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Method and a balloon catheter assembly for treating bifurcation lesions

  • US 8,585,642 B2
  • Filed: 01/17/2011
  • Issued: 11/19/2013
  • Est. Priority Date: 01/22/2010
  • Status: Active Grant
First Claim
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1. A drug delivery system for delivering at least one drug to at least one of a first branch and a second branch of a blood vessel bifurcation, the drug delivery system comprising:

  • a first balloon catheter assembly having a first balloon capable of passing through the blood vessel and being at least partially positioned in the first branch;

    a second balloon catheter assembly having a second balloon capable of passing through the blood vessel and being at least partially positioned in the second branch, wherein at least one of the first balloon and the second balloon is coated with a plurality of nano-carriers, the plurality of nano-carriers comprising at least one drug encapsulated with at least one biological agent, the at least one of the first balloon and the second balloon capable of delivering the plurality of nano-carriers to at least one of the first branch and the second branch upon being positioned and inflated in the at least one of the first branch and the second branch respectively;

    wherein at least one of the first balloon and the second balloon comprises a hydrophilic surface and a non-hydrophilic surface, the hydrophilic surface being coated with the plurality of nano-carriers, wherein a set of nano-carriers of the plurality of nano-carriers is released from the hydrophilic surface within a predetermined duration in response to inflating the at least one of the first balloon and the second balloon at a target site in the at least one of the first branch and the second branch respectively;

    wherein the hydrophilic surface has a layer coated thereon, the layer comprising nano-particles of one of the at least one biological agent and at least one polymer; and

    wherein the layer further comprises a plurality of pores, wherein at least one nano-carrier of the plurality of nano-carriers is deposited in at least one pore of the plurality of pores, wherein the hydrophilic surface is exposed through the plurality of pores and the at least one nano-carrier is in direct contact with the hydrophilic surface.

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