Subarachnoid haemorrhage with hyperattenuating blood around the circle of Willis, interhemispheric fissure, and sylvian fissures.
Visible temporal horns suggesting obstructive hydrocephalus and/or loss of grey-white differentiation suggesting raised intracranial pressure.
b. Severe disease features
Stupor, deep coma, vegetative state, or markedly reduced GCS.
Hemiparesis or other motor deficit.
Decorticate or decerebrate posturing.
Cushing response or other signs of raised intracranial pressure.
c. Management with detail
Management step
Detail
Analgesia
Titrate IV opioid analgesia to pain and sedation level.
Blood pressure control
Use titrated IV antihypertensive therapy with a systolic target agreed with neurosurgery, commonly 140-160 mmHg.
Prevent secondary injury and arrange definitive care
Head elevation, avoid hypoxia/hyperthermia/abnormal glucose, consider hyperosmolar or anticonvulsant therapy, and arrange urgent neurosurgical retrieval.
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