Correct Answer: A

Rationale: Infection is the greatest risk for an infant with exstrophy of the bladder due to the exposure of the bladder and surrounding tissues. The bladder mucosa and adjacent tissues being exposed increase the susceptibility to infections. Dehydration (Choice B) is not the primary concern in this condition. Urinary retention (Choice C) is less likely as exstrophy of the bladder usually presents with constant dribbling of urine. Intestinal obstruction (Choice D) is not directly related to exstrophy of the bladder.

Correct Answer: A

Rationale: Placing the infant on their back to sleep is the correct recommendation to reduce the risk of sudden infant death syndrome (SIDS). This sleep position has been shown to significantly decrease the incidence of SIDS. Using a pacifier during sleep (Choice B) can also help reduce the risk, but it is secondary to the back sleeping position. Having the infant sleep on their side (Choice C) is not recommended, as it increases the risk of SIDS. Keeping the infant's room cool (Choice D) may provide a comfortable sleeping environment but does not directly reduce the risk of SIDS.

Correct Answer: B

Rationale: The primary purpose of a lumbar puncture is to obtain a sample of cerebrospinal fluid for analysis. This sample helps in diagnosing conditions such as meningitis by evaluating the presence of pathogens or abnormalities in the cerebrospinal fluid. Measuring the pressure of cerebrospinal fluid (Choice A) is not the main objective of a lumbar puncture, although it can be done during the procedure. Relieving intracranial pressure (Choice C) is not the direct purpose of a lumbar puncture, as other interventions are typically used for this purpose. Assessing the presence of infection in the spinal fluid (Choice D) is related to the overall goal of obtaining a sample for analysis, making it a secondary outcome of the procedure.

Correct Answer: A

Rationale: The correct answer is to monitor for signs of infection. When a child is undergoing chemotherapy, their immune system is compromised, making them more susceptible to infections. Monitoring for signs of infection is crucial to promptly identify and treat any potential infections. Choices B, C, and D are incorrect because although monitoring for bleeding, dehydration, and pain are important aspects of care, the priority for a child receiving chemotherapy is to prevent and detect infections due to their increased vulnerability.

Correct Answer: A

Rationale: The correct answer is administering pancreatic enzymes. In cystic fibrosis, there is a deficiency in pancreatic enzymes, leading to poor digestion and malabsorption of nutrients. Administering pancreatic enzymes is essential to ensure proper digestion and absorption of nutrients. Providing respiratory therapy and nutritional support are important aspects of care for a child with cystic fibrosis, but addressing the pancreatic enzyme deficiency takes priority in this scenario. Encouraging physical activity is beneficial for overall health but is not the priority intervention in this case.