High torque steerable dilatation catheter
First Claim
1. A steerable balloon dilatation catheter suitable for angioplasty procedures, comprising:
- (a) a thin-walled tubular outer member formed of plastic material having an inner lumen extending therethrough;
(b) a tubular inner member disposed within the inner lumen of the outer tubular member and having an inner lumen extending therethrough with an axial opening at the distal tip thereof with a distal tubular portion of the inner tubular member having a thin wall and being formed of high strength plastic material providing longitudinal flexibility and diametric rigidity and a proximal tubular portion being formed of hypotubing to provide improved pushability;
(c) an inflatable, relatively inelastic balloon member on the distal portion of the catheter assembly with the proximal end of the balloon member being sealingly secured to the distal end of the outer tubular member, the distal end of the balloon member being sealingly secured to the distal end of the inner member and the interior of the balloon member being in fluid communication with an annular lumen disposed between the inner and outer tubular members; and
(d) an elongated core member disposed within the inner lumen of the inner tubular member with a distal portion thereof extending out of the axial opening in the distal tip thereof and having a flexible body disposed therearound, said core member being axially rotatable within the inner lumen of the inner member but fixed to prevent significant longitudinal movement of the core member within said inner lumen.
1 Assignment
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Accused Products
Abstract
A steerable dilatation catheter which is particularly adapted for angioplasty procedures having a concentric construction of thin-walled inner and outer tubular members of high strength plastic, such as polyimide, which provide diametric rigidity but longitudinal flexibility. At least the distal portion of the inner and outer tubular members which will extend out of the guiding catheter during angioplasty procedures have wall thicknesses of less than 0.002 inch, preferably less than 0.0015 inch. An elongated core member is adapted to freely rotate within the inner tubular member but is prevented from any significant axial movement therein.
261 Citations
19 Claims
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1. A steerable balloon dilatation catheter suitable for angioplasty procedures, comprising:
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(a) a thin-walled tubular outer member formed of plastic material having an inner lumen extending therethrough; (b) a tubular inner member disposed within the inner lumen of the outer tubular member and having an inner lumen extending therethrough with an axial opening at the distal tip thereof with a distal tubular portion of the inner tubular member having a thin wall and being formed of high strength plastic material providing longitudinal flexibility and diametric rigidity and a proximal tubular portion being formed of hypotubing to provide improved pushability; (c) an inflatable, relatively inelastic balloon member on the distal portion of the catheter assembly with the proximal end of the balloon member being sealingly secured to the distal end of the outer tubular member, the distal end of the balloon member being sealingly secured to the distal end of the inner member and the interior of the balloon member being in fluid communication with an annular lumen disposed between the inner and outer tubular members; and (d) an elongated core member disposed within the inner lumen of the inner tubular member with a distal portion thereof extending out of the axial opening in the distal tip thereof and having a flexible body disposed therearound, said core member being axially rotatable within the inner lumen of the inner member but fixed to prevent significant longitudinal movement of the core member within said inner lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification