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Develops a finite element injury metric for pulmonary contusion, indicating new injury thresholds.
High-rate non-penetrating blunt impacts (NPBI) to the thorax can induce pulmonary contusion. We develop a finite element-based injury metric for pulmonary contusion. The outcomes from an ovine model were compared to strain-based measures in a finite element ovine thorax model. Injury outcome was classified by gross lung injury score (GLIS) and lung injury volume (LIV). LIV was used to determine subject-specific injury thresholds. Values were aggregated into a cumulative distribution function. GLIS and LIV showed reasonable agreement, with GLIS being more inclusive of the overall lung injury severity. The average subject specific-injury threshold was 0.32 ± 0.13 1st principal strain.
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Caffrey et al. (2026) studied this question.
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