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  • Title: Long-term results of PTFE trilaminate graft versus venous graft and composite graft for below-the-knee revascularization.
    Author: Mazzaccaro D, De Febis E, Settembrini AM, Tassinari L, Carmo M, Settembrini PG.
    Journal: J Cardiovasc Surg (Torino); 2014 Oct; 55(5):685-91. PubMed ID: 25008059.
    Abstract:
    AIM: We report our experience with the use of PTFE trilaminate graft Advanta SST (Atrium Maquet™) versus autologous great saphenous vein (AGSV) and composite PTFE trilaminate-vein graft for below-the-knee (BTK) revascularization. METHODS: Data of all consecutive patients who underwent either a BTK or a distal femoro-popliteal bypass from January 2004 to March 2013 using Advanta SST, AGSV or composite Advanta SST-vein graft were retrospectively reviewed and outcomes were analyzed. Kaplan-Meier method with Log-rank test was used to estimate survival, limb salvage and patency rates. Chi-square test was used to evaluate risk factors affecting outcomes. P value <0.05 was considered significant. RESULTS: Sixty-one patients (48 males, 78.7%; median age 73 years, IQR 66-80) underwent a BTK/distal revascularization for peripheral artery disease causing critical limb ischemia (52 patients, 85.2%) or disabling claudication (9 patients). Advanta SST graft was used in 17 patients (group A), AGSV in 30 (Group B) and composite Advanta-AGSV graft in the remaining 14 (group C). Patients' demographics and risk factors were similar among the three groups, being hypertension and smoke the most frequent comorbidities. When Advanta SST was employed, the median duration of intervention was significantly lower than using vein or composite grafts (212 minutes, IQR 177-257; 270 minutes, IQR 220-375, P=.02; 327.5 minutes, IQR 252.5-405, P=0.003 respectively). At 30-days, wound complications tended to be significantly higher in Group B (13.3%) and C (11.7%) than in group A (0%), P=0.02. At long term, survival, primary assisted and secondary patency rates did not differ significantly among the three groups. Limb salvage was similar as well among group A, B and C (P=0.29), being 81.2+9.7%, 89.4+5.8% and 67.7+13.5% respectively at 1 year and 81.2+9.7%, 83.4%+7.9% and 54.2%+16.2% respectively at 3 years. Primary patency rate at 1 year was significantly better for group B than for group A and C (71.2+8.6%, 49.6+12.7% and 47.6+14.1% respectively, P=0.02), but after 1 year the patency rate for group B and A was similar (55.5+10.6% and 49.6+12.7% respectively), being for group C significantly worse (19+11.8%). A history of previous or current smoke affected significantly primary patency rate in group A (RR 0.39, 95%CI 0.08-0.95, P=0.03). CONCLUSION: Long-term results of the use of Advanta SST graft for BTK/distal revascularization seems to be promising, with significant lower duration of the operation and wound complications. At long term, survival, limb salvage, primary assisted and secondary patency rates did not differ significantly among the three groups. The AGSV still remains the best graft in terms of primary patency at 1 year, but after one year primary patency rates using the Advanta SST compare favorably to those of AGSV, while composite bypass grafts have the worst performance. These results need to be increased further.
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