Lung Ventilation During Diaphragmatic Breathing

Diaphragmatic fatigue and breathing pattern during weaning from mechanical ventilation in COPD patients.

The medium-term outcome of weaning from mechanical ventilation in COPD patients is not easy to anticipate because a respiratory fatigue may eventually develop. We evaluated the diaphragmatic function and the breathing pattern during 40 weaning trials on 15 patients ventilated after acute respiratory failure. We formed two groups according to the success (group B, n = 18) or failure (group A, n ...

Diaphragmatic contraction during assisted mechanical ventilation.

Indirect evidence from airway pressure recordings in mechanically ventilated patients suggests that the diaphragm exhibits contractile activity beyond that required to trigger a ventilator-assisted breath. We used the diaphragmatic EMG to provide direct evidence of persistent contractile activity and studied the effects of alterations in ventilator-delivered flow rate and tidal volume on the du...

Diaphragmatic strength during weaning from mechanical ventilation.

Respiratory muscle weakness is considered to be a factor in the inability to wean from mechanical ventilation. To assess this possibility, the present study examined the mechanical behavior of the diaphragm by measuring the change in transdiaphragmatic pressure (delta Pdi) during weaning. Nine "T-piece" weanings were carried out in seven patients with prior weaning failure and were terminated w...

Spontaneous breathing during high-frequency oscillatory ventilation improves regional lung characteristics in experimental lung injury.

BACKGROUND Maintenance of spontaneous breathing is advocated in mechanical ventilation. This study evaluates the effect of spontaneous breathing on regional lung characteristics during high-frequency oscillatory (HFO) ventilation in an animal model of mild lung injury. METHODS Lung injury was induced by lavage with normal saline in eight pigs (weight range 47-64 kg). HFO ventilation was appli...

The Breathing-Book Spontaneous breathing during artificial ventilation