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Start FR Alg
Give Fluid Challenge
Measure VTI or SV before and immediately after 250ml bolus bolus challenge if clinically indicated. Fluid responsive does not mean they need fluid but that they should respond by increasing cardiac output.

You are probably on the steep portion of the FS curve (above)
Fluid Given?
First Fluid Callenge
Testing
Stop fluid challenge
No signs hypo1
PLR
No signs hypo2
Test for Predictors of Fluid Responsiveness