CPC A61M 25/0662 (2013.01) [A61M 5/1452 (2013.01); A61M 25/007 (2013.01); A61N 5/1007 (2013.01); A61N 5/1027 (2013.01); A61M 2025/0004 (2013.01); A61M 2025/0681 (2013.01); A61M 2205/051 (2013.01); A61N 2005/1024 (2013.01)] | 16 Claims |
1. A catheter assembly for delivery of a medical solution inside a human body comprising:
an outer tube having a wall surrounding a central lumen extending along an axis and including at least one exit port positioned along its length extending through the wall and having an open proximal end;
an inner tube having a wall surrounding a central lumen extending along the axis and slidably receivable within the central lumen of the outer tube along the axis at the proximal end of the outer tube and having a closed distal end and having at least one exit port extending through the wall and communicating with the at least one exit port of the outer tube to allow fluid flow from the central lumen of the inner tube through the at least one exit port of the inner tube and the at least one exit port of the outer tube at a range of relative positions along the axis; and
an inner plunger slidably receivable within the central lumen of the inner tube along the axis at the proximal end of the inner tube, the plunger interfacing with the inner tube to promote fluid flow into and out of the at least one exit port of the inner tube by translating the plunger along the axis;
wherein the inner plunger is configured to drive fluid flow into the central lumen of the inner tube through the at least one exit port of the inner tube by translation of the inner plunger in a first direction along the axis and to drive fluid flow out of the central lumen of the inner tube through the at least one exit port of the inner tube and the at least one exit port of the outer tube by translation of the inner plunger in a second opposite direction along the axis.
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