Correct Answer: D

Rationale: Postoperative care should focus on monitoring changes in stooling patterns, which could indicate complications such as stenosis or obstruction. It is crucial to educate the family on the importance of promptly reporting any changes in stooling patterns to the healthcare provider. Options A and B are not recommended unless specifically ordered by the physician as they can potentially cause harm or discomfort postoperatively. Option C may not be appropriate immediately after surgery and should be guided by the healthcare provider's recommendations.

Correct Answer: B

Rationale: The correct answer is B: Increased protein. Children with Crohn's disease require a diet high in protein to support growth and tissue repair. High fiber should be avoided as it can exacerbate symptoms of Crohn's disease. Reducing calories can lead to malnutrition, which is detrimental in this condition. Herbal supplements should be used cautiously and only under medical advice as they may interact with medications or worsen symptoms.

Correct Answer: C

Rationale: The correct answer is C: Urine output. Assessing urine output is a recommended method to determine hydration status in infants. Adequate urine output indicates good hydration, while decreased urine output may suggest dehydration. Capillary refill time (Choice A) is more indicative of circulatory status rather than hydration. Skin turgor (Choice B) is a useful assessment in adults but can be less reliable in infants. Checking mucous membranes (Choice D) can provide some information on hydration, but it is not as reliable as assessing urine output in infants.

Correct Answer: D

Rationale: The correct answer is D: Prepare for surgery. Acute appendicitis is a surgical emergency that requires prompt removal of the appendix to prevent complications like rupture and peritonitis. Administering antibiotics (choice A) may be part of the treatment plan but should not delay surgical intervention. Applying heat to the abdomen (choice B) is not recommended as it can worsen the inflammation of the appendix. Encouraging oral fluids (choice C) is generally beneficial, but the priority in acute appendicitis is surgical intervention.

Correct Answer: B

Rationale: The primary concern with untreated vesicoureteral reflux (VUR) in pediatric patients is chronic renal failure. Untreated VUR can lead to this complication due to recurrent urinary tract infections and kidney damage. While recurrent UTIs (Choice A) are a common consequence of VUR, the ultimate worry is the development of chronic renal failure. Hypertension (Choice C) may occur as a result of renal damage but is not the primary concern. Bladder dysfunction (Choice D) is not the most significant consequence of untreated VUR in terms of long-term outcomes compared to chronic renal failure.