He kissed me… but only in my dreams
The risk of waking from a general anaesthetic while under the surgeon’s knife is extremely small - about one in 15,000 - research reveals.
Out of nearly 3 million operations in 2011 there were 153 reported cases. […] A third - 46 in total - were conscious throughout the operation.
The incidence of accidental awareness during general anaesthesia (AAGA) is reported by several studies to be surprisingly high, in the range of 1–2 per 1000 general anaesthetics administered. These studies employ a direct patient questionnaire (usually repeated three times over a period of up to 30 days postoperatively) known as the ‘Brice protocol.’ It is also reported that a high proportion of patients experiencing AAGA suffer psychological problems including posttraumatic stress disorder. There are in fact very few studies reporting an incidence of AAGA much lower than this, an exception being that of Pollard et al., who found an incidence of 1:14 500. However, their methods might be criticised as they administered the questionnaire only twice over a 48-h period, which might only detect two thirds of cases . Anecdotally, anaesthetists do not perceive the incidence of AAGA to be so high. A small Japanese study found that only 21 of 172 practitioners had known of an incident of AAGA under their care, with an overall incidence of just 1:3500. In a larger UK survey of over 2000 consultants, Lau et al. reported that anaesthetists estimated the incidence to be approximately 1:5000, similar to the estimated incidence reported previously by 220 Australian anaesthetists of between 1:5000 and 1:10 000.
