Stages And Planes

Question 1

Stage 1

Answer 1

From beginning of induction to the loss of consciousness (no amnesia/analgesia to total amnesia/analgesia)

Question 2

Stage 2

Answer 2

From LOC to onset of automatic rhythmicity of VS. responses are exaggerated and violent, eyelids deviated, dangerous stage, vomiting

Question 3

Stage 3 (Surgical Plane)

Answer 3

From end of II to cessation of respiration

Plane 1: full respiration, loss of lid reflex, loss of vomiting reflex

Plane 2: resp. Regular but diminished, eyes fixed and slight diverged

Plane 3: diaphragmatic respiration with intercostal paralysis, RR increased and TV decreased, pupillary dilation, hypotension and tachy

Plane 4: resp. Shallow, complete muscle relaxation, pupil dilation, BP falling with accelerated pulse

Question 4

Stage 4 (medullary paralysis)

Answer 4

Cessation of respiration to death
All reflexes absent
Flaccid paralysis
Marked hypotension with weak, irregular pulse

Question 5

General Anesthesia

Answer 5

Stable administration of drugs
Arousal not possible
Analgesia, akinesia

Question 6

Emergence Phase 1

Answer 6

Cessation of anesthetic drugs
Reversal of muscle relaxants
Apnea to regular breathing

Question 7

Emergence phase 2

Answer 7

Increase HR/BP 
Return of autonomic response
Respond to pain
Swallow/gagging
Muscle tone
Defensive posturing
Extubation possible

Question 8

Emergence Phase 3

Answer 8

Eye opening
Respond to oral commands
Extubation possible