In this procedure, the provider inserts a needle into one of the brain’s ventricles to inject a diagnostic or therapeutic agent. The provider accesses the brain through the patient’s skull through a previously created burr hole, the fontanelle or a coronal suture, or through an internal ventricular drain. This service is done to measure pressure, remove excess fluid, and or collect fluid samples to diagnose or treat neurological conditions such as an infection, known as meningitis.
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