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Somatosensory evoked potentials versus locoregional anaesthesia in the monitoring of cerebral function during carotid artery surgery: preliminary results of a prospective study.
- Source :
-
European journal of vascular and endovascular surgery : the official journal of the European Society for Vascular Surgery [Eur J Vasc Endovasc Surg] 2001 May; Vol. 21 (5), pp. 413-6. - Publication Year :
- 2001
-
Abstract
- Objective: to relate changes in somatosensory-evoked potentials (SEPs) with onset of neurological deficits in patients having carotid endarterectomy (CEA) under locoregional anaesthesia.<br />Methods: a prospective study of 50 consecutive patients.<br />Results: SEPs yielded an accuracy of 98%, specificity 100%, and sensitivity 89%. In all concordant cases the onset of a neurological deficit in awake patients corresponded to a 30--40% reduction in amplitude of N20-P25 waveforms. After shunting, the N20-P25 took 2--3 min to return to normal.<br />Conclusions: SEPs are associated with a 2% false negative rate. Their threshold for detecting cerebral ischaemia is lower than the currently reported value for patients under general anaesthesia. The time needed for evoked potentials (2--3 min) to return to normal after shunting limits their usefulness in verifying effective shunting.<br /> (Copyright 2001 Harcourt Publishers Limited.)
Details
- Language :
- English
- ISSN :
- 1078-5884
- Volume :
- 21
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- European journal of vascular and endovascular surgery : the official journal of the European Society for Vascular Surgery
- Publication Type :
- Academic Journal
- Accession number :
- 11352515
- Full Text :
- https://doi.org/10.1053/ejvs.2001.1342