A nurse is caring for an infant who has a congenital heart defect. Which of the following defects is associated with increased pulmonary blood flow?
Coarctation of the aorta
Patent ductus arteriosus
Tetralogy of Fallot
Tricuspid atresia
The Correct Answer is B
A patent ductus arteriosus (PDA) is a congenital heart defect associated with increased pulmonary blood flow. In normal fetal circulation, the ductus arteriosus allows blood to bypass the lungs since the baby receives oxygen from the mother's placenta. After birth, the ductus arteriosus should close, redirecting blood flow to the lungs for oxygenation. However, in some infants with PDA, the ductus arteriosus remains open, causing an abnormal connection between the aorta and the pulmonary artery. As a result, oxygenated blood from the aorta flows back into the pulmonary artery, increasing the workload on the lungs.
The other options are as follows:
A. Coarctation of the aorta - Coarctation of the aorta is a narrowing of the aorta, which obstructs blood flow and leads to increased blood pressure in the upper body and reduced blood flow to the lower body.
C. Tetralogy of Fallot - Tetralogy of Fallot is a combination of four heart defects that results in decreased pulmonary blood flow due to a ventricular septal defect (VSD), overriding aorta, pulmonary stenosis, and right ventricular hypertrophy.
D. Tricuspid atresia - Tricuspid atresia is a congenital heart defect where the tricuspid valve does not develop correctly, resulting in an absent or abnormal tricuspid valve. This defect prevents blood flow from the right atrium to the right ventricle and, therefore, reduces pulmonary blood flow.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
During a sickle cell crisis, the child experiences severe pain due to the sickled red blood cells blocking blood flow in the vessels, leading to tissue ischemia and infarction. Pain is the hallmark symptom of sickle cell crisis and can occur in various parts of the body, such as the abdomen, chest, back, joints, and extremities.
A. Constipation is not a common symptom of sickle cell crisis. It may be associated with other conditions but is not directly related to sickle cell crisis.
C. High fever is not a typical finding in sickle cell crisis. Fever may occur due to infections, which individuals with sickle cell disease are at increased risk of developing, but it is not a direct symptom of the crisis itself.
D. Bradycardia (slow heart rate) is not commonly associated with sickle cell crisis. Tachycardia (rapid heart rate) may occur in response to pain, but bradycardia is not a typical finding.
Correct Answer is C
Explanation
A. Broth: While broth can be a source of fluids, it does not contain the appropriate balance of electrolytes needed to rehydrate the body effectively. Gastroenteritis can cause significant fluid and electrolyte loss, so an oral rehydration solution (ORS) with the right proportions of salts and sugars is essential to replace these losses adequately.
B. Diluted apple juice: Diluted apple juice may not provide the proper electrolyte balance needed for rehydration in cases of gastroenteritis. In fact, apple juice is not recommended during episodes of acute gastroenteritis, as it can worsen diarrhea due to its high sugar content. This can lead to further dehydration and discomfort.
C. Oral rehydration solution (ORS): This is the correct answer. Oral rehydration solution is specifically designed to replace lost fluids and electrolytes in cases of gastroenteritis. It contains the right balance of salts and sugars to facilitate effective absorption in the intestines and help rehydrate the body. ORS is the recommended fluid for managing dehydration caused by gastroenteritis in children.
D. Water: While water is essential for hydration, it is not enough to effectively treat dehydration caused by gastroenteritis. Plain water does not contain the necessary electrolytes like sodium, potassium, and chloride, which are lost during episodes of diarrhea and vomiting. Giving water alone may not adequately rehydrate the child and could potentially worsen the dehydration.
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