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British Journal of Anaesthesia, 1991, Vol. 66, No. 3 345-352
© 1991 The Board of Management and Trustees of the British Journal of Anaesthesia

research-article

PSYCHOMOTOR RECOVERY AFTER OUTPATIENT ANAESTHESIA: INDIVIDUAL IMPAIRMENT MAY BE MASKED BY GROUP ANALYSIS

S. HICKEY, F.C.ANAES., A. J. ASBURY, F.C.ANAES., PH.D. and K. MILLAR, PH.D., C.PSYCHOL., F.B.PS.S.

Clinical Shock Study Group, Department of Anaesthesia Western Infirmary, Dumbarton Road, Glasgow G11 6NT
University Department of Anaesthesia Western Infirmary, Dumbarton Road, Glasgow Gil 6NT
Behavioural Sciences Group, University of Glasgow 4 Lilybank Gardens, Glasgow G12 8QQ

Correspondence to A.J.A.

Recovery from outpatient anaesthesia with propofol was followed in 10 patients, using a semantic recognition memory test (SemRT) (in a new implementation on a Psion hand-held microcomputer), choice reaction time (CRT) and critical flicker fusion threshold (CFFT). Group analysis of results revealed an effect on psycho-motor performance as measured by the SemRT and CFFT (but not the CRT), 30 min after the end of the procedure. Performance on all three tasks had returned to baseline values within 60 min of completing the anaesthetic. Group analysis, however, masks individual impairment which may be clinically important. There was no statistically significant correlation between post-anaesthetic task performance and age, sex, dose of propofol, anxiety or depression score.


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