Intermittent mandatory ventilation IMV

The set mandatory rate is gradually reduced as the spontaneous rate increases. Spontaneous breaths are usually pressure supported to overcome circuit and ventilator valve resistance. With this technique it is important that the patient's required minute ventilation is provided by the combination of mandatory breaths and spontaneous breaths without an excessive spontaneous rate. The reduction in mandatory rate should be slow enough to maintain adequate minute ventilation. It is also important that the patient can synchronise his own respiratory efforts with mandatory ventilator breaths; many cannot, particularly where there are frequent spontaneous breaths, some of which may 'stack' with mandatory breaths causing hyperinflation.

0 0

Post a comment