Xicheng Zhang, Guanqiang Li, Bo Hu, Xianchen Huang, Yuan Sun
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引用次数: 0
Abstract
Objective: To establish a large animal model of deep venous thrombosis (DVT) secondary to chronic iliac vein stenosis (IVS) that can simulate pathophysiologic processes in humans.
Methods: Iliac vein stenosis models with degrees of stenosis of approximately 30%, 50%, 70%, and 90% were developed in 4 groups of 12 adult goats using a novel controllable ligation technique. Four weeks later, the stenotic lesion was evaluated by digital subtraction angiography (DSA) and optical coherence tomography (OCT), after which iliac vein thrombosis adjacent to the stenosis was induced by balloon blockade combined with thrombin injection. Three days after thrombosis, the process of clinical thrombus clearance was simulated by a rheolytic thrombectomy catheter, and the IVS was corrected by balloon angioplasty and stent implantation.
Results: After controllable ligation, venography revealed iliac vein stenosis degrees of 31.39±3.09%, 48.95±1.24%, 71.34±5.12%, and 89.78±4.66% in the four groups. After 4 weeks, DSA and OCT showed obvious collateral circulation and intimal hyperplasia around stenotic lesions in Group 3, which was consistent with the secondary pathological changes in IVS in humans. The iliac veins in Groups 1 and 2 remained patent without obvious collateral circulation, while Group 4 showed complete iliac vein occlusion with extensive collaterals. Thrombosis was successfully induced in Groups 1 and 2, but Groups 3 and 4 required repeated thrombin injections and a shortened distance between the two balloons. Clinical thrombus-clearing devices removed most thrombi, and residual stenosis was corrected by balloon angioplasty and stent implantation. OCT confirmed optimal stent apposition.
Conclusion: This study developed a caprine model of IVS-related thrombosis, which can facilitate research on the IVS-DVT relationship and the evaluation of thrombectomy devices and specialized stents for IVS.
期刊介绍:
Annals of Vascular Surgery, published eight times a year, invites original manuscripts reporting clinical and experimental work in vascular surgery for peer review. Articles may be submitted for the following sections of the journal:
Clinical Research (reports of clinical series, new drug or medical device trials)
Basic Science Research (new investigations, experimental work)
Case Reports (reports on a limited series of patients)
General Reviews (scholarly review of the existing literature on a relevant topic)
Developments in Endovascular and Endoscopic Surgery
Selected Techniques (technical maneuvers)
Historical Notes (interesting vignettes from the early days of vascular surgery)
Editorials/Correspondence