Multiple lumen catheter for hemodialysis

In a multiple lumen catheter for hemodialysis or the like, said catheter having a distal end portion in which at least a pair of the catheter lumens each communicate with the exterior through separate aperture means, the improvement comprising, in combination:

• the aperture means of one of said lumens defining a first port at essentially the distal catheter end, and the aperture means of the other of said lumens defining a second port spaced proximally along the catheter from said distal end and first port, said second port being defined by a substantially annular wall having an outward portion relative to the catheter axis that is positioned slightly closer to said distal end than an inner portion of said substantially annular wall, whereby the axis of said second port is angled inwardly at an acute angle to the catheter axis;
• said one lumen comprising a portion that extends distally beyond said second port, said one lumen portion being defined in a distal catheter portion of substantially helical shape, said catheter having a section thereof which defines an angle of at least about 90.degree., said section being spaced from and proximal of said second port.

In a multiple lumen catheter for hemodialysis or the like, said catheter having a distal end portion in which at least a pair of the catheter lumens each communicates with the exterior through aperture means, the improvement comprising, in combination;

• the aperture means of one of said lumens defining a first port at essentially the distal catheter end, and the aperture means of the other of said lumens defining a second port spaced proximally along the catheter from said distal end and first port, said other lumen terminating at the second port, said one lumen comprising a portion that extends distally beyond said second port to be longitudinally spaced from the other of said lumens, said one lumen portion being defined in a distal catheter portion of substantially helical shape.