First stage of surgical anaesthesia is:
|B||Loss of consciousness|
|C||Cessation of eyeball movement|
Cessation of eyeball movement
Guedel described four stages with ether anaesthesia, dividing the III stage into 4 planes (frequently asked in).
a. Stage of Analgesia
b. Stage of Delirium
c. Stage of Surgical anaesthesia
Plane 1 Roving eye balls. Plane ends with cessation of eyeball movement.
Plane 2 Loss of corneal and laryngeal reflexes.
Plane 3 Pupil starts dilating and light reflex is lost.
Plane 4 Intercostal paralysis, shallow abdominal respiration, dilated pupil.
IV. Stage of Medullary paralysis