A 24-year-old woman who is morbidly obese undergoes a surgical procedure under anesthesia. During the procedure, she is given nitrous oxide. It turns out that after the procedure is completed, the patient learns that she was 10 weeks pregnant while she has that procedure. Which of the following potential risks is possible in the fetus?

A 24-year-old woman who is morbidly obese undergoes a surgical procedure under anesthesia. During the procedure, she is given nitrous oxide. It turns out that after the procedure is completed, the patient learns that she was 10 weeks pregnant while she has that procedure. Which of the following potential risks is possible in the fetus?

Five patients undergo surgery for various reasons. Each patient has a particular prior medical history. Which of the following patients would be most problematic to the anesthesiologist if thiopental is used during the surgery?

A 25-year-old man with multiple sexual partners begins to have flulike symptoms. He visits his primary care physician who recommends an HIV screening test based on his history. He is found to have an HIV infection and begins a drug regimen. Which of the following works by blocking the cleavage of the HIV polyproteins?

A 58-year-old woman with end-stage cervical cancer has undergone surgery, chemotherapy, and radiation therapy. She has chronic pelvic pain and is being treated with a fentanyl patch. Because of continued intractable pain, she places three patches on at the same time. She is found dead 6 h later by her caretaker. What is the most likely explanation for her death?

A 27-year-old man presents to the urgent care clinic with multiple painful ulcers on the shaft of his penis. Some strains of the causative virus are resistant because of a mutated thymidine kinase enzyme. Which of the following antivirals may be less effective in treating this man's infection if his strain of virus has a mutated thymidine kinase?