1-Documentation of symptoms and signs in the medical file:
Progressive weakness of arms and legs for no more than 4 weeks..
By examination: absent or decreased deep tendon reflexes in affected limbs.
2- Electrophysiological studies (showing evidence of neuropathy) if available.
3- CSF analysis (showing cyto-albuminuous dissociation), if diagnosis is uncertain
4- IVIg (0.4 g/kg/day for 5 days) or plasma exchange 4-5 sessions should be started if GBS-DS grade 3 or more in first 2 weeks OR grade 2 in patients who have a fast rate of deterioration, a risk of requiring ventilatory support, swallowing difficulties, autonomic disturbances or poor prognostic factors
5- Documentation of the risk factors for requiring mechanical ventilation
-Rapid progression of limb weakness during hospital admission
- GBS- DS grade 4 (unable to walk 5 m even with aid)
- Neck flexion, facial or bulbar weakness
- The inability to cough
- Autonomic instability such as fluctuations in blood pressure or heart rate.
6-Single breath count (SBC) to assess any decline in respiratory function.