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0001), operating time for vessel cutdown (p 0.0001) and wire assisted approach (p = 0.0008). Stratified by specific entry vessel, no statistical difference was found in complication rate or incidence between the silicone and polyurethane groups. We further compared the cumulative complication incidence of the silicone and polyurethane groups, and also found no statistical difference (p = 0.4451). As long as external stress forces generated by surrounding structures and focused on potential weak points are avoided, both silicone and