Catheter pump with off-set motor position

Patent metadata

Field	Value
Publication number	US-12478774-B2
Application number	US-202318462285-A
Country	US
Kind code	B2
Filing date	Sep 6, 2023
Priority date	Apr 15, 2014
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

A catheter pump assembly is provided that includes an elongate body, an elongate flexible shaft disposed in the elongate body, and an impeller coupled with the distal end of the elongate flexible shaft. The drive system includes a drive component, a motor and a tension member. The tension member is coupled with the motor and the drive component and to cause the drive component to rotate, and thereby to cause the impeller to rotate.

First claim

What is claimed is:

1 . A percutaneous heart pump comprising:
a drive shaft; an armature assembly comprising a plurality of windings; and a rotor coupled to the drive shaft and positioned within the armature assembly, the plurality of windings in the armature assembly energizable to rotate the rotor, wherein the drive shaft is flexible.

2 . The percutaneous heart pump of claim 1 , further comprising a control system coupled to the armature assembly via a lead, the control system including one or more processors and configured to supply the plurality of windings with current to energize the plurality of windings.

3 . The percutaneous heart pump of claim 1 , further comprising a sensor configured to assist in energizing the plurality of windings.

4 . The percutaneous heart pump of claim 3 , wherein the sensor is disposed in a magnetic field generated by the armature assembly.

5 . The percutaneous heart pump of claim 1 , further comprising a housing, wherein the armature assembly and the rotor are positioned within the housing.

6 . The percutaneous heart pump of claim 5 , wherein the housing includes a first recess configured to receive a first portion of the armature assembly, and a cap configured to receive a second portion of the armature assembly.

7 . The percutaneous heart pump of claim 1 , wherein a space is defined between the armature assembly and the rotor.

8 . A percutaneous heart pump, comprising:
a drive shaft; an armature assembly comprising a plurality of windings; a rotor coupled to the drive shaft and positioned within the armature assembly, the plurality of windings in the armature assembly energizable to rotate the rotor; and an output shaft coupled to the rotor, wherein a distal end of the drive shaft is connected to the output shaft.

9 . The percutaneous heart pump of claim 8 , further comprising a control system coupled to the armature assembly via a lead, the control system including one or more processors and configured to supply the plurality of windings with current to energize the plurality of windings.

10 . The percutaneous heart pump of claim 8 , further comprising a sensor configured to assist in energizing the plurality of windings.

11 . The percutaneous heart pump of claim 10 , wherein the sensor is disposed in a magnetic field generated by the armature assembly.

12 . The percutaneous heart pump of claim 8 , further comprising a housing, wherein the armature assembly and the rotor are positioned within the housing.

13 . A percutaneous heart pump, comprising:
a drive shaft; an armature assembly comprising a plurality of windings; a rotor coupled to the drive shaft and positioned within the armature assembly, the plurality of windings in the armature assembly energizable to rotate the rotor; and a flexible catheter extending distally of the armature assembly, the drive shaft extending through the flexible catheter.

14 . The percutaneous heart pump of claim 13 , wherein the flexible catheter further comprises an impeller coupled to the drive shaft, and a distal end located at a distance from the armature assembly, the impeller being operable by the drive shaft at the distal end of the flexible catheter.

15 . The percutaneous heart pump of claim 14 , wherein the impeller is self-expanding.

16 . The percutaneous heart pump of claim 13 , further comprising a control system coupled to the armature assembly via a lead, the control system including one or more processors and configured to supply the plurality of windings with current to energize the plurality of windings.

17 . The percutaneous heart pump of claim 13 , further comprising a sensor configured to assist in energizing the plurality of windings.

18 . The percutaneous heart pump of claim 17 , wherein the sensor is disposed in a magnetic field generated by the armature assembly.

19 . The percutaneous heart pump of claim 13 , further comprising a housing, wherein the armature assembly and the rotor are positioned within the housing.

20 . The percutaneous heart pump of claim 19 , wherein the housing includes a first recess configured to receive a first portion of the armature assembly, and a cap configured to receive a second portion of the armature assembly.

21 . A percutaneous heart pump comprising:
an armature comprising a plurality of windings being activatable in phases to commutate a magnetic field; a driven assembly comprising an impeller and a magnet, wherein the magnet is configured to rotate in correspondence with commutation of the magnetic field, the magnet coupled with the impeller to urge the impeller in rotation, wherein the impeller is configured to urge a fluid in motion as the impeller rotates.

22 . The percutaneous heart pump according to claim 21 , wherein the armature and the driven assembly are so sized as to be insertable in a patient's body.

23 . The percutaneous heart pump according to claim 21 , wherein the armature is positioned proximally of the impeller.

24 . The percutaneous heat pump according to claim 21 , further comprising an elongate body extending from a proximal end to a distal end, wherein the impeller is coupled with the distal end of the elongate body.

25 . The percutaneous heart pump according to claim 24 , wherein the armature is positioned proximally of the impeller.

Assignees

• Tc1 Llc

Inventors

• Muller Paul F

Classifications

• A61M60/538

  Regulation using real-time blood pump operational parameter data, e.g. motor current · CPC title

• A61M60/216

  including a rotating member acting on the blood, e.g. impeller · CPC title

• A61M60/515

  Regulation using real-time patient data · CPC title

• A61M60/178

  drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices · CPC title

• A61M60/13

  by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system · CPC title