Which sign is indicative of developmental dysplasia of the hip in infants?

Correct Answer: A

Rationale: The Ortolani sign is a specific maneuver used during physical examination to detect hip instability or dislocation in infants. A positive Ortolani sign, where the hip is felt to slip back into the socket, is indicative of developmental dysplasia of the hip, a condition that can lead to long-term disability if not treated early. Romberg sign is used to assess sensory ataxia, Trendelenburg sign indicates weakness of the hip abductor muscles, and Gower's sign is seen in children with proximal muscle weakness climbing up their own body from a supine position due to conditions like muscular dystrophy.

Correct Answer: A

Rationale: The correct answer is A: Tetralogy of Fallot. Tetralogy of Fallot, a congenital heart defect with four distinct abnormalities, often presents with a "boot-shaped" heart on chest x-ray due to right ventricular hypertrophy. This characteristic finding is due to the specific combination of defects in this condition. Coarctation of the aorta (choice B), Transposition of the great arteries (choice C), and Ventricular septal defect (choice D) do not typically result in a "boot-shaped" heart on a chest x-ray like Tetralogy of Fallot does.

Correct Answer: B

Rationale: The correct answer is B, Intravenous immunoglobulin (IVIG). IVIG is the primary treatment for Kawasaki disease, an acute vasculitis that mainly affects children under 5 years old. Early administration of IVIG is crucial as it helps reduce the risk of coronary artery aneurysms, which is the most serious complication of Kawasaki disease. Corticosteroids (Choice A) are not the primary treatment for Kawasaki disease and are not recommended due to potential adverse effects. Antibiotics (Choice C) are not indicated for the treatment of Kawasaki disease as it is not caused by a bacterial infection. Antivirals (Choice D) are also not part of the standard treatment for Kawasaki disease, as it is not caused by a viral infection.

Correct Answer: A

Rationale: Dry mucous membranes are a common sign of moderate dehydration in children, indicating a loss of bodily fluids. When a child is moderately dehydrated, the mucous membranes in the mouth and nose may appear dry. This condition can occur due to various factors such as vomiting, diarrhea, or inadequate fluid intake. Normal capillary refill (choice B) is not typically associated with dehydration; it is a measure of circulatory status. Hyperactive bowel sounds (choice C) can be present in conditions like gastroenteritis but are not specific to dehydration. Edema (choice D) is the retention of fluid in the body and is not a typical sign of dehydration.

Correct Answer: C

Rationale: The correct answer is C: Side-lying. The side-lying position is recommended after a tonsillectomy to facilitate drainage of secretions and reduce the risk of aspiration. This position helps prevent blood from pooling in the back of the throat, decreasing the chance of bleeding postoperatively. Supine (lying face up), while commonly used in other situations, may not be ideal immediately after a tonsillectomy due to the risk of airway obstruction from blood clots. Prone (lying face down) is not recommended as it can hinder breathing and increase the risk of complications. Fowler's position (semi-sitting) is also not typically used after a tonsillectomy because it may cause discomfort and hinder proper drainage.