| 摘要 |
An improved non-whip angiographic catheter Fig 6 has a preselected number of openings (42,44,46,48,52) of preselected size, location and orientation along the straight portion 20 of the catheter near the distal tip 40 so as to distribute the force of the high-pressure dye injection jets while maintaining the non-whip characteristics. At least one opening 42 in the catheter long portion 20 is provided facing the open end 38 of the tip portion so that the dye trajectories from the catheter tip opening 38 and the catheter long portion opening 42 are generally coplanar and perpendicular so as to interfere with each other for improved dye dispersion. At least two reaction openings 46,48 of predetermined size are provided on the opposite side of the catheter long portion 20 at preselected locations, the dye trajectories of these three reaction openings also being generally coplanar with the trajectories of the first opening and the open end of the catheter tip. The special openings have sufficiently small diameters and are specially staggered so as to reduce the possibility of kinking the catheter during placement of the catheter into position for diagnostic angiography. |
