ARDS Flashcards
what four things do you need for ARDS?
1-acute onset
2-bilateral opacities
3-respiratory failure not totally explained by cardiac failure or fluid overload
4-Hypoxia
what is the equation to measure hypoxia?
PaO2/FiO2
what are the cutoffs for hypoxia in mild moderate severe ARDS?
mild-300
moderate-200
severe-100
what two types of lung injuries lead to ARDS?
indirect lung injury and direct lung injury
what is a common direct injury to lung that leads to ARDS?
pneumonia
name four indirect injuries that lead to ARDS?
burns
trauma
sepsis
pancreatitis
in ARDS where does fluid accumulate?
in interstitum and alveoli
what happens to surfactant in ARDS?
becomes dysfunctional and can lead to atelectasis
the interstitial fluid accumulation in ARDS leads to what physiologic issue?
a shunt
what are the two stages of ARDS?
exudative stage then proliferative stage
what two things happen in exudative stage of ARDS?
edema and hyaline membranes
what two things occur in the proliferative stage of ARDS?
interstitial inflammation and interstitial fibrosis
what occurs first the exudative or proliferative stage in ARDS?
exudative
what is the first part of the exudative stage to occur?
edema
what are the two adjustments to make with ARDS that def have mortality improvement?
lung protective ventilation and put them in prone or on belly position
