DAY 12 (EEG)

Question 1

EMG

Answer 1

is a value of muscle electricity expressed as a %, long before you can make conscious movements it returns, no muscle electricity then you are sedated.

Question 2

PSI

Answer 2

Patient State Index, numerical value of state of anesthesia, 100 being fully awake 0 being completely supressed.

Question 3

SR

Answer 3

SR (suppression ratio) is the % of time suppressed to activity. A bigger number means more time suppressed

Question 4

ARTF

Answer 4

ARTF (artifact) shown as 0-100% if there is massive amounts of artifact then the PSI will show as a (–)

Question 5

5 Step Process of using EEG

Answer 5

1. Baseline Clinical exam, also Calculate an ACCURATE RASS
2. Analyse raw EEG data
3. Assess the EMG%, Assess the Artifact %, Assess for suppression ratio %
4. Assess the DSA [Digital Spectral Array] and SEF [Spectral Edge Frequency] and does it correlate
5. Correlate all the data gained through the EEG and brain function monitoring assessment to the clinical exam.

Question 6

EEG Waves

Answer 6

2. Analyse raw EEG data
   a. Beta means awake range >13hz (Oscillation cycles/second)
   b. Alpha means lightly sedated 8-12hz
   c. Theta means more deeply sedated 4-8hz
   d. Delta means very sedated 0.5-4hz

Question 7

Assessing the DSA [Digital Spectral Array] and SEF [Spectral Edge Frequency]

Answer 7

a. SEF identified a point where 95% of the power of the EEG is below
i. The higher the SEF generally means the lighter the patient
ii. The lower the SEF generally means the deeper the patient

DSA shows in colour what wave-pattern they are in from SEF