Seeping flow anti-clotting blood catheter

Patent metadata

Field	Value
Publication number	US-11324918-B2
Application number	US-201815950772-A
Country	US
Kind code	B2
Filing date	Apr 11, 2018
Priority date	Jan 14, 2014
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

A multi-lumen catheter includes a primary lumen having a proximal end and a tip and a secondary lumen parallel to the primary lumen. The primary lumen and the secondary lumen share a wall. A port is defined in the wall proximate the tip of the primary lumen and provides fluidic communication between the primary lumen and the secondary lumen.

First claim

What is claimed is:

1. A multi-lumen catheter comprising:
a primary lumen having a proximal end and a tip;
a secondary lumen parallel to the primary lumen, the primary lumen and the secondary lumen sharing a wall, the secondary lumen defined by the wall and a second wall disposed concentrically about the wall, the wall having a distal end terminating prior to a distal end of the second wall, the wall comprising a fluid permeable membrane; and
one or more ribs fixedly coupling the wall to the second wall and configured and arranged to maintain separation between the wall and the second wall.

2. The catheter of claim 1 , wherein the one or more ribs have a height of between about 20 micrometers and about 2 millimeters.

3. The catheter of claim 1 , wherein the wall terminates prior to a distal tip of the catheter.

4. The catheter of claim 1 , further comprising a plurality of ports defined in the wall along a length of the catheter and providing fluidic communication between the primary lumen and the secondary lumen.

5. The catheter of claim 1 , further comprising a plurality of ports distributed about an outer face of the catheter.

6. The catheter of claim 1 , wherein the second wall comprises a fluid permeable membrane.

7. The catheter of claim 1 , wherein a thickness of the distal end of the second wall is greater than a thickness of a portion of the second wall surrounding the wall.

8. The catheter of claim 2 , wherein the one or more ribs are distributed evenly about a circumference of the catheter.

9. The catheter of claim 8 , wherein the one or more ribs run substantially an entire length of the catheter.

10. The catheter of claim 8 , wherein the one or more ribs run along only a portion of a length of the catheter.

11. The catheter of claim 8 , wherein the one or more ribs are distributed about the circumference of the catheter at a plurality of locations along a length of the catheter.

12. The catheter of claim 5 , configured and arranged such that fluid exits the secondary lumen substantially only through the plurality of ports distributed about the outer face of the catheter.

13. The catheter of claim 5 , configured and arranged such that fluid exits the secondary lumen through the plurality of ports distributed about the outer face of the catheter and through a distal tip of the catheter.

14. A multi-lumen catheter comprising:
a primary lumen having a proximal end and a tip;
a secondary lumen parallel to the primary lumen, the primary lumen and the secondary lumen sharing a wall, the secondary lumen defined by the wall and a second wall disposed concentrically about the wall, the wall having a distal end terminating prior to a distal end of the second wall, the second wall comprising a fluid permeable membrane; and
one or more ribs fixedly coupling the wall to the second wall and configured and arranged to maintain separation between the wall and the second wall.

15. The catheter of claim 14 , wherein the one or more ribs have a height of between about 20 micrometers and about 2 millimeters.

16. The catheter of claim 14 , wherein the wall terminates prior to a distal tip of the catheter.

17. The catheter of claim 15 , wherein the one or more ribs are distributed evenly about a circumference of the catheter.

18. The catheter of claim 17 , wherein the one or more ribs run substantially an entire length of the catheter.

19. The catheter of claim 17 , wherein the one or more ribs run along only a portion of a length of the catheter.

20. The catheter of claim 17 , wherein the one or more ribs are distributed about the circumference of the catheter at a plurality of locations along a length of the catheter.

Assignees

• Charles Stark Draper Laboratory Inc

Inventors

• Charest Joseph L
• Hsiao James
• Dibiasio Christopher
• Hufford Kevin A

Classifications

• A61M25/0043 Primary

  characterised by structural features · CPC title

• A61M25/0029 Primary

  characterized by features relating to least one lumen located at the middle part of the catheter, e.g. slots, flaps, valves, cuffs, apertures, notches, grooves or rapid exchange ports (catheter shaft surface irregularities A61M2025/006) · CPC title

• A61M2025/0057

  Catheters delivering medicament other than through a conventional lumen, e.g. porous walls or hydrogel coatings · CPC title

• A61M2025/006

  having a special surface topography or special surface properties, e.g. roughened or knurled surface · CPC title

• A61M2205/3334

  Measuring or controlling the flow rate · CPC title