Cephalic Versus Digital Plethysmographic Variability Index Measurement: A Comparative Pilot Study in Cardiac Surgery Patients

摘要

Objectives: Noninvasive measurement of digital plethysmographic variability index (PVIdigital) has been proposed to predict fluid responsiveness, with conflicting results. The authors tested the hypothesis that cephalic sites of PVI measurement (namely PVIear and PVIforehead) could be more discriminant than PVIdigital to predict fluid responsiveness after cardiac surgery.