Correct Answer: D

Rationale: The classification is problematic because children with acyanotic heart defects may develop cyanosis, complicating the differentiation between acyanotic and cyanotic defects. Choice A is incorrect because the system is not solely based on explaining hemodynamics. Choice B is incorrect because the classification is not based on the ease of identifying children with cyanotic defects. Choice C is incorrect because cyanosis can indeed be present in children with congenital heart defects, especially acyanotic defects that may lead to cyanosis under certain circumstances.

Correct Answer: D

Rationale: While catheterization can be uncomfortable, it does not typically result in long-term psychological harm, and obtaining a sterile specimen is important for accurate diagnosis.

Correct Answer: A

Rationale: The correct answer is A: Teaching proper care procedures. In this scenario, focusing on teaching the mother proper care procedures is crucial as she is the nurturer in the family and will likely be the primary caregiver for the child. This will empower her to provide appropriate care and support for her daughter during the recovery process. Choices B, C, and D are not the most appropriate activities for the mother in this situation. Dealing with insurance coverage, determining treatment success, and transmitting information to family members are important but not as directly relevant to the immediate care needs of the child's broken arm.

Correct Answer: A

Rationale: The priority nursing intervention when caring for a child with sickle cell anemia is administering pain medication. Pain management is crucial in sickle cell anemia due to vaso-occlusive crises that can cause severe pain. While ensuring adequate hydration, providing nutritional support, and monitoring vital signs are important aspects of care for a child with sickle cell anemia, addressing the pain with appropriate medication takes precedence to alleviate the child's suffering and improve their quality of life.

Correct Answer: D

Rationale: A common clinical manifestation of bacterial meningitis is a positive Kernig sign, which indicates meningeal irritation. Kernig sign is elicited when the leg is bent at the hip and knee at 90-degree angles, and pain and resistance are felt with extension at the knee due to inflamed meninges. Options A, B, and C are not typically associated with bacterial meningitis. A rash is more commonly seen in viral illnesses, photophobia can be present but is not specific to bacterial meningitis, and jaundice is not a typical clinical manifestation of this condition.