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Background  The intensity of the electrical activity of the diaphragm (Edi) correlates with inspiratory effort. The ratio of tidal volume to the Edi is known as neuroventilatory efficiency (NVE) and is used as an index for ventilation efficiency. Here, we present a case showing that Edi and NVE may be effective parameters to predict successful extubation.    Case presentation  A 6-month-old female infant required prolonged mechanical ventilation after cardiac surgery. Fifty-two days after surgery, her trachea was extubated but required reintubation. Edi monitoring was initiated to assess diaphragm function. The Edi was > 70 mcV just after the reintubation, and her NVE was 1.0 mL/mcV, but gradually decreased. On day 59, her Edi values during the spontaneous breathing trials were 13 mcV with the improvement of NVE (2.5 mL/mcV) and her trachea was extubated without complications.    Conclusions  The Edi and NVE were valuable for deciding the extubation readiness in a long-term mechanically ventilated patient.

Predicting extubation readiness by monitoring the electrical activity of the diaphragm after prolonged mechanical ventilation: a pediatric case report