초록 ▼

Vascular access catheters that include a catheter body having one or a plurality of lumens longitudinally extending therethrough. The lumens have cross-sectional shapes that enhance kink resistance, support reliable slit valve operation, and couple securely with the outlet stem of a multiple reservo

Vascular access catheters that include a catheter body having one or a plurality of lumens longitudinally extending therethrough. The lumens have cross-sectional shapes that enhance kink resistance, support reliable slit valve operation, and couple securely with the outlet stem of a multiple reservoir implantable access port. In a dual lumen catheter disclosed, each of the lumens are defined by a plurality of longitudinally extending generally linear inner wall surfaces. The inner wall surfaces when viewed in a transverse cross section of the catheter body taken normal to the longitudinal access have trapezoidal shapes. Other cross-sectional shapes are also illustrated. A generally planar septum separates the pair of lumens. The lumens effect a fluid-tight mechanical engagement between the D-shaped outlet prongs of a conventional outlet stem of an implantable dual reservoir access port, highly reliable two-way, three-position slit valves may be associated with each of the lumens. The valve for each lumen has a closed position thereof in which fluid communication is precluded between the lumen and the exterior of the catheter body, but the valve is selectively operable under the influence of appropriate pressure differentials between the lumens and the exterior of the catheter from the closed position into either an inwardly or an outwardly open position.

대표청구항 ▼

[ What is claimed is:] [1.] A dual lumen catheter implantable in the body of a patient, said catheter comprising:(a) an elongated catheter body of elastomeric material having a longitudinal axis, an exterior surface, a distal end, and an open proximal end;(b) a first lumen longitudinally extending t

[ What is claimed is:] [1.] A dual lumen catheter implantable in the body of a patient, said catheter comprising:(a) an elongated catheter body of elastomeric material having a longitudinal axis, an exterior surface, a distal end, and an open proximal end;(b) a first lumen longitudinally extending through said catheter body from said proximal end to said distal end thereof and being defined by a first set of longitudinally extending inner wall surfaces, the cross section of said first lumen in a transverse cross section of said catheter body taken normal to said longitudinal axis thereof comprising:(i) a generally linear first inner wall surface of said first set of inner wall surfaces; and(ii) a generally linear second inner wall surface of said first set of inner wall surfaces, said second inner wall surface being nonadjacent to said first inner wall surface, and the length of said first inner wall surface of said first set of inner wall surfaces being less than the length of said second inner wall surface of said first set of inner wall surfaces;(c) a second lumen longitudinally extending through said catheter body from said proximal end to said distal end thereof and being defined by a second set of longitudinally extending inner wall surfaces; and(d) first valve means associated with said first lumen at said distal end of said catheter body (1) for selectively infusing fluid from said first lumen to said exterior of said catheter body, (2) for selectively withdrawing fluid through said first lumen from said exterior of said catheter body, and (3) for selectively precluding fluid communication between said first lumen and said exterior of said catheter body.