| 摘要 |
<p>This invention is a microballoon (108) tipped catheter (100). The catheter has a shaft (104) which is of varying flexibility with the most flexible portion towards the distal tip. The balloon is of an elastic material. The catheter shaft has a main lumen (114) extending from the proximal end to the distal end so to allow the use of a guidewire (101) in placing the catheter's distal tip in remote regions. The catheter shaft has a wall that desirably is of multilayered construction. The wall preferably includes an independent lumen (110) which may be formed from a small diameter tubing that is placed between layers of the wall, for the inflation and deflation of the microballoon. The inflation lumen proceeds from the proximal end of the catheter and terminates near the distal end of the catheter but within the microballoon.</p> |
