Deterioration after inflation of a PASG in a patient with high‑pressure abdominal trauma most likely represents which injury?

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Multiple Choice

Deterioration after inflation of a PASG in a patient with high‑pressure abdominal trauma most likely represents which injury?

Inflating a PASG in this setting can push abdominal contents through a diaphragmatic tear into the chest, causing rapid deterioration. A ruptured diaphragm allows viscera to herniate upward when intra‑abdominal pressure rises from the garment, collapsing lung tissue, reducing ventilation, and impairing venous return. This sudden ventilation and circulation collapse explains why the patient worsens after PASG inflation in high‑pressure abdominal trauma—the pattern is most consistent with diaphragmatic rupture with visceral herniation. Other injuries don’t fit the sequence as neatly. An abdominal aortic aneurysm isn’t specifically driven by PASG inflation and wouldn’t explain immediate respiratory collapse from chest compression. A ruptured esophagus would present with signs like mediastinal air or infection, not the immediate PASG‑induced deterioration. Paper bag syndrome of the lungs describes CO2 retention from rebreathing and isn’t caused by the mechanical effects of PASG in this trauma scenario.

Inflating a PASG in this setting can push abdominal contents through a diaphragmatic tear into the chest, causing rapid deterioration. A ruptured diaphragm allows viscera to herniate upward when intra‑abdominal pressure rises from the garment, collapsing lung tissue, reducing ventilation, and impairing venous return. This sudden ventilation and circulation collapse explains why the patient worsens after PASG inflation in high‑pressure abdominal trauma—the pattern is most consistent with diaphragmatic rupture with visceral herniation.

Other injuries don’t fit the sequence as neatly. An abdominal aortic aneurysm isn’t specifically driven by PASG inflation and wouldn’t explain immediate respiratory collapse from chest compression. A ruptured esophagus would present with signs like mediastinal air or infection, not the immediate PASG‑induced deterioration. Paper bag syndrome of the lungs describes CO2 retention from rebreathing and isn’t caused by the mechanical effects of PASG in this trauma scenario.

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