A patient is cannulated for VV ECMO due to acute lung injury secondary to H1N1 flu. The patient…

A patient is cannulated for VV ECMO due to acute lung injury
secondary to H1N1 flu. The patient initially required a pump flow of 4 L/min
and sweep of 10 L/min to achieve the desired gas exchange. After 5 days on
resting ventilator settings, an improvement in both CXR and lung compliance is
noted. Additionally, PaO2 with the ventilator FiO2 at 1.0
is markedly improved: on day 1 it had been 50 mm Hg and after 5 days is now 220
mm Hg. What changes should be made to assess the patient’s readiness to wean
off of VV support?

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