Ventricular assist device

Patent metadata

Field	Value
Publication number	US-2021069395-A1
Application number	US-202016952444-A
Country	US
Kind code	A1
Filing date	Nov 19, 2020
Priority date	Jan 10, 2018
Publication date	Mar 11, 2021
Grant date	—

Abstract

Apparatus and methods are described including a left ventricular assist device. The left ventricular assist device includes an impeller configured to be placed inside a subject's left ventricle, and to pump blood from the subject's left ventricle to the subject's aorta, by rotating. A frame is disposed around the impeller. A tube traverses the subject's aortic valve, such that a proximal portion of the tube is disposed within the subject's aorta and a distal portion of the tube is disposed within the subject's left ventricle. The distal portion of the tube defines one or more blood inlet openings that are configured to allow blood to flow from the subject's left ventricle into the tube. A braided element is configured to prevent inner structures of the left ventricle from passing into the one or more blood inlet openings. Other applications are also described.

First claim

1 . An apparatus comprising:
a left ventricular assist device comprising:
an impeller configured to be placed inside a left ventricle of a subject, and to pump blood from the subject's left ventricle to an aorta of the subject, by rotating;
a frame disposed around the impeller;
a tube configured to traverse an aortic valve of the subject, such that a proximal portion of the tube is disposed within the subject's aorta and a distal portion of the tube is disposed within the subject's left ventricle, the distal portion of the tube defining one or more blood inlet openings that are configured to allow blood to flow from the subject's left ventricle into the tube; and
a braided element configured to prevent inner structures of the left ventricle from passing into the one or more blood inlet openings.

2 . The apparatus according to claim 1 , wherein the braided element comprises a shape-memory material.

3 . The apparatus according to claim 1 , wherein the braided element is not covered.

4 . The apparatus according to claim 1 , wherein a distal tip of the braided element is configured to invert.

5 . The apparatus according to claim 1 , wherein the braided element is configured to prevent a portion of the left ventricular assist device from becoming entangled with chordae tendineae of the left ventricle.

6 . The apparatus according to claim 1 , wherein the braided element is configured to prevent a portion of the left ventricular assist device from causing trauma to the inner structures of the left ventricle.

7 . The apparatus according to claim 1 , wherein the inner structures of the left ventricle include inner structures of the left ventricle selected from the group consisting of: an interventricular septum, chordae tendineae, papillary muscles, and an apex of the left ventricle.

8 . The apparatus according to claim 1 , wherein the braided element is configured to separate the one or more blood inlet openings from the inner structures of the left ventricle in three dimensions.

9 . The apparatus according to claim 1 , wherein, in a non-radially constrained configuration of the left-ventricular assist device, the braided element is shaped such as to direct blood flow from the subject's left ventricle into the one or more blood inlet openings.

10 . The apparatus according to claim 1 , wherein the braided element comprises a radially-expandable braided element.

11 . The apparatus according to claim 1 , wherein the braided element is covered with a material.

12 . The apparatus according to claim 11 , wherein the braided element is covered with a blood-impermeable material.

13 . A method comprising:
placing a left ventricular assist device into a left ventricle of a subject, the left ventricular assist device including:
a tube configured to traverse an aortic valve of the subject, such that a proximal portion of the tube is disposed within an aorta of the subject and a distal portion of the tube is disposed within the subject's left ventricle,
an impeller disposed within the distal portion of the tube,
a frame disposed around the impeller, and
a braided element;
operating the impeller such as to pump blood into the tube via one or more blood inlet openings that are disposed within the subject's left ventricle; and deploying the braided element such as to prevent inner structures of the left ventricle from passing into the one or more blood inlet openings.

14 . The method according to claim 13 , wherein deploying the braided element comprises deploying the braided element such as to prevent inner structures of the left ventricle from passing into the one or more blood inlet openings, the inner structures of the left ventricle including inner structures of the left ventricle selected from the group consisting of: an interventricular septum, chordae tendineae, papillary muscles, and an apex of the left ventricle.

15 . The method according to claim 13 , wherein deploying the braided element such as to prevent inner structures of the left ventricle from passing into the one or more blood inlet openings comprises deploying the braided element such as to separate the one or more blood inlet openings from the inner structures of the left ventricle in three dimensions.

16 . The method according to claim 13 , wherein deploying the braided element comprises causing the braided element to radially expand.

17 . The method according to claim 13 , wherein deploying the braided element comprises using the braided element such as to direct blood flow from the subject's left ventricle into the one or more blood inlet openings.

18 . The method according to claim 13 , wherein deploying the braided element comprises deploying an uncovered braided element.

19 . The method according to claim 13 , wherein deploying the braided element comprises deploying a braided element that is covered.

20 . The method according to claim 13 , wherein deploying the braided element comprises preventing a portion of the left ventricular assist device from becoming entangled with chordae tendineae of the left ventricle.

21 . The method according to claim 13 , wherein deploying the braided element comprises preventing a portion of the left ventricular assist device from causing trauma to the inner structures of the left ventricle.

Assignees

• Magenta Medical Ltd

Inventors

• Tuval Yosi
• Sohn Zev
• Schwammenthal Ehud
• Lubinsky Gad

Classifications

• A61B5/0215 Primary

  by means inserted into the body · CPC title

• A61M60/812

  Vanes or blades, e.g. static flow guides · CPC title

• A61M60/531

  using blood pressure data, e.g. from blood pressure sensors · CPC title

• A61M60/237

  the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps · CPC title

• A61M60/554

  of blood pressure · CPC title