Patent US5221256A successfully refreshed from Google Patents.
US5221256A
Expired / Lapsed
US
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Multiple-lumen catheter
Assignee: SUDHA S MAHURKAR TRUST
•
Filing: 1992-02-10
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Granted: 1993-06-22
•
Expires: 2012-02-10
Abstract
Abstract A multiple-lumen catheter comprises an elongated cylindrical tube which has an internal diametral septum extending along the length thereof. This septum and the walls of the tube form at least three longitudinal lumens. The first and second lumens have substantially semi-circular transverse cross-sections which occupy the major portion of the transverse cross-section of the interior of the tube. A third lumen has a small transverse cross-section and is located at the intersection of one diametral end of the septum with the tube. This third lumen lies between a pair of adjacent corners of the first and second lumens.
Inventors
- 👤 Sakharam D. Mahurkar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:59
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0021; A61M25/0023; A61M25/0026; A61M1/00; A61M1/36; A61M1/3621; A61M1/3653; A61M1/3659; A61M1/3661; A61M25/003; A61M2025/0031; A61M25/0032
Claims Analysis
Total Claims: 66
Claim 1
Independent Claim
94 words
A multiple-lumen catheter comprising an elongated cylindrical tube having an internal diametral septum extending along the length thereof, said septum and the walls of said tube forming at least three longitudinal lumens, first and second of said lumens having substantially semi-circular transverse cross-sections occupying the major portion of the transverse cross section of the interior of said tube, and a third lumen having a small transverse cross-section and located at the intersection of one diametral end of said septum with said tube, between a pair of adjacent corners of said first and second lumens.
Claim 2
Dependent Claim
94 words
A multiple-lumen catheter comprising an elongated cylindrical tube having an internal diametral septum extending along the length thereof, said septum and the walls of said tube forming at least three longitudinal lumens, first and second of said lumens having substantially semi-circular transverse cross-sections occupying the major portion of the transverse cross section of the interior of said tube, and a third lumen having a small transverse cross-section and located at the intersection of one diametral end of said septum with said tube, between a pair of adjacent corners of said first and second lumens.
Claim 3
Dependent Claim
31 words
The multiple-lumen catheter of claim 1 wherein a major portion of the transverse width of said septum is flat so that said first and second lumens have generally D-shaped cross sections.
Claim 4
Dependent Claim
78 words
The multiple-lumen catheter of claim 1 which includes a hollow conical tip on the distal end of said tube, the outside surface of said conical tip merging smoothly with the outside surface of said tube, and the inside surface of said conical tip merging smoothly with the inside surface of one of said first and second lumens, the distal ends of the other lumens being longitudinally spaced from the distal end of said tip and from each other.
Claim 5
Dependent Claim
29 words
The multiple-lumen catheter of claim 3 wherein said conical tip forms a solid connection from the distal ends of said other lumens to the distal end of said tip.
Claim 6
Dependent Claim
15 words
The multiple-lumen catheter of claim 1 wherein said third lumen has a circular transverse cross-section.
Claim 7
Dependent Claim
61 words
The multiple-lumen catheter of claim 1 wherein said first lumen extends all the way through the distal end of said tube, said second lumen terminates at an aperture spaced longitudinally from the distal end of said tube, and said third lumen terminates at an aperture located longitudinally between the distal end of said tube and the termination of said second lumen.
Claim 8
Dependent Claim
96 words
The multiple-lumen catheter of claim 1 wherein said elongated cylindrical tube is made of a soft, elastic material, and which includes a reinforcing member embedded within said elastic material and extending along the length of said tube, said reinforcing member being made of a material which is substantially stiffer than the material of said tube so that the catheter can be advanced against a resistance by the application of force proximally of the resistance and so that said first and second lumens will not collapse when pressure differential of a dialysis system exists across said septum.
Claim 9
Dependent Claim
43 words
The dual-lumen catheter of claim 7 wherein said septum comprises a pair of transversely spaced diametral webs formed as integral parts of said tube, and said reinforcing member comprises a flat strip of stiff material inserted longitudinally between said webs and bonded thereto.
Claim 10
Dependent Claim
14 words
The dual-lumen catheter of claim 7 wherein said reinforcing member is made of nylon.
