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Objective To compare the patency rate of percutaneous balloon angioplasty or stenting for restenosis of femoral-popliteal artery artificial vascular grafting.Method 78 cases of femoral-popliteal artery artificial vascular graft postoperative occlusion patients were divided into 2 groups:anastomotic balloon angioplasty group (36 cases) and stent angioplasty group (42 cases) after double-lumen catheter embolectomy.Patients in anastomotic balloon dilatation group were given balloon angioplasty only becaus fine narrow flow signals were seen in angiography.Patients in stenting group received balloon angioplasty followed by suitable caliber self-expanding stent placement.Patency rates were compared between the two groups after 12,36 months of interventional treatment.Results The patency rate in stenting group was higher than that of percutaneous balloon angioplasty group (x2 =7.422,P ＜ 0.05).Conclusions Balloon stenting angioplasty had advantages of high patency rate over balloon dilatation for the treatment of postoperative occlusion of femoral-popliteal artery grafting.
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Objective To evaluate short and medium term therapeutic effects of VIABAHN-covered stent in treat-ment of arteriosclerosis obliterans in lower extremity. Methods Among all 53 cases of arteriosclerosis obliterans in lower extremity with C/D TASC levels, 22 patients underwent VIABAHN-covered stent (stent group), while the other 31 patients were treated with femoral-popliteal artery bypass grafting surgery (graft group). The arterial patency rates were analyzed 3 and 6 months after the two different surgeries. Results The number of arterial patency cases were 28 (90.3%) at 3 months and 26 (83.9%) at 6 months in stent group while it is 22 (100%) at 3 months and 21 (95.5%) at 6 months in graft group. There were no significant differences in the arterial patency rate at 3 months and 6 months between the two different surger-ies (χ2 is 0.808 and 0.760 respectively, P>0.05). Conclusion VIABAHN-covered stent can be used as the preferred treat-ment for arteriosclerosis obliterans of lower extremity.
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Objective To distinguish residual tumor from inflammation after radiofrequency ablation (RA) for hepatic VX2 carcinoma in rabbits according to the comparative study between CT and pathological findings.Methods CT and pathologic examination were performed in different stages of RFA for rabbits hepatic VX2 models,and their different performances were observed.Results Marginal enhancement band was showed with enhanced CT of both residual tumor and inflammation.Moreover,liver tissues peripheral to enhancement band were in gradual weaken pattern.The enhancement band of inflammation was most obvious on the 2~(nd) day after RFA,but weakened gradually and disappeared two weeks later.Conclusion The residual tumor and inflammation could not be distinguished through enhanced CT scanning within 1 week after RFA.Low intensity lesions with peripheral enhancement 2 weeks after RFA should be recognized as residual tumor.