IP Library › Granted Patent US 12,569,654
Granted Patent B2
US 12,569,654 · App. 17/826,331 · Granted Mar 10, 2026

Systems and methods for treatment of fluid overload

Inventors: Yaacov Nitzan (Hertzelia, IL); Sagi Raz (Tel-Aviv, IL); Shani Chen (Givatayim, IL); Or Inbar (Tel-Aviv, IL)
Assignee: White Swell Medical Ltd
A61M27/002A61B17/12045A61B17/12136A61F2/00A61F2/06A61M1/00A61M25/10184A61M60/13A61M60/237A61M60/414A61M60/523A61M60/531A61M60/585A61M60/806A61M60/833A61M60/865A61F2002/068A61M2025/1015A61M2025/1022A61M2025/1052A61M2025/1097A61M2202/0405A61M2205/3317A61M2205/3344A61M2205/8206A61M2210/12A61M2230/30
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Quick Facts
Patent No.
US 12,569,654
App. No.
17/826,331
Granted
Mar 10, 2026
Kind
B2
Abstract

Various systems and methods are provided for reducing pressure at an outflow of a duct, such as the thoracic duct or the lymphatic duct, for example, the right lymphatic duct. A catheter system can be configured to be at least partially implanted within a vein of a patient in the vicinity of an outflow port of a duct of the lymphatic system. The catheter system includes first and second selectively deployable restriction members each configured to be activated to at least partially occlude the vein within which the catheter is implanted and to thus restrict fluid within a portion of the vein. The catheter system includes an impeller configured to be driven by a motor to induce a low pressure zone between the restriction members by causing blood to be pumped through the catheter when the restriction members occlude the vein.

Claims (22)

1 . An apparatus for reducing pressure at an outflow of a duct, the apparatus comprising:

a catheter comprising a proximal end and a distal end;

an impeller operably disposed within the distal end of the catheter;

at least one inlet opening into the catheter proximal to the impeller;

at least one outlet opening from the catheter distal to at least a portion of the impeller;

a restrictor disposed around at least a portion of the distal end of the catheter between the inlet opening and outlet opening, wherein at least a portion of the restrictor is positioned proximal to the impeller such that a distal end of the impeller is positioned distal of the restrictor, wherein the restrictor is configured to direct fluid from an upstream side of the restrictor to the impeller.

2 . The apparatus of claim 1 , wherein when the catheter is positioned at an outlet of a thoracic duct with the restrictor in the activated configuration and when the impeller is operating, the catheter lowers pressure at the outlet of the thoracic duct.

3 . The apparatus of claim 1 , wherein the restrictor is an expandable element.

4 . The apparatus of claim 1 , wherein the restrictor is a compliant balloon.

5 . The apparatus of claim 1 , wherein the catheter is dimensioned to be positioned within an innominate vein.

6 . The apparatus of claim 5 , wherein when the restrictor is activated, it occludes the vein.

7 . The apparatus of claim 1 , wherein when the impeller is operated it pumps fluid through the catheter from the inlet opening to the outlet opening.

8 . The apparatus of claim 1 , wherein the catheter only has the one single restrictor.

9 . The apparatus of claim 1 , further comprising a tapered tip at the distal end.

10 . The apparatus of claim 1 , further comprising an inflation lumen.

11 . The apparatus of claim 1 , wherein the catheter is housed within a sheath used to deliver the catheter to a treatment site.

12 . The apparatus of claim 1 , further comprising a tube disposed at the distal end of the catheter, wherein the impeller is housed within the tube.

13 . The apparatus of claim 12 , wherein the restrictor is mounted around the tube.

14 . The apparatus of claim 13 , wherein the restrictor comprises a compliant balloon.

15 . The apparatus of claim 1 , wherein the impeller is disposed in close proximity to the inlet opening.

16 . The apparatus of claim 15 , wherein a distance between the inlet opening and the outlet opening is substantially similar to a length of the restrictor in an activated state.

17 . The apparatus of claim 15 , wherein the distal end of the impeller and a distal outlet are axially collocated.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 26, 2022
From: NITZAN, YAACOV; RAZ, SAGI; INBAR, OR; CHEN, SHANI
To: WHITE SWELL MEDICAL LTD
Reel/Frame 060908/0976 →
Continuity (6)
Continuation 15870111 · Jan 12, 2018
Continuation 15799562 · Oct 31, 2017
Provisional Application 62445231 · Jan 11, 2017
Provisional Application 62415684 · Nov 1, 2016
Provisional Application 62415964 · Nov 1, 2016
Related Publication 20220280762A1 · Sep 8, 2022
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Extended European Search Report issued in European Application No. 20184530.2, date of mailing: Apr. 19, 2024, 8 pages. [cited by applicant]
Extended European Search Report issued in European Application No. 21821380.9, date of mailing: Apr. 19, 2024, 12 pages. [cited by applicant]