Correct Answer: B

Rationale: To prevent clogging when using high-viscosity formulas in a small-bore jejunostomy, the nurse should flush the tubing with 10 mL of water every 6 hours. This action helps maintain tube patency and prevent blockages. Replacing the bag and tubing every 24 hours (Choice A) is unnecessary and does not specifically address preventing clogging. Administering the feeding by gravity drip (Choice C) or heating the formula prior to infusion (Choice D) are not effective interventions for preventing tubing clogging.

Correct Answer: A

Rationale: Administering enteral feedings is crucial for ensuring adequate nutrition and supporting healing in toddlers with extensive burns. Burns over 50% total body surface area can lead to increased metabolic demands, making it essential to provide nutrition through enteral feedings to meet the child's needs for healing and recovery. Limiting intake of vitamin C or dietary protein would be detrimental in this scenario as the child requires increased amounts of nutrients to support healing. Administering insulin prior to meals is not indicated in this case as the priority is to provide adequate nutrition to promote healing.

Correct Answer: D

Rationale: A low-protein diet should be followed for three months before conception in individuals with PKU who are planning a pregnancy. This diet helps manage PKU by reducing phenylalanine levels, which is crucial for maternal and fetal health. Choices A, B, and C are incorrect. Choice A is not directly related to managing PKU, choice B focuses on a different aspect of care during pregnancy, and choice C is inaccurate as breastfeeding will not prevent a baby from developing PKU.

Correct Answer: D

Rationale: Yogurt is the correct answer because it contains probiotics that can help restore normal gut flora and reduce antibiotic-associated diarrhea. Whole wheat bread (Choice A) may worsen diarrhea due to its high fiber content. Fresh orange sections (Choice B) are acidic and may irritate the digestive system further. Ice cream (Choice C) is high in sugar and fat, which can exacerbate diarrhea.

Correct Answer: B

Rationale: To prevent clogging when using high-viscosity formulas in a small-bore jejunostomy, the nurse should flush the tubing with 10 mL of water every 6 hours. This action helps maintain tube patency and prevent blockages. Replacing the bag and tubing every 24 hours (Choice A) is unnecessary and does not specifically address preventing clogging. Administering the feeding by gravity drip (Choice C) or heating the formula prior to infusion (Choice D) are not effective interventions for preventing tubing clogging.