Document Detail

The collateral network concept: remodeling of the arterial collateral network after experimental segmental artery sacrifice.
MedLine Citation:
PMID:  21419904     Owner:  NLM     Status:  MEDLINE    
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.
Christian D Etz; Fabian A Kari; Christoph S Mueller; Robert M Brenner; Hung-Mo Lin; Randall B Griepp
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  The Journal of thoracic and cardiovascular surgery     Volume:  141     ISSN:  1097-685X     ISO Abbreviation:  J. Thorac. Cardiovasc. Surg.     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-03-22     Completed Date:  2011-05-16     Revised Date:  2014-09-18    
Medline Journal Info:
Nlm Unique ID:  0376343     Medline TA:  J Thorac Cardiovasc Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1029-36     Citation Subset:  AIM; IM    
Copyright Information:
Copyright © 2011 The American Association for Thoracic Surgery. Published by Mosby, Inc. All rights reserved.
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MeSH Terms
Arteries / pathology,  physiopathology,  surgery
Collateral Circulation*
Corrosion Casting
Microscopy, Electron, Scanning
Microvessels / pathology,  physiopathology
Regional Blood Flow
Spinal Cord / blood supply*
Time Factors
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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