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 D
Explanation
Cystic fibrosis (CF) is a genetic disorder that affects the production and function of certain glands, particularly those that produce mucus and sweat. One of the key aspects of CF management is addressing the pancreatic insufficiency that occurs in many individuals with CF. Due to the impairment of the pancreas, children with CF may have difficulty digesting food properly, especially fats. This can lead to malabsorption of nutrients, poor weight gain, and other nutritional deficiencies.
Pancreatic enzyme replacement therapy is a crucial part of CF management. Pancreatic enzymes are prescribed to help the child digest and absorb essential nutrients, especially fats. The enzymes are typically given with each meal and snack to aid in the breakdown and absorption of nutrients.
The other options are not correct:
A. "We will restrict the amount of salt in our child's food."
Sodium restriction is generally not a focus in CF management unless there are specific indications for it. CF patients may have increased salt losses in sweat, but dietary sodium restriction is not a primary aspect of their care.
B. "I will limit my child's fluid intake."
Fluid intake is important for children with CF to maintain hydration and prevent dehydration. There is no specific need to limit fluid intake unless there are individualized medical reasons for doing so.
C. "I will prepare low-fat meals with limited protein for my child."
Children with CF often require a high-calorie, high-protein diet to maintain adequate nutrition and growth. Restricting fat and protein intake is not typically recommended, as these nutrients are essential for a child's development and well-being. Instead, pancreatic enzymes are used to aid in the digestion and absorption of fats and other nutrients.
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