Patent ID: 6918888

Claim:
A retrograde cannula for delivering fluid to a patient's vessel, the cannula comprising: a body arrangement defining a longitudinal axis and including coaxial inner and outer bodies, the entire inner body and the entire outer body being axially slidable relative to one another, the inner body forming an infusion lumen extending between proximal and distal ends of the inner body for conducting fluid, the infusion lumen including at least one outlet adjacent the distal end of the inner body thereof for discharging the fluid; and a sealing member disposed on the body arrangement adjacent a distal end of the outer body and being expandable into sealing relationship with the vessel, the sealing member including proximal and distal ends that are moved away from another to collapse the sealing member in response to relative axial sliding between the inner and outer bodies in one direction to reduce a profile of the cannula; wherein the proximal end of the sealing member is affixed to the outer body, and the distal end of the sealing member is affixed to the inner body.