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Report by Ayan Sen, Clinical Fellow, Intensive Care/Emergency Medicine
Search checked by Shweta Gidwani and Craig Ferguson, Clinical Effectiveness Fellows
Institution: Manchester Royal Infirmary, Manchester, UK
Three-part question
In [patients with clinical suspicion of subarachnoid haemorrhage] is [CT Angiography better than non-contrast CT and lumbar puncture] in [detection]?
Clinical scenario
A 41-year-old man comes to the Emergency Department complaining of a sudden onset of excruciating headache with photophobia and episodes of vomiting.He is afebrile and has a blood pressure of 180/110 mm Hg. You are worried he may have a subarachnoid haemorrhage (SAH) and arrange an urgent computed tomography (CT) scan.The radiologist kindly agrees to it and reports no haemorrhage seen on …