那种患者不适合经桡动脉入路
• In patients with long arms or upper body, standard catheters not even reach to the level of the renal arteries.
• should be equipped with long introducer sheaths (up to 110 cm) and long-shaft balloons and stents. Currently, the shaft length for balloons is limited to 150 cm and for the stents to 135 cm
长臂患者或长上半身患者，标准导管甚至不能达到肾动脉水平；应配备长导管鞘（110cm）和长杆的球囊导管或支架。目前球囊导管长度限制在150cm，支架导管最长135cm
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