Claim 11
Dependent Claim
94 words
A multiple-lumen catheter comprising an elongated generally cylindrical body, and a septum extending diametrically across the interior of said body and along the length thereof to divide said interior into at least three longitudinal lumens, a major portion of the diametral width of said septum comprising a flat strip which forms two substantially semi-cylindrical, longitudinal lumens on opposite sides thereof, one transverse end of said septum being bifurcated and cooperating with the contiguous portion of the side wall of said body to form a small longitudinal lumen between adjacent corners of said semi-cylindrical lumens.
Claim 12
Dependent Claim
94 words
A multiple-lumen catheter comprising an elongated generally cylindrical body, and a septum extending diametrically across the interior of said body and along the length thereof to divide said interior into at least three longitudinal lumens, a major portion of the diametral width of said septum comprising a flat strip which forms two substantially semi-cylindrical, longitudinal lumens on opposite sides thereof, one transverse end of said septum being bifurcated and cooperating with the contiguous portion of the side wall of said body to form a small longitudinal lumen between adjacent corners of said semi-cylindrical lumens.
Claim 13
Dependent Claim
30 words
The multiple-lumen catheter of claim 10 wherein the portions of said small lumen on opposite sides of the central plane of said septum are symmetrical with respect to that plane.
Claim 14
Dependent Claim
146 words
A multiple-lumen catheter comprising a unitary elongated flexible tube having a circular transverse cross-section and an internal diametral divider extending along the length thereof to divide the interior of said tube into identical first and second lumens having generally semi-circular transverse cross sections, and a third lumen formed by a bifurcation at one diametral end of said divider and the adjoining portion of the tube side wall, said third lumen having a generally circular transverse cross-section, the distal ends of said first, second and third lumens being longitudinally spaced from each other, diversion means attached to the proximal end of said catheter and forming three separate fluid passageways each of which is in fluid communication with one of said lumens, and three extension tubes attached to the proximal end of said diversion means, each of said tubes being in fluid communication with one of said passageways.
Claim 15
Dependent Claim
146 words
A multiple-lumen catheter comprising a unitary elongated flexible tube having a circular transverse cross-section and an internal diametral divider extending along the length thereof to divide the interior of said tube into identical first and second lumens having generally semi-circular transverse cross sections, and a third lumen formed by a bifurcation at one diametral end of said divider and the adjoining portion of the tube side wall, said third lumen having a generally circular transverse cross-section, the distal ends of said first, second and third lumens being longitudinally spaced from each other, diversion means attached to the proximal end of said catheter and forming three separate fluid passageways each of which is in fluid communication with one of said lumens, and three extension tubes attached to the proximal end of said diversion means, each of said tubes being in fluid communication with one of said passageways.
Claim 16
Dependent Claim
40 words
The multiple-lumen catheter of claim 12 wherein the distal opening of said first lumen is at the distal end of said tube, and the distal openings of said second and third lumens are in the side walls of said tube.
Claim 17
Dependent Claim
27 words
The multiple-lumen catheter of claim 12 wherein the distal end of said tube forms a frusto-conical tapered tip that smoothly merges with the circumference of said tube.
Claim 18
Dependent Claim
28 words
The multiple-lumen catheter of claim 14 wherein one of said generally semi-circular lumens extends through said tip and forms a distal opening at the apex of said tip.
Claim 19
Dependent Claim
32 words
The multiple-lumen catheter of claim 12 wherein each of said generally semi-circular lumens has an auxiliary opening in the side wall of said tube and spaced from the distal opening of that.
Claim 20
Dependent Claim
22 words
The multiple-lumen catheter of claim 12 wherein each of said extension tubes is bent back toward the distal end of the catheter.
Claim 21
Dependent Claim
33 words
The multiple-lumen catheter of claim 17 wherein the bent portions of said extension tubes have a memory so that they assume a predetermined shape when not under the influence of an external force.
Claim 22
Dependent Claim
25 words
The multiple-lumen catheter of claim 12 which includes a reinforcing member enclosed within said divider and having a stiffness greater than that of said tube.
Claim 23
Dependent Claim
18 words
The multiple-lumen catheter of claim 19 wherein said reinforcing member surrounds the side walls of said circular lumen.
Claim 24
Dependent Claim
24 words
The multiple-lumen catheter of claim 12 wherein the distal portion of said tube, beyond the distal end of the shorter semi-circular lumen, is cylindrical.
