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Predictors of the need for mechanical ventilation8
| Onset of bulbar symptoms |
| Inability to raise arms/elbow above head or inability to stand in Guillain-Barré syndrome |
| Rapid progression of muscular weakness |
| VC < 15 mL/kg or VC < 1 liter |
| A 50% reduction of VC from admission |
| Maximum inspiratory pressure > −30 cm H2O |
| Maximum expiratory pressure < 40 cm H2O |
Note: Partially based on data from reference 8.
Abbreviation: VC, vital capacity.
