CT for Subarachnoid Hemorrhage

Subarachnoid Haemorrhage

A negative head CT in a neurologically normal patient, with a thunderclap headache presentation, a clear time of onset, and a modern CT scanner performed within 6 hours of onset read by an attending radiologist results in a post test risk of SAH of 1 – 2/1000 patients. A shared decision strategy should be used to balance the risk and benefits of performing a lumbar puncture versus a negative CT within 6 hours being sufficient to rule out SAH.


Emergency Medicine Kenya Foundation (EMKF) is an NGO supporting emergency healthcare providers across Kenya to save lives by strengthening the emergency healthcare system through capacity building, knowledge development, advocacy and research.