Claim 25
Dependent Claim
162 words
A multiple-lumen catheter comprising a first elongated tube having proximal and distal ends and a substantially circular transverse cross-section, a second elongated tube having a substantially circular transverse cross-section and a smaller diameter than the radius of said first tube and extending along an inside wall of said first tube and joined thereto, an internal divider extending from said second tube across the remainder of the interior of said first tube, said divider extending along a diameter of said first tube and a projected diameter of said second tube, the combination of said first and second tubes and said divider forming a pair of longitudinal lumens of generally semi-circular transverse cross-section on opposite sides of said divider, and a smaller third longitudinal lumen of circular transverse cross-section defined by said second tube, the distal ends of the three lumens being longitudinally spaced from each other, and the proximal ends of all three lumens being located at the proximal end of said tube.
Claim 26
Dependent Claim
162 words
A multiple-lumen catheter comprising a first elongated tube having proximal and distal ends and a substantially circular transverse cross-section, a second elongated tube having a substantially circular transverse cross-section and a smaller diameter than the radius of said first tube and extending along an inside wall of said first tube and joined thereto, an internal divider extending from said second tube across the remainder of the interior of said first tube, said divider extending along a diameter of said first tube and a projected diameter of said second tube, the combination of said first and second tubes and said divider forming a pair of longitudinal lumens of generally semi-circular transverse cross-section on opposite sides of said divider, and a smaller third longitudinal lumen of circular transverse cross-section defined by said second tube, the distal ends of the three lumens being longitudinally spaced from each other, and the proximal ends of all three lumens being located at the proximal end of said tube.
Claim 27
Dependent Claim
40 words
The multiple-lumen catheter of claim 22 wherein the distal opening of said first lumen is at the distal end of said tube, and the distal openings of said second and third lumens are in the side walls of said tube.
Claim 28
Dependent Claim
27 words
The multiple-lumen catheter of claim 22 wherein the distal end of said tube forms a frusto-conical tapered tip that smoothly merges with the circumference of said tube.
Claim 29
Dependent Claim
29 words
The multiple-lumen catheter catheter of claim 24 wherein one of said generally semi-circular lumens extends through said tip and forms a distal opening at the apex of said tip.
Claim 30
Dependent Claim
32 words
The multiple-lumen catheter of claim 22 wherein each of said generally semi-circular lumens has an auxiliary opening in the side wall of said tube and spaced from the distal opening of that.
Claim 31
Dependent Claim
22 words
The multiple-lumen catheter of claim 22 wherein each of said extension tubes is bent back toward the distal end of the catheter.
Claim 32
Dependent Claim
33 words
The multiple-lumen catheter of claim 27 wherein the bent portions of said extension tubes have a memory so that they assume a predetermined shape when not under the influence of an external force.
Claim 33
Dependent Claim
25 words
The multiple-lumen catheter of claim 22 which includes a reinforcing member enclosed within said divider and having a stiffness greater than that of said tube.
Claim 34
Dependent Claim
18 words
The multiple-lumen catheter of claim 29 wherein said reinforcing member surrounds the side walls of said circular lumen.
Claim 35
Dependent Claim
24 words
The multiple-lumen catheter of claim 22 wherein the distal portion of said tube, beyond the distal end of the shorter semi-circular lumen, is cylindrical.
Claim 36
Dependent Claim
103 words
A multiple-lumen catheter comprising an elongated cylindrical tube having an internal diametral septum extending along the length thereof, the side wall of said tube extending inwardly to form a small longitudinal lumen along one side of the interior of the tube, said small lumen having a circular transverse cross section and extending from the proximal end of said tube to a distal opening which is spaced from the distal end of said tube, the remainder of the interior of said tube forming two lumens having distal openings which are longitudinally spaced from each other and from the distal opening of said small lumen.
Claim 37
Dependent Claim
103 words
A multiple-lumen catheter comprising an elongated cylindrical tube having an internal diametral septum extending along the length thereof, the side wall of said tube extending inwardly to form a small longitudinal lumen along one side of the interior of the tube, said small lumen having a circular transverse cross section and extending from the proximal end of said tube to a distal opening which is spaced from the distal end of said tube, the remainder of the interior of said tube forming two lumens having distal openings which are longitudinally spaced from each other and from the distal opening of said small lumen.
