Review Question - QID 109169

A 27-year-old G1P1001 woman is recovering in the postpartum unit 3 days after a Caesarean section for breech presentation of the infant. She was at 40 weeks and 2 days gestation at the time of delivery. The patient is now experiencing purulent discharge and continued heavy bleeding. She also notes difficulty and discomfort with urination. The patient’s prenatal course was complicated by one episode of pyelonephritis, which was treated with intravenous ceftriaxone and suppressive nitrofurantoin for the remainder of the pregnancy. The patient has a medical history of generalized anxiety disorder and atopic dermatitis. On postpartum day 3, her temperature is 101.2°F (38.4°C), pulse is 112/min, blood pressure is 118/71 mmHg, and respirations are 13/min. A physical exam reveals that she is uncomfortable and diaphoretic. Her lochia is purulent with several blood clots and her uterus is slightly boggy and soft. There is mild tenderness with uterine manipulation. Which of the following is the most appropriate next step in management for this patient's condition?