Catheter pump assembly including a stator

• US 10,071,192 B2
• Filed: 03/14/2017
• Issued: 09/11/2018
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: TC1 LLC (Abbott Laboratories)
• Original Assignee: TC1 LLC (Abbott Laboratories)
• Inventors: Zeng, Zijing
• Primary Examiner(s): Manuel, George
• Application Number:
  US15/458,279
• Publication Number:
  US 20170296722A1
• Time in Patent Office: 546 Days
• CPC Class Codes: A61M 1/3659 Cannulae pertaining to extracorporeal circulation
• CPC Class Codes: A61M 25/0082 Catheter tip comprising a tool
• CPC Class Codes: A61M 60/13 by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system
• CPC Class Codes: A61M 60/148 in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
• CPC Class Codes: A61M 60/174 discharging the blood to the ventricle or arterial system via a cannula internal to the ventricle or arterial system
• CPC Class Codes: A61M 60/237 the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps
• CPC Class Codes: A61M 60/411 generated by an electromotor
• CPC Class Codes: A61M 60/414 transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter
• CPC Class Codes: A61M 60/422 the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps
• CPC Class Codes: A61M 60/808 specially adapted for deformable impellers, e.g. expandable impellers
• CPC Class Codes: A61M 60/81 Pump housings
• CPC Class Codes: A61M 60/857 Implantable blood tubes

Abstract

A catheter pump assembly is provided that includes a proximal a distal portion, a catheter body, an impeller, and a flow modifying structure. The catheter body has a lumen that extends along a longitudinal axis between the proximal and distal portions. The impeller is disposed at the distal portion. The impeller includes a blade with a trailing edge. The flow modifying structure is disposed downstream of the impeller. The flow modifying structure has a plurality of blades having a leading edge substantially parallel to and in close proximity to the trailing edge of the blade of the impeller and an expanse extending downstream from the leading edge. In some embodiments, the expanse has a first region with higher curvature and a second region with lower curvature. The first region is between the leading edge and the second region.

Claims

1. A catheter pump comprising:

a sheath;

a cannula disposed at a distal portion of the catheter pump and having a stored configuration when disposed within the sheath and an expanded configuration when advanced distally from the sheath; and

an impeller disposed within the cannula and a stator disposed downstream of the impeller within the cannula, the impeller and the cannula sized and shaped, when in the stored configuration, to be inserted into a vascular system of a patient through a percutaneous access site having a size less than about 21 FR,

wherein the impeller, disposed in the cannula in the expanded configuration, is configured to pump blood in the vascular system at physiological rates at speeds less than 25,000 RPM.

2. The catheter pump of claim 1, wherein the catheter pump is configured to pump blood at 5 liters per minute and 62 mmHG at while being operated at speeds less than about 20,000 RPM.

3. The catheter pump of claim 1, wherein the catheter pump is configured to pump blood at 4 liters per minute and 62 mmHG at while being operated at speeds less than about 19,000 RPM.

4. The catheter pump of claim 1, wherein the catheter pump is configured to pump blood at 6 liters per minute and 62 mmHG at while being operated at about 20,000 RPM.

5. The catheter pump of claim 1, wherein the catheter pump is configured to pump blood at 5 liters per minute and 62 mmHG at while being operated at speeds about 19,000 RPM.