Relationship Between Formed Components Of Porcine Common Carotid Artery (Cca) And Vascular Compliance
Keywords
Common Carotid Artery (Cca), Elastic Fibers, Collagen Fibers, Compliance, Domestic Pig
Abstract
Objective To explore the main histological components of the proximal and distal segments of the normal adult pig common carotid artery (CCA) and the specific pressure segments (low pressure segment: 50~90mmHg, normal pressure segment: 80~120mmHg, high pressure segment: 110~150mmHg, 1mmHg=0.133kPa, the same below) the relationship between circumferential compliance. Methods Bilateral CCA of normal adult domestic pigs was taken, and special staining methods were used to detect the percentage of collagen fibers and elastic fibers in the left proximal and distal segments of the tunica media. HE staining was used to detect the smooth muscle cells (SMC) per unit area of the media. The number; Bose biodynamic tester detects the circumferential compliance of the right common carotid artery. Results: The lumen area and intima-media thickness of the proximal segment were significantly larger than those of the distal segment, and the percentage of elastic fibers in the media area of the proximal segment was greater than that of the distal segment; the difference in the number of SMCs per unit area in the media of the proximal segment and the distal segment was not statistically significant; There is no statistical significance in the content of collagen fibers between the proximal and distal segments. There are more type I collagen fibers in the proximal segment than in the distal segment, while there are more type III collagen fibers in the distal segment than in the proximal segment. The vascular compliance reaches its maximum value in the normal pressure segment. Conclusion Vascular compliance is maximum within the normal pressure range, and changes in collagen fiber classification and elastic fiber distribution along the CCA play an important role in changing and maintaining vascular compliance.
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Original research was done by Li Xuemin, Pan Tianyue, Wang Lu, Guan Guoping, Wang Keqiang, Yang Lin, Zhang Hongqi
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