Guillain-Barre syndrome

Bilateral flaccid ascending weakness... classically after campylobacter.
Etiology Sensitising infections include influenza/Parainfluenza, Epstein-Barr virus, Campylobacter, HIV, Mycoplasma pneumonia...
Epidemiology Preceding diarrhoeal illness - poor prognosis.
Clinical presentation ascending flaccid weakness - starts distally, absent reflexes
autonomic instability
Pathogenesis
Diagnostic investigations FVC
LP - ↑ CSF protein; anti-ganglionoside abs (serum) - Miller-Fisher syndrome
Management IVIG or Plasma exchange
Steroids are counterproductive
Tracheostomy depends on pace of resp wean if invasively ventilated