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Flashcards in BIS/PNS reduced Deck (4)
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1

BIS minitor

What is it

Goals and numerical values

Benifits

Uses EEG analysis as and index of awareness

  1. Awake vs Deeply anestheitzed EEG
    • Awake = LOW amplitude, HIGH frquency
    • Deeply anesthetized = High Amlitude, LOW frequency

GOAL = maintinenc between 40 and 60 (<40 used for cardiac sugery)

​The lower the value the deeper the sedation (continuum from 100→ 0)

  • 100 = awake
    • awake or resting state
    • concious sedation
    • response to vigerous stimulation durring surgery
    • Emergence from general anesthesia 
  • 70 = Light hypnotic effects
    • light anesthesia
    • < 70 = little probability of recall
  • 60 = Moderate hypntic effects
    • can be used for surgical procedures
    • < 60 = unconciousness
  • 40 = deep hypnotic effects
    • can be used for surgical procedures
    • High dose opioid anesthesia
    • Barbiturate coma
    • Profound Hypothermia
  • 0 = EEG supression

Benifits of BIS monitoring

  • 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

2

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

frontalis

This makes the BIS more sensitive to muscle movement.

3

How do you place the BIS monitor

  1. Cleanse the forehead with alcohol
  2. place electrodes at a diagonal angle with electrode #4 on the frontalis muscle
  3. press on the outer edge to attach electrodes
  4. Then press on the center of each electrode

4