Ventricular assist device for intraventricular placement

Patent metadata

Field	Value
Publication number	US-9956333-B2
Application number	US-201715416404-A
Country	US
Kind code	B2
Filing date	Jan 26, 2017
Priority date	Feb 8, 2008
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

A ventricular assist device includes a pump such as an axial flow pump, an outflow cannula connected to the outlet of the pump, and an anchor element. The anchor element is physically connected to the pump, as by an elongated element. The pump is implanted within the left ventricle with the outflow cannula projecting through the aortic valve but desirably terminating short of the aortic arch. The anchor element is fixed to the wall of the heart near the apex of the heart so that the anchor element holds the pump and outflow cannula in position.

First claim

The invention claimed is:

1. A blood pump for intraventricular placement inside a heart of a mammalian subject comprising:
a rigid elongate member defining a major longitudinal axis having a length between proximal and distal ends and a bore extending along the length;
an anchor element connected proximate the proximal end of the rigid elongate member and mountable to the subject's heart; and
a pump defining a pump axis and including an inlet at a first end and an outlet at a second end, the inlet and outlet being positioned along the pump axis, a rotor defining a rotor axis coincident with the pump axis and including at least one electric drive coil spaced laterally from the pump axis and the rotor axis for magnetically driving the rotor, the pump being coupled proximate the distal end of the rigid elongate member and remote from the anchor element, the rotor axis and the pump axis being offset from the member axis.

2. The pump of claim 1 , further comprising a wiring extending through the bore of the pump, and wherein the proximal end of the rigid elongate member includes a fitting through which the wiring passes into the bore of the rigid elongate member.

3. The pump of claim 2 , wherein the wiring extends from a source of electrical power, through the fitting of the rigid elongate member, through the bore of the rigid elongate member, and to the at least one electric drive coil to drive the rotor of the pump.

4. The pump of claim 2 , wherein the fitting is a fluid-tight feedthrough.

5. The pump of claim 1 , wherein the rigid elongate member includes at least one curve along at least a portion of its length.

6. The pump of claim 1 , wherein the rigid elongate member is connected to the inlet of the pump without occluding blood flow into the inlet of the pump.

7. The pump of claim 6 , wherein the rigid elongate member is C-shaped forming an inner channel, and the bore has a cross-sectional shape of a partial annulus, wherein an inner diameter of the channel is similar to a diameter of the inlet of the pump such that blood can pass longitudinally along the channel and into the pump inlet.

8. The pump of claim 6 , wherein the rigid elongate member has an outer surface having a cross-sectional shape of a teardrop, wherein the outer surface of the rigid elongate member is streamlined to facilitate fluid flow across the rigid elongate member.

9. The pump of claim 1 , wherein the bore of the rigid elongate member has a cross-sectional shape of at least one from the group consisting of a circle, partial annulus, and teardrop.

10. A blood pump for intraventricular placement inside a heart of a mammalian subject comprising:
a pump defining a pump axis, the pump being positionable within the heart and including an inlet and an outlet, the inlet and outlet being positioned along the pump axis, a rotor, and at least one electric drive coil for magnetically driving the rotor; and
an elongate member including a defined pathway having a length and a wiring extending along the defined pathway, the entire length of the defined pathway being offset from the pump axis extending from outside of the pump and into the at least one electric drive coil.

11. The blood pump of claim 10 , wherein the defined pathway is in communication with the inlet of the pump without occluding blood flow into the inlet of the pump.

12. The blood pump of claim 10 , wherein the defined pathway includes a conduit including a bore.

13. The blood pump of claim 12 , wherein the bore is in communication with the inlet of the pump without occluding blood flow into the inlet of the pump.

14. A method for intraventricular placement inside a heart of a mammalian subject comprising:
providing a pump defining a pump axis and having a housing defined between an inlet and an outlet positioned along the pump axis;
advancing an entirety of the pump housing through a wall of the subject's heart and into a chamber of the subject's heart; and
extending an elongate member including a defined pathway having a length and a wiring along the defined pathway, the entire length of the defined pathway being offset from the pump axis, from a location outside of the subject's heart through the wall of the subject's heart.

15. The method of claim 14 , wherein the step of extending the wiring includes extending the wiring along the defined pathway to one of the group consisting of the inlet and the outlet of the pump without occluding blood flow through the inlet or outlet of the pump.

16. The method of claim 15 , wherein the defined pathway is a bore extending axially through a rigid elongate member extending from the pump to an anchor element, the method further comprising the step of, after advancing the entirety of the pump through the wall of the subject's heart and into the chamber of the subject's heart, mounting the anchor element to the wall of the subject's heart.

17. The method of claim 16 , wherein the wiring is extended through the wall of the subject's heart through a passage in the anchor element through which the rigid elongate member extends.

Assignees

• Heartware Inc

Inventors

• Larose Jeffrey A
• Shambaugh Jr Charles R
• White Steve A
• Tamez Daniel

Classifications

• A61M1/101

  Human Necessities · mapped topic

• A61M1/1031

  Human Necessities · mapped topic

• A61M1/1008

  Human Necessities · mapped topic

• A61M1/1036

  Human Necessities · mapped topic

• A61M1/1012

  Human Necessities · mapped topic