Aneurysmal Subarachnoid Hemorrhage Grading in Animal Models - Animal Models of Acute Neurological Injuries: Injury and Mechanistic Assessments - page 307

Fig. 1. Demonstrating the type of digital photo of the brain required for SAH grading.
Basilar artery (BA), anterior cerebral artery (ACA), internal carotid artery (ICA), proximal
posterior cerebral artery (pPCA), posterior communicating artery (PcomA), middle cerebral
artery (MCA), distal posterior cerebral artery (dPCA), superior cerebellar artery (SCA).
Photo adopted with modifi cation from Sugawara et al. ( 11 ) .
2. In the photographs, the basal cisterns are divided into six
segments as shown in (Figs. 1 - 3 ).
3. Each segment was allotted a grade from 0 to 3 depending on
the amount of subarachnoid blood clot in the segment (Figs. 2
and 3 ):
(a) Grade 0: no subarachnoid blood (Fig. 2a , b).
(b) Grade 1: minimal subarachnoid blood (Fig. 3 ).
(c) Grade 2: moderate blood clot with recognizable arteries
(Fig. 2c ).
(d) Grade 3: blood clot obliterating all arteries within the seg-
ment (Fig. 2d ).