Coaxial dual lumen catheter
First Claim
1. A dual lumen catheter comprising:
- (a) a catheter body having a proximal end and a distal end, said catheter body comprising;
(i) an inner tube comprised of an inner tube material and enclosing a first lumen open at said proximal end and at said distal end of said catheter body;
(ii) an outer tube comprised of an outer tube material enclosing said inner tube, thereby defining a second lumen between said inner tube and said outer tube, said second lumen being open at said proximal end of said catheter body;
(iii) a distal extremity of said catheter body, the interior of said outer tube converging radially inwardly at said distal extremity of said catheter body into contact with said inner tube, thereby terminating the distal extent of said second lumen; and
(b) a tubular transition portion extending distally from said distal extremity of said catheter body at which said inner tube is permanently secured to said outer tube, said transition portion being comprised of said inner tube material and said outer tube material blended into an integral structure, and said transition portion having an open distal end, an open proximal end, and an outer cross section smaller than the outer cross section of said outer tube, said open proximal end of said transition portion communicating smoothly and continuously with said first lumen at said distal extremity of said catheter body.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention provides a dual lumen catheter comprising outer and inner tube materials. A main portion extends axially and has a selected first cross-section. The main portion includes main portions of the respective outer and inner tube materials which together define an annular intake lumen and a main part of a return lumen contained inside the intake lumen. A tubular transition portion is made up integrally of both the outer and inner tube materials and has a second cross-section smaller than the first cross-section. The transition portion extends axially from the distal end of the main portion and this can be extended to include a tip portion made up only of outer tube material and which extends axially from the transition portion. The transition portion on its own, or with the tip portion, defines a tip section which is a continuation of said main part of the return lumen to complete the return lumen.
102 Citations
56 Claims
-
1. A dual lumen catheter comprising:
-
(a) a catheter body having a proximal end and a distal end, said catheter body comprising; (i) an inner tube comprised of an inner tube material and enclosing a first lumen open at said proximal end and at said distal end of said catheter body; (ii) an outer tube comprised of an outer tube material enclosing said inner tube, thereby defining a second lumen between said inner tube and said outer tube, said second lumen being open at said proximal end of said catheter body; (iii) a distal extremity of said catheter body, the interior of said outer tube converging radially inwardly at said distal extremity of said catheter body into contact with said inner tube, thereby terminating the distal extent of said second lumen; and (b) a tubular transition portion extending distally from said distal extremity of said catheter body at which said inner tube is permanently secured to said outer tube, said transition portion being comprised of said inner tube material and said outer tube material blended into an integral structure, and said transition portion having an open distal end, an open proximal end, and an outer cross section smaller than the outer cross section of said outer tube, said open proximal end of said transition portion communicating smoothly and continuously with said first lumen at said distal extremity of said catheter body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
-
-
30. A cardiovascular access catheter comprising:
-
(a) a catheter body having a proximal end and a distal end, said catheter body comprising; (i) an inner tube of circular outer cross section comprised of an inner tube material and enclosing a first lumen open at said proximal end and at said distal end of said catheter body; (ii) an outer tube of circular outer cross section comprised of an outer tube material enclosing said inner tube, thereby defining a second lumen between said inner tube and said outer tube, said second lumen being open at said proximal end of said catheter body; (iii) a conical distal extremity of said catheter body, the interior of said outer tube converging radially inwardly at said distal extremity of said catheter body into contact with said inner tube, thereby terminating the distal extent of said second lumen; and (b) a tubular transition portion extending distally from said distal extremity of said catheter body at which said inner tube is permanently secured to said outer tube, said transition portion being comprised of said inner tube material and said outer tube material blended into an integral structure, and said transition portion having an open distal end, an open proximal end, and an outer cross section smaller than the outer cross section of said outer tube, said open proximal end of said transition portion communicating smoothly and continuously with said first lumen at said distal extremity of said catheter body; (c) a tubular tip portion extending distally from said distal end of said transition portion, said tip portion being comprised of said outer tube material and being substantially free of said inner tube material, and said tip portion comprising; (i) an outer cross section substantially similar to said outer cross section of said transition portion; (ii) an open distal end; (iii) an open proximal end, said open proximal end of said tip portion communicating smoothly and continuously with said open distal end of said transition portions; and (iv) a conical tubular distal extremity of said tip portion extending distally therefrom and being integrally formed therewith; (d) a bifurcation hub attached to said outer tube and to said inner tube at said proximal end of said catheter body; (e) a first catheter access tube attached to said bifurcation hub and communicating therethrough to said first lumen at said proximal end of said catheter body; and (f) a second catheter access tube attached to said bifurcation hub and communicating therethrough to said second lumen at said proximal end of said catheter body. - View Dependent Claims (31, 32, 33, 34, 35)
-
-
36. A cardiovascular access catheter comprising:
-
(a) a catheter body having a proximal end and a distal end, said catheter body comprising; (i) an inner tube comprised of an inner tube material and enclosing a first lumen open at said proximal end and at said distal end of said catheter body; (ii) an outer tube comprised of an outer tube material enclosing said inner tube, thereby defining a second lumen between said inner tube and said outer tube, said second lumen being open at said proximal end of said catheter body; (iii) a conical distal extremity of said catheter body, the interior of said outer tube converging radially inwardly at said distal extremity of said catheter body into contact with said inner tube, thereby terminating the distal extent of said second lumen; and (b) a tubular transition portion extending distally from said distal extremity of said catheter body at which said inner tube is permanently secured to said outer tube, said transition portion being comprised of said inner tube material and said outer tube material blended into an integral structure, and said transition portion having an open distal end, an open proximal end, and an outer cross section smaller than the outer cross section of said outer tube, and said open proximal end of said transition portion communicating smoothly and continuously with said first lumen at said distal extremity of said catheter body; and (c) a tubular tip portion extending distally from said distal end of said transition portion, said tip portion comprising; (i) an outer cross section substantially similar to said outer cross section of said transition portion; (ii) an open distal end; (iii) an open proximal end, said open proximal end of said tip portion communicating smoothly and continuously with said open distal end of said transition portions; and (iv) a tubular distal extremity of said tip portion extending distally therefrom and being integrally formed therewith. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
-
Specification