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| Preliminary study of vascular factors in venous thrombosis associated with arteriovenous fistula of lower limbs |
| GUO Chang-xu, YUAN Yu, WEI Yao, WAN Xin, GAO Jin-mei |
| Department of Ultrasound, Tianjin Hospital, Tianjin 300211, China |
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Abstract Objective: Analysis of related factors of lower extremity venous thrombosis complicated with arteriovenous fistula by color Doppler ultrasound. Methods: We retrospectively analyzed 25 patients of lower extremity venous thrombosis complicated with arteriovenous fistula from June 2015 to December 2016, which diagnosed by ultrasound, 12 cases of male, 13 cases of female, and involved a total of 31 segmental vascular lesions. Recording the location of the venous thrombuosis with arteriovenous fistula, the number, internal diameter and RI of the neovascularization in the thrombosis of the arteriovenous fistula vascular segmental. Results: Hemodynamic changes were only existed in the vascular segment of arteriovenous fistula in 25 cases which with lower extremity venous thrombosis complicated with arteriovenous fistula. The incidence of venous thrombosis complicated with arteriovenous fistula was higher in proximal vascular, 21(21/31) segments of arteriovenous fistula with venous thrombosis exist neovascularization in the thrombosis, the number of the new vessels was 1.71±0.64, the internal diameter of the new vessels was (0.96±0.37) mm. Fourteen(14/21) segments can clearly show the peripheral arteries of the lesion. The RI of the neovascular of the arteriovenous fistula and the peripheral arterioles in the lesions were 0.49±0.07 and 0.67±0.06. There was a significant difference between them(P<0.01). The blood flow direction was from high resistance to low resistance. Ten(10/31) segments have no neovascular in the venous thrombosis complicated with arteriovenous fistula. Conclusions: The proximal extremity of the lower limb is more likely to have venous thrombosis, arteriovenous fistula is not easy to cause extensive changes in limb venous hemodynamics. Some of the new vessels are directly involved formation of the arteriovenous fistula in the lower extremity venous thrombosis.
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Received: 20 March 2017
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