Patent ID: 7407497

Claim:
A system for delivery of therapeutic agent from a source of therapeutic agent through a lumen, the system adapted for connection to the source, the system comprising: a hub having a proximal end and a distal end, the proximal end adapted to be connected into fluid communication with the source of therapeutic agent, wherein the hub has a constriction between its proximal end and its distal end; a delivery tube having a lumen, the delivery tube having a proximal end secured within the distal end of the hub and a distal end remote from the hub; and a tubular lining extending within the lumen of the delivery tube, the tubular lining compatible with the therapeutic agent; wherein the system further comprises a collar attached to the proximal end of the delivery tube, the collar being secured within the hub between the proximal end of the hub and the distal end of the hub, wherein the collar causes therapeutic agent delivered from the source and present within the proximal end of the hub to flow into the tubular lining, the collar and tubular lining configured to shield therapeutic agent from contacting materials that are not compatible with the therapeutic agent as the therapeutic agent enters the delivery tube.