BIS monitoring Flashcards

1
Q

BIS uses EEG analysis as a measure of ____

A

awareness

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2
Q

The numeric values for BIS refer to

A

LOC

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3
Q

EEG when awake shows ____ amplitude and ____ frequency

A

low amplitude

high frequency

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4
Q

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

A

high amplitude

low frequency

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5
Q

Potential benefits of BIS monitoring

A
  • 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
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6
Q

Lower BIS value correlates with increasing

A

hypnosis

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7
Q

Effect of opioids on consciousness

A

No significant influence on consciousness

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8
Q

Increased in perceived stimulus on BIS leads to

A

lightening of hypnosis

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9
Q

These factors can alter the BIS number

A
  • Ischemia or severe hypoxia
  • Hypothermia
  • Artifacts
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10
Q

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

A

70

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11
Q

Conscious sedation would fall into this BIS range

A

70-100

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12
Q

When BIS is below _____, the patient is considered unconscious

A
  • 60
  • Lower than 60 is the maintenance range for anesthesia
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13
Q

BIS less than 40 can be caused by

A
  • Deep anesthesia
  • High dose opioid anesthesia
  • Barbiturate coma
  • Profound hypothermia
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14
Q

BIS numbers and their stages

A
  • 100 = Awake
  • 70 = Light hypnotic effects
  • 60 = Moderate hypnotic effects
  • 40 = Deep hypnotic effects
  • 0 = EEG Suppression
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15
Q

General anesthesia is considered to be between these values

A

45-60

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16
Q

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

A

frontalis

This makes the BIS more sensitive to muscle movement.