Device for Filtering of Blood During Removal of Heart Valve Stenosis and Method of Removing Heart Valve Stenosis
First Claim
1. A device for the filtering of blood during removal of a heart valve stenosis comprising:
- a filter catheter including a catheter lumen and at its distal end, for filtering the blood to be found downstream behind a heart valve, a filter which moves distally into and out of the filter catheter, wherein the filter is designed to expand radially to an extended state in which the filter fits up against a blood vessel wall, anda balloon catheter which is guided through the catheter lumen of the filter catheter from a proximal end to the distal end, wherein the balloon catheter includes at its distal end a balloon for removal of a heart valve stenosis,andwherein the catheter lumen has a diameter of approximately 4 to 7 millimeters (mm).
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Abstract
The invention relates to a device and a method for the removal of a heart valve stenosis, in which a filter catheter is arranged in a vessel section located downstream of the heart valve, and a valvuplasty catheter is arranged in the area of the heart valve. The filter catheter has in one embodiment of the invention at its distal end a radial filter which is unfolded radially until it fits up against the vessel wall. The catheter lumen is closed in such a way that blood must flow through the filter. After the filter has been unfolded, the valvuplasty catheter is inflated in the area of the heart valve to remove the heart valve stenosis, while debris and plaque which are released are collected in the filter. In an alternative membrane, the filter catheter may be sealed relative to the vessel wall by means of a sealing element, while an external filter is connected to the filter catheter to filter debris and plaque from the blood.
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Citations
20 Claims
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1. A device for the filtering of blood during removal of a heart valve stenosis comprising:
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a filter catheter including a catheter lumen and at its distal end, for filtering the blood to be found downstream behind a heart valve, a filter which moves distally into and out of the filter catheter, wherein the filter is designed to expand radially to an extended state in which the filter fits up against a blood vessel wall, and a balloon catheter which is guided through the catheter lumen of the filter catheter from a proximal end to the distal end, wherein the balloon catheter includes at its distal end a balloon for removal of a heart valve stenosis, and wherein the catheter lumen has a diameter of approximately 4 to 7 millimeters (mm). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device according to claim 9, wherein the seal unit has an inflatable sealing element.
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10. A device for the filtering of blood during removal of a heart valve stenosis comprising:
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a filter catheter including a catheter lumen and at its distal end, for filtering the blood to be found downstream behind a heart valve, a filter which moves distally into and out of the filter catheter, wherein the filter is designed to expand radially to an extended state in which the filter fits up against a blood vessel wall, and a balloon catheter which is guided through the catheter lumen of the filter catheter from a proximal end to the distal end, wherein the balloon catheter includes at its distal end a balloon for removal of a heart valve stenosis, and wherein the filter catheter has a greater circumference at a distal end section, in which the filter is stored, than over the rest of its length, the diameter of the catheter lumen being constant over a length of the filter catheter. - View Dependent Claims (11, 12)
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13. A method of removing a heart valve stenosis, comprising:
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inserting and then positioning a filter catheter in a vessel section downstream of a heart valve and against the direction of flow of the blood, wherein the filter catheter has at its distal end a radial filter; radially unfolding the radial filter to fit against the vessel wall and close the catheter lumen to direct blood through the filter; inserting and positioning a balloon catheter in the area of the heart valve through an open catheter lumen of the filter catheter; and after the unfolding of the filter, inflating a balloon of the balloon catheter in an area of the heart valve to remove the heart valve stenosis, while collecting released debris and plaque with the filter. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification