Should persistent postoperative nausea and vomiting delay discharge of an ambulatory surgery patient from the post-anesthesia care unit?

A 43-year-old woman with a past medical history of menorrhagia and uterine fibroids just underwent a laparoscopic myomectomy this morning under general anesthesia. Her anesthesia care included desflurane, nitrous oxide, and intermittent boluses of fentanyl and rocuronium. She received dexamethasone before surgical incision and ondansetron 20 min prior to emergence. She woke up comfortable and without complaints. Thirty minutes into her recovery in the post-anesthesia care unit (PACU), she began to experience nausea and had 2 episodes of non-bloody, non-bilious emesis. More ondansetron was given and the patient reported slight improvement of her symptoms, but the nausea returned shortly thereafter.