Thrombosis with outflow obstruction delays thrombolysis and results in chronic wall thickening of rat veins Klaus See-Tho, MD, E.John Harris, MD Journal.

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Presentation transcript:

Thrombosis with outflow obstruction delays thrombolysis and results in chronic wall thickening of rat veins Klaus See-Tho, MD, E.John Harris, MD Journal of Vascular Surgery Volume 28, Issue 1, Pages 115-123 (July 1998) DOI: 10.1016/S0741-5214(98)70206-X Copyright © 1998 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 1 A, Gross view of day 0 femoral vein ligation after skeletonization. No collateral branches are present around the area of ligation (lig) (original magnification, 25×). IEL, internal elastic lamina. B, Gross view of 28-day ligature-thrombosed (group A) vein that has grown several local neovascular channels (NVC) around the ligature (original magnification, 25×). C, Sagittal section through the same vein showing a large NVC and tightly bound silk ligature (original magnification, 25×; Ladd's Multistain). D, Close-up view of the NVC and ligature in B. The ligature is still tightly bound around the two original vein walls (original magnification, 400×; Ladd's Multistain). Journal of Vascular Surgery 1998 28, 115-123DOI: (10.1016/S0741-5214(98)70206-X) Copyright © 1998 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 2 Photomicrographs show ligature-thrombosed (group A) vein walls. A, Control vein. Note scant cellularity, single-layer intima, and thin media. B, Seven-day thrombosed vein. Note marked intimal and medial proliferation separated by the internal elastic lamina (IEL). C, A 28-day-old thrombosis. Note regression of intimal proliferation with marked fibrosis of the intima and persistently thickened and fibrocellular media (original magnification, 400×; Movat's elastin and collagen stain). Journal of Vascular Surgery 1998 28, 115-123DOI: (10.1016/S0741-5214(98)70206-X) Copyright © 1998 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 3 Photomicrograph shows sections through a 7-day thrombosed group A vein on the (A) and a 4-day thombosed group B vein (B). Note similar intimal and medial cellularity in both specimens (original magnification, 400×; hematoxylin and eosin and Ladd's Multistain). IEL, internal elastic lamina. Journal of Vascular Surgery 1998 28, 115-123DOI: (10.1016/S0741-5214(98)70206-X) Copyright © 1998 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 4 Comparison of wall thickness between groups A and B. Wall thickness peaks earlier and at a lower level in unobstructed group B veins. There is persistent chronic wall thickening of group A veins even after resumption of normal flow. Journal of Vascular Surgery 1998 28, 115-123DOI: (10.1016/S0741-5214(98)70206-X) Copyright © 1998 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 5 Comparison of thrombus quantity between groups A and B. There is extension of thrombus in group A veins up to 4 days after the initial thrombosis. Journal of Vascular Surgery 1998 28, 115-123DOI: (10.1016/S0741-5214(98)70206-X) Copyright © 1998 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions