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Table 2 Characteristics of measurement systems

From: Instruments for monitoring intensive care unit sedation

   Clinical utility  
Measuring system Advantage and limitations (rating points 0-50) Reference
Plasma drug concentration Lack of agreement with level of sedation 5 [10]
Frontalis electromyography Interindividual variation 10 [11]
Lower oesophageal contractility Low sensitivity 10 [12]
Continuous electroencephalography Difficult interpretation 15 [13]
  Interagent variation   
Cerebral function monitor Complex and difficult to interpret 20 [14]
Cerebral function analyzing monitor Complex and difficult to interpret 25 [15]
Power spectral analysis Not available for clinical use 5 [16]
AEPs Limited reliability in light sedation 35 [17]
  Adequate for research