Stent retrieval device
First Claim
1. A stent retrieval device comprising:
- an elongate shaft including a distal region;
a tube having an exterior, a slit therethrough and an inside diameter, said tube operatively attached to said shaft distal region, means for increasing said tube inner diameter;
said means for increasing said tube inner diameter includes an inflatable sleeve attached about said tube exterior.
2 Assignments
0 Petitions
Accused Products
Abstract
A device and method for retrieving partially deployed balloon expandable stents. The device addresses, inter alia, the problem of retrieving stents that have become dislodged from the desired position about a deploying balloon, leaving a stent that is likely too large to be retracted back into a guide catheter. The device can be used with a guide catheter having a balloon angioplasty catheter inserted within. The invention includes a grasping device at the distal end of a shaft and a mechanism for opening and closing the grasping device. In one embodiment, the grasping device includes a reinforced tube having a bound outer inflatable sleeve and a longitudinal slit. In use, the tube can be slipped over the proximal portion of a balloon catheter shaft extending from a patient, advanced over the shaft, through and distally out of a guide catheter, there inflated to grasp the stent distal end, and retracted proximally into the guide catheter. In another embodiment, the grasping device includes fingers attached distally to an inner shaft and proximally to an outer shaft. The fingers open when sliding the inner shaft distally relative to the outer shaft. The fingers close when sliding the inner shaft proximally relative to the outer shaft. This embodiment can be used with a guide catheter to grasp a stent and withdraw it through the guide catheter.
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Citations
18 Claims
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1. A stent retrieval device comprising:
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an elongate shaft including a distal region; a tube having an exterior, a slit therethrough and an inside diameter, said tube operatively attached to said shaft distal region, means for increasing said tube inner diameter;
said means for increasing said tube inner diameter includes an inflatable sleeve attached about said tube exterior.
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2. A stent retrieval device comprising:
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an elongate shaft having an inflation lumen and a distal region; a tube having a slit therethrough and an inside diameter operatively attached to said shaft distal region, said tube having a wall including an inner and outer surface; an inflatable sleeve attached about said tube outer surface, said sleeve being in fluid communication with said shaft inflation lumen. - View Dependent Claims (3, 4, 5)
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6. A method for retrieving a stent comprising:
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providing a stent retrieval device including an elongate shaft having a distal region, a retrieval tube operatively attached to said shaft distal region, said retrieval tube having a slit therethrough and an inflatable sleeve attached about said tube exterior, said retrieval tube increasing in inside diameter when said inflatable sleeve is inflated; providing a patient having an elongate tube inserted intravascularly and extending proximally therefrom, having a stent positioned near the distal end of said elongate tube; advancing said retrieval tube distally into said patient through said elongate tube; advancing the distal end of said retrieval tube until the proximal end of said stent is within proximity of said retrieval tube distal end, increasing said retrieval tube inside diameter; advancing said retrieval tube over said stent; decreasing said retrieval tube inside diameter; and retracting said retrieval tube containing said stent proximally. - View Dependent Claims (7, 8)
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9. A stent retrieval device comprising:
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a first elongate shaft having a longitudinal axis and a distal region; a second elongate shaft having a longitudinal axis and a distal region; said first and second shaft being slidable relative to one another; and a grasping device attached to said first and second shaft distal regions, having an effective inner diameter and a means for reducing said effective inner diameter, said grasping device including a plurality of diverging fingers. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for retrieving a stent comprising:
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providing a stent retrieval device including a first elongate shaft having a distal region, a second elongate shaft having a distal region, said second shaft being hollow and said first shaft lying within said second shaft, and a grasping device, having a proximal region and a distal region, attached to said first and second shaft distal regions, said grasping device including a plurality of diverging fingers; providing a patient having an elongate tube inserted intravascularly and extending proximally therefrom, having a stent positioned near the distal end of said elongate tube; advancing said grasping device distally into said patient through said elongate tube; advancing said grasping device past the distal end of said elongate tube; advancing said grasping device over the proximal end of said stent; closing said grasping device over said stent; withdrawing said grasping device within said elongate tube; and withdrawing said grasping device containing said stent proximally. - View Dependent Claims (17, 18)
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Specification