Self-sizing catheter features to prevent over-tightening of the electrode
First Claim
1. An ablation device for treatment of tissue in body lumens with varying sizes comprising:
- a catheter;
a balloon member coupled with a distal portion of the catheter, wherein the balloon member is configured to be inflated up to a maximum inflation pressure;
an electrode structure support configured to at least partially unfurl or furl around the balloon member as the balloon member expands or contracts, wherein the electrode structure support forms an overlapping portion at least when the balloon member is completely deflated; and
a spacer coupled with the catheter and configured to limit a size of the overlapping portion such that an inflation pressure sufficient to overcome a frictional resistance caused by the overlapping portion of the electrode structure support remains below the maximum inflation pressure while the balloon member is inflated.
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Accused Products
Abstract
Methods, apparatuses and systems are described for preventing the over-tightening of a furled ablation structure support around an expandable member. An ablation device for treatment of tissue in body lumens with varying sizes is disclosed. The ablation device may include a catheter, an expansion member coupled with a distal portion of the catheter, and an ablation structure support configured to at least partially unfurl or furl around the expansion member as the expansion member expands or contracts. The ablation device may further include a spacer coupled with the catheter and configured to limit a minimum diameter of the ablation structure support when the expansion member is completely contracted.
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Citations
20 Claims
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1. An ablation device for treatment of tissue in body lumens with varying sizes comprising:
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a catheter; a balloon member coupled with a distal portion of the catheter, wherein the balloon member is configured to be inflated up to a maximum inflation pressure; an electrode structure support configured to at least partially unfurl or furl around the balloon member as the balloon member expands or contracts, wherein the electrode structure support forms an overlapping portion at least when the balloon member is completely deflated; and a spacer coupled with the catheter and configured to limit a size of the overlapping portion such that an inflation pressure sufficient to overcome a frictional resistance caused by the overlapping portion of the electrode structure support remains below the maximum inflation pressure while the balloon member is inflated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for treatment of tissue in body lumens with varying sizes comprising:
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providing an ablation device comprising a catheter, a balloon member coupled with a distal portion of the catheter, wherein the balloon member is configured to be inflated up to a maximum inflation pressure, an electrode structure coupled with an electrode structure support, wherein the electrode structure support is configured to wrap around the balloon member such that the electrode structure support at least partially unfurls or furls around the balloon member as the balloon member expands or contracts; tightening the wrapped electrode structure support around the balloon member such that the electrode structure support forms an overlapping portion at least while the balloon member is completely deflated, wherein a spacer coupled with the catheter is configured to limit a size of the overlapping portion such that an inflation pressure sufficient to overcome a frictional resistance caused by the overlapping portion of the electrode structure support remains below the maximum inflation pressure while the balloon member is inflated; expanding the balloon member to at least partially unfurl the electrode structure to engage a circumferential section of a body lumen; and delivering energy through the electrode structure to the circumferential section of the body lumen. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification