The ventricular cast refers to cerebral hemorrhage, where blood breaks into the ventricles or the primary ventricular hemorrhage causes the accumulation of blood in the ventricles, which can affect the cerebrospinal fluid circulation and cause obstruction of the cerebrospinal fluid circulation pathway, resulting in obstructive hydrocephalus, a rapid increase in cranial pressure, and the formation of brain herniation, which can endanger the patient’s life. The destruction of brain tissue in the deep part of the brain can lead to deep coma, and the symptoms of high cranial pressure can seriously endanger the patient’s life and health. If the obstructed blood is drained from the ventricles after aggressive treatment, the patient’s prognosis may also be obstructive hydrocephalus, which can lead to reduced ability to live or heavy sequelae.