Thrombus extraction system
First Claim
1. A catheter system comprising:
- an outer flexible tube having proximal and distal ends and a central lumen extending therethrough; and
an inner flexible tube having proximal and distal ends and a central lumen extending therethrough, said inner flexible tube having an open distal tip which assumes an expanded configuration when unconstrained and being reciprocatably disposed in the central lumen of the outer flexible tube, wherein the length of the inner flexible tube is sufficient to extend beyond the proximal end of the central lumen in the outer flexible tube even when the open distal tip extends beyond the distal end of the outer flexible tube, whereby the tip is expended when extended beyond the distal end of the outer tube and collapsed when drawn within the distal end of the outer tube.
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Accused Products
Abstract
A vascular catheter system comprises an outer flexible tube, an inner flexible tube disposed in the lumen of the outer flexible tube, and an expandable body mounted at the distal end of the third flexible tube disposed in the lumen of the inner flexible tube. The catheter system is suitable for percutaneous introduction to a blood vessel where the distal end may be located proximate a region of clot or thrombus. By extending the expandable body through the region of clot or thrombus, the obstructing material may be dislodged from the blood vessel wall and drawn toward the open distal end of the inner tube. The inner tube includes an expandable tip which will open to extend substantially across the blood vessel. In this way, the expandable tip will be positioned to collect all of the dislodged clot and thrombus. By withdrawing both the inner tube and the expandable body back into the outer flexible tube, the catheter system may be withdrawn from the patient without appreciable loss of the clot or thrombus.
1408 Citations
18 Claims
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1. A catheter system comprising:
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an outer flexible tube having proximal and distal ends and a central lumen extending therethrough; and an inner flexible tube having proximal and distal ends and a central lumen extending therethrough, said inner flexible tube having an open distal tip which assumes an expanded configuration when unconstrained and being reciprocatably disposed in the central lumen of the outer flexible tube, wherein the length of the inner flexible tube is sufficient to extend beyond the proximal end of the central lumen in the outer flexible tube even when the open distal tip extends beyond the distal end of the outer flexible tube, whereby the tip is expended when extended beyond the distal end of the outer tube and collapsed when drawn within the distal end of the outer tube. - View Dependent Claims (2)
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3. A catheter system comprising:
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an outer flexible tube having proximal and distal ends and a central lumen extending therethrough; an inner flexible tube having proximal and distal ends and a central lumen extending therethrough, said inner flexible tube having an open distal tip which assumes an expanded configuration when unconstrained and being reciprocatably disposed in the central lumen of the outer flexible tube, whereby the tip is expanded when extended beyond the distal end of the outer tube and collapsed when drawn within the distal end of the outer tube; and an inflatable balloon at a distal end of a flexible inflation tube disposed within the central lumen of the inner flexible tube for drawing clot or thrombus into the tip of the inner flexible tube while said tip is in its expanded configuration. - View Dependent Claims (4, 5)
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6. A catheter system comprising:
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an outer flexible tube having proximal and distal ends and a central lumen extending therethrough; an inner flexible tube having proximal and distal ends and a central lumen extending therethrough, said inner flexible tube having an open distal tip which assumes an expanded configuration when unconstrained and being reciprocatingly disposed in the central lumen of the outer flexible tube, whereby the tip is expended when extended beyond the distal end of the outer tube and collapsed when drawn within the distal end of the outer tube; and an expandable coil secured to a distal end of a third flexible tube disposed within the central lumen of the inner flexible tube for drawing clot or thrombus into the tip of the inner flexible tube while said tip is in its expanded configuration.
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7. A catheter system comprising:
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an inner flexible tube having proximal and distal ends and a central lumen extending therethrough; means mounted on the distal end of said inner flexible tube for capturing and securing thrombus material therein; and means comprising an expandable body mounted on a third tube reciprocatably disposed within the central lumen of the inner flexible tube, said expandable body being disposed at the distal end of said inner flexible tube for drawing clot or thrombotic material from a blood vessel into the means for capturing and securing, whereby clot and thrombotic material can be removed by drawing said material into the mans for capturing and securing and withdrawing said inner flexible tube from the blood vessel. - View Dependent Claims (8, 9, 10)
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11. A catheter system comprising:
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an inner flexible tube having proximal and distal ends; an outer flexible tube circumscribing the inner flexible tube having proximal and distal ends; means mounted on the distal end of said inner flexible tube for capturing and securing thrombus material therein; and an expandable coil mounted at the distal end of a third flexible tube for drawing clot or thrombus into the means for capturing and securing, said third flexible tube being reciprocatingly disposed within a central lumen of the inner flexible tube.
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12. A method for removing clot or thrombus from a blood vessel, said method comprising:
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percutaneously introducing a catheter having an open distal end into the blood vessel so that said distal end of the catheter is located proximate the region of clot or thrombus; extending an expandable body from the distal end of the catheter through the region of clot or thrombus; expanding the expandable body so that its periphery contacts the inside wall of the blood vessel; expanding the open distal end of the catheter; and drawing the expandable body in its expanded configuration back to the expanded distal end of the catheter, whereby the thrombus is translated back to said distal end; and capturing the thrombus in the distal end of the catheter. - View Dependent Claims (13, 14, 15, 16)
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17. A method for removing clots or thrombus from a blood vessel, said method comprising:
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percutaneously introducing a catheter having an open distal end into the blood vessel so that said distal end of the catheter is located proximate the region of clot or thrombus; extending an expandable body from the distal end of the catheter through the region of clot or thrombus; expanding the expandable body so that its periphery contacts the inside wall of the blood vessel; expanding the distal end of the catheter to facilitate capture of the clot or thrombus; drawing the expandable body in its expanded configuration back to the expanded distal end of the catheter, whereby said thrombus is translated back to said distal end; and simultaneously collapsing said expandable body and expandable distal end into an outer flexible tube to facilitate removal of the catheter with the clot or thrombus. - View Dependent Claims (18)
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Specification