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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