Patent ID: 8540694

Claim:
A method for delivering a therapeutic substance to a target region within a patient's body, said method comprising the steps of: A) blocking, at spaced-apart first and second locations, a body conduit having a lumen and a wall, said body conduit being located at or near the target region; and B) causing a quantity of the substance to be contained between the blocked first and second locations, such that the substance will diffuse into or through the wall of the body conduit to reach the target region; wherein the body conduit is blocked by implanting a first blocker device and a second blocker device at the spaced-apart first and second locations within the body conduit lumen to thereby create a substance reservoir zone within the body conduit lumen between the first and second blocker devices and the substance is then deposited between the first and second blocker devices; wherein at least one of the blocker devices comprises a recrossable region and wherein the substance is deposited by i) advancing an injector through a recrossable region of a blocker device, ii) using the injector to deposit the substance between the first and second blocker devices and iii) retracting the injector through the recrossable region and removing the injector.