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Increased incidence of postoperative cognitive dysfunction 24 hr after minor surgery in the elderly.
Rohan D, Buggy DJ, Crowley S, Ling FK, Gallagher H, Regan C, Moriarty DC.
Department of Anesthesia, Critical Care and Pain Medicine, Mater Misericordiae Hospital, Eccles Street, Dublin 7, Ireland.
PURPOSE: Postoperative cognitive dysfunction (POCD) is evident in 26% of elderly patients seven days after major non-cardiac surgery. Despite the growing popularity of day surgery, the influence of anesthetic techniques on next day POCD has not been investigated. Therefore, we evaluated the incidence of POCD and changes in serum markers of neuronal damage (S-100ss protein and Neuron-Specific Enolase), 24 hr after single-agent propofol or sevoflurane anesthesia in elderly patients undergoing minor surgery. METHODS: Patients (n = 30, mean age 73, range 65-86 yr) coming for cystoscopy or hysteroscopy, were randomized, in an observer-blind design, to receive either single-agent propofol or sevoflurane anesthesia. Changes in neuropsychological tests (the Stroop test and the modified Word-Recall Test), 24 hr postoperatively were compared with age-matched control subjects (n = 15) using Z-score analysis. Changes in S-100beta protein and Neuron-Specific Enolase levels were also documented. RESULTS: POCD was present in 7/15 [47% (95% confidence interval (CI) 21 to 72%)] patients who received propofol and 7/15 [47% (95% CI 21 to 72%)] patients who received sevoflurane, compared with 1/15 [7% (95% CI 6 to 19%)] control patients, P = 0.03. S-100beta protein and Neuron-Specific Enolase levels were not significantly different in anesthetized patients postoperatively compared with preoperative values. CONCLUSION: The incidence of POCD in elderly patients on the first day after minor surgery is higher than previously reported for seven days after major surgery, and is increased after both propofol and sevoflurane anesthesia, compared with age-matched controls. S-100beta protein and Neuron-Specific Enolase levels were unaffected by anesthetic technique
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[Cognitive dysfunction after abdominal surgery in elderly patients]
[Article in German]
Muller SV, Krause N, Schmidt M, Munte TF, Munte S.
FNW, Institut fur Psychologie II, Otto-von-Guericke-Universitat Magdeburg, Postfach 4120, 39016 Magdeburg, Germany. [
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Elderly patients often suffer from postoperative cognitive deficits (POCD) after serious surgical operations. The reasons for this are not well understood. We investigated the influence of the invasiveness of the operation and the duration of the operation as well as the patient's preoperative physical status on measures of cognitive dysfunction.In a prospective study 59 elderly patients (mean age 69.2 years) were subjected to a neuropsychological test battery and a questionnaire following an abdominal surgical operation. The postoperative recovery with a focus on memory function was assessed using the Wechsler Memory Scale (WMS) seven days after the operation. Self-reported cognitive deficits were studied using the a questionnaire of experienced attention deficits (FEDA) three months after the operation.Postoperative psychological and self-reported test results varied as a function of the invasiveness and the duration of the operation. After more invasive operations patients reported a stronger deficit in activities of daily living and a reduction in drive than after less invasive operations. In addition, the duration of anesthesia influenced the experienced deficits. The self-reported deficits were more strongly influenced by the features of the operation than the psychological test data. The physical status of the patients according to the American Society of Anesthesiologists (ASA) along with the duration of anesthesia as covariate was identified as a good predictor for the cognitive recovery post operation.
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