| 主权项 |
1. A transseptal delivery system for a heart, comprising:
an elongate first tubular member defining a first lumen extending between a proximal end and a distal end of the first tubular member, the first tubular member having an adjustable portion adjacent its distal end; and an elongate second tubular member receivable within the first tubular member, the second tubular member defining a lumen extending between a proximal end and a distal end of the second tubular member, the lumen adapted to receive a puncturing tool and an instrument to be placed in the heart, the second tubular member having a curved portion adjacent its distal end in a relaxed state; wherein, with the first tubular member extending through a superior entry point into a right atrium of the heart, the adjustable portion of the first tubular member is deflectable toward an atrial septum of the heart thereby providing an outlet at its distal end to i) guide the puncturing tool toward the atrial septum for creating a septal puncture, and ii) guide insertion of the second tubular member through the septal puncture into a left atrium of the heart; wherein, with the first tubular member remaining in the right atrium and with the second tubular member extending through the septal puncture into the left atrium, the curved portion of the second tubular member is oriented toward a left ventricle of the heart thereby providing an outlet at its distal end to guide insertion of a guide extending through the first and the second tubular members into the left ventricle; wherein, with the first tubular member remaining in the right atrium, the outlet of the first tubular member supports advancement of the second tubular member along the guide into the left ventricle; and wherein, with the first tubular member remaining in the right atrium and the second tubular member extending into the left ventricle, the lumen of the second tubular member provides a passage for advancing the instrument into the left ventricle. |
