Comparison of methods to quantify lung overdistension and tidal recruitment based on EIT

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dc.creatorMarina Cavalcante Rocha
dc.creatorRafael Ribeiro Gurgel
dc.creatorPhilip Simon
dc.creatorHermann Wrigge
dc.creatorAlessandro Beda
dc.date.accessioned2025-04-10T15:30:55Z
dc.date.accessioned2025-09-09T01:13:54Z
dc.date.available2025-04-10T15:30:55Z
dc.date.issued2018
dc.identifier.doi10.29327/xiseb.128302
dc.identifier.urihttps://hdl.handle.net/1843/81460
dc.languagepor
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofXI Simpósio de Engenharia Biomédica
dc.rightsAcesso Restrito
dc.subjectRespiração Artificial DeCS
dc.subjectVentilação não Invasiva DeCS
dc.subjectImpedância (Eletricidade)
dc.subject.otherElectric impedance tomography, Mechanical ventilation, Overdistension, Tidal recruitment
dc.subject.otherimproper MV settings may lead to alveolar overdistension (OD) and tidal recruitment (TR), which increase the risk of ventilator-induced lung injury
dc.titleComparison of methods to quantify lung overdistension and tidal recruitment based on EIT
dc.typeArtigo de evento
local.citation.spage1
local.description.resumoProtective ventilation strategies have been proposed to minimize the occurrence of lung overdistension (OD), as well as the presence of tidal recruitment (TR) of airways and alveolar units. In this context, Electrical Impedance Tomography (EIT) emerges as a noninvasive, radiation-free imaging technique, for bedside monitoring the regional distribution of ventilation in the lungs. Different EIT methods exist to quantify OD and TR: 1) PVShape quantifies the curvature of the pressure-volume curve during inspiration (PVShapeinsp) and expiration (PVShapeexp); 2) the algorithm RACH is based on the estimation of the compliance changes in each element through the PEEP steps. Thus, the objective of this study is to compare these published algorithms to quantify changes in spatial distribution of OD and TR during mechanical ventilation. EIT was collected from 19 mechanically ventilated surgical patients during a decremental positive end-expiratory pressure (PEEP) titration maneuver. The proportion of TR and OD at each PEEP step was computed from EIT according with each algorithm. The spatial distribution of OD and TR was significantly affected by PEEP changes. Compared to the other methods, the estimates of TR were considerably higher with PVShapeinsp (more than 60% larger, p<0.001). While the higher significant proportion of OD was found in the PVShapeexp (more than 6% larger, p<0.001). This study demonstrates a significant disagreement between TR and OD quantified by these three EIT-based methods. Despite the statistic difference between RACH and PVShapeexp, these methods present information that appears to be reasonably compatible.
local.publisher.countryBrasil
local.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA ELETRÔNICA
local.publisher.initialsUFMG
local.url.externahttps://www.even3.com.br/anais/xiseb/128302

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