Stages of anesthesia Flashcards
which stage has primary analgesia and disorientation?
stage I
what happen to the patient during stage I? (2)
- sensory cortex depression
2. amnesia
when is stage I complete?
when there is loss of conciousness
what is sensory cortex depression?
causes animal to become disoriented and experiene analgesia
wht stage is there loss of conciousness with delrium and lack of inhibition?
stage II
what is another name for stage II?
excitatory stage
how can the patient react during this stage? (2)
- involuntary movement
2. reflex struggling
what stage is motor cortex depression seen?
stage II
when is stage II usually seen?
if anesthetic is administered slowly
what are the plane of stage III? (4)
plane 1 - light surgical
plane 2 - moderate surgica
plane 3 - deep surgical
plane 4 - very deep surgical
what stage is considered to be surgical anesthesia stage?
stage III
what are the signs you will see with the patient in stage III? (3)
1, unconciousness
- progressive system depression
- spinal cord depression
which stage is the toxic or premortem stage
stage IV
what can occur during stage IV?
cessation of respiration followed by cardiac arrest
what physical signs of the patient are monitored? (5)
- ocular signs
- respiratory system
- cardiovascular system
- reflexed
- muscle tone
what is the eye position at stage 3, plane 2?
ventral medial
what eye movement can be seen at plane 1
nystagmus
which species is nystagmus common in?
horses
what will the eye size be if at to deep of a plane?
dilates
when does palpebral reflexes disappear?
plane 2
when does corneal reflexes disappear?
plane 3
what are the respiratory signs under anesthesia?
rate will decrease as anesthesia depth increases
what cardiovascular signs can be seen under anesthesia?
HR and BP decrease as anesthesia increases
which stage does intubation occur?
stage 3, plane 1 or 2
