Fig. 5

Criteria for suitability for inspiratory muscle training for ICU patients. PEEP positive end-expiratory pressure, FiO₂ fraction of inspired oxygen, RR respiratory rate, MIP maximum inspiratory pressure, NIF negative inspiratory force (measured on the ventilator). *Recently weaned means independently breathing 24 hours per day without any invasive ventilatory support. (Reproduced from [14] with permission)