ATI RN
Musculoskeletal Pediatrics Questions
Question 1 of 5
Myasthenia gravis is a chronic autoimmune disease of neuromuscular blockade. Of the following, the MOST characteristic feature is
Correct Answer: A
Rationale: Fatigue, particularly worsening with activity and improving with rest, is the most characteristic feature of myasthenia gravis.
Question 2 of 5
Maintenance fluids are composed of a solution of water, glucose, sodium, potassium, and chloride. How much of the normal caloric needs of the patient is provided by glucose in maintenance fluids?
Correct Answer: D
Rationale: Standard maintenance fluids (e.g., 5% dextrose) provide about 20% of caloric needs via glucose, a common medical practice.
Question 3 of 5
Hypokalemia is common in children, with most cases related to
Correct Answer: A
Rationale: Gastroenteritis is the most common cause of hypokalemia in children due to potassium loss in diarrhea.
Question 4 of 5
Most erythema multiforme (EM) cases in children are precipitated by herpes simplex virus infection, though the infection may no longer be apparent by the time EM develops. Mycoplasma pneumoniae and other infectious organisms may also trigger EM.
Correct Answer: A
Rationale: Erythema multiforme is an acute, immune-mediated condition often triggered by herpes simplex virus in children, though Mycoplasma pneumoniae is another common cause.
Question 5 of 5
In developmental dysplasia of the hip (DDH), the hip may develop muscular contractures, preventing positive Ortolani tests after the age of
Correct Answer: C
Rationale: After 6 months, contractures in DDH can prevent the Ortolani maneuver from detecting hip dislocation.