LOADING AWESOME
CRANIAL NERVES
PART ONE
Nuclei Abbreviations:
GSA = General Somatic Afferent
GSE = General Somatic Efferent
GVE-P = General Visceral Efferent (P-type)
SVA = Somatic Visceral Afferent
SVE = Somatic Visceral Efferent
www.propofology.com
Dr. David Lyness
@Gas_Craic
Consider Brainstem Death Testing
- Pupils must be fixed and not responsive to light (cranial nerves II, III)
- There must be no corneal reflex (cranial nerves V, VII)
- Vestibulo-ocular reflexes are absent, i.e. no eye movement occur at ice cold saline into the auditory meatus (cranial nerves, III, IV, VI, VIII) (caloric)
- No facial movement will occur in response to supra-orbital pressure (cranial nerves V, VII)
- No gag reflex to posterior pharyngeal wall stimu lation (cranial nerve IX)
- No cough or other reflex in response to bronchial stimulation with a suction catheter passed down the tracheal tube (cranial nerve X)
- No respiratory movements will occur when disconnected from the ventilator, hypoxia is prevented with pre-oxygenation & a tracheal catheter. PaCO2 should be >6.65 kPa.
