Anaesthesiology Department, Hospital Geral de Santo António - Centro Hospitalar do Porto, Porto, Portugal.
Curr Opin Anaesthesiol. 2011 Dec;24(6):657-64. doi: 10.1097/ACO.0b013e32834c7aba.
We critically review brain function monitors based on the processed electroencephalogram with regards to signal quality, artefacts and other limitations in clinical performance.
Several studies have been showing that depth of anaesthesia monitors based on processed electroencephalogram has limitations that can lead to a wrong interpretation of the level of anaesthesia. Processed electroencephalogram indices can be altered by nonanaesthetic influences ranging from artefacts that affect signal quality and signal processing, adverse effects of some anaesthetic and nonanaesthetic drugs, neuromuscular blocking agents to conditions inherent to the patient such as cerebral tumours, brain ischemia and temperature.
Clinicians should be aware of the several limitations of the commercial devices intending to monitor the depth of anaesthesia, which may not reflect the real underlying level of unconsciousness.
我们批判性地回顾了基于处理后脑电图的脑功能监测仪，涉及信号质量、伪影和其他临床性能限制。
多项研究表明，基于处理后脑电图的麻醉深度监测仪存在局限性，可能导致对麻醉水平的错误解读。处理后脑电图指数可能受到非麻醉影响的改变，包括影响信号质量和信号处理的伪影、某些麻醉和非麻醉药物、神经肌肉阻滞剂的不良反应，以及患者固有的情况，如脑肿瘤、脑缺血和体温。
临床医生应该意识到旨在监测麻醉深度的商业设备存在多种局限性，这些设备可能无法反映无意识的真实潜在水平。
