[Spontaneous subarachnoid hemorrhage. Plea for a standard evaluation system].

There is no univocal grading of subarachnoid hemorrhage by ruptured intra-cranial aneurysms. Three systems are commonly used: Botterell's, Hunt's and Hess's, Nischioka's. Besides, many surgical teams use modified or derived systems. It is this very difficult to compare series of patients whose grading has not been made, using the same criteria. The authors propose to make a unique system of grading with new criteria of clinical evaluation.