Weaning-induced cardiac dysfunction is one of the most frequent and treatable causes of weaning failure. Dres et al initiated a study to determine whether the presence of cardiac preload independence before a spontaneous breathing trial (SBT) is associated with weaning failure related to cardiac dysfunction.
They found that detection of cardiac preload independence by passive leg raising (PLR) performed before an SBT reliably predicted the occurrence of weaning-induced cardiac dysfunction. These study results provide compelling support for using PLR as an assessment tool for SBT failure. It is now a matter of waiting for confirmatory studies.
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