Diagnostic accuracy of computed tomography for subarachnoid haemorrhage in patients presenting with thunderclap headache (lumbar puncture as gold standard)

Aim: to determine the diagnostic accuracy of ct (confirmed with lumber puncture analysis) for sah in patients presenting in emergency department with thunderclap headache. study design: cross sectional study place and duration of study: 6 months,radiology department,nishtar hospital multan methods: this was a cross sectional study which included 137 patients with thunder scalp headache. all the patients had ct brain without contrast for evaluation of subarachnoid hemorrhage and subsequently undergone csf analysis (as gold standard). results: the sensitivity,specificity and diagnostic accuracy of ct scan was 85.58%,88.46% and 86.13% respectively conclusion: ct scan brain is a reliable test and should be done in every case of thunder scalp headache.