If you missed the recent programmes about a team of UK doctors who went to the top of Everest to investigate how people cope with extremely low levels of oxygen in the blood then click on the link below.  Many of the doctors are consultants in intensive care where their patients die from low oxygen.  The link below will take you to the BBC web site and a set of videos.  The videos have some fantastic shots of the ascent including the final stages over the Hillary Step.

http://www.bbc.co.uk/sn/tvradio/programmes/horizon/broadband/tx/everest/journey/index.shtml

They hope that the invasive tests they carried out on themselves will help develop methods of saving patients on intensive care.