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A 70-year-old man presented to his physician with a broken a…

A 70-year-old man presented to his physician with a broken arm. Laboratory work indicated an elevated prothrombin time (PT), which would indicate that his blood is not clotting properly. The man was also taking an antibiotic for an earlier respiratory infection. Which of the following vitamins might be involved?

A 21-year-old college student presents to the student health…

A 21-year-old college student presents to the student health clinic for a full physical examination. He is generally healthy; however, he reports that he has had sexual intercourse with multiple partners in the past couple of months. He noticed a small lesion on the shaft of his penis a few days ago. While performing the examination, he unwillingly achieves an erection. How should the clinician proceed at this point?

A 26-year-old female presents to the Emergency Department wi…

A 26-year-old female presents to the Emergency Department with intense abdominal pain for 6 hours, light-headedness, and a fainting episode that finally prompted her to seek medical attention. She has a history of gallstones and is concerned that she is having another gallbladder attack. She denies nausea and vomiting, and her last normal bowel movement was this morning. She reports that her LMP was 10 weeks ago. Vital signs: pulse 118; blood pressure, 86/68; respiratory rate, 20/min; oxygen saturation, 99%; and temperature, 37.3ºC orally. A β-human chorionic gonadotropin (β-hCG) blood test is pending. The NP performs an abdominal exam before her pelvic exam and, on palpation of her abdomen, finds involuntary rigidity and rebound tenderness. Which of the following is the most likely etiology for these assessment findings?