An infant is experiencing dyspnea related to patent ductus arteriosus (PDA). The nurse understands dyspnea occurs because blood
Shunted past the pulmonary circulation, causing pulmonary hypoxia
Circulated through the lungs again, causing pulmonary circulatory congestion
Circulated through the ductus from the pulmonary artery to the aorta bypassing the left side of me heart
Shunted past cardiac arteries, causing myocardial hypoxia
The Correct Answer is C
A. Shunted past the pulmonary circulation, causing pulmonary hypoxia: This option is not the primary reason for dyspnea in PDA. While there is shunting, it doesn't directly cause pulmonary hypoxia.
B. Circulated through the lungs again, causing pulmonary circulatory congestion: This option is partially correct but does not address the primary reason for dyspnea, which is the bypassing of the left side of the heart.
C. Circulated through the ductus from the pulmonary artery to the aorta, bypassing the left side of the heart.
In patent ductus arteriosus (PDA), a fetal blood vessel called the ductus arteriosus fails to close after birth. This allows oxygenated blood from the left atrium to be shunted directly from the aorta to the pulmonary artery, bypassing the normal route through the left side of the heart and into the systemic circulation. The shunting of oxygenated blood back into the pulmonary circulation can lead to increased pulmonary blood flow and circulatory congestion, causing symptoms such as dyspnea.
D. Shunted past cardiac arteries, causing myocardial hypoxia: PDA primarily affects the pulmonary circulation and left side of the heart, not the coronary arteries. Myocardial hypoxia is not the primary mechanism of dyspnea in PDA.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Increased pulse rate.
Iron deficiency anemia can lead to a reduced oxygen-carrying capacity in the blood. As a compensatory mechanism, the heart may pump faster to deliver more oxygen to tissues. This can result in an increased pulse rate. Children with iron deficiency anemia may also experience weakness, fatigue, and pallor.
B. Increased blood pressure is not a common symptom of iron deficiency anemia. In fact, iron deficiency anemia can often lead to lower blood pressure due to the reduced oxygen-carrying capacity of the blood.
C. Warm skin is not a typical symptom of iron deficiency anemia. Skin temperature may not be directly affected by this condition.
D. Cyanosis of the nail beds is not a symptom of iron deficiency anemia. Cyanosis refers to bluish discoloration of the skin or mucous membranes due to reduced oxygen levels in the blood, which is more commonly associated with respiratory or cardiovascular issues. Iron deficiency anemia primarily affects the oxygen-carrying capacity of the blood but does not lead to cyanosis.
Correct Answer is C
Explanation
A. Dress the child in woolen clothes during cold months: Wool can be irritating to the skin and may worsen eczema symptoms. Cotton or soft fabrics are typically better choices.
B. Launder the child's clothing with fabric softener: Fabric softeners often contain chemicals that can irritate the skin. It's best to use fragrance-free and hypoallergenic detergents and skip fabric softeners.
C. Apply a topical corticosteroid ointment to the affected area.
When teaching a parent of a preschooler with eczema, it's essential to provide guidance on appropriate treatments. Applying a topical corticosteroid ointment is an effective approach for managing eczema symptoms. These medications can help reduce inflammation and itching, which are common in eczema. However, it's crucial for the parent to use them as directed by a healthcare provider and not excessively.
D. Give the child a bubble bath every day: Frequent bathing, especially with bubble baths, can dry out the skin and worsen eczema. It's usually better to limit baths and use gentle, fragrance-free cleansers.
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