A six-month-old infant is hospitalized for repair of a ventricular septal defect. As you are doing his physical exam, you note that the infant's extremities are cool, he has weak peripheral pulses, and his urine output is diminished. These clinical findings are suggestive of which of the following?

Choice A reason: This statement is incorrect, as sodium excess is not likely to cause the symptoms of poor skin turgor, weight loss, irritability, and tachycardia in an infant. Sodium excess, or hypernatremia, is a condition where the blood sodium level is too high, which can result from excessive intake or loss of water. The symptoms of sodium excess may include thirst, dry mouth, confusion, seizures, or coma.

Choice B reason: This statement is incorrect, as overhydration is not likely to cause the symptoms of poor skin turgor, weight loss, irritability, and tachycardia in an infant. Overhydration, or hypervolemia, is a condition where the body has too much fluid, which can result from excessive intake or retention of water. The symptoms of overhydration may include edema, weight gain, shortness of breath, or crackles in the lungs.

Choice C reason: This statement is correct, as dehydration is the most likely cause of the symptoms of poor skin turgor, weight loss, irritability, and tachycardia in an infant. Dehydration is a condition where the body loses more fluid than it takes in, which can result from vomiting, diarrhea, fever, or inadequate intake of water. The symptoms of dehydration may include dry skin, sunken eyes, decreased urine output, or lethargy.

Choice D reason: This statement is incorrect, as calcium excess is not likely to cause the symptoms of poor skin turgor, weight loss, irritability, and tachycardia in an infant. Calcium excess, or hypercalcemia, is a condition where the blood calcium level is too high, which can result from hyperparathyroidism, malignancy, or excessive intake of vitamin D or calcium. The symptoms of calcium excess may include nausea, constipation, muscle weakness, or kidney stones.

Choice A reason: This statement is correct, as suctioning the mouth and nasopharyngeal passages is the most important priority for airway care in an infant who has had a cleft palate repair. The nurse should suction the infant frequently and gently to remove any blood, mucus, or secretions that may obstruct the airway or cause aspiration. The nurse should also monitor the infant's respiratory rate, oxygen saturation, and signs of distress.

Choice B reason: This statement is incorrect, as giving IV morphine for pain is not the most important priority for airway care in an infant who has had a cleft palate repair. Although pain management is essential for the infant's comfort and recovery, it is not the first intervention for airway care. The nurse should assess the infant's pain level and administer the prescribed analgesics as needed, but only after ensuring the airway is clear and patent.

Choice C reason: This statement is incorrect, as cleaning the suture line with normal saline is not the most important priority for airway care in an infant who has had a cleft palate repair. Although wound care is important for the prevention of infection and the promotion of healing, it is not the first intervention for airway care. The nurse should clean the suture line with sterile saline or water as ordered, and avoid using cotton swabs or hydrogen peroxide that may damage the tissue or cause bleeding.

Choice D reason: This statement is incorrect, as elevating the head of the bed 30 degrees is not the most important priority for airway care in an infant who has had a cleft palate repair. Although elevating the head of the bed can help reduce the swelling and improve the drainage, it is not the first intervention for airway care. The nurse should position the infant on the side or abdomen, with the head slightly elevated, and avoid placing the infant on the back or putting pressure on the operative site.