Claim 38
Dependent Claim
176 words
A triple-lumen hemodialysis catheter consisting of a first elongated, unitary, flexible, cylindrical tube having a side wall which forms an integral, co-tangential second tube forming a generally circular lumen that has a diameter smaller than the radius of the first tube, and an axial, integral, internal, flat divider separating the interior of said first tube into second and third elongated lumens each of which has a transverse cross section that is generally D-shaped with a dented corner, all three of said lumens having separate openings at the distal end thereof so that the three lumens are in independent fluid communication with the interior of a vein, said second lumen extending beyond the distal opening of the said first lumen to the end of the said first tube while said third lumen ends on a circumferential opening that is axially spaced from the end of said first tube, the proximal end of the said first tube having means to diverge said three lumens from each other and communicating them with respective extension tubes having female luer ends.
Claim 39
Dependent Claim
176 words
A triple-lumen hemodialysis catheter consisting of a first elongated, unitary, flexible, cylindrical tube having a side wall which forms an integral, co-tangential second tube forming a generally circular lumen that has a diameter smaller than the radius of the first tube, and an axial, integral, internal, flat divider separating the interior of said first tube into second and third elongated lumens each of which has a transverse cross section that is generally D-shaped with a dented corner, all three of said lumens having separate openings at the distal end thereof so that the three lumens are in independent fluid communication with the interior of a vein, said second lumen extending beyond the distal opening of the said first lumen to the end of the said first tube while said third lumen ends on a circumferential opening that is axially spaced from the end of said first tube, the proximal end of the said first tube having means to diverge said three lumens from each other and communicating them with respective extension tubes having female luer ends.
Claim 40
Dependent Claim
22 words
The catheter of claim 33 which has a frusto-conical tapered tip that smoothly merges with the circumference of the said first tube.
Claim 41
Dependent Claim
22 words
The catheter of claim 34 wherein said second lumen extends through and exits at the apex of the said frusto-conical tapered tip.
Claim 42
Dependent Claim
24 words
The catheter of claim 33 wherein each of said first and third lumens has at least one additional aperture proximal to its distal opening.
Claim 43
Dependent Claim
27 words
The catheter of claim 33 which includes extension tubes each of which assumes a curved 180° bent shape when not under the influence of an external force.
Claim 44
Dependent Claim
18 words
The catheter of claim 33 which includes an elongated strip of reinforcing material enclosed within said internal divider.
Claim 45
Dependent Claim
21 words
The catheter of claim 33 wherein the portion of the catheter beyond the distal opening of said third lumen is cylindrical.
Claim 46
Dependent Claim
15 words
The catheter of claim 33 wherein the distal portion of said third lumen is removed.
Claim 47
Dependent Claim
144 words
A unitary elongated flexible tube having a circular transverse cross section and containing an eccentric, codiametral, tangential lumen of generally circular cross-section with a diameter smaller than the radius of said tube, and a diametral divider that divides the remainder of the tube into two identical, substantially semicircular lumens, the proximal ends of all the said lumens communicating via diversion means with respective extension tubes, the distal ends of all the said lumens being open to communicate with the interior of a vein, one of the semicircular lumens extending to the end of the tube and the other semicircular lumen opening on its own circumference proximal to the end of the tube, the smaller circular lumen opening by a circumferential aperture intermediate the distal openings of the two semicircular lumens, the distal end of the said catheter being adapted for insertion into a vein.
Claim 48
Dependent Claim
144 words
A unitary elongated flexible tube having a circular transverse cross section and containing an eccentric, codiametral, tangential lumen of generally circular cross-section with a diameter smaller than the radius of said tube, and a diametral divider that divides the remainder of the tube into two identical, substantially semicircular lumens, the proximal ends of all the said lumens communicating via diversion means with respective extension tubes, the distal ends of all the said lumens being open to communicate with the interior of a vein, one of the semicircular lumens extending to the end of the tube and the other semicircular lumen opening on its own circumference proximal to the end of the tube, the smaller circular lumen opening by a circumferential aperture intermediate the distal openings of the two semicircular lumens, the distal end of the said catheter being adapted for insertion into a vein.
