Date	Event	Description
3 May 2009	New search has been performed	The searches have been updated and completed to November 2008. In the years since the searches were last completed in 2000, we have identified one new randomised trial (Palombo 2007), which assesses the effect of shunting versus non‐shunting during carotid endarterectomy. This new trial involved 48 patients in each group and there were no outcome events in either group. In this updated version, the conclusions have not therefore changed materially from the previous review.
3 May 2009	New citation required but conclusions have not changed	Change of authorship.
12 September 2008	Amended	Converted to new review format.
10 August 2001	New search has been performed	In the six years since this review was first published there have been a number of retrospective comparisons of selective shunt use versus systematic shunt use, as well as a prospective comparison of different shunt types, but there have been no new prospective randomised controlled trials relevant to this review.