Granted Patent B2

US 12,721,980 · App. 17/235,615 · Granted Sep 1, 2026

Inventor: Abhi Vase (Los Altos Hills, CA)

A61M27/006A61B17/221A61M25/0026A61M25/003A61M25/0043A61M25/0053A61M25/0068A61M25/007A61M25/0097A61B5/00A61B17/12A61B2017/22034A61B2017/22051A61B2017/2215A61B2090/064A61M2025/0002A61M2025/0031A61M25/0032A61M25/0041A61M2025/0042A61M25/0045A61M2025/0059A61M25/0067A61M2025/0681A61M25/1011A61M2025/1079A61M2205/3331A61M2210/0693

Abstract

Claims (25)

1 . A catheter comprising:

a proximal subassembly defining two proximal lumens, a proximal subassembly coil having a first pitch, and a plurality of first openings each extending through a wall of the proximal subassembly and disposed between adjacent coil windings of the proximal subassembly coil;

a distal subassembly defining a single distal lumen, a distal subassembly coil having a second pitch which is larger than the first pitch, and a plurality of second openings each extending through a wall of the distal subassembly and disposed between adjacent coil windings of the distal subassembly coil, wherein the plurality of second openings are arranged only in an alternating fashion on a top and a bottom portion of the catheter and each have a two coil pitch spacing;

wherein the proximal subassembly coil and the distal subassembly coil are separate and discontinuous with one another; and

wherein the distal subassembly coil is embedded in the wall of the distal subassembly.

2 . The catheter of claim 1 , wherein the proximal subassembly includes an inner wall and an outer wall.

3 . The catheter of claim 2 , wherein the two proximal lumens include a first lumen and a second lumen, and the first lumen is defined by the inner wall, and the second lumen is defined by a space between the inner wall and the outer wall.

4 . The catheter of claim 3 , wherein the plurality of first openings each extend through the outer wall of the proximal subassembly and are in fluid communication with the second lumen.

5 . The catheter of claim 1 , wherein the wall of the distal subassembly defines the single distal lumen.

6 . The catheter of claim 2 , wherein the distal subassembly includes a first outer diameter and the proximal subassembly includes a second outer diameter that is larger than the first outer diameter.

7 . The catheter of claim 1 , wherein the proximal subassembly coil includes a distal coiled portion having the first pitch, and a proximal coiled portion having a third pitch smaller than the first pitch.

8 . The catheter of claim 1 , wherein the distal subassembly coil includes a distal coiled portion having the second pitch, and a proximal coiled portion having a fourth pitch smaller than the second pitch.

9 . The catheter of claim 1 , wherein the plurality of first openings are spaced with a two coil pitch spacing of the proximal subassembly coil.

10 . A catheter comprising:

a proximal subassembly defining two proximal lumens, a proximal subassembly coil having a first pitch, and a plurality of first openings each extending through a wall of the proximal subassembly and disposed between adjacent coil windings of the proximal subassembly coil;

a distal subassembly defining a single distal lumen, a distal subassembly coil having a second pitch which is larger than the first pitch, and a plurality of second openings each extending through a wall of the distal subassembly and disposed between adjacent coil windings of the distal subassembly coil, wherein the plurality of second openings are arranged only in an alternating fashion on a top and a bottom portion of the catheter and each have a two coil pitch spacing; wherein the proximal subassembly coil is formed from a first wire; wherein the distal subassembly coil is formed from a second wire different from the first wire; wherein the distal subassembly coil is embedded in the wall of the distal subassembly, and wherein the first pitch is in a range from approximately 0.01 inches to approximately 0.03 inches.

11 . The catheter of claim 10 , wherein the plurality of first openings have a two coil pitch spacing of the proximal subassembly coil.

12 . A catheter comprising:

a proximal subassembly defining two proximal lumens, a proximal subassembly coil having a first pitch, and a plurality of first openings each extending through a wall of the proximal subassembly and disposed between adjacent coil windings of the proximal subassembly coil;

a distal subassembly defining a single distal lumen, a distal subassembly coil having a second pitch which is larger than the first pitch, and a plurality of second openings each extending through a wall of the distal subassembly and disposed between adjacent coil windings of the distal subassembly coil, wherein the plurality of second openings are arranged only in an alternating fashion on a top and a bottom portion of the catheter and each have a constant spacing;

wherein the proximal subassembly coil and the distal subassembly coil are separated from one another;

wherein the first pitch is in a range from approximately 0.01 inches to approximately 0.03 inches;

wherein the second pitch is in a range from approximately 0.06 inches to approximately 0.07 inches; and

wherein the distal subassembly coil is embedded in the wall of the distal subassembly.

13 . The catheter of claim 12 , wherein the plurality of first openings have a two coil pitch spacing of the proximal subassembly coil.

Assignments (4)

Continuity (3)

References Cited (387)