A six-month-old infant is hospitalized for repair of a ventricular septal defect. As you are doing his physical exam, you note that the infant's extremities are cool, he has weak peripheral pulses, and his urine output is diminished. These clinical findings are suggestive of which of the following?
Increased stroke volume
Cardiac arrhythmia
Decreased cardiac output
Cyanosis
The Correct Answer is C
Choice A reason: Increased stroke volume is not a correct answer as it means that the heart pumps more blood with each contraction. This would result in increased blood pressure and perfusion, not cool extremities, weak pulses, and low urine output.
Choice B reason: Cardiac arrhythmia is not a correct answer as it means that the heart beats irregularly or abnormally. This can cause palpitations, chest pain, or fainting, but not necessarily cool extremities, weak pulses, and low urine output.
Choice C reason: Decreased cardiac output is a correct answer as it means that the heart pumps less blood than the body needs. This can result from a ventricular septal defect, which causes blood to shunt from the left ventricle to the right ventricle, reducing the amount of oxygenated blood that reaches the tissues. This can cause cool extremities, weak pulses, and low urine output, as well as fatigue, poor growth, and shortness of breath.
Choice D reason: Cyanosis is not a correct answer as it means that the skin, lips, or nails turn blue due to low oxygen levels in the blood. This can occur in some cases of ventricular septal defect, especially if there is pulmonary hypertension or a reversal of the shunt. However, cyanosis is not a direct cause of cool extremities, weak pulses, and low urine output.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: Using a night-light can provide a sense of security and comfort for a child, especially if they are afraid of the dark. This can help prevent sleep problems by reducing fear and anxiety at bedtime¹.
Choice B reason: While it's true that certain foods can promote sleep, high-carbohydrate snacks before bedtime are not recommended. They can lead to energy spikes and crashes, which can disrupt sleep¹.
Choice C reason: While it's important for the sleep environment to be calming and conducive to sleep, it doesn't always have to be completely quiet and dark. Some children may find a completely dark room scary, and some background noise can actually be soothing¹.
Choice D reason: The need for naps varies greatly among children. Some 4-year-olds may still benefit from an afternoon nap. Eliminating the nap can lead to overtiredness, which can actually make it harder for the child to fall asleep at night¹.
Correct Answer is B
Explanation
Choice A reason: This is not a good choice. Delaying dental visits until the child's heart defect is fully repaired is not a recommended practice. Dental hygiene is important for preventing oral infections that can spread to the bloodstream and cause infective endocarditis. The child should have regular dental check-ups and cleanings, as well as good oral care at home.
Choice B reason: This is the correct choice. Administration of antibiotics one hour prior to all dental procedures is a critical teaching point to emphasize for parents of a child with a complex congenital heart defect. Dental procedures can cause bleeding and bacteria to enter the bloodstream, which can infect the damaged or abnormal heart valves and cause infective endocarditis. Antibiotics can prevent or reduce the risk of this complication by killing the bacteria before they reach the heart.
Choice C reason: This is not a good choice. Administration of daily prophylactic antibiotics is not a necessary or effective measure for preventing infective endocarditis in a child with a complex congenital heart defect. Daily antibiotics can cause side effects, such as allergic reactions, diarrhea, or yeast infections. They can also lead to antibiotic resistance, which can make the bacteria harder to treat if they do cause an infection.
Choice D reason: This is not a good choice. High dose IV antibiotics for 2-8 weeks is not a preventive strategy for infective endocarditis, but a treatment option for an established infection. IV antibiotics are given to eradicate the bacteria from the bloodstream and the heart valves and prevent further damage or complications. However, IV antibiotics are not always effective and may have serious s
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