A cistern where the arachnoid extends across between the two temporal lobes , and encloses the cerebral peduncles including the structures contained in the interpeduncular fossa .
MCA stroke - Emergency neuroradiology. Axial CT scan at the level of the basal cisterns shows the "hyperdense middle cerebral artery (MCA) sign" (arrow) representing acute clot within the right middle cerebral artery, accounting for the patient's clinical symptoms
Prophylactic enoxaparin as soon as consultant sees fit
Always keep VTE in the back of your mind
How are SAH graded? World Federation Neurosurgeons Fischer grading GCS 15, only CN deficit if any Grade 1 No blood GCS 13-14, no deficit Grade 2 Diffuse blood, no clots & <1mm GCS 13-14, with deficit Grade 3 Clots & blood 1mm or more GCS 7-12, +/- deficit Grade 4 ICH or intraventricular clots GCS 3-6 +/- deficit Grade 5