British Journal of Anaesthesia, Vol 75, Issue 4 481-482, Copyright © 1995 by The Board of Management and Trustees of the British Journal of Anaesthesia
A. Ni Chonchubhair, R. Valacio, J. Kelly and S. O'Keefe
We investigated the validity of the abbreviated mental test (AMT) as a
guide to the diagnosis of delirium in 100 patients aged more than 65 yr.
Patients were assessed using the AMT on the day before and on the third day
after operation. Fifteen patients were delirious on the third postoperative
day; 10 of 43 patients undergoing orthopaedic surgery and five of 57
patients undergoing non-orthopaedic surgery. Delirium developed in four of
16 patients with a preoperative AMT score less than 8 and in 11 of 84
patients with a preoperative AMT score of 8 or more. Patients who developed
delirium had a greater decline in AMT score (mean 2.7 (SD 0.9)) than
patients who did not develop delirium (0.7 (1.0)) (P < 0.001). The
sensitivity and specificity of a decline in AMT score of 2 or more points
after surgery for diagnosis of postoperative delirium were 93% and 84%,
respectively.
SHORT COMMUNICATIONS
Use of the abbreviated mental test to detect postoperative delirium in elderly people
Department of Anaesthesia, Whiston Hospital, Warrington Road, Prescot; Department of Geriatric Medicine, Royal Liverpool University Hospital, Liverpool L69 3BX; Department of Surgery, Royal Liverpool University Hospital, Liverpool L69 3BX
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