The nurse is caring for a boy with probable intussusception. He had diarrhea before admission, but while waiting for the administration of air pressure to reduce the intussusception, he passes a normal brown stool. Which nursing action is the most appropriate?

Correct Answer: A

Rationale: The passage of a normal brown stool in a child with intussusception could indicate spontaneous reduction of the intussusception. This change in the patient's condition is significant, requiring prompt notification of the practitioner for further evaluation and management. While measuring abdominal girth (Choice B) is important for assessing abdominal distention, it is not the priority when a potential spontaneous reduction may have occurred. Auscultating for bowel sounds (Choice C) and taking vital signs, including blood pressure (Choice D), are routine nursing assessments but do not address the immediate need to inform the practitioner of a possible change in the patient's condition that necessitates urgent attention.

Correct Answer: B

Rationale: After corrective surgery for hypertrophic pyloric stenosis (HPS), placing the infant in an infant seat is the correct action to take immediately after feeding to limit vomiting. This position helps keep the head elevated, reducing the risk of vomiting. Rocking the infant (Choice A) may agitate the stomach and increase the likelihood of vomiting. Placing the infant flat on the right side (Choice C) is not recommended as it does not encourage proper digestion and may increase the risk of vomiting. Keeping the infant awake with sensory stimulation (Choice D) does not address the positioning concern related to vomiting in this specific post-operative scenario.

Correct Answer: B

Rationale: Rectal biopsy is the definitive diagnostic procedure for Hirschsprung disease in infants. It confirms the absence of ganglion cells in the affected bowel segment, which is characteristic of Hirschsprung disease. Colonoscopy (Choice A) is not typically used for confirmation as it may not provide a definitive result. Multiple saline enemas (Choice C) are utilized in the treatment of meconium ileus, a complication of cystic fibrosis, and not in the diagnosis of Hirschsprung disease. Fiberoptic nasoenteric tube (Choice D) is not a diagnostic tool for Hirschsprung disease; it is commonly used for gastrointestinal decompression or feeding purposes but does not confirm the diagnosis.

Correct Answer: B

Rationale: The correct answer is B. Myelination occurs in a cephalocaudal (head-to-toe) pattern, improving nerve function progressively. Choice A is incorrect as myelination continues into adolescence and beyond, not just during childhood. Choice C is incorrect because myelination actually increases the speed of nerve impulses rather than decreasing it. Choice D is incorrect as myelination enhances the specificity of nerve impulses, making them more efficient and precise rather than less specific.

Correct Answer: C

Rationale: The correct answer is C: Osgood-Schlatter disease. This condition is a common overuse injury that affects the knee. Osgood-Schlatter disease typically occurs in children and adolescents who are involved in activities that require frequent running, jumping, and kicking. It is characterized by pain, swelling, and tenderness at the tibial tuberosity, where the patellar tendon inserts into the tibia. Choice A, Dislocated radial head, is not an overuse disorder but rather a form of elbow injury where the head of the radius bone is displaced from its normal position. Choice B, Transient synovitis of the hip, is a self-limiting condition that causes hip pain and limping in children. It is not typically considered an overuse disorder. Choice D, Scoliosis, is a condition characterized by an abnormal lateral curvature of the spine. While it may be related to certain activities or postures, it is not primarily classified as an overuse disorder.