Objective To investigate the feasibility and safety of external ventricular drainage(EVD) followed by early lumbar drainage(LD) under intracranial pressure(ICP) monitoring for the treatment of posthemorrhagic hydrocephalus. Methods This prospective study included 67 patients with spontaneous intracerebral hemorrhage and severe intraventricular hemorrhage who were randomly divided into two groups. All the patients with acute obstructive posthemorrhagic hydrocephalus received an EVD with ICP monitoring and ur...