EVERTING STENT AND STENT DELIVERY SYSTEM
First Claim
1. A delivery device for delivering a medical device having a tubular body, the device comprising:
- a delivery shaft having a distal region, a proximal region, and a lumen extending through at least the delivery shaft distal region; and
an elongate release member having a proximal region, a distal region, and a distal end, said elongate release member distal region being disposed within the delivery shaft distal region lumen and cooperatively dimensioned to releasably secure an end section of the medical device between the release member distal region and the delivery shaft distal region, such that longitudinal movement of the release member disengages the release member distal region from the end section of the medical device and frees the medical device from the delivery shaft.
3 Assignments
0 Petitions
Accused Products
Abstract
Devices and methods for delivering stents to target vessel regions, including stent delivery through microcatheters to narrow cerebral arteries. One stent delivery device includes a stent having the distal region everted over the distal end of a delivery tube, having the everted stent distal end captured by a distal element of a elongate release member disposed through the delivery tube. The delivery tube can have a distal taper to a small profile distal end. The everted stent distal region can be captured between the release member distal element and the surrounding delivery tube distal region walls. The captured and everted stent can be distally advanced to a target site, followed by manipulating the release member to free the captured stent. Some devices utilize distal advancement of the release member while other devices use proximal retraction of the release member to free the captured stent distal end. Once released, the stent is free to self-expand or be expanded against the surrounding blockage and/or vessel walls. In some methods, a guide catheter or microcatheter is also included and disposed about the everted and captured stent to advance the stent, delivery tube, and release member to a location near the site to be stented. The devices and methods provide stent delivery not requiring an enclosing delivery sheath about the stent. The everted stent can thus have a very small distal profile enabling small diameter vessels to be crossed and treated.
50 Citations
12 Claims
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1. A delivery device for delivering a medical device having a tubular body, the device comprising:
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a delivery shaft having a distal region, a proximal region, and a lumen extending through at least the delivery shaft distal region; and an elongate release member having a proximal region, a distal region, and a distal end, said elongate release member distal region being disposed within the delivery shaft distal region lumen and cooperatively dimensioned to releasably secure an end section of the medical device between the release member distal region and the delivery shaft distal region, such that longitudinal movement of the release member disengages the release member distal region from the end section of the medical device and frees the medical device from the delivery shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification