BIS Monitoring

Question 1

BIS uses EEG analysis as a measure of ____

Answer 1

awareness

Question 2

The numeric values for BIS refer to

Answer 2

LOC

Question 3

EEG when awake shows ____ amplitude and ____ frequency

Answer 3

low amplitude

high frequency

Question 4

EEG for the deeply anesthetized pt shows ____ amplitude and _____ frequency

Answer 4

high amplitude

low frequency

Question 5

Potential benefits of BIS monitoring

Answer 5

Lower risk of awareness
More rational selection of CV interventions (in deciding if something is d/t pain or something CV related)
Better management of response to surgical stimulation
Faster wake-up and recovery
More cost-effective use of drugs

Question 6

Lower BIS value correlates with increasing

Answer 6

hypnosis

Question 7

Effect of opioids on consciousness

Answer 7

No significant influence on consciousness

Question 8

Increased in perceived stimulus on BIS leads to

Answer 8

lightening of hypnosis

Question 9

These factors can alter the BIS number

Answer 9

Ischemia or severe hypoxia
Hypothermia
Artifacts

Question 10

Pts are at risk for recall as the BIS value climbs towards ____

Answer 10

70

Question 11

Conscious sedation would fall into this BIS range

Answer 11

70-100

Question 12

When BIS is below _____, the patient is considered unconscious

Answer 12

60

Lower than 60 is the maintenance range for anesthesia

Question 13

BIS less than 40 can be caused by

Answer 13

Deep anesthesia
High dose opioid anesthesia
Barbiturate coma
Profound hypothermia

Question 14

BIS numbers and their stages

Answer 14

100 = Awake
70 = Light hypnotic effects
60 = Moderate hypnotic effects
40 = Deep hypnotic effects
0 = EEG Suppression

Question 15

General anesthesia is considered to be between these values

Answer 15

45-60

Question 16

If placed correctly, electrode 4 will be placed directly over the _____ muscle

Answer 16

frontalis

This makes the BIS more sensitive to muscle movement.