Interpreting wasted ventilation in EIT assessment of pulmonary embolism: ventilation-weighted high-V/Q burden versus perfusion-defect burden

Description

Chenyi Di, Yun Long, and Huaiwu He wrote a 2026 letter on a study of electrical impedance tomography, a bedside imaging method, for detecting pulmonary embolism. The study had combined animal vessel blockage, advanced CT comparisons, and patient validation. Di and co-authors praise the regional model while disputing how its headline index should be read.

Their point is that the wasted-ventilation index tracks a ventilation-weighted pattern of air reaching under-perfused lung regions, not the total burden of blocked vessels. Equating the score with anatomical clot burden, they warn, overstates what the test shows. The distinction matters for how clinicians phrase diagnoses and judge severity. They frame the index as a physiological phenotype score within a growing bedside monitoring approach.

Catalog record

Source: https://europepmc.org/articles/PMC13238128