| 摘要 |
This invention relates to steerable thru-lumen catheters and a method of using same, especially in the cardiovascular field. More particularly, this invention relates to a dilatation catheter means comprising: a first flexible tubular member comprising a spring coil body defining a lumen, said spring coil body having a flexible covering thereon, a second, smaller, tubular member having one or more lumens, at least one of which lumens is open at its distal end, said second tubular member extending through said first tubular member such that the distal end of said second tubular member extends distally to the distal end of said first tubular member, dilatation balloon means positioned concentric to the distal ends of said first and second catheter means, and control means attached to the proximal end of said dilatation catheter, the control means having at least one passageway in fluid connection with the interior of said first tubular member and/or one or more lumens of said second tubular member, the control means and the dilatation catheter being so configured that when the control means is rotated, the dilatation catheter itself rotates to cause the distal end of the dilatation catheter to rotate.
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