S-shaped versus conventional straight skin incision: Impact on primary functional maturation, stenosis and thrombosis of autogenous radiocephalic arteriovenous fistula: Impact of incision on maturation, stenosis & failure of RCAVF. Study design: Prospective observational comparative

S形切口与传统直线切口：对自体桡动脉-头静脉动静脉瘘（RCAVF）原发性功能成熟、狭窄和血栓形成的影响：切口对RCAVF成熟、狭窄和失败的影响。研究设计：前瞻性观察性比较研究。