Linear eversion catheter with reinforced inner body extension
First Claim
Patent Images
1. A catheter comprising:
- an elongated catheter body having a lumen with a distal opening;
an elongated inner tube having a flexible distal end portion and an inner tube lumen extending through the distal end portion of the inner tube, said inner tube being movable longitudinally in said lumen;
a flexible everting element coupled to the catheter body and to the inner tube so that the everting element can be everted through the distal opening;
said distal end portion of the inner tube including a flexible tubular layer and a flexible reinforcing layer which reinforces at least a region of the tubular layer and inhibits radial collapse of the inner tube lumen in at least a region of the distal end portion of the inner tube; and
the reinforcing layer including at least one elongated element which extends circumferentially of the tubular layer.
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Accused Products
Abstract
A catheter comprising an elongated catheter body having a lumen with a distal opening, an elongated inner tube having a flexible distal end portion and a flexible everting element coupled to the catheter body and the inner tube so that the everting element can be inverted and everted to the distal opening. The inner tube has an inner tube lumen which extends through the distal end portion of the inner tube. The distal end portion of the inner tube includes a flexible tubular layer and a flexible reinforcing layer which reinforces the tubular layer and inhibits radial collapse of the inner tube lumen in the distal end portion of the inner tube.
190 Citations
21 Claims
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1. A catheter comprising:
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an elongated catheter body having a lumen with a distal opening; an elongated inner tube having a flexible distal end portion and an inner tube lumen extending through the distal end portion of the inner tube, said inner tube being movable longitudinally in said lumen; a flexible everting element coupled to the catheter body and to the inner tube so that the everting element can be everted through the distal opening; said distal end portion of the inner tube including a flexible tubular layer and a flexible reinforcing layer which reinforces at least a region of the tubular layer and inhibits radial collapse of the inner tube lumen in at least a region of the distal end portion of the inner tube; and the reinforcing layer including at least one elongated element which extends circumferentially of the tubular layer. - View Dependent Claims (2, 3, 6, 7, 8)
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4. A catheter as defined in claim wherein the reinforcing layer reinforces substantially the entire length of the distal end portion of the inner tube.
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5. A catheter as defined in claim wherein the reinforcing layer includes a coil spring.
- 9. A catheter as defined in claim wherein the everting element can be inverted within the lumen of the catheter body and the catheter includes engageable stops to limit the movement of the inner tube proximally in the lumen of the catheter body so that the inner tube cannot be moved proximally sufficiently to rupture the everting element.
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11. A catheter comprising:
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an elongated catheter body having a lumen with a distal opening; an elongated inner tube having a flexible distal end portion and an inner tube lumen extending through the distal end portion of the inner tube, said inner tube being movable longitudinally in said lumen; a flexible everting element coupled to the catheter body and to the inner tube so that the everting element can be everted through the distal opening; and said distal end portion of the inner tube including a flexible inner tubular layer and a coil spring receiving the inner tubular layer. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A catheter comprising:
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an elongated catheter body having a lumen with a distal opening; an elongated inner tube having a flexible distal end portion and an inner tube lumen extending through the distal end portion of the inner tube, said inner tube being movable longitudinally in said lumen; a flexible everting element coupled to the catheter body and to the inner tube so that the everting element can be everted through the distal opening to a fully everted position in which at least a major length of said distal end portion extends distally of said distal opening; and said distal end portion of the inner tube including a flexible tubular layer and a flexible reinforcing layer which reinforces the tubular layer adjacent the distal opening in said fully everted position and inhibits radial collapse of the inner tube lumen adjacent the distal opening in said fully everted position. - View Dependent Claims (19, 20, 21)
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Specification