Conveying blades for a compressible rotor

Patent metadata

Field	Value
Publication number	US-2025382970-A1
Application number	US-202519193348-A
Country	US
Kind code	A1
Filing date	Apr 29, 2025
Priority date	Dec 23, 2009
Publication date	Dec 18, 2025
Grant date	—

Abstract

To provide a simple embodiment of a rotor for a fluid pump which is nevertheless very flexible in handling and compressible, in accordance with the invention a conveying blade is provided having at least two struts and a membrane spanned between them in the expanded state, wherein the struts each have at least one joint, in particular more than one joint, which enables an angling in a first direction in a first movement plane and bounds an overelongation beyond an elongation angle of in particular 180° in the opposite second direction. In particular when a plurality of joints are provided at the struts, they, and with them the conveying blades, are particularly flexible for simple compressibility.

First claim

1 - 15 . (canceled)

16 . A compressible rotor for a blood pump, the rotor comprising:
a hub; and at least one conveying blade fastened to the hub, wherein the at least one conveying blade comprises at least one strut, wherein the at least one strut has an outer side, an inner side, a first section, a second section, a cutout, and a film hinge, wherein the cutout is formed on the outer side and between the first section and the second section, wherein the film hinge is formed on the inner side and opposing the cutout, and wherein the film hinge is configured such that the first section is pivotable relative to the second section.

17 . The rotor of claim 16 , wherein the pivoting of the first and second sections relative to each other permits the at least one conveying blade to fold in upon the hub.

18 . The rotor of claim 16 , wherein the film hinge is configured such that:
the first section of the at least one strut is pivotable relative to the second section of the at least one strut in a first direction from an elongated position of the at least one strut to a kinked position of the at least one strut, and the first section of the at least one strut is pivotable relative to the second section of the at least one strut in a second direction from the kinked position of the at least one strut to the elongated position of the at least one strut.

19 . The rotor of claim 18 , wherein the cutout is sized such that the first section abuts the second section at the outer side of the at least one strut to bound overelongation of the at least one strut when the first section is pivoted relative to the second section in the second direction.

20 . The rotor of claim 18 , wherein the cutout is configured such that, from a position where the first section and the second section extend along parallel axes, pivoting of the first section relative to the second section is more limited in the second direction than in the first direction.

21 . The rotor of claim 18 , wherein the first direction is a direction of rotation of the at least one conveying blade during operation.

22 . The rotor of claim 18 , wherein the cutout bounds angling of the first and second sections beyond an elongation angle in the second direction.

23 . The rotor of claim 22 , wherein the elongation angle is from 180° to 190°.

24 . The rotor of claim 16 , wherein the film hinge is made of the same material as the first section of the at least one strut and the second section of the at least one strut.

25 . The rotor of claim 16 , wherein the film hinge is made of a first material and the first section of the at least one strut and the second section of the at least one strut are made of a second material that is different than the first material.

26 . The rotor of claim 25 , wherein the film hinge is connected to the first section and the second section by adhesive bonding.

27 . The rotor of claim 25 , wherein the film hinge is connected to the first section and the second section by welding.

28 . The rotor of claim 16 , wherein the cutout is a straight slit.

29 . The rotor of claim 16 , wherein the cutout is a curved slit.

30 . The rotor of claim 16 , wherein the cutout is formed by laser cutting.

31 . The rotor of claim 16 , wherein the cutout is formed by etching.

32 . The rotor of claim 16 , wherein the at least one strut comprises a plurality of struts, wherein the plurality of struts are configured to pivot from an expanded state to a radially compressed state.

33 . The rotor of claim 16 , wherein the at least one strut comprises a plurality of struts and the at least one conveying blade comprises a membrane held by the plurality of struts.

Assignees

• Ecp Entw Mbh

Inventors

• Er Sami

Classifications

• A61M60/205

  Non-positive displacement blood pumps · CPC title

• A61M60/135

  inside a blood vessel, e.g. using grafting · CPC title

• A61M60/216

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

• A61M60/174

  discharging the blood to the ventricle or arterial system via a cannula internal to the ventricle or arterial system · CPC title

• A61M60/13

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