| 摘要 |
<p>A balloon catheter having a proximal end and a distal end for medically treating a patient is discussed. The catheter comprises a hypotube having a proximal tubular portion, an intermediate tubular portion having a longitudinal indentation, and a distal portion. The catheter also comprises an inner and an outer tubular body. The inner tubular body has a proximal and distal end, and defines a proximal and distal guidewire port at each end respectively, and a guidewire lumen extends between the guidewire ports. The outer tubular body surrounds at least a portion of the inner tubular body. The proximal ends of the inner and outer tubular bodies are affixed together and sealed to the hypotube at a point defined at or near a transition between the intermediate and distal portions of the hypotube. A balloon is affixed to the inner and outer tubular bodies at or near their distal ends <??>An inflation lumen extends from the hypotube proximal end, through the hypotube proximal and intermediate tubular portions, and through an annular space between the outer and inner tubular bodies, into an interior of the balloon. The distal portion of the hypotube extends a distance into the outer tubular body. This provides a transition in flexibility between the tubular portions of the hypotube to the inner and outer bodies; and the balloon catheter thus has a rapid-exchange configuration. <IMAGE></p> |
