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Publication Number
US-10441299-B2
Publication Date
2019-10-15
Expiration Date
Abstract
A catheter having a distal balloon and a deformable guidewire shaft of the catheter. The deformable guidewire shaft is adjacent to and external to the balloon. Inflation of the balloon bends the deformable guidewire shaft in order to orient or deflect a distal tip of the deformable guidewire shaft in a desired direction to guide and direct a guidewire extending through the deformable guidewire shaft towards a specific endovascular region. For example, it may be desired to orient the distal tip of the guidewire shaft towards a target vessel of a bifurcation or the balloon catheter may be used to bypass a Chronic Total Occlusion (CTO).
Core Innovation
The invention relates to a balloon catheter having a main catheter shaft with first guidewire lumen, second guidewire lumen, and an inflation lumen, and a balloon extending from a distal end of the main catheter shaft. The inflation lumen is in fluid communication with an interior of the balloon. A first deformable guidewire shaft extends from the distal end of the main catheter shaft, adjacent and external to the balloon, and defines a lumen in fluid communication with the first guidewire lumen of the main catheter shaft. A second deformable guidewire shaft extends from the distal end of the main catheter shaft, adjacent and external to the balloon, and defines a lumen in fluid communication with the second guidewire lumen of the main catheter shaft.
A proximal bond fixes a proximal end of the balloon to the distal end of the main catheter shaft. A first distal bond fixes a distal end of the balloon to a first distal end of the first deformable guidewire shaft or a second distal end of the second deformable guidewire shaft, and a second distal bond fixes the first distal end of the first deformable guidewire shaft to the second distal end of the second deformable guidewire shaft. At least one intermediate bond fixes an intermediate portion of the balloon to an intermediate portion of the second deformable guidewire shaft. An outer surface of the first deformable guidewire shaft between the proximal bond and the first distal bond is not bonded to the balloon and is not bonded to the second deformable guidewire shaft.
Balloon inflation causes the balloon and the first deformable guidewire shaft to bend in radially opposing directions and causes the balloon and the second deformable guidewire shaft to bend in the same direction. This orients the distal ends of the first and second deformable guidewire shafts in directions different from that of the main catheter shaft. Further embodiments include coil-based deformable shaft flexibility, optional radiopaque marker components within the balloon and inflation lumen, and variants with additional intermediate bonds for selective same-direction bending.
Claims Coverage
The independent claim is clm-00001. It recites a balloon catheter architecture with a main catheter shaft, balloon, and first and second deformable guidewire shafts positioned adjacent and external to the balloon, with bonding structures that cause inflation-dependent bending and distinct distal orientation relative to the main catheter shaft.
Balloon catheter with dual guidewire lumens and inflation lumen
A main catheter shaft including a first guidewire lumen, a second guidewire lumen, and an inflation lumen, with a balloon extending from a distal end of the main catheter shaft and the inflation lumen being in fluid communication with an interior of the balloon.
Adjacent external deformable guidewire shafts with lumen communication
A first deformable guidewire shaft extending from the distal end of the main catheter shaft, adjacent and external to the balloon, defining a lumen in fluid communication with the first guidewire lumen of the main catheter shaft, and a second deformable guidewire shaft extending from the distal end of the main catheter shaft, adjacent and external to the balloon, defining a lumen in fluid communication with the second guidewire lumen of the main catheter shaft.
Bonding structure that enables radially opposing and same-direction bending
A proximal bond fixes a proximal end of the balloon to the distal end of the main catheter shaft, a first distal bond fixes a distal end of the balloon to the first deformable guidewire shaft or the second deformable guidewire shaft and a second distal bond fixes the first deformable guidewire shaft to the second deformable guidewire shaft, and at least one intermediate bond fixes an intermediate portion of the balloon to an intermediate portion of the second deformable guidewire shaft while an outer surface segment of the first deformable guidewire shaft between the proximal bond and the first distal bond is not bonded to the balloon and not bonded to the second deformable guidewire shaft.
Inflation causes distal orientation different from the main catheter shaft
Balloon inflation causes the balloon and the first deformable guidewire shaft to bend in radially opposing directions and causes the balloon and the second deformable guidewire shaft to bend in the same direction, thereby orienting distal ends of the first and second deformable guidewire shafts in directions different from that of the main catheter shaft.
Overall, the claim coverage centers on a balloon catheter that uses proximal, distal, and intermediate bonding relationships between an inflated balloon and adjacent external deformable guidewire shafts to create inflation-dependent bending in radially opposing and same directions, resulting in distinct distal orientations of the guidewire shafts relative to the main catheter shaft.
Stated Advantages
Documented Applications
No documented applications found
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