The collateral network concept: Remodeling of the arterial collateral network after experimental segmental artery sacrifice

被引:159
作者
Etz, Christian D. [1 ,3 ]
Kari, Fabian A. [1 ,4 ]
Mueller, Christoph S. [1 ]
Brenner, Robert M. [1 ]
Lin, Hung-Mo [2 ]
Griepp, Randall B. [1 ]
机构
[1] Mt Sinai Sch Med, Dept Cardiothorac Surg, New York, NY 10029 USA
[2] Mt Sinai Sch Med, Dept Anesthesiol, Div Biostat, New York, NY 10029 USA
[3] Univ Leipzig, Heartctr, Dept Cardiac Surg, Leipzig, Germany
[4] Univ Med Ctr Freiburg, Ctr Cardiovasc, Dept Cardiovasc Surg, Freiburg, Germany
关键词
THORACOABDOMINAL ANEURYSM REPAIR; SPINAL-CORD PERFUSION; ARTERIOGENESIS; ANGIOGENESIS; PARAPLEGIA; MECHANISMS;
D O I
10.1016/j.jtcvs.2010.06.017
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Objective: A comprehensive strategy to prevent paraplegia after open surgical or endovascular repair of thoracoabdominal aortic aneurysms requires a thorough understanding of the response of the collateral network to extensive segmental artery sacrifice. Methods: Ten Yorkshire pigs underwent perfusion with a low-viscosity acrylic resin. With the use of cardiopulmonary bypass, 2 animals each were perfused in the native state and immediately, 6 hours, 24 hours, and 5 days after sacrifice of all segmental arteries (T4-L5). After digestion of surrounding tissue, the vascular cast of the collateral network underwent analysis of arterial and arteriolar diameters and the density and spatial orientation of the vasculature using light and scanning electron microscopy. Results: Within 24 hours, the diameter of the anterior spinal artery had increased significantly, and within 5 days the anterior spinal artery and the epidural arterial network had enlarged in diameter by 80% to 100% (P < .0001). By 5 days, the density of the intramuscular paraspinous vessels had increased (P < .0001), a shift of size distribution from small to larger arterioles was seen (P = .0002), and a significant realignment of arterioles parallel to the spinal cord had occurred (P = .0005). Conclusions: Within 5 days after segmental artery occlusion, profound anatomic alterations in the intraspinal and paraspinous arteries and arterioles occurred, providing the anatomic substrate for preservation of spinal cord blood flow via collateral pathways. (J Thorac Cardiovasc Surg 2011;141:1029-36)
引用
收藏
页码:1029 / 1036
页数:8
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