2. What Is ARDS?
ARDS, or acute respiratory distress syndrome, is a lung
condition that leads to low oxygen levels in the blood.
ARDS can be life threatening because your body's
organs need oxygen-rich blood to work well.
3. ARDS can be caused by any major injury to the
lung :
5. PATHOPHYSIOLOGY:
Pathophysiologic similarities that relate to the
management of MV :
interstitial edema , alveolar flood, surfactant
dysfunction, small airway dysfunction.these produce
stiff,low compliance, atelectasis,reduce lung volumes.
6. PATHOPHYSIOLOGY:
Parenchymal injury also can affect the airways,
especially the bronchioles and alveolar ducts.Injred
small airways are narrowed and collapsible. These
produce low regional ventilation to injured lung units
also can lead to regions of air trapping.
9. GOALS OF VENTILATORY SUPPORT:
Goal of MV is to provide adequate gas exchange while
avoiding lung injury.gas exchange goals has occurred
over the last 2 decades and now pH goals as low as 7.15
and Po2 as low as 55 mm Hg are often considered
acceptable if the lung can be protected from ventilator
induced lung injury (VILI).
10. Settings:
Recommend that initial VT should be 6 ml/kg ideal
body weight
Pplat remains below 30 cm H2O
Frequncy generally is used to control the CO2 from 12
to 35 breaths per minute.provide an adequate
expiratory time to prevent air trapping.
11. High frequency ventilation:
HFV has been shown to improve outcomes in many
studies of infants with respiratory failure.the adult
HFV is much smaller,but has shown HFV to safely
provide adequate gas exchange.HFV is generally used
only when lung protection is judged inadequate using
conventional techniques.
