PMC9121005_01
(A) Damaged veins remain open under the pneumopelvis. (B) "Bubble sign" after carbon dioxide enters the damaged vein.
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F1
Due to the pneumopelvic pressure, the breach did not bleed but rather changed into a circular cavity (Figure 1A). During the pneumopelvic deflation, several gas bubbles appeared in the vascular breach (Figure 1B).