closed vs open drainage model in EVD management
- related: Neurology
- tags: #literature #neuro
In fact, there has been no randomized clinical trial to compare the two most common paradigms of EVD management: closed-drain vs open-drain management. In the closed-drain model, the catheter stopcock is closed to the outside drainage bag (this allows sensing intracerebral pressure in the closed system). When the pressure increases (or at a prespecified interval), fluid is drained from the EVD. In the open-drain model, the outlet of the EVD is set at a specific height above the tragus of the ear, and fluid is drained when the pressure in the cerebral ventricles exceeds the back pressure derived from gravity from the elevation of the catheter outlet.1