Federico Franchi, Emanuele Detti, Alberto Fogagnolo, Savino Spadaro, Gabriele Cevenini, Gennaro Cataldo, Tommaso Addabbo, Cesare Biuzzi, Daniele Marianello, Carlo Alberto Volta, Fabio Silvio Taccone, Sabino Scolletta
Transpulmonary pressure (PL ) calculation requires esophageal pressure (PES ) as a surrogate of pleural pressure (Ppl), but its calibration is a cumbersome technique. Central venous pressure (CVP) swings may reflect tidal variations in Ppl and could be used instead of PES , but the interpretation of CVP waveforms could be difficult due to superposition of heartbeat-induced pressure changes. Thus, we developed a digital filter able to remove the cardiac noise to obtain a filtered CVP (f-CVP). The aim of the study was to evaluate the accuracy of CVP and filtered CVP swings (ΔCVP and Δf-CVP, respectively) in estimating esophageal respiratory swings (ΔPES ) and compare PL calculated with CVP, f-CVP and PES; then we tested the diagnostic accuracy of the f-CVP method to identify unsafe high PL levels, defined as PL >10 cmH2 O...
March 21, 2024: Journal of Clinical Monitoring and Computing