Articles: general-anesthesia.
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Infusionsther Transfusionsmed · Oct 1993
[Monitoring intraoperative processing of acoustic stimuli with auditory evoked potentials].
130 Patients undergoing elective intra-abdominal, gynaecological, urological or cardiac surgery were studied after institutional approval and informed consent. In all patients auditory-evoked potentials (AEP) were recorded in the awake state and during general anaesthesia. Latencies of the peaks V, Na, Pa, Nb and P1 were measured. ⋯ During anaesthesia with receptor-specific anaesthetics, the brainstem peak V as well as the mid-latency components remain nearly unchanged compared with AEP from awake patients. This indicates that auditory stimuli reach the primary auditory cortex and are processed at a primary cortical level. With increasing doses of fentanyl one can observe only a significant decrease of amplitudes for the late component P1.(ABSTRACT TRUNCATED AT 250 WORDS)
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We wished to identify patients able to recall intraoperative events after general anaesthesia involving cardiopulmonary bypass (CPB). A balanced anaesthetic technique consisting of benzodiazepines, low dose fentanyl (15.9 +/- 8.5 micrograms.kg-1) and a volatile agent was employed. Perioperative recall was sought utilizing a structured interview on the fourth or fifth postoperative day. ⋯ The incidence of recall in patients undergoing cardiac surgery was less in our group than previously reported. It is, however, higher than the 0.2% incidence recently reported in patients undergoing non-cardiac surgery. This is probably due to patient characteristics and intraoperative factors which make it difficult to avoid periods of relatively light anaesthesia during cardiac surgery.
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Tijdschr Gerontol Geriatr · Oct 1993
Review[The role of general or regional anesthesia in the etiology of cognitive disorders in elderly subjects. Literature review].
In the eighties and nineties, eighteen papers were published concerning the influence of general or regional anaesthesia on mental function of elderly patients. In both groups mental changes can be found in the immediate post-operative period, but not on the long term. Analysis of these studies shows a relation between postoperative mental changes and, for example, high doses of drugs, a low preoperative level of mental performance or other factors, associated with personality and environment of the patient.