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In type B aortic dissection, a thrombosed false lumen with ulcer-like projections and a patent false lumen had an influence on late aortic dilation and late aortic events.

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Rabbits with 15-minute aortic clamping in the infrarenal portion showed delayed paraplegia, and those with back-bleeding from lumbar arteries showed early onset of paraplegia. The prevention of back-bleeding from intercostal arteries and lumbar arteries during thoracoabdominal aortic surgery was considered to reduce spinal ischemic injury.