Comparison between Bispectral Index and Patient State Index ... | 合法醫療器材資訊網

Therefore,therecommendedintraoperativerangeforBIS(60–40)andPSI...mostrecentversions(BISVistaandHospiraSEDline)ofbothdepth-of-​anesthesia ...

DEPTH of anesthesia is commonly estimated based on indirect signs such as heart rate, blood pressure, or movement in response to noxious stimuli. However, these parameters have been shown to be unreliable in assessing depth of anesthesia and preventing intraoperative awareness.1,2[1]The electroencephalogram is affected in a characteristic manner by both volatile and intravenous anesthetics and may therefore be analyzed with respect to depth of anesthesia. Meanwhile, half a dozen different depth-of-anesthesia monitors that are based on the electroencephalogram and express depth of anesthesia as a numerical index are commercially available.3 

In this study, we compared two such indices, the Bispectral Index (BIS) and the Patient State Index (PSI), to assess the depth of sevoflurane anesthesia. Both indices range between 100 (awake state) and 0 (deep anesthesia) but differ in their recommended range...