A client with acute heart failure is receiving dobutamine. What is the desired effect of this drug in a patient with heart failure?
Decreased cardiac arrhythmias.
Increased myocardial contractility.
Decreased electrical conductivity in the heart.
Dilated coronary arteries.
The Correct Answer is B
Choice A reason: Decreased cardiac arrhythmias are not the primary desired effect of dobutamine in heart failure patients. While dobutamine can have some effects on heart rhythm, its main action is to increase the strength of the heart's contractions.
Choice B reason: Increased myocardial contractility is the correct and desired effect of dobutamine. Dobutamine is a positive inotropic agent, meaning it increases the force of the heart's contractions. This is particularly beneficial in heart failure patients as it helps improve cardiac output and the effectiveness of the heart as a pump, thus alleviating symptoms of heart failure and improving organ perfusion.
Choice C reason: Decreased electrical conductivity in the heart is not an effect of dobutamine. In fact, dobutamine can increase the risk of arrhythmias due to its stimulating effects on the heart. The drug works by enhancing the contractility of the heart muscle rather than altering the electrical conduction system.
Choice D reason: Dilated coronary arteries are not a primary effect of dobutamine. While the drug may have some vasodilatory properties, especially at higher doses, its primary role is to enhance myocardial contractility rather than directly dilate the coronary arteries.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: An epidural hematoma is a type of traumatic brain injury where blood accumulates between the dura mater and the skull. While it can cause severe symptoms, including headache, loss of consciousness, and neurological deficits, it does not typically present with ecchymosis behind the ears (Battle's sign) or bleeding from the ears. These signs are more indicative of a basilar skull fracture.
Choice B reason: An ischemic stroke occurs when a blood clot blocks or narrows an artery leading to the brain, causing reduced blood flow and oxygen to the brain tissue. Symptoms of an ischemic stroke include sudden weakness, numbness, difficulty speaking, and vision problems. However, it does not cause ecchymosis behind the ears or bleeding from the ears, which are specific signs of a basilar skull fracture.
Choice C reason: A subarachnoid hemorrhage is bleeding into the space between the brain and the tissue covering the brain (subarachnoid space). It often presents with a sudden, severe headache, nausea, vomiting, and loss of consciousness. While it is a serious condition, it does not typically cause ecchymosis behind the ears or bleeding from the ears.
Choice D reason: A basilar skull fracture is
The correct answer. This type of fracture involves the base of the skull and can cause characteristic signs such as ecchymosis behind the ears (Battle's sign) and bleeding from the ears due to the proximity of the fracture to the auditory canal and other structures. These symptoms are key indicators of a basilar skull fracture and require immediate medical attention.
Correct Answer is A
Explanation
Choice A reason: Maintaining nothing by mouth (NPO) and administering intravenous fluids is the best intervention to reduce discomfort in a patient with acute pancreatitis. NPO status helps to rest the pancreas by preventing the secretion of pancreatic enzymes that can exacerbate inflammation and pain. Intravenous fluids are essential to maintain hydration and electrolyte balance while the patient is not eating or drinking.
Choice B reason: Providing small, frequent feedings with no concentrated sweets is not appropriate for a patient with acute pancreatitis. The priority is to keep the patient NPO to rest the pancreas. Introducing any food can stimulate the pancreas and worsen the condition.
Choice C reason: Administering morphine sulfate intramuscularly every 4 hours as needed can help manage pain, but the preferred route for pain medication in acute pancreatitis is intravenous, as it provides quicker relief and avoids the discomfort of intramuscular injections. Pain management is important, but it should be part of a broader plan that includes NPO status and IV fluids.
Choice D reason: Positioning the patient in a flat, supine position is not recommended for reducing discomfort in acute pancreatitis. Patients often find relief in a semi-Fowler's position (head elevated) or by leaning forward, which can help reduce abdominal pain and pressure on the inflamed pancreas.
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