Where are external ventricular drains typically inserted to monitor ICP?

External ventricular drains (EVDs) are typically inserted into the lateral ventricle of the brain. This placement is strategic for effectively monitoring intracranial pressure (ICP) and allows for drainage of cerebrospinal fluid (CSF) when necessary. The lateral ventricle is one of the largest ventricles in the brain, making it accessible for insertion and ensuring that the monitoring reflects the overall pressure dynamics within the ventricular system.

By utilizing the lateral ventricle, clinicians can accurately measure ICP and manage conditions such as hydrocephalus or traumatic brain injury. This method facilitates both therapeutic drainage and pressure monitoring, which are critical aspects of managing patients with elevated ICP.

In contrast, other areas such as the subarachnoid space, epidural space, or right ventricle do not provide the same efficacy for ICP monitoring or drainage purposes. These alternatives either do not allow for direct access and measurement of ventricular pressures or might introduce risks and complications associated with the insertion and maintenance of the device.