A mother brings her 4-month-old son to the clinic with a quarter taped over his umbilicus, and tells the nurse the quarter is supposed to fix her child's hernia. Which explanation should the nurse provide?

Choice A reason: This is the correct answer because moderate amount of foul-smelling lochia is a sign of endometritis, which is an infection of the uterine lining that can occur after delivery. Endometritis can cause fever, pelvic pain, and uterine tenderness.

Choice B reason: Blood pressure of 122/74 mm Hg is within the normal range for a postpartum client and does not indicate an infection. However, the nurse should monitor for signs of preeclampsia or eclampsia, such as hypertension, proteinuria, headache, blurred vision, and seizures.

Choice C reason: Oral temperature of 100.2°F (37.9°C) is slightly elevated, but not necessarily indicative of an infection. A mild fever may occur within the first 24 hours after delivery due to dehydration or hormonal changes. However, if the fever persists or increases, the nurse should suspect an infection and notify the healthcare provider.

Choice D reason: White blood cell count of 19,000/mm^3 (19 x 10^9/L) is higher than the normal range, but not necessarily indicative of an infection. A leukocytosis or increased WBC count may occur as a normal response to stress or trauma during delivery. However, if the WBC count remains elevated or increases further, the nurse should suspect an infection and notify the healthcare provider.

Choice C reason: providing supplemental oxygen is the first action that the nurse should take for a client who has a suspected pulmonary embolus. A pulmonary embolus is a life-threatening condition that occurs when a blood clot travels to the lungs and blocks the blood flow, causing hypoxia and respiratory distress. The nurse should administer oxygen to improve the client's oxygenation and prevent further complications.

Choice A reason: notifying the healthcare provider is not the first action that the nurse should take for a client who has a suspected pulmonary embolus. The nurse should notify the healthcare provider after providing supplemental oxygen and assessing the client's vital signs and symptoms.

Choice B reason: preparing a continuous heparin infusion per protocol is not the first action that the nurse should take for a client who has a suspected pulmonary embolus. Heparin is an anticoagulant that can prevent further clot formation and reduce the risk of recurrence, but it does not dissolve existing clots or improve oxygenation. The nurse should prepare a heparin infusion after obtaining a prescription from the healthcare provider and confirming the diagnosis with diagnostic tests.

Choice D reason: bringing the emergency crash cart to the bedside is not the first action that the nurse should take for a client who has a suspected pulmonary embolus. The emergency crash cart contains equipment and medications that can be used in case of cardiac arrest or other emergencies, but it does not address the immediate need of oxygenation. The nurse should bring the emergency crash cart to the bedside after providing supplemental oxygen and assessing the client's condition.