Conical Balloon for Deployment Into Side Branch
AssigneeBoston Scientific Scimed, Inc.
InventorDarrel C. Gumm
Life of this patent
Estimating the term…
Abstract
A bifurcated catheter assembly has an undeployed state and a deployed state. The assembly comprises a bifurcated inflation shaft defining a shaft inner lumen, a first balloon defining a first balloon lumen, and a second balloon defining a second balloon lumen. The inflation shaft has a first inflation shaft defining a first lumen and a second inflation shaft defining a second lumen. The first balloon defines a first balloon lumen which is in fluid communication with the first lumen. The second balloon defines a second balloon lumen which is in fluid communication with the second lumen. The second balloon has a conical shape.
Claims20
A bifurcated catheter assembly having an undeployed state and a deployed state, the assembly comprising:
- a shaft including a distal region and a proximal region, wherein the distal region of the shaft includes a first branch and a second branch, the first branch defining a first inflation lumen and the second branch defining a second inflation lumen;
- a first balloon disposed about a portion of the first branch and defining a first balloon lumen, the first balloon lumen in fluid communication with the first inflation lumen;
- and
- a second balloon disposed about a portion of the second branch and defining a second balloon lumen, the second balloon lumen in fluid communication with the second inflation lumen, the second balloon being substantially conical shaped throughout its length when inflated.
A bifurcated catheter assembly having an undeployed state and a deployed state, the assembly comprising:
- a first shaft defining a first inflation lumen;
- a second shaft defining a second inflation lumen;
- a first balloon disposed about the first shaft and defining a first balloon lumen, the first balloon lumen in fluid communication with the first inflation lumen;
- a second balloon disposed about the second shaft and defining a second balloon lumen, the second balloon lumen in fluid communication with the second inflation lumen, wherein the first and second balloons are in fluid communication with each other;
- and
- wherein, when inflated, the first balloon has a first working body portion that is substantially cylindrical in shape and, when inflated, the second balloon has a second working body that is substantially conical in shape, the second balloon extending radially outward from the first balloon when the second balloon is inflated;
- and
- a stent disposed about the first balloon and the second balloon, the stent having a primary stent body, wherein a portion of the second balloon extends through the primary stent body when the second balloon is inflated.
A method of deploying a stent at a vessel bifurcation, the vessel bifurcation including a main vessel and a branch vessel, the method comprising:
- providing a catheter assembly having a first shaft, a second shaft, a first balloon and a second balloon, the first shaft defining a first inflation lumen and the second shaft defining a second inflation lumen, the first balloon in fluid communication with the first inflation lumen and the second balloon in fluid communication with the second inflation lumen and the first balloon;
- disposing a stent about the first balloon and the second balloon, the stent including a cylindrical body portion and an expandable side branch portion, the expandable side branch portion being configured to extend into a radially outward orientation relative to the cylindrical body portion, the expandable side branch portion being disposed in axial and radial alignment relative to the second balloon;
- advancing the catheter assembly and stent to the vessel bifurcation;
- inflating the first balloon, the first balloon having a working portion that upon inflation is substantially cylindrical in shape and expands the cylindrical body portion of the stent into engagement with the main vessel;
- and
- inflating the second balloon, wherein the second balloon is conical in shape throughout its length when inflated, wherein a proximal end of the second balloon is maintained in the cylindrical body portion of the stent when inflated, wherein inflating the second balloon causes a distal end of the second balloon to move from a position within the cylindrical body portion of the stent to a position extending radially outside of the cylindrical body portion of the stent, wherein inflating the second balloon expands the side branch portion into the branch vessel.
Dependencies are inferred from the claim text.