Method of removing heart valve stenosis
First Claim
1. A method of removing a heart valve stenosis, comprising:
- 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;
pushing the radial filter out of the filter catheter and radially unfolding the radial filter to fit against the vessel wall and closing a catheter lumen of the filter catheter to direct blood through the filter, the catheter lumen being closed with a valve located at a proximal end of the filter catheter;
inserting and positioning a balloon catheter in the area of the heart valve through the catheter lumen and the valve 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;
wherein 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.
60 Citations
14 Claims
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1. 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; pushing the radial filter out of the filter catheter and radially unfolding the radial filter to fit against the vessel wall and closing a catheter lumen of the filter catheter to direct blood through the filter, the catheter lumen being closed with a valve located at a proximal end of the filter catheter; inserting and positioning a balloon catheter in the area of the heart valve through the catheter lumen and the valve 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; wherein the catheter lumen has a diameter of approximately 4 to 7 millimeters (mm).
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2. 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; pushing the radial filter out of the filter catheter and radially unfolding the radial filter to fit against the vessel wall and closing a catheter lumen of the filter catheter 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 (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. 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 closing a catheter lumen of the filter catheter 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; 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; after collecting the debris and plaque in the filter, drawing the filter into the filter catheter and then removing the filter catheter; using a seal unit at the distal end of the filter catheter to seal space between the filter catheter and a blood vessel wall to direct blood to flow through the catheter lumen; before the filter is retracted into the filter catheter, inflating the seal element, and after retraction of the filter, blood is carried away through the catheter lumen of the filter catheter, after which the seal element is deflated and the filter catheter is removed.
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Specification