Percutaneous catheter and guidewire for filtering during ablation of myocardial or vascular tissue
First Claim
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1. A method for necrotic ablation of ectopic foci, comprising steps of:
- providing a catheter having a proximal end, a distal end, a necrotizing ablation instrument at the distal end, and a filter proximal the necrotizing ablation instrument;
inserting the catheter into a vessel;
positioning the filter;
positioning the necrotizing ablation instrument adjacent the ectopic foci;
expanding the filter; and
ablating the ectopic foci, wherein necrotic material released during ablation is captured by the filter; and
repositioning the necrotizing ablation instrument axially with respect to the expanded filter while the expanded filter remains in position.
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Abstract
An ablation catheter system for capturing and removing necrotic tissue and thrombi generated during an ablative procedure is disclosed. The catheter typically includes an elongate member, a filtration assembly disposed within the distal region, and an ablation instrument at the distal end. Alternatively, the ablation instrument is carried on the distal end of an ablation catheter, which is disposed within a lumen of the catheter system. The catheter may further include an aspiration port and lumen. Methods of using the devices in preventing distal embolization during ablative procedures are disclosed.
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Citations
19 Claims
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1. A method for necrotic ablation of ectopic foci, comprising steps of:
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providing a catheter having a proximal end, a distal end, a necrotizing ablation instrument at the distal end, and a filter proximal the necrotizing ablation instrument;
inserting the catheter into a vessel;
positioning the filter;
positioning the necrotizing ablation instrument adjacent the ectopic foci;
expanding the filter; and
ablating the ectopic foci, wherein necrotic material released during ablation is captured by the filter; and
repositioning the necrotizing ablation instrument axially with respect to the expanded filter while the expanded filter remains in position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification