Determinants of successful synthetic hemodialysis vascular access graft placement

Hemodirilysis access to the circi~l;ition is tha bar;[ pl-ovided by nativeand synthetic arterio-vcnous fistula, but vascula~ access carries a tlighn~orbiclity ;\ltd c.oi~~plic;itioi~s.A l a y e numbcr of chronic renal f’ai1~11.t: wc1.c not suitable for3 c o ~ i s t r ~ ~ ~ol fi o ~nait ive fistula :;o rhcy 1-ecll~irccla nother choice accessconfigul-ation as bsidgc fisttlla.Theie are l1luItipIe factors which determine tke creation of successfulA-V glaft such as good vein ( patent not less than 4 mm ), good artery ( noarteriosclerosis ), no proxin~alo bstruction and normal blood pressure.In this study, tbe synthetic grafts were foIIowed up for 6 months withstress on factors affecting survival of these grafts and their complications.These factors included patient demographics (age and sex), historyof previous access, history of diabetes lnellitiis and hypertension, shape andtype of graft, angle and diameter of anastornosis .and use of heparinpostoperative.’rOld age and history of two failed fistulas were only two factors thatwere statically significant that there were Inore complications with themwhile other factors were statically insignificant.IThe’patency rate of PTFE grafts either primary and secondary are Ijess ,than that of native fistula. PTFE grafts are composed of foreign material, so subjected to a high risk of thrombotic and infectiousL.