A series of embodiments of multi-lumen, multisegmented (or variable
diameter) catheters and associated multi-channel flow control and measurement systems and methods for simultaneous delivery of a medium to a plurality of locations is described. The need for precise, stable reliable, and repeatable flow control in therapy delivery catheters is crucial to the efficacious treatment of the clinical manifestations of
peripheral vascular disease (PVD) and other such maladies. Such treatments may involve the placement of multi-lumen catheters into
peripheral arterial trees, with the subsequent need to govern the flow dynamics within each individual lumen of the multi-lumen device in such a way that an optimum distribution of the agent is achieved intra-arterially. Combinations of pumps, flow monitors,
pressure monitors, feedback loops and related hardware and
software collectively capable of achieving this goal are described. In other embodiments, this device and method could be used for infusions into tissues and
solid organs, and
microcoil systems can be added to the various components of the
catheter systems to improve the
imaging quality during MR-guided procedures.