Patent ID: 8425459

Claim:
A balloon catheter for delivering a therapeutic agent to target site in a blood vessel, the balloon catheter comprising: a coating layer overlying an exterior surface of a balloon, the coating layer comprising a therapeutic agent, a contrast agent, and at least one first additive, wherein: the therapeutic agent is selected from the group consisting of paclitaxel, rapamycin, and combinations thereof; and the contrast agent is selected from the group consisting of iobitridol, iohexol, iomeprol, iopamidol, iopentol, iopromide, ioversol, ioxilan, iotrolan, iodixanol, and ioxaglate; and the at least one first additive comprises a PEG fatty ester selected from the group consisting of PEG laurates, PEG oleates, PEG stearates, PEG glyceryl laurates, PEG glyceryl oleates, PEG glyceryl stearates, PEG sorbitan monolaurates, PEG sorbitan monooleates, PEG sorbitan stearates, PEG sorbitan laurates, PEG sorbitan oleates, PEG sorbitan palmitates, and combinations thereof.