To reduce work of breathing

Assisted ventilation ± sedation and muscle relaxation reduces respiratory muscle activity and thus the work of breathing. In cardiac failure or non-cardiogenic pulmonary oedema the resulting reduction in myocardial oxygen demand is more easily matched to the supply of oxygen.

Indications for ventilatory support

Ventilatory support (invasive or non-invasive) should be considered if:

Respiratory rate >30/min Vital capacity <10-15ml/min PaO2 < 11kPa on FIO2>0.4

PaCO2 high with significant respiratory acidosis (e.g. pH <7.2)

Exhaustion

Confusion

Severe shock

Severe LVF

Raised ICP

0 0

Post a comment