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Hopefully we can now stop doing LP ’ s to rule out SAH if CT scan performed within 6 hours of onset
The Canadian study by Perry et al just published in the BMJ studied 3132 patients with worst ever headache across 11 ED’s between 2000-2009 of which 240 (7.7%) had subarachnoid haemorrhage. CT scanning overall had a sensitivity of 93% for detecting SAH, but if done within 6 hours of onset of headache and interpreted by an experienced radiologist, the sensitivity rose to 100% picking up ALL 121 patients with SAH of the 953 patients scanned within 6 hours. Looks like its time to modify our practices as long as we have access to experienced radiologists – overnight may be an issue when such access may not be readi...
Source: Oz E Medicine - emergency medicine in Australia - July 19, 2011 Category: Emergency Medicine Authors: admin Tags: tips and guidelines headache subarachnoid haemorrhage Source Type: blogs