DIRECT VISUALIZATION DEVICES, SYSTEMS, AND METHODS FOR TRANSSEPTAL CROSSING

A direct visualization catheter (100) adapted for transseptal crossing includes at least an outer member (110), and inner member (120), a transparent balloon member (130), and an imaging element (140). The outer member (110) includes a tubular body extending from a proximal end to a distal end and defines a first lumen there through. The inner member (120) is slidably disposed within the first lumen of the outer member and includes an elongate body with a distal end. The transparent balloon member (130) is coupled between the distal end of the outer member (110) and the distal end of the innermember (120) such that the shape of the transparent balloon member (130) is adjusted by sliding the inner member (120) and the outer member (110) relative to each other. The imaging element (140) isdisposed within the balloon member (130). 适于跨室间隔穿越的直接可视化导管(100)包括至少个外部构件(110)和内部构件(120)、透明球囊构件(130)和成像元件(140)。外部构件(110)包括从近端延伸到远端的管状主体且限定穿过其中的第内腔。内部构件(120)可滑动地设置在外部构件的第内腔内且包括具有远端的细长主体。透明球囊构件(130)连接在外部构件(110)的远端和内部构件(120)的远端之间，