Perfusion shunt device and method
First Claim
1. A perfusion shunt device comprising:
- a flexible conduit structure having a proximal end, a distal end, and a blood perfusion path extending axially over at least a portion of the conduit structure;
a proximal shaft structure extending proximally from the conduit structure; and
means attached to the conduit structure for securing the conduit structure to a catheter at locations proximal of and distal to an expansible balloon on the catheter, wherein the flexible conduit structure is not directly secured over the balloon.
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Accused Products
Abstract
A perfusion shunt device is used in conjunction with balloon catheters to provide blood perfusion across an inflated balloon in a blood vessel. The perfusion shunt device comprises a flexible conduit structure having one or more blood perfusion paths formed from a proximal end to a distal end thereof. The flexible conduit structure is usually attached directly or indirectly to a proximal shaft structure. Discrete anchors or expansible sleeves or cages are provided for locating the conduit structure over the balloon on the catheter. The flexible conduit structure will not be directly attached to the balloon, but rather will be secured at locations distal to an proximal of the balloon. In this way, constriction and distortion of the conduit structure and/or balloon resulting from balloon expansion are minimized. The device may be loaded over a conventional angioplasty balloon catheter within or outside of the blood vessel being treated, either before or after an angioplasty procedure.
186 Citations
21 Claims
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1. A perfusion shunt device comprising:
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a flexible conduit structure having a proximal end, a distal end, and a blood perfusion path extending axially over at least a portion of the conduit structure; a proximal shaft structure extending proximally from the conduit structure; and means attached to the conduit structure for securing the conduit structure to a catheter at locations proximal of and distal to an expansible balloon on the catheter, wherein the flexible conduit structure is not directly secured over the balloon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for perfusing blood past a treatment site within a blood vessel, said method comprising:
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providing a flexible conduit structure having a blood perfusion path extending axially over at least a portion thereof; positioning the flexible conduit over an expansible balloon on a vascular catheter, wherein the conduit is attached to the catheter at locations distal of an proximal to the expansible balloon but is not directly attached to the balloon; and expanding the balloon at the treatment site within the blood vessel, wherein blood flows through the perfusion path past the expanded balloon. - View Dependent Claims (18, 19, 20, 21)
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Specification