A nurse is admitting a client who has acute heart failure following myocardial infarction (MI). The nurse recognizes that which of the following prescriptions by the provider requires clarification?

Laboratory testing of serum potassium upon admission

Bumetanide 1 mg IV bolus every 12 hr

0.9% normal saline IV at 50 mL/hr continuous

Morphine sulfate 2 mg IV bolus every 2 hr PRN pain

Answer and Explanation

The Correct Answer is C

Choice A Reason: This choice is incorrect because laboratory testing of serum potassium upon admission is an appropriate prescription for a client who has acute heart failure following MI. Serum potassium is an electrolyte that aﬀects the cardiac function and rhythm. A normal serum potassium range is 3.5 to 5 mEq/L, and an abnormal level can indicate hypokalemia or hyperkalemia, which can cause arrhythmias, muscle weakness, or paralysis. Therefore, monitoring serum potassium is important to detect and correct any electrolyte imbalance and prevent complications.

Choice B Reason: This choice is incorrect because bumetanide 1 mg IV bolus every 12 hr is an appropriate prescription for a client who has acute heart failure following MI. Bumetanide is a loop diuretic that helps to reduce ﬂuid retention and edema by increasing the urine output and sodium excretion. It may be used for clients who have heart failure, hypertension, or renal impairment, but it can cause hypokalemia, hypotension, or dehydration.

Therefore, administering bumetanide as prescribed can help to improve the cardiac output and reduce the preload and afterload.

Choice C Reason: This choice is correct because 0.9% normal saline IV at 50 mL/hr continuous is an inappropriate prescription for a client who has acute heart failure following MI. 0.9% normal saline is an isotonic solution that contains the same concentration of solutes as blood plasma. It may be used for clients who have ﬂuid loss, dehydration, or shock, but it can worsen ﬂuid overload and pulmonary edema in clients who have acute heart failure. Therefore, clarifying this prescription with the provider is necessary to prevent further deterioration of the client's condition.

Choice D Reason: This choice is incorrect because morphine sulfate 2 mg IV bolus every 2 hr PRN pain is an appropriate prescription for a client who has acute heart failure following MI. Morphine sulfate is an opioid analgesic that helps to relieve pain and anxiety by binding to the opioid receptors in the brain and spinal cord. It may be used for clients who have moderate to severe pain, dyspnea, or chest discomfort, but it can cause respiratory depression, hypotension, or nausea. Therefore, administering morphine sulfate as prescribed can help to reduce the oxygen demand and improve the cardiac function.

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Correct Answer is D

Explanation

Choice A Reason: This choice is incorrect because providing a brightly lit environment may stimulate the client and increase the intracranial pressure. A brightly lit environment is an environment that has a high level of illumination or brightness. It may be used for clients who have depression, seasonal aﬀective disorder, or insomnia, but it does not help to reduce the intracranial pressure.

Choice B Reason: This choice is incorrect because teaching controlled coughing and deep breathing may increase the intrathoracic pressure and increase the intracranial pressure. Controlled coughing and deep breathing are techniques that help to clear the airway and improve lung expansion. They may be used for clients who have respiratory infections, chronic obstructive pulmonary disease, or postoperative complications, but they do not help to reduce the intracranial pressure.

Choice C Reason: This choice is incorrect because encouraging a minimum intake of 2000 mL (67.5 oz) of clear ﬂuids per day may cause ﬂuid overload and increase the intracranial pressure. Fluid overload is a condition in which the body has too much ﬂuid, which can impair the function of the heart, lungs, and kidneys. Therefore, restricting ﬂuid intake and using diuretics may be indicated for clients who have increased intracranial pressure.

Choice D Reason: This choice is correct because elevating the head of the bed 20° may help to improve the venous drainage and decrease the intracranial pressure. As explained above, positioning the client in a semi-Fowler's or high-Fowler's position can facilitate breathing and prevent further complications. However, elevating the head of the bed more than 30° may decrease the cerebral perfusion pressure (CPP), which is the diﬀerence between the mean arterial pressure (MAP) and the intracranial pressure (ICP). A normal CPP range is 70 to 100 mm Hg, and a low CPP (<50 mm Hg) can cause cerebral ischemia, herniation, or death. Therefore, elevating the head of the bed to a moderate angle (20°) may be optimal for clients who have increased ICP.

A. Flatened neck veins. B. Bradycardia. C. Sudden lethargy. D. Muﬄed heart sounds.

Correct Answer is D

Explanation

Choice A Reason: This choice is incorrect because ﬂatened neck veins are not a sign of cardiac tamponade. Cardiac tamponade is a condition in which ﬂuid accumulates in the pericardial sac that surrounds the heart, causing compression and impaired filling of the heart chambers. This leads to reduced cardiac output and hypotension. One of the manifestations of cardiac tamponade is distended neck veins due to increased venous pressure and impaired venous return.

Choice B Reason: This choice is incorrect because bradycardia is not a sign of cardiac tamponade. Bradycardia is a condition in which the heart rate is slower than normal (less than 60 beats per minute). It may be caused by various factors such as vagal stimulation, medication side eﬀects, hypothyroidism, or sinus node dysfunction. It may cause symptoms such as fatigue, dizziness, or syncope, but it does not indicate cardiac tamponade.

Choice C Reason: This choice is incorrect because sudden lethargy is not a specific sign of cardiac tamponade. Lethargy is a condition in which the person feels tired, sluggish, or drowsy. It may be caused by various factors such as sleep deprivation, depression, infection, anemia, or hypoglycemia. It may aﬀect the person's mental and physical performance, but it does not indicate cardiac tamponade.

Choice D Reason: This choice is correct because muﬄed heart sounds are a sign of cardiac tamponade. Muﬄed heart sounds are heart sounds that are fainter or softer than normal due to reduced transmission of sound waves through ﬂuid-filled pericardial sac. They may indicate that the heart function is compromised by cardiac tamponade and require immediate intervention such as pericardiocentesis (removal of ﬂuid from pericardial sac).

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A nurse is admitting a client who has acute heart failure following myocardial infarction (MI). The nurse recognizes that which of the following prescriptions by the provider requires clarification?

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