Medicine
Hemodynamic Optimization Guided by Pulse Pressure Variation
Quick fact
A pulse pressure variation greater than 13% during mechanical ventilation is a powerful predictor that the heart will respond to a fluid bolus, which is far more reliable than traditional static measurements like central venous pressure.
Why this is interesting
Why can the same blood pressure reading be a good reason to give fluids for one patient, and a reason to hold fluids for another? The answer lies in a dynamic signal hidden within the pulse.