Article Text

Download PDFPDF
EMQ answers 394

Statistics from

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.


  1. True. The frequency of sentinel headaches preceding confirmed subarachnoid haemorrhage ranges widely in studies from 10–43%.1 This variability is only partly explained by recall bias. A recent review recommends that the term sentinel bleed should be abandoned: “people have either had a subarachnoid haemorrhage or not and the important task is to recognise when they have.”2

  2. False. The false negative rate is approximately 2% when performed within 12 h, increasing to 7% by 24 h. Subarachnoid blood is almost completely reabsorbed at 10 days.2

  3. False. There is currently no sound …

View Full Text

Linked Articles

  • Emergency Medicine Questions (EMQ)
    BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine