Infusion device for distributing infusate along an elongated infusion segment

An infusion device for delivering an infusate from an external source of infusate into a body lumen in an infusate distribution profile, said infusion device further comprising:

• an elongated tubular body having an external side wall extending between a proximal tubular body end and a distal tubular body end adapted to be introduced intraluminally into a body lumen, said elongated tubular body formed of an elongated inner tube having an inner tube lumen and inner tube side wall and an elongated outer tube having an outer tube lumen and outer tube side wall arranged in a coaxial arrangement wherein said inner tube is located within said outer tube lumen and an annular lumen is thereby formed between the inner tube side wall and the outer tube side wall, said inner tube lumen having a proximal inner lumen end opening at said proximal tubular body end, and said annular tube lumen having a proximal annular lumen end opening at said proximal tubular body end;
• an elongated infusion segment formed of a segment of said elongated tubular body adapted to be intraluminally positioned within the body lumen, said elongated infusion segment extending between a proximal infusion segment end and a distal infusion segment end and having a proximal infusion section extending distally from said proximal infusion segment end and a distal infusion section extending proximally from said distal infusion segment end;
• an infusate distribution manifold formed of a segment of said annular lumen extending coextensively with said infusion segment, said infusate distribution manifold having a proximal distribution manifold end opening that allows flow of infusate into said infusate distribution manifold and then in a distal direction therethrough along said proximal infusion section of said infusion segment, and a distal distribution manifold end opening that allows flow of infusate into said infusate distribution manifold and then in a proximal direction therethrough along said distal infusion section of said infusion segment;
• a plurality of side wall exit ports extending from said infusate distribution manifold through said outer tube side wall that allow flow of infusate from said infusate distribution manifold therethrough and into the body lumen, the individual side wall exit ports spaced apart along said outer tube side wall in said proximal and distal infusion sections of said infusion segment;
• infusate transmission means formed in the distal end of said inner tube side wall for allowing transmission of infusate from the distal end of said inner tube lumen to said distal manifold end opening;
• first infusate introduction means at said tubular body proximal end in fluid communication with said inner lumen proximal end opening for delivering infusate distally in a first flow path through said inner lumen and through said infusate introduction means and then through said distal manifold end opening at a first flow rate related to a first infusate flow resistance of the first flow path, such that infusate flows proximally through the infusate distribution manifold and primarily through the side wall exit ports in the distal infusion section and into the body lumen;
• and
• second infusate introduction means at said tubular body proximal end in fluid communication with said annular lumen proximal end opening for delivering infusate distally in a second flow path through a proximal segment of said annular lumen and through the proximal manifold end opening at a second flow rate related to a second infusate flow resistance of the second flow path such that infusate flows distally through the infusate distribution manifold and primarily through the side wall exit ports in the proximal infusion section and into the body lumen,
• whereby the first and second flow rates establish the infusate distribution profile of infusate flowing through the plurality of side wall exit ports along the infusion segment.