Embolectomy catheter
First Claim
Patent Images
1. A clot removal system for removing plaque, thrombi, emboli, and other clots from a blood vessel, comprising:
- a catheter having an outer surface and a distal end, the catheter being configured for insertion into the vessel with the distal end extending beyond the clot;
an elastomeric non-woven foam tip attached to the outer surface of the catheter at the distal end, the foam tip having generally elastic deformation characteristics for minimizing abrasive shear forces against the inner lining of said vessel, and being moveable between a contracted state and an expanded state;
catheter tip actuation means for moving the foam tip between the contracted state and the expanded state;
wherebythe catheter can be inserted with the foam tip in the contracted state, the foam tip can be moved to the expanded state to engage the clot, and the catheter can be removed from the vessel with the foam tip in the expanded state to withdraw the clot from the vessel.
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Abstract
An improved embolectomy catheter, includes a catheter body, an elastomeric foam catheter tip attached at one end of the catheter body, and actuator means for elastically deforming the catheter tip. The catheter tip deforms longitudinally and radially in response to activation of the actuation means. The catheter tip may be formed of any type of sterile elastomeric foam, which may be easily compressed and restored to its original shape upon decompression.
90 Citations
19 Claims
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1. A clot removal system for removing plaque, thrombi, emboli, and other clots from a blood vessel, comprising:
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a catheter having an outer surface and a distal end, the catheter being configured for insertion into the vessel with the distal end extending beyond the clot; an elastomeric non-woven foam tip attached to the outer surface of the catheter at the distal end, the foam tip having generally elastic deformation characteristics for minimizing abrasive shear forces against the inner lining of said vessel, and being moveable between a contracted state and an expanded state; catheter tip actuation means for moving the foam tip between the contracted state and the expanded state;
wherebythe catheter can be inserted with the foam tip in the contracted state, the foam tip can be moved to the expanded state to engage the clot, and the catheter can be removed from the vessel with the foam tip in the expanded state to withdraw the clot from the vessel. - View Dependent Claims (2, 3, 4, 5)
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6. A clot removal system for removing plaque thrombi, emboli, and other clots from a blood vessel, comprising:
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a catheter having an elongate configuration and extending between a proximal end and an opposing distal end, the catheter being configured for insertion into the vessel with the distal end extending beyond the clot; a tube forming a wall of the catheter and defining a lumen of the catheter; a compression member disposed coaxially of the tube; an elastomeric, non-woven foam tip disposed at the distal end of the catheter and being fabricated to minimize abrasive shear forces against the inner lining of said vessel, said tip being fixed to one of the tube and the compression member; means for moving one of the tube and the compression member relative to the other of the tube and the compression member to expand the foam tip outwardly against the vessel;
wherebythe catheter can be removed from the vessel with the tip in the expanded state to withdraw the clot from the vessel. - View Dependent Claims (7, 8, 9, 10, 11)
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12. An occlusion catheter adapted to at least partially occlude a blood vessel, comprising:
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a catheter having an elongate configuration and extending between a proximal end and an opposing distal end of the catheter; a tube having an axis and forming a wall of the catheter; a compression member disposed generally coaxially of the tube; an elastomeric, non-woven foam tip disposed at the distal end of the catheter and being fabricated to minimize abrasive shear forces against the inner lining of said vessel, said tip being fixed to one of the tube and compression member at the distal end of the catheter; and means for moving the tube relative to the compression member to expand the foam tip radially outwardly to at least partially occlude the vessel. - View Dependent Claims (13, 14, 15)
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16. A clot removal system for removing plaque, thrombi, emboli and other clots from a blood vessel, comprising:
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a catheter body having at least one lumen extending between a first end and second end of the catheter body; a stylet disposed in the lumen of the catheter body and having a distal end disposed at the first end of the catheter body and a proximal end disposed at the second end of the catheter body; an elastomeric non-woven foam tip disposed at the first end of the catheter body distally of the stylet and being fabricated to minimize abrasive shear forces against the inner lining of said vessel, the foam tip having a low profile state and a high profile state; the foam tip in the low profile state being disposed in the lumen of the catheter body; and the stylet being operable at the proximal end to move the foam tip to the high profile state. - View Dependent Claims (17, 18, 19)
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Specification