We report a case of a ruptured aneurysm in a patient in her 90's who was treated by coil embolization and returned to her independent life after discharge. A 95-year-old woman with a diagnosis of subarachnoid hemorrhage (SAH) of Hunt & Kosnik Grade II was treated by coil embolization, ventricular drainage, and a ventriculo-peritoneal shunt. The ventricular drainage was assembled as a closed system using a newly developed one-way ball valve to regulate the cerebrospinal fluid (CSF) outflow. With this system the patient was able to assume any posture and perform any movement she wished. The patient was freed from the physical constraint involved in conventional ventricular drainage. Early rehabilitation during the ventricular drainage would be useful to prevent pneumonia and muscle atrophy.