| 摘要 |
A needleless transseptal device assembly, and associated methods, for accessing the left atrium of a human heart includes a tubular body sized to navigate vasculature, and a dilator having a proximal end and a distal end. The dilator is substantially housed and axially movable within the tubular body. The assembly further includes a guidewire that is substantially housed and axially movable within the dilator. The guidewire includes a flexible proximal section and a flexible distal section, and the flexible distal section has a distal end with rotatable, septal tissue cutting elements. The distal end may be configured with a blunt shape. Further, the tubular body and the dilator may be arranged in a steerable configuration. A torquing member may also be coupled to the proximal section of the guidewire to assist in the rotational movement of the septal tissue cutting elements. |
