| 摘要 |
PROBLEM TO BE SOLVED: To further reduce a jetting pressure generated by the jetting to the technique level by applying an axial motion and a spiral motion when respective fluid particles are injected in a blood vessel. SOLUTION: A revolving body 6 is arranged in a region 5 which does not become narrower of a cannula 2, and the revolving body 6 is considered to additionally impart spiral motion, i.e., a revolving motion to respective fluid particles by the shape, to an axial motion in the axial direction in the aorta cannula 2. Then, a compensation area 7 is provided between the revolving body 6 and a narrowed injection region 4. Then, the compensation area 7 has a cross section which partially reduces, and also, transfers to the injection region 4 of which the cross section continuously reduces. In the region of an open port 3 which passes through a blood vessel wall of an approx. aorta arch 1, the aorta cannula 2 has a bent region 8. Then, in this region, the aorta cannula 2 is introduced in the aorta arch 1. Since the cross section narrowed section exists in front of the bent region 8, the revolving body 6 is provided in the flowing direction and in front of the narrowed region of the cannula 2. |
