Stages of anesthesia Flashcards
Stages of anesthesia
stage I -analgesia or induction stage II -excitment/delerium stage III -surgical operative stage stage IV -danger stage
what occurs in stage I of anesthesia (induction)
HEARING IS INCREASED
unreality
sense of dizziness
lessening of sensitivity to pain/touch
what occurs in stage II of anesthesia (excitment)
Lacrimation disconjugated pupils hyperventilation laryngospasms retching increased VS reactions involving muscular activity and delerium
what occurs in stage III of anesthesia (operative)
4 planes
plane 1
-light for sugical anesthesia
–has blink and swallow reflexes
–regular respirations with good chest motion
plane 2
-Most vets perform sx here
–loss of blink reflex
–pupils fixed in one position (central)
–respirations still good with use of chest muscles
plane 3
-stars to lose ability to use chest muscles and abd muscles
–shallow breathing
–usually may require assisted ventilation
plane 4
-No use of chest muscles and abd muscles
-all respirations are produced by diaphragm
Stage III anesthesia Plane 1
MAC amnesia (25%)
light for sugical anesthesia
–has blink and swallow reflexes
–regular respirations with good chest motion
Stage III anesthesia Plane 2
MAC Awake (50%) Most vets perform sx here --loss of blink reflex --pupils fixed in one position (central) --respirations still good with use of chest muscles plane 3
Stage III anesthesia Plane 3
MAC EI (130%)
stars to lose ability to use chest muscles and abd muscles
–shallow breathing
–usually may require assisted ventilation
Stage III anesthesia Plane 4
MAC BAR (150%)
No use of chest muscles and abd muscles
-all respirations are produced by diaphragm
instead of using planes in stage III what else can be used and descripe
MAC amnesia (25%) MAC Awake (50%) -pt loses conciousness and recall MAC EI (130%) -loss of motor, semsory, recall, and SNS MAC BAR (150%) -adrenergic and CV response blocked
Stage IV anesthesia
anesthesia crisis
- dnager/toxic stage
- cardiopulmonary failure/ death
