A -year-old woman is brought to the emergency department by her family due to a -hour history of severe generalized headache, high fever, and progressive confusion. Her temperature is (), blood pressure is , pulse is , and respirations are . On physical examination, the patient is lethargic and oriented only to her name. She exhibits nuchal rigidity. There are no focal neurologic deficits, and funduscopic examination reveals no papilledema. Which of the following represents the most appropriate sequence of steps in the management of this patient?
- 1Obtain two sets of blood cultures
- 2Administer empiric intravenous antibiotics and dexamethasone
- 3Perform a noncontrast CT scan of the head
- 4Perform a lumbar puncture
Answer
The correct sequence of management is: First, obtain blood cultures; second, administer empiric intravenous antibiotics and dexamethasone; third, perform a noncontrast CT scan of the head; and finally, perform a lumbar puncture.
The standard of care for suspected bacterial meningitis is typically to obtain blood cultures, perform a lumbar puncture, and then start antibiotics. However, this patient has distinct indications for a CT scan of the head prior to a lumbar puncture (specifically, age greater than 60 and altered mental status). In this scenario, blood cultures must be drawn immediately to preserve the ability to identify the pathogen. Immediately afterward, empiric antibiotics (e.g., ceftriaxone, vancomycin, ampicillin) and dexamethasone must be administered. Antibiotics should never be delayed for the CT scan or lumbar puncture, as delays drastically increase mortality. Once medical therapy is initiated, the CT scan is performed to rule out any mass effect, followed finally by the lumbar puncture if the imaging is clear.
Step-by-Step Solution
Key Concept
Management sequence for suspected bacterial meningitis with indications for head imaging