| http://www.w3.org/ns/prov#value | - Alternatively, the delivery catheter 12 may have multiple lumens, one for infusion of fluid and one for withdrawl of fluid, and a periodic or continual infusion and withdrawal of fluid may be performed to keep these lumens of the delivery catheter 12 open and unobstructed with cellualr ingrowth, clots, debris or other matter.
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