CPN Exam Study Guide | Questions with 100% Correct Answers | Verified | Latest Update 2024 | 34 Pages

A 6-week-old male infant is brought into the ED by his mother. He has a weeklong history of progressively worsening emesis that is projectile in nature. What is his most likely diagnosis? A. Intussusception. B. Appendicitis. C. Pyloric stenosis. D. Pancreatitis. - C: Projectile vomiting in a 6 week-old male is the classic presentation for pyloric stenosis, obstruction of the pyloric sphincter between the gastric pylorus and the small intestine, caused by hypertrophy and hyperplasia of the circular muscle of the pylorus, which obstructs the sphincter. An 8-year-old male has contracted chicken pox (varicella virus). With which of the following family members can the child have contact? A. 20-year-old aunt on chemotherapy. B. 35-year-old uncle with HIV. C. 95-year-old grandfather on long-term steroid therapy. D. 2-year-old brother who has never had varicella but has had the vaccine - D: The 2-year-old brother, who has had the vaccine, is likely immune to varicella, so contact is safe. All of the other relatives have some form of immunosuppression from infection (HIV) or medications (chemotherapy and steroids) and should avoid contact with the patient A 5-year-old girl has a fever, headache, and complaints of a stiff neck. The physician suspects bacterial meningitis. What is the best test culture site to detect the bacteria? A. Lumbar puncture. B. Clean catch urine. C. Blood culture.