A -year-old man is brought to the emergency department by his wife due to severe headache, high fever, and confusion that started hours ago. On examination, his temperature is (), blood pressure is , and heart rate is . The patient is lethargic and oriented only to his name. Nuchal rigidity is present. There are no focal neurologic deficits. The physician suspects acute bacterial meningitis.
Arrange the following steps in the most appropriate chronological order for the management of this patient.
- 1Obtain blood cultures
- 2Administer empiric intravenous antibiotics and dexamethasone
- 3Perform a noncontrast CT scan of the head
- 4Perform a lumbar puncture
Answer
The correct sequence is: Obtain blood cultures, followed by administration of empiric intravenous antibiotics and dexamethasone, then perform a noncontrast CT scan of the head, and finally perform a lumbar puncture.
The standard of care for suspected bacterial meningitis with indications for imaging (such as altered mental status, focal neurologic deficits, immunocompromised state, or history of CNS disease) dictates that blood cultures be drawn first. This is immediately followed by empiric antibiotics and dexamethasone to prevent delay in life-saving treatment. Once therapy is initiated, the patient can safely undergo a noncontrast head CT to rule out mass effect, after which a lumbar puncture can be safely performed to analyze the cerebrospinal fluid.
Step-by-Step Solution
Key Concept
In patients with suspected bacterial meningitis who have indications for a CT scan before lumbar puncture (e.g., altered mental status, focal neurological deficits, immunocompromise), blood cultures should be drawn first, followed immediately by empiric antibiotics and dexamethasone, before sending the patient for neuroimaging.