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Unusual case of low bispectral index values due to electrocardiographic interferences
Montreal, Canada
* E-mail: thomashemmerling@hotmail.com
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Editor—The bispectral index (BIS, Aspect Medical Systems, Newton, MA, USA) is widely used as an accurate measure of the hypnotic effect of anaesthetics and sedative drugs.1 Values between 40 and 60 are recommended for maintenance of general anaesthesia.2 We report a case where BIS values were constantly below expected levels, probably caused by interference with ECG monitoring.
A 59-yr-old man (weight=95 kg, ASA I) underwent laparoscopic partial gastrectomy. Anaesthesia