Which best describes a full-thickness (third-degree) burn?

Correct Answer: C

Rationale: A full-thickness (third-degree) burn involves the destruction of all layers of skin, including the epidermis, dermis, and extending into the subcutaneous tissue. This type of burn results in significant tissue damage and can appear pale, charred, or leathery. Choice A is incorrect as erythema and pain are more characteristic of superficial burns. Choice B describes a partial-thickness burn where the skin shows erythema followed by blister formation, involving the epidermis and part of the dermis. Choice D is incorrect as it describes a deeper type of injury involving structures beyond the skin layers, such as muscle, fascia, and bone, which is not specific to a full-thickness burn.

Correct Answer: C

Rationale: In acute glomerulonephritis, weight loss is most likely due to the reduction of edema. Edema is a common symptom of glomerulonephritis, which causes fluid retention and swelling in the body. As treatment progresses and the condition improves, the reduction of edema leads to weight loss. Choices A, B, and D are incorrect as they do not directly address the underlying pathophysiology of acute glomerulonephritis and its impact on weight loss.

Correct Answer: A

Rationale: The correct first intervention when managing a child with diabetic ketoacidosis is to begin intravenous saline solution to address dehydration and restore electrolyte balance. Rehydration is essential to improve perfusion and correct electrolyte imbalances. Administering insulin without addressing dehydration can potentially lead to further complications. Placing the child on a cardiac monitor or pulse oximetry monitor is important but not the initial priority in managing DKA.

Correct Answer: C

Rationale: The priority nursing action after a corrective surgery for hypertrophic pyloric stenosis (HPS) is to assess the IV site for infiltration. This is crucial to ensure proper fluid administration and prevent complications such as extravasation or infiltration. Applying restraints (Choice A) is not indicated in this scenario and can compromise the infant's comfort and safety. Administering a mild sedative (Choice B) is not necessary and should only be done based on specific clinical indications. Attaching the nasogastric tube to wall suction (Choice D) may be important for certain conditions but is not the priority immediately post-surgery; assessing the IV site is more urgent to prevent potential complications related to IV therapy.

Correct Answer: B

Rationale: Colicky behavior in infants is primarily characterized by paroxysmal abdominal pain, resulting in excessive crying and fussiness. The pain episodes are often unpredictable and can be distressing for both the infant and the parents. Inadequate peristalsis (Choice A) refers to weak or ineffective bowel movements and is not the typical cause of colic. While some infants may experience colic due to an allergic response to certain proteins in milk (Choice C), this is not the primary cause of colic behavior in all infants. Choice D, a protective mechanism designed to eliminate foreign proteins, is not a recognized cause of colic. Therefore, the correct explanation for the cause of colicky behavior in infants is paroxysmal abdominal pain.