Balloon device for use at distal end of catheter and for applying before replacement of native aortic valve of heart of patient, has first circular cylindrical area with first diameter and second cylindrical area provided at first area

摘要

The balloon device (13) has a first circular cylindrical area (A) with a first diameter and a second circular-cylindrical area (C) provided at the first area adjacent to the pressing of a native heart valve against an inner wall of an aorta. The second area is provided with a second diameter, which is smaller than the first diameter. A third circular-cylindrical area (D) is provided with a third diameter, which is greater than the second diameter. The third area is placed in the aorta.