Correct Answer: B

Rationale: The correct answer is B: Jitteriness of the hands. Jitteriness is a key sign of cold stress in a newborn, indicating the need for immediate warming measures. A respiratory rate of 60/min may not be directly indicative of cold stress. Diaphoresis (excessive sweating) and bounding peripheral pulses are not typical findings associated with cold stress in newborns.

Correct Answer: A

Rationale: A paradoxical pulse is a sign of cardiac tamponade, a life-threatening complication of pericarditis that requires immediate intervention. It results from decreased cardiac output due to increased pressure in the pericardial sac. Reporting this finding promptly allows for timely treatment to prevent further deterioration. Dependent edema and substernal chest pain are common in pericarditis but are not as urgent as a paradoxical pulse. A pericardial friction rub is a classic finding in pericarditis and indicates inflammation but is not as critical as a paradoxical pulse.

Correct Answer: C

Rationale: The correct instruction for a patient starting radiation therapy for esophageal cancer is to wear clothing over the area of radiation treatment. This helps to prevent irritation and protect the skin. Removing dye markings after each treatment (choice A) is unnecessary and not typically part of the patient's self-care. Applying a warm compress (choice B) can exacerbate skin irritation caused by radiation. Using a washcloth to bathe the treatment area (choice D) can potentially irritate the skin further, making it important to avoid.

Correct Answer: B

Rationale: The correct answer is B. A urine output of 20 mL/hour is a sign of magnesium toxicity because decreased urine output can lead to accumulation of magnesium. Choices A, C, and D are not indicators of magnesium toxicity. Elevated blood glucose, high systolic blood pressure, and normal BUN levels do not specifically point towards magnesium toxicity.

Correct Answer: C

Rationale: A boggy uterus located 2 cm above the umbilicus suggests uterine atony, which is a common cause of postpartum hemorrhage. The initial intervention in this situation is to massage the fundus. Fundal massage helps the uterus contract, promoting hemostasis and preventing excessive bleeding. Taking vital signs or assessing lochia are important actions but are secondary to addressing uterine atony. Administering oxytocin IV bolus is often done after fundal massage to further enhance uterine contractions.