Pressure controlled ventilation

Pressure controlled ventilation with decelerating Flow

Field of Use:

Anesthesia in patients suffering from a lung disease (inhomogeneous lung), neonates, children mask ventilation, pulmonary fistulae, laryngeal masks, inversed ratio ventilation, in relaxed or partially relaxed patients.

Pressure-controlled ventilation with fixed pressure limit "Pinsp" and frequency "1/freq". Synchronization and adjustable pressure support of spontaneous breaths (optional) are switchable.

A continuous flow is applied to the patient during the inspiratory time "Tinsp". The curve's rate of rise can be preset with the slope increase time "TSlope". The maximum time delay between the controlled ventilation breaths is adjusted by means of the frequency. To keep the frequency constant in the event of a premature triggering, the time is equalized in the next cycle.

Changes to the lung compliance and the ventilation parameters affect the tidal volume.

Synchronization of pressure-controlled ventilation and spontaneous breathing

Synchronization is activated as soon as a trigger value is entered.

The message "sync" is displayed in the ventilation mode status field on the screen.

The flow trigger sensitivity controls the synchronization.

A breath triggered by the patient is indicated by a continuous line in the pressure curve and in the flow curve (trigger indicator). The active flow trigger window corresponds to the last 25% of the relevant expiratory time.

Using this ventilation mode allows reduced interaction with the anesthesia system during recovery and enables a smooth transition from controlled ventilation to spontaneous breathing.

The adjustable flow trigger reduces the work of breathing during the spontaneous breathing phases.