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 B
Explanation
The reticulocyte count is a measure of young, immature red blood cells. An elevated reticulocyte count indicates the bone marrow's ability to respond to anemia by producing new red blood cells.
For an infant, a reticulocyte count of 8% would be an indicator of severe anemia. An elevated reticulocyte count suggests the body is trying to compensate for the decreased number of mature red blood cells by producing more young ones. This is often seen in severe anemia as the body attempts to increase the red blood cell count.
The other options (A, C, and D) represent normal or less severe reticulocyte counts.
A reticulocyte count of 3% is within the normal range.
A reticulocyte count of 0.5% is on the lower side but not as severe as 8%.
A reticulocyte count of 5% indicates a response to anemia but is not as elevated as 8%.
Correct Answer is C
Explanation
Options A (increased ability of tissue to retain fluid) and B (reduced blood pressure) are not typical signs of improvement in Nephrotic Syndrome. The primary focus is on reducing protein loss and alleviating edema.
Option C. Increased diuresis and decreased protein loss in urine.
Nephrotic Syndrome is characterized by increased urinary protein loss, resulting in hypoalbuminemia, edema, and other symptoms. Improvement in Nephrotic Syndrome is typically indicated by:
Increased diuresis: An increase in urine output suggests that the child is excreting excess fluid, which can help reduce edema (swelling).
Decreased protein loss in urine: A reduction in proteinuria (loss of protein in the urine) is a positive sign, as it indicates that the damaged kidney glomeruli are functioning more effectively in retaining protein.
Option D (decreased protein levels in serum) is also not a clear sign of improvement. While it may be related to reduced protein loss in urine, it does not directly reflect the overall improvement of the condition. Monitoring protein levels in the urine (proteinuria) is a more specific indicator of Nephrotic Syndrome management.
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