A nurse is collecting data from an infant who has coarctation of the aorta. Which of the following manifestations should the nurse expect?
Machine-like murmur
Severe cyanosis
Decreased blood pressure in the legs
Pulmonary edema
The Correct Answer is C
A. Machine-like murmur:
A machine-like murmur typically refers to a continuous murmur, which can be heard throughout systole and diastole. While machine-like murmurs can be associated with certain cardiac conditions, such as patent ductus arteriosus (PDA), they are not typically heard in coarctation of the aorta. In coarctation of the aorta, a systolic ejection murmur may be heard over the upper left sternal border due to turbulent blood flow across the narrowed aortic segment.
B. Severe cyanosis:
Cyanosis refers to a bluish discoloration of the skin and mucous membranes due to decreased oxygenation of the blood. While cyanosis can occur in various congenital heart defects, such as tetralogy of Fallot, it is not a characteristic manifestation of coarctation of the aorta. Coarctation of the aorta typically results in decreased blood flow to the lower extremities rather than mixing of oxygenated and deoxygenated blood.
C. Decreased blood pressure in the legs:
This is the correct choice. Coarctation of the aorta is characterized by narrowing of the aorta, which leads to decreased blood flow to the lower extremities. Consequently, blood pressure measurements in the legs may be lower compared to those in the arms. This finding is often a key indicator of coarctation of the aorta.
D. Pulmonary edema:
Pulmonary edema refers to the accumulation of fluid in the lungs and is typically associated with conditions such as heart failure or fluid overload. While some congenital heart defects may lead to heart failure and subsequent pulmonary edema, coarctation of the aorta does not directly cause pulmonary edema. Instead, it primarily affects blood flow to the lower extremities due to the narrowing of the aorta.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Obtain a throat culture.
This option is not appropriate as a primary nursing action in the acute management of epiglottitis. While obtaining a throat culture may be necessary for diagnostic purposes, it is not a priority in the immediate care of a child with suspected epiglottitis. The focus should be on ensuring airway patency and providing emergency treatment.
B. Visualize the epiglottis using a tongue depressor.
This option is contraindicated in the acute management of epiglottitis. Direct visualization of the epiglottis using a tongue depressor or other instruments can provoke spasm of the epiglottis and worsen airway obstruction. Attempting to visualize the epiglottis should be avoided until the child's airway has been secured in a controlled environment, such as in the operating room under anesthesia.
C. Provide moist air to reduce the inflammation of the epiglottis.
This option is appropriate. Providing moist air, such as humidified oxygen or a cool mist, can help soothe the inflamed tissues of the epiglottis and upper airway. Moist air may help alleviate discomfort and reduce inflammation, although it will not directly address the risk of airway obstruction. It is often used as supportive therapy in conjunction with other interventions.
D. Initiate airborne precautions.
This option is not necessary for the care of a child with epiglottitis. Epiglottitis is not typically transmitted through airborne droplets. The priority in the management of epiglottitis is ensuring a patent airway and providing appropriate treatment to reduce inflammation and prevent complications.
Correct Answer is ["5.4"]
Explanation
Convert the child's weight from pounds (lb) to kilograms (kg):
20 lb × (1 kg / 2.20462 lb) ≈ 9.07 kg
Calculate the total daily dose of cefazolin:
Total daily dose = 30 mg/kg/day × 9.07 kg = 272.1 mg/day
Divide the total daily dose into two equal doses:
Each dose = 272.1 mg / 2 ≈ 136.05 mg
Determine the dose per ml using the available oral suspension concentration:
125 mg/5 ml = 25 mg/ml
Calculate the volume of oral suspension needed for each dose:
Volume per dose = Dose per dose / Concentration per ml
≈ 136.05 mg / 25 mg/ml
≈ 5.44 ml
So, the child should receive approximately 5.44 ml per dose of cefazolin oral suspension.
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