Claim 49
Dependent Claim
22 words
The catheter of claim 41 which has a frusto-conical tapered tip that smoothly merges with the circumference of the said first tube.
Claim 50
Dependent Claim
24 words
The catheter of claim 42 wherein one of said semicircular lumens extends through and exits at the apex of the said frusto-conical tapered tip.
Claim 51
Dependent Claim
26 words
The catheter of claim 41 wherein the other semicircular lumen and said circular lumen each has at least one additional aperture proximal to its distal opening.
Claim 52
Dependent Claim
27 words
The catheter of claim 41 which includes extension tubes each of which assumes a curved 180° bent shape when not under the influence of an external force.
Claim 53
Dependent Claim
18 words
The catheter of claim 41 which includes an elongated strip of reinforcing material enclosed within said diametral divider.
Claim 54
Dependent Claim
22 words
The catheter of claim 41 wherein the portion of the catheter beyond the distal opening of said other semicircular lumen is cylindrical.
Claim 55
Dependent Claim
16 words
The catheter of claim 41, wherein the distal portion of said other semicircular lumen is removed.
Claim 56
Dependent Claim
175 words
A multilumen catheter comprising a flexible elongated tube, having proximal and distal ends, the tube enclosing in its interior, a smaller circular tube in circumferential contact with the main tube and having a common diametral plane with said main tube and an axial septum contacting the exterior of the smaller circular tube and interior of the catheter, said septum extending in the said common diametral plane to form two independent longitudinal substantially semicircular lumens which are larger than the lumen formed by said smaller circular tube, the first larger lumen extending to and opening at the distal end of the tube, and the second larger lumen opening proximally of the distal end of the tube on the surface of the catheter, the smaller circular lumen communicating with the exterior of the catheter intermediate the distal openings of said first and said second lumens, the proximal ends of each lumen being connected to and communicating with respective extension tubes via flow diversion means, the distal end of the catheter being adapted for insertion into a vein.
Claim 57
Dependent Claim
175 words
A multilumen catheter comprising a flexible elongated tube, having proximal and distal ends, the tube enclosing in its interior, a smaller circular tube in circumferential contact with the main tube and having a common diametral plane with said main tube and an axial septum contacting the exterior of the smaller circular tube and interior of the catheter, said septum extending in the said common diametral plane to form two independent longitudinal substantially semicircular lumens which are larger than the lumen formed by said smaller circular tube, the first larger lumen extending to and opening at the distal end of the tube, and the second larger lumen opening proximally of the distal end of the tube on the surface of the catheter, the smaller circular lumen communicating with the exterior of the catheter intermediate the distal openings of said first and said second lumens, the proximal ends of each lumen being connected to and communicating with respective extension tubes via flow diversion means, the distal end of the catheter being adapted for insertion into a vein.
Claim 58
Dependent Claim
20 words
The catheter of claim 49 which has a frusto-conical tapered tip that smoothly merges with the circumference of the tube.
Claim 59
Dependent Claim
23 words
The catheter of claim 50 wherein one of said semicircular lumens extends through and exits at the apex of said frusto-conical tapered tip.
Claim 60
Dependent Claim
26 words
The catheter of claim 51 wherein the other semicircular lumen and said circular lumen each has at least one additional aperture proximal to its distal opening.
Claim 61
Dependent Claim
19 words
The catheter of claim 49 which includes extension tubes each of which curves toward the tip of the catheter.
Claim 62
Dependent Claim
24 words
The catheter of claim 53 wherein said extension tubes assume a curved 180° bent shape when not under the influence of an external force.
Claim 63
Dependent Claim
18 words
The catheter of claim 49 which includes an elongated strip of reinforcing material enclosed within said diametral septum.
Claim 64
Dependent Claim
22 words
The catheter of claim 52 wherein the portion of the catheter beyond the distal opening of said other semicircular lumen is cylindrical.
Claim 65
Dependent Claim
16 words
The catheter of claim 52 wherein the distal portion of said other semicircular lumen is removed.
Claim 66
Dependent Claim
21 words
The catheter of claim 52 wherein the distal portion of said other semicircular lumen is blocked off beyond its distal opening.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-21 | 1996-12-21 | 1997-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-21 | 2000-12-21 | 2001-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-21 | 2004-12-21 | 2005-06-22 | $7700.00 | Window Closed / Lapsed |