Blood pump

• US 10,583,231 B2
• Filed: 05/19/2015
• Issued: 03/10/2020
• Est. Priority Date: 03/13/2013
• Status: Active Grant

• Current Assignee: Magenta Medical Ltd.
• Original Assignee: Magenta Medical Ltd.
• Inventors: Schwammenthal, Ehud, Tuval, Yosi, Glozman, Daniel
• Primary Examiner(s): Getzow, Scott M.
• Assistant Examiner(s): Pham, Minh Duc G
• Application Number:
  US15/312,034
• Publication Number:
  US 20170100527A1
• Time in Patent Office: 1,757 Days
• Field of Search: 600 16
• CPC Class Codes: A61B 17/12136 Balloons
• CPC Class Codes: A61B 17/12168 having a mesh structure A61B17/1214 takes precedence
• CPC Class Codes: A61B 2017/12127 Double occlusion, e.g. for creating blood-free anastomosis site
• CPC Class Codes: A61F 2002/068 Modifying the blood flow model, e.g. by diffuser or deflector
• CPC Class Codes: A61M 2205/505 Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
• CPC Class Codes: A61M 2205/52 with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: A61M 2205/80 voice-operated command
• CPC Class Codes: A61M 2230/005 Parameter used as control input for the apparatus
• CPC Class Codes: A61M 2230/20 Blood composition characteristics
• CPC Class Codes: A61M 2230/30 Blood pressure A61M2230/04 takes precedence
• CPC Class Codes: A61M 60/135 inside a blood vessel, e.g. using grafting
• CPC Class Codes: A61M 60/205 Non-positive displacement blood pumps
• CPC Class Codes: A61M 60/216 including a rotating member acting on the blood, e.g. impeller
• CPC Class Codes: A61M 60/33 of kidneys
• 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 60/833 Occluders for preventing backflow
• CPC Class Codes: A61M 60/857 Implantable blood tubes

Abstract

Apparatus and methods are described including a catheter (20), a first pump (24U) disposed on the catheter, and a second pump (24D) disposed on the catheter, proximally to the first pump. A control unit (52) is configured to control activation of the first and second pumps. The first and second pumps are configured, when activated, to pump fluid in opposite directions from one another. Other applications are also described.

Claims

1. Apparatus comprising:

a catheter configured to be placed inside a blood vessel of a subject;

a blood pump disposed on the catheter; and

an occlusion element disposed on the catheter, and configured to partially occlude the subject'"'"'s blood vessel,

the blood pump and the occlusion element being separated from one another along a longitudinal axis of the catheter, and

the blood pump and the occlusion element being configured to generate a region within the blood vessel that is of lower blood pressure than elsewhere within the blood vessel by the blood pump pumping away from a region of the blood vessel between the blood pump and the occlusion element.

2. The apparatus according to claim 1, wherein the blood pump comprises an impeller configured to pump blood through the subject'"'"'s blood vessel by rotating.

3. The apparatus according to claim 2, further comprising a cage, the impeller being disposed inside the cage, and the cage being configured to maintain a separation between the impeller and an inner wall of the blood vessel.

4. The apparatus according to claim 1, wherein the catheter is configured to be placed within a vena cava of a subject such that the blood pump is disposed downstream of junctions of the vena cava with all renal veins of the subject, and such that the occlusion element is disposed upstream of junctions of the vena cava with all renal veins of the subject.

5. The apparatus according to claim 4, wherein the blood pump is configured to lower pressure within the subject'"'"'s renal veins by pumping blood through the vena cava in a downstream direction.

6. The apparatus according to claim 4, wherein the catheter is configured to be placed within the subject'"'"'s vena cava by being inserted via a vein of the subject selected from the group consisting of:

a subclavian vein, a jugular vein, and a femoral vein.

7. The apparatus according to claim 1, wherein the catheter is configured to be placed within a vein of a subject into which a tributary vessel flows such that:

the blood pump is placed in the vein, downstream of the tributary vessel; and

the occlusion element is placed in the vein, upstream of the tributary vessel.

8. The apparatus according to claim 1, wherein the occlusion element comprises a balloon.

9. The apparatus according to claim 1, wherein the occlusion element comprises a frame at least partially covered with a blood impermeable material.

10. Apparatus comprising:

a catheter configured to be placed inside a vena cava of a subject;

a blood pump disposed on the catheter; and

an occlusion element disposed on the catheter, and configured to partially occlude the subject'"'"'s blood vessel,

the blood pump and the occlusion element being separated from one another along a longitudinal axis of the catheter, and

the catheter being configured to be placed within the subject'"'"'s vena cava, such that the blood pump is disposed downstream of junctions of the vena cava with renal veins of the subject, and such that the occlusion element is disposed upstream of junctions of the vena cava with the subject'"'"'s renal veins.

11. The apparatus according to claim 10, wherein the blood pump comprises an impeller configured to pump blood through the subject'"'"'s blood vessel by rotating.

12. The apparatus according to claim 10, wherein the occlusion element comprises a balloon.

13. The apparatus according to claim 10, wherein the occlusion element comprises a frame at least partially covered with a blood impermeable material.