniotomy the previous day.
A 30-year-old patient who has an ICP monitor in place after a head injury a week ago.
A 61-year-old patient who has an increased ICP and is receiving hyperventilation therapy.
The Correct Answer is A
Choice A rationale
Meningococcal meningitis requires strict droplet precautions and intensive antibiotic therapy, but the management of the patient's stability often aligns with medical-surgical nursing competencies. While the patient is in the ICU for monitoring, the core tasks involve administering intravenous medications and monitoring for standard neurological changes. This makes the patient the most stable and appropriate choice for a float nurse who may not be proficient with specialized ICU-specific equipment or advanced hemodynamic monitoring.
Choice B rationale
A patient who is only one day post-craniotomy for a skull fracture is in a highly critical and unstable period. These patients require frequent, expert neurological assessments every hour to detect subtle signs of increasing intracranial pressure, hemorrhage, or herniation. A medical unit nurse lacks the specific training and daily experience required to manage a fresh post-operative neurosurgical patient, as these cases often involve complex nursing interventions and rapid titration of specialized medications.
Choice C rationale
The presence of an intracranial pressure (ICP) monitor requires specialized knowledge of transducer leveling, zeroing, and waveform interpretation. ICU nurses receive specific training to manage these invasive devices and to calculate cerebral perfusion pressure (CPP). A nurse floating from a medical unit would not have the competency to manage or troubleshoot an ICP monitor, making this assignment unsafe. The risk of infection and technical error is too high for a non-ICU nurse.
Choice D rationale
Hyperventilation therapy is a controlled intervention used to induce hypocapnia, which causes cerebral vasoconstriction and reduces intracranial pressure. This requires very close monitoring of arterial blood gases and ventilator settings to keep carbon dioxide levels within a specific, narrow range. This is a high-acuity intervention that is strictly managed by experienced critical care nurses and respiratory therapists. A float nurse would not have the necessary expertise to manage this specialized physiological manipulation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B"]
Explanation
Choice A rationale
Norepinephrine is a potent alpha-1 adrenergic agonist that causes significant peripheral vasoconstriction. By increasing the systemic vascular resistance, the heart must work harder to eject blood into the aorta. This increase in the resistance against which the left ventricle must pump is the definition of afterload. At a dose of 4 mcg/min, the alpha-adrenergic effects are prominent, directly raising the arterial pressure and increasing the workload and oxygen demand of the myocardial tissue.
Choice B rationale
Dopamine at high doses (10 to 20 mcg/kg/min) primarily stimulates alpha-1 adrenergic receptors in the systemic vasculature. This stimulation results in profound vasoconstriction and an increase in systemic vascular resistance. Consequently, the afterload is significantly elevated. While it also has beta-1 effects that increase contractility, the dominant vascular effect at this high dosage range is the constriction of arterioles, which requires the heart to overcome greater resistance during the systolic phase of the cardiac cycle.
Choice C rationale
Nitroglycerin is a potent vasodilator that primarily acts on the venous system at low doses and the arterial system at higher doses. By relaxing the smooth muscle in blood vessels, it decreases systemic vascular resistance and venous return. This action results in a decrease in afterload and preload, rather than an increase. It is frequently used in clinical practice to reduce the workload of the heart and improve myocardial oxygen balance in conditions like heart failure or angina.
Choice D rationale
Metoprolol is a cardioselective beta-1 adrenergic antagonist that reduces heart rate, contractility, and cardiac output. While it blocks the compensatory tachycardia associated with some forms of heart failure, it does not typically increase afterload. In fact, by reducing the overall sympathetic drive and potentially lowering blood pressure over time, it may lead to a decrease or stabilization of afterload. It does not possess the alpha-adrenergic stimulating properties required to cause systemic vasoconstriction and increase resistance.
Choice E rationale
At a moderate dose of 5 mcg/kg/min, dopamine primarily targets beta-1 adrenergic receptors, which increases myocardial contractility and heart rate. While there is some dopaminergic stimulation that improves renal blood flow, the alpha-adrenergic effects that cause vasoconstriction and increased afterload are usually not dominant at this level. This dosage is often referred to as the cardiac dose, focusing on improving cardiac output through inotropy rather than significantly altering the systemic vascular resistance or afterload.
Correct Answer is D
Explanation
Choice A rationale
Restricting sodium intake to less than 2000 mg per day is a standard intervention for managing ascites and fluid volume overload in patients with cirrhosis. However, sodium restriction does not directly address or treat the cognitive and behavioral changes associated with worsening liver function. While important for overall fluid management, this action is secondary to the urgent need to evaluate the patient for neurotoxic accumulations affecting brain function and mental status.
Choice B rationale
Providing a calm and therapeutic environment is a supportive nursing intervention that can help reduce patient agitation. However, in the context of cirrhosis, behavioral changes are likely physiological rather than purely environmental. Failing to report these changes to a provider in favor of only modifying the environment ignores the underlying medical emergency of rising ammonia levels. Scientific management must prioritize the physiological cause of the altered mentation over simple environmental modifications.
Choice C rationale
Alcoholic hepatitis is an acute inflammatory condition of the liver caused by heavy alcohol consumption, often presenting with jaundice, fever, and liver tenderness. While this patient has a history of alcohol use, the specific new onset of cognitive and behavioral changes is more characteristic of hepatic encephalopathy than a new flare of hepatitis. Reporting for a hepatitis assessment is less precise and less urgent than reporting for a life-threatening neuropsychiatric complication.
Choice D rationale
Hepatic encephalopathy is a reversible neuropsychiatric syndrome caused by liver failure and the accumulation of neurotoxins, primarily ammonia, in the blood. Ammonia levels normally range from 15 to 45 units/dL, but in cirrhosis, the liver cannot convert it to urea. This leads to cerebral edema and altered neurotransmission, manifesting as subtle confusion or irritability. Reporting these signs immediately is essential so that treatments like lactulose can be initiated to lower toxic levels.
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