Cerebral aneurysms are vascular malformations of the cerebral vessels present in a small but not negligible percentage of the population. Many symptoms may be manifested and most of them, fortunately, will never ruffle, but their breakthrough is what everyone is fearful of, as consequently subarachnoid haemorrhage often has fatal consequences or severe disability. Cause of aneurysm rupture can be a psychophysical effort, but occurs they are at rest. Of the potential complications that most often determine the ultimate outcome of the disease are rupture, vasospasm and hydrocephalus. Such aneurysms are usually discovered accidentally when testing for some other illnesses. Neurosurgical treatment has been the only form of treatment for decades, but in recent years, an endovascular approach to treatment of aneurysms has developed. The nurse as a member of the team carries out and plans health care procedures. Thoroughly taken sister's history gives a better insight into the patient's condition and facilitates further planning of health care. Interventions in the care of patients with brain aneurysm are numerous and require the knowledge and skills of nurses who are trained in work in the intensive